Worm clamp

 

(57) Abstract:

The invention relates to mechanics, more specifically, to machine parts and can be used in the design of the worm drive clamps for clamping flexible hoses. You can use the invention in the design of the worm drive clamps to increase the reliability of the sealing connection of the hose with a nozzle at its outer diameter exceeding 50 mm, installed In the housing of the worm screw. Tape one end fixed in the housing, the other end of which communicates with the screw. On the inner surface of the tape in the area of the body has lining. The lining is designed with sloping punch, exposed their inner edges from it on both sides of the hull on the thickness of the lower part of the body. Punch provided with seats for attachment to the lower end of the tape. In the Central part of the under the hood lining along the axis of symmetry is made with a longitudinal cut, and either end it is provided with legs, the thickness of which the ends are kept to the minimum possible thickness, the width of the lining is made equal to the width of the tape. Proposed such a design of the clamp, which would allow to reduce the force of contraction of the ends of the tape, to create due to this margin of the zone of compression hose pipe to improve the reliability of sealing compounds. 7 Il.

The technical field.

The invention relates to mechanics, and more particularly to machine tools, and can be used in the design of the worm drive clamps for clamping flexible hoses. You can use the invention in the design of the worm drive clamps to increase the reliability of the sealing connection of the hose with a nozzle at its outer diameter exceeding 50 mm

The level of technology.

Famous clip for attaching a flexible hose to a rigid tube, consisting of a wire clamp with double loop, spanning a protracted finger with radial holes, into which are passed the ends of the clamp (patent RF 2079034, CL MKI F 16 L 33/04, 1997). The advantage of the clip is executing him with a double loop in the two girth that allows you to securely compress the joined parts to ensure the integrity of the connection.

The disadvantage of the clip is a small force of contraction, which can be implemented, resulting in insufficient sealing hose (large diameter because the necessary compression force increases in proportion to the diameter of the hose) or by increasing the pressure in the hose.

Known clamp, comprising a housing with worm screw and the ring of the rim end, interacts jumpers with the worm screw engaged in the contraction of both ends of the clamp for clamping a hose that is placed inside the ring (U.S. patent 5787555, CL F 16 L 33/08, publ. 04.08.1998,).

This clamp allows you to develop a greater force of contraction than mentioned above. However, when increasing the diameter of the pinched piping or pressure in the growing effort may not be enough to ensure reliable sealing of the connection. As you know, the sealing connection of the hose with a pipe depends on the pressure P with which the hose is pressed against the nozzle. When the required value of R. the force of contraction of the ends of the tape clamp - F can be determined by the formula:

F=Pdb(0,5+nf),

where F is the force of contraction of the ends of the tape clamp;

P - pressure compression hose;

d - diameter of the hose;

b - the width of the tape;

f - coefficient of friction (similar to static friction) tape clamp on the surface of the hose.

In the known fastener tape options are selected from structural considerations, resulting in the clamp has a large area of contact with the hose that leads to increased efforts are needed tightening to ensure the reliability of sealing compounds. The presence of the slots affects the cross hose, especially for large diameters and high pressures

Known worm clamp, comprising a housing with worm screw and the metal strip in the form of a ring, one end of which is fixed in the housing, and the other upper end is provided with elements helical gear is made in the form of convex jumper with wavy-shaped surfaces (RF patent 2075002, CL F 16 L 33/06, 1997).

In this decision, the tape is cut with the ridges on the upper end, and on the remaining part of the strip has a constant cross-section with a width determined by the need to ensure engagement with the screw. In addition, jumpers due to wolnoobraznosti transverse profile are essentially convex-concave and its bottom surface also perceive pressure from objimage hose. Thus, the aforementioned worm gear clamp has a large area of contact with the hose that leads to an increase in the required effort of pulling the ends of the tape to ensure a reliable sealing of the connection. This leads to reduced reliability clamps, especially for hoses with large diameters and high pressures.

The essence of the invention.

The objective of the invention is to develop the and this reserve force, providing increased reliability. In addition, the clip must ensure the creation of more than one zone compression hose pipe to improve the reliability of sealing of the connection.

According to the invention this object is achieved in that the worm clamp, comprising a housing with worm screw and the metal strip in the form of a ring fixed to one (lower) end of the housing, and the other (upper) end is made transversely-inclined slots with convex ridges interacting with screw screw nut, the lower end of the tape with longitudinal cut extending to the upper end of the tape with the jumpers and made equal in width to the transverse length of the cut, the clamp cushioned, fixed on the bottom surface of the lower end of the tape and is made with inclined punch, located on both sides of the body, a longitudinal cut along the symmetry axis between a punch and come down on the "condition" tabs at its ends.

The invention is illustrated by drawings, in which:

Fig. 1 shows a General view of the upper part of the yoke housing and the worm screw;

Fig 2 is a view in plan on the lining (item 6);

Fig.3 - section a-a of Fig.2;

Fig 4 - section C-C Phi Information confirming the possibility of carrying out the invention.

Worm clamp includes (Fig.1) case 1 with the worm screw 2, the metal strip 3 made in the form of a ring. Tape 3 by its end (bottom) 4 fixed in the housing 1, for example, by welding. The other (upper) end of the 5 tapes made interacting with the screw 2. Worm clamp equipped with a lining 6, installed on the inner surface of the tape in the region of the housing 1. Lining 6 (Fig.2-4) are made with inclined punch 7, projecting their inner edges from it on both sides of the housing 1 on the thickness of the lower part of the body. The punch 7 is equipped with seats for attachment 8 to the lower end of the tape 4. In the Central part under the body 1 pad 6 on the axis of symmetry is made with a longitudinal cutout 10, and at both ends it is provided with legs 9, the thickness of which the ends are reduced to "condition" to the minimum possible thickness for technological reasons - to 0.2-0.3 mm, the width of the lining is made equal to the width of the tape 3, and the width of the cutout 10, and the width of the inclined punch, and the distance between the legs 9 is made equal to the transverse (perpendicular to the ribbon 3) the length of the slots 13 (Fig.6).

The lower end of the tape 4 (Fig.5) equipped with Prodotti 5, made with elements of engagement with the worm (Fig.6). While the cutout 11 divides the tape into two branches 12. The upper end of the tape 5 is made with a transversely-inclined slots 13 and the ridges 14 that interacts with the turns of the worm screw 2. Jumper 14 is convex outward (Fig. 7) by an amount not less than the ribbon thickness and consist of a radial transition 16 flat 17 sites. The edges of the slots and jumpers tape has a flange 15, which pass into the branch 12 and together with them and with elements of the lining 6 components of the two annular surfaces that come in contact with the outer surface of the hose (not shown).

Works worm clamp as follows. The clamp is put on the hose, after which the rotation of the screw, the upper end of the tape 5 is moved relative to the housing, thereby reducing the circumference of the ring and compressing the pipeline.

Due to the presence of jumpers made convex outward longitudinal cutout 11 in the tape and the strip 6 compression hose comes in two circular lines around the edges of the ring, forming two rings of sealing around the perimeter of the pipeline, which ensure a reliable sealing connection with a smaller force of contraction. In addition, since the contact area Le is taiwania. Thus, the clamp made in accordance with the invention, has a high reliability at the expense of the reserve force of contraction, provides improved reliability of the sealing of the connection pipe with pipe that is especially significant when increasing the pipeline diameter (greater than 50 mm) and the increase in pressure in the pipeline.

The production of the worm clamp in accordance with the invention does not cause any difficulties and can be implemented on any known metal-working equipment.

Worm clamp, comprising a housing with worm screw and the metal strip in the form of a ring fixed to one (lower) end of the housing, and the other (upper) end is made transversely-inclined slots with convex ridges interacting with the screw worm, characterized in that the lower end of the tape with longitudinal cut extending to the upper end of the tape with the jumpers and made equal in width to the transverse length of the slots, the clamp cushioned, fixed on the bottom surface of the lower end of the tape and is made with inclined punch located on both sides of the body, longitudinal cut along the symmetry axis between the punch is

 

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