Water filling control system for overhauling drainage pump
By configuring a separate water-filling solenoid valve for each maintenance drainage pump and using the cooperation of the PLC controller and time relay, the problems of long and large water filling time are solved, and the rapid and effective water filling effect is achieved, the success rate of the drainage pump is improved, and the drainage safety of the factory is ensured.
Patent Information
- Application Number
- CN202422303771.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-21
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-21
AI Technical Summary
In the prior art, the maintenance drainage pump has problems such as long filling time, large water filling amount and inconsistent pressure during the filling process, resulting in failure in startup and affecting the safety of the factory drainage.
Each maintenance drainage pump is equipped with a separate water charging solenoid valve, and the water charging process is controlled through a PLC controller and a time relay to ensure that each pump is independently charged, reducing the water charging time and amount, and improving the water charging effect.
Through independent water filling control, the water filling time and amount are significantly reduced, the water pumping success rate of the drainage pump is improved, and the safety of the drainage in the factory is ensured.
Smart Images
Figure CN223190602U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a control system, in particular to a water filling control system for a maintenance drainage pump. Background Art
[0002] The maintenance drainage system is used to drain the collected water in the flow channel and the leakage water of the upstream and downstream gates during the maintenance of the unit, so as to facilitate the maintenance of the unit.
[0003] At present, the power plant where the inventor is located is equipped with No. 1, 2, 3, and 4 maintenance drainage pumps to pump the leakage water in the maintenance drainage corridor. When the water level in the maintenance drainage corridor is normal (a water level sensor for measuring the water level is arranged in the maintenance drainage corridor), the PLC controller controls one maintenance drainage pump to work. When the water level is too high, the PLC controller will control two or more drainage pumps to work. Generally, the drainage pump needs to be filled with water and exhausted before use. However, these four maintenance drainage pumps share a single water filling solenoid valve. Whether one or more maintenance drainage pumps are used, after the PLC controller controls the water filling solenoid valve to conduct, the water filling tank will fill water for the four maintenance drainage pumps. However, it takes longer water filling time and more water filling volume to fill water for the four water pumps. Moreover, problems may occur during the water filling process of the four drainage pumps, such as inconsistent pressure changes in the pumps (caused by poor exhaust of gas in the pumps), which will cause insufficient water filling for the drainage pump with a large pressure, resulting in its startup failure and seriously affecting the drainage safety of the plant. Content of the Utility Model
[0004] The technical problem to be solved by the utility model is to provide a water filling control system for a maintenance drainage pump, in which different maintenance drainage pumps are connected with separate water filling solenoid valves, which can effectively reduce the water filling time and water filling volume, and ensure the water filling effect of the maintenance drainage pump and improve the pumping success rate of the drainage pump.
[0005] To solve the above technical problems, the utility model adopts the following technical solutions:
[0006] An overhaul drainage pump water filling control system includes an overhaul drainage pump, a water filling solenoid valve, a water level sensor, a PLC controller, a time relay, a water filling tank and a pipeline; the distinguishing feature is that multiple overhaul drainage pumps are provided, the number of water filling solenoid valves is equal to the number of overhaul drainage pumps, one overhaul drainage pump is connected to one water filling solenoid valve, the input end of the water filling solenoid valve is connected to the water outlet end of the water filling tank through a pipeline, and the output end of the water filling solenoid valve is connected to the water filling end of the overhaul drainage pump through a pipeline; the water inlet end of the overhaul drainage pump is connected to the sump in the overhaul drainage gallery through a pipeline, and the water outlet end of the overhaul drainage pump is connected to the downstream drainage outlet through a pipeline; the water level sensor is arranged in the overhaul drainage gallery; the PLC controller is electrically connected to the water level sensor and the overhaul drainage pump respectively; the number of time relays is equal to the number of water filling solenoid valves, one time relay is correspondingly connected to one water filling solenoid valve, and the time relay is electrically connected between the PLC controller and the water filling solenoid valve.
[0007] The beneficial effects of the present utility model are:
[0008] For the overhaul drainage pump water filling control system provided by the present utility model, when the water level sensor detects that the water level in the sump of the overhaul drainage gallery reaches the water level for starting the overhaul drainage pump, it feeds back the detection signal to the PLC controller. If the water level is at the normal level, it controls one of the time relays to time, and controls the water filling solenoid valve connected to this time relay to conduct. At this time, water flows from the water filling tank to the overhaul drainage pump connected to this water filling solenoid valve and fills it. After the time relay finishes timing, the PLC controller controls the water filling solenoid valve to disconnect, and controls this overhaul drainage pump to start and start draining; if the water level is too high and more than two overhaul drainage pumps are needed, for example, two are needed, then the PLC controller controls two time relays to time, and controls the water filling solenoid valves connected to these two time relays to conduct, and fills these two overhaul drainage pumps through the water filling tank. After the time relay finishes timing, the PLC controller controls these two overhaul drainage pumps to start and start draining; thus, compared with the prior art, different overhaul drainage pumps are connected with separate water filling solenoid valves. If several overhaul drainage pumps are needed, the PLC controller can control the water filling solenoid valves connected to them to conduct, without filling water for all the overhaul drainage pumps, which can effectively reduce the water filling time and water filling volume, and ensure the water filling effect of the overhaul drainage pump and improve the pumping success rate of the drainage pump. Description of the Drawings
[0009] Figure 1 is the structural schematic diagram of the embodiment of the present utility model.
[0010] Figure 2 is the principle block diagram of the embodiment of the present utility model. Detailed Embodiment
[0011] The present utility model will be described below in conjunction with the accompanying drawings. The specific embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope of the present utility model.
[0012] As Figure 1 and Figure 2 shown, the water filling control system of the maintenance drainage pump in this embodiment includes a maintenance drainage pump, a water filling solenoid valve, a water level sensor, a PLC controller, a time relay, a water filling tank and a pipeline.
[0013] Table 1
[0014]
[0015] As shown in Table 1, this table shows Figure 1 the names of the components represented by the symbols in Figure 1 and the numbers in
[0016] are the numbers of the components. Among them, multiple maintenance drainage pumps are provided. In this embodiment, four maintenance drainage pumps are provided, namely, No. 1, No. 2, No. 3 and No. 4 maintenance drainage pumps.
[0017] The number of water filling solenoid valves is equal to the number of maintenance drainage pumps. Accordingly, there are four water filling solenoid valves in this embodiment. One maintenance drainage pump is connected to one water filling solenoid valve. The input end of the water filling solenoid valve is connected to the water outlet end of the water filling tank through a pipeline. A stop valve is provided on the pipeline between the water filling solenoid valve and the water filling tank, specifically three stop valves (0266, 0264, 0264-1). These three stop valves are all normally open valves. Among them, the input end of stop valve 0266 is connected to the water outlet end of the water filling tank through a pipeline. The output end of stop valve 0266 is connected to the input end of stop valve 0264 through a pipeline. The output end of stop valve 0264 is connected to the input end of stop valve 0264-1 through a pipeline. The output end of stop valve 0264-1 is connected to the input ends of the four water filling solenoid valves through a pipeline. The water filling ends of the four maintenance drainage pumps are connected to a branch pipeline. The four branch pipelines converge on a main pipeline. This main pipeline is connected to the output end of stop valve 0264-1. A pipeline is connected between the output end of stop valve 0266 and stop valve 0264-1. A normally closed valve 0265 is provided on this pipeline. The water filling tank is connected to a pipeline. A normally closed valve 0267 and a normally closed valve 0268 are provided on this pipeline. A pipeline is connected to the pipeline between the water filling tank and the water filling solenoid valve. This pipeline is used to connect to the fire pipeline. A pressure reducing valve, a stop valve, a pressure gauge and a pressure gauge cock are provided on this pipeline. This pipeline is specifically connected between the output end of stop valve 0266 and the input end of stop valve 0264. The water inlet end and the water outlet end of the water filling tank can share a port, and the water filling tank is filled with water by connecting to the fire pipeline.
[0018] The output end of the water filling solenoid valve is connected to the water filling end of the maintenance drainage pump through a pipeline. A check valve is provided on the pipeline between the water filling end of the maintenance drainage pump and the output end of the water filling solenoid valve. In this embodiment, the numbers of the water filling solenoid valves connected to the 1st, 2nd, 3rd and 4th maintenance drainage pumps are 0236, 0237, 0238 and 0235 respectively. The function of the check valve is to prevent water from flowing back.
[0019] The water inlet end of the maintenance drainage pump is connected to the sump pit of the maintenance drainage gallery through a pipeline. A pressure gauge cock, a pressure gauge, a butterfly valve and a foot valve are sequentially provided on the pipeline between the water inlet end of each maintenance drainage pump and the sump pit of the maintenance drainage gallery. Among them, the output end of the butterfly valve is connected to the water inlet end of the maintenance drainage pump through a pipeline. The input end of the butterfly valve is connected to the output end of the foot valve. The pressure gauge cock and the pressure gauge are sequentially connected to the pipeline between the water inlet end of the maintenance drainage pump and the input end of the butterfly valve. The foot valve is provided in the sump pit of the maintenance drainage gallery.
[0020] The water outlet end of the maintenance drainage pump is connected to the downstream drainage outlet through a pipeline. A pressure gauge cock, a pressure gauge, a check valve, and a butterfly valve are sequentially arranged on the pipeline between the water outlet end of each maintenance drainage pump and the downstream drainage outlet. Among them, the input end of the check valve is connected to the output end of the maintenance drainage pump through a pipeline, the output end of the check valve is connected to the input end of the butterfly valve through a pipeline, the pressure gauge cock and the pressure gauge are sequentially connected to the pipeline between the water outlet end of the maintenance drainage pump and the input end of the check valve, and the output end of the butterfly valve is connected to the downstream drainage outlet through a pipeline.
[0021] A stop valve and an automatic air valve are arranged at the exhaust end of each maintenance drainage pump. The input end of the stop valve is connected to the exhaust end of the maintenance drainage pump through a pipeline, and the input end of the automatic air valve is connected to the output end of the stop valve.
[0022] The water level sensor is arranged in the maintenance drainage gallery for detecting the water level in the maintenance drainage gallery.
[0023] The PLC controller is electrically connected to the water level sensor and the four maintenance drainage pumps respectively.
[0024] The number of time relays is equal to the number of water filling solenoid valves. There are four time relays. One time relay is correspondingly connected to one water filling solenoid valve, and the time relay is electrically connected between the PLC controller and the water filling solenoid valve. After the PLC controller controls the time relay to conduct, it starts timing and simultaneously controls the water filling solenoid valve to conduct.
[0025] The working principle of the utility model is as follows: When the water level sensor detects that the water level in the inspection drainage gallery sump reaches the water level for starting the inspection drainage pump, it feeds back the detection signal to the PLC controller. If the water level is at the normal level, only one drainage inspection pump is needed for drainage. For example, if only the No. 1 inspection drainage pump is started, the time relay connected to the water filling solenoid valve 0236 by the PLC controller conducts and starts timing. At the same time, the PLC controller controls the water filling solenoid valve 0236 to conduct. At this time, water flows through the water filling tank, stop valves (0266, 0264, 0264-1), water filling solenoid valve 0236 and check valve to the No. 1 inspection drainage pump and fills it with water. After the time relay finishes timing, the PLC controller controls the water filling solenoid valve 0236 to disconnect and controls the No. 1 inspection drainage pump to start and drain water. If the water level is too high and more than two inspection drainage pumps are needed, such as the No. 1 and No. 2 inspection drainage pumps, the PLC controller controls the time relays connected to the water filling solenoid valve 0236 and the water filling solenoid valve 0237 to time, and controls the water filling solenoid valve 0236 and the water filling solenoid valve 0237 to conduct. Water flows through the water filling tank, stop valves (0266, 0264, 0264-1), water filling solenoid valve 0236 and check valve, water filling solenoid valve 0237 and check valve to the No. 1 inspection drainage pump and the No. 2 inspection drainage pump respectively and fills them with water. After the time relay finishes timing, the PLC controller controls the water filling solenoid valve 0236 and the water filling solenoid valve 0237 to disconnect, and the PLC controller controls the No. 1 and No. 2 inspection drainage pumps to start and drain water.
[0026] Therefore, compared with the prior art, for this control system, separate water filling solenoid valves are connected to different inspection drainage pumps. To use several inspection drainage pumps, the PLC controller only needs to control the connected water filling solenoid valves to conduct, without filling water for all inspection drainage pumps, which can effectively reduce the water filling time and water filling volume, ensure the water filling effect of the inspection drainage pumps and improve the pumping success rate of the drainage pumps.
Claims
1. A water filling control system for a maintenance drainage pump, comprising a maintenance drainage pump, a water filling solenoid valve, a water level sensor, a PLC controller, a time relay, a water filling tank and a pipeline; characterized by: There are multiple maintenance drainage pumps, and the number of water filling solenoid valves is equal to the number of maintenance drainage pumps. One maintenance drainage pump is connected to a water filling solenoid valve, and the input end of the water filling solenoid valve is connected to the water outlet end of the water filling tank through a pipe, and the output end of the water filling solenoid valve is connected to the water filling end of the maintenance drainage pump through a pipe; the water inlet end of the maintenance drainage pump is connected to the sump of the maintenance drainage gallery through a pipe, and the water outlet end of the maintenance drainage pump is connected to the downstream drain outlet through a pipe; the water level sensor is arranged in the maintenance drainage gallery; the PLC controller is electrically connected to the water level sensor and the maintenance drainage pump respectively; the number of time relays is equal to the number of water filling solenoid valves, one time relay is connected to one water filling solenoid valve, and the time relay is electrically connected between the PLC controller and the water filling solenoid valve.
2. The water filling control system for the maintenance drainage pump according to claim 1, characterized in that: A stop valve is provided on the pipeline between the water filling solenoid valve and the water filling tank.
3. The water filling control system for the maintenance drainage pump according to claim 1, characterized in that: The pipeline between the water filling tank and the water filling solenoid valve is connected with a pipeline, which is used to connect the fire-fighting pipeline; the pipeline is provided with a pressure reducing valve, a stop valve, a pressure gauge and a pressure gauge cock.
4. The water filling control system for the maintenance drainage pump according to claim 1, characterized in that: A check valve is provided on the pipeline between the water filling end of the maintenance drainage pump and the output end of the water filling solenoid valve.
5. The water filling control system for the maintenance drainage pump according to claim 1, characterized in that: The pipeline between the water inlet end of the maintenance drainage pump and the sump of the maintenance drainage gallery is sequentially provided with a pressure gauge cock, a pressure gauge, a butterfly valve and a bottom valve.
6. The water filling control system for the maintenance drainage pump according to claim 1, characterized in that: A pressure gauge cock, a pressure gauge, a check valve and a butterfly valve are sequentially arranged on the pipeline between the water outlet end of the maintenance drainage pump and the downstream drainage outlet.
7. The maintenance drainage pump water filling control system according to claim 1, characterized in that: The exhaust end of the maintenance drainage pump is provided with a stop valve and an automatic air valve.