A double-flange limiting expansion joint

Abstract

This utility model relates to the field of pipeline connection technology and discloses a double-flange limiting expansion joint, including a first connecting assembly, a second connecting assembly, and an expansion structure. The first and second connecting assemblies are connected by the expansion structure. The first connecting assembly includes a first pipe joint, and the second connecting assembly includes a second pipe joint. The expansion structure includes a slide groove, a guide rail, a threaded seat, a fixing block, a third sealing ring, and a fourth sealing ring. The second pipe joint is slidably connected to the first pipe joint through the slide groove, the guide rail, and the threaded seat has an internal threaded screw installed. The end of the screw is rotatably connected to the fixing block. The third sealing ring is fitted to the end of the second pipe joint that extends into the first pipe joint, and the fourth sealing ring is fitted to the end of the first pipe joint away from the first flange. This utility model utilizes the threaded engagement between the screw and the threaded seat to push the fixing block to move, thereby driving the second pipe joint to move, adapting to the length changes of the pipeline caused by thermal expansion and contraction, foundation settlement, etc.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection technology, and in particular to a double-flange limiting expansion joint. Background Technology

[0002] Double-flange limiting expansion joints are mechanical components used for pipeline connection and compensation. They typically consist of flanges at both ends, an expansion tube body, and a limiting device. Connected to the pipeline via the flanges, they can perform axial expansion and angular adjustment within a certain range to absorb pipeline displacement caused by temperature changes, foundation settlement, or assembly errors. At the same time, the limiting structure can control the amount of expansion and contraction, preventing connection failure due to excessive displacement. They are widely used in pipeline systems for water supply and drainage, petroleum, chemical, and power industries.

[0003] In existing technologies, pipeline connections lack precise and controllable expansion and contraction capabilities when dealing with length changes caused by thermal expansion and contraction, foundation settlement, etc., making it difficult to achieve effective displacement compensation. This leads to pipeline damage due to stress concentration, significantly reducing the adaptability of the pipeline system during installation and maintenance. Utility Model Content

[0004] In view of the fact that the existing pipeline connections lack precise and controllable expansion and contraction capabilities when dealing with length changes caused by thermal expansion and contraction, foundation settlement, etc., and are difficult to achieve effective displacement compensation, resulting in pipeline damage due to stress concentration, and significantly reducing the adaptability of the pipeline system during installation and maintenance, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a double-flange limiting expansion joint, comprising a first connecting component, a second connecting component, and an expansion structure. The first connecting component and the second connecting component are connected by the expansion structure. The first connecting component includes a first pipe joint, and the second connecting component includes a second pipe joint. The expansion structure includes a slide groove, a guide rail, a threaded seat, a fixing block, a third sealing ring, and a fourth sealing ring. The second pipe joint is slidably connected to the first pipe joint through the slide groove, the guide rail, and the threaded seat has an internal threaded screw installed. The end of the screw is rotatably connected to the fixing block. The third sealing ring is fitted to one end of the second pipe joint that extends into the first pipe joint, and the fourth sealing ring is fitted to the end of the first pipe joint that is away from the first flange.

[0006] As a preferred embodiment of the double-flange limiting expansion joint of this utility model, the first connecting component includes a first pipe joint and a first sealing ring, a first flange is fixedly installed on the outer wall of one end of the first pipe joint, and first connecting holes are provided at equal intervals on the first flange.

[0007] As a preferred embodiment of the double-flange limiting expansion joint of this utility model, the end of the first flange is provided with a first mounting groove, the first mounting groove and the first flange are on the same side, the first sealing ring is installed inside the first mounting groove, and a portion of the first sealing ring protrudes from the end of the first pipe joint.

[0008] As a preferred embodiment of the double-flange limiting expansion joint of this utility model, the second connecting component includes a second pipe joint and a second sealing ring. The second pipe joint extends into the interior of the first pipe joint. A second flange is fixedly installed on the outer wall of the end of the second pipe joint away from the first pipe joint. Second connecting holes are provided at equal intervals on the second flange.

[0009] As a preferred embodiment of the double-flange limiting expansion joint of this utility model, the end of the second flange is provided with a second mounting groove, the second mounting groove and the second flange are on the same side, the second sealing ring is installed inside the second mounting groove, and a portion of the second sealing ring protrudes from the end of the second flange.

[0010] In a preferred embodiment of the double-flange limiting expansion joint of this utility model, the sliding groove is symmetrically arranged on the inner wall of the first pipe joint, and the guide rail is symmetrically fixedly installed on the outer wall of the second pipe joint, with the guide rail extending into the sliding groove.

[0011] In a preferred embodiment of the double-flange limiting expansion joint of this utility model, the threaded seat is fixedly installed on the outer wall of the first pipe joint, the fixing block is fixedly installed on the outer wall of the second pipe joint, the threaded seat and the fixing block are arranged opposite to each other, and a turntable is fixedly installed at the end of the screw away from the fixing block.

[0012] The beneficial effects of this utility model are:

[0013] 1. Through the set telescopic structure, the screw and the threaded seat are used to push the fixed block to move, which in turn drives the second pipe joint to move. With the sliding guidance of the guide rail and the slide groove, the relative displacement between the two pipe joints can be accurately realized. The telescopic stroke can be effectively limited and controlled, so that the joint can flexibly adapt to the length changes of the pipeline caused by thermal expansion and contraction, foundation settlement, etc., ensuring the stability of the pipeline connection. The displacement compensation during pipeline operation provides a reliable adjustment method. The operation is convenient and the adjustment accuracy is high.

[0014] 2. By installing the first and second sealing rings in the first and second mounting grooves respectively, the sealing of the connection between the flange and the external pipeline is effectively guaranteed. The third sealing ring seals the end of the second pipe joint that extends into the first pipe joint, and the fourth sealing ring seals the end of the first pipe joint that is away from the first flange. The multiple sealing effects work together to effectively prevent leakage of the medium in the pipeline and ensure the safety and sealing of the pipeline system. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the first sealing ring and the second sealing ring of this utility model;

[0018] Figure 3 This is a schematic diagram of the first connecting component of this utility model;

[0019] Figure 4 This is a schematic diagram of the second connecting component of this utility model;

[0020] Figure 5 This is a schematic diagram of the third sealing ring of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. First connecting assembly; 101. First pipe fitting; 102. First flange; 103. First connecting hole; 104. First mounting groove; 105. First sealing ring; 2. Second connecting assembly; 201. Second pipe fitting; 202. Second flange; 203. Second connecting hole; 204. Second mounting groove; 205. Second sealing ring; 3. Telescopic structure; 301. Slide groove; 302. Guide rail; 303. Threaded seat; 304. Fixing block; 305. Screw; 306. Turntable; 307. Third sealing ring; 308. Fourth sealing ring. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example

[0024] Refer to attached figure Figure 1- Appendix Figure 5 This utility model provides a double-flange limiting expansion joint, including a first connecting component 1, a second connecting component 2, and an expansion structure 3. The first connecting component 1 and the second connecting component 2 are connected by the expansion structure 3. The first connecting component 1 includes a first pipe joint 101 and a first sealing ring 105. A first flange 102 is fixedly installed on the outer wall of one end of the first pipe joint 101. The first flange 102 is provided with six first connecting holes 103 at equal intervals. A first mounting groove 104 is provided at the end of the first flange 102. The first mounting groove 104 and the first flange 102 are on the same side. The first sealing ring 105 is installed inside the first mounting groove 104, and a portion of the first sealing ring 105 protrudes from the end of the first pipe joint 101.

[0025] The second connecting assembly 2 includes a second pipe connector 201 and a second sealing ring 205. The second pipe connector 201 extends into the interior of the first pipe connector 101. A second flange 202 is fixedly installed on the outer wall of the end of the second pipe connector 201 away from the first pipe connector 101. The second flange 202 is provided with six second connecting holes 203 at equal intervals. A second mounting groove 204 is provided at the end of the second flange 202. The second mounting groove 204 and the second flange 202 are on the same side. The second sealing ring 205 is installed inside the second mounting groove 204, and a portion of the second sealing ring 205 protrudes from the end of the second flange 202.

[0026] The telescopic structure 3 includes a slide groove 301, a guide rail 302, a threaded seat 303, a fixing block 304, a third sealing ring 307, and a fourth sealing ring 308. The slide groove 301 is symmetrically arranged on the inner wall of the first pipe joint 101. The guide rail 302 is symmetrically fixedly installed on the outer wall of the second pipe joint 201. The guide rail 302 extends into the slide groove 301, and the guide rail 302 and the slide groove 301 are slidably connected. The threaded seat 303 is fixedly installed on the outer wall of the first pipe joint 101, and the fixing block 304 is fixedly installed on the outer wall of the second pipe joint 201. The threaded seat 303 and the fixing block 304 are connected in a sliding connection. 04. In a relative arrangement, the threaded seat 303 is internally threaded with a screw 305. The end of the screw 305 is rotatably connected to the fixing block 304. The end of the screw 305 away from the fixing block 304 is fixedly mounted with a turntable 306. The third sealing ring 307 is attached to the end of the second pipe joint 201 that extends into the first pipe joint 101. The fourth sealing ring 308 is attached to the end of the first pipe joint 101 away from the first flange 102. The end of the second pipe joint 201 is sealed by the third sealing ring 307, and the end of the first pipe joint 101 is sealed by the fourth sealing ring 308.

[0027] During use, when the double-flange limiting expansion joint is working, the two end pipes are connected to the first pipe joint 101 and the second pipe joint 201 respectively through the first flange 102 and the second flange 202. The second pipe joint 201 extends into the first pipe joint 101. Rotating the turntable 306 drives the screw 305 to rotate. The screw 305 rotates within the threaded seat 303, pushing the fixed block 304 to move, thereby moving the second pipe joint 201. With the sliding cooperation of the guide rail 302 and the slide groove 301, the relative displacement between the two pipe joints is realized, which can adjust the expansion stroke. Limiting and adjusting the pipe length to accommodate changes caused by thermal expansion and contraction, foundation settlement, etc. At the same time, the first sealing ring 105 is installed in the first mounting groove 104, the second sealing ring 205 is installed in the second mounting groove 204 to ensure the sealing of the flange connection with the external pipe. The third sealing ring 307 seals the end of the second pipe joint 201 that extends into the first pipe joint 101, and the fourth sealing ring 308 seals the end of the first pipe joint 101 that is away from the first flange 102 to prevent leakage of the medium in the pipe. Through structural coordination, the functions of expansion and contraction compensation and sealing and leak prevention in the pipe connection are achieved.

[0028] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A double flanged limited expansion joint characterized by: The system includes a first connecting component (1), a second connecting component (2), and a telescopic structure (3). The first connecting component (1) and the second connecting component (2) are connected by the telescopic structure (3). The first connecting component (1) includes a first pipe fitting (101), and the second connecting component (2) includes a second pipe fitting (201). The telescopic structure (3) includes a slide groove (301), a guide rail (302), a threaded seat (303), a fixing block (304), a third sealing ring (307), and a fourth sealing ring (308). The second pipe joint (201) is slidably connected to the first pipe joint (101) via a groove (301), a guide rail (302), and an internal threaded screw (305) on the threaded seat (303). The end of the screw (305) is rotatably connected to the fixing block (304). The third sealing ring (307) is attached to one end of the second pipe joint (201) that extends into the first pipe joint (101). The fourth sealing ring (308) is attached to one end of the first pipe joint (101) that is away from the first flange (102).

2. The dual flange limited expansion joint of claim 1, wherein: The first connecting assembly (1) includes a first pipe joint (101) and a first sealing ring (105). A first flange (102) is fixedly installed on the outer wall of one end of the first pipe joint (101). The first flange (102) is provided with first connecting holes (103) at equal intervals.

3. The dual flange limited expansion joint of claim 2, wherein: The first flange (102) has a first mounting groove (104) at its end. The first mounting groove (104) and the first flange (102) are on the same side. The first sealing ring (105) is installed inside the first mounting groove (104), and a portion of the first sealing ring (105) protrudes from the end of the first pipe joint (101).

4. The dual flange limited expansion joint of claim 1, wherein: The second connecting assembly (2) includes a second pipe joint (201) and a second sealing ring (205). The second pipe joint (201) extends into the interior of the first pipe joint (101). A second flange (202) is fixedly installed on the outer wall of the end of the second pipe joint (201) away from the first pipe joint (101). The second flange (202) is provided with second connecting holes (203) at equal intervals.

5. The dual flange limited expansion joint of claim 4, wherein: The end of the second flange (202) is provided with a second mounting groove (204), the second mounting groove (204) and the second flange (202) are on the same side, the second sealing ring (205) is installed inside the second mounting groove (204), and a portion of the second sealing ring (205) protrudes from the end of the second flange (202).

6. The dual flange limited travel expansion joint of claim 1, wherein: The groove (301) is symmetrically arranged on the inner wall of the first pipe joint (101), and the guide rail (302) is symmetrically fixedly installed on the outer wall of the second pipe joint (201). The guide rail (302) extends into the groove (301).

7. The dual flange limited travel expansion joint of claim 6, wherein: The threaded seat (303) is fixedly installed on the outer wall of the first pipe joint (101), the fixing block (304) is fixedly installed on the outer wall of the second pipe joint (201), the threaded seat (303) and the fixing block (304) are arranged opposite to each other, and the turntable (306) is fixedly installed at the end of the screw (305) away from the fixing block (304).

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