Indirect air cooling bellow expansion joint
By designing a flange body, flange neck, and corrugated main structure on the expansion joint, lining it with an inner and outer layer of polytetrafluoroethylene insulation and anti-corrosion coating, and combining it with guide components and limit rings, the problems of inaccurate axial control and corrosion of the expansion joint in the indirect air-cooled system are solved, thereby improving the stability and safety of the system.
Patent Information
- Application Number
- CN202423174774.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Expansion joints in indirect air-cooled systems are difficult to control precisely in terms of axial expansion and contraction, leading to displacement deviations, uneven stress on the piping system, and susceptibility to leakage or rupture. They are also prone to damage in low-temperature and humid corrosive environments, affecting the stability and safety of the system.
It adopts a flange body, flange neck and corrugated main structure, with an inner PTFE protective layer and an outer thermal insulation and anti-corrosion coating. The guide component accurately guides axial expansion and contraction, and the limit ring prevents excessive deformation, thus enhancing sealing and anti-corrosion performance.
It achieves precise compensation of the expansion joint in the axial direction, prevents media erosion, reduces heat loss, improves energy utilization efficiency, extends service life, and ensures stable operation and safety of the system.
Smart Images
Figure CN223579312U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of expansion joint, concretely is indirect air cooling corrugated expansion joint. BACKGROUND
[0002] In the operation process of the indirect air cooling system, the axial expansion direction of the expansion joint is difficult to control accurately when coping with the thermal expansion and contraction of the pipeline, and displacement deviation often occurs, which not only cannot accurately compensate for the displacement change of the pipeline, but also causes uneven stress on the pipeline system, thereby causing loosening, leakage or even rupture of the pipeline connection, and the internal structure is directly exposed to the medium, which is easy to be eroded by the medium, thereby reducing the mechanical properties and service life of the expansion joint.
[0003] In a low-temperature environment, heat is lost too quickly, resulting in low energy utilization efficiency of the system and increasing operating costs; in a humid and corrosive environment, the expansion joint is easily corroded, and its shell and key components are gradually damaged, seriously affecting the reliability and safety of the expansion joint, reducing the stability and durability of the expansion joint, and bringing potential risks and hidden dangers to the stable operation of the indirect air cooling system. SUMMARY
[0004] The utility model discloses to solve the problems of the expansion joint, such as difficult accurate control of the axial expansion direction, lack of internal protection, easy erosion by the medium, fast heat loss in a low-temperature environment, and easy damage in a humid and corrosive environment, and provides an indirect air cooling corrugated expansion joint.
[0005] The utility model discloses to solve the problems of the expansion joint, such as difficult accurate control of the axial expansion direction, lack of internal protection, easy erosion by the medium, fast heat loss in a low-temperature environment, and easy damage in a humid and corrosive environment, and provides an indirect air cooling corrugated expansion joint.
[0006] The indirect air cooling corrugated expansion joint comprises a flange disc body, the bottom side of the flange disc body is fixedly connected with a flange neck part, the bottom side of the flange neck part is fixedly connected with a corrugated main body, the flange disc body and the flange neck part are provided with two groups, the flange disc body and the flange neck part are arranged in a relative state at the upper and lower ends of the corrugated main body, the side wall of the flange disc body is provided with an inner ring bolt hole and an outer ring bolt hole, the inner ring of the outer ring bolt hole penetrates a guide assembly, the flange disc body comprises an inner layer of the corrugated main body integrally formed and provided with an inner lining, the outer ring of the corrugated main body is sleeved with a limiting ring, the outer side of the flange disc body is provided with a protective layer, the protective layer comprises a heat preservation layer and a corrosion-resistant coating, and the heat preservation layer and the corrosion-resistant coating are coated on the outer side of the entire flange disc body, the flange neck part and the corrugated main body.
[0007] Further, the inner liner is made of polytetrafluoroethylene, which has good chemical stability and corrosion resistance, and can effectively prevent the medium from eroding the internal structure of the expansion joint.
[0008] Further, the bottom side of the flange body is provided with a circular groove around the bolt hole of the inner ring, which reduces the case of external collision and increases the sealing of the connection.
[0009] Further, the guide assembly includes a bolt head, a screw rod, a threaded tail and a nut, the bottom side of the bolt head is located on the top side of the flange body at the upper end, the outer side wall of the screw rod penetrates the bolt hole of the outer ring of the flange body at the upper and lower ends, and the nut is located on the bottom side of the flange body at the lower end, which plays a role in guiding and limiting the displacement direction of the expansion joint.
[0010] Further, the top end of the screw rod is fixedly connected to the bottom side of the bolt head, the threaded tail is arranged on the outer side of the lower end of the screw rod, and the inner ring of the nut is sleeved on the outer side of the threaded tail, so that the bolt head, the screw rod, the threaded tail and the nut of the guide assembly cooperate to enable the expansion joint to smoothly expand and contract in the axial direction.
[0011] Further, the thermal insulation layer is made of silica fiber material, which can reduce the heat exchange between the expansion joint and the external environment.
[0012] Further, the anti-corrosion coating is made of an epoxy resin coating, which further enhances the overall corrosion resistance of the expansion joint.
[0013] Compared with the prior art, the indirect air-cooled corrugated expansion joint has the following beneficial effects:
[0014] The indirect air-cooled corrugated expansion joint can accurately guide the axial expansion and contraction of the expansion joint through the guide assembly in the outer ring bolt hole, avoid displacement deviation, ensure the accuracy of the displacement compensation of the pipeline thermal expansion and contraction, maintain the normal operation of the pipeline system, the inner liner of the inner layer can effectively protect the internal structure from being eroded by the medium, and the outer covering thermal insulation layer and anti-corrosion coating can not only help maintain the temperature and reduce heat loss, but also enhance the overall resistance to external corrosion, prolong the service life, adapt to complex working conditions, in addition, the limiting ring of the outer ring of the corrugated main body can prevent excessive deformation, further improve the reliability and safety of the expansion joint during the working process, and provide all-round assistance for the efficient and stable operation of the indirect air-cooled system. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a three-dimensional external schematic view of the whole structure of the utility model;
[0016] Figure 2 It is a three-dimensional schematic view of the bottom structure of the guide assembly of the utility model;
[0017] Figure 3 This is a three-dimensional schematic diagram of the top of the entire structure of this utility model;
[0018] Figure 4 This is a schematic diagram of the flange body and the bottom of the flange neck of this utility model;
[0019] Figure 5 This is a schematic cross-sectional view of the entire structure of this utility model;
[0020] Figure 6 This is a schematic diagram showing the positional relationship of the protective layer of this utility model on the outside of the flange body;
[0021] Figure 7 Figure A shows the structural layer diagram of this practical protective layer.
[0022] In the diagram: 1. Flange body; 2. Flange neck; 3. Corrugated body; 4. Inner ring bolt holes; 5. Liner; 6. Circular groove; 7. Outer ring bolt holes; 8. Limiting ring; 9. Guide assembly; 91. Bolt head; 92. Screw; 93. Thread tail; 94. Nut; 10. Protective layer; 101. Insulation layer; 102. Anti-corrosion coating. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1:
[0024] like Figures 1-7 As shown, the indirect air-cooled corrugated expansion joint includes a flange body 1, a flange neck 2 fixedly connected to the bottom side of the flange body 1, and a corrugated body 3 fixedly connected to the bottom side of the flange neck 2. Two sets of flange bodies 1 and flange neck 2 are provided, and the flange bodies 1 and flange neck 2 are respectively located at the upper and lower ends of the corrugated body 3 in a relative state. The side wall of the flange body 1 is provided with an inner ring bolt hole 4 and an outer ring bolt hole 7. A guide component 9 passes through the inner ring of the outer ring bolt hole 7. The inner layer of the flange body 1, including the entire corrugated body 3, is provided with an inner liner 5. The outer ring of the corrugated body 3 is fitted with a limit ring 8. A protective layer 10 is provided on the outer side of the flange body 1.
[0025] like Figure 5 As shown, the inner liner 5 is made of polytetrafluoroethylene, which has good chemical stability and corrosion resistance, and can effectively prevent the medium from eroding the internal structure of the expansion joint.
[0026] like Figure 1 andFigure 4 As shown in the drawings, the bottom side of the flange body 1 is provided with a circular groove 6 around the inner circle bolt hole 4, which can hide a part of the bolts connected with the pipeline as much as possible, reduce the external collision, and increase the sealing of the connection.
[0027] As shown in the drawings, Figure 2 and Figure 3 The guide assembly 9 includes a bolt head 91, a screw rod 92, a threaded tail 93 and a nut 94. The bottom side of the bolt head 91 is located at the top side of the upper end flange body 1, the outer side wall of the screw rod 92 penetrates the outer circle bolt hole 7 at the upper and lower end flange body 1, and the nut 94 is located at the bottom side of the lower end flange body 1. The top end of the screw rod 92 is fixedly connected to the bottom side of the bolt head 91, the threaded tail 93 is arranged at the lower end of the screw rod 92, and the inner circle of the nut 94 is sleeved on the outer side of the threaded tail 93. The guide assembly 9 penetrating the outer circle bolt hole 7 plays a role in guiding and limiting the displacement direction of the expansion joint. The cooperation of the bolt head 91, the screw rod 92, the threaded tail 93 and the nut 94 of the guide assembly 9 enables the expansion joint to smoothly expand and contract in the axial direction, while avoiding lateral deviation or distortion. Example two:
[0028] As shown in the drawings, Figure 6 and Figure 7 The protective layer 10 includes a thermal insulation layer 101 and a corrosion-resistant coating 102. The thermal insulation layer 101 and the corrosion-resistant coating 102 are coated on the outer side of the entire flange body 1, the flange neck 2 and the corrugated body 3. The thermal insulation layer 101 is made of silica fiber material, which can reduce the heat exchange between the expansion joint and the external environment, and help maintain the temperature of the medium in the pipeline in cold environments. The corrosion-resistant coating 102 is made of an epoxy resin coating, which further enhances the overall corrosion resistance of the expansion joint and resists corrosion factors such as humid air and chemicals in the external environment.
[0029] Working principle: as shown in the drawings, Figures 1-5 The corrugated body 3 as the core component utilizes its own corrugated structure to elastically deform when the pipeline system expands and contracts axially due to temperature changes, thereby effectively compensating for the thermal expansion and contraction displacement of the pipeline. The upper and lower ends of the corrugated body 3 are respectively connected with the flange body 1 fixedly connected with the flange neck 2, and the two groups of flange bodies 1 are oppositely arranged to ensure the stable installation and connection of the expansion joint in the pipeline system.
[0030] The inner circle bolt hole 4 at the side wall of the flange body 1 is used for connection with the pipeline, and the circular groove 6 can hide a part of the bolts connected with the pipeline as much as possible, reduce the external collision, and increase the sealing of the connection.
[0031] The guide assembly 9, which is through the bolt hole 7 of the outer ring, plays a role in guiding and limiting the displacement direction of the expansion joint; the cooperation of the bolt head 91, screw rod 92, threaded tail 93 and nut 94 of the guide assembly 9 enables the expansion joint to smoothly expand and contract in the axial direction, while avoiding lateral deviation or distortion, ensuring the accuracy and stability of the expansion joint during displacement compensation and maintaining the normal operation of the pipeline system;
[0032] The inner lining 5 of the inner layer of the flange body 1 is made of polytetrafluoroethylene, which has good chemical stability and corrosion resistance, can effectively prevent the erosion of the medium to the internal structure of the expansion joint, especially when handling some corrosive cooling medium, can ensure the long-term stable operation and service life of the expansion joint;
[0033] The limiting ring 8 of the outer ring of the corrugated body 3 is used to limit the excessive deformation of the corrugated body, prevent the corrugated body from being damaged due to excessive expansion and contraction under extreme working conditions, and ensure that the expansion joint always works within a safe deformation range;
[0034] The thermal insulation layer 101 is made of silica fiber material, which can reduce the heat exchange between the expansion joint and the external environment, help maintain the temperature of the medium in the pipeline in cold environments, prevent heat loss in high-temperature environments, and improve energy utilization efficiency; the corrosion-resistant coating 102 adopts an epoxy resin coating, which further enhances the overall corrosion resistance of the expansion joint and resists corrosion factors such as humid air and chemicals in the external environment.
Claims
1. Indirect air cooling corrugated expansion joint comprising a flanged body (1) characterized in that: The bottom side of the flange body (1) is fixedly connected with a flange neck (2), and the bottom side of the flange neck (2) is fixedly connected with a corrugated body (3); The flange body (1) and the flange neck (2) are provided with two groups, and the flange body (1) and the flange neck (2) are arranged in an opposite state at the upper and lower ends of the corrugated body (3), respectively. The side wall of the flange body (1) is provided with an inner ring bolt hole (4) and an outer ring bolt hole (7), the inner ring of the outer ring bolt hole (7) penetrates a guide assembly (9), and the flange body (1) includes an inner layer of the corrugated body (3) integrally formed with an inner liner (5), and the outer ring of the corrugated body (3) is sleeved with a limiting ring (8); The outer side of the flange body (1) is provided with a protective layer (10), and the protective layer (10) includes a heat preservation layer (101) and a corrosion resistant coating (102), and the heat preservation layer (101) and the corrosion resistant coating (102) are coated on the outer side of the flange body (1), the flange neck (2) and the corrugated body (3).
2. The indirect air-cooled corrugated expansion joint of claim 1, wherein: The inner liner (5) is made of polytetrafluoroethylene.
3. The indirect air-cooled corrugated expansion joint of claim 1, wherein: The bottom side of the flange body (1) is provided with a circular groove (6) around the inner ring bolt hole (4).
4. The indirect air-cooled corrugated expansion joint of claim 1, wherein: The guide assembly (9) includes a bolt head (91), a screw rod (92), a threaded tail (93) and a nut (94), the bottom side of the bolt head (91) is located at the top side of the flange body (1) at the upper end, the outer side wall of the screw rod (92) penetrates the outer ring bolt hole (7) at the flange body (1) at the upper and lower ends, and the nut (94) is located at the bottom side of the flange body (1) at the lower end.
5. The indirect air-cooled corrugated expansion joint of claim 4, wherein: The top end of the screw rod (92) is fixedly connected to the bottom side of the bolt head (91), the threaded tail (93) is arranged at the outer side of the lower end of the screw rod (92), and the inner ring of the nut (94) is sleeved on the outer side of the threaded tail (93).
6. The indirect air-cooled corrugated expansion joint of claim 1, wherein: The heat preservation layer (101) is made of silica fiber material.
7. The indirect air-cooled corrugated expansion joint of claim 1, wherein: The corrosion resistant coating (102) is made of epoxy resin coating.