CN210661818U

CN210661818U - Gland type expansion joint

Info

Publication number: CN210661818U
Application number: CN201921393394.6U
Authority: CN
Inventors: 吕增和; 吕增兴
Original assignee: XINGHUA TONGKE MACHINERY CO Ltd
Current assignee: XINGHUA TONGKE MACHINERY CO Ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-06-02
Anticipated expiration: 2029-08-26

Abstract

The utility model provides a gland type expansion joint, which comprises an upper gland, an outer sleeve, a lower gland and a fastening stud, wherein the upper gland comprises a top cover and a first sleeve, and the top cover and the first sleeve have the same inner diameter and are of an integrally formed structure; the lower gland comprises a second sleeve and a bottom cover, the outer sleeve is positioned between the upper gland and the lower gland, and a plurality of grooves are formed in the inner side wall of the outer sleeve; and the groove is provided with a telescopic block. The telescopic block of the utility model can move in the groove in a telescopic way, so that the vibration of the pipe in the telescopic joint during working can be effectively reduced, and the pipeline is protected; the sealing ring can compensate the axial displacement of the pipeline and ensure the high sealing of the pipeline line; the structure is reasonable, the installation is fast and convenient, and the device is particularly suitable for pipelines with vibration or certain inclination.

Description

Gland type expansion joint

Technical Field

The utility model relates to a pipe joint field especially relates to a gland formula expansion joint.

Background

The pipeline is a device connected by pipes, pipe connectors, valves and the like, and the pipeline transportation is a transportation mode for transporting liquid and gas materials for a long distance by using the pipeline as a transportation tool. Because various high-temperature and high-pressure conveying conditions need to be met during pipeline transportation, and the pipeline is easily deformed and twisted due to stress on part of the pipeline, so that the pipeline is damaged, an expansion joint needs to be arranged at the pipeline connection position.

The equipment is connected with the pipeline and the telescopic joint through the bolts to form a whole, the telescopic joint has the main effect of absorbing expansion or contraction of the pipeline caused by temperature change, and the condition that materials in the pipeline are leaked due to bending or cracking of the pipeline can be avoided.

However, the traditional expansion joint is rough in manufacture and often has a plurality of problems: firstly, the structural strength is low, and the bearing pressure is low; secondly, the sealing performance between the pipeline and the interface is poor, so that substances in the pipeline are easy to leak, and potential safety hazards are brought; thirdly, the joint has strong vibration, large noise and short service life when in work; fourthly, the installation consumes long time, the efficiency is low, and the working progress is influenced;

disclosure of Invention

The utility model aims at solving the defects existing in the prior art and providing a gland type expansion joint.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a gland formula expansion joint, including upper gland, outer sleeve, lower gland and holding stud, the upper gland includes top cap and first sleeve, the top cap is hollow ring cylinder, the first sleeve is the cylinder of hollow structure, the top cap is the same with the first sleeve internal diameter and is the integrated into one piece structure; the lower gland comprises a second sleeve and a bottom cover, the lower gland and the upper gland are the same in shape and size, opposite in direction and perpendicular to the outer sleeve. The outer sleeve is a cylinder with a hollow structure and is positioned between the upper gland and the lower gland, and a plurality of grooves are formed in the inner side wall of the outer sleeve; and the groove is provided with a telescopic block, and the shape of the groove is adapted to the telescopic block.

Preferably, the bottom of the groove and the bottom of the telescopic block are connected through a spring.

Preferably, the telescopic block is made of hard rubber materials, and a circular bulge is arranged on the surface, close to the pipeline, of the telescopic block.

Preferably, a first sealing ring is arranged in a gap between the upper gland and the top end of the outer sleeve, and a second sealing ring is arranged in a gap between the lower gland and the bottom end of the outer sleeve; the first sealing ring and the second sealing ring are made of elastic materials.

Preferably, the cross section of the first sealing ring is trapezoidal, and the shorter bottom edge faces the first sleeve; the cross section of the second sealing ring is trapezoidal, and the shorter bottom edge of the second sealing ring faces the second sleeve; the first sealing ring and the second sealing ring are the same in size and shape.

Preferably, go up the gland and have the last screw hole that the round equidistance distributes, the gland has the lower screw hole that the round equidistance distributes down, go up the screw hole with screw hole position one-to-one down.

Preferably, each of the upper threaded holes has one of the fastening studs, and the fastening studs extend through the upper threaded hole and the lower threaded hole.

Preferably, the upper gland and the lower gland are connected through the fastening stud, nuts are externally connected to the positions, exceeding the top cover and the bottom cover, of the fastening stud, and an anti-slip cap is arranged at the top end of the fastening stud.

Preferably, the inner diameter of the first sleeve is larger than the outer diameter of the outer sleeve, and the inner diameter of the second sleeve is larger than the outer diameter of the outer sleeve; the outer sleeve is located inside the first sleeve and the second sleeve.

Compared with the prior art, the beneficial effects of the utility model are that: the telescopic block can move in the groove in a telescopic mode and can prop against the pipeline when extending out, so that connection is tighter; the telescopic block is made of hard rubber materials, so that the vibration of the pipe in the telescopic joint during working can be effectively reduced, and the pipeline is protected; the first sealing ring and the second sealing ring with trapezoidal cross sections are more fit with the shape of a gap when the upper gland and the lower gland are connected with the outer sleeve, and the sealing rings can deform when the pipeline expands with heat and contracts with cold, so that the high sealing of the pipeline line is ensured while the axial displacement of the pipeline is compensated; the telescopic joint has reasonable structure and is fast and convenient to install; the pipeline can be freely stretched in the allowed stretching amount, and the pipeline stretching device is particularly suitable for pipelines with vibration or certain inclination.

Drawings

Fig. 1 is a schematic view of an overall structure of a gland type expansion joint according to embodiment 1 of the present invention;

fig. 2 is a sectional view of a gland type expansion joint at a position a-a according to embodiment 1 of the present invention;

fig. 3 is a schematic view of a groove and an expansion block of a gland type expansion joint according to embodiment 1 of the present invention.

In the figure: 1-pressing a cover; 11-a top cover; 12 a first sleeve; 13-upper threaded hole; 2-an outer sleeve; 21-a first sealing ring; 22-a second sealing ring; 23-lower threaded hole; 24-a groove; 25-a telescopic block; 251-a circular protrusion; 3-pressing the cover; 31-a second sleeve; 32-a bottom cover; 33-lower threaded hole; 4-tightening the stud; 41-antiskid cap.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the present embodiment will be described in detail with reference to fig. 1, 2 and 3.

The utility model provides a gland formula expansion joint, including upper gland 1, outer sleeve 2, lower gland 3 and holding stud 4, upper gland 1 includes top cap 11 and first sleeve 12, top cap 11 is the hollow circular cylinder, first sleeve 12 is the cylinder of hollow structure, top cap 11 and first sleeve 12 internal diameter the same and as an organic whole shaping structure; the lower gland 3 comprises a second sleeve 31 and a bottom cover 32, and the lower gland 3 and the upper gland 1 are the same in shape and size, opposite in direction and perpendicular to the outer sleeve 2.

The outer sleeve 2 is a cylinder with a hollow structure and is positioned between the upper gland 1 and the lower gland 3, the inner side wall of the outer sleeve 2 is provided with a plurality of grooves 24, and the number of the grooves 24 is multiple; and the groove 24 is provided with the telescopic block 25, the shape of the groove 24 is adapted to the shape of the telescopic block 25, and the plurality of grooves 24 and the telescopic blocks 25 disperse the pressure on the pipeline wall and play a role of preventing the pipeline wall from loosening.

Further, spring coupling is passed through to recess 24 bottom and flexible piece 25 bottom, and in the in-service use, flexible piece 25 can stretch out and draw back in recess 24, and when the pipeline inserts expansion joint, flexible piece 25 receives the extrusion withdrawal recess 24 of pipeline, if the pipeline is not hard up or when warping in connecting, one section can be stretched out to flexible piece 25, withstands the pipeline, makes expansion joint and pipe connection inseparabler.

Further, the telescopic block 25 is made of hard rubber materials, the surface of the telescopic block 25, which is close to the pipeline, is provided with a circular protrusion 251, the hard rubber materials are in contact with the pipeline, so that the vibration of the pipe in the telescopic joint during working can be effectively reduced, the pipeline is protected, the friction force between the circular protrusion 251 and the pipe is increased, and the damping effect is enhanced.

Further, a first sealing ring 21 is arranged in a gap between the upper gland 2 and the top end of the outer sleeve 2, and a second sealing ring 22 is arranged in a gap between the lower gland 3 and the bottom end of the outer sleeve 2; the first seal ring 21 and the second seal ring 22 are made of elastic material. The first sealing ring 21 is deformed when being extruded between the upper gland 1 and the outer sleeve 2, so that a better fit clearance is formed, the sealing performance of the expansion joint is enhanced, and the axial displacement generated by the expansion and contraction of the pipe can be properly compensated.

Further, the cross section of the first sealing ring 21 is trapezoidal, and the shorter bottom edge faces the first sleeve 12; the cross section of the second seal ring 22 is trapezoidal, the shorter bottom edge faces the second sleeve 31, and the first seal ring 21 and the second seal ring 22 have the same size and shape. The cross section is trapezoidal and is more attached to the shape of the upper gland 1 and the lower gland 3 when being connected with the outer sleeve, so that a better sealing effect is achieved.

Furthermore, the upper gland 1 is provided with a circle of upper threaded holes 13 distributed at equal intervals, the lower gland is provided with a circle of lower threaded holes 33 distributed at equal intervals, and the positions of the upper threaded holes 13 correspond to the positions of the lower threaded holes 33 one by one.

Further, each upper threaded hole 13 has a fastening stud 4 therein, and the fastening stud 4 extends through the upper threaded hole 13 and the lower threaded hole 33. In practical application, the pipeline is connected with the outer sleeve 2 in an aligned mode, and the annular structure of the top cover 11 and the hexagonal structure of the fastening bolt 4 enable the whole pipeline joint to be firm and high in structural strength, so that the pipe is prevented from being broken due to expansion caused by heat and contraction caused by cold; simultaneously, the annular structure makes the leakproofness of whole pipe good, makes things convenient for the pipeline to correspond and inserts in the joint, prevents the pipeline dislocation, and simple to operate has prolonged expansion joint's life.

Further, the upper gland 1 and the lower gland 3 are connected through a fastening stud 4, nuts are externally connected at the positions, exceeding the top cover 11 and the bottom cover 32, of the fastening stud 4, and an anti-skid cap 41 is arranged at the top end of the fastening stud 4; the expansion joint is made of carbon steel material, so that the strength is high and the structure is stable. The two ends of the fastening stud 4 are both provided with nuts, so that the telescopic joint structure is guaranteed to be firm and tightly connected.

Preferably, the inner diameter of the first sleeve 12 is greater than the outer diameter of the outer sleeve 2, and the inner diameter of the second sleeve 31 is greater than the outer diameter of the outer sleeve 2; the outer sleeve 2 is located inside the first sleeve 12 and the second sleeve 31; the upper gland and the lower gland can move up and down on the outer ring of the outer sleeve 2 to realize the extension of the telescopic joint.

In practical application, the utility model provides a gland formula expansion joint is used for both sides and pipeline flange with the double-screw bolt connection, need not to weld, simple to operate, is on the basis of traditional loose tube expansion joint original performance, add stop device, with two nuts locking in gland formula loose tube spacing expansion joint maximum expansion volume; therefore, the pipeline can be freely stretched in the allowed stretching amount, and once the maximum stretching amount of the gland type loose tube limit telescopic joint is exceeded, the limit is realized, so that the safe operation of the gland type loose tube limit telescopic joint pipeline is effectively ensured, and the pipeline is particularly suitable for pipelines with vibration or certain inclination.

The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, all changes and modifications which do not depart from the spirit and scope of the present invention are deemed to fall within the scope of the present invention.

Claims

1. The utility model provides a gland formula expansion joint which characterized in that: the upper gland comprises a top cover and a first sleeve, the top cover is a hollow circular cylinder, the first sleeve is a cylinder with a hollow structure, and the top cover and the first sleeve have the same inner diameter and are of an integrally formed structure; the lower gland comprises a second sleeve and a bottom cover, the lower gland and the upper gland are same in shape and size, opposite in direction and perpendicular to the outer sleeve;

the outer sleeve is a cylinder with a hollow structure and is positioned between the upper gland and the lower gland, and a plurality of grooves are formed in the inner side wall of the outer sleeve; and the groove is provided with a telescopic block, and the shape of the groove is adapted to the telescopic block.

2. The gland type expansion joint according to claim 1, wherein: the bottom of the groove is connected with the bottom of the telescopic block through a spring.

3. The gland type expansion joint according to claim 2, wherein: the telescopic block is made of hard rubber materials, and a circular bulge is arranged on the surface, close to the pipeline, of the telescopic block.

4. The gland type expansion joint according to claim 1, wherein: a first sealing ring is arranged in a gap between the upper gland and the top end of the outer sleeve, and a second sealing ring is arranged in a gap between the lower gland and the bottom end of the outer sleeve.

5. The gland type expansion joint according to claim 4, wherein: the cross section of the first sealing ring is trapezoidal, and the shorter bottom edge of the first sealing ring faces the first sleeve; the first sealing ring and the second sealing ring are the same in size and shape.

6. The gland type expansion joint according to claim 1, wherein: go up the gland and have last screw hole that round equidistance distributes, the gland has the lower screw hole that round equidistance distributes down, go up the screw hole with screw hole position one-to-one down.

7. The gland type expansion joint according to claim 6, wherein: each upper threaded hole is internally provided with one fastening stud, and the fastening studs penetrate through the upper threaded holes and the lower threaded holes.

8. The gland type expansion joint according to claim 7, wherein: the upper gland and the lower gland are connected through the fastening stud, the fastening stud exceeds the top cover and the bottom cover, the positions of the top cover and the bottom cover are externally connected with nuts, and the top end of the fastening stud is provided with an anti-slip cap.

9. The gland type expansion joint according to claim 1, wherein: the inner diameter of the first sleeve is larger than the outer diameter of the outer sleeve, and the inner diameter of the second sleeve is larger than the outer diameter of the outer sleeve; the outer sleeve is located inside the first sleeve and the second sleeve.