Centrifugal pump water delivery pipeline with automatic air exhaust device

Abstract

The invention relates to the technical field of production auxiliary equipment of explosive production workshops, in particular to a centrifugal pump water delivery pipeline with an automatic air exhaust device, which comprises a low-position reservoir, a bottom valve is arranged in the low-position reservoir, a connecting pipe is arranged on the bottom valve, a first branch pipe and a second branch pipe are arranged on the connecting pipe, the first branch pipe is connected with a water replenishing pipeline, and the second branch pipe is connected with the water replenishing pipeline. The first branch pipe is provided with a water injection valve, the second branch pipe is provided with an exhaust valve and a conical hopper, the conical hopper is located behind the exhaust valve, a liquid level detection probe is arranged in the conical hopper, water is injected into the connecting pipeline through the water injection valve, so that water flows into the conical hopper, the liquid level detection probe in the conical hopper detects the water level, and meanwhile the exhaust valve and the water injection valve are controlled to be closed. Compared with the prior art, water injection and exhaust operation can be automatically conducted on the suction inlet pipeline before the centrifugal pump body is started, and therefore it is guaranteed that the suction inlet pipeline can be filled with water when the centrifugal pump body is started.

Description

Technical Field

[0001] The invention relates to the technical field of production auxiliary equipment in an explosive production workshop, in particular to a centrifugal pump water delivery pipeline with an automatic air exhaust device. Background Art

[0002] The elevated water tank in the explosives production workshop is approximately 50 meters above the production line. This height difference provides water for production and firefighting. To ensure a sufficient level of water in the elevated water tank, a centrifugal pump is used to pump water from the lower reservoir to the elevated water tank. Currently, water replenishment is performed manually by starting and stopping the pump. The centrifugal pump piping system includes a bottom valve, which primarily serves as a one-way, sealing function to ensure air is free from the centrifugal pump's suction pipe. However, impurities in the water and wear often prevent the valve from sealing properly, preventing the centrifugal pump from pumping properly. Currently, the suction pipe must be manually filled and vented before the pump can start properly. However, manual filling is tedious, time-consuming, and labor-intensive, placing heavy strain on operators. Therefore, a centrifugal pump water supply pipeline with an automatic air venting device is urgently needed to automatically control manual filling and venting. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a centrifugal pump water delivery pipeline with an automatic air exhaust device, which can realize automatic control of artificial water injection and exhaust.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a centrifugal pump water delivery pipeline with an automatic air exhaust device, comprising:

[0005] High-level water storage tank, which is equipped with a float liquid level switch, a water supply pipe is provided on the bottom of the side wall of the high-level water storage tank, and a production water pipe is provided on the water supply pipe;

[0006] A low-level water storage tank is provided with a bottom valve in the low-level water storage tank, a connecting pipe is provided on the bottom valve, a first branch pipe and a second branch pipe are provided on the connecting pipe, the first branch pipe is connected to the water supply pipe, a water injection valve is provided on the first branch pipe, an exhaust valve and a cone bucket are provided on the second branch pipe, the cone bucket is located behind the exhaust valve, and a liquid level detection probe is provided in the cone bucket;

[0007] A liquid level relay, the liquid level relay is electrically connected to the liquid level detection probe;

[0008] The centrifugal pump body is connected to the connecting pipe, the connecting pipe is connected to the water supply pipe, and the suction pipe of the centrifugal pump is located behind the water injection valve and the exhaust valve;

[0009] The PLC controller is electrically connected with the water injection valve, the exhaust valve, the float liquid level switch, the liquid level relay and the centrifugal pump body.

[0010] Furthermore, a solenoid valve is provided on the production water pipe, and the battery valve is electrically connected to the PLC controller.

[0011] Furthermore, the exhaust valve is located between the centrifugal pump body and the water injection valve.

[0012] Furthermore, the effective volume of the cone bucket is 1.5 times greater than the volume of the connecting pipe section between the exhaust valve and the bottom valve.

[0013] Furthermore, the liquid level detection probe includes a high-level probe and a low-level probe, and the vertical distance between the two is 10-15 cm.

[0014] The beneficial effect of the present invention is that, compared with the prior art, the suction port pipe is automatically filled with water and exhausted before the centrifugal pump body is started, thereby ensuring that the suction port pipe is filled with water when the centrifugal pump body is started. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a centrifugal pump water delivery pipeline with an automatic air exhaust device according to a specific embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the circuit connection structure of the PLC control of the present invention.

[0017] Description of labels:

[0018] 1. High-level water storage tank; 11. Float level switch; 12. Water supply pipe; 13. Production water pipe; 131. Battery valve;

[0019] 2. Low-level water storage tank;

[0020] 3. Bottom valve; 31. Connecting pipe; 311. First branch pipe; 3111. Water filling valve; 312. Second branch pipe; 3121. Exhaust valve; 3122. Cone bucket;

[0021] 4. Liquid level detection probe; 41. Low level probe; 42. High level probe;

[0022] 5. Liquid level relay;

[0023] 6. Centrifugal pump body;

[0024] 7. PLC controller. DETAILED DESCRIPTION

[0025] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0026] Please refer to Figure 1 as well as Figure 2 , a centrifugal pump water pipeline with an automatic air exhaust device, comprising:

[0027] A high-level water reservoir 1 is provided with a float liquid level switch 11 in the high-level water reservoir 1. A water supply pipe 12 is provided on the bottom of the side wall of the high-level water reservoir 1, and a production water pipe 13 is provided on the water supply pipe 12;

[0028] A low-level water reservoir 2 is provided in the low-level water reservoir 2. A bottom valve 3 is provided on the bottom valve 3. A connecting pipe 31 is provided on the connecting pipe 31. A first branch pipe 311 and a second branch pipe 312 are provided on the connecting pipe 31. The first branch pipe 311 is connected to the water supply pipe 12. A water injection valve 3111 is provided on the first branch pipe 311. The second branch pipe 312 is provided with an exhaust valve 3121 and a cone hopper 3122. The cone hopper 3122 is located behind the exhaust valve 3121. A liquid level detection probe 4 is provided in the cone hopper 3122.

[0029] The liquid level relay 5 is electrically connected to the liquid level detection probe 4;

[0030] The centrifugal pump body 6 is connected to the connecting pipe 31, which is connected to the water supply pipe 12. The suction pipe of the centrifugal pump is located after the water injection valve 3111 and the exhaust valve 3121;

[0031] The PLC controller 7 is electrically connected to the water injection valve 3111 , the exhaust valve 3121 , the float liquid level switch 11 , the liquid level relay 5 and the centrifugal pump body 6 .

[0032] In the above embodiment, when the production water pipe is used to output water from the high-level water reservoir 1, and the water level in the high-level water reservoir 1 drops to a certain height, the float level switch 11 transmits a signal to the PLC controller 7. The PLC controller 7 first opens the exhaust valve 3121, and then opens the water injection valve 3111 0.5 seconds later. The water in the high-level water reservoir 1 is injected into the connecting pipe 31 through the first branch pipe 311, and the gas in the connecting pipe 31 is discharged from the cone 3122, thereby allowing the water in the connecting pipe 31 to flow into the cone 3122. When the liquid level detection probe 4 detects the water level in the cone 3122, it transmits a detection signal to the PLC controller 7 through the liquid level relay 5. The PLC controller 7 simultaneously controls the exhaust valve 3121 and the water injection valve 3111 to stop, and starts the centrifugal pump to inject water into the high-level water reservoir 1. Compared with the existing technology, it can realize automatic control of manual water injection and exhaust.

[0033] As an optional implementation, a solenoid valve is provided on the production water pipe, and the battery valve 131 is electrically connected to the PLC controller 7 .

[0034] In the above embodiment, the solenoid valve is opened and the production water pipe outputs water. When the float liquid level switch 11 transmits a signal to the PLC controller 7, the PLC controller 7 opens the exhaust valve 3121 and the water injection valve 3111.

[0035] As an optional embodiment, the exhaust valve 3121 is located between the centrifugal pump body 6 and the water injection valve 3111 .

[0036] As an optional embodiment, the effective volume of the cone bucket 3122 is greater than 1.5 times the volume of the pipe section of the connecting pipe 31 between the exhaust valve 3121 and the bottom valve 3.

[0037] In the above embodiment, the volume ratio is limited to ensure that the cone bucket 3122 has enough space to accommodate the gas and part of the water discharged from the pipeline, avoiding premature triggering of the liquid level probe resulting in incomplete exhaust and ensuring the effectiveness of water injection.

[0038] As an optional embodiment, the liquid level detection probe 4 includes a high-level probe 42 and a low-level probe 41 , and the vertical distance between the two is 10-15 cm.

[0039] In the above embodiment, when the low-level probe detects the water level, the water injection valve 3111 and the exhaust valve 3121 are maintained open. When the high-level probe detects the water level, the water injection valve 3111 and the exhaust valve 3121 are synchronously closed and the centrifugal pump is started. By setting the low-level probe 41 to trigger, it is possible to ensure that gas is discharged from the pipeline and water flows into the cone 3122. The high-level probe 42 is triggered to ensure that sufficient water accumulates in the cone 3122, forming a water seal to prevent gas from entering the cone, and completely avoiding the risk of cavitation when starting the centrifugal pump body 6.

[0040] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A centrifugal pump water pipeline with an automatic air exhaust device, characterized in that: include: High-level water storage tank, which is equipped with a float liquid level switch, a water supply pipe is provided on the bottom of the side wall of the high-level water storage tank, and a production water pipe is provided on the water supply pipe; A low-level water storage tank is provided with a bottom valve in the low-level water storage tank, a connecting pipe is provided on the bottom valve, a first branch pipe and a second branch pipe are provided on the connecting pipe, the first branch pipe is connected to the water supply pipe, a water injection valve is provided on the first branch pipe, an exhaust valve and a cone bucket are provided on the second branch pipe, the cone bucket is located behind the exhaust valve, and a liquid level detection probe is provided in the cone bucket; A liquid level relay, the liquid level relay is electrically connected to the liquid level detection probe; The centrifugal pump body is connected to the connecting pipe, the connecting pipe is connected to the water supply pipe, and the suction pipe of the centrifugal pump is located behind the water injection valve and the exhaust valve; The PLC controller is electrically connected with the water injection valve, the exhaust valve, the float liquid level switch, the liquid level relay and the centrifugal pump body.

2. The centrifugal pump water delivery pipeline with an automatic air exhaust device according to claim 1, characterized in that: The production water pipe is equipped with a solenoid valve, and the battery valve is electrically connected to the PLC controller.

3. The centrifugal pump water delivery pipeline with an automatic air exhaust device according to claim 1, characterized in that: The exhaust valve is located between the centrifugal pump body and the water injection valve.

4. The centrifugal pump water delivery pipeline with an automatic air exhaust device according to claim 1, characterized in that: The effective volume of the cone bucket is 1.5 times greater than the volume of the connecting pipe section between the exhaust valve and the bottom valve.

5. The centrifugal pump water delivery pipeline with an automatic air exhaust device according to claim 1, characterized in that: The liquid level detection probe includes a high-level probe and a low-level probe, and the vertical distance between the two is 10-15cm.

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