A high-temperature-resistant connecting device for a steam pipe of a high-temperature gas-cooled reactor nuclear power plant
By designing the connection mechanism and the high-temperature compensation mechanism, the problem of low construction efficiency of steam pipe connection devices in high-temperature gas-cooled reactor nuclear power plants was solved, achieving fast and stable connection and efficient energy transmission.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANGZHOU CHENGDE STEEL PIPE
- Filing Date
- 2025-08-04
- Publication Date
- 2026-07-24
AI Technical Summary
Existing steam pipe connection devices in high-temperature gas-cooled reactor nuclear power plants rely on multiple bolts for fixing, resulting in slow construction progress, high manpower consumption, and difficulty in meeting the needs of efficient construction, especially in complex construction environments with limited space.
It adopts a connection mechanism and a high-temperature compensation mechanism, including a fixing ring, a connecting ring, a plug, and a corrugated compensator. The plug and connecting plate work together to achieve rapid fixation, and the corrugated compensator absorbs pipeline deformation to prevent loosening and cracking.
It improves the stability and safety of steam pipe connections, reduces energy loss, prevents steam leakage, and enhances construction efficiency and service life.
Smart Images
Figure CN224551076U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steam pipe connection technology for nuclear power plants, specifically a high-temperature resistant connection device for steam pipes in high-temperature gas-cooled reactor nuclear power plants. Background Technology
[0002] The steam pipes of a high-temperature gas-cooled reactor nuclear power plant transport the high-temperature, high-pressure steam generated by the high-temperature gas-cooled reactor steam generator to equipment such as steam turbines, so that the thermal energy of the steam is converted into mechanical energy, which in turn drives the steam turbine to operate, drives the generator to generate electricity, and realizes the conversion of nuclear energy into electrical energy.
[0003] Existing steam pipe connection devices mostly rely on multiple bolts for fixing. Workers need to align and tighten the bolts one by one, which consumes a lot of time and manpower and seriously slows down the construction progress. Especially in the complex construction environment of high-temperature gas-cooled reactor nuclear power plants, where space is limited and the requirements for installation efficiency are stringent, this connection method that relies on multiple bolts cannot meet the needs of efficient construction. Therefore, a high-temperature resistant connection device for steam pipes in high-temperature gas-cooled reactor nuclear power plants is proposed. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this utility model provides a high-temperature resistant connection device for steam pipes in high-temperature gas-cooled reactor nuclear power plants. This solves the problem that workers need to align and tighten the bolts one by one, which consumes a lot of time and manpower and seriously slows down the construction progress. Especially in the complex construction environment of high-temperature gas-cooled reactor nuclear power plants, where space is limited and the requirements for installation efficiency are stringent, this connection method that relies on multiple bolts for fixing cannot meet the needs of efficient construction.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: it includes a first steam pipe and a second steam pipe, and a connecting mechanism and a high-temperature compensation mechanism are provided between the first steam pipe and the second steam pipe;
[0008] The connecting mechanism includes a connecting part and a fixing part;
[0009] The connecting part includes two fixed rings and two connecting rings, and the fixed part includes two sets of inserts and two movable rings;
[0010] The inner sides of the first steam pipe and the second steam pipe are respectively in contact with the outer walls of the two connecting rings. The outer walls of the two connecting rings are respectively fixedly connected to the inner sides of the two fixed rings. The outer walls of the two fixed rings are respectively slidably provided with two sets of inserts extending to the inner sides of the two fixed rings. The inner sides of the two sets of inserts respectively pass through the outer walls of the first steam pipe and the second steam pipe and the outer walls of the two connecting rings and extend to the inner sides of the two connecting rings. Two first flanges are respectively fixedly provided on the adjacent sides of the two connecting rings.
[0011] Preferably, the high-temperature compensation mechanism includes a corrugated compensator located between two connecting rings. Two second flanges are fixedly installed on the outer wall of the corrugated compensator. The high-temperature compensation mechanism can reduce stress concentration inside the pipeline and avoid pipeline rupture or loosening caused by the inability to compensate for deformation in traditional rigid connections.
[0012] Preferably, the outer walls of the two fixed rings are slidably connected to the inner sides of the two movable rings, and the outer walls of the two movable rings are respectively hinged with two sets of connecting plates. The outer walls of the two sets of inserts are respectively fixed with two sets of control plates. The outer walls of the two sets of connecting plates are respectively hinged to the outer walls of the two sets of control plates. The movable rings drive the hinged connecting plates to move by sliding, causing the inserts connected to the control plates to move radially along the fixed rings.
[0013] Preferably, two heat insulation rings are fixedly provided on the inner side of the fixing ring, and two heat insulation rings are respectively bonded to the inner side of the two heat insulation rings. The inner side of the two heat insulation rings is pressed and contacted with the outer wall of the first steam pipe and the second steam pipe, respectively. Two sealing rings are fixedly sleeved on the outer wall of the two connecting rings, and the outer wall of the two sealing rings is pressed and contacted with the inner side of the first steam pipe and the second steam pipe, respectively. The heat insulation rings and heat insulation rings are tightly attached to the outer wall of the steam pipe, which can reduce the energy loss caused by heat transfer through the fixing ring.
[0014] Preferably, two fixing frames are fixedly provided on the outer walls of the two fixing rings respectively. The outer walls of the two fixing frames are slidably connected to the inner sides of the two moving rings respectively. Two extrusion screws are threaded through the outer walls of the two fixing rings and extend to the inner sides of the two fixing frames respectively. Two sets of wedge grooves are opened on the outer walls of the two fixing rings respectively. Two sets of wedge blocks are slidably provided on the inner walls of the two sets of wedge grooves respectively. The outer walls of the two sets of wedge blocks are fixedly connected to the inner sides of the two moving rings respectively. Rotating the extrusion screws can further fix the position of the moving rings and ensure that the locking state of the insert is stable.
[0015] Preferably, the two first flanges and the two second flanges are connected by two sets of bolts. The corrugated compensator has a compensation amount of more than 10mm. With its own compensation amount of more than 10mm, the corrugated compensator absorbs the deformation of the pipeline through axial expansion or radial displacement, so as to avoid the pipeline from cracking or loosening due to stress concentration.
[0016] (III) Beneficial Effects
[0017] This invention provides a high-temperature resistant connection device for steam pipes in high-temperature gas-cooled reactor nuclear power plants. It has the following advantages:
[0018] (I) This high-temperature resistant connection device for steam pipes in a high-temperature gas-cooled reactor nuclear power plant has a moving ring in the connection mechanism that drives the connecting plate to drive the insert block through the steam pipe and the connecting ring. Multiple sets of insert blocks work together to firmly fix the first steam pipe, the second steam pipe, the connecting ring, and the fixed ring, effectively avoiding relative displacement caused by high-temperature vibration or pipe deformation. At the same time, the fixed frame guides the moving ring and fixes the squeezing screw, further strengthening the locking state of the insert block and improving the overall connection's resistance to loosening, ensuring structural stability under long-term high-temperature conditions. It has good sealing and heat insulation performance. The sealing ring on the outer wall of the connecting ring is in close contact with the inner side of the steam pipe, forming a reliable sealing barrier, effectively preventing high-temperature steam leakage. The heat insulation ring and the heat insulation ring on the inner side of the fixed ring are in close contact with the outer wall of the steam pipe, reducing energy loss caused by heat transfer through the fixed ring, improving steam transmission efficiency, and reducing the aging rate of external components due to high-temperature heating.
[0019] (II) The high-temperature resistant connection device for steam pipes in a high-temperature gas-cooled reactor nuclear power plant has a corrugated compensator in the high-temperature compensation mechanism with a compensation amount of more than 10mm. It can absorb the length change and deformation of the steam pipe caused by high temperature through axial expansion or radial displacement, reduce the stress concentration inside the pipe, avoid the pipe rupture or loose connection problem caused by the inability to compensate for deformation in traditional rigid connections, and improve the safety and service life under extreme high temperature environment. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0021] Figure 2 This is a schematic diagram of the structure of this utility model;
[0022] Figure 3 This is a schematic diagram of the structure of this utility model;
[0023] Figure 4 This is a schematic diagram of the structure of this utility model;
[0024] Figure 5 This is a schematic diagram of the structure of this utility model.
[0025] In the diagram: 1. First steam pipe; 2. Second steam pipe; 3. Connecting mechanism; 31. Fixed ring; 32. Moving ring; 33. Wedge block; 34. Control panel; 35. Insert block; 36. First flange; 37. Connecting ring; 38. Insulation ring; 39. Heat insulation ring; 310. Connecting plate; 311. Extrusion screw; 312. Fixed frame; 313. Sealing ring; 4. High temperature compensation mechanism; 41. Corrugated compensator; 42. Second flange; 43. Bolt assembly. Detailed Implementation
[0026] 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.
[0027] Please see Figure 1-5 The present invention provides a technical solution: including a first steam pipe 1 and a second steam pipe 2, wherein a connecting mechanism 3 and a high temperature compensation mechanism 4 are provided between the first steam pipe 1 and the second steam pipe 2;
[0028] The connecting mechanism 3 includes a connecting part and a fixing part;
[0029] The connecting part includes two fixed rings 31 and two connecting rings 37, and the fixed part includes two sets of inserts 35 and two moving rings 32;
[0030] The inner sides of the first steam pipe 1 and the second steam pipe 2 respectively contact the outer walls of the two connecting rings 37. The outer walls of the two connecting rings 37 are respectively fixedly connected to the inner sides of the two fixed rings 31. Two sets of inserts 35 are slidably provided through the outer walls of the two fixed rings 31, extending to the inner sides of the two fixed rings 31. The inner sides of the two sets of inserts 35 sequentially penetrate the outer walls of the first steam pipe 1 and the second steam pipe 2, as well as the outer walls of the two connecting rings 37, extending to the inner sides of the two connecting rings 37. Two first flanges 36 are fixedly provided on the adjacent sides of the two connecting rings 37. The outer walls of the two fixed rings 31 are slidably connected to the inner sides of the two moving rings 32. Two sets of connecting plates 310 are hinged to the outer walls of the two moving rings 32. Two sets of control plates 34 are fixedly provided on the outer walls of the two sets of inserts 35. The outer walls of the two sets of connecting plates 310 are hinged to the outer walls of the two sets of control plates 34. The inner sides of the fixed rings 31 are respectively fixed. Two heat insulation rings 39 are provided, and two heat insulation rings 38 are respectively bonded to the inner side of the two heat insulation rings 39. The inner side of the two heat insulation rings 38 is in contact with the outer wall of the first steam pipe 1 and the second steam pipe 2 respectively. Two sealing rings 313 are respectively fixedly sleeved on the outer wall of the two connecting rings 37. The outer wall of the two sealing rings 313 is in contact with the inner side of the first steam pipe 1 and the second steam pipe 2 respectively. Two fixing frames 312 are respectively fixedly provided on the outer wall of the two fixing rings 31. The outer wall of the two fixing frames 312 is slidably connected to the inner side of the two moving rings 32 respectively. Two extrusion screws 311 are threaded through the outer wall of the two fixing rings 31 and extend to the inner side of the two fixing frames 312 respectively. Two sets of wedge grooves are respectively opened on the outer wall of the two fixing rings 31. Two sets of wedge blocks 33 are slidably provided on the inner wall of the two sets of wedge grooves respectively. The outer wall of the two sets of wedge blocks 33 is respectively fixedly connected to the inner side of the two moving rings 32.
[0031] The high-temperature compensation mechanism 4 includes a corrugated compensator 41, which is located between two connecting rings 37. Two second flanges 42 are fixedly installed on the outer wall of the corrugated compensator 41. The two first flanges 36 and the two second flanges 42 are connected by two sets of bolts 43. The corrugated compensator 41 has a compensation amount of more than 10mm.
[0032] During use, the coordinated operation of the connecting mechanism 3 and the high-temperature compensation mechanism 4 ensures a stable connection of the steam pipe and safe operation in a high-temperature environment.
[0033] Under the action of the connecting mechanism 3, the device first completes the initial fixation with the first steam pipe 1 and the second steam pipe 2. The two connecting rings 37 are respectively attached to the inner side of the two steam pipes, and their outer walls are fixedly connected to the inner side of the fixing ring 31 to form a connection base. The moving ring 32 on the outer wall of the fixing ring 31 drives the hinged connecting plate 310 to move through sliding, causing the insert 35 connected to the control plate 34 to move radially along the fixing ring 31. The insert 35 passes through the outer wall of the steam pipe and the outer wall of the connecting ring 37 in sequence and extends to the inner side of the connecting ring 37. Through the coordinated insertion of multiple sets of inserts 35, the first steam pipe 1, the second steam pipe 2, the connecting ring 37 and the fixing ring 31 are firmly locked to avoid relative displacement. At the same time, the heat insulation ring 39 and the heat insulation ring 38 on the inner side of the fixing ring 31 are tightly attached to the outer wall of the steam pipe, which can reduce the energy loss caused by the heat transfer through the fixing ring 31. The sealing ring 313 on the outer wall of the connecting ring 37 is pressed and contacted with the inner side of the first steam pipe 1 and the second steam pipe 2, which can effectively prevent high temperature steam leakage and improve the connection sealing performance.
[0034] The fixing frame 312 on the outer wall of the fixing ring 31 provides a sliding guide for the moving ring 32. The rotating pressing screw 311 can further fix the position of the moving ring 32 and ensure that the locking state of the insert block 35 is stable.
[0035] The corrugated compensator 41, located between the two connecting rings 37, has its second flange 42 on its outer wall fixedly connected to the first flange 36 of the connecting ring 37 by bolt assembly 43, making the corrugated compensator 41 part of the connection passage. When the length of the first steam pipe 1 and the second steam pipe 2 changes due to high temperature, the corrugated compensator 41, with its own compensation amount of more than 10mm, absorbs the deformation of the pipeline through axial expansion or radial displacement, avoiding pipeline cracking or loosening due to stress concentration.
[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A high-temperature resistant connection device for steam pipes in a high-temperature gas-cooled reactor nuclear power plant, comprising a first steam pipe (1) and a second steam pipe (2), characterized in that: A connecting mechanism (3) and a high-temperature compensation mechanism (4) are provided between the first steam pipe (1) and the second steam pipe (2); The connecting mechanism (3) includes a connecting part and a fixing part; The connecting part includes two fixed rings (31) and two connecting rings (37), and the fixed part includes two sets of inserts (35) and two movable rings (32); The inner sides of the first steam pipe (1) and the second steam pipe (2) are in contact with the outer walls of the two connecting rings (37), respectively. The outer walls of the two connecting rings (37) are fixedly connected to the inner sides of the two fixing rings (31), respectively. The outer walls of the two fixing rings (31) are slidably provided with two sets of inserts (35) extending to the inner side of the two fixing rings (31). The inner sides of the two sets of inserts (35) respectively pass through the outer walls of the first steam pipe (1) and the second steam pipe (2) and the outer walls of the two connecting rings (37) in sequence, extending to the inner side of the two connecting rings (37). Two first flanges (36) are fixedly provided on the adjacent sides of the two connecting rings (37).
2. The high-temperature resistant connection device for steam pipes in a high-temperature gas-cooled reactor nuclear power plant according to claim 1, characterized in that: The high-temperature compensation mechanism (4) includes a corrugated compensator (41), which is located between two connecting rings (37). Two second flanges (42) are fixedly installed on the outer wall of the corrugated compensator (41).
3. The high-temperature resistant connection device for steam pipes in a high-temperature gas-cooled reactor nuclear power plant according to claim 1, characterized in that: The outer walls of the two fixed rings (31) are slidably connected to the inner sides of the two movable rings (32), and the outer walls of the two movable rings (32) are respectively hinged with two sets of connecting plates (310). The outer walls of the two sets of inserts (35) are respectively fixed with two sets of control plates (34), and the outer walls of the two sets of connecting plates (310) are respectively hinged to the outer walls of the two sets of control plates (34).
4. The high-temperature resistant connection device for steam pipes in a high-temperature gas-cooled reactor nuclear power plant according to claim 1, characterized in that: Two heat insulation rings (39) are fixedly provided on the inner side of the fixed ring (31). Two heat insulation rings (38) are bonded to the inner side of the two heat insulation rings (39). The inner side of the two heat insulation rings (38) is pressed and contacted with the outer wall of the first steam pipe (1) and the second steam pipe (2). Two sealing rings (313) are fixedly sleeved on the outer wall of the two connecting rings (37). The outer wall of the two sealing rings (313) is pressed and contacted with the inner side of the first steam pipe (1) and the second steam pipe (2).
5. A high-temperature resistant connection device for steam pipes in a high-temperature gas-cooled reactor nuclear power plant according to claim 1, characterized in that: Two fixed frames (312) are fixedly installed on the outer walls of the two fixed rings (31), and the outer walls of the two fixed frames (312) are slidably connected to the inner sides of the two moving rings (32). Two extrusion screws (311) are threaded through the outer walls of the two fixed rings (31) and extend to the inner sides of the two fixed frames (312). Two sets of wedge grooves are opened on the outer walls of the two fixed rings (31), and two sets of wedge blocks (33) are slidably installed on the inner walls of the two sets of wedge grooves. The outer walls of the two sets of wedge blocks (33) are fixedly connected to the inner sides of the two moving rings (32).
6. A high-temperature resistant connection device for steam pipes in a high-temperature gas-cooled reactor nuclear power plant according to claim 2, characterized in that: The two first flanges (36) and the two second flanges (42) are connected by two sets of bolts (43), and the corrugated compensator (41) has a compensation amount of more than 10 mm.