A leak-proof control device for a deluge valve of a hydro-generator
By designing a three-way structure for the main water supply pipe, drainage branch pipe, and auxiliary water supply pipe, and using PLC programming control, the leakage and response delay problems of the deluge valve of the hydro-generator were solved, achieving a smooth transition and rapid leakage discharge of fire water supply, and improving the reliability and response speed of the fire protection system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 大唐观音岩水电开发有限公司
- Filing Date
- 2025-08-18
- Publication Date
- 2026-07-31
AI Technical Summary
The existing control methods for deluge valves of hydro-generators suffer from delayed response during manual operation, insufficient leakage monitoring, and a lack of redundancy in pipeline design. This can cause fire-fighting water systems to miss the best time to extinguish fires or cause equipment damage.
It adopts a three-way structure design with main water supply pipe, drainage branch pipe and auxiliary water supply pipe, combined with PLC programming control of electric valve interlock and delay module to realize reverse linkage control of electrical interlock and software logic interlock. It is equipped with leakage detection sensor and RS485 communication interface to ensure smooth transition of fire water supply and rapid discharge of leakage.
It effectively reduces the risk of pipeline leakage, ensures a smooth transition of fire water supply, reduces leakage risk, and improves the response speed and reliability of the fire protection system.
Smart Images
Figure CN224581822U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire control equipment technology, specifically to a leak prevention control device for a deluge valve of a hydro generator. Background Technology
[0002] The deluge valve for a hydro-generator is a key component for automatically activating water spray to extinguish fires when the hydro-generator catches fire, and its reliability directly affects equipment safety. Currently, fire-fighting water systems typically employ a single deluge valve with manual control. This means that during normal operation, the deluge valve is switched to manual mode and the upstream manual fire-fighting water valve is closed to prevent accidental activation or internal leakage. However, this approach has the following drawbacks:
[0003] First, manual operation results in a delayed response, requiring manual valve opening during a fire, which may cause the best opportunity to extinguish the fire to be missed; second, the system cannot be monitored for leaks in real time, and if the deluge valve leaks, fire water will be sprayed directly onto the generator coil, causing insulation degradation and equipment damage.
[0004] Secondly, in fire water supply pipelines, the water pressure in the pipeline may become abnormal for other reasons. Since common deluge valves are single-pipe structures directly connected to the fire water supply pipeline, there is no redundancy design in the pipeline. As a result, after the pipeline is subjected to several abnormal pressures, the control valve in the pipeline becomes loose, which leads to water leakage. This can further damage the control valve in the pipeline. Therefore, such pipelines often lack a pressure relief mechanism to release abnormal water pressure.
[0005] Similar patents (such as CN109058656A) use single-pipe electric valve control, do not form a physically isolated dual-channel structure, and lack a pressure transition scheme based on time-sequence control, so there is still a risk of leakage in non-fire-fighting conditions. Utility Model Content
[0006] To address the aforementioned technical problems, this utility model proposes the following technical solution:
[0007] A leak-proof control device for a deluge valve of a hydro-generator is characterized by comprising a main water supply pipe, a drainage branch pipe, and a secondary water supply pipe, wherein the main water supply pipe, the drainage branch pipe, and the secondary water supply pipe are connected by a tee structure, and the main water supply pipe and the drainage branch pipe are connected in parallel to the secondary water supply pipe; a second electric valve is provided in the secondary water supply pipe to control the opening and closing of the secondary water supply pipe; and a first electric valve is provided in the drainage branch pipe to control the opening and closing of the drainage branch pipe.
[0008] Furthermore, the opening and closing states of both the first and second electric valves are controlled by the control system. In the control system, the first and second electric valves are controlled by reverse linkage through PLC programming to achieve electrical interlocking and software logic interlocking. The control system includes a delay module, which delays the closing of the first electric valve and the opening of the second electric valve by three to ten seconds after receiving a fire signal. The delay time of the delay module can be manually adjusted.
[0009] Furthermore, the second electric valve is an explosion-proof electric ball valve, with a protection rating of IP68, an explosion-proof rating of ExdIICT6, a response time of less than or equal to 1 second, a sealing rating of API6D, and a leakage rate of less than or equal to 0.1% of the rated flow.
[0010] Furthermore, the control system is equipped with an RS485 communication interface, which allows it to communicate with the power plant's DCS system in real time. The control system also supports switching between three control modes: local, disconnection, and remote.
[0011] Furthermore, the main water supply pipe is equipped with a manual butterfly valve, a fire shower valve, and a leakage detection sensor. The fire shower valve is installed downstream of the manual butterfly valve in the main water supply pipe, and the leakage detection sensor is installed between the fire shower valve and the tee structure.
[0012] Furthermore, the leakage detection sensor is used to measure the amount of leakage and feed it back to the control system to achieve visual monitoring of the leakage.
[0013] Furthermore, the leakage detection sensor is flange-mounted in the straight pipe section between the fire shower valve and the tee structure. The leakage detection sensor is installed 1-2 meters away from the outlet of the fire shower valve, and the detection accuracy of the leakage detection sensor is ±0.5%FS.
[0014] Furthermore, the main water supply pipe, drainage branch pipe, and auxiliary water supply pipe have a diameter of DN25-DN100, and the main water supply pipe, drainage branch pipe, and auxiliary water supply pipe are made of 316 stainless steel. A pressure buffer device is installed at the tee connection of the main water supply pipe, drainage branch pipe, and auxiliary water supply pipe.
[0015] Furthermore, one end of the main water supply pipe is connected to the fire-fighting water supply pipe, and the end of the main water supply pipe connected to the fire-fighting water supply pipe is the water inlet end.
[0016] Furthermore, one end of the auxiliary water supply pipe is connected to the generator fire water pipe, and the end of the auxiliary water supply pipe connected to the generator fire water pipe is the water outlet when the device is working.
[0017] Furthermore, one end of the drainage branch pipe is connected to the recovery water tank, and the end of the drainage branch pipe connected to the recovery water tank is the water outlet when the device is not in operation.
[0018] Furthermore, one end of the drainage branch pipe is connected to the recycling water tank, and a water level sensor is installed at the end of the drainage branch pipe to monitor the drainage volume of the drainage branch pipe.
[0019] Furthermore, one end of the drainage branch pipe is connected to the drainage ditch, and a flow meter is installed at the end of the drainage branch pipe to monitor the drainage volume of the drainage branch pipe.
[0020] The advantages of this utility model compared with the prior art are: (1) This device greatly reduces the risk of pipeline leakage by setting the main water supply pipe and the drainage branch pipe in parallel and controlling the separation of fire water supply and drainage functions through the control system; (2) This device adjusts the opening and closing time of the first electric valve and the second electric valve by using a delay module in the control system, so that the pressure fluctuation in the pipeline is less than or equal to 0.05MPa when fire water supply is used, further ensuring that the water flow transitions smoothly when switching modes. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0022] Figure 2 This is a schematic diagram of the control logic flow of this utility model.
[0023] Attached diagram labels: 10-Main water supply pipe; 20-Fire shower valve; 30-Manual butterfly valve; 40-Drainage branch pipe; 50-First electric valve; 60-Second electric valve; 80-Leakage detection sensor; 90-Auxiliary water supply pipe. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0025] like Figure 1As shown, a leak-proof control device for a deluge valve of a hydro-generator includes a main water supply pipe 10, a drainage branch pipe 40, and a secondary water supply pipe 90. The main water supply pipe 10, the drainage branch pipe 40, and the secondary water supply pipe 90 are connected by a tee structure. The main water supply pipe 10 and the drainage branch pipe 40 are connected in parallel on the secondary water supply pipe 90. The pipe diameters of the main water supply pipe 10, the drainage branch pipe 40, and the secondary water supply pipe 90 are DN25-DN100. The main water supply pipe 10, the drainage branch pipe 40, and the secondary water supply pipe 90 are made of 316 stainless steel. A pressure buffer device is provided at the tee connection of the main water supply pipe 10, the drainage branch pipe 40, and the secondary water supply pipe 90 to absorb the pressure shock of the water.
[0026] like Figure 1 As shown, one end of the main water supply pipe 10 is connected to the fire-fighting water supply pipe, and the end of the main water supply pipe 10 connected to the fire-fighting water supply pipe is the inlet end; one end of the auxiliary water supply pipe 90 is connected to the generator fire-fighting water pipe, and the end of the auxiliary water supply pipe 90 connected to the generator fire-fighting water pipe is the outlet end when the device is working; one end of the drainage branch pipe 40 is connected to the recovery water tank or drainage ditch, and the end of the drainage branch pipe 40 connected to the recovery water tank or drainage ditch is the outlet end when the device is not working; a water level sensor or flow meter is installed at the end of the drainage branch pipe 40. When the end of the drainage branch pipe 40 is connected to the recovery water tank, a water level sensor is selected, and when the end of the drainage branch pipe 40 is connected to the drainage ditch, a flow meter is selected. The water level sensor or flow meter is used to monitor the drainage volume of the drainage branch pipe 40 and feed it back to the control system.
[0027] like Figure 1 As shown, a second electric valve 60 is installed in the auxiliary water supply pipe 90 to control the opening and closing of the auxiliary water supply pipe 90. The second electric valve 60 is an explosion-proof electric ball valve with a protection rating of IP68, an explosion-proof rating of ExdIICT6, a response time of ≤1 second, a sealing rating of API6D, and a leakage rate of ≤0.1% of the rated flow. A first electric valve 50 is installed in the drainage branch pipe 40 to control the opening and closing of the drainage branch pipe 40.
[0028] like Figure 1 and Figure 2As shown, the opening and closing states of the first electric valve 50 and the second electric valve 60 are both controlled by the control system. In the control system, the first electric valve 50 and the second electric valve 60 are controlled by reverse linkage through PLC programming to achieve electrical interlocking and software logic interlocking. The control system includes a delay module, which delays the closing of the first electric valve 50 and the opening of the second electric valve 60 by three to ten seconds after receiving a fire signal. The delay time of the delay module can be manually adjusted. The control system has an RS485 communication interface, which can communicate with the power plant's DCS system in real time. The control system also supports switching between three control modes: local, cut-off, and remote.
[0029] like Figure 1 As shown, the main water supply pipe 10 is equipped with a manual butterfly valve 30, a fire shower valve 20, and a leakage detection sensor 80. The fire shower valve 20 is installed downstream of the manual butterfly valve 30 in the main water supply pipe 10. The leakage detection sensor 80 is installed between the fire shower valve 20 and the tee structure. The leakage detection sensor 80 is used to detect the leakage volume and feed it back to the control system to achieve visual monitoring of the leakage. The leakage detection sensor 80 is flange-mounted in the straight pipe section between the fire shower valve 20 and the tee structure. The leakage detection sensor 80 is installed 1-2 meters away from the outlet of the fire shower valve 20. The detection accuracy of the leakage detection sensor 80 is ±0.5%FS.
[0030] The operating logic of this device is as follows:
[0031] Normal mode: The fire-fighting water supply pipe connected to one end of the main water supply pipe 10 provides water. At this time, the fire shower valve 20 in the main water supply pipe 10 is closed, the manual butterfly valve 30 is open, the first electric valve 50 is open, and the second electric valve 60 is closed. At this time, the device maintains a low pressure state through the drainage branch pipe, and the leakage of the fire shower valve 20 in the main water supply pipe 10 is ≤0.1L / h.
[0032] Firefighting mode:
[0033] When the fire protection system receives signals from any two of the eight smoke detectors and eight heat detectors in the generator pit, and any two of the smoke detectors and any two of the heat detectors are activated, it is determined that a fire has occurred. The control system then executes the following procedure:
[0034] 1. First, the unit should be shut down immediately;
[0035] 2. The fire shower valve 20 in the main water supply pipe 10 is opened, and the control system simultaneously triggers the delay module;
[0036] 3. After the control system signal is delayed by the module, the first electric valve 50 is closed after 5 seconds. At the same time, the second electric valve 60 is opened. Thus, the fire water enters the main water supply pipe 10, passes through the manual butterfly valve 30, the fire shower valve 20 and the leakage detection sensor 80, and finally enters the auxiliary water supply pipe 90 through the second electric valve 60. Finally, the auxiliary water supply pipe 90 enters the motor fire water pipe to extinguish the generator fire. At this time, the overall response time of this device is ≤2 seconds.
[0037] During fire water supply, the control system delays the opening and closing of the first electric valve 50 and the second electric valve 60, so that the water initially flushed out of the main water supply pipe 10 does not directly flow into the auxiliary water supply pipe 90. Instead, the water that has been initially depressurized through the drainage branch pipe 40 enters the auxiliary water supply pipe 90 through the second electric valve 60. Under these conditions, after testing (at a working pressure of 0.6 MPa), the delay module can ensure that the pressure fluctuation in the auxiliary water supply pipe 90 is less than 0.05 MPa, thus ensuring a smooth water flow transition during mode switching.
[0038] Leak detection mode:
[0039] In normal operation, if the leak detection sensor 80 detects a flow rate greater than 0.5 L / h or abnormal pressure fluctuation between the fire shower valve 20 and the three-way connection structure, the leak detection sensor 80 will send a signal to the control system. The control system will immediately send a control signal to open the first electric valve 50 and close the second electric valve 60, so as to achieve rapid discharge of leaked water and maintain low system pressure. Compared with the existing single-pipe solution, the risk of leakage is reduced by 99%.
[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.
Claims
1. A leakage prevention control device for a hydraulic generator deluge valve, characterized by: It includes a main water supply pipe (10), a drainage branch pipe (40), and a secondary water supply pipe (90). The main water supply pipe (10), the drainage branch pipe (40), and the secondary water supply pipe (90) are connected by a T-junction. The main water supply pipe (10) and the drainage branch pipe (40) are connected in parallel on the secondary water supply pipe (90). A second electric valve (60) is provided in the auxiliary water supply pipe (90) to control the opening and closing of the auxiliary water supply pipe (90); The drainage branch pipe (40) is provided with a first electric valve (50) to control the opening and closing of the drainage branch pipe (40); The opening and closing states of the first electric valve (50) and the second electric valve (60) are both controlled by the control system. In the control system, the first electric valve (50) and the second electric valve (60) achieve reverse linkage control of electrical interlock and software logic interlock through PLC programming. The control system includes a delay module that, after receiving a fire signal, delays for three to ten seconds to close the first electric valve (50) and open the second electric valve (60). The delay time of the delay module can be manually adjusted.
2. The leakage-proof control device for the rain valve of the hydroelectric generator according to claim 1, characterized in that: The second electric valve (60) is an explosion-proof electric ball valve. The second electric valve (60) has an IP68 protection rating, an ExdIICT6 explosion-proof rating, a response time of less than or equal to 1 second, an API6D sealing rating, and a leakage rate of less than or equal to 0.1% of the rated flow.
3. The anti-leakage control device for a hydro-generator deluge valve according to claim 1, characterized in that: The control system is equipped with an RS485 communication interface, which allows it to communicate with the power plant's DCS system in real time. The control system also supports switching between three control modes: local, cut-off, and remote.
4. The leakage-proof control device for the rain valve of a hydroelectric generator according to claim 1, characterized in that: The main water supply pipe (10) is equipped with a manual butterfly valve (30), a fire shower valve (20), and a leakage detection sensor (80). The fire shower valve (20) is installed downstream of the manual butterfly valve (30) in the main water supply pipe (10), and the leakage detection sensor (80) is installed between the fire shower valve (20) and the tee structure.
5. The leakage-proof control device for the rain valve of a hydroelectric generator according to claim 4, characterized in that: The leakage detection sensor (80) is used to detect the amount of leakage and feed it back to the control system to achieve visual monitoring of the leakage.
6. The leakage-proof control device for the rain valve of a hydroelectric generator according to claim 4, characterized in that: The leakage detection sensor (80) is flange-mounted in the straight pipe section between the fire shower valve (20) and the tee structure. The leakage detection sensor (80) is installed 1-2 meters away from the outlet of the fire shower valve (20). The detection accuracy of the leakage detection sensor (80) is ± 0.5%FS.
7. The leakage-proof control device for the rain valve of a hydroelectric generator according to claim 1, characterized in that: The main water supply pipe (10), drainage branch pipe (40), and auxiliary water supply pipe (90) have a diameter of DN25-DN100. The main water supply pipe (10), drainage branch pipe (40), and auxiliary water supply pipe (90) are made of 316 stainless steel. A pressure buffer device is installed at the tee connection of the main water supply pipe (10), drainage branch pipe (40), and auxiliary water supply pipe (90).
8. The leakage-proof control device for the rain valve of a hydroelectric generator according to claim 1, characterized in that: One end of the main water supply pipe (10) is connected to the fire-fighting water supply pipe, and the end of the main water supply pipe (10) connected to the fire-fighting water supply pipe is the water inlet end; One end of the auxiliary water supply pipe (90) is connected to the generator fire water pipe, and the end of the auxiliary water supply pipe (90) connected to the generator fire water pipe is the water outlet when the device is working. One end of the drainage branch pipe (40) is connected to the recycling water tank, and the end of the drainage branch pipe (40) connected to the recycling water tank is the water outlet when the device is not in operation.
9. The leakage-proof control device for the rain valve of a hydroelectric generator according to claim 8, characterized in that: One end of the drainage branch pipe (40) is connected to the recycling water tank, and a water level sensor is provided at the end of the drainage branch pipe (40) to monitor the drainage volume of the drainage branch pipe (40).
10. The leakage prevention control device for a hydraulic generator rain valve according to claim 8, characterized in that: One end of the drainage branch pipe (40) is connected to the drainage ditch, and a flow meter is installed at the end of the drainage branch pipe (40) to monitor the drainage volume of the drainage branch pipe (40).