Water supply system valve inner leakage drainage isolation structure
By designing an isolation structure for internal leakage drainage of valves in the water supply system, the drainage drainage takes away high-temperature steam, the problem of internal leakage of valves is solved, and the isolation effect is achieved without shutdown is achieved, which reduces the maintenance cost.
Patent Information
- Application Number
- CN202421950087.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-08-13
AI Technical Summary
In high-temperature and high-pressure environments such as thermal power stations, the valve sealing surface is prone to wear or damage, resulting in internal leakage. Traditional maintenance methods require the system to be stopped, which is expensive and has a long maintenance cycle.
A water supply system valve internal leakage drainage isolation structure is designed, including water supply pipes, check valves, control valves, first drainage ports and water inlet ports. High-temperature steam is taken away through drainage drainage, and internal leakage influence is isolated and the system is prevented from being shut down.
It realizes treatment without shutdown, respond quickly and effectively isolate internal leakage effects, reducing maintenance costs and reducing the impact of equipment maintenance on production.
Smart Images
Figure CN222798705U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boiler water supply systems, in particular to an internal leakage drainage isolation structure of a water supply system valve. Background Art
[0002] In the modern industrial system, especially in the core links of energy production such as thermal power plants, the sealing performance of valves is a key factor in ensuring the safe and stable operation of the system. Due to long-term operation under high temperature and high pressure environment, the valve sealing surface is prone to wear or damage, resulting in loose sealing, that is, "internal leakage". When the valve has internal leakage, the system behind the valve cannot be repaired due to the high temperature medium. When using traditional maintenance methods, it must face the need for planned system shutdown, high replacement costs, and long maintenance cycles.
[0003] Therefore, the utility model provides a processing technology that does not require shutdown, responds quickly and can effectively isolate the influence of internal leakage, creating conditions for ensuring subsequent equipment maintenance. Utility Model Content
[0004] The purpose of the utility model is to solve the above problems and provide a processing technology that does not require shutdown, responds quickly and can effectively isolate the influence of internal leakage, and creates conditions for subsequent equipment maintenance to create a water supply system valve internal leakage drainage isolation structure.
[0005] To achieve the above purpose, the technical solution of the utility model is: a water supply system valve internal leakage drainage isolation structure, comprising:
[0006] A water delivery pipeline, wherein check valves and control valves are arranged at intervals on the water delivery pipeline along the water delivery direction;
[0007] A first drain port is provided on the water delivery pipeline and is located on a side of the control valve close to the check valve, and a first drain valve is provided on the first drain port;
[0008] The water inlet is arranged between the check valve and the first drain port, and is used for communicating with the cooling water source.
[0009] Furthermore, the water supply pipeline includes an inlet section, an outlet section and a horizontally arranged middle section, the middle section is higher than the inlet section and the outlet section, the check valve is arranged on the inlet section, the control valve and the first drain port are arranged on the outlet section, and the water inlet is arranged on the middle section.
[0010] Furthermore, a second drain port is provided on the water inlet section, and a second drain valve is provided on the second drain port.
[0011] Furthermore, the water inlet section includes a vertically arranged connecting section, the upper end of the connecting section is connected to the middle section, and the check valve is arranged on the connecting section.
[0012] Furthermore, the first steam trap and the second water transfer valve are both electrically controlled valves.
[0013] Furthermore, the first drain port is also provided with a flow detection sensor and a temperature sensor.
[0014] Furthermore, the middle section is provided with a tube body, the tube body is provided with a vent valve, and the water inlet is provided on the tube body.
[0015] The utility model discloses a water supply system valve internal leakage drainage isolation structure, which has the following beneficial effects compared with the prior art: it can drain water in front of the control valve, and then take away the high-temperature steam caused by the internal leakage of the valve, so as to avoid the subsequent system being unable to be repaired due to the internal leakage of the valve, avoid system shutdown, and reduce the maintenance cost; it includes a water supply pipeline, and the water supply pipeline is provided with a check valve and a control valve at intervals along the water supply direction; a first drain port is provided on the water supply pipeline and is located on the side of the control valve close to the check valve, and a first drain valve is provided on the first drain port; a water inlet is provided between the check valve and the first drain port, and is used to be connected with a cooling water source. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 The utility model provides an overall structural diagram of the internal leakage drainage isolation structure of the water supply system valve Figure 1 .
[0017] Figure 2 The overall structure diagram of a water supply system valve internal leakage drainage isolation structure provided by the utility model Figure 2 .
[0018] Figure 3 The utility model provides a flow chart for implementing the internal leakage drainage isolation of the internal leakage drainage isolation structure of a water supply system valve.
[0019] Figure 4 This is a flowchart for the implementation of valve leakage detection and evaluation in the utility model.
[0020] In the figure: 1. water pipeline; 1-1. water inlet section; 1-11. connecting section; 1-2. water outlet section; 1-3. middle section; 10. first drain outlet; 101. first drain valve; 102. second drain valve; 11. water inlet; 12. second drain outlet; 121. vent valve; 13. pipe body; 14. second pipe; 2. check valve; 3. control valve; 4. flow detection sensor; 5. temperature sensor; 6. water pump. DETAILED DESCRIPTION
[0021] The utility model is now described in further detail in conjunction with the accompanying drawings. The accompanying drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.
[0022] Please refer to Figure 1-3 To achieve the above purpose, the technical solution of the utility model is: a water supply system valve internal leakage drainage isolation structure, comprising:
[0023] A water delivery pipeline 1, on which a check valve 2 and a control valve 3 are arranged at intervals along the water delivery direction;
[0024] A first drain port 10 is provided on the water delivery pipeline 1 and is located on a side of the control valve 3 close to the check valve 2. A first drain valve 101 is provided on the first drain port 10;
[0025] The water inlet 11 is disposed between the check valve 2 and the first drain port 10 and is used for communicating with a cooling water source.
[0026] Specifically, refer to Figure 1 , Figure 2 In a thermal power station, when the water pipeline 1 is working, a water pump 6 is provided at the water inlet end, and the other end is connected to the boiler. When water is passed into the boiler, the control valve 3 is opened, the first steam trap 101 is closed, the water inlet 11 is closed, and water is pumped into the boiler by the water pump 6. After the water supply is completed, the water pump stops working, and the check valve 2 prevents the water flow from being diverted. After long-term use, the check valve will be loosely sealed. At this time, the check valve needs to be repaired or replaced. When the check valve is repaired or replaced, the control valve 3 is closed to release the water flow in front of the control valve 3. At this time, the first steam trap can be opened for drainage. At this time, the control valve is tightly sealed. When the sealing performance is good, the high-temperature water in the boiler will not pass through the control valve. The check valve can be repaired or replaced after the water flow in front of the control valve is drained. If the control valve 3 is not sealed tightly at this time, the high-temperature water in the boiler will leak, causing the temperature of the water supply pipeline 1 in front of the control valve 3 to be high, which is not easy to construct. When it is determined that the control valve 3 is leaking, the drainage isolation structure provided in the present application can be used to drain the water in front of the control valve 3, thereby taking away the high-temperature steam leaking due to the valve leakage, thereby avoiding the subsequent system from being unable to be repaired due to the valve leakage, avoiding system shutdown, and reducing maintenance costs.
[0027] Further, refer to Figure 3 The implementation process of the drainage isolation structure provided in this application is as follows: the first step is valve leakage detection and evaluation. First, the control valve is detected and evaluated to confirm whether the control valve is leaking. If there is no leakage, the check valve can be constructed normally. If leakage occurs, proceed to the second step.
[0028] The second step is to inject low-temperature cooling water into the water pipeline 1. First, confirm the flow rate Q2 of the water leaking from the control valve, and fully open the first steam trap 101. Then connect the water inlet 11 to the low-temperature water source (not shown in the figure), and supply low-temperature water into the water pipeline 1. The low-temperature water and the high-temperature water leaking through the control valve realize convection heat exchange, and cool the water pipeline to cool and condense the high-temperature steam inside, and then proceed to step three.
[0029] Step three, flow balance control, and then the water flows out through the first steam trap 101. By controlling the flow rate Q1 of the low-temperature water supply, Q1+Q2 is made equal to Q, where Q is the flow rate of water discharged through the first steam trap 101. By introducing low-temperature water and making the flow rate Q1 of the low-temperature water and the valve leakage Q2 equal to the flow rate Q of the water discharge, the liquid level and temperature of the condensate in the water supply mother pipe are maintained within a safe and controllable range to avoid abnormal system pressure caused by leakage, and then proceed to step four.
[0030] Step 4, effect verification, maintain the supply flow rate of low-temperature water at Q1 and supply it continuously, and monitor the drain flow through the first steam trap. If the drain flow rate remains stable, it is determined that the isolation measures are effective and the valve leakage is effectively controlled. The low-temperature water is continuously supplied at a flow rate of Q1 for 24 hours, and the drain temperature through the first steam trap 101 is detected. If the drain temperature is maintained at around 35°C, it is determined that the maintenance conditions are met, and professionals are arranged to replace or repair the check valve. The present application can effectively solve the problem of micro-leakage of valves, solve the problem of subsequent system maintenance due to internal leakage of valves, and reduce the risk of accidents caused by equipment failures. Through real-time monitoring and control, the stability of the liquid level and temperature in the system is ensured. Compared with traditional valve replacement or maintenance, this method does not require system shutdown, reduces the impact of equipment maintenance on production, and reduces maintenance costs.
[0031] Further, refer to Figure 4 It should be noted that the steps of valve leakage detection and evaluation include: opening the first steam trap, monitoring the steam flow through the first steam trap, and evaluating the leakage degree of the valve. The continuous but slight increase in the steam flow indicates that there may be a sealing problem in the valve, confirming internal leakage; fully opening the steam trap in front of the electric door to ensure the smooth discharge of the leaking water in subsequent operations.
[0032] Further, as a preferred embodiment, refer to Figure 1 , Figure 2 The water delivery pipeline 1 includes an inlet section 1-1, an outlet section 1-2 and a horizontally arranged middle section 1-3, wherein the middle section is higher than the inlet section 1-1 and the outlet section 1-2, the check valve is arranged on the inlet section 1-1, the control valve and the first drain port are arranged on the outlet section 1-2, and the water inlet 11 is arranged on the middle section 1-3.
[0033] Specifically, by setting the middle section 1-3 higher than the water inlet section and the water outlet section, and setting the water inlet 11 on the middle section, in this way, when low-temperature water is supplied through the water inlet 11, since the check valve is in a closed state, the low-temperature water can flow downward into the water outlet section under the action of gravity, thereby forming convection with the high-temperature water and high-temperature steam in the water outlet section, thereby improving the heat exchange effect and ensuring that the water flow can be effectively discharged from the first drain port 10. Further, referring to Figure 2 The water outlet section includes a horizontally arranged first section connected to the boiler and a vertically arranged second section connected to the middle section. The control valve 3 and the first drain port 10 are both arranged on the first section. Through this arrangement, low-temperature water can first pass through the second section and then enter the first section, thereby more easily forming a convection effect, thereby better isolating the high-temperature water leaking through the control valve 3 and preventing the high-temperature steam from leaking to the water inlet section 1-1. When the check valve is repaired or replaced, low-temperature water is continuously supplied. At this time, the low-temperature water can effectively isolate the high-temperature water leaking through the control valve, thereby further improving safety.
[0034] Further, as a preferred embodiment, refer to Figure 1 , Figure 2 The water inlet section 1-1 is also provided with a second drain port 12, and the second drain port 12 is provided with a second drain valve 102. Specifically, when low-temperature water is introduced into the water inlet 11, the second drain valve 102 is in a closed state, and when the drain temperature passing through the first drain valve 101 is detected, if the drain temperature is maintained at about 35°C, the second drain valve 102 is opened to determine the temperature of the water flowing out through the second drain valve 102, and further determine the isolation condition of the valve, and when the temperature of the water flowing out through the second drain valve 102 is low and continuously maintains a low temperature, effective isolation is confirmed.
[0035] Further, as a specific implementation method, refer to Figure 1 , Figure 2 The water inlet section 1-1 includes a vertically arranged connecting section 1-11, the upper end of the connecting section 1-11 is connected to the middle section 1-3, and the check valve 2 is arranged on the connecting section 1-11.
[0036] Specifically, the check valve is arranged on the connecting section 1-11, which can ensure that the check valve is effectively closed under the pressure of the water flow, and when the check valve is repaired or replaced, the residual water in the connecting section can be well released, ensuring that the repair and replacement can be carried out smoothly.
[0037] Furthermore, as a preferred embodiment, the first steam trap and the second water transfer valve are both electrically controlled valves. By configuring the first steam trap and the second steam trap as electrically controlled valves, the first steam trap and the second steam trap can be electrically controlled, making the operation simpler and more convenient.
[0038] Furthermore, as a preferred embodiment, the first drain port is also provided with a flow detection sensor 4 and a temperature sensor 5 .
[0039] Specifically, refer to Figure 1 , Figure 2 A second pipe 14 is provided at the first drain port 10, and the first drain valve 101, the flow detection sensor 4 and the temperature sensor 5 are all provided on the second pipe 14. The flow detection sensor 4 and the temperature sensor 5 are provided downstream of the first drain valve 101. When the control valve 3 is drained and isolated, it is necessary to obtain the flow rate and temperature of the water flowing out of the first drain port 10. By providing the flow detection sensor and the temperature sensor 5, the flow rate and the temperature can be automatically detected, thereby improving convenience.
[0040] Furthermore, the middle section 1 - 3 is provided with a pipe body 13 , the pipe body is provided with a vent valve 121 , and the water inlet 11 is provided on the pipe body 13 .
[0041] Specifically, refer to Figure 1 , Figure 2 The middle section 1-3 is welded to set the pipe body 13, and the drain valve 121 is set on the pipe body. The drain valve is a component carried by the water supply system itself, which can release the air pressure in the pipeline when necessary to ensure safety. The present application sets the water inlet 11 on the pipe body 13 and utilizes the components of the water supply system itself, which is more convenient and simple to use. As an implementation method, the water inlet 11 can be set on the side of the pipe body 13 located near the drain valve 121 close to the water supply pipeline 1, or the inlet of the pipe body 13 can be directly used as the water inlet 11.
[0042] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.
Claims
1. A water supply system valve internal leakage drainage isolation structure, characterized in that: include: A water delivery pipeline (1), wherein check valves (2) and control valves (3) are arranged at intervals on the water delivery pipeline along the water delivery direction; A first drain port (10) is provided on the water delivery pipeline (1) and is located on a side of the control valve (3) close to the check valve (2); a first drain valve (101) is provided on the first drain port (10); The water inlet (11) is arranged between the check valve (2) and the first drain port (10) and is used for communicating with a cooling water source.
2. The water supply system valve internal leakage drainage isolation structure according to claim 1, characterized in that: The water delivery pipeline (1) comprises a water inlet section (1-1), a water outlet section (1-2) and a horizontally arranged middle section (1-3), wherein the middle section is higher than the water inlet section (1-1) and the water outlet section (1-2), the check valve is arranged on the water inlet section (1-1), the control valve and the first drain port are arranged on the water outlet section (1-2), and the water inlet (11) is arranged on the middle section (1-3).
3. A water supply system valve internal leakage drainage isolation structure according to claim 2, characterized in that: The water inlet section (1-1) is also provided with a second drain port (12), and the second drain port (12) is provided with a second drain valve (102).
4. A water supply system valve internal leakage drainage isolation structure according to claim 3, characterized in that: The water inlet section (1-1) comprises a vertically arranged connecting section (1-11), the upper end of the connecting section (1-11) is connected to the middle section (1-3), and the check valve (2) is arranged on the connecting section (1-11).
5. The water supply system valve internal leakage drainage isolation structure according to claim 2, characterized in that: The first steam trap and the second water delivery valve are both electrically controlled valves.
6. The water supply system valve internal leakage drainage isolation structure according to claim 2, characterized in that: The first drain port is also provided with a flow detection sensor (4) and a temperature sensor (5).
7. The water supply system valve internal leakage drainage isolation structure according to claim 3, characterized in that: The middle section (1-3) is provided with a pipe body (13), a drain valve (121) is provided on the pipe body, and the water inlet (11) is provided on the pipe body (13).