Pressure stabilizing system for self-operated pressure regulating valve of nuclear power plant
By introducing a dual-pipeline structure into the self-regulating pressure regulating valve stabilization system of nuclear power plants and switching between different models of self-regulating pressure regulating valves, the problem of sealing surface damage during overhaul of self-regulating pressure regulating valves was solved, thereby improving the stability and maintenance convenience of the equipment.
Patent Information
- Application Number
- CN202520246854.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-02-14
AI Technical Summary
During overhauls, the downstream pressure of self-operated pressure regulating valves in nuclear power plants fluctuates frequently, causing damage to the sealing surfaces of the valve core and valve seat, resulting in air leakage and affecting the safe and stable operation of the equipment.
Design a self-regulating pressure regulating valve stabilization system for nuclear power plants, including first and second pipelines, which are respectively connected to different types of self-regulating pressure regulating valves. By switching pipelines, the appropriate valve can be selected for pressure regulation, avoiding frequent opening and closing of the valve core, enhancing equipment stability, and providing backup valves for easy maintenance.
It broadens the applicable flow range, avoids damage to the valve core sealing surface, improves the stability and maintenance convenience of the equipment, and ensures the safe operation of nuclear power plants.
Smart Images
Figure CN223609916U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to nuclear power technology field especially relates to a nuclear power plant self -force pressure regulating valve pressure stabilizing system. BACKGROUND
[0002] A nuclear power plant is configured with multiple self -force pressure regulating valves, and the self -force pressure regulating valve multiple internal leakage problem leads to the overpressure or pressure of downstream equipment is too low, influences unit safe and stable operation. The main reason is that during the overhaul, the nitrogen gas consumption of the valve downstream is large, the downstream pressure fluctuates frequently, the sealing surface of the valve core and the valve seat of the self -force pressure regulating valve frequently knocks, thereby causing the sealing surface damage. SUMMARY
[0003] The technical problem to be solved by the utility model lies in providing a nuclear power plant self -force pressure regulating valve pressure stabilizing system.
[0004] The utility model adopts the technical scheme in the solution to the technical problem: construct a kind of nuclear power plant self -force pressure regulating valve pressure stabilizing system, including first pipeline, the first pipeline has opposite first end and second end, the first pipeline is equipped with first stop valve, first three-way valve, first self -force pressure regulating valve, second three-way valve and second stop valve in order from its first end to its second end;
[0005] The first three-way valve has first valve port, second valve port and third valve port, the first valve port is connected with the outlet end of the first stop valve, and the second valve port is connected with the inlet end of the first self -force pressure regulating valve;The second three-way valve has first interface, second interface and third interface, the first interface is connected with the outlet end of the first self -force pressure regulating valve, and the second interface is connected with the inlet end of the second stop valve;
[0006] The nuclear power plant self -force pressure regulating valve pressure stabilizing system further includes second pipeline, one end of the second pipeline is connected with the third valve port, the other end of the second pipeline is connected with the third interface, and the second pipeline is equipped with second self -force pressure regulating valve.
[0007] In some embodiments, the first pipeline is also provided with at least one first filter close to its first end.
[0008] In some embodiments, the first pipeline is provided with a first pressure gauge near the first end thereof, and a second pressure gauge near the second end thereof.
[0009] In some embodiments, the first pressure gauge has a range of 0-14 bar, and the second pressure gauge has a range of 0-3 bar.
[0010] In some embodiments, the first self-operated pressure regulating valve has a pressure regulating range of 1.1-1.5 bar, and a maximum flow of 50 Nm3 / h.
[0011] In some embodiments, the second self-operated pressure regulating valve has a pressure regulating range of 1.1-1.5 bar, and a maximum flow of 20 Nm3 / h.
[0012] In some embodiments, the pipeline between the third valve port and the inlet end of the second self-operated pressure regulating valve is provided with at least one second filter.
[0013] In some embodiments, the first pipeline is provided with a first flow meter near the first end thereof, and a second flow meter near the second end thereof.
[0014] In some embodiments, the first end and the second end of the first pipeline are each provided with a quick connector.
[0015] In some embodiments, the first end and the second end of the first pipeline are each provided with a connecting flange.
[0016] The utility model has the following beneficial effects: the nuclear power plant self-operated pressure regulating valve pressure stabilizing system comprises a first pipeline and a second pipeline, the first pipeline and the second pipeline can be switched as required, the first self-operated pressure regulating valve or the second self-operated pressure regulating valve can be selected for pressure regulating, the flow range can be widened, the sealing surface can be prevented from being damaged due to frequent opening and closing of the valve core, and the equipment stability can be improved. In addition, the first self-operated pressure regulating valve and the second self-operated pressure regulating valve can be used as backup for each other, in the case of damage of one self-operated pressure regulating valve, the first three-way valve and the second three-way valve can be isolated for maintenance without affecting normal use. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical scheme of the utility model, the utility model will be further described below in combination with the drawings and embodiments. It should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation on the scope. Other related drawings can also be obtained by those skilled in the art without creative labor. In the drawings:
[0018] Figure 1is the structural schematic diagram of the self-operated pressure regulating valve pressure stabilizing system of the nuclear power plant in some embodiments of the utility model;
[0019] Figure 2 is the structural schematic diagram of the self-operated pressure regulating valve pressure stabilizing system of the nuclear power plant in some embodiments of the utility model;
[0020] Figure 3 is the structural schematic diagram of the self-operated pressure regulating valve pressure stabilizing system of the nuclear power plant in some embodiments of the utility model;
[0021] Figure 4 is the structural schematic diagram of the self-operated pressure regulating valve pressure stabilizing system of the nuclear power plant in some embodiments of the utility model. DETAILED DESCRIPTION
[0022] In order to have a more clear understanding of the technical features, purposes and effects of the utility model, the specific embodiments of the utility model will be described in detail with reference to the drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or positional relationships shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the technical scheme, and cannot be understood as indicating that the devices or elements indicated must have a particular direction, therefore, it cannot be understood as a limitation on the utility model.
[0023] It should also be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing", "setting" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there can be one or more intermediate elements. The terms "first", "second", "third" and the like are only for the convenience of describing the technical scheme, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features, therefore, the features with "first", "second", "third" and the like can explicitly or implicitly include one or more of the features. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0024] In the following description, for the purposes of explanation and not limitation, specific details are set forth such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
[0025] Referring to Figure 1 The utility model discloses a kind of nuclear power plant self force type pressure regulating valve pressure stabilizing system, including first pipeline 10, the first pipeline 10 with opposite first end and second end, the first pipeline 10 is sequentially provided with first stop valve 11, first three-way valve 12, first self force type pressure regulating valve 13, second three-way valve 14 and second stop valve 15 from its first end to its second end.
[0026] The first three-way valve 12 has first valve port 121, second valve port 122 and third valve port 123, the first valve port 121 is connected with the outlet end of the first stop valve 11, the second valve port 122 is connected with the inlet end of the first self force type pressure regulating valve 13;The second three-way valve 14 has first interface 141, second interface 142 and third interface 143, the first interface 141 is connected with the outlet end of the first self force type pressure regulating valve 13, the second interface 142 is connected with the inlet end of the second stop valve 15.The first self force type pressure regulating valve 13 of first self force type pressure regulating valve pressure taking valve 131 is connected with the actuator and first pipeline 10 of itself respectively.
[0027] The nuclear power plant self force type pressure regulating valve pressure stabilizing system further includes second pipeline 20, one end of the second pipeline 20 is connected with the third valve port 123, the other end of the second pipeline 20 is connected with the third interface 143, and the second pipeline 20 is provided with second self force type pressure regulating valve 21.The second self force type pressure regulating valve 21 of second self force type pressure regulating valve pressure taking valve 211 is connected with the actuator and second pipeline 20 of itself respectively.
[0028] The first self force type pressure regulating valve 13 is a large size self force type pressure regulating valve, the pressure regulating range of the first self force type pressure regulating valve 13 is 1.1~1.5bar, and the maximum flow is 50Nm 3 / h, specifically, the pressure regulating range of the first self force type pressure regulating valve 13 is 1.1~1.5bar (abs), and the maximum flow is 50Nm 3 / h. The second self force type pressure regulating valve 21 is a small size self force type pressure regulating valve, the pressure regulating range of the second self force type pressure regulating valve 21 is 1.1~1.5bar (abs), and the maximum flow is 20Nm 3 / h.
[0029] The nuclear power plant self-operated pressure regulating valve pressure stabilizing system includes a first pipeline 10 and a second pipeline 20. The first self-operated pressure regulating valve 13 or the second self-operated pressure regulating valve 21 can be selected for pressure regulation by switching the first pipeline 10 and the second pipeline 20 as needed. The flow application range can be widened. For example, during the daily period, the second pipeline 20 can be closed by the first three-way valve 12 and the second three-way valve 14, the first pipeline 10 normally operates, and can cope with possible large flow conditions. During the overhaul period, the first pipeline 10 is closed by the first three-way valve 12 and the second three-way valve 14, the first pipeline 10 normally operates, which can meet the gas demand of the overhaul and avoid damage to the sealing surface caused by frequent opening and closing of the valve core, and can improve the stability of the equipment. In addition, the first self-operated pressure regulating valve 13 and the second self-operated pressure regulating valve 21 can also be used as backup for each other. In the case of damage to one self-operated pressure regulating valve, the first three-way valve 12 and the second three-way valve 14 can be isolated for repair without affecting normal use, and the operation convenience is improved.
[0030] As shown in Figure 1 In some embodiments, the first pipeline 10 is also provided with at least one first filter 16 near the first end thereof. The first filter 16 can be arranged between the first stop valve 11 and the first three-way valve 12, or the first filter 16 can be arranged upstream of the first stop valve 11, and the position thereof can be appropriately adjusted according to actual needs, which is not specifically limited here.
[0031] As shown in Figure 1 In some embodiments, the first pipeline 10 is provided with a first pressure gauge 17 near the first end thereof, and the first pipeline 10 is provided with a second pressure gauge 18 near the second end thereof.
[0032] The first pressure gauge 17 can be arranged between the first stop valve 11 and the first filter 16, or the first pressure gauge 17 can be arranged between the first stop valve 11 and the first three-way valve 12, which is used for monitoring the upstream pressure of the first self-operated pressure regulating valve 13 and the second self-operated pressure regulating valve 21. The number and position of the first pressure gauge 17 can be selected according to actual needs, which is not specifically limited here. Preferably, the range of the first pressure gauge 17 is 0-14 bar. Specifically, the range of the first pressure gauge 17 is 0-14 bar (abs).
[0033] The second pressure gauge 18 can be arranged between the second three-way valve 14 and the second stop valve 15, or the second pressure gauge 18 can be arranged downstream of the second stop valve 15 for monitoring the downstream pressure of the first self-operated pressure regulating valve 13 and the second self-operated pressure regulating valve 21. The number and arrangement of the second pressure gauge 18 can be selected according to actual needs, which is not specifically limited here. Preferably, the range of the second pressure gauge 18 is 0-3 bar. Specifically, the range of the second pressure gauge 18 is 0-3 bar (abs).
[0034] As shown in Figure 2 some embodiments, at least one second filter 22 is arranged in the pipeline between the third valve port 123 and the inlet end of the second self-operated pressure regulating valve 21. The second pipeline 20 can also be provided with a flow meter and a pressure gauge upstream and downstream of the second self-operated pressure regulating valve 21, which is not specifically limited here.
[0035] As shown in Figure 3 some embodiments, the first pipeline 10 is provided with a first flow meter 19 near the first end thereof, and a second flow meter 110 near the second end thereof.
[0036] The first flow meter 19 can be arranged between the first stop valve 11 and the first filter 16, or the first flow meter 19 can be arranged between the first stop valve 11 and the first three-way valve 12, or the first flow meter 19 can be arranged upstream of the first stop valve 11. The first flow meter 19 can be used to monitor the upstream flow of the first self-operated pressure regulating valve 13 and the second self-operated pressure regulating valve 21.
[0037] The second flow meter 110 can be arranged between the second stop valve 15 and the second three-way valve 14, or the second flow meter 110 can be arranged between the second stop valve 15 and the second pressure gauge 18, or the second flow meter 110 can be arranged downstream of the second stop valve 15. The second flow meter 110 can be used to monitor the downstream flow of the first self-operated pressure regulating valve 13 and the second self-operated pressure regulating valve 21.
[0038] As shown in Figures 1 to 3 some embodiments, the first end and the second end of the first pipeline 10 are each provided with a quick connector 111 to achieve quick connection and installation.
[0039] As shown in Figure 4As shown, in some embodiments, the first pipeline 10 is provided with a connecting flange 112 at the first end and the second end, and the nuclear power plant pipeline is mostly flange, so that the first pipeline 10 is provided with a connecting flange 112 at the first end and the second end, which can improve the adaptability.
[0040] It can be understood that the above embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent of the present application; it should be pointed out that for ordinary skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and some deformations and improvements can be made, which belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.
Claims
1. A self-regulating pressure regulating valve pressure stabilizing system for a nuclear power plant, characterized by, The first pipeline (10) has opposite first and second ends, and is sequentially provided with a first stop valve (11), a first three-way valve (12), a first self-operated pressure regulating valve (13), a second three-way valve (14) and a second stop valve (15) from the first end to the second end. The first three-way valve (12) has a first valve port (121), a second valve port (122) and a third valve port (123), the first valve port (121) is connected with the outlet end of the first stop valve (11), and the second valve port (122) is connected with the inlet end of the first self-operated pressure regulating valve (13); the second three-way valve (14) has a first interface (141), a second interface (142) and a third interface (143), the first interface (141) is connected with the outlet end of the first self-operated pressure regulating valve (13), and the second interface (142) is connected with the inlet end of the second stop valve (15). The nuclear power plant self-operated pressure regulating valve pressure stabilizing system further comprises a second pipeline (20), one end of the second pipeline (20) is connected with the third valve port (123), the other end of the second pipeline (20) is connected with the third interface (143), and the second pipeline (20) is provided with a second self-operated pressure regulating valve (21).
2. The self-regulating pressure regulating valve pressure maintaining system for a nuclear power plant according to claim 1, characterized by, The first pipeline (10) is further provided with at least one first filter (16) close to the first end.
3. The self-regulating pressure regulating valve pressure maintaining system for a nuclear power plant according to claim 1, characterized by, The first pipeline (10) is provided with a first pressure gauge (17) close to the first end, and is provided with a second pressure gauge (18) close to the second end.
4. The self-regulating pressure regulating valve pressure maintaining system for a nuclear power plant according to claim 3, characterized by, The range of the first pressure gauge (17) is 0-14 bar, and the range of the second pressure gauge (18) is 0-3 bar.
5. The self-regulating pressure regulating valve pressure maintaining system for a nuclear power plant according to claim 1, characterized by, The first self-operated pressure regulating valve (13) has a pressure regulating range of 1.1-1.5 bar and a maximum flow of 50 Nm 3 / h.
6. The self-regulating pressure regulating valve pressure maintenance system for a nuclear power plant of claim 1, wherein, The pressure regulating range of the second self-operated pressure regulating valve (21) 1.1 - 1.5 bar, max flow 20 Nm 3 / h.
7. The self-regulating pressure regulating valve pressure maintenance system for a nuclear power plant of claim 1, wherein, The pipeline between the third valve port (123) and the inlet end of the second self-operated pressure regulating valve (21) of the second pipeline (20) is provided with at least one second filter (22).
8. The self-regulating pressure regulating valve pressure maintaining system for a nuclear power plant according to claim 1, characterized by, The first pipeline (10) is provided with a first flowmeter (19) close to the first end, and is provided with a second flowmeter (110) close to the second end.
9. The nuclear power plant self-regulating pressure regulating valve pressure maintaining system according to claim 1, characterized by, The first end and the second end of the first pipeline (10) are both provided with a quick interface (111).
10. The self-regulating pressure regulating valve pressure maintenance system for a nuclear power plant of claim 1, wherein, The first end and the second end of the first pipeline (10) are both provided with a connecting flange (112).