Connection device for corrugated hose
SUBSTANCE: invention is related to connection devices with a connection part, and also arranged with the possibility to insert an insert part in it, which on its external surface has fixing ledges that protrude outside, the connection part is equipped with radially stretching fixators arranged accordingly to the location of the fixing ledges on the insert part, and those fixators during the axial input of the insert part into the connection part pass through the accordingly related fixing ledge by elastic radial deviation, and then radially sag again directly axially behind the fixing ledge. The connection part comprises an inner retention device, through which the corrugated hose is through-conductible in direction of the insert part, and at the same time it performs elastically springing radiation movements, but prevents hose tightening. The corrugated hose juts out until stop into a sealing bush with an axial throughput channel installed inside the insert part. In the coupled condition the retention device of the connection part axially juts out into a reversed receiving hole of the insert part, is blocked against uncoupling of the corrugated hose, and is in direct clamping contact with the sealing bush.
EFFECT: increased operational reliability.
12 cl, 4 dwg
The invention relates to a connecting device for a corrugated hose with a corrugated hose, fitting and made with the possibility of entering into this connecting part of the insertable part.
From DE 3903355 A1 made known in the form of a sleeve coupling device, which is inserted into the corrugated hose. Using formed in the wall of the sleeve elastically deny tongue with directed inward sleeve protrusion for engagement with the trough of the wave corrugated tube is inserted into the sleeve corrugated hose can be secured axially. On the one hand, to seal the hose to the sleeve is provided with a sealing ring, which is inserted into the hollow wave corrugated hose, and, in addition, is provided adjacent to the end faces to the end of the corrugated pipe another seal, which, in turn, is an annular axial groove of the sleeve and adjacent to the inserted end of the corrugated hose. In this case, in order to seal the o-ring should be entered into the hollow of a wave at the end of the corrugated hose before inserting corrugated hose, as the seal with the face side often does not provide a sufficient seal, first of all, if the corrugated hose who astout force in the direction of the sleeve.
DE 19723410 A1 describes a mounting structure for a corrugated hose is essentially a hollow cylinder pipe that is coming corrugated hose and then there is fixed from axial contraction of the corrugated hose through at least one located in the longitudinal direction of the corrugated hose depreciation legs. At the same time depreciation leg or depreciation legs pressed annular clamping ring to the outer side of the corrugated hose, thereby achieving sufficient protection against contraction corrugated hose with coupling sleeve. Seal corrugated hose with respect to the connecting pipe is inserted through the hollow of the wave sealing rings of round section. To seal again requires two parts, namely the o-ring and clamping ring to compress depreciation legs radially inward to Gavrilovna hose and, thus, to the connecting pipe.
The coupling devices of the DE 19943764 A1 corrugated hose again looming on the connecting pipe and is prevented from pulling through consisting of two parts, the drop-down locking cuffs. On the inner side of the fixing cuff provided by the Zats the determinant elements for insertion into the hollow of a wave undulating outer contour of the corrugated hose, in this two part locking cuffs made with the possibility relative to each other moving and fixing flush with each other and with the outer side of the corrugated hose. Using film both parts of the hinge cuff hinged to the connecting pipe. Thus, this is a very good safeguard against unwanted retraction of corrugated hose with coupling sleeve. The seal occurs between the corrugated hose and the connecting pipe, but only through accurate planting these both Adigeni each other parts. To expand the locking cuff, the installation requires a relatively large space in cramped installation conditions are often missing.
Finally, from DE 102005031871 B3 known connecting device for a corrugated hose, which contains the connecting piece, which can be inserted plug-in part. At the end of the plug side insert installed connecting pipe with connection nipple, which is coming corrugated hose. Also provided by the shaped seal, which is located on the connecting pipe and which can be vdvinul the end of the corrugated hose. Axially above this seal is within the and navigaia sleeve, which has elastic cushioning legs, which are made with the possibility of two-stage cast into engagement with located on the connecting pipe retaining means. At the first stage sleeve is fixed on the connecting pipe so that the inner diameter of the seal allows the input end of the corrugated hose, while at the second stage sleeve fully coming on top of the seal and its depreciation legs with detent connected with locking means. When this seal zapressovyvajutsja on the outer wall of the corrugated hose in such a way that the sleeve of his internal party presses the seal to the connecting pipe and thrust corrugated hose. However, to really secure retention corrugated hose device on its end, on which the corrugated hose is included in the device additionally provides protection from collapsing in the form consisting of two parts, the drop-down locking cuffs, which at its inner side contains siteplease device for engagement with geometric circuit with an undulating outer contour of the folding and fixing her two half-bowls. This known device offers very good protection from tightening corrugated hose with connecting Patra is ka, very reliable seal between the two parts and can also be supplied in pre-assembled condition. However, the entire device is relatively complex and expensive, and its installation is also relatively complicated because of the two-stage fixation between the connecting part and the detachable part, as well as additional connections and locking from tightening consisting of two parts locking cuffs.
In this case the invention is to eliminate drawbacks and to provide a connecting device for a corrugated hose, which is still very good seal has a simplified construction and allows for quick installation.
According to the invention this is achieved by a connecting device for a corrugated hose, which contains corrugated hose, fitting and made with the possibility of inserting into it a plug part, which at its outer surface is spaced circumferentially offset to each other, protruding locking lugs, while the connecting portion on its outer surface provided with a radially stretchable, located respectively to the location of the locking tabs on the plug retainers that when the axial input of the stationary part in a fitting move with elastic radial deviation respectively associated locking tab, and then when reaching the articulated state again radially inward directly for axially locking protrusion with the locking it, while the connecting part has an internal restraint, which prevents retraction conducted through the restraint of the hose and it can be elastically springy radial movement as well as axial end section of the corrugated hose to the stop projects into the inside of the plug seal sleeve, which forms an axial flow channel, and in coupled condition of restraint fitting axial cuts facing the receiving hole of the plug and is blocked from tripping corrugated hose.
The proposed coupling device is relatively simple in construction, quickly assembled and is primarily in the radial direction, particularly small occupied area, in relation to typically cramped conditions for installation, which uses such a connecting device, for example in combination with a liquid pipelines in vehicles, for example the supply pipe washer fluid or the like, and in other cases, it may be b the greater the importance. In addition, it is possible to manufacture the connecting device according to the invention of an inexpensive plastic material such as Polyoxymethylene, as it does not require the use of materials of higher quality, as, for example, it is necessary to also often used in the past injected cold plate end parts.
The connecting device according to the invention in practice is normally supplied in pre-assembled state in which the plug is already located therein sealing sleeve is introduced into the connection part, but only so that the tabs of the connecting part has not moved over the locking tabs on the plug, so that the fixation between the coupling and the plug part is not yet implemented. In this pre-assembled state, the user can then cut corrugated hose of the desired length from the roll, after which the hose is inserted into the hole of the fitting from the outside and pushed through it into the seal sleeve until it stops at its end. When the lower tabs of the connecting portion due to the external contour of the corrugated hose is radially stretched, so that the corrugated hose can easily easily inserted up to the stop on the end flange o W the CTL. Now in the pushed state, the latches connecting part is fixed with an outer forming corrugated hose due to the fact that the speakers of these retainers lots of tabs engages with the depression wave corrugated hose between two crests of a wave to the outside of the corrugated hose. However, the contraction of the corrugated hose with plug and connector parts are then no longer possible, since during the reverse movement of the corrugated hose clamps connecting part is no longer stretched. If the user has inserted the corrugated hose until it stops in a pre-assembled construction, it should then only axially move each other connectors and plug up until the latches to the outside of the connecting part is fixed with the respective associated locking tabs to the outside of the plug. With subsequent axial movement of the retaining device inside the fitting axially slide into the addressed receiving hole of the plug-in part at least through the initial axial area is situated thereby there in the plug-in part and adjacent to its inner surface so that achieved through restraint protection from contraction of the corrugated hose is blocked from his RA is Yedinaya. In a pre-assembled state, that is during threading of corrugated hose through the connecting part, the internal restraint of the latter is not in engagement with the plug part, so necessary for the smooth insertion of the corrugated hose movement, for example radial tensile move, if the restraint is, for example, from passing axially springy rods with directed radially inward at their protruding ends of the locking tabs can be completely unhindered.
In the final axial joint consideration of the fitting and the plug holding device inside the fitting, if it is introduced, for example, addressed to him in the receiving hole of the plug, comes in contact with the end surface of the sealing sleeve, the task of which is so that it is in a fixed state of the connecting piece and the plug parts together axially shifted from the holding device to a predetermined size and thereby compressed, whereby the seal between the corrugated hose and insert the hose due to the resulting increased pressure within the sealing sleeve is particularly effective.
Sneaky is relevant implementation when assembling the lower corrugated hose in a pre-assembled construction and subsequent fixation of the coupling and the plug are two simple, quickly implemented measures that guarantee a smooth and fast installation connecting devices.
A connecting part formed inside the holding device as well as push-in part, be made with little cost from a suitable polymeric material, preferably Polyoxymethylene (RUM). Located inside the plug sealing sleeve, for its part, is molded under pressure from a suitable elastic material, for example of ethylene-propylene-diene-methylene (EPDM), NBR or, particularly preferably, from thermoplastic elastomer.
Preferably, in the connection device according to the invention, each clamp has two axially passing in the direction of the circle is shifted to each other side plocica that on their protruding ends are connected to each other through the locking shackle, the distance in the direction of the circumference between the two side hangers selected so that when the input of the plug associated with each detent locking tab may axially to pass through between both lateral sides of the retainer. Due to this, you will create a simple in their design, but very effective pinning, which, in addition, due to the locking arms can also withstand the relatively large separating forces.
The next preferred option of a connecting device according to the invention is that the retaining device connecting part is located along the circumference offset to each other, passing essentially axially springy tabs on the ends of which in each case is directed radially inward locking prong, for example, in the form of a locking ledge that juts out into the hollow of a wave between two wave crests passing through the corrugated pipe.
Preferably, while the springy tabs on their protruding ends of the radially from the outside are supplied respectively to the adoptive bias, which is when the axial input of the plug in the fitting communicates with the corresponding opposite slope on the inner side facing the springy tabs terminal region of the plug, while in the articulated condition, each spring tongue in the radially outward direction (and thereby against the weakening of protection tightening corrugated hose) blocked. Thanks in assembled mated condition of the connecting device can be provided with effective protection from contraction of the corrugated hose.
Further, it is advantageous if the connecting device according to the invention it is cleanrom state restraint fitting is released from the inner wall of the plug in blocking geometric closure with outer profile wall corrugated hose.
In the connecting device according to the invention the sealing sleeve is inserted back in the plug and pushed it only without fixing that only in the fully assembled state is under pressure, can have any suitable shape. Preferably, it is made, however, essentially in the form of a cylinder and its located is pushed on the end of the corrugated hose end goes in made in the form of a circular ring closing plate, which made Central in the shape of a circle carrying the hole. This simple form of the sealing sleeve is, however, very effective, as it allows easy lowering corrugated hose during installation and at the same time also forms a reliable resistant surface with a circular closing plate for the associated end side is pushed corrugated hose.
In a particularly preferred variant of the invention the plug is at its facing away from the connecting part side while reducing its diameter forms a connecting pipe whose inside diameter corresponds to the free internal diameter of the corrugated hose. The resulting reduction of the internal diameter of the plug can also be used to serve as a stop for the time is spent from the connection part of the axial end of the sealing sleeve.
The resulting connection can serve as a direct connection with the wall, such as wall of the receiving tank of liquid sodomylaws system in a vehicle or the like, or, equally, there is, for example, also again through the corresponding connecting device can connect the end of another corrugated chlorobromide.
Particularly preferably, each locking tab of the plug on its outer circumference is provided to the adoptive slope, which descends in the direction of insertion and which when the axial input of the plug (3) in the connecting piece with elastic radial tensile passes respectively associated latch. Due to this, can provide a very effective and extremely fast Assembly of the fitting and the plug with a minimum expenditure of time.
In the connecting device according to the invention the connecting part and the plug is preferably provided with respectively four locking tabs (plug) or clamps (connecting part)arranged with an offset of 90° to each other in the circumferential direction.
Particularly preferably, in the connection device according to the invention the connecting piece and/or plug produces what I'm made of plastic, particularly preferably Polyoxymethylene, and the sealing sleeve is made of thermoplastic elastomer (TPE).
Also preferably, the outer casing of the plug is at least one other, preferably, however, two or four other locking tabs on the axial distance from the locking protrusions are offset in the direction of lowering in the connecting part, each of them with accommodation, respectively, the locking tab protrudes outward from the outer surface of the plug, the distance is selected corresponding to at least the axial length of the tabs. Thus, the connecting part and the detachable part can be pre-recorded already in the position in which they are not yet fully committed to each other, and thereby prevents their disengagement from each other, for example, transportation or manipulation before the final commit.
In General, the connecting device according to the invention forms a relatively simple construction which can be supplied to the user is already in a pre-assembled state, and the user should not be able to be connecting piece hose predetermined length, and can be unwound from a roll and cut. In addition, the connecting device is istwo according to the invention is easily mounted, this set the seal, which in the assembled state is influenced by direct pressing, also contributes to the excellent seal between the corrugated hose and the plug-in part.
Hereinafter the invention is explained in more detail with reference to the drawings, in which:
figure 1 is a side view of the proposed coupling device in a pre-assembled state, which is already inserted corrugated hose;
figure 2 - section through depicted in figure 1 design according to the location of section a-a in figure 1;
figure 3 is a view in section corresponding to the image in the context of figure 2, but in this case fixed, the United state (end position);
4 is a depiction in perspective of a connecting part according to another form of embodiment of the invention.
Figure 1 is the side view showing the connecting device 1, which contains the connecting piece 2, and partially entered into the plug-in part 3, in which the side of the fitting 2 is inserted to the end portion of the corrugated hose 4.
On the circumference of the connecting part 2 in its converted to plug-in part 3, the end region of the side surface is provided with four offset one against the other in each case by 90° in the direction of the circumference, protruding from the outer side surface connecting cable Inc is the first part 2 and directed to the plug-in part 3, radially expansible retainer 5. Shown in the figures form the implementation of each latch 5 is formed from two bent outward from the outer side surface of the connecting part 2 and passing in the direction of the insertion part 3, remote locations relative to each other in the direction of the circumference at a distance In the lateral shoulders 6 and 7, which at its free protruding ends are connected to each other through the locking arm 8 (in the form of a transverse arch), which, in turn, on the side view, as shown in figure 1, has a perpendicular orientation relative to the longitudinal middle line of the connecting device (namely, aimed in the direction of circle).
In conjunction with each of the tabs 5 on the outer circumference of the plug 3 are again shifted one relative to the other in each case by 90° in the direction of the circumference of the protruding radially outward locking protrusions 9, namely in such a way that, as shown in figure 1, when the axial joint shear coupling part 2 and the plug 3 (after installation) respectively associated with each locking protrusion 9 of the locking arm 8 is deflected towards the radially outer end of the associated locking protrusion 9 of the receiving slope 10 with the elastic stretching of the lateral shoulders 6 and 7 (radial out), and at the same time mentioned pikirayi the protrusion 9 can be carried out between both lateral sides 6 and 7 through to its opposite position, figure 1 is a side corresponding to the locking arm 8. If he has been under the locking bail 8 and it thus overlaps the radially outer end receiving a bias of 10 and the locking protrusion 9, she pressed back in shown in figure 2 radial starting position, namely, directly facing away from the connecting part 2 of the back side of the mentioned locking protrusion 9.
It United the locked position shown in figure 3 in the section.
As follows from the slice images in figure 2 and 3, the connecting piece 2 in its inner part holding device in the form of distributedly located in the direction of the circumference to each other reeds spring 11, which in its resting position, which is shown in figure 2, are essentially coaxially relative to the longitudinal Central axis of the connecting device 1 and the corrugated hose 4 and at their free ends in each case provided with protruding radially inward locking teeth in the form of a fixing protrusion 12, which is, or which, respectively, in the rest state of the spring tongues 11 are in the grip obecause on the outer loop is entered corrugated hose 4 depression waves (between two axially displaced with respect to each other crests).
As further can be seen from figure 2, each locking tab on its the th converted from the plug-in part 3, the back side is equipped with a foster slope 20, which, as clearly shown in figure 2, when the lower corrugated hose 4 in the connecting part 2 and further in the insertion portion 3 communicates with the side surfaces located in front in the direction of the lower crests of the waves, whereby when the lower spring tabs 11 radially presses out up until you mentioned the locking protrusion 12 on each elastic tongue 11 will not come out of the trough, from which he was engaged, and because of this corrugated hose 4 can be vdvinul without problems and errors.
In the fully-pushed state corrugated hose 4 (pre-assembled state of the connector part 2 and the plug 3) each locking tab 12 reeds spring 11 again engages flush with the corresponding hollow waves and prevents undesired reverse movement of the corrugated hose 4 of the plug 3 and the connecting part 2, as the locking tab on its facing toward the plug end side is not receiving bias, and focused there vertically to the longitudinal axis of the connecting device 1 and the corrugated hose 4.
In addition, each spring tongue 11, as also shown in figure 2, on the radial outer circumference of its protruding end is equipped with a foster slope 13, to the which upon further lowering of the plug 3 in the connecting part 2 shall come into effective engagement with the located on the end of the associated holes of the plug 3 on the inner side of the reception counter the slope 14.
If the connecting device 1 depicted in figures 1 and 2 of the original, pre-assembled position after entering the corrugated hose 4 moves into its end position according to figure 3, then the receiving slope 13 reeds spring 11 and the receiving slope 14 of the plug 3 find each other, and after insertion part 3 is pushed into the connection part 2 is still on a specific, pre-selected axial section, in the end, completely United state occurs for reeds spring 11 shown in Fig 3 end position. In this case, by receiving slope 14 of the plug 3 springy tabs from them are shown in figure 2, the starting position is slightly pressed radially inward, so that by this is achieved a particularly strong and effective locking engagement of the locking projections 12 by engagement with the trough of the waves on the outer circumference of the corrugated hose 4.
As further shown in figure 2, is already in pre-assembled state of the connecting device 1 to the inside of the plug 3 is placed a sealing sleeve 15, which is composed of a suitable material, preferably of thermoplastic elastomer, and has essentially the form of a cylindrical sleeve that is facing away from the connecting piece 2 to the CE enters located perpendicular to the Central axis of the connecting device 1 and the corrugated hose 4 closing plate 16 in the form of a circular ring. This plate provides a Central, made in the circular hole 17, which is about the same size as the free inner diameter d of the corrugated hose 4.
The body of the plug 3 on its facing away from the connecting piece 2 side on the axial distance from the locking projections 9 formed with a decrease in its outer and inner diameter of the connecting pipe 18. As shown in figure 2 and 3, in the area of the plug 3, which is reduced in diameter and which then goes into the tail section 19 of the connecting pipe has a bearing seal sleeve 15 in the axial direction due to the fact that it is there rests on the radially obliquely downward due to the decrease of the diameter of the inner wall of this section of the plug 3.
In a pre-assembled state, i.e. when the plug 3 is inserted into the connecting piece 2 to shown in figures 1 and 2 relative connection, the sealing sleeve 15 is inserted inside the plug 3 to the stop only desacralize.
If then, after lowering corrugated hose 4 in a pre-assembled construction is achieved intermediate state according to figure 2, in which the end of the corrugated hose 4 from the lower adjacent to the circular closing plate 16 seal the second sleeve 15, springy lugs 11, as shown in figure 2, are not yet in contact with the facing end side of the sealing sleeve 15.
If then the connecting device 1 is translated in its articulated end state, which is shown in figure 3, freely protruding end surface of the spring tongues 11 or fixing protrusions 12 after logging in facing the hole of the plug 3 come into adjacent contact with turned to him a face surface of the sealing sleeve 15. Since the dimensions of the parts are chosen so that after this initial adjacent the insertion part 3 is still on a small axial section is pushed into the connection part 2, springy lugs 11 with their protruding ends pressed against the sealing sleeve 15 and shorten its axially by a specified distance, whereby the sealing sleeve 15 with a simultaneous slight axial shortening is exposed in the axial direction of the effect of pre-tension. This pretensioning of the sealing sleeve 15 leads to the fact that it is not very tightly and firmly adheres to the facing inner surfaces of the insertion part 3, and also in the field in which the insertion part 3 has a reduced diameter formed therein a pressure pre-tension additionally, the Veda is also a particularly good fit to the outer sides of the crests of the corrugated hose 4, so, in General, creates an excellent seal between a corrugated hose 4 and the plug part 3.
In this final installation position of the connecting device 1 tension spring tongues 11 long hampered by the plug 3, whereby for the corrugated hose 4 provides an effective protection against retraction.
Figure 4 shows a perspective view of another form of implementation for the plug-in part 3, which along with locking tabs 9 for the final fixation on the axial distance and to them (see figure 4) are two more biased towards each other by 180° locking protrusion as a preliminary locking projections 9A, as shown in detail in figure 4, and in this respect provides a unique reference to a graphical representation. These preliminary locking projections 9A are the same size and shape as the locking protrusions 9, and serve to connect the plug-in part 3, is pushed to the axial seal retainer arms 8 to the locking projections 9, as this corresponds to the position of figures 1 and 2, also already in this position with the connecting part within the pre-fixing. Thus, both parts in this position, even if they are not permanently fixed, no longer able to be separated axially from each other in the time the I transport and manipulation before final fixation with locking protrusions 9. For the final fixation of the two parts should then be pushed next to each other just yet and the corresponding axial section, and the tabs 5 are transferred through the inclined surface of the locking protrusions 9, after which the final commit.
If desired, the plot and can also be selected so that it is slightly larger than the axial length b of the latches 5 (cf. figure 2). In this case, in the pre-locked state between the connecting part 2 and in part 3, there is a small axial gap.
1. The connecting device (1) for the corrugated hose (4) with a corrugated hose (4), the connecting part (2)and with the possibility of inserting in this connecting part (2) plug-in part (3), which on its outer surface is spaced circumferentially offset to each other, protruding locking tabs (9), while the connecting part (2) on its outer surface provided with a radially stretchable arranged correspondingly to the arrangement of the locking protrusions (9) of the plug (3) clamps (5), that when the axial input of the plug (3) in the connecting piece (2) pass with elastic radial deviation respectively associated locking tab (9), and then when reaching socl the United States again radially inward directly for axially locking protrusion (9) with fixation with him, when this connecting part (2) contains an inner retaining device (11)through which the corrugated hose (4) is conducted through in the direction of the insertion part (3), which may make elastically springy radial movement, but prevents retraction of the hose, also axial end section of the corrugated hose (4) to the stop projects into the inside of the plug (3) seal sleeve (15)which forms the axial flow channel (17), and in the coupled state of the retaining device (11) of the connecting part (2) axial cuts facing the receiving hole of the plug (3) and is blocked from tripping corrugated hose (4)and is in direct prijemnom contact with the facing axial end side of the sealing sleeve (15).
2. The connecting device according to claim 1, in which each retaining pin (5) has two axially passing in the direction of the circle is shifted to each other side plocica (6, 7), which on their protruding ends are connected to each other through the locking handle (8), the distance (C) in the direction of the circumference between the two lateral shoulders (6, 7) is selected so that when the input plug-in part (3) associated with each detent (5) locking tab (9) may the ACU is material to pass through between the two correlated lateral shoulders (6, 7).
3. The connecting device according to claim 1 or 2, in which the holding device of the connecting part (2) is located along the circumference offset to each other, passing essentially axially springy tabs (11), the ends of which in each case is directed radially inward locking tab (12), which juts out into the hollow of a wave between two wave crests passing through the corrugated pipe (4).
4. The connecting device according to claim 3, in which the springy tabs (11) at its protruding ends of the radially from the outside are supplied respectively to the adoptive bias (13)that when the axial input of the plug (3) in the connecting piece (2) communicates with the corresponding opposite bias (14) on the inner side facing the springy tabs (11) end region of the plug (3)in an articulated condition, each springy tongue (11) in a direction radially outward blocked.
5. The connecting device according to one of claims 1, 2 or 4, in which in the articulated condition holding device (11) of the connecting part (2) is released from the inner wall of the plug (3) in blocking geometric closure with outer profile wall (4) corrugated hose.
6. The connecting device according to one of claims 1, 2 or 4, in which the connecting part (2) and the and the plug-in part (3) consists of (Yat) of plastic material, preferably Polyoxymethylene.
7. The connecting device according to one of claims 1, 2 or 4, in which the sealing sleeve (15) in the plug (3) has an essentially cylindrical shape, which is located at its pushed on the end of the corrugated hose (4) end goes in made in the form of a circular ring closing plate (16), which made Central in the shape of a circle carrying the hole (17).
8. The connecting device according to one of claims 1, 2 or 4, in which the plug-in part (3) facing away from the connecting part (2) side to decrease its diameter forms the connecting pipe (18), the inner diameter of which corresponds to the free inner diameter (d) corrugated hose (4).
9. The connecting device according to claim 1 or 2, in which each locking tab (9) of the plug (3) on its outer circumference provided with a receiver bias (10), which descends in the direction of insertion, and when the axial input of the plug (3) in the connecting piece (2) with elastic radial tensile passes respectively associated latch (5).
10. The connecting device according to one of claims 1, 2 or 4, in which the connecting part (2) and plug (3) contain, respectively, four are located in the direction of the circumference of the offset na° to each other locking device (9) or retainer (5).
11. The connecting device according to one of claims 1, 2 or 4, in which the sealing sleeve (15) consists of a thermoplastic elastomer material (TPE).
12. The connecting device according to one of claims 1, 2 or 4, in which the outer surface of the plug (3) is at least one other, preferably two or four other locking device (9A) on the axial distance (a) from the locking tabs (9) offset in the direction of lowering in the connecting part (2), each of them with accommodation, respectively, the locking projection (9) protrudes outward from the outer surface of the plug (3), the distance (a) when considered in the axial direction of the device (1) selected relevant, at least, the length (b) of the clamps (5).
FIELD: pipelines; corrosion prevention.
SUBSTANCE: insulating coupling comprises: a metal case in the form of a hollow cylinder with an inner collar, rigidly fixed with two flanges which have holes for standard fastening elements; an electrically-insulating joint between the pipes; two hollow cylinders made from dielectric materials placed inside the metal case, one of them is limited by an inner collar. The following is positioned inside the cylinders: sealing gasket rings; two metal rings; two C-shaped rings with claws on the inside and spherical external surface made from the material harder than the material used for the pipes; two driving washers with taper surface on the inside and two stepped dielectric bushings. The flanges on the case are fastened to the pressure flanges with cylindrical noses which are tightly inserted into the hollow dielectric cylinders.
EFFECT: increases the pipe coupling durability.
FIELD: pipeline coupling.
SUBSTANCE: coupling comprises the flange connection with holes for standard fastening elements; fastening elements: bolts, nuts and ring plates; a dielectric spacer between the flanges; dielectric inserts in the form of dielectric bushings and plates isolating the fastening elements from the flanges, of a dielectric pipe inside the flange connection to extend the dielectric clearance. Flanges have a cylindrical nose with threaded openings, where pressure bolts are positioned uniformly around the nose, these bolts thrust against metal rings positioned in the flange rings. When the pressure bolts are tightened, metal rings move and press the sealing gaskets, which are also positioned in the flange rings between the dielectric spacer, metal ring and cylindrical noses.
EFFECT: reliable pressurization of the flange coupling.
FIELD: machine building.
SUBSTANCE: pipe connection has seat element with internal thread designed for assembled conjugation with rod element having external thread. Dimensions of conjugated threads facilitate radial tightness in assembly, while a thread pitch of the rod element is shorter, than a thread pitch of the seat element at value sufficient for compensation of axial elongation of thread of the rod element and axial compression of thread of the seat element occurring during assembly of the said elements as result of radial tightness between conjugated threads, facilitating in essence equality of steps of conjugated threads in assembles state. There are disclosed versions of pipe threaded connection.
EFFECT: increased reliability of connection.
27 cl, 8 dwg
FIELD: machine building.
SUBSTANCE: here is disclosed method for connection of multi-layer metal-polymer pipes. Pipes are connected by welding through a connecting device having not less, than two connecting elements with seats for end sections of pipes. Welding is performed along external, internal and end surfaces of the end section of the pipe enveloped with internal surfaces of the seat of the connecting device. Also, the end section of the pipe and seat of the connection device are preliminary simultaneously heated. Successively, preliminary heated sections of the pipe and the connection device are matched. To avoid destruction of polymer layers and exposure of an internal metal layer and for removal of adhesion layers of the pipe applied on the metal layer the end section of pipe is heated to softening temperature of material of external and internal layers of the pipe at pipe and the connecting device matching. The seat of the connecting device is made in form of a circular slot coaxial with an internal orifice of the connecting element of the connecting device. The circular slot has a cylinder wall from the side of external surface of a connected pipe and a conic wall truncated along plane of the end of the connecting element from the side of internal surface of the connected pipe. The seat is preliminary heated to melting temperature of material of the connecting device. The end section of the pipe and seat are preliminary heated by means of a welding device equipped with a control unit and a heater whereon there are arranged a tool of the pipe and a tool of fitting. Temperature of the heater and tool of fitting directly contacting surface of the heater equal to temperature of connecting device material melting is set with the control unit and is maintained at a constant level within ranges of preset error. Securing the tool of the pipe on the heater through a transit bush facilitates limit of end section of the pipe heating to temperature not exceeding softening temperature of material of external and internal layers of the pipe. The tool of the pipe can travel along axis of the transit bush for adjustment of heating temperature at external conditions change.
EFFECT: upgraded quality and reliability of connection of multi-layer metal-polymer pipes.
FIELD: machine building.
SUBSTANCE: according to present method components of analysed group of threaded connections are determined by analysis of model. Further, the first group of threaded connections in an analysed group is subjected to physical tests. There is performed modelling analysis of the first and second groups of threaded connections. Physical tests are not carried out for the second group. After modelling results of a physical test and modelling analysis are compared to obtain a factor of working characteristic for the first group. Further, the factor of the working characteristic is applied for the second group and limits of functionality are determined on base of this factor of the working characteristic.
EFFECT: increased reliability of threaded connections.
18 cl, 5 dwg
FIELD: machine building.
SUBSTANCE: device consists of metal case in form of cylinder with internal cylinder groove restricted with internal circular lug, and also having cylinder lug on external surface. Two stepped cylinder of dielectric material and a sealing padding are set between the pipe and the groove of the case. A metal ring, a C-shaped ring made of material harder, than material of the pipe and a movable bush are arranged between the pipe and the cylinder of dielectric material. Uniform around circumference transfer of the end cover, of the stepped cylinder positioned before it and the pipe, and of the movable bush occurs in axial direction at tightening bolts which enter orifices in the cylinder lug of the case and the end cover. With its internal conic surface the movable bush weighs upon external surface of the C-like ring, compresses it, forces pointed radial lugs of the C-like ring into a body of the pipe and fixes the pipe in the insulating device for pipe assembly. It also compresses the insulating padding.
EFFECT: insulating padding, three cylinders and insertion of dielectric material form reliable electro-insulating circuit.
FIELD: machine building.
SUBSTANCE: connection consists of first and second expanded tubular elements each containing multitude of bent sheets. Each sheet has concave and convex surfaces and a place of connection whereat one of multitude of bent sheets is attached to another from multitude of bent sheets, and multitude of connecting elements each positioned on at least one of multitude of bent sheets. The first and the second expandable elements can be expanded and compressed. Multitude of connecting elements of the first tubular element interacts with multitude of connecting elements of the second tubular element.
EFFECT: increased strength and pressure tightness of connection.
33 cl, 28 dwg
FIELD: machine building.
SUBSTANCE: electro-insulated connection of pipelines consists of metal branches with ring bosses whereon there is formed fastener in form of bush out of composite material, of protective ring out of dielectric material installed between ends of branches and of packing collar out of elastomer material enveloping end sections of branches. Circular recesses are made on the end sections of the branches on their end surfaces; behind the cross section of the recesses to the side of the opposite branch there are made circular projecting sections. The protective ring has a narrow section installed between the circular projecting sections and a convex section put on the circular projecting sections. The packing collar envelopes the protective ring with its internal surface; while with its external surface it contacts surface of a cavity formed with the fastener and ends of the branches. Adjacent surfaces of the projecting sections of the branches ends and the packing collar are glued.
EFFECT: increased reliability of pressure tightness of connection under low and high loads.
2 cl, 2 dwg
FIELD: machine building.
SUBSTANCE: connection of main and lateral pipelines in heat systems consists of T-joint on main pipeline and of L-shaped tubular insertion. The side branch of the T-joint is perpendicular to the lateral pipeline. According to the first version the L-shaped insertion connects the side branch of the T-joint with the lateral pipeline. The distinguished feature of the claimed design of the first version is connection of the L-shaped insertion with the side branch of the T-joint by means of a hinge wherein axis of rotation coincides with axis of the branch. According to another version the lateral pipeline has a L-shaped tubular element wherein one axis is parallel to axis of the side branch of the T-joint, while a "П"-shaped tubular insertion is installed between the branch of the T-joint and the L-shaped element of the lateral pipeline. The tubular insertion is connected to them by means of pivot connections with axes of rotation coinciding with axes of the side branch and L-shaped element.
EFFECT: increased reliability of pipelines connection.
2 cl, 5 dwg
FIELD: machine building.
SUBSTANCE: coupling is made with grooves. In the middle part of the coupling there is located an arrester for centring connected pipes. Grooves are cut on ends of connected pipes on external side; before connection the grooves are preliminary filled with glue composition; ends of the pipes are successively press fitted into the coupling.
EFFECT: raised reliability of pipes connection, preservation of internal coating of pipes.
FIELD: pipeline engineering.
SUBSTANCE: joint comprises two metallic branch pipes and ring made of dielectric material and interposed between the faces of branch pipes. The branch pipes have bells which are interconnected through insert by permanent dielectric adhesive joint from the inside and through metallic coupling by permanent dielectric locking adhesive joint on the outside.
EFFECT: enhanced reliability and prolonged service life.
4 cl, 1 dwg
FIELD: electrical engineering.
SUBSTANCE: proposed device has case for abutting against body to be brought in contact and at least one contact member set in wiring position between case and body to be brought in contact so as to establish electrical connection with current-conducting part of this body. At least one laminated contact member is made of alloy that has in its composition at least 94.5% of copper (Cu), 2 - 4% of nickel (Ni), 0.5 - 1% of silicon (Si), and 0.05 - 0.25% of magnesium.
EFFECT: reduced pressure on contacted body.
21 cl, 7 dwg
FIELD: pipeline transport.
SUBSTANCE: pipe comprises fiberglass layer with electroconducting binder. The electroconducting binder is applied only on the outer side of the reinforced fiberglass layer.
EFFECT: enhanced reliability.
FIELD: the invention refers to the field of the pipeline transport and may be used for electric disconnection of pipelines and/or their sections particularly at protecting them from corrosion.
SUBSTANCE: dielectric insertions are placed between adjacent butt-ends of two sockets fulfilled out of the material of the pipeline and between the sockets and the exterior muff connecting them. The interior surface of the sockets in the zone of location of the muff is provided with ring lugs with the height exceeding the thickness of the dielectric insertions between the sockets and the muff and radial distribution of sockets is carried out as a minimum until elimination of gaps between the sockets and the muff along the entire length of their coupling. The ring lug on the interior surface of the sockets are made by way of fixing of packing rings inside the sockets. As dielectric insertions between the sockets and the muff an exterior plastic covering of the sockets may be used. In case of transporting along the pipeline of electrically conducting fluid the inner surface of current insulating insertion is provided with dielectric covering.
EFFECT: reduces labor-intensiveness of manufacturing.
4 cl, 3 dwg
SUBSTANCE: insulating coupling comprises thickened branch pipes which are cut in the pipeline over their outer diameters. The inner side of the branch pipes is provided with thin-walled sealing members arranged with a spaced relation to each other. The insulating coupling is mounted in the split coupling. The spaces between the split coupling and branch pipes receive the reinforced dielectric material.
EFFECT: enhanced reliability.
2 cl, 2 dwg
FIELD: pipeline engineering.
SUBSTANCE: electrically insulating fitting comprises two metallic branch pipes and dielectric member which are interconnected through the threaded joint whose inter-thread space is filled with the glue composition. The flexible member is interposed between the face of the dielectric member and face surfaces of branch pipes for permitting control of the load in the thread to provide optimal gluing pressure.
EFFECT: enhanced reliability.
FIELD: pipe joints.
SUBSTANCE: joint comprises male member provided with thread turns that define the pitch of the load-bearing side, pitch of the stabilizing side, and nominal pitch. The female member has thread turns that engage the thread turns on the male member. The turns of the thread on the female member define the pitch of the load-bearing side, pitch of stabilizing side, and nominal pitch. At least one of the pitches of the load-bearing side and pitches of the stabilizing side on, at least, the female member or on the male member changes controllably from the specified distance from the end of the thread turns. The pitch of loading and pitch of stabilizing are different at least over a part of the thread length.
EFFECT: enhanced reliability.
44 cl, 26 dwg
FIELD: rocket-space engineering.
SUBSTANCE: nondetachable joint comprises end member made of bushing with shank at its one end and face ring groove at its other end and tubular member made of composition material glued in the groove of the end member. The end member is provided with axial slots from the side of the face ring groove to define pairs of tabs each of which has inner and outer tabs. The pairs of inner and outer tabs are tightened to corresponding surfaces of the tubular member by means the radial fastening members. The bend rigidity in the cross-sections of the inner and outer tabs may be the same. The tubular member may be provided with ends strengthened in radial direction.
EFFECT: enhanced reliability.
2 cl, 3 dwg
FIELD: mechanical engineering.
SUBSTANCE: joint comprises joining member made of a material with the shape memory effect. The end of one of the parts is provided with ring provided with a groove. The end of the other part is provided with the second ring having a projection. The projection is coated with a material with the shape memory effect. The thickness of the coating depends on the deformation to be recovered.
EFFECT: enhanced reliability.
1 cl, 1 dwg
FIELD: engines and pumps.
SUBSTANCE: elongated column assemble contains hollow pumping booms and jointing elements with an axle jointed together between the driving head arranged of the petroleum well surface and rotary pump arranged in the hole bottom. Every boom has, at least, one end with inner thread to mate the jointing element outer thread, e.g. a nipple. To optimise the strain distributions across the structural elements, the threads with various profiles are used, e.g. an asymmetric truncated cone and varying taper thread profiles. The collars to transmit torque have maximum possible mean diameter and cross-section to rule out accumulation of reactive torque in the column. A modified nipple has, preferably, a seal on its free end to reduce the risks of corrosion. A modified boom can have a number of orifices on each its end to increase flow of medium to forced out.
EFFECT: higher shear resistance, lower concentration of strains and lower accumulation of reactive torque.
34 cl, 35 dwg, 1 tbl