Safety connecting device, in particular, for pipeline, end connecting coupling of such device and method of nut producing for it

FIELD: machine building.

SUBSTANCE: invention relates to safety connection device. Device connects first end connecting coupling (1) with second end connecting coupling (2), in particular, for pipeline. Nut (15) has threaded hole (17), in which first end connecting coupling (1) is screwed in along longitudinal axis (X). In tightening position first end connecting coupling (1) supports axial mechanical stress with arranged in nut second end connecting coupling (2). Rotation preventing device is provided between nut (15, 115) and, at least, one (2) of end connecting couplings, in order to prevent relative rotation, except for those cases, when torque exceeding predetermined threshold value is applied to them. Rotation preventing device consists of, at least, one tab (21), made in nut (15) material so, that to create interferences with possibility of locking for, substantially, flat working surfaces formed on second end connecting coupling (2).

EFFECT: invention increases connecting device reliability.

19 cl, 10 dwg

 



 

Same patents:

FIELD: machine building.

SUBSTANCE: assembly of connection of fitting and pipe contains polymer union of the fitting, polymer plastic pipe femaling the said union, and polymer shrinkable sleeve femaling the end of the said pipe at the place of the connection with union. At that the pipe is installed on the fitting union by means of its expansion together with the shrinkable sleeve ensuring further shrinkage of the sleeve material, and union is made with three ring shoulders: first of them is located at end of the union, third shoulder is in contact with end face of the end pipe, and second is between the first and third shoulders. Said shoulders have cylindrical face surface. The fitting union has two zones limited by the said shoulders: in the first zone between the first and second shoulders the union has cone shape tapering towards its end, and in second zone located between second and third shoulder has cone shape expanding in this direction. The shrinkable sleeve at one end has two internal shoulders, the first shoulder over the end face is in contact with end face of the pipe end, and the second shoulder with large height in comparison with the first shoulder, over the end face is in contact with the end face of the third shoulder of the union.

EFFECT: increased reliability of the connection of the fitting with pipe.

12 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: group of inventions relates to fitting for pipelines connection. Fitting for pipes connection contains at least first and second pipe elements equipped respectively with the first and second input/output holes, and creating at internal surface the first and second pipelines respectively. The pipe elements are made with possibility of connection with each other such that the first and second pipelines are connected with each other with possibility of mutual fluid transfer, and together create combined pipeline with fitting ensuring the first hole connection with the second hole with possibility of the fluid transfer. The fitting additionally contains at least the first securing device comprising coupling and locking ring; at that the couple is made with possibility of connection to the first pipe element such that surrounds it from external side and creates between the coupling and first pipe element a ring clearance intended to receive the inserted pipe; at that coupling has internal surface looking on the first pipe element, and external surface, and is provided with ring collar projecting from the said external surface, and ring groove in the said internal surface at the ring collar, in it the lock ring is installed. The first securing device operates at least in the insert configuration, when it provides the pipe insertion in the ring clearance, and in securing configuration it reliably and tightly for fluid secures the pipe in the ring clearance.

EFFECT: improved securing.

10 cl, 11 dwg

FIELD: machine building.

SUBSTANCE: connection includes a branch pipe made on a rigid housing of a straight fitting, a thin-wall sleeve with outward flanging on one of the ends, which is located inside the connected pipe end from polymer material so that the flanging is borne against the pipe end, a coupling nut, a clamping sleeve and a sealing ring. The branch pipe has a section of external thread and an internal hole with cylindrical surface, an internal step perpendicular to the axis, as well as an inner conical surface facing a free end of the branch pipe and open on the side of the free end of the branch pipe. The coupling nut has an internal radial annular projection with a conical surface facing inward the cavity of the coupling nut and located along the inner edge of the annular projection. Clamping sleeve 8 is made from metal alloy with a solid shape in the direction of the surfaces that form it and installed so that it is adjacent to outer surface of the pipe end and pipe end 5 is introduced into the material.

EFFECT: higher reliability of the connection.

7 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: first, an initial annular projection of a triangular profile with the width of the base, which is calculated as per the relationship specified in the formula, is formed. Then, it is processed by plastic deformation using a processing tool by means of deformation from its top in the direction perpendicular to the stop surface of the part. The possibility of its elastic recovery is provided to the height equal to 10-60% of the height of initial annular sealing projection after the deforming force is released.

EFFECT: increasing tightness and operating life of a detachable connection.

4 cl, 6 dwg

FIELD: construction.

SUBSTANCE: element of pipeline fittings, capable of connection with polypropylene and metal pipes, comprising a hollow body made of polypropylene with at least one integral element for connection with a polypropylene pipe, a hole in which is open to the body cavity, and also with at least one embedded element in the form of a bushing from a metal alloy, the cavity of which also communicates with the cavity of the body, with a section embedded into the body and a protruding tubular section, at the same time the section of the embedded element installed into the body at the side of the end is made with a circular groove arranged adjacently to the inner surface of the embedded element with inner side cylindrical surfaces, inside of which, being coupled with the bottom, there is a circular element arranged from a sealing solid elastic material, which is compressed under pressure, corresponding to the pressure of body pressing.

EFFECT: provision of the possibility to connect with polypropylene and metal pipes simultaneously, and also increasing reliability of pipeline fittings and their service life due to reduced probability of leaks occurrence.

6 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: group of inventions relates to design of connection head of high pressure pipe for fuel supply in order to avoid clearance between circular ledge and opposite part, by means of substantial installation of pipe length in axial direction of connection head and to obtain sufficient sealing capability, to prevent leak in process of peening with high pressure of at least 300 MPa. Design of connection head of high pressure line for fuel supply comprises, at connection end section of thick-walled steel pipe of small diametre, spherical mount surface, circular ledge, and round conical surface, which passes continuously from mount surface, where orifice and fixture nut are assembled. When thick-walled steel pipe of small diametre has t (wall thickness)/D (external diametre) <0.3, distance L1 in axial direction of pipe from end of connection head to back surface of circular ledge makes from 0.38 D to 0.7 D, radius R of case of spherical mount surface makes from 0.45 D to 0.65 D, and external diametre D1 of circular ledge makes from 1.2 D to 1.4 D, where internal spherical surface of connection head comprises double-stage conical surface, having contour of section in axial direction of steel pipe, which expands to outlet hole of pipe. Version of connection head design is described.

EFFECT: invention improves device reliability.

8 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: facility for connection of parts consists of case of vessel with orifice along perimetre of which there are made collars of contact surfaces of connected parts with packing element between them; further, facility consists of threaded connection fixing connected parts relative to case of vessel. The facility is equipped with an additional flange with a packing element in plane of contacting collar, formed from the side of internal cavity of the vessel case, thus creating pressure tight cavity. A plate joined by threaded connection with the additional flange is installed in this cavity.

EFFECT: firm engagement of connected parts is achieved at applying moderate force for tightening.

1 dwg

FIELD: machine building.

SUBSTANCE: facility for connection of parts consists of case of vessel with orifice along perimetre of which there are made collars of contact surfaces of connected parts with packing element between them; further, facility consists of threaded connection fixing connected parts relative to case of vessel. The facility is equipped with an additional flange with a sealing element in plane of the contact collar, formed from the side of internal cavity of the vessel case, thus creating pressure tight cavity, wherein a plate is installed. With threaded connection the plate is joined to an additional flange. Also surface of the additional flange, facing internal cavity of the vessel case, is spherical.

EFFECT: firm engagement of connected parts is achieved at applying moderate force for tightening.

1 dwg

Pipeline joint // 2386888

FIELD: construction.

SUBSTANCE: pipeline joint includes captive nut, nozzle with inner conical surface, nipple with inner conical surface, band ring with inner conical surface coupled with outer conical surface of nipple, and outer cylindrical surface coupled with inner cylindrical surface of captive nut. Joint comprises stepped bushing with sealing edges arranged in areas of steps rotation surfaces crossing with their end surfaces.

EFFECT: possibility of rational selection of sealing elements parametres depending on materials of joined pipes, their mechanical properties and working pressure in joint, prevention of its spontaneous unsealing, simplified replacement of sealing element and reduction of axial forces in joint tightening.

6 cl, 3 dwg

Connecting device // 2307264

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: invention can be used in lubrication systems of internal combustion engines. Proposed connecting device, mainly used for connecting oil lines, has two plates with outer and inner faces and ends of different configuration connected into integral part by conical nut. Plates, when connected, form through channel with different diameters at ends corresponding to diameters of parts to be connected. Some ends of plates are made in form of ball-shaped sockets for reliable and sealed enclosing of ball head of connected part. Degree of sealing is provided by tightening of conical nut with possibility of its rotation relative to other ends of plates made cone-shaped and provided with external thread.

EFFECT: facilitated assembling and disassembling of parts.

2 dwg

FIELD: joining of pump rods, casing pipes, pump-compressor tubes in oil and gas wells is designed for using in gas-and-oil producing industry.

SUBSTANCE: the joining has screwed ends and coupling boxes. On one end there is a cylindrical turning with a circular groove and a ledge with attached surface. The last one is fulfilled under an angle β to the axle of the joining. Corresponding cylindrical turning with a circular groove and a ledge with attached surface under an angle β to the axle are made on the other end of the joining. The connecting coupling box is fulfilled in the shape of a self-locking bushing with a channel for interacting with the cylindrical turning of the joining ends and retainer sectors. The last are fulfilled with an eccentricity ▵ relatively to the exterior diameter of the bushing for interacting with the circular grooves on the cylindrical turnings and for fixation of the joining in the well.

EFFECT: secures prolongation of exploitation term, reliability of capsulation of the joining.

1 cl, 6 dwg

FIELD: construction.

SUBSTANCE: device comprises connecting sleeve provided with the recess and clamping nut having the first thread. The connecting sleeve is provided with appropriate thread and cut in ring mounted for permitting compression between the wedge-shaped section of the recess wall and piping member when the clamping nut is tightened. The piping joint has auxiliary nut with thread whose direction of screwing corresponds to the direction of the first thread. The clamping nut has the second thread appropriate to the thread of the auxiliary nut.

EFFECT: enhanced reliability.

23 cl, 4 dwg

FIELD: oil industry.

SUBSTANCE: connection comprises coupling with conical thread and recess made in its end face and flexible bushing mounted inside the coupling. The recess is shaped into a cone, and flexible bushing has appropriate conical surface. The inner side of the flexible bushing has entering chamfering, and the opposite side of the bushing is conical. The flexible bushing is mounted so that it occupies the ring space between the pipe surface and the conical surface of the recess and spaces between the hollows and crests of the threaded joint at the thread exit.

EFFECT: enhanced reliability.

3 dwg

Connecting device // 2307264

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: invention can be used in lubrication systems of internal combustion engines. Proposed connecting device, mainly used for connecting oil lines, has two plates with outer and inner faces and ends of different configuration connected into integral part by conical nut. Plates, when connected, form through channel with different diameters at ends corresponding to diameters of parts to be connected. Some ends of plates are made in form of ball-shaped sockets for reliable and sealed enclosing of ball head of connected part. Degree of sealing is provided by tightening of conical nut with possibility of its rotation relative to other ends of plates made cone-shaped and provided with external thread.

EFFECT: facilitated assembling and disassembling of parts.

2 dwg

Pipeline joint // 2386888

FIELD: construction.

SUBSTANCE: pipeline joint includes captive nut, nozzle with inner conical surface, nipple with inner conical surface, band ring with inner conical surface coupled with outer conical surface of nipple, and outer cylindrical surface coupled with inner cylindrical surface of captive nut. Joint comprises stepped bushing with sealing edges arranged in areas of steps rotation surfaces crossing with their end surfaces.

EFFECT: possibility of rational selection of sealing elements parametres depending on materials of joined pipes, their mechanical properties and working pressure in joint, prevention of its spontaneous unsealing, simplified replacement of sealing element and reduction of axial forces in joint tightening.

6 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: facility for connection of parts consists of case of vessel with orifice along perimetre of which there are made collars of contact surfaces of connected parts with packing element between them; further, facility consists of threaded connection fixing connected parts relative to case of vessel. The facility is equipped with an additional flange with a sealing element in plane of the contact collar, formed from the side of internal cavity of the vessel case, thus creating pressure tight cavity, wherein a plate is installed. With threaded connection the plate is joined to an additional flange. Also surface of the additional flange, facing internal cavity of the vessel case, is spherical.

EFFECT: firm engagement of connected parts is achieved at applying moderate force for tightening.

1 dwg

FIELD: machine building.

SUBSTANCE: facility for connection of parts consists of case of vessel with orifice along perimetre of which there are made collars of contact surfaces of connected parts with packing element between them; further, facility consists of threaded connection fixing connected parts relative to case of vessel. The facility is equipped with an additional flange with a packing element in plane of contacting collar, formed from the side of internal cavity of the vessel case, thus creating pressure tight cavity. A plate joined by threaded connection with the additional flange is installed in this cavity.

EFFECT: firm engagement of connected parts is achieved at applying moderate force for tightening.

1 dwg

FIELD: machine building.

SUBSTANCE: group of inventions relates to design of connection head of high pressure pipe for fuel supply in order to avoid clearance between circular ledge and opposite part, by means of substantial installation of pipe length in axial direction of connection head and to obtain sufficient sealing capability, to prevent leak in process of peening with high pressure of at least 300 MPa. Design of connection head of high pressure line for fuel supply comprises, at connection end section of thick-walled steel pipe of small diametre, spherical mount surface, circular ledge, and round conical surface, which passes continuously from mount surface, where orifice and fixture nut are assembled. When thick-walled steel pipe of small diametre has t (wall thickness)/D (external diametre) <0.3, distance L1 in axial direction of pipe from end of connection head to back surface of circular ledge makes from 0.38 D to 0.7 D, radius R of case of spherical mount surface makes from 0.45 D to 0.65 D, and external diametre D1 of circular ledge makes from 1.2 D to 1.4 D, where internal spherical surface of connection head comprises double-stage conical surface, having contour of section in axial direction of steel pipe, which expands to outlet hole of pipe. Version of connection head design is described.

EFFECT: invention improves device reliability.

8 cl, 5 dwg

FIELD: construction.

SUBSTANCE: element of pipeline fittings, capable of connection with polypropylene and metal pipes, comprising a hollow body made of polypropylene with at least one integral element for connection with a polypropylene pipe, a hole in which is open to the body cavity, and also with at least one embedded element in the form of a bushing from a metal alloy, the cavity of which also communicates with the cavity of the body, with a section embedded into the body and a protruding tubular section, at the same time the section of the embedded element installed into the body at the side of the end is made with a circular groove arranged adjacently to the inner surface of the embedded element with inner side cylindrical surfaces, inside of which, being coupled with the bottom, there is a circular element arranged from a sealing solid elastic material, which is compressed under pressure, corresponding to the pressure of body pressing.

EFFECT: provision of the possibility to connect with polypropylene and metal pipes simultaneously, and also increasing reliability of pipeline fittings and their service life due to reduced probability of leaks occurrence.

6 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: first, an initial annular projection of a triangular profile with the width of the base, which is calculated as per the relationship specified in the formula, is formed. Then, it is processed by plastic deformation using a processing tool by means of deformation from its top in the direction perpendicular to the stop surface of the part. The possibility of its elastic recovery is provided to the height equal to 10-60% of the height of initial annular sealing projection after the deforming force is released.

EFFECT: increasing tightness and operating life of a detachable connection.

4 cl, 6 dwg

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