Explosion-proof and noise-reducing valve shell structure for nuclear power

Abstract

This application discloses an explosion-proof and noise-reducing valve shell structure for nuclear power plants, belonging to the field of valve technology. It mainly includes: a valve shell with water pipes connected to both ends, an installation pipe connected to the upper end of the valve shell, an explosion-proof assembly mounted on the valve shell, the explosion-proof assembly including two explosion-proof covers fitted onto the valve shell, each explosion-proof cover having a limiting hole at both ends, a main reinforcement assembly mounted on the explosion-proof covers, the main reinforcement assembly including reinforcing semi-rings mounted at both ends of the explosion-proof covers, the lower ends of the reinforcing semi-rings embedded in the limiting holes, and an auxiliary reinforcement assembly mounted on the installation pipe. This explosion-proof and noise-reducing valve shell structure for nuclear power plants, by using the two explosion-proof covers of the explosion-proof assembly to wrap around the outer wall of the valve shell and cover the lower part of the water pipes, can resist external impacts, reduce the occurrence of local deformation or cracking of the valve shell, and improve the explosion-proof threshold of the valve.

Description

Technical Field

[0001] This application relates to the field of valve technology, specifically to a valve shell structure for nuclear power plants that is explosion-proof and noise-reducing. Background Technology

[0002] During the normal operation of a nuclear power plant, valves, as key control components of the piping system, need to withstand the effects of high temperature, high pressure and radioactive media for a long time. Specifically, the operating conditions in a nuclear power plant are usually maintained at a high temperature of several hundred degrees Celsius and a high pressure of tens of megapascals, and the media may be radioactive. This places extremely stringent requirements on the explosion-proof, corrosion-resistant and sealing performance of valves.

[0003] Nuclear power plant valves control the flow of media (water, steam, etc.) through internal structures (such as valve cores and valve seats). Driven by a device (electric, pneumatic, etc.), the valve core moves, changing the flow path or its opening degree. Combined with a sealing structure, this prevents leakage of radioactive media. In nuclear power plant systems, valves achieve functions such as pressure and flow regulation and safety shut-off, ensuring the safe and stable operation of the system.

[0004] During valve maintenance or maintenance of surrounding equipment, tools, parts or maintenance equipment may accidentally impact the valve body. However, some existing nuclear power plant valve shells are not suitable for overall explosion protection. When an external force impacts the valve shell, it may cause local deformation or even breakage of the valve shell, reducing the explosion protection threshold of the valve shell and thus causing the risk of radioactive media leakage.

[0005] Valve housing structures are prone to stress concentration under high temperature and high pressure conditions. If subjected to accidental impact, the stress concentration area may become a crack source, further reducing the explosion-proof threshold of the valve housing and affecting the operational safety of nuclear power plants. Therefore, it is necessary to provide an explosion-proof and noise-reducing valve housing structure for nuclear power plants to solve the above problems.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0007] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide an explosion-proof and noise-reducing valve shell structure for nuclear power plants, which solves the problems of insufficient explosion protection, easy breakage under external impact, leakage caused by stress concentration, and reduced explosion protection threshold of existing nuclear power valve shells.

[0008] The technical solution adopted by this application to solve its technical problem is: a valve shell structure for nuclear power plants that is explosion-proof and noise-reducing, comprising:

[0009] A valve housing, with water pipes connected to both ends of the valve housing and an installation pipe connected to the upper end of the valve housing;

[0010] An explosion-proof assembly is installed on the valve housing. The explosion-proof assembly includes two explosion-proof covers that fit onto the valve housing. Each explosion-proof cover has a limiting hole at both ends.

[0011] The main reinforcement component is installed on the explosion-proof cover. The main reinforcement component includes reinforcement semi-rings installed at both ends of the explosion-proof cover. The lower ends of the reinforcement semi-rings are all embedded in the limiting holes.

[0012] An auxiliary reinforcement component is installed on the mounting tube. The auxiliary reinforcement component includes an assembly ring installed at one end of the mounting tube. Multiple guide rods are installed on the assembly ring. A reinforcement ring slides on the guide rods. Intermediate frames are installed on both sides of the reinforcement ring. The explosion-proof cover is provided with positioning grooves that are adapted to the intermediate frames.

[0013] Furthermore, two sliding grooves are provided in the limiting hole, and a sliding plate adapted to the sliding groove is installed at the location of the reinforcing semi-ring in the limiting hole.

[0014] Furthermore, the limiting hole is opened in a vertical state, which is suitable for the embedding of the reinforcing semi-ring.

[0015] Furthermore, the two ends of the explosion-proof cover cover the lower part of the water pipe.

[0016] Furthermore, the reinforcing semi-ring covers the upper part of the water pipe.

[0017] Furthermore, the valve housing is coated with a metal-based damping composite coating.

[0018] Furthermore, the bottom of each explosion-proof cover is provided with multiple weight-reducing holes.

[0019] The beneficial effects of this application are as follows: The explosion-proof and noise-reducing valve shell structure for nuclear power plants provided by this application, through the two explosion-proof covers of the explosion-proof components wrapping the outer wall of the valve shell and covering the lower part of the water pipe, can resist external impact, reduce the occurrence of local deformation or cracking of the valve shell, and improve the explosion-proof threshold of the valve. The reinforcement semi-ring of the main reinforcement component covers the upper part of the water pipe and works with the explosion-proof cover to reinforce the water pipe and valve shell, enhancing the structural strength. At the same time, the auxiliary reinforcement component is connected to the explosion-proof cover through the assembly ring, guide rod, reinforcement ring and intermediate frame to reinforce the installation pipe part and improve the overall structural stability.

[0020] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a first three-dimensional structural schematic diagram of a nuclear power plant valve shell structure with explosion-proof and noise-reducing properties according to an embodiment of this application;

[0023] Figure 2 This is a three-dimensional structural diagram of the valve body assembly, main reinforcement assembly, and auxiliary reinforcement assembly according to embodiments of this application;

[0024] Figure 3 This is a three-dimensional structural diagram of the explosion-proof component and the auxiliary reinforcement component according to an embodiment of this application;

[0025] Figure 4 This is a second three-dimensional structural schematic diagram of a nuclear power plant valve shell structure with explosion-proof and noise reduction according to an embodiment of this application;

[0026] Figure 5 This is a three-dimensional structural diagram of the explosion-proof component, the main reinforcement component, and the auxiliary reinforcement component according to embodiments of this application.

[0027] The following are the labeling elements in the figure:

[0028] 1. Valve body assembly; 11. Valve shell; 12. Water pipe; 13. Mounting pipe; 14. First flange; 15. Second flange; 2. Explosion-proof assembly; 21. Explosion-proof cover; 22. Weight reduction hole; 23. Limiting hole; 24. Slide groove; 3. Main reinforcement assembly; 31. Reinforcing half ring; 32. Slide plate; 4. Auxiliary reinforcement assembly; 41. Assembly ring; 42. Guide rod; 43. Reinforcing ring; 44. Intermediate frame; 45. Positioning groove. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0031] like Figure 1 and Figure 2As shown, this application provides an explosion-proof and noise-reducing valve shell structure for nuclear power plants, including a valve body assembly 1. The valve body assembly 1 constitutes the main structure of the valve and is used to control the flow of the medium and realize the connection with the pipeline and internal components of the valve. The valve body assembly 1 includes a valve shell 11, which serves as the main body of the entire valve structure. The interior is used to accommodate components such as the valve core (not shown in the figure) and the valve seat (not shown in the figure) to control the flow of the medium (water, steam, etc.) and withstand the effects of high temperature, high pressure and radioactive media. At the same time, the inner wall of the valve shell 11 is coated with a metal-based damping composite coating (not shown in the figure). When the flow of the medium causes the valve to vibrate and generate noise, the damping coating converts the mechanical vibration energy into heat energy through intermolecular friction, reduces the vibration amplitude, and thus reduces noise radiation, achieving the effect of noise reduction.

[0032] Water pipes 12 are connected to both ends of the valve body 11. These water pipes 12 are channels for the medium (water, steam, etc.) to enter and exit the valve, enabling the medium to flow in the pipeline. A first flange 14 is fixed to one end of the water pipe 12. The first flange 14 is connected to an external pipeline by bolts, so that the valve structure is firmly connected to the entire pipeline system, ensuring the normal transmission of the medium. An installation pipe 13 is connected to the upper end of the valve body 11. This installation pipe 13 is used to install an electric or pneumatic device to drive the valve core to move, thereby controlling the flow channel or opening degree inside the valve body 11. A second flange 15 is fixed to one end of the installation pipe 13. This second flange 15 ensures the stable installation of the electric or pneumatic device to the valve body 11 structure, so that the electric or pneumatic device can effectively drive the valve core to move.

[0033] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, an explosion-proof component 2 is installed on the valve housing 11. The explosion-proof component 2 wraps around the valve housing 11 to form a protective layer, resisting external impact and preventing rupture and leakage. The explosion-proof component 2 includes two explosion-proof covers 21 that fit against the outer wall of the valve housing 11. The two explosion-proof covers 21 are connected to each other by bolts, thereby wrapping around the outer wall of the valve housing 11. The two ends of the explosion-proof covers 21 cover the outer wall of the lower part of the water pipe 12, forming an overall explosion-proof protective layer, resisting external impact, preventing local deformation or rupture of the valve housing 11, increasing the explosion-proof threshold, and reducing the occurrence of radioactive medium leakage problems.

[0034] Multiple weight-reducing holes 22 are provided at the bottom of the explosion-proof cover 21. These weight-reducing holes 22 reduce the weight of the explosion-proof cover 21 by reducing the amount of material used, so as not to make the overall weight of the valve too heavy, making it easier for the staff to install and disassemble. Limiting holes 23 are provided at both ends of the explosion-proof cover 21. The limiting holes 23 are opened in a vertical state, and two sliding grooves 24 are provided in the limiting holes 23 respectively.

[0035] like Figures 1-5As shown, main reinforcement components 3 are installed at both ends of the explosion-proof cover 21. The main reinforcement components 3 are used to reinforce the upper part of the water pipe 12 and enhance the explosion-proof performance. The main reinforcement components 3 include reinforcement semi-rings 31 installed at both ends of the explosion-proof cover 21. The reinforcement semi-rings 31 cover the outer wall of the upper part of the water pipe 12 and work with the explosion-proof cover 21 to reinforce the water pipe 12 and valve shell 11, improve the structural strength, disperse stress, prevent stress concentration from causing cracks, and further improve the explosion-proof performance. The lower ends of the reinforcement semi-rings 31 are all embedded in the limiting holes 23.

[0036] A sliding plate 32 adapted to the sliding groove 24 is fixed at the position of the reinforcing half-ring 31 at the limiting hole 23. The sliding plate 32 slides in the sliding groove 24 to realize the installation and position adjustment of the reinforcing half-ring 31, ensuring that the reinforcing half-ring 31 can accurately cover the upper outer wall of the water pipe 12 and be firmly connected to the explosion-proof cover 21. The reinforcing half-ring 31 and the explosion-proof cover 21 are fastened to the limiting hole 23 by bolts. The bolt connection facilitates the disassembly and installation of the reinforcing half-ring 31 by the staff.

[0037] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, an auxiliary reinforcement component 4 is installed on the mounting tube 13. The auxiliary reinforcement component 4 reinforces the mounting tube 13 and is connected to the explosion-proof component 2 to improve the overall structural stability. The auxiliary reinforcement component 4 includes an assembly ring 41 fixed to the outer wall of one end of the mounting tube 13. The assembly ring 41 serves as the basic mounting component of the auxiliary reinforcement component 4 and is used to support and fix other components. Multiple guide rods 42 are fixed on the assembly ring 41. A reinforcement ring 43 slides on the guide rods 42. The guide rods 42 are used to support the reinforcement ring 43 and guide it to slide on the guide rods 42, so that the reinforcement ring 43 can move up and down along the outer wall of the mounting tube 13.

[0038] Intermediate frames 44 are fixed on both sides of the reinforcing ring 43. Each of the two explosion-proof covers 21 is provided with a positioning groove 45 that is compatible with the intermediate frame 44. The intermediate frame 44 and the explosion-proof cover 21 are fastened to the positioning groove 45 by bolts, so as to realize the connection between the reinforcing ring 43 and the explosion-proof cover 21, so that the auxiliary reinforcing component 4 and the explosion-proof component 2 jointly reinforce the structure of the valve body 11.

[0039] Working principle: When the nuclear power plant valve shell structure is put into use, the medium (water, steam, etc.) flows into the valve shell 11 through the water pipe 12. The flow of the medium is controlled by the cooperation of the valve core and the valve seat inside the valve shell 11. The electric or pneumatic device on the mounting pipe 13 can drive the valve core to move, so as to change the opening or closing of the flow channel.

[0040] In terms of explosion protection, the two explosion-proof covers 21 of the explosion-proof component 2 are connected by bolts and wrapped around the outer wall of the valve shell 11. Their two ends cover the lower outer wall of the water pipe 12, forming an overall explosion-proof protective layer. When the valve shell 11 is hit by external force, the explosion-proof cover 21 can resist the impact force, prevent the valve shell 11 from being deformed or cracked locally, and improve the explosion-proof threshold. The reinforcing half ring 31 of the main reinforcing component 3 covers the upper outer wall of the water pipe 12, and its lower end is embedded in the limiting hole 23 of the explosion-proof cover 21. The sliding plate 32 slides in the sliding groove 24 and is fastened to the explosion-proof cover 21 by bolts. It works with the explosion-proof cover 21 to reinforce the water pipe 12 and the valve shell 11, enhance the structural strength, disperse stress, and prevent stress concentration from causing cracks.

[0041] In the auxiliary reinforcement component 4, the assembly ring 41 is fixed to the outer wall of one end of the mounting tube 13, the guide rod 42 supports the reinforcement ring 43 and guides it to slide up and down along the outer wall of the mounting tube 13, and the intermediate frame 44 on both sides of the reinforcement ring 43 is fastened to the positioning groove 45 of the explosion-proof cover 21 by bolts, so as to realize the connection between the auxiliary reinforcement component 4 and the explosion-proof component 2, and to reinforce the mounting tube 13, thereby improving the overall structural stability. In terms of noise reduction, the metal-based damping composite coating on the inner wall of the valve body 11 can convert mechanical vibration energy into heat energy through intermolecular friction when the medium flow causes the valve to vibrate and generate noise, thereby reducing the vibration amplitude and reducing noise radiation, thus achieving the noise reduction effect.

[0042] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An explosion-proof and noise-reducing valve housing structure for nuclear power, characterized by: include: A valve housing (11) is provided with a water pipe (12) connected to both ends of the valve housing (11) and an installation pipe (13) connected to the upper end of the valve housing (11). An explosion-proof assembly (2) is installed on the valve housing (11). The explosion-proof assembly (2) includes two explosion-proof covers (21) that fit onto the valve housing (11). Each of the two ends of the explosion-proof cover (21) is provided with a limiting hole (23). The main reinforcement component (3) is installed on the explosion-proof cover (21). The main reinforcement component (3) includes reinforcement semi-rings (31) installed at both ends of the explosion-proof cover (21). The lower ends of the reinforcement semi-rings (31) are embedded in the limiting holes (23). Auxiliary reinforcement component (4) is installed on the mounting tube (13). The auxiliary reinforcement component (4) includes an assembly ring (41) installed at one end of the mounting tube (13). Multiple guide rods (42) are installed on the assembly ring (41). A reinforcement ring (43) slides on the guide rod (42). An intermediate frame (44) is installed on both sides of the reinforcement ring (43). The explosion-proof cover (21) is provided with a positioning groove (45) that matches the intermediate frame (44).

2. The explosion-proof and noise-reducing valve shell structure for nuclear power plants according to claim 1, characterized in that: Two sliding grooves (24) are provided in the limiting hole (23), and a sliding plate (32) that is compatible with the sliding groove (24) is installed on the reinforcing half ring (31) at the limiting hole (23).

3. The explosion-proof and noise-reducing valve shell structure for nuclear power plants according to claim 1, characterized in that: The limiting hole (23) is opened in a vertical state, which is suitable for the embedding of the reinforcing half ring (31).

4. The explosion-proof and noise-reducing valve housing structure for nuclear power plants according to claim 1, characterized in that: The two ends of the explosion-proof cover (21) cover the lower part of the water pipe (12).

5. The explosion-proof and noise-reducing valve housing structure for nuclear power plants according to claim 1, characterized in that: The reinforced semi-ring (31) covers the upper part of the water pipe (12).

6. The explosion-proof and noise-reducing valve shell structure for nuclear power plants according to claim 1, characterized in that: The valve body (11) is coated with a metal-based damping composite coating.

7. The explosion-proof and noise-reducing valve shell structure for nuclear power plants according to claim 1, characterized in that: The bottom of each explosion-proof cover (21) is provided with multiple weight-reducing holes (22).

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