Anti-wear expansion joint

Abstract

The utility model provides an anti -wear expansion joint, including import pipe subassembly, ring plate subassembly, flow guide tube, export pipe subassembly and bellows, ring plate subassembly and flow guide tube have the accommodation space between, the dustproof ring, first baffle ring and second baffle ring are provided in the accommodation space, one end of first baffle ring and ring plate subassembly are connected, the other end extends to flow guide tube and has the gap between flow guide tube, one end of second baffle ring and flow guide tube are connected, the other end extends to ring plate subassembly and has the gap between ring plate subassembly, first baffle ring and second baffle ring set up in the downstream side of dustproof ring. Utilize dustproof ring to seal and play the first barrier action to the accommodation space formed between two. First baffle ring and second baffle ring further play the second barrier action, prevent the tiny solid particle with the flow of medium to pass through dustproof ring and reach bellows and cause the wear failure of bellows, guarantee the safe and reliable operation of expansion joint.

Description

Technical Field

[0001] This utility model relates to the field of expansion joints, and more specifically, to a wear-resistant expansion joint. Background Technology

[0002] In the field of high-temperature chemical plants, chemical pipelines are characterized by high operating temperatures, high pressures, and high medium flow velocities. Corrugated expansion joints, as important flexible compensation equipment in pressure pipeline systems, can compensate for thermal and mechanical deformation of pipelines, thereby reducing pipeline stress and extending pipeline service life. External pressure axial expansion joints are expansion joints composed of a corrugated pipe that withstands external pressure, as well as outer pipes, guide tubes, and other structural components, primarily used to absorb axial displacement of pipelines. For example... Figure 1 As shown, once the pipeline is in normal operation, the expansion joint can meet the flexible compensation requirements of the high-temperature chemical pipeline network, while also providing insulation to reduce heat loss. To prevent solid particles from entering the bellows and causing wear, a dustproof ring is installed between the guide tube and the ring plate assembly to block solid particles. However, with the continuous impact of the high-temperature medium, small solid particles inside the pipeline can pass through the dustproof ring with the flow of the medium and accumulate at the bellows, easily leading to wear and failure of the bellows and loss of its flexible compensation function. This poses a significant safety hazard to the high-pressure pipeline system. Utility Model Content

[0003] In view of this, the present invention aims to propose a wear-resistant expansion joint to solve the problem that the protection of bellows by relying solely on dust rings in the prior art is limited.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A wear-resistant expansion joint includes an inlet pipe assembly, an annular plate assembly, a flow guide tube, an outlet pipe assembly, and a bellows. One end of the bellows is connected to the inlet pipe assembly, and the other end is connected to the outlet pipe assembly. A receiving space exists between the annular plate assembly and the flow guide tube. A dustproof ring, a first retaining ring, and a second retaining ring are disposed within this receiving space. One end of the first retaining ring is connected to the annular plate assembly, and the other end extends towards the flow guide tube with a gap between them. One end of the second retaining ring is connected to the flow guide tube, and the other end extends towards the annular plate assembly with a gap between them. The first and second retaining rings are located downstream of the dustproof ring. The dustproof ring seals the receiving space between the two components, providing a first barrier to prevent solid particles from accumulating at the bellows when high-speed media continuously impacts it. The first and second retaining rings further provide a second barrier, preventing fine solid particles from passing through the dustproof ring and reaching the bellows, causing wear and failure of the bellows. The first and second retaining rings enable the downstream flow channel of the dustproof ring to form a "maze"-like structure, increasing the resistance to the flow of the medium and thus reducing the entry of solid particles.

[0006] Furthermore, the dustproof ring is annular and is used to fit over the outer wall of the guide tube. The ring plate assembly, dustproof ring, and guide tube work together, and the dustproof ring provides a good seal, effectively isolating most solid particles and reducing the accumulation and wear of solid particles on the inner wall of the bellows.

[0007] Furthermore, the first retaining ring and the ring plate assembly are welded together, and the second retaining ring and the guide tube are welded together. This helps improve the connection stability of the first and second retaining rings and prevents them from detaching due to prolonged scouring by high-speed media.

[0008] Furthermore, the inner walls of the annular plate assembly and the inlet pipe assembly are connected, and the inner walls of the guide tube and the outlet pipe assembly are connected. The inlet pipe assembly, the guide tube, and the outlet pipe assembly are coaxially arranged. Together, they form the medium flow channel of the expansion joint. The annular plate assembly and the guide tube are used in conjunction to improve the reliability of the expansion joint under harsh operating conditions.

[0009] Furthermore, the outlet pipe assembly is disposed inside the bellows, covering the inner surface of the bellows. The outlet pipe assembly effectively protects the bellows, preventing high-speed media from directly impacting the trough areas of the bellows, reducing erosion and wear, and extending the service life of the bellows.

[0010] Furthermore, the inner wall of the inlet pipe assembly is provided with a first heat-insulating and wear-resistant lining at the end facing the annular plate assembly, the inner wall of the guide tube is provided with a second heat-insulating and wear-resistant lining, and the inner wall of the outlet pipe assembly is provided with a third heat-insulating and wear-resistant lining. The first, second, and third heat-insulating and wear-resistant linings provide heat insulation, reducing heat loss during medium flow, making them suitable for high-temperature media. They also protect the inlet pipe assembly, guide tube, and outlet pipe assembly, reducing wear from the medium.

[0011] Furthermore, a first heat insulation layer is provided between the inlet pipe assembly and the ring plate assembly, and a second heat insulation layer is provided on the outer wall of the guide tube. The first and second heat insulation layers can provide heat insulation and reduce heat loss.

[0012] Compared with the prior art, the wear-resistant expansion joint of this utility model has the following advantages:

[0013] (1) The dustproof ring seals the containment space and acts as the first barrier. The first and second retaining rings further act as the second barrier, preventing fine solid particles from passing through the dustproof ring with the flow of the medium and reaching the bellows, causing wear and failure of the bellows. Since there is a gap between the first retaining ring and the guide tube, and a gap between the second retaining ring and the ring plate assembly, the expansion joint can still play a flexible compensation role. The first and second retaining rings increase the resistance to the flow of the medium, thus preventing solid particles from entering the bellows.

[0014] (2) The outlet pipe assembly covers the inner surface of the bellows, effectively protecting the bellows and preventing high-speed media from directly impacting the trough area of ​​the bellows, reducing erosion and wear on the bellows, and improving the service life of the bellows.

[0015] (3) The first heat-insulating and wear-resistant lining, the second heat-insulating and wear-resistant lining and the third heat-insulating and wear-resistant lining can play a heat-insulating role, reduce heat loss when the medium flows, and also reduce the wear of the medium on the medium flow channel; the first heat-insulating layer and the second heat-insulating layer can play a heat-insulating role, reducing heat loss. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0017] Figure 1 This is a cross-sectional view of a wear-resistant expansion joint in the prior art;

[0018] Figure 2 This is a schematic diagram of the wear-resistant expansion joint described in this utility model;

[0019] Figure 3 This is a cross-sectional view of the wear-resistant expansion joint described in this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Inlet pipe assembly; 2. First heat-insulating and wear-resistant lining; 3. First heat insulation layer; 4. Ring plate assembly; 5. Dustproof ring; 6. Second heat insulation layer; 7. Flow guide tube; 8. Second heat-insulating and wear-resistant lining; 9. Outlet pipe assembly; 10. Third heat-insulating and wear-resistant lining; 11. Corrugated pipe; 12. First retaining ring; 13. Second retaining ring. Detailed Implementation

[0022] 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. In addition, the orientations involved in the following specific embodiments are briefly explained: the directions or positional relationships indicated by "front," "rear," "up," "down," "left," "right," "top," and "bottom" mentioned in the embodiments refer to the orientations or positional relationships shown in the accompanying drawings. The term "on..." means directly or indirectly supported by the... element.

[0023] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] like Figures 2-3 As shown, an anti-wear expansion joint includes an inlet pipe assembly 1, an annular plate assembly 4, a guide tube 7, an outlet pipe assembly 9, and a bellows 11. One end of the bellows 11 is connected to the inlet pipe assembly 1, and the other end is connected to the outlet pipe assembly 9. There is a receiving space between the annular plate assembly 4 and the guide tube 7. A dustproof ring 5, a first baffle ring 12, and a second baffle ring 13 are disposed in the receiving space. One end of the first baffle ring 12 is connected to the annular plate assembly 4, and the other end extends toward the guide tube 7 with a gap between them. One end of the second baffle ring 13 is connected to the guide tube 7, and the other end extends toward the annular plate assembly 4 with a gap between them. The first baffle ring 12 and the second baffle ring 13 are disposed downstream of the dustproof ring 5.

[0025] In this application, the flow direction of the medium is from the inlet pipe assembly 1 towards the outlet pipe assembly 9. For ease of description, the side facing the outlet pipe assembly 9 is defined as downstream, and the side away from the outlet pipe assembly 9 is defined as upstream. A dustproof ring 5 is sandwiched between the ring plate assembly 4 and the guide cylinder 7. The dustproof ring 5 seals the containment space formed between the two and acts as a first barrier, preventing solid particles from accumulating at the bellows 11 when the high-speed medium continuously impacts it. The first baffle ring 12 and the second baffle ring 13 further act as a second barrier, preventing fine solid particles from passing through the dustproof ring 5 with the flow of the medium and reaching the bellows 11, causing wear and failure of the bellows 11. Because there are gaps between the first baffle ring 12 and the guide cylinder 7, and between the second baffle ring 13 and the ring plate assembly 4, the first baffle ring 12 and the second baffle ring 13 can form a "maze"-like structure in the unobstructed flow channel downstream of the dustproof ring 5, increasing the resistance to the flow of the medium and thus reducing the entry of solid particles. Furthermore, if some solid particles, after being blocked by the first baffle ring 12, can still flow through the gap between the first baffle ring 12 and the guide tube 7, the second baffle ring 13 will also act as a barrier upon encountering them. The expansion joint of this application has a simple structure and strong applicability, making it suitable for different types of expansion joint structures. By utilizing the dustproof ring 5, the first baffle ring 12, and the second baffle ring 13 to provide multiple barriers, it reduces the possibility of damage to the inner wall of the bellows 11 due to wear from solid particles, ensuring the safe and reliable operation of the expansion joint and guaranteeing its flexible compensation function.

[0026] The dustproof ring 5 is annular and is used to fit around the outer wall of the guide tube 7. The ring plate assembly 4, the dustproof ring 5, and the guide tube 7 cooperate with each other. The dustproof ring 5 can play a good sealing role, effectively isolating most solid particles and reducing the accumulation and wear of solid particles on the inner wall of the bellows 11.

[0027] As a preferred example of this application, the first retaining ring 12 is welded to the ring plate assembly 4, and the second retaining ring 13 is welded to the guide tube 7. This improves the connection stability of the first retaining ring 12 and the second retaining ring 13, preventing them from detaching due to prolonged scouring by high-speed media.

[0028] The inner walls of the annular plate assembly 4 and the inlet pipe assembly 1 are connected, and the inner walls of the guide tube 7 and the outlet pipe assembly 9 are connected. The inlet pipe assembly 1, the guide tube 7, and the outlet pipe assembly 9 are coaxially arranged. Together, they form the medium flow channel of the expansion joint. The guide tube 7 can effectively reduce noise and vibration caused by the impact of medium flow, and prevent the expansion joint from fatigue failure due to long-term vibration. The annular plate assembly 4 and the guide tube 7 are used together to improve the reliability of the expansion joint under harsh working conditions.

[0029] As a preferred example of this application, the outlet pipe assembly 9 is disposed inside the bellows 11, and the outlet pipe assembly 9 covers the inner surface of the bellows 11. The outlet pipe assembly 9 effectively protects the bellows 11, preventing high-speed media from directly impacting the trough areas of the bellows 11, reducing erosion and wear, and improving the service life of the bellows 11. Specifically, this application only uses an external pressure axial expansion joint as an example; the first retaining ring 12 and the second retaining ring 13 can also be used in other types of expansion joints to provide anti-wear functionality.

[0030] As a preferred example of this application, the inner wall of the inlet pipe assembly 1 is provided with a first heat-insulating and wear-resistant lining 2 at the end facing the annular plate assembly 4, the inner wall of the guide tube 7 is provided with a second heat-insulating and wear-resistant lining 8, and the inner wall of the outlet pipe assembly 9 is provided with a third heat-insulating and wear-resistant lining 10. The first heat-insulating and wear-resistant lining 2, the second heat-insulating and wear-resistant lining 8, and the third heat-insulating and wear-resistant lining 10 can play a heat-insulating role, reducing heat loss during medium flow, making it suitable for use with high-temperature media. At the same time, they can also protect the inlet pipe assembly 1, the guide tube 7, and the outlet pipe assembly 9, reducing wear from the medium.

[0031] As a preferred example of this application, a first heat insulation layer 3 is provided between the inlet pipe assembly 1 and the ring plate assembly 4, and a second heat insulation layer 6 is provided on the outer wall of the guide tube 7. The first heat insulation layer 3 and the second heat insulation layer 6 can play a heat insulation role, reducing heat loss. It should be noted that, in order to avoid affecting the function of the first baffle ring 12 and the second baffle ring 13, the second heat insulation layer 6 provided on the outer wall of the guide tube 7 should avoid the first baffle ring 12 and the second baffle ring 13.

[0032] The wear-resistant expansion joint of this application can effectively prevent solid particles from entering the bellows 11, reduce the accumulated wear on the wall of the bellows 11, and ensure the safe and reliable operation of the expansion joint.

[0033] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various alterations and modifications without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A wear-resistant expansion joint, comprising an inlet pipe assembly (1), an annular plate assembly (4), a guide tube (7), an outlet pipe assembly (9), and a bellows (11), one end of the bellows (11) being connected to the inlet pipe assembly (1) and the other end being connected to the outlet pipe assembly (9), wherein there is a receiving space between the annular plate assembly (4) and the guide tube (7), characterized in that, The containment space is provided with a dustproof ring (5), a first baffle ring (12) and a second baffle ring (13). One end of the first baffle ring (12) is connected to the ring plate assembly (4), and the other end extends toward the guide tube (7) and has a gap with the guide tube (7). One end of the second baffle ring (13) is connected to the guide tube (7), and the other end extends toward the ring plate assembly (4) and has a gap with the ring plate assembly (4). The first baffle ring (12) and the second baffle ring (13) are located on the downstream side of the dustproof ring (5).

2. The expansion joint according to claim 1, characterized in that, The dustproof ring (5) is annular and is used to be fitted onto the outer wall of the guide tube (7).

3. The expansion joint according to claim 1, characterized in that, The first retaining ring (12) is welded to the ring plate assembly (4), and the second retaining ring (13) is welded to the guide tube (7).

4. The expansion joint according to claim 1, characterized in that, The inner walls of the ring plate assembly (4) and the inlet pipe assembly (1) are connected, the inner walls of the guide tube (7) and the outlet pipe assembly (9) are connected, and the inlet pipe assembly (1), the guide tube (7) and the outlet pipe assembly (9) are coaxially arranged.

5. The expansion joint according to claim 1, characterized in that, The outlet pipe assembly (9) is disposed inside the bellows (11) and covers the inner surface of the bellows (11).

6. The expansion joint according to claim 1, characterized in that, The inner wall of the inlet pipe assembly (1) is provided with a first heat-insulating and wear-resistant lining (2) at the end facing the ring plate assembly (4), the inner wall of the guide tube (7) is provided with a second heat-insulating and wear-resistant lining (8), and the inner wall of the outlet pipe assembly (9) is provided with a third heat-insulating and wear-resistant lining (10).

7. The expansion joint according to claim 1, characterized in that, A first heat insulation layer (3) is provided between the inlet pipe assembly (1) and the ring plate assembly (4), and a second heat insulation layer (6) is provided on the outer wall of the guide tube (7).

Images