CN220379168U

CN220379168U - Expansion joint of square pipe with internal corners

Info

Publication number: CN220379168U
Application number: CN202321686983.XU
Authority: CN
Inventors: 关海权; 梁健雄
Original assignee: Guangdong Liansu Technology Industrial Co Ltd
Current assignee: Guangdong Liansu Technology Industrial Co Ltd
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2024-01-23
Anticipated expiration: 2033-06-29

Abstract

The utility model relates to a square tube expansion joint with a fillet, which comprises an expansion joint main body, an end cover and a sealing ring, wherein the end cover is detachably connected with the expansion joint main body, one end of the expansion joint main body, which is connected with the end cover, is provided with a sealing ring fixing cavity for accommodating the sealing ring, when the sealing ring is positioned in the sealing ring fixing cavity, the sealing ring is abutted with the end cover, the sealing ring is rectangular and annular, four corners of the sealing ring are provided with fillets for fitting the shape of a pipe, both ends of the fillets are provided with bulges, the bulges are positioned on tangent lines of the ends of the fillets, the sealing ring fixing cavity comprises a limiting cavity, and the bulges are positioned in the limiting cavity. According to the scheme, the sealing ring with the fillets is arranged in the expansion joint, so that the shape of the sealing ring is more attached to the fillets square pipe, the fillets on the sealing ring are provided with the protrusions, and the torque for tightly attaching the sealing ring to the pipe can be generated under the action of self-tension force at the fillets of the sealing ring, so that the sealing ring can be tightly attached to the pipe, and effective sealing between the pipe and the expansion joint is achieved.

Description

Expansion joint of square pipe with internal corners

Technical Field

The utility model relates to the technical field of expansion joints, in particular to a fillet square tube expansion joint.

Background

Under the temperature change, the UPVC square pipeline system in the water falling pipeline can generate certain expansion deformation, and a certain number of expansion joints are required to be arranged in the system to ensure that the system is not damaged by the expansion stress, so that the pipeline system has deformation expansion quantity, and the effect of protecting the pipeline is achieved. The existing telescopic joint is sealed by arranging an elastic annular sealing ring inside a pipe socket to seal the gap between the socket and the outer wall of the pipe, thereby realizing sealing. However, due to the special structural shape of the fillet square tube, when the annular sealing ring is sleeved on the outer wall of the square tube, the sealing ring can be kept straight at the fillet position of the square tube due to the action of self-elasticity, so that the sealing ring cannot be self-attached to the fillet position of the tube, the sealing ring is tightly pressed against the surface of the attached tube by the tube wall of the tube in the prior art, but due to manufacturing tolerances of the tube and the tube, particularly at sharp corners on two sides of the fillet of the tube, the partial sealing ring cannot be attached to the tube, and effective sealing cannot be realized.

Disclosure of Invention

The utility model provides a fillet square pipe expansion joint, which aims to solve the problem that in the prior art, a sealing ring can be kept straightened under the action of self elastic force, so that the sealing ring cannot be attached to the fillet position of a pipe, and effective sealing between the expansion joint and the fillet square pipe cannot be realized. The sealing gasket that sets up in this scheme can closely laminate with the fillet side pipe, and then can realize the effective seal between fillet side pipe and the telescopic joint.

The technical scheme adopted by the utility model is as follows: the utility model provides a fillet side pipe telescopic joint, including telescopic joint main part, end cover and sealing washer, the end cover can dismantle with the telescopic joint main part and be connected, the one end that is connected with the end cover is equipped with the fixed chamber of sealing washer that is used for holding the sealing washer in the telescopic joint main part, when the sealing washer is located the fixed intracavity of sealing washer, sealing washer and end cover butt, the sealing washer is the rectangle cyclic annular and its four angles are equipped with the fillet and are used for laminating tubular product shape, the both ends of fillet all are equipped with the arch, the arch is located the tangent line of fillet tip, the fixed chamber of sealing washer includes spacing chamber, the arch is located spacing intracavity.

When the telescopic joint is used, the sealing ring is arranged in the sealing ring fixing cavity in the telescopic joint main body, then the end cover is arranged in the telescopic joint main body, and the sealing ring is abutted with the end cover to prevent the sealing ring from moving. Then the pipe passes through the end cover and the sealing ring and is inserted into the telescopic joint main body, at the moment, the inner ring of the sealing ring is attached to the outer side wall of the pipe, and the outer ring of the sealing ring is attached to the inner cavity of the telescopic joint main body. However, as the pipe is a square pipe with a fillet, the sealing ring is sleeved on the pipe and has an inward shrinkage pulling force after being stretched, and the manufacturing tolerance of the sealing ring and the pipe exists, so that the fillet of the sealing ring cannot be tightly attached to the fillet of the pipe. The outer side walls of the two ends of the fillet of the sealing ring are provided with bulges which are positioned on tangents of the two ends of the fillet. The sealing ring is stretched by the pipe and then the bulge has a tendency of changing positions, but the bulge is fixed by the limiting cavity, the inner side wall of the limiting cavity can apply a force to the bulge to prevent the bulge from changing positions, the bulge is not in a line due to the force from the inner wall of the limiting cavity and the shrinkage pulling force of the sealing ring, so that a torque is generated at the end point of the inner fillet, and the torque acts on the inner fillet of the sealing ring to enable the inner fillet of the sealing ring to be attached to the direction of the pipe, so that the sealing ring can be tightly attached to the pipe, and further effective sealing between the pipe and an expansion joint is achieved.

According to the scheme, the sealing ring is arranged in the expansion joint, the fillets are arranged at the four corners of the sealing ring, so that the shape of the sealing ring is more fit with the fillets square pipe, the protrusions are arranged at the fillets of the sealing ring, the protrusions can generate torque for tightly fitting the sealing ring with the pipe under the action of self-tension force at the fillets of the sealing ring, the fillets of the sealing ring can be tightly fitted with the fillets of the pipe, gaps between the pipe and the sealing ring are avoided at the fillets of the pipe, and effective sealing between the pipe and the expansion joint is achieved.

Preferably, the sealing ring further comprises a compression rib, and the compression rib is arranged around the outer side wall of the sealing ring in an end-to-end mode. The compression ribs are arranged in a plurality of linear arrays on the sealing ring along the axial direction of the inner cavity of the sealing ring. Because tubular product can produce deformation after the temperature change, set up the compression muscle on the sealing washer, the compression muscle can produce the space at sealing washer lateral wall and sealing washer fixer inside wall, has the space of deformation after tubular product or sealing washer thermal expansion, avoids tubular product or sealing washer thermal expansion back not having the direct extrusion telescopic joint of space of deformation, leads to the condition that breaks the telescopic joint to appear. The compression muscle has a plurality of, not only can provide more sufficient space between sealing washer and telescopic joint, can also further strengthen the leakproofness between sealing washer and the telescopic joint.

Preferably, the side wall of the inner cavity of the sealing ring is provided with a lip edge, and one end of the lip edge, which is close to the sealing ring, is closer to the end cover than one end of the lip edge, which is far away from the sealing ring. The lips include a first lip and a second lip, the first lip being closer to the end cap than the second lip, an end of the second lip distal from the seal ring being closer to the axis of the seal ring cavity than an end of the first lip distal from the seal ring. The side wall of the inner cavity of the sealing ring is provided with the lip edge, the lip edge can enable the sealing ring to be tightly attached to the outer side wall of the pipe, the sealing performance between the sealing ring and the pipe is further improved, and then the pipe and the expansion joint are effectively sealed. The end, close to the sealing ring, of the lip edge is closer to the end cover than the end, far away from the sealing ring, of the lip edge, so that the pipe is firstly abutted with the end, close to the sealing ring, of the lip edge when passing through the sealing ring, the lip edge has smaller forward resistance to the pipe, and the pipe can smoothly pass through the lip edge. The first lip has a smaller interference than the second lip, the first lip acts to seal and locate the pipe, and the second lip acts to further increase the tightness.

Preferably, the sealing ring is a rubber sealing ring. The sealing ring is made of rubber, and the rubber has good tensile strength and rebound resilience and is low in wear-resisting cost.

Preferably, a through groove is formed in the side wall of the telescopic joint main body, and a transparent plate is arranged in the through groove and used for observing the length of the inner cavity of the inserted telescopic joint. The side wall of the telescopic joint main body is also provided with scales, and the scales are close to the transparent plate in the through groove. Be provided with the transparent plate on the lateral wall of telescopic joint main part, constructor can observe the length that the tubular product stretches into the telescopic joint through the transparent plate when connecting telescopic joint and tubular product, avoid the tubular product to excessively stretch into the telescopic joint inner chamber, do not provide the surplus that thermal expansion leads to the tubular product to extend for the tubular product and make the tubular product to prop broken the telescopic joint after thermal expansion, also can avoid the tubular product to stretch into the length of telescopic joint inner chamber not enough simultaneously and make the tubular product break away from the telescopic joint after the shrink of cooling. The pipe is further provided with a scale, the scale is an air temperature reference scale, constructors can insert the pipe into the telescopic joint according to the temperature during construction, and the pipe is more convenient and standard during construction.

Preferably, the end cover is provided with a clamping groove, the telescopic joint main body is provided with a limiting protrusion, and when the end cover is connected with the telescopic joint main body, the limiting protrusion is positioned in the clamping groove. Limiting protrusions are arranged on the four side walls of the telescopic joint main body, and clamping grooves for clamping the limiting protrusions are arranged on the four side walls of the end cover. The end cover is connected with the telescopic joint body in a clamping manner, and the connection manner is simple and convenient. Four lateral walls of the end cover are all provided with limiting grooves, and when the telescopic joint is installed, four faces of the end cover are clamped with the telescopic joint main body, so that the connection strength between the end cover and the telescopic joint main body is further improved.

Compared with the prior art, the utility model has the beneficial effects that: according to the scheme, the inner corners of the sealing rings are provided with fillets, protrusions are arranged at the fillets, the outer side walls of the sealing rings are provided with compression ribs, the inner side walls are provided with lips, the fillets of the sealing rings can be tightly attached to the fillets of the pipes, the inner side walls of the sealing rings can be tightly attached to the pipes, the outer side walls of the sealing rings can be tightly attached to the main bodies of the expansion joints, and deformation gaps for the sealing rings or the pipes to expand due to heating are further formed between the sealing rings and the expansion joints. The transparent window and the scales are arranged on the telescopic joint main body, constructors can observe the length of the pipe inserted into the telescopic joint main body through the transparent window, and can insert the pipe into the telescopic joint according to the temperature during construction on the appropriate scales, so that the telescopic joint is more convenient and standard during construction.

Drawings

FIG. 1 is a schematic view of the structure of a square pipe expansion joint with a fillet;

FIG. 2 is a schematic view of the seal ring of the square pipe expansion joint with a fillet;

FIG. 3 is a schematic view of the structure of the telescopic joint body of the telescopic joint of the square tube with a fillet;

FIG. 4 is a cross-sectional view of a sealing ring of a square tube expansion joint with a fillet;

FIG. 5 is a schematic view of another angle of the telescopic joint body of a square tube telescopic joint according to the present utility model.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for better illustration of the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the actual product size; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.

The same or similar reference numerals in the drawings of the embodiments of the present utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are orientations or positional relationships indicated by terms "upper", "lower", "left", "right", "long", "short", etc., based on the orientations or positional relationships shown in the drawings, this is merely for convenience in describing the present utility model and simplifying the description, and is not an indication or suggestion that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and are not to be construed as limitations of the present patent, and that it is possible for those of ordinary skill in the art to understand the specific meaning of the terms described above according to specific circumstances.

The technical scheme of the utility model is further specifically described by the following specific embodiments with reference to the accompanying drawings:

example 1

As shown in fig. 1-3, an embodiment 1 of a square pipe expansion joint with a fillet is shown, which comprises an expansion joint main body 1, an end cover 2 and a sealing ring 3, wherein the end cover 2 is detachably connected with the expansion joint main body 1, one end of the expansion joint main body 1 connected with the end cover 2 is provided with a sealing ring fixing cavity 101 for accommodating the sealing ring 3, when the sealing ring 3 is positioned in the sealing ring fixing cavity 101, the sealing ring 3 is abutted with the end cover 2, the sealing ring 3 is rectangular and annular, the fillet 301 is arranged on the four corners of the sealing ring and is used for fitting a pipe shape, two ends of the fillet 301 are respectively provided with a bulge 302, the bulge 302 is positioned on a tangent line of the end part of the fillet 301, the sealing ring fixing cavity 101 comprises a limiting cavity 111, and the bulge 302 is positioned in the limiting cavity 111.

The working principle or working process of the embodiment: when the telescopic joint is used, the sealing ring 3 is installed in the sealing ring fixing cavity 101 on the telescopic joint main body 1, then the end cover 2 is installed on the telescopic joint main body 1, and the sealing ring 3 is abutted with the end cover 2 to prevent the sealing ring 3 from moving. Then tubular product passes end cover 2 and sealing washer 3 and inserts in the telescopic joint main part 1, and the inner circle of sealing washer 3 is laminated with the lateral wall of tubular product this moment, and the outer lane of sealing washer 3 is laminated with the inner chamber of telescopic joint main part 1. But the sealing ring 3 is sleeved on the pipe and has an inward contraction pulling force after being stretched, and the manufacturing tolerance of the sealing ring 3 and the pipe exists, so that the inner corners of the sealing ring cannot be tightly attached to the inner corners of the pipe. Protrusions 302 are provided on the outer sidewalls of both ends of the fillet of the gasket, the protrusions 302 being located on the tangent lines of both ends of the fillet 301. The bulge 302 has a tendency to change positions after the sealing ring 3 is stretched by the pipe, but the bulge 302 is fixed by the limiting cavity 111, the inner side wall of the limiting cavity 111 can apply a force to the bulge 302 to prevent the bulge 302 from changing positions, the bulge 302 receives a force from the inner wall of the limiting cavity 111 and the shrinkage pulling force of the sealing ring 3 are not in the same line, a torque is generated at the end point of the inner circular bead 301, and the torque acts on the inner circular bead 301 to enable the inner circular bead 301 to be attached to the pipe in the direction of the pipe, so that the sealing ring 3 is tightly attached to the pipe.

The beneficial effects of this embodiment are: according to the scheme, the sealing ring 3 is arranged in the expansion joint, the fillets 301 are arranged at the four corners of the sealing ring 3, so that the shape of the sealing ring 3 is more fit with a pipe, the protrusions 302 are arranged at the fillets 301 on the sealing ring 3, the protrusions 302 can generate torque which enables the sealing ring 3 to be tightly fit with the pipe under the action of self-tension force at the fillets 301 of the sealing ring 3, the fillets 301 of the sealing ring 3 can be tightly fit with the fillets 301 of the pipe, gaps between the pipe and the sealing ring 3 are avoided at the fillets of the pipe, and effective sealing between the pipe and the expansion joint is achieved.

Example 2

An embodiment 2 of the fillet square pipe expansion joint, as shown in fig. 2 and 4, further defines the structure of the seal ring 3 on the basis of the embodiment 1.

Specifically, the sealing ring further comprises a compression rib 4, and the compression rib 4 is arranged around the outer side wall of the sealing ring 3 in an end-to-end mode. The number of the compression ribs 4 is three, and the three compression ribs 4 are linearly arrayed on the sealing ring 3 along the axial direction of the inner cavity of the sealing ring 3.

Specifically, the side wall of the inner cavity of the sealing ring 3 is provided with a lip edge, and one end, close to the sealing ring 3, of the lip edge is closer to the end cover 2 than one end, far away from the sealing ring 3, of the lip edge. The lips comprise a first lip 5 and a second lip 6, the first lip 5 being closer to the end cap 2 than the second lip 6, the end of the second lip 6 remote from the seal ring 3 being closer to the axis of the internal cavity of the seal ring 3 than the end of the first lip 5 remote from the seal ring 3.

Specifically, the sealing ring 3 is a rubber sealing ring 3.

The beneficial effects of this embodiment are: the compression rib 4 is arranged on the sealing ring 3, and the compression rib 4 can generate gaps on the side wall of the sealing ring 3 and the inner side wall of the fixer of the sealing ring 3, so that the pipe or the sealing ring 3 is provided with a deformed space after being heated and expanded, and the situation that the expansion joint is broken due to the fact that the pipe or the sealing ring 3 is directly extruded by the deformed space after being heated and expanded is avoided. The number of the compression ribs 4 is three, so that more sufficient gaps can be provided between the sealing ring 3 and the expansion joint, and the tightness between the sealing ring 3 and the expansion joint can be further enhanced. The lip edge is arranged on the side wall of the inner cavity of the sealing ring 3, the lip edge can enable the sealing ring 3 to be tightly attached to the outer side wall of the pipe, the sealing performance between the sealing ring 3 and the pipe is further improved, and then the pipe and the expansion joint are effectively sealed. The lip edge can enable the sealing ring 3 to be tightly attached to the outer side wall of the pipe, the sealing performance between the sealing ring 3 and the pipe is further improved, and then the pipe and the expansion joint are effectively sealed. Wherein the first lip 5 acts to seal and locate the tubing and the second lip 6 acts to further increase the tightness.

Example 3

Embodiment 3 of the fillet square pipe expansion joint, as shown in fig. 1 and 5, the structures of the expansion joint main body 1 and the end cap 2 are further defined on the basis of embodiment 1 or embodiment 2.

Specifically, a through groove is formed in the side wall of the telescopic joint main body 1, and a transparent plate 7 is arranged in the through groove for observing the length of the inner cavity of the telescopic joint. The side wall of the telescopic joint main body 1 is also provided with scales 8, and the scales 8 are close to the transparent plate 7 in the through groove.

Specifically, the end cover 2 is provided with a clamping groove 201, the telescopic joint main body 1 is provided with a limiting protrusion 102, and when the end cover 2 is connected with the telescopic joint main body 1, the limiting protrusion 102 is positioned in the clamping groove 201. Limiting protrusions 102 are arranged on four side walls of the telescopic joint main body 1, and clamping grooves 201 used for clamping the limiting protrusions 102 are arranged on four side walls of the end cover 2.

The beneficial effects of this embodiment are: be provided with transparent plate 7 on telescopic joint main part 1's lateral wall, constructor can observe the length that tubular product stretched into the telescopic joint through transparent plate 7 when connecting telescopic joint and tubular product, avoid the tubular product to excessively stretch into the telescopic joint inner chamber, do not provide the surplus that thermal expansion leads to tubular product extension for tubular product and make the tubular product to break through the telescopic joint after thermal expansion, also can avoid simultaneously that the tubular product stretches into the length of telescopic joint inner chamber not enough so that the tubular product breaks away from the telescopic joint after the shrink of cooling. The scale 8 is also arranged, the scale 8 is an air temperature reference scale 8, constructors can insert the pipe into the expansion joint on the proper scale 8 according to the temperature during construction, and the construction is more convenient and standard. The end cover 2 and the telescopic joint main body 1 are connected in a clamping manner, and the connection manner is simple and convenient. Four lateral walls of the end cover 2 are provided with limiting grooves, and when the telescopic joint is installed, four faces of the end cover 2 are clamped with the telescopic joint main body 1, so that the connection strength between the end cover 2 and the telescopic joint main body 1 is further improved.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The utility model provides a fillet side pipe telescopic joint, its characterized in that, including telescopic joint main part (1), end cover (2) and sealing washer (3), end cover (2) with telescopic joint main part (1) can dismantle the connection, telescopic joint main part (1) go up with the one end that end cover (2) is connected is equipped with and is used for holding sealing washer fixed chamber (101) of sealing washer (3), works as sealing washer (3) are located when sealing washer fixed chamber (101), sealing washer (3) with end cover (2) butt, sealing washer (3) are rectangular ring shape and its four corners are equipped with fillet (301) and are used for laminating interior tubular product, the both ends of fillet (301) all are equipped with arch (302), arch (302) are located on the tangent line of fillet (301) tip, sealing washer fixed chamber (101) are including spacing chamber (111), arch (302) are located in spacing chamber (111).

2. A fillet square pipe expansion joint according to claim 1, further comprising a compression bead (4), the compression bead (4) surrounding the outer side wall of the seal ring (3) end to end.

3. The inner corner square tube expansion joint according to claim 2, wherein a plurality of compression ribs (4) are arranged on the sealing ring (3) in a linear array along the axial direction of the inner cavity of the sealing ring (3).

4. A fillet square pipe expansion joint according to claim 1, wherein the side wall of the inner cavity of the sealing ring (3) is provided with a lip, and the end of the lip near the sealing ring (3) is closer to the end cap (2) than the end of the lip far from the sealing ring (3).

5. A fillet pipe expansion joint according to claim 4, wherein the lips comprise a first lip (5) and a second lip (6), the first lip (5) being closer to the end cap (2) than the second lip (6), the end of the second lip (6) remote from the sealing ring (3) being closer to the axis of the bore of the sealing ring (3) than the end of the first lip (5) remote from the sealing ring (3).

6. The fillet square tube expansion joint according to any one of claims 1-5, wherein the sealing ring (3) is a rubber sealing ring (3).

7. A fillet square tube expansion joint according to claim 1, wherein the side wall of the expansion joint main body (1) is provided with a through groove, and the transparent plate (7) in the through groove is used for observing the length of the inserted expansion joint inner cavity.

8. The inner corner square tube expansion joint according to claim 7, wherein the side wall of the expansion joint main body (1) is further provided with scales (8), and the scales (8) are close to the transparent plate (7) in the through groove.

9. The inner corner square tube expansion joint according to claim 1, wherein the end cover (2) is provided with a clamping groove (201), the expansion joint main body (1) is provided with a limiting protrusion (102), and when the end cover (2) is connected with the expansion joint main body (1), the limiting protrusion (102) is located in the clamping groove (201).

10. The inner corner square tube expansion joint according to claim 9, wherein limit protrusions (102) are arranged on four side walls of the expansion joint main body (1), and clamping grooves (201) for clamping the limit protrusions (102) are arranged on four side walls of the end cover (2).