Nuclear grade high temperature and high pressure packing five valve group

Abstract

The utility model discloses a nuclear grade high temperature high pressure packing five valve groups, including valve body, the inside of valve body is equipped with a plurality of working oil circuit, balance oil circuit, emptying oil circuit, and is equipped with balance oil circuit between the adjacent working oil circuit, and each working oil circuit is connected with an emptying oil circuit, and the emptying oil circuit leads to the outside of valve body, and is equipped with an independent control valve on each oil circuit, and the import and export of working oil circuit are located at the front end face and rear end face of valve body, and the control valve is located at the upper end face and left and right two side end faces of valve body, and the discharge port of emptying oil circuit is located at the left and right two side end faces of valve body.

Description

Technical Field

[0001] This invention relates to a nuclear-grade high-temperature and high-pressure packing five-valve assembly. Background Technology

[0002] In high-temperature and high-pressure environments, five-valve manifolds are widely used as key components to ensure the safe and reliable opening, closing, and regulation of liquid or gaseous media in instrument control, measurement, sampling, and sewage discharge systems. Existing high-temperature and high-pressure bellows five-valve manifolds, such as those described in patent CN107044564A, achieve significant results in ensuring high sealing performance and vibration resistance through an integrated bellows sealing structure and a steel ball linkage mechanism, making them suitable for high-pressure, high-temperature, and hazardous conditions involving toxic or harmful substances. This structure primarily relies on component interfaces (i.e., control interfaces F1 to F5) located on multiple side and bottom walls of the valve body, which connect to external pipelines to achieve the introduction, discharge, and balancing regulation of the working fluid.

[0003] However, in the existing bellows five-valve manifold structure, the control valves are mainly arranged on the upper end face and bottom or multiple side walls of the valve body. In some arrangements, this can lead to complex internal channels, difficulty in controlling the flow path, and low space utilization efficiency. Especially in situations where multiple oil circuits need to be arranged in parallel and controlled at multiple points, the existing design struggles to balance the rationality of the oil circuit configuration with the compactness of the control valve arrangement.

[0004] Furthermore, because the control valve is traditionally located at the junction of different oil circuits, the fluid impact force and sealing stress on the valve body are not easily distributed evenly, thus affecting the stability and lifespan of the valve's opening and closing. At the same time, the complex layout also increases maintenance difficulty and manufacturing costs, which is not conducive to long-term stable operation in high-reliability nuclear-grade equipment. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of the existing technology and provide a nuclear-grade high-temperature and high-pressure packing five-valve assembly.

[0006] A nuclear-grade high-temperature and high-pressure packing five-valve assembly includes a valve body. The valve body has multiple working oil passages, a balancing oil passage, and a venting oil passage inside. A balancing oil passage is provided between adjacent working oil passages. Each working oil passage is connected to a venting oil passage, which leads to the outside of the valve body. Each oil passage is equipped with an independent control valve. The inlet and outlet of the working oil passage are located on the front and rear faces of the valve body, respectively. The control valve is located on the upper face and left and right side faces of the valve body. The outlet of the venting oil passage is located on the left and right side faces of the valve body.

[0007] Furthermore, there are two working oil lines and two venting oil lines, and one balancing oil line.

[0008] Furthermore, the two working oil circuits are arranged parallel to each other along the front and rear directions of the valve body.

[0009] Furthermore, the left and right end faces of the valve body are provided with a first valve chamber connected to the working oil circuit. A control valve is provided in the first valve chamber. The working oil circuit includes a front oil circuit and a rear oil circuit. The front oil circuit is connected to the first valve chamber through a first passage, and the rear oil circuit is connected to the first valve chamber through a second passage. The control valve cooperates with the first passage or the second passage.

[0010] Furthermore, the upper end face of the valve body is provided with a second valve chamber connected to the balance oil circuit. The second valve chamber is provided with a control valve. The balance oil circuit includes a left section oil circuit and a right section oil circuit. The left section oil circuit is connected to the second valve chamber through a third passage, and the right section oil circuit is connected through a fourth passage. The control valve cooperates with the third passage or the fourth passage.

[0011] Furthermore, the upper end face of the valve body is provided with a third valve chamber that is connected to two drain oil passages respectively. A control valve is provided in the third valve chamber. The third valve chamber is connected to the working oil passage through a fifth passage, and the control valve cooperates with the fifth passage.

[0012] Furthermore, the control valve includes a valve stem, a valve core, and a valve seat. One end of the valve stem is provided with a blind hole, and the valve core is rotatably connected in the blind hole. The outer arc surface of the valve core is provided with an annular groove, and the edge of the blind hole is provided with an inward limiting stop. The limiting stop is located in the annular groove and connected to the groove wall of the annular groove.

[0013] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0014] 1. Optimized control valve structure design improves sealing performance and opening / closing stability.

[0015] The control valve structure employed in this technical solution achieves stable and reliable mechanical limiting and axial positioning by rotatably embedding the valve core inside the blind hole of the valve stem and setting an annular groove on the outside of the valve core, in conjunction with the inward limiting flange of the blind hole opening. This design effectively avoids axial displacement of the valve core under the impact of high-temperature and high-pressure fluids, ensuring sealing reliability and valve core alignment accuracy during the opening and closing process, fundamentally improving the service life and response performance of the control valve.

[0016] 2. More uniform stress distribution under fluid force improves the reliability of the control valve.

[0017] The contact structure between the annular groove and the limiting flange effectively disperses stress concentration in the pressure-bearing parts of the control valve, especially under conditions of multiple oil circuit intersections, high-frequency switching operations, or strong pulsation. This significantly reduces the risk of wear and fatigue failure between the valve core and seat. Therefore, this control valve design is more wear-resistant, shock-resistant, and stable during long-term operation, making it suitable for the high reliability standards required for nuclear-grade applications.

[0018] 3. Enhanced structural compactness facilitates high-density oil circuit configuration.

[0019] Compared to the control valves commonly found in existing technologies that are arranged on multiple sides or bottom of the valve body, the above-mentioned control valve structure allows for a more concentrated and compact spatial layout. It is especially suitable for use in environments with high passage density, multi-point control, and limited space. It reduces the intersection of internal passages within the valve body, optimizes the oil circuit routing, and helps to achieve modular design of the oil circuit system.

[0020] 4. Simplified manufacturing and maintenance processes reduce manufacturing costs and the difficulty of subsequent maintenance.

[0021] Because the control valve's sealing structure is achieved through standardized machining of blind holes and modular rotational insertion, the overall assembly process is simpler. During maintenance, the valve core or limiting components can be quickly replaced, avoiding the need to disassemble the entire valve body or reset the oil circuit structure, thereby improving on-site maintenance efficiency and reducing maintenance costs. Furthermore, the blind hole structure facilitates pre-loading of the valve core's sealing structure, increasing the factory pass rate.

[0022] 5. Improved system safety to adapt to high temperature, high pressure, and toxic working conditions.

[0023] In conjunction with the overall five-valve system layout, this control valve solution combines excellent environmental sealing and thermal stability, and has superior sealing and isolation performance in high-temperature, high-pressure, toxic or corrosive fluid systems. This helps ensure the safety of sampling, measurement, sewage discharge and flow control operations, and meets the stringent technical requirements of the nuclear energy, chemical and special equipment fields. Attached Figure Description

[0024] Figure 1 This is an external schematic diagram of a five-valve manifold;

[0025] Figure 2 This is a top view of the five-valve manifold;

[0026] Figure 3 This is the front view of the five-valve manifold;

[0027] Figure 4 yes Figure 2 A cross-sectional view along the AA direction;

[0028] Figure 5 yes Figure 4 A diagram with the control valve removed;

[0029] Figure 6 yes Figure 2 Cross-sectional view along the BB direction;

[0030] Figure 7 yes Figure 6 A diagram with the control valve removed;

[0031] Figure 8yes Figure 3 A schematic diagram in the CC direction;

[0032] Figure 9 This is a schematic diagram of the internal structure of the control valve;

[0033] In the diagram, 1 is the valve body, 2 is the control valve, 3 is the inlet, 4 is the outlet, 5 is the first valve chamber, 6 is the second valve chamber, 7 is the left oil passage, 8 is the third passage, 9 is the fourth passage, 10 is the right oil passage, 11 is the third valve chamber, 12 is the drain oil passage, 13 is the front oil passage, 14 is the fifth passage, 15 is the first passage, 16 is the second passage, 17 is the rear oil passage, 18 is the valve stem, 19 is the valve core, 20 is the annular groove, and 21 is the limit stop. Detailed Implementation

[0034] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0035] A nuclear-grade high-temperature and high-pressure packing five-valve assembly includes a valve body 1. The valve body 1 has multiple working oil passages, a balancing oil passage, and a drain oil passage 12 inside. A balancing oil passage is provided between adjacent working oil passages. Each working oil passage is connected to a drain oil passage 12. The drain oil passage 12 leads to the outside of the valve body 1. Each oil passage is equipped with an independent control valve 2. The inlet 3 and outlet 4 of the working oil passage are located on the front end face and the rear end face of the valve body 1, respectively. The control valve 2 is located on the upper end face and the left and right end faces of the valve body 1, respectively. The outlet 4 of the drain oil passage 12 is located on the left and right end faces of the valve body 1.

[0036] This five-valve manifold structure achieves multi-channel precise control of the fluid system in high-temperature and high-pressure environments by arranging multiple working oil circuits, balancing oil circuits, and venting oil circuits 12 inside the valve body 1. The working oil circuits transmit the main hydraulic medium, and balancing oil circuits are provided between adjacent working oil circuits to achieve oil pressure balance between the two circuits and prevent system instability caused by pressure differences. Each working oil circuit is equipped with a venting oil circuit 12, which connects to an external drain or sampling port, allowing for real-time sampling and analysis or drainage of the liquid in the working oil circuit. Each oil circuit is equipped with an independent control valve 2, located in different positions on the valve body 1, resulting in a compact overall structure, flexible operation, and high control precision.

[0037] This implementation method features a compact structure, high functional integration, and strong safety, making it suitable for nuclear-grade high-temperature and high-pressure applications. Through independently controlled multi-oil circuit configuration, it achieves precise fluid delivery, automatic pressure balancing, and convenient drainage, improving the stability and reliability of system operation. Simultaneously, the multi-directional arrangement of control valves 2 facilitates installation and maintenance, meeting the technical requirements of compact equipment space.

[0038] In one possible implementation, there are two working oil passages and two venting oil passages 12, and one balancing oil passage.

[0039] In this embodiment, two working oil circuits respectively undertake the hydraulic control functions of the left and right channels. Each working oil circuit is equipped with an independent venting oil circuit 12 to realize parallel liquid sampling and drainage functions. A balancing oil circuit is set in the middle to connect the two working oil circuits, which is used to dynamically adjust the oil pressure between them to achieve pressure balance.

[0040] This approach simplifies the structure while enabling multi-functional control, giving the system dual-loop regulation and venting capabilities, and allowing it to automatically achieve pressure balancing during operation, thus improving the safety and stability of the system.

[0041] In one possible implementation, the two working oil passages are arranged parallel to each other along the front-rear direction of the valve body 1.

[0042] Arranging the two working oil passages in parallel along the front-to-back direction within the valve body 1 helps simplify the internal passage design, reduce fluid cross paths, improve fluid transmission efficiency, and enhance the overall compactness of the valve assembly.

[0043] This implementation method facilitates pipeline connection and valve assembly integration, reduces pressure drop and flow resistance, and improves operating efficiency. It is suitable for space-constrained nuclear power plants or high-pressure systems.

[0044] In one possible implementation, the left and right end faces of the valve body 1 are provided with a first valve chamber 5 connected to the working oil circuit. The first valve chamber 5 is provided with a control valve 2. The working oil circuit includes a front oil circuit 13 and a rear oil circuit 17. The front oil circuit 13 is connected to the first valve chamber 5 through a first passage 15, and the rear oil circuit 17 is connected to the first valve chamber 5 through a second passage 16. The control valve 2 cooperates with the first passage 15 or the second passage 16.

[0045] The first valve chamber 5 connects the front and rear working oil circuits, and the control valve 2 installed therein allows for selective conduction, enabling segmented control and switching of the working oil circuit sections, thereby improving the operational flexibility and maintainability of the oil circuit.

[0046] This enables the system to have a higher degree of modularity and more precise operation control, making it easier to achieve local oil circuit adjustment, isolation and maintenance, and improving the reliability and operating efficiency of the entire hydraulic system.

[0047] In one possible implementation, the upper end face of the valve body 1 is provided with a second valve chamber 6 connected to the balance oil circuit. The second valve chamber 6 is provided with a control valve 2. The balance oil circuit includes a left section oil circuit 7 and a right section oil circuit 10. The left section oil circuit 7 is connected to the second valve chamber 6 through a third passage 8, and the right section oil circuit 10 is connected through a fourth passage 9. The control valve 2 cooperates with the third passage 8 or the fourth passage 9.

[0048] In this structure, the second valve chamber 6 controls the conduction state of both sides of the balance oil circuit, and the left and right sections of the oil circuit 10 are connected through the third passage 8 and the fourth passage 9 respectively, so as to realize the dynamic adjustment of the oil pressure difference between the working oil circuits.

[0049] It can effectively solve the system instability problem caused by pressure difference in the working oil circuit, maintain the stable operation of the entire hydraulic system, and improve the safety performance of high-pressure equipment under long-term operation.

[0050] In one possible implementation, the upper end face of the valve body 1 is provided with a third valve chamber 11 that is connected to two drain oil passages 12 respectively. The third valve chamber 11 is provided with a control valve 2. The third valve chamber 11 is connected to the working oil passage through a fifth passage. The control valve 2 cooperates with the fifth passage 14.

[0051] The third valve chamber 11 connects the drain oil circuit 12 with the working oil circuit, and controls the opening and closing state of the fifth passage through the control valve 2, thereby realizing the discharge or sampling operation of liquid in any working oil circuit.

[0052] This design improves the efficiency and safety of venting operations, making it suitable for real-time liquid status monitoring and rapid depressurization in high-pressure systems, and helps ensure controllable system operation and environmental safety.

[0053] In one possible implementation, the control valve 2 includes a valve stem 18, a valve core 19, and a valve seat. One end of the valve stem 18 is provided with a blind hole, and the valve core 19 is rotatably connected in the blind hole. The outer arc surface of the valve core 19 is provided with an annular groove 20. The edge of the opening of the blind hole is provided with an inward limiting stop 21. The limiting stop 21 is located in the annular groove 20 and is connected to the groove wall of the annular groove 20.

[0054] The control valve 2 achieves precise opening and closing under high temperature and high pressure through a unique valve core 19 embedded structure. The annular groove 20 and the limiting flange 21 cooperate to form axial positioning, preventing the valve core 19 from losing control of displacement and ensuring sealing and switching reliability.

[0055] This structure can effectively prevent the valve core 19 from dislodging due to high pressure impact, improve sealing and operational stability, adapt to high-frequency opening and closing and harsh working environments, and meet the strict safety requirements of nuclear-grade systems.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A nuclear-grade high-temperature and high-pressure packed five-valve assembly, characterized in that, The valve includes a valve body, which has multiple working oil passages, a balancing oil passage, and a drain oil passage inside. A balancing oil passage is provided between adjacent working oil passages. Each working oil passage is connected to a drain oil passage, which leads to the outside of the valve body. Each oil passage is equipped with an independent control valve. The inlet and outlet of the working oil passage are located on the front and rear ends of the valve body, respectively. The control valve is located on the upper end and left and right end faces of the valve body. The outlet of the drain oil passage is located on the left and right end faces of the valve body.

2. The five-valve assembly according to claim 1, characterized in that, There are two working oil lines and two venting oil lines, and one balancing oil line.

3. The five-valve assembly according to claim 2, characterized in that, The two working oil circuits are arranged parallel to each other along the front and rear direction of the valve body.

4. The five-valve assembly according to claim 3, characterized in that, The valve body has a first valve chamber on both the left and right ends connected to the working oil circuit. The first valve chamber is equipped with a control valve. The working oil circuit includes a front oil circuit and a rear oil circuit. The front oil circuit is connected to the first valve chamber through a first passage, and the rear oil circuit is connected to the first valve chamber through a second passage. The control valve is in cooperation with the first passage or the second passage.

5. The five-valve assembly according to claim 4, characterized in that, The upper end face of the valve body is provided with a second valve chamber connected to the balance oil circuit. The second valve chamber is provided with a control valve. The balance oil circuit includes a left section oil circuit and a right section oil circuit. The left section oil circuit is connected to the second valve chamber through a third passage, and the right section oil circuit is connected through a fourth passage. The control valve is in cooperation with the third passage or the fourth passage.

6. The five-valve assembly according to claim 5, characterized in that, The upper end face of the valve body is provided with a third valve chamber that is connected to two drain oil passages respectively. The third valve chamber is provided with a control valve. The third valve chamber is connected to the working oil passage through a fifth passage. The control valve cooperates with the fifth passage.

7. The five-valve assembly according to claim 1, characterized in that, The control valve includes a valve stem, a valve core, and a valve seat. One end of the valve stem is provided with a blind hole, and the valve core is rotatably connected in the blind hole. The outer arc surface of the valve core is provided with an annular groove. The edge of the blind hole is provided with an inward limiting stop, which is located in the annular groove and connected to the groove wall of the annular groove.

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