Novel exhaust system for steam-driven pump of nuclear power unit
By designing a new exhaust system of a steam pump including exhaust devices, switch valves, exhaust valves and bubble detection modules in nuclear power cooling equipment, the problem of gas accumulation cannot be discharged when the gas inlet pipeline of the steam pump is injected. Fully filling and exhaust gas of the inlet pipe section of the steam pump is achieved, reducing tripping.
Patent Information
- Application Number
- CN202420875890.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-04-24
AI Technical Summary
During the overhaul of the nuclear power cooling equipment, when the inlet pipeline of the steam pump is intake, the gas accumulated in the pipeline cannot be discharged due to the overhaul of the overhaul of the nuclear power cooling equipment, the gas accumulated in the pipeline cannot be discharged, causing the steam pump to trip, and there is a lack of sufficient water filling of the inlet pipeline section of the steam pump Exhaust equipment or device.
A new exhaust system for the steam pump of a nuclear power unit was designed, including exhaust devices, switch valves, exhaust valves and bubble detection modules. The exhaust device is arranged on the cooling water pipe between the steam pump and the reservoir. The bubbles in the pipe are detected through the bubble detection module, and the exhaust device and exhaust valve are used to fill and exhaust.
It realizes sufficient water and exhaust in the inlet pipe section of the steam pump, avoids accumulation of gas entering the steam pump, reduces the occurrence of steam pump tripping, and provides a normal, non-emergency exhaust solution.
Smart Images
Figure CN222457739U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of nuclear power cooling, in particular to a new type of exhaust system of a steam-driven pump of a nuclear power unit. Background Art
[0002] During the overhaul of nuclear power cooling equipment, the cooling water pipeline needs to be completely emptied, and then maintenance work is carried out, which will cause air to enter the inlet pipeline of the pneumatic pump. However, the highest point of the inverted U-shaped pipeline at the inlet of the pneumatic pump currently arranged and some air-holding places are not equipped with exhaust pipes. The accumulated gas in the pipeline cannot be discharged when filling and exhausting water, resulting in the accumulated gas entering the pneumatic pump when the pneumatic pump is started, causing the pneumatic pump to trip. After the pneumatic pump trips, a large amount of gas will accumulate in the pneumatic pump, and the only way to use the pneumatic pump is to flush the pneumatic pump with a large flow of water to exhaust the gas. However, this is only an emergency measure, which takes a lot of time and cannot be used as a normal solution. At present, there is still a lack of equipment or devices that can fully fill and exhaust the inlet pipe section of the pneumatic pump. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a novel exhaust system for a pneumatic pump of a nuclear power unit, aiming to solve the problem in the prior art that the pump inlet pipe section cannot be fully filled with water for exhaust.
[0004] The utility model solves the technical problem by adopting a technical solution, comprising: an exhaust system for exhausting air from a cooling water system, the cooling water system comprising a cooling water pipeline, a liquid reservoir and a pneumatic pump; an exhaust device, a switch valve, an exhaust valve and a bubble detection module; the exhaust device is arranged on the cooling water pipeline between the pneumatic pump and the liquid reservoir, the exhaust valve is arranged on the cooling water pipeline between the exhaust device and the pneumatic pump, the switch valve is arranged on the cooling water pipeline between the exhaust device and the liquid reservoir, the bubble detection module is arranged on the cooling water pipeline, and the bubble detection module is used to detect bubbles in the cooling water pipeline; wherein, when the exhaust device is connected to the cooling water pipeline, the cooling water pipeline between the exhaust valve and the exhaust device is in a disconnected state, and the cooling water pipeline between the pneumatic pump and the liquid reservoir is in a connected state; when the exhaust device is disconnected from the cooling water pipeline, the cooling water pipeline between the pneumatic pump and the liquid reservoir is in a connected state.
[0005] In one embodiment, the exhaust device includes a double-flange pipe, a transition flange and a discharge pipe, the double-flange pipe is connected to the cooling water pipe, the transition flange is connected to the double-flange pipe, and the discharge pipe is connected to the transition flange.
[0006] In one embodiment, the double-flange pipe is a bent pipe structure, one end of the double-flange pipe is connected to the cooling water pipe, and the other end of the double-flange pipe forms an angle with the cooling water pipe.
[0007] In one embodiment, the exhaust device is further provided with a double-flange reducing pipe, the two ends of the double-flange reducing pipe have different diameters, and the double-flange reducing pipe is connected between the double-flange pipe and the adapter flange.
[0008] In one embodiment, the connection between the double flange pipeline, the adapter flange and the double flange reducing pipeline is sealed by flange gaskets and bolt connections.
[0009] In one embodiment, the bubble detection module is composed of a plurality of bubble detection sensors, and the bubble detection sensors are arranged at the air-blocking locations of the entire cooling water pipeline.
[0010] In one embodiment, the bubble detection sensor is an ultrasonic sensor.
[0011] In one embodiment, the bubble detection sensor is also arranged on the cooling water pipeline at the exhaust valve.
[0012] In one embodiment, the switch valve is a gate valve.
[0013] In one embodiment, the exhaust valve is a sewage compound exhaust valve.
[0014] The implementation of the utility model has the following beneficial effects: bubbles are detected in the cooling water pipeline by arranging a bubble detection module on the cooling water pipeline, an exhaust device is installed on the cooling water pipeline between the pneumatic pump and the liquid reservoir, the cooling water pipeline connecting the pneumatic pump to the liquid reservoir is disconnected, at this time the exhaust device is connected to the liquid reservoir through the cooling water pipeline, the user injects the cooling water in the liquid reservoir into the cooling water pipeline through the switch valve, the air and water in the cooling water pipeline will be completely discharged from the exhaust device, the user then closes the switch valve, removes the exhaust device, reconnects the liquid reservoir to the pneumatic pump with the cooling water pipeline, starts the switch valve, and then opens the exhaust valve to exhaust the remaining air inside, completing the full filling and exhaust of the inlet pipe section of the pneumatic pump. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:
[0016] Figure 1 It is a water circuit diagram after exhaust installation of a new type of exhaust system of a steam-driven pump of a nuclear power unit in one embodiment of the utility model;
[0017] Figure 2 It is a water circuit diagram after exhaust installation of a new type of exhaust system of a steam-driven pump of a nuclear power unit in one embodiment of the utility model;
[0018] Figure 3 It is a cross-sectional view of a pneumatic pump of a new type of pneumatic pump exhaust system for a nuclear power unit in one embodiment of the utility model;
[0019] Figure 4 It is a structural diagram of an exhaust device of a new type of exhaust system of a steam-driven pump of a nuclear power unit in one embodiment of the utility model.
[0020] Figure Annotation
[0021] 100. Liquid storage tank; 110. Pneumatic pump; 111. Water inlet; 120. Cooling water pipe; 200. Exhaust device; 201. Double flange pipe; 202. Double flange reducing pipe; 203. Adapter flange; 204. Discharge pipe; 205. Bolts; 210. Switch valve; 220. Exhaust valve; 230. Bubble detection module. DETAILED DESCRIPTION
[0022] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.
[0023] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.
[0024] Figures 1 to 3The utility model shows a novel exhaust system of a pneumatic pump of a nuclear power unit in one embodiment of the utility model, which can be used to fully fill the inlet pipe section of the pneumatic pump 110 with water and exhaust the air, and can include an exhaust system for exhausting air in a cooling water system, the cooling water system includes a cooling water pipeline 120, a liquid reservoir 100 and the pneumatic pump 110; an exhaust device 200, a switch valve 210, an exhaust valve 220 and a bubble detection module 230; the exhaust device 200 is arranged on the cooling water pipeline 120 between the pneumatic pump 110 and the liquid reservoir 100, and the exhaust valve 220 is arranged on the cooling water pipeline 120 between the exhaust device 200 and the pneumatic pump 110. 0, the switch valve 210 is arranged on the cooling water pipe 120 between the exhaust device 200 and the liquid reservoir 100, and the bubble detection module 230 is arranged on the cooling water pipe 120, and the bubble detection module 230 is used to detect bubbles in the cooling water pipe 120; wherein, when the exhaust device 200 is connected to the cooling water pipe 120, the cooling water pipe 120 between the exhaust valve 220 and the exhaust device 200 is in a disconnected state, and the pneumatic pump 110 and the cooling water pipe 120 of the liquid reservoir 100 are in a connected state; when the exhaust device 200 is disconnected from the cooling water pipe 120, the cooling water pipe 120 between the pneumatic pump 110 and the liquid reservoir 100 is in a connected state. By setting a bubble detection module 230 on the cooling water pipe 120, it is detected that there are bubbles in the cooling water pipe 120, and an exhaust device 200 is installed on the cooling water pipe 120 between the pneumatic pump 110 and the liquid reservoir 100. The water inlet 111 of the pneumatic pump 110 is disconnected from the cooling water pipe 120 of the liquid reservoir 100. At this time, the exhaust device 200 is connected to the liquid reservoir 100 through the cooling water pipe 120. The user injects the cooling water in the liquid reservoir 100 into the cooling water pipe 120 through the switch valve 210, and the air and water in the cooling water pipe 120 will be completely discharged from the exhaust device 200. The user then closes the switch valve 210, removes the exhaust device 200, reconnects the water inlet 111 of the liquid reservoir 100 with the cooling water pipe 120, starts the switch valve 210, and then opens the exhaust valve 220 to exhaust the remaining air inside, completing the full filling and exhaust of the inlet pipe section of the pneumatic pump 110.
[0025] It can be understood that the exhaust device 200 has the same pipe diameter as the cooling water pipe 120 at the connection point, and the gas and liquid can be discharged directly in a channel greater than or equal to the diameter. The exhaust valve 220 is too small relative to the pipe diameter of the cooling water pipe 120. When filling with water, only a small part of the air can be discharged, and the air in the breath-holding area will still not be discharged. Therefore, it is difficult to achieve complete gas discharge using only the exhaust valve 220.
[0026] It is understandable that when the exhaust device 200 is disassembled, air will remain in the cooling water pipe 120 at the disassembly location, and the exhaust valve 220 is required to discharge the air.
[0027] In one embodiment, the exhaust device 200 may include: the double flange pipe 201, the adapter flange 203 and the double flange reducing pipe 202 are connected and sealed by flange gaskets and bolts 205, the flange gasket plays a sealing role, and the bolts 205 play a fastening role.
[0028] In one embodiment, the bubble detection module 230 may include: the bubble detection module 230 is composed of a plurality of bubble detection sensors, and the bubble detection sensors are arranged at the air-holding points of the entire cooling water pipeline 120. It can be understood that the air-holding points are generally the highest points and corners of the pipeline.
[0029] In one embodiment, the bubble detection module 230 may include that the bubble detection sensor is an ultrasonic sensor. The ultrasonic sensor does not need to be arranged in the cooling water pipe 120, but can be directly fixed outside the pipe, thereby improving installation efficiency.
[0030] In one embodiment, the bubble detection sensor may include: the bubble detection sensor is also arranged on the cooling water pipe 120 at the exhaust valve 220. After the exhaust device 200 is disassembled and assembled, a large number of bubbles exist near the exhaust device 200, and the exhaust valve 220 can discharge the bubbles.
[0031] In one embodiment, the switch valve 210 may include a gate valve.
[0032] In one embodiment, the exhaust valve 220 may be a sewage compound exhaust valve 220. The compound exhaust valve 220 is used to remove a large amount of air gathered in the pipe, and once negative pressure is generated in the pipe, the valve quickly inhales outside air to protect the pipeline from damage caused by negative pressure.
[0033] See also Figure 4 As shown, in one embodiment, the exhaust device 200 may include a double flange pipe 201, an adapter flange 203 and a discharge pipe 204, wherein the double flange pipe 201 is connected to the cooling water pipe 120, the adapter flange 203 is connected to the double flange pipe 201, and the discharge pipe 204 is connected to the adapter flange 203. It can be understood that the large-diameter cooling water pipe 120 has a higher efficiency of flange connection and disassembly. Because the discharge pipe 204 is a hose, the adapter flange 203 is required to connect it to the double flange pipe 201.
[0034] In one embodiment, the double flange pipe 201 may include a bent pipe structure, one end of the double flange pipe 201 is connected to the cooling water pipe 120, and the other end of the double flange pipe 201 forms an angle with the cooling water pipe 120. The bent pipe structure can avoid the original cooling water pipe 120 and prevent the discharge pipe 204 from interfering with the original cooling water pipe 120.
[0035] In a specific embodiment, the double flange pipe 201 has a bend angle of 90 degrees.
[0036] In one embodiment, the exhaust device 200 also includes a double-flange reducer 202, the two ends of the double-flange reducer 202 have different diameters, and the double-flange reducer 202 is connected between the double-flange pipe 201 and the adapter flange 203. Because the diameters of the cooling water pipe 120 are different, the required diameters of the double-flange pipe 201 are also different, and a special double-flange reducer 202 is required for docking.
[0037] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.
Claims
1. A new type of exhaust system for a pneumatic pump of a nuclear power unit, the exhaust system is used to exhaust the air in the cooling water system, the cooling water system includes a cooling water pipeline, a liquid reservoir and a pneumatic pump; characterized in that: include: Exhaust device, switch valve, exhaust valve and bubble detection module; The exhaust device is arranged on the cooling water pipeline between the pneumatic pump and the liquid reservoir, the exhaust valve is arranged on the cooling water pipeline between the exhaust device and the pneumatic pump, the switch valve is arranged on the cooling water pipeline between the exhaust device and the liquid reservoir, and the bubble detection module is arranged on the cooling water pipeline, and the bubble detection module is used to detect bubbles in the cooling water pipeline; Wherein, when the exhaust device is connected to the cooling water pipeline, the cooling water pipeline between the exhaust valve and the exhaust device is in a disconnected state, and the pneumatic pump and the cooling water pipeline of the liquid reservoir are in a connected state; When the exhaust device is disconnected from the cooling water pipeline, the cooling water pipeline between the pneumatic pump and the liquid reservoir is in a connected state.
2. A novel exhaust system for a pneumatic pump of a nuclear power unit according to claim 1, characterized in that: The exhaust device comprises a double-flange pipeline, a transfer flange and a discharge pipe, the double-flange pipeline is connected to the cooling water pipeline, the transfer flange is connected to the double-flange pipeline, and the discharge pipe is connected to the transfer flange.
3. A novel exhaust system for a pneumatic pump of a nuclear power unit according to claim 2, characterized in that: The double-flange pipe is a bent pipe structure, one end of the double-flange pipe is connected to the cooling water pipe, and the other end of the double-flange pipe forms an angle with the cooling water pipe.
4. A novel exhaust system for a pneumatic pump of a nuclear power unit according to claim 2, characterized in that: The exhaust device is also provided with a double-flange reducing pipe, the two ends of the double-flange reducing pipe have different diameters, and the double-flange reducing pipe is connected between the double-flange pipe and the adapter flange.
5. A novel exhaust system for a pneumatic pump of a nuclear power unit according to claim 4, characterized in that: The double flange pipeline, the adapter flange and the double flange reducing pipeline are connected and sealed by flange gaskets and bolts.
6. A novel exhaust system for a pneumatic pump of a nuclear power unit according to claim 1, characterized in that: The bubble detection module is composed of a plurality of bubble detection sensors, and the bubble detection sensors are arranged at the air-blocking position of the entire cooling water pipeline.
7. A novel exhaust system for a pneumatic pump of a nuclear power unit according to claim 6, characterized in that: The bubble detection sensor is an ultrasonic sensor.
8. A novel exhaust system for a pneumatic pump of a nuclear power unit according to claim 6, characterized in that: The bubble detection sensor is also arranged on the cooling water pipeline at the exhaust valve.
9. A novel exhaust system for a pneumatic pump of a nuclear power unit according to claim 1, characterized in that: The switch valve is a gate valve.
10. A novel exhaust system for a pneumatic pump of a nuclear power unit according to claim 1, characterized in that: The exhaust valve is a sewage composite exhaust valve.