Non-condensable gas system drainage structure for nuclear power and non-condensable gas system
By designing isolation valves, inclined connecting pipes, and float steam trap structures in the non-condensable gas system for nuclear power plants, the problem of float steam traps being unable to automatically drain water due to installation space limitations was solved, achieving stable drainage of the medium within the system and improving system reliability and medium parameters.
Patent Information
- Application Number
- CN202520343278.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-02-28
AI Technical Summary
In nuclear power plants, float-type steam traps cannot be installed vertically due to space constraints, which prevents water from automatically draining and affects the quality of the system media.
Design a condensate drain structure for a non-condensable gas system in nuclear power plants, including an isolation valve, an inclined connecting pipe, and a float drain valve. The isolation valve is located below the condensate drain section. The connecting pipe is inclined to ensure that the float drain valve is installed at a low position. The float drain valve is installed at the lowest point of the connecting pipe and provides a bypass pipe to ensure condensate drainage in case of float drain valve failure.
It effectively avoids the problems of gas and water accumulation, improves the reliability of the system, ensures the stability of medium parameters, prevents water accumulation in the non-condensable gas system, and ensures the quality of the medium.
Smart Images
Figure CN223579660U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to nuclear power equipment technical field, especially nuclear power is with non condensation gas system drainage structure and non condensation gas system. BACKGROUND
[0002] Ball float trap is widely used in nuclear power plant and industrial field, is used to eliminate the condensate water produced in pipeline on non condensation gas system such as compressed air, improves medium parameter, and its working principle is that when water enters ball float trap cavity, the ball float in valve cavity rises with water level, and the ball float trap opens, and the accumulated water in pipeline is discharged, and when the accumulated water is discharged, the liquid level drops, and the ball float drops, and the valve is closed.
[0003] Ball float trap is generally installed at the lowest point of equipment and pipeline, and the stored water in the system flows to the ball float trap by gravity, so that the purpose of discharging accumulated water is realized, and sometimes due to the arrangement space problem, the space at the lowest point is small, the ball float trap cannot be installed on the vertical pipeline, and can only be installed on the horizontal pipeline, due to the equipment selection and on-site installation problem, the accumulated gas in the ball float trap cavity cannot be discharged, and then the accumulated water produced in the system cannot flow into the ball float trap cavity, the valve cannot be opened, and the accumulated water in the system cannot realize the automatic drainage function through the ball float trap, so that the medium quality in the system is reduced, and the accumulated water problem in the system is caused. UTILITY MODEL CONTENTS
[0004] The first purpose of the utility model is to provide a nuclear power non condensation gas system drainage structure, so that the accumulated water in the system cannot realize the automatic drainage function through the ball float trap, the medium quality in the system is ensured, and the accumulated water in the non condensation gas system is prevented.
[0005] The second purpose of the utility model is to provide a nuclear power non condensation gas system based on the above nuclear power non condensation gas system drainage structure.
[0006] In order to realize the above purpose, the utility model provides the following technical scheme:
[0007] A nuclear power non condensation gas system drainage structure, comprising:
[0008] An isolation valve is arranged below the drainage section pipeline of the non condensation gas system, and the inlet of the isolation valve is communicated with the drainage section pipeline of the non condensation gas system;
[0009] A connecting pipeline is connected to the outlet of the isolation valve, and the connecting pipeline is inclined arranged, so that the horizontal position of the upstream end of the connecting pipeline is higher than that of the downstream end of the connecting pipeline;
[0010] A float trap is arranged in the connecting pipeline.
[0011] In one embodiment of the present application, the axis of the inlet flow passage and the axis of the outlet flow passage of the isolation valve are kept in the same horizontal plane.
[0012] In one embodiment of the present application, the isolation valve is a lower-inlet upper-outlet isolation valve, and the isolation valve is horizontally installed so that the movement direction of the valve core of the isolation valve is horizontal and the axis of the inlet flow passage and the axis of the outlet flow passage of the isolation valve are kept in the same horizontal plane.
[0013] In one embodiment of the present application, a bypass pipeline is further arranged in parallel with the connecting pipeline at the outlet of the isolation valve, and a switch valve is arranged in the bypass pipeline.
[0014] In one embodiment of the present application, the float trap is a lever float trap.
[0015] In one embodiment of the present application, the included angle of the connecting pipeline with respect to the horizontal direction is 1°-5°.
[0016] A non-condensable gas system for nuclear power plants comprises the non-condensable gas system drain structure according to any one of the above.
[0017] It can be seen from the above technical solution that the utility model discloses a non-condensable gas system drain structure for nuclear power plants, which comprises an isolation valve, a connecting pipeline and a float trap. The isolation valve is arranged below the drain section pipeline of the non-condensable gas system, and the inlet of the isolation valve is communicated with the drain section pipeline of the non-condensable gas system. The upstream end of the connecting pipeline is connected to the outlet of the isolation valve. The connecting pipeline is arranged obliquely so that the horizontal position of the upstream end of the connecting pipeline is higher than the horizontal position of the downstream end of the connecting pipeline. The float trap is arranged in the connecting pipeline.
[0018] The above drain structure can avoid the problem that the low inlet and high outlet of the existing connecting pipeline cause the drain water to flow to the float trap, and thus the float trap cannot be opened. Through the above optimization, the problem that the float trap cannot realize automatic drain due to air blockage can be avoided, the reliability of the system can be improved, the water accumulation in the non-condensable gas system can be avoided, the medium parameters can be improved, and the accumulated water in the system can be drained. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.
[0020] Figure 1 The utility model provides a main view of nuclear power not condensation gas system drain structure for an embodiment of the utility model;
[0021] Figure 2 The utility model provides a section view of nuclear power not condensation gas system drain structure middle lower inlet upper outlet isolation valve for another embodiment of the utility model;
[0022] Figure 3 The utility model provides a main view of nuclear power not condensation gas system drain structure for another embodiment of the utility model;
[0023] Figure 4 The utility model provides a main view of nuclear power not condensation gas system drain structure for still another embodiment of the utility model;
[0024] Figure 5 The utility model provides a plan view of nuclear power not condensation gas system drain structure for still another embodiment of the utility model.
[0025] In the drawing,
[0026] 1 is isolation valve, 101 is import flow channel, 102 is export flow channel, 103 is valve core, 2 is connecting pipeline, 3 is float ball drain valve, 4 is bypass pipeline, 5 is switch valve, 6 is pressure detection device. DETAILED DESCRIPTION
[0027] One of the cores of the utility model is to provide a nuclear power not condensation gas system drain structure, and the structural design of the nuclear power not condensation gas system drain structure can avoid that the accumulated water in the system cannot realize automatic drain function through the drain valve, guarantees the medium quality in the system, and prevents the accumulated water in the nuclear power not condensation gas system.
[0028] Another core of the utility model is to provide a nuclear power not condensation gas system based on the above nuclear power not condensation gas system drain structure.
[0029] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.
[0030] Please refer to Figure 1 , Figure 1 The utility model provides a main view of nuclear power not condensation gas system drain structure for an embodiment of the utility model.
[0031] The utility model discloses a nuclear power use non condensation gas system drainage structure, this nuclear power use non condensation gas system drainage structure includes isolation valve 1, connecting pipeline 2 and float ball trap 3.
[0032] Wherein, isolation valve 1 is arranged below the drainage section pipeline of non condensation gas system, and the inlet of isolation valve 1 is communicated with the drainage section pipeline of non condensation gas system.
[0033] When installing float ball trap 3, if float ball trap 3 is installed at the high position of connecting pipeline 2, or connecting pipeline 2 is inclined upward from the end connected with upstream isolation valve 1, and float ball trap 3 is installed at connecting pipeline 2, i.e. the position of float ball trap 3 is higher than the position of upstream isolation valve 1, it is easy to cause the gas accumulation in the valve cavity of float ball trap 3, so that the drainage cannot enter the valve cavity of float ball trap 3, and the float ball of float ball trap 3 cannot float up, and float ball trap 3 is always in the closed state.
[0034] To avoid the above problems, in the embodiment of the present application, the upstream end of connecting pipeline 2 is connected to the outlet of isolation valve 1, and connecting pipeline 2 is inclined, so that the horizontal position of the upstream end of connecting pipeline 2 is higher than the horizontal position of the downstream end of connecting pipeline 2, the slope of connecting pipeline 2 for installing float ball trap 3 is determined according to the space size of the installation position of float ball trap 3 during installation, and then float ball trap 3 is installed at connecting pipeline 2. By making the connecting pipeline 2 with float ball trap 3 installed have a slope, when installing float ball trap 3, it is only necessary to ensure that the horizontal position of float ball trap 3 is lower than the horizontal position of upstream isolation valve 1, and float ball trap 3 is preferably installed at the lowest point of connecting pipeline 2, so that the gas accumulation in the valve cavity of float ball trap 3 can be avoided, and the non condensation gas in the valve cavity of float ball trap 3 can flow back into the system through connecting pipeline 2.
[0035] Compared with the prior art, the nuclear power use non condensation gas system drainage structure provided by the embodiment of the utility model can avoid the gas accumulation in the valve cavity of float ball trap 3, so that the drainage cannot flow to float ball trap 3, and further cause the problem that float ball trap 3 cannot be opened, through the above optimization, the problem that float ball trap 3 cannot realize automatic drainage due to air resistance can be avoided, which is helpful to improve the reliability of the system, avoid the water accumulation in the non condensation gas system, improve the medium parameters, and drain the accumulated water in the system
[0036] To avoid the inlet of the isolation valve 1 being flooded by the condensed water, causing the non-condensed gas downstream of the isolation valve 1 to be blocked and unable to be discharged, in an embodiment of the present application, the axis of the inlet flow passage of the isolation valve 1 and the axis of the outlet flow passage of the isolation valve 1 are kept on the same horizontal plane. Through this arrangement of the isolation valve 1, the problem that the inlet of the isolation valve 1 is flooded by the condensed water upstream of the isolation valve 1, causing the non-condensed gas downstream of the isolation valve 1 to be blocked and unable to be discharged, which is caused by the conventional isolation valve 1 being arranged in a lower inlet and upper outlet structure, can be avoided.
[0037] It should be noted that, as shown in Figure 2 , the commonly used isolation valve 1 is generally a lower inlet and upper outlet isolation valve 1, so at the normal installation position of the isolation valve 1, the inlet flow passage 101 and the outlet flow passage 102 of the isolation valve 1 are arranged in a staggered and parallel manner, that is, if the inlet end of the inlet flow passage 101 and the outlet end of the outlet flow passage 102 are on the same horizontal plane, the inlet flow passage 101 and the outlet flow passage 102 are both inclined downward from the respective inlet end, the outlet end of the inlet flow passage 101 is lower than the inlet end of the outlet flow passage 102, and at this time the movement direction of the valve core 103 of the isolation valve 1 is up and down, if the inlet end of the inlet flow passage 101 and the outlet end of the outlet flow passage 102 are not on the same horizontal plane, the outlet flow passage 102 is higher than the inlet flow passage 101 as a whole, so the medium generally passes through the isolation valve 1 in a lower inlet and upper outlet form, when the water in the float drain valve 3 is discharged, the connecting pipeline 2 is filled with non-condensed gas, when condensed water is generated upstream of the isolation valve 1, the condensed water will flood the inlet of the isolation valve 1, the non-condensed gas downstream of the isolation valve 1 is blocked and unable to be discharged, and the float drain valve 3 cannot be opened, therefore when the isolation valve 1 is a lower inlet and upper outlet isolation valve 1, the lower inlet and upper outlet isolation valve 1 is installed between the drain section pipeline of the non-condensed gas system and the connecting pipeline 2 by rotating 90° around the inlet and outlet axes of the isolation valve 1 from the normal installation position, as shown in Figure 4 and Figure 5 , that is, the isolation valve 1 is installed horizontally, through this installation manner, the movement direction of the valve core of the isolation valve 1 is horizontal, and the lower inlet and upper outlet isolation valve 1 can be changed into the isolation valve 1 with the inlet flow passage and the outlet flow passage kept on the same horizontal plane.
[0038] Of course, it should be noted that not all isolation valves 1 are in the lower inlet and upper outlet form, if the isolation valve 1 is not in the lower inlet and upper outlet form, it can be installed in the installation manner as shown in Figure 1 .
[0039] It can be predicted that the float drain valve 3 may fail after a period of operation, in order to enable the drain to be discharged in time when the float drain valve 3 fails, in an embodiment of the present application, as shown in Figure 3As shown, the nuclear power non-condensable gas system drainage structure further comprises a bypass pipeline 4, the bypass pipeline 4 is connected with the connecting pipeline 2 in parallel with the outlet of the isolation valve 1, and the bypass pipeline 4 is provided with an on-off valve 5, so that when the floating ball drainage valve 3 fails, the on-off valve 5 can be opened, and the bypass pipeline 4 is used to drain the drainage, so as to quickly drain the drainage when the floating ball drainage valve 3 fails, and the reliability of the drainage structure is increased.
[0040] In an embodiment of the present application, the included angle a of the connecting pipeline 2 relative to the horizontal direction is 1°-5°. It should be noted that this is only a preferred scheme provided by the embodiment of the present application, and in actual application, the included angle of the connecting pipeline 2 relative to the horizontal direction can be adjusted according to the space condition, which is not limited herein.
[0041] The embodiment of the present application further provides a nuclear power non-condensable gas system, which comprises the nuclear power non-condensable gas system drainage structure as described in the above embodiment, and since the nuclear power non-condensable gas system adopts the nuclear power non-condensable gas system drainage structure in the above embodiment, the technical effects of the nuclear power non-condensable gas system are referred to the above embodiment.
[0042] It should be noted that each embodiment in the present specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts between each embodiment can be referred to each other.
[0043] The principle and implementation mode of the present application are described by applying specific examples, and the above embodiment is only used to help understand the core idea of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.
Claims
1. A hydrophobic structure for a non-condensable gas system in nuclear power plants, characterized in that, include: Isolation valve (1), the isolation valve (1) is located below the condensate section of the non-condensable gas system, and the inlet of the isolation valve (1) is connected to the condensate section of the non-condensable gas system. A connecting pipe (2) is provided, the upstream end of which is connected to the outlet of the isolation valve (1). The connecting pipe is inclined so that the horizontal position of the upstream end of the connecting pipe (2) is higher than the horizontal position of the downstream end of the connecting pipe (2). A float drain valve (3) is provided in the connecting pipe (2).
2. The hydrophobic structure for a non-condensable gas system in nuclear power plants according to claim 1, characterized in that, The axis of the inlet flow channel and the axis of the outlet flow channel of the isolation valve (1) are kept on the same horizontal plane.
3. The hydrophobic structure for a non-condensable gas system in nuclear power plants according to claim 2, characterized in that, The isolation valve (1) is a bottom-inlet, top-outlet isolation valve. The isolation valve (1) is installed horizontally so that the valve core of the isolation valve (1) moves in a horizontal direction and the axis of the inlet flow channel and the axis of the outlet flow channel of the isolation valve (1) are kept on the same horizontal plane.
4. The hydrophobic structure for a non-condensable gas system in nuclear power plants according to any one of claims 1-3, characterized in that, It also includes a bypass pipeline (4), which is connected in parallel with the connecting pipeline (2) to the outlet of the isolation valve (1), and a switch valve (5) is provided on the bypass pipeline (4).
5. The hydrophobic structure for a non-condensable gas system in nuclear power plants according to any one of claims 1-3, characterized in that, The float drain valve (3) is a lever float drain valve.
6. The hydrophobic structure for a non-condensable gas system in nuclear power plants according to any one of claims 1-3, characterized in that, The angle between the connecting pipe (2) and the horizontal direction is 1°~5°.
7. A non-condensable gas system for nuclear power plants, characterized in that, Includes the hydrophobic structure for a non-condensable gas system for nuclear power as described in any one of claims 1-6.