Automatic control system of submersible pump

Abstract

The invention relates to the technical field of submersible pump control, in particular to a submersible pump automatic control system. The pipeline is arranged in the water pool, and a submersible pump is arranged on the inner side of the pipeline; a high-pressure port and a low-pressure port of the differential pressure transmitter are arranged on the inner side of the pipeline and located at the two ends of the submersible pump respectively. In the application, when the pressure difference detected by the differential pressure transmitter exceeds the preset pressure difference range, the pressure difference between the two ends of the submersible pump exceeds a reasonable range, and the submersible pump is blocked to a certain extent, the first end of the switching valve can be communicated with the third end of the switching valve, so that the pressure difference between the two ends of the submersible pump is reduced; the submersible pump is arranged in the pool, so that water pumped in the submersible pump is mixed with water in the pool again, sediment residues in the pool can be mixed with water in the pool, the sediment residues are prevented from being gathered, the submersible pump is prevented from being blocked, the pressure difference between the two ends of the submersible pump is reduced, and the pumping effect of the submersible pump on residual water at the bottom of the pool is improved.

Description

Technical Field

[0001] The invention relates to the technical field of submersible pump control, and in particular to an automatic control system for a submersible pump. Background Art

[0002] Submersible pumps are used to extract water from the bottom of the pool. The traditional control method for submersible pumps is to start and stop them manually through manual observation. This control method may cause sediment to accumulate after the water is reduced, which may make the submersible pump less effective in extracting the remaining water at the bottom of the pool. Summary of the invention

[0003] In view of this, the present invention provides an automatic control system for a submersible pump to solve the problem that residual sediments may aggregate and cause poor extraction effect of the submersible pump.

[0004] The present invention provides a submersible pump automatic control system for draining a pool, comprising:

[0005] A pipeline is arranged in the water pool and a submersible pump is arranged inside the pipeline;

[0006] A differential pressure transmitter, wherein the high-pressure port and the low-pressure port of the differential pressure transmitter are both arranged inside the pipeline and respectively located at the two ends of the submersible pump, and are suitable for detecting the pressure difference between the water inlet side and the water outlet side of the submersible pump;

[0007] A switching valve, wherein a first end of the switching valve is connected to an end of the pipeline close to the water outlet side of the submersible pump, a second end of the switching valve is connected to the outside of the pool, and a third end of the switching valve is connected to the inside of the pool;

[0008] A liquid level sensor, disposed in the water pool and adapted to detect the water level in the water pool;

[0009] A controller, wherein the differential pressure transmitter, the switching valve, the submersible pump and the liquid level sensor are respectively connected to the controller, and a preset pressure difference range is set in the controller;

[0010] During operation, the controller controls the submersible pump to start. When the pressure difference detected by the differential pressure transmitter is within the preset pressure difference range, the controller controls the first end of the switching valve to be connected with the second end of the switching valve; when the pressure difference detected by the differential pressure transmitter exceeds the preset pressure difference range, the controller controls the first end of the switching valve to be connected with the third end of the switching valve.

[0011] In the present application, when the pressure difference detected by the differential pressure transmitter is within the preset range of pressure difference, it means that the pressure difference at both ends of the submersible pump is within a reasonable range, the submersible pump is not blocked, and the water in the pool can be continuously pumped out by the submersible pump; when the pressure difference detected by the differential pressure transmitter exceeds the preset range of pressure difference, it means that the pressure difference at both ends of the submersible pump exceeds the reasonable range, and the submersible pump has been blocked to a certain extent. The first end of the switching valve can be connected with the third end of the switching valve so that the water pumped out of the submersible pump can be mixed with the water in the pool again, and the residual sediment in the pool can be mixed with the water in the pool to prevent the residual sediment from aggregating, thereby preventing the submersible pump from being blocked, reducing the pressure difference at both ends of the submersible pump, and improving the submersible pump's extraction effect on the remaining water at the bottom of the pool.

[0012] In an optional embodiment, one end of the pipe close to the water inlet side of the submersible pump is located at the bottom of the pool, which can help the submersible pump to pump out as much water as possible from the pool and increase the pumping effect.

[0013] In an optional embodiment, the high-pressure port of the differential pressure transmitter is arranged at the water outlet side of the submersible pump, and the low-pressure port of the differential pressure transmitter is arranged at the water inlet side of the submersible pump, so that the differential pressure transmitter can produce a correct pressure difference result and prevent the generation of a reverse result or an erroneous result.

[0014] In an optional embodiment, a filter screen is provided in the pipeline, and the filter screen is located at the water inlet side of the submersible pump. The filter screen can filter the water entering the water inlet side of the submersible pump.

[0015] In an optional embodiment, the filter screen is located between the low pressure port of the differential pressure transmitter and the water inlet side of the submersible pump.

[0016] In an optional embodiment, a cutter is provided in the pipeline, the cutter is located on the side of the filter screen away from the submersible pump, the cutter is connected to the controller, and the controller controls the submersible pump and the cutter to operate synchronously. The cutter can break foreign matter entering the water inlet side of the submersible pump in advance to protect the smooth flow of the entire pipeline.

[0017] In an optional embodiment, the low pressure port of the differential pressure transmitter is located between the cutter and the filter.

[0018] In an optional implementation, a warning water level is set in the controller, and when the water level in the water pool is lower than the warning water level, the controller controls the differential pressure transmitter to start working.

[0019] When the water in the pool reaches the warning water level, it indicates that the water level in the pool has decreased, and it is necessary to start detecting the pressure difference at both ends of the submersible pump through a differential pressure transmitter.

[0020] In an optional embodiment, a safety water level is also provided in the controller, and when the water level in the pool is lower than the safety water level, the controller controls the submersible pump to stop working;

[0021] The safe water level is lower than the warning water level.

[0022] The safety water level can be set at the bottom of the pool. When the water level in the pool is lower than the safety water level, the submersible pump may no longer be able to continue pumping water from the pool. At this time, the submersible pump can be stopped to prevent the submersible pump from idling and heating, thereby protecting the submersible pump.

[0023] In an optional implementation, a differential pressure warning value is further provided in the controller, and when the differential pressure detected by the differential pressure transmitter is greater than the differential pressure warning value, the controller controls the submersible pump to stop working.

[0024] When the pressure difference detected by the differential pressure transmitter is greater than the pressure difference warning value, it indicates that the pressure difference at both ends of the submersible pump is too large, which may cause a serious blockage problem, and the submersible pump needs to be stopped in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1. Pipeline; 2. Submersible pump; 3. Differential pressure transmitter; 4. Switching valve; 5. Filter; 6. Cutter. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0030] Combine the following Figure 1 , describing an embodiment of the present invention.

[0031] According to an embodiment of the present invention, there is provided a submersible pump automatic control system for draining a pool, comprising:

[0032] The pipeline 1 is arranged in the water pool, and a submersible pump 2 is arranged inside the pipeline 1; wherein, the pipeline 1 needs to be in the water body of the water pool so that the submersible pump 2 can pump water in the water pool.

[0033] A differential pressure transmitter 3, wherein the high-pressure port and the low-pressure port of the differential pressure transmitter 3 are both arranged inside the pipeline 1 and are respectively located at two ends of the submersible pump 2, and are suitable for detecting the pressure difference between the water inlet side and the water outlet side of the submersible pump 2;

[0034] A switching valve 4, wherein a first end of the switching valve 4 is connected to an end of the pipeline 1 close to the water outlet side of the submersible pump 2, a second end of the switching valve 4 is connected to the outside of the pool, and a third end of the switching valve 4 is connected to the inside of the pool;

[0035] A liquid level sensor, disposed in the water pool and adapted to detect the water level in the water pool;

[0036] The controller, the differential pressure transmitter 3, the switching valve 4, the submersible pump 2 and the liquid level sensor are respectively connected to the controller, and a preset pressure difference range is set in the controller; the differential pressure transmitter 3 can transmit the detected pressure difference signal on the water inlet side and the water outlet side of the submersible pump 2 to the controller, and the liquid level sensor can transmit the detected water level signal in the water pool to the controller.

[0037] When working, the controller controls the submersible pump 2 to start, and when the pressure difference detected by the differential pressure transmitter 3 is within the preset pressure difference range, the controller controls the first end of the switching valve 4 to be connected with the second end of the switching valve 4; when the pressure difference detected by the differential pressure transmitter 3 exceeds the preset pressure difference range, the controller controls the first end of the switching valve 4 to be connected with the third end of the switching valve 4. The preset pressure difference range is the pressure difference range at both ends of the submersible pump 2 when blockage begins to occur and the blockage is not serious. The controller compares the pressure difference detected by the differential pressure transmitter 3 with the preset pressure difference range to determine whether the pressure difference detected by the differential pressure transmitter 3 is within the preset pressure difference range.

[0038] In the present application, when the pressure difference detected by the differential pressure transmitter 3 is within the preset range of pressure difference, it means that the pressure difference at both ends of the submersible pump 2 is within a reasonable range, the submersible pump 2 is not blocked, and the water in the pool can be continuously pumped out by the submersible pump 2; when the pressure difference detected by the differential pressure transmitter 3 exceeds the preset range of pressure difference, it means that the pressure difference at both ends of the submersible pump 2 exceeds the reasonable range, and the submersible pump 2 has a certain degree of blockage. The first end of the switching valve 4 can be connected with the third end of the switching valve 4 so that the water pumped out of the submersible pump 2 can be mixed with the water in the pool again, and the residual sediment in the pool can be mixed with the water in the pool to prevent the residual sediment from aggregating, thereby preventing the submersible pump 2 from being blocked, reducing the pressure difference at both ends of the submersible pump 2, and improving the submersible pump 2 to extract the remaining water at the bottom of the pool.

[0039] In an optional embodiment, one end of the pipe 1 close to the water inlet side of the submersible pump 2 is located at the bottom of the pool, which can help the submersible pump 2 to pump out as much water as possible from the pool and increase the pumping effect.

[0040] In an optional embodiment, the high-pressure port of the differential pressure transmitter 3 is arranged at the water outlet side of the submersible pump 2, and the low-pressure port of the differential pressure transmitter 3 is arranged at the water inlet side of the submersible pump 2. The differential pressure transmitter 3 can generate a correct pressure difference result and prevent the generation of a reverse result or an erroneous result.

[0041] In an optional embodiment, a filter screen 5 is provided in the pipeline 1, and the filter screen 5 is located at the water inlet side of the submersible pump 2. The filter screen 5 can filter the water entering the water inlet side of the submersible pump 2.

[0042] In an optional implementation, the filter screen 5 is located between the low-pressure port of the differential pressure transmitter 3 and the water inlet side of the submersible pump 2 .

[0043] In an optional embodiment, a cutter 6 is provided in the pipeline 1, and the cutter 6 is located on a side of the filter screen 5 away from the submersible pump 2. The cutter 6 is connected to the controller, and the controller controls the submersible pump 2 and the cutter 6 to operate synchronously. The cutter 6 can break foreign matter entering the water inlet side of the submersible pump 2 in advance to protect the smooth flow of the entire pipeline 1.

[0044] In an optional implementation, the low-pressure port of the differential pressure transmitter 3 is located between the cutter 6 and the filter 5 .

[0045] In an optional embodiment, a warning water level is set in the controller, and when the water level in the pool is lower than the warning water level, the controller controls the differential pressure transmitter 3 to start working. The controller compares the water level in the pool detected by the liquid level sensor with the warning water level to determine whether the water level in the pool is lower than the warning water level.

[0046] When the water in the pool reaches the warning water level, it indicates that the water level in the pool has decreased, and it is necessary to start detecting the pressure difference at both ends of the submersible pump 2 through the differential pressure transmitter 3 .

[0047] In an optional embodiment, a safety water level is also provided in the controller. When the water level in the pool is lower than the safety water level, the controller controls the submersible pump 2 to stop working; the controller compares the water level in the pool detected by the liquid level sensor with the safety water level to determine whether the water level in the pool is lower than the safety water level.

[0048] The safe water level is lower than the warning water level.

[0049] The safety water level can be set at the bottom of the pool. When the water level in the pool is lower than the safety water level, the submersible pump 2 may no longer be able to continue pumping water from the pool. At this time, the submersible pump 2 can be stopped to prevent the submersible pump 2 from idling and heating, thereby protecting the submersible pump 2.

[0050] In an optional embodiment, a differential pressure warning value is also provided in the controller, and when the differential pressure detected by the differential pressure transmitter 3 is greater than the differential pressure warning value, the controller controls the submersible pump 2 to stop working. The differential pressure warning value should be greater than the preset differential pressure range.

[0051] When the pressure difference detected by the differential pressure transmitter 3 is greater than the pressure difference warning value, it means that the pressure difference at both ends of the submersible pump 2 is too large, and a serious blockage problem may occur. It is necessary to stop the operation of the submersible pump 2 in time, sound an alarm, and clean it manually.

[0052] The controller can also set an overflowing water level, which may correspond to the position of the top of the pool. When the water level in the pool is higher than the overflowing water level, it indicates that the water in the pool is overflowing, and the controller can control the submersible pump 2 to start working.

[0053] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A submersible pump automatic control system for draining a pool, characterized in that: include: A pipeline (1) is arranged in the water pool and a submersible pump (2) is arranged inside the pipeline; A differential pressure transmitter (3), wherein the high-pressure port and the low-pressure port of the differential pressure transmitter (3) are both arranged inside the pipeline (1) and are respectively located at two ends of the submersible pump (2), and are suitable for detecting the pressure difference between the water inlet side and the water outlet side of the submersible pump (2); a switching valve (4), wherein a first end of the switching valve (4) is connected to an end of the pipeline (1) close to the water outlet side of the submersible pump (2), a second end of the switching valve (4) is connected to the outside of the pool, and a third end of the switching valve (4) is connected to the inside of the pool; A liquid level sensor, disposed in the water pool and adapted to detect the water level in the water pool; A controller, wherein the differential pressure transmitter (3), the switching valve (4), the submersible pump (2) and the liquid level sensor are respectively connected to the controller, and a preset pressure difference range is set in the controller; When in operation, the controller controls the submersible pump (2) to start, and when the pressure difference detected by the differential pressure transmitter (3) is within a preset pressure difference range, the controller controls the first end of the switching valve (4) to be connected to the second end of the switching valve (4); when the pressure difference detected by the differential pressure transmitter (3) exceeds the preset pressure difference range, the controller controls the first end of the switching valve (4) to be connected to the third end of the switching valve (4).

2. The submersible pump automatic control system according to claim 1, characterized in that: One end of the pipeline (1) close to the water inlet side of the submersible pump (2) is located at the bottom end of the pool.

3. The submersible pump automatic control system according to claim 1, characterized in that: The high-pressure port of the differential pressure transmitter (3) is arranged on the water outlet side of the submersible pump (2), and the low-pressure port of the differential pressure transmitter (3) is arranged on the water inlet side of the submersible pump (2).

4. The submersible pump automatic control system according to claim 1, characterized in that: A filter screen (5) is arranged in the pipeline (1), and the filter screen (5) is located on the water inlet side of the submersible pump (2).

5. The submersible pump automatic control system according to claim 4, characterized in that: The filter screen (5) is located between the low-pressure port of the differential pressure transmitter (3) and the water inlet side of the submersible pump (2).

6. The submersible pump automatic control system according to claim 4, characterized in that: A cutter (6) is arranged in the pipeline (1), and the cutter (6) is located on a side of the filter (5) away from the submersible pump (2). The cutter (6) is connected to the controller, and the controller controls the submersible pump (2) and the cutter (6) to operate synchronously.

7. The submersible pump automatic control system according to claim 6, characterized in that: The low-pressure port of the differential pressure transmitter (3) is located between the cutter (6) and the filter (5).

8. The submersible pump automatic control system according to claim 1, characterized in that: A warning water level is set in the controller. When the water level in the pool is lower than the warning water level, the controller controls the differential pressure transmitter (3) to start working.

9. The submersible pump automatic control system according to claim 8, characterized in that: A safety water level is also provided in the controller. When the water level in the pool is lower than the safety water level, the controller controls the submersible pump (2) to stop working. The safe water level is lower than the warning water level.

10. The submersible pump automatic control system according to claim 1, characterized in that: A pressure difference warning value is also provided in the controller. When the pressure difference detected by the differential pressure transmitter (3) is greater than the pressure difference warning value, the controller controls the submersible pump (2) to stop working.

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