Novel coating type corrugated pipe leak repairing structure
By wrapping three sections of arc-shaped bellows at the leakage point of the high-temperature bellows and welding them, the problem of safe and rapid handling after the leakage of the high-temperature bellows was solved, ensuring construction safety and production continuity.
Patent Information
- Application Number
- CN202422687196.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-04
AI Technical Summary
In the existing technology, it is difficult to handle the leakage of high-temperature bellows safely and quickly, and replacing the heat-resistant layer or welding will cause safety hazards and production impacts.
Three sections of arc-shaped bellows are used to wrap the outside of the leaking bellows, filled with high-silicon high-temperature resistant cotton, and the parallelism is adjusted through the adjustment device and connected with locking bolts. Finally, argon arc welding is performed to ensure construction safety.
It achieves safe and effective leakage control without affecting production, reduces maintenance time and costs, improves safety and reduces labor intensity.
Smart Images
Figure CN223388244U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of metallurgical industry, in particular to a novel coated bellows leak repairing structure. Background Art
[0002] High-temperature bellows are widely used in blast furnace systems. Leakage is highly hazardous and can easily cause irreversible damage. It is important to promptly, effectively, safely, and quickly handle any leaks in the bellows. If left untreated for a long time, the high-temperature gas will cause the leak point to expand rapidly. A large-scale leak of high-temperature gas exceeding 1000°C will cause a major safety accident. However, there is a heat-resistant layer inside the on-site bellows, which is built with insulating bricks. Replacing the heat-resistant layer will cause the insulating bricks to loosen, leading to subsequent high-temperature leaks in the hot air system and affecting the safe use of the hot air furnace. If the entire bellows is replaced, irreversible damage will be caused to the internal heat-resistant layer, resulting in major hidden dangers for the entire system. In addition, the high-temperature bellows must meet expansion requirements, and their expansion and contraction performance must be normal between alternating hot and cold temperatures. Steel cannot be used for direct welding. How to deal with such problems during normal production is an urgent problem that needs to be solved. Utility Model Content
[0003] The technical problem to be solved by the utility model is to address the above-mentioned deficiencies in the prior art and provide a new type of coated bellows leak repair structure, which can ensure on-site construction safety and can safely and effectively control leakage without affecting production. It is easy to use and highly practical.
[0004] The technical solution adopted by the utility model is: a new type of wrapped bellows leak repair structure, including three sections of arc bellows, the angle of each section of the arc bellows is 120°, the three sections of the arc bellows are welded into a circular shape, the arc bellows are wrapped around the outside of the leakage bellows body, high-silicon high-temperature resistant cotton is provided between the arc bellows and the leakage bellows body, and the arc bellows is provided with an adjustment device for adjusting the corrugation distance.
[0005] As a further improvement, the adjustment device includes a screw, an adjustment nut and two side plates, the two side plates are respectively arranged on both sides of the arc-shaped corrugated pipe, the screw is installed on the two side plates, and both ends of the screw are threadedly connected with adjustment nuts.
[0006] Furthermore, both ends of the arc-shaped corrugated pipe are provided with connecting blocks, and the connecting blocks on two adjacent arc-shaped corrugated pipes are connected by locking bolts.
[0007] Furthermore, it also includes an arc plate, which is fixed on the leakage bellows body by welding.
[0008] Furthermore, the arc-shaped corrugated pipe includes a short pipe and a corrugated section, both ends of the corrugated section are connected to the short pipe, and the regulating device is arranged on the short pipe.
[0009] Furthermore, the arc-shaped corrugated pipe is made of 316L stainless steel, and the thickness of the corrugations on the corrugated section is 2 to 3 mm.
[0010] Beneficial effects
[0011] Compared with the prior art, the present invention has the following advantages:
[0012] The utility model discloses a novel wrapped bellows leak repair structure. The arc bellows is made of an integral part and then cut into equal parts. The size of the bellows is measured in advance to ensure that the diameter of the new arc bellows is more than 200mm larger than the diameter of the leaking bellows body. When the leaking bellows body leaks, the leaking bellows body is first temporarily plugged by making an arc plate of equal arc. The arc plate can be made of steel plates of various thicknesses such as 10mm, 14mm, and 16mm. After the plate is made, it is spot welded and fixed on the leaking part of the leaking bellows body. Then, high-silicon-oxygen high-temperature resistant cotton is applied. Then, three sections of arc bellows are hoisted in turn. After the three sections of arc bellows are hoisted in, the parallelism of the corrugations between the sections and the misalignment of the interfaces are adjusted by rotating the adjusting nut to ensure that the misalignment error is within 3 mm, and then use locking bolts to connect the adjacent connecting blocks, and connect the three sections of arc bellows together to play a role in preliminary positioning. After positioning, the corrugated section of the arc bellows is welded by argon arc gas shielded welding. After welding is completed, pressure leak test is carried out to detect no leakage. Through this structure, the outside of the original leaking bellows is covered and welded, and the arc bellows are assembled and welded in three sections. The size and height are adjustable, which can be applied to various responsible working conditions, can ensure the safety of on-site construction, and can safely and effectively control leakage without affecting production, greatly saving maintenance time, reducing labor intensity, and reducing maintenance costs. It is safe and reliable during implementation and has no direct contact with high-temperature gas, which greatly improves the safety factor. It is easy to use and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a partial cross-sectional structural schematic diagram of the utility model;
[0014] Figure 2 It is a side structural schematic diagram of the present utility model.
[0015] Among them: 1-arc bellows, 2-adjusting device, 3-high silicon oxygen high temperature resistant cotton, 4-leakage bellows body, 5-arc plate, 6-connecting block, 7-locking bolt, 11-short tube, 12-corrugated section, 21-screw, 22-adjusting nut, 23-side plate. DETAILED DESCRIPTION
[0016] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.
[0017] See Figure 1-2 As shown, the utility model is a new type of wrapped bellows leak repair structure, including three sections of arc bellows 1, each section of the arc bellows 1 has an included angle of 120 degrees, and the three sections of the arc bellows 1 are welded into a circular shape. The arc bellows 1 is wrapped around the outside of the leaking bellows body 4, and high-silicon high-temperature resistant cotton 3 is provided between the arc bellows 1 and the leaking bellows body 4. The arc bellows 1 is provided with an adjusting device 2 for adjusting the corrugation distance. The arc bellows 1 is made as a whole after processing. The bellows are cut into pieces, and the size of the bellows is measured in advance to ensure that the diameter of the new arc bellows 1 is more than 200mm larger than the diameter of the leaking bellows body 4. When the leaking bellows body 4 leaks, first use temporary plugging on the leaking bellows body 4 to make an arc plate 5 of equal arc. It can be made of steel plates of various thicknesses such as 10mm, 14mm, and 16mm. After making it, the arc plate 5 is spot welded and fixed on the leaking part of the leaking bellows body 4, and then coated with high-silicon-oxygen high-temperature resistant Cotton 3, then hoist the three sections of arc bellows 1 in turn. After the three sections of arc bellows 1 are hoisted in, the parallelism of the corrugations and the interface misalignment between the sections are adjusted by rotating the adjusting nut 22 to ensure that the misalignment error is within 3mm. Then use the locking bolt 7 to connect the adjacent connecting blocks 6 to connect the three sections of arc bellows 1 together, which plays a role in preliminary positioning. After positioning, the corrugated section 12 of the arc bellows 1 is welded by argon arc gas shielded welding. After welding is completed, a pressure leak test is performed to detect no leakage. Through this structure, the outside of the original leaking bellows is covered and welded, and the arc bellows are assembled and welded in three sections. The size and height are adjustable, which can be applied to various responsible working conditions, can ensure the safety of on-site construction, and can safely and effectively control leakage without affecting production, greatly saving maintenance time, reducing labor intensity, and reducing maintenance costs. It is safe and reliable during implementation and has no direct contact with high-temperature gas, which greatly improves the safety factor.
[0018] Specifically, the adjusting device 2 includes a screw 21, an adjusting nut 22 and two side plates 23. The two side plates 23 are respectively arranged on both sides of the arc-shaped corrugated pipe 1. The screw 21 is installed on the two side plates 23. Both ends of the screw 21 are threadedly connected with an adjusting nut 22. The side plates 23 are tightened by rotating the adjusting nut 22. The side plates 23 act on both sides of the arc-shaped corrugated pipe 1 to adjust the corrugation distance on the corrugated section 12 to meet different installation requirements.
[0019] Preferably, connecting blocks 6 are provided at both ends of the arc-shaped corrugated pipe 1. The connecting blocks 6 on two adjacent arc-shaped corrugated pipes 1 are connected by locking bolts 7. The adjacent connecting blocks 6 are connected by locking bolts 7 to connect the three sections of arc-shaped corrugated pipes 1 together, which plays a role of preliminary positioning and facilitates subsequent welding.
[0020] Furthermore, it also includes an arc plate 5, which is fixed on the leakage bellows body 4 by welding. The arc plate 5 with equal curvature can be made of steel plates of various thicknesses such as 10mm, 14mm, 16mm, etc. After production, the arc plate 5 is spot welded and fixed on the leakage part of the leakage bellows body 4, which plays a role in preliminarily preventing leakage.
[0021] Furthermore, the arc-shaped corrugated tube 1 includes a short tube 11 and a corrugated section 12. Both ends of the corrugated section 12 are connected to the short tube 11. The adjustment device 2 is arranged on the short tube 11, so that the width of the arc-shaped corrugated tube 1 can be determined according to actual conditions to meet the use of different scenarios.
[0022] Furthermore, the arc-shaped bellows 1 is made of 316L stainless steel, the thickness of the corrugations on the corrugated section 12 is 2 to 3 mm, and the width of the arc-shaped bellows 1 can be flexibly changed according to actual conditions on site, and bellows of different sizes can be produced.
[0023] When using a new type of wrapped bellows leak repair structure of this embodiment, the bellows size is measured in advance to ensure that the diameter of the new arc bellows 1 is more than 200mm larger than the diameter of the leaking bellows body 4. When the leaking bellows body 4 leaks, first use temporary plugging on the leaking bellows body 4 to make an arc plate 5 of equal arc, which can be made of steel plates of various thicknesses such as 10mm, 14mm, and 16mm. After making it, the arc plate 5 is spot welded and fixed on the leaking part of the leaking bellows body 4, and then coated with high silicon. Oxygen high temperature resistant cotton 3, then hoist the three sections of arc bellows 1 in turn. After the three sections of arc bellows 1 are hoisted in, the parallelism of the corrugations between the sections and the misalignment of the interfaces are adjusted by rotating the adjusting nut 22 to ensure that the misalignment error is within 3mm. Then, the adjacent connecting blocks 6 are connected with the locking bolts 7 to connect the three sections of arc bellows 1 together, which plays the role of preliminary positioning. After positioning, the corrugated section 12 of the arc bellows 1 is welded by argon arc gas shielded welding. After welding is completed, a pressure leak test is performed to detect that there is no leakage. The utility model is a new type of wrapped bellows leak repair structure, which is coated and welded on the outside of the original leaking bellows. The three sections of arc bellows are assembled and welded. The size and height are adjustable. It can be applied to various responsible working conditions, can ensure the safety of on-site construction, and can safely and effectively control leakage without affecting production, greatly saving maintenance time, reducing labor intensity, and reducing maintenance costs. It is safe and reliable during implementation and does not come into direct contact with high-temperature gas, which greatly improves the safety factor.
[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.
Claims
1. A new type of wrapped bellows leak repair structure, characterized in that: The invention comprises three sections of arc-shaped bellows (1), each section of the arc-shaped bellows (1) has an included angle of 120°, the three sections of the arc-shaped bellows (1) are welded into a circular shape, the arc-shaped bellows (1) are wrapped around the outside of the leakage bellows body (4), high-silicon-oxygen high-temperature resistant cotton (3) is provided between the arc-shaped bellows (1) and the leakage bellows body (4), and the arc-shaped bellows (1) is provided with an adjusting device (2) for adjusting the corrugation distance.
2. A novel wrapped corrugated pipe leak repair structure according to claim 1, characterized in that: The adjusting device (2) comprises a screw (21), an adjusting nut (22) and two side plates (23). The two side plates (23) are respectively arranged on both sides of the arc-shaped corrugated pipe (1). The screw (21) is mounted on the two side plates (23). Both ends of the screw (21) are threadedly connected with the adjusting nuts (22).
3. The novel wrapped corrugated pipe leak repairing structure according to claim 1 is characterized in that: Both ends of the arc-shaped corrugated pipe (1) are provided with connecting blocks (6), and the connecting blocks (6) on two adjacent arc-shaped corrugated pipes (1) are connected by locking bolts (7).
4. A novel wrapped corrugated pipe leak repair structure according to claim 1, characterized in that: It also includes an arc-shaped plate (5), which is fixed on the leakage bellows body (4) by welding.
5. The novel wrapped corrugated pipe leak repairing structure according to claim 1 is characterized in that: The arc-shaped corrugated pipe (1) comprises a short pipe (11) and a corrugated section (12), both ends of the corrugated section (12) are connected to the short pipe (11), and the regulating device (2) is arranged on the short pipe (11).
6. The novel wrapped corrugated pipe leak repairing structure according to claim 5, characterized in that: The arc-shaped corrugated pipe (1) is made of 316L stainless steel, and the corrugation thickness of the corrugated section (12) is 2 to 3 mm.