Improved high-temperature-resistant turbulence medium expansion joint
By using technical means such as different types of reception, clipping structure, temperature component, and high -temperature expansion set in high temperature expansion sections, the problem of internal lining and the carbonization of insulation materials under high -temperature working conditions is solved, and the structural stability and intervals are realized. Improvement of thermal performance.
Patent Information
- Application Number
- CN202421064659.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-16
AI Technical Summary
The existing high-temperature expansion joints are prone to cracking the lining cylinder and carbonization of the insulation material under high temperature conditions, resulting in structural instability and degradation of thermal insulation performance.
The alien -type connection and the core structure are adopted, combined with the temperature components and high -temperature telescopic sleeves, forming a multi -layer insulation structure, and the sealing properties are improved through a flexible sealing ring.
It improves the stability of the structure and the resistance of the diversion cylinder, enhances the density, reduces the risk of the medium string heat, and extends the service life.
Smart Images
Figure CN222416589U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field, in particular to an improved high-temperature resistant turbulent medium expansion joint. Background Art
[0002] At present, high-temperature expansion joints used in high-temperature piping systems in the petrochemical industry at home and abroad usually adopt an internally filled insulation structure to improve the service life of the bellows in order to prevent the bellows from being affected by high-temperature oxidation or high-temperature creep of high-temperature media. Figure 1 As shown, the prior art is that the prior art bellows No. 17 is welded to the end pipe No. 15, the middle pipe No. 18 is welded, the inner liner No. 16 is welded to the end pipe No. 15, and after the end pipe No. 15 is expanded, a certain cavity is formed between the inner liner and the bellows, and the prior art heat insulation components No. 18 and 16 are filled therein, the middle pipe No. 18 is welded to the fixing ring No. 20 and the middle guide tube assembly No. 19 to form a middle section cavity, and the heat insulation component No. 21 is filled therein, and the filling insulation material can play a heat insulation role for the pipe and the bellows.
[0003] The expansion joint structure in the prior art diagram has the following problems: 1. The secondary stress under high temperature conditions will cause the inner liner to crack, and the adsorption force generated by the high-velocity turbulent medium will cause the inner liner to deform. 2. The existence of the lining gap allows the lateral and angular displacement deformation of the expansion joint, but the high-temperature medium will transmit heat from the gap, which will also cause the insulation material to carbonize under the combined effect of high temperature conditions and the expansion and contraction deformation of the bellows, thereby destroying the performance of the insulation material and further adversely affecting the pressure-bearing capacity and stability of the bellows.
[0004] Therefore, ensuring the stability of the product's lining metal structure and the compactness of the expansion joint lining gap are key points that need to be improved. Utility Model Content
[0005] The utility model aims to provide an improved high temperature resistant turbulent medium expansion joint to solve the problems of stability of the inner lining metal structure and compactness of the inner lining gap of the expansion joint.
[0006] The utility model provides an improved high temperature resistant turbulent medium expansion joint, comprising a special-shaped pipe 2, the special-shaped pipe 2 is based on the pipe minor diameter, the thickness of the pipe corner is enhanced to smoothly transition inside and outside, and the pipe major diameter is expanded and extends in the opposite direction of the pipe minor diameter, the space between the special-shaped pipe 2 and the thin inner liner and the sealing ring is filled with a thermal insulation component 12 to form end insulation, the special-shaped pipe 2, the middle pipe 3 and the bellows 1 are welded, and the thin inner liner comprises a first thin inner liner 7 and a second thin inner liner 8;
[0007] The sandwich structure 6 includes auxiliary sandwich rings on both sides of the main sandwich ring, long grooves are evenly distributed circumferentially on the outer edges of the auxiliary sandwich rings, and the outer sides of the main sandwich rings are connected to circumferentially evenly distributed limiting protrusions, which pass through the grooves to combine the main and two auxiliary sandwich rings into one, forming a floating sandwich structure;
[0008] The first thick inner liner 4 and the second thick inner liner 5 are connected to the main core ring, the intermediate connecting pipe 3 is connected to the auxiliary sandwich ring, the first thin inner liner 7 and the second thin inner liner 8, the first thick inner liner 4, the second thick inner liner 5, the intermediate connecting pipe 3 and the floating sandwich structure form a cavity, the cavity is filled with the first thermal insulation component 13 and the second thermal insulation component 14 to form middle section thermal insulation, and the ends of the thermal insulation material are sealed by the first sealing ring plate 10 and the second sealing ring plate 11.
[0009] Furthermore, the heat-insulating and high-temperature-resistant telescopic sleeve between the thin-walled end of the special-shaped pipe 2 and the first thick inner liner 4 and the second thick inner liner 5 is a stainless steel braided tube with a circular cross-section, which can be filled in the gap by stretching and extrusion and fixed to the pipe or the inner liner by a U-shaped clip.
[0010] The flexible sealing ring 9 is composed of a stainless steel mesh and super cotton wrapped with high-temperature resistant ceramic fiber cloth, and has certain flexibility and hardness, which can prevent the negative pressure suction under high flow rate medium from sucking out the insulation material, and play a role in protecting the insulation component 12.
[0011] Furthermore, the sealing ring 9 is a flexible sealing ring.
[0012] Furthermore, the sealing ring 9 is composed of a stainless steel wire mesh and a cotton layer wrapped with high temperature resistant ceramic fiber cloth.
[0013] The utility model has the following beneficial effects: The utility model provides an improved high temperature turbulent medium expansion joint. The utility model is aimed at the technical problems existing in non-metal expansion joints under high temperature and high flow rate gas conditions of domestic and foreign petrochemical enterprises. We have specially conducted research and development on expansion joints and developed an improved framework. The structure of the non-metal expansion joint is shown in the attached figure in Figure 7. Compared with the prior art, the main contents of the utility model are as follows: Figure 2As shown, the structure of the large diameter end of the double-step guide tube with a straight section improves the stability and frontal scouring resistance of the guide tube. The length of the double-step guide tube covers a sufficient distance outside the vertical ring plates on both sides, forming an effective insulation section, weakening the heat transfer effect on the vertical ring plates and reducing the risk of weld cracking. The space formed by the left end pipe, the right end pipe and the double-step guide tube has a thermal insulation component and a high-temperature telescopic sleeve that fits tightly. The high-temperature telescopic sleeve prevents the carbonization, loss and damage of the thermal insulation material under high temperature and high flow rate conditions. The thermal insulation component 12 improves the compactness of the frame assembly under the tightening action of the anchor nails and the steel belt. The outer layer of the thermal insulation component 12 is wrapped with a layer of aluminum foil and fixed to the vertical ring plates on both sides with steel rings to form the last thermal insulation barrier, which greatly improves the compactness of the frame and can completely prevent the internal hot air from being transmitted to the inner surface of the ring belt. The thermal insulation flexible belt is provided between the ring belt and the connecting short pipe, which plays a good thermal insulation role and reduces the risk of the ring belt being damaged and failing from the edge parts at both ends.
[0014] The improved high-temperature turbulent medium expansion joint of the utility model improves the stability of the structure and enhances the erosion resistance of the guide tube, enhances the density of the structure to reduce the risk of medium heat cross-talk, effectively reduces the heat conduction effect, thereby improving the temperature resistance and increasing the service life of the non-metallic expansion joint. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 The present invention is a schematic diagram of the prior art structure.
[0017] Figure 2 This is a schematic diagram of the structure of the improved high temperature turbulent medium expansion joint.
[0018] Illustrations: 1. Bellows, 2. Special-shaped connecting pipe, 3. Intermediate connecting pipe, 4. First thick inner liner, 5. Second thick inner liner, 6. Sandwich structure, 7. First thin inner liner, 8. Second thin inner liner, 9. Flexible sealing ring, 10. First sealing ring plate, 11. Second sealing ring plate, 12. Thermal insulation assembly, 13. First thermal insulation assembly, 14. Second thermal insulation assembly. DETAILED DESCRIPTION
[0019] like Figure 2As shown, the embodiment of the utility model provides an improved high temperature turbulent medium expansion joint, including a special-shaped pipe 2, the special-shaped pipe 2 is based on the pipe minor diameter, the thickness of the pipe corner is enhanced to smoothly transition inside and outside, and extends in the opposite direction of the pipe major diameter expansion and the pipe minor diameter, the space between the special-shaped pipe 2 and the thin inner liner and the sealing ring is filled with a thermal insulation component 12 to form end insulation, the special-shaped pipe 2, the middle pipe 3 and the bellows 1 are welded, and the thin inner liner includes a first thin inner liner 7 and a second thin inner liner 8;
[0020] The sandwich structure 6 includes auxiliary sandwich rings on both sides of the main sandwich ring, long grooves are evenly distributed circumferentially on the outer edges of the auxiliary sandwich rings, and the outer sides of the main sandwich rings are connected to circumferentially evenly distributed limiting protrusions, which pass through the grooves to combine the main and two auxiliary sandwich rings into one, forming a floating sandwich structure;
[0021] The first thick inner liner 4 and the second thick inner liner 5 are connected to the main core ring, the intermediate connecting pipe 3 is connected to the auxiliary sandwich ring, the first thin inner liner 7 and the second thin inner liner 8, the first thick inner liner 4, the second thick inner liner 5, the intermediate connecting pipe 3 and the floating sandwich structure form a cavity, the cavity is filled with the first thermal insulation component 13 and the second thermal insulation component 14 to form middle section thermal insulation, and the ends of the thermal insulation material are sealed by the first sealing ring plate 10 and the second sealing ring plate 11.
[0022] The heat-insulating and high-temperature-resistant telescopic sleeve between the thin-walled end of the special-shaped pipe 2 and the first thick inner liner 4 and the second thick inner liner 5 is a stainless steel braided tube with a circular cross-section, which can be filled in the gap by stretching and extrusion and fixed to the pipe or the inner liner by a U-shaped clip.
[0023] The flexible sealing ring 9 is composed of a stainless steel mesh and super cotton wrapped with high-temperature resistant ceramic fiber cloth, and has certain flexibility and hardness, which can prevent the negative pressure suction under high flow rate medium from sucking out the insulation material, and play a role in protecting the insulation component 12.
[0024] The sealing ring 9 is a flexible sealing ring. The sealing ring 9 is composed of a stainless steel wire mesh and a cotton layer wrapped with a high temperature resistant ceramic fiber cloth.
[0025] The utility model aims to solve the technical problems of metal expansion joints in the high-temperature turbulent medium working conditions of domestic and foreign petrochemical pipelines. We have specially carried out research and development of expansion joints and proposed the design of improved high-temperature turbulent medium expansion joints, which can be applied to high-temperature pipeline system conditions. The structure of the improved high-temperature turbulent medium expansion joint is as follows: Figure 2 As shown, compared with the prior art, the main contents of the utility model are as follows:
[0026] The improved high temperature turbulent medium expansion joint of the utility model includes two end-shaped pipes 2 integrally forged, the pipes are based on the pipe diameter, the thickness of the pipe corners is enhanced to make a smooth transition inside and outside, and the pipes are extended in the opposite direction of the pipe diameter and the pipe diameter. The space between the pipe 2 and the thin liner 7 and the sealing ring is filled by the insulation component 12 to form end insulation. The special pipe 2 and the middle pipe 3 are welded to the bellows 1.
[0027] Sandwich structure 6 see attached Figure 2 , mainly including auxiliary core rings on both sides of the main core ring, long grooves evenly distributed circumferentially on the outer edge of the auxiliary core ring, and circumferentially evenly distributed limiting protrusions connected to the outer side of the main core ring. The limiting protrusions pass through the grooves to combine the main and two auxiliary core rings into one, forming a floating sandwich structure. The first thick inner liner 4 and the second thick inner liner 5 are connected to the main core ring of the combined sandwich structure, and the middle pipe 3 is connected to the auxiliary core ring and the first thin inner liner 7 and the second thin inner liner 8. The inner liner, the pipe and the floating sandwich structure form a cavity, and the cavity is filled with the first insulation component 13 and the second insulation component 14 to form the middle section insulation, and the ends of the insulation material are blocked by the first sealing ring plate 10 and the second sealing ring plate 11.
[0028] The heat-insulating and high-temperature-resistant telescopic sleeve between the thin-walled end of the special-shaped pipe 2 and the first thin inner liner 7 and the second thin inner liner 8 is a stainless steel braided tube with a circular cross-section, which can be filled in the gap by stretching and extrusion and fixed to the pipe or the inner liner by a U-shaped clip.
[0029] The improved high temperature resistant turbulent medium expansion joint has been successfully applied to high temperature pipeline devices in many chemical fields. During the field use, the expansion joint had no failure problem, which met the customer's requirements for field conditions.
[0030] The integrally forged special-shaped pipe 2 has no cold working forming stress and welding stress, which can ensure that the cylinder remains stable in high-temperature turbulent media during operation and is not prone to deformation and damage. The multi-double plug structure formed by the pipe and the inner liner brings good buffering capacity and improves the medium erosion resistance.
[0031] The sandwich structure 6 includes auxiliary sandwich rings on both sides of the main sandwich ring, and the outer side of the main sandwich ring has circumferentially evenly distributed limiting protrusions. The limiting protrusions pass through the grooves to combine the main and two auxiliary sandwich rings into one, forming a floating sandwich structure. The first thick inner liner 4 and the second thick inner liner 5 are lining structures composed of inner liner tubes and sandwich structures, which can solve the problems of thermal expansion and thermal stress; the main sandwich ring of the floating sandwich structure is not directly welded to the connecting pipe, which can effectively weaken the heat transfer effect, thereby achieving the purpose of reducing the working temperature of the intermediate connecting pipe and the bellows.
[0032] The flexible sealing ring 9 is composed of a stainless steel mesh and super cotton wrapped with high-temperature resistant ceramic fiber cloth, and has certain flexibility and hardness, which can prevent the negative pressure suction under high flow rate medium from sucking out the insulation material, and play a role in protecting the insulation component No. 7.
[0033] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. Improved high temperature turbulent medium expansion joint, characterized by: Including special-shaped pipes (2); The special-shaped pipe (2) is based on the pipe minor diameter, and the thickness is enhanced at the pipe corner to achieve a smooth transition between the inside and the outside, and extends in the opposite direction of the pipe major diameter and the pipe minor diameter. The space between the special-shaped pipe (2) and the thin inner lining tube and the sealing ring is filled with a thermal insulation component (12) to form end thermal insulation. The special-shaped pipe (2), the middle pipe (3) and the bellows (1) are welded, and the thin inner lining tube includes a first thin inner lining tube (7) and a second thin inner lining tube (8); The sandwich structure (6) comprises auxiliary sandwich rings on both sides of a main sandwich ring, long grooves are evenly distributed circumferentially on the outer edges of the auxiliary sandwich rings, and the outer sides of the main sandwich rings are connected to circumferentially evenly distributed limiting protrusions, which pass through the grooves to connect the main and two auxiliary sandwich rings into one, thereby forming a floating sandwich structure; The first thick inner liner (4) and the second thick inner liner (5) are connected to the main core ring, the intermediate connecting pipe (3) is connected to the auxiliary sandwich ring, the first thin inner liner (7) and the second thin inner liner (8), the first thick inner liner (4), the second thick inner liner (5), the intermediate connecting pipe (3) and the floating sandwich structure form a cavity, the cavity is filled with the first thermal insulation component (13) and the second thermal insulation component (14) to form middle section thermal insulation, and the ends of the thermal insulation material are sealed by the first sealing ring plate (10) and the second sealing ring plate (11).
2. The improved high temperature resistant turbulent medium expansion joint according to claim 1 is characterized in that: The heat-insulating and high-temperature-resistant telescopic sleeve between the thin-walled end of the special-shaped pipe (2) and the first thick inner liner (4) and the second thick inner liner (5) is a stainless steel braided tube with a circular cross-section, which can be filled in the gap by stretching and extrusion and fixed to the pipe or the inner liner by a U-shaped clip.
3. The improved high temperature resistant turbulent medium expansion joint according to claim 1 is characterized in that: The sealing ring (9) is a flexible sealing ring.
4. The improved high temperature turbulent medium expansion joint according to claim 1 is characterized in that: The sealing ring (9) is composed of a stainless steel wire mesh and a cotton layer wrapped with high temperature resistant ceramic fiber cloth.