Pump opening cleaning device for magnetic suspension vacuum pump and using method of pump opening cleaning device

Abstract

The invention belongs to the technical field of cleaning devices, and discloses a pump opening cleaning device for a magnetic suspension vacuum pump and a using method thereof.The pump opening cleaning device for the magnetic suspension vacuum pump comprises a variable-diameter pipeline, and the variable-diameter pipeline is provided with a large diameter and a small diameter; an annular spraying water pipe is arranged at the position, located at the large-diameter position, of the outer portion of the variable-diameter pipeline in a sleeving mode, a plurality of mist-shaped spraying heads are arranged at the position, located at the large-diameter position, in the variable-diameter pipeline, the annular spraying water pipe is communicated with the mist-shaped spraying heads, and the lower portion of the annular spraying water pipe is communicated with a filtering backflow pipeline. According to the magnetic suspension vacuum pump cleaning device, high-pressure spraying water can be conveyed to clean a pump opening of the magnetic suspension vacuum pump, the spraying water can be filtered for secondary use, and energy consumption is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of cleaning devices, and in particular, relates to a pump port cleaning device for a magnetic levitation vacuum pump and a use method thereof. Background Art

[0002] Currently, most existing turbine spray systems are manually controlled, with water and valves added on site, and the spraying is started and stopped manually based on experience. The overall degree of automation is low, which reduces the use effect.

[0003] In order to solve the above technical problems, an automatic cleaning device has also appeared on the market, with the patent application number: CN202323283988.0, which discloses a magnetic levitation vacuum pump inlet cleaning device, including: a high-pressure pump, used to generate a high-pressure liquid flow; a nozzle, connected to the high-pressure pump and used to spray high-pressure liquid flow to the impeller in the magnetic levitation vacuum pump, the nozzle is arranged at the inlet of the magnetic levitation vacuum pump; a first solenoid valve, arranged at the nozzle and used to control the opening and closing of the nozzle; a controller, which is connected to the high-pressure pump, the nozzle and the first solenoid valve signal, and the controller is used to control the opening and closing state of the high-pressure pump, the nozzle and the first solenoid valve.

[0004] The above-mentioned existing cleaning devices use high-pressure pumps to deliver high-pressure spray water and realize automatic spraying operations. However, the spray water of such existing cleaning devices is mostly disposable, which has waste problems and lacks automation. Impurities after spraying remain in the volute and are easily attached to the impeller for a second time. Summary of the invention

[0005] The main technical problem to be solved by the present invention is to provide a pump port cleaning device for a magnetic levitation vacuum pump and a method of using the device, which can deliver high-pressure spray water to clean the pump port of the magnetic levitation vacuum pump, and can filter the spray water for secondary use, thereby reducing energy consumption and avoiding impurities flushed down from remaining in the volute. The device also has a high overall degree of automation and improves the use effect.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A pump port cleaning device for a magnetic levitation vacuum pump comprises a variable diameter pipe, wherein the variable diameter pipe has a large diameter and a small diameter, an annular spray water pipe is sleeved at the large diameter position outside the variable diameter pipe, a plurality of mist spray heads are arranged at the large diameter position inside the variable diameter pipe, the annular spray water pipe is connected to the mist spray head, a filtering return pipeline is connected below the annular spray water pipe, and the other end of the filtering return pipeline is connected to the drain port of the upper volute of the magnetic levitation vacuum pump to be cleaned.

[0007] The following is a further optimization of the above technical solution by the present invention: The filter return pipe is connected with a filter, an electric water pump and a one-way valve in sequence along the flow direction of the return water. The electric water pump sucks the accumulated water in the volute through the filter return pipe and transports it to the annular spray water pipe through the one-way valve.

[0008] Further optimization: a plurality of spray branch pipes are connected in series to the annular spray water pipe, and one end of the spray branch pipe away from the annular spray water pipe is connected to the water inlet of the corresponding mist spray head.

[0009] Further optimization: the top of the annular spray water pipe is connected with a water inlet pipe, and the other end of the water inlet pipe is connected with an external water source; the water inlet pipe is connected in series with an electric valve for controlling the on-off of the water inlet pipe.

[0010] Further optimization: A speed sensor is installed on the variable diameter pipe, the detection end of the speed sensor is located on the inner side of the variable diameter pipe, and the speed sensor is used to detect the speed information and shutdown information of the magnetic levitation vacuum pump.

[0011] Further optimization: the output end of the speed sensor is communicatively connected to the CPU control module, and the speed sensor detects and obtains the real-time speed signal of the magnetic levitation vacuum pump and sends it to the CPU control module; The output end of the CPU control module is electrically connected to the control end of the electric valve and the electric water pump, and the CPU control module sends a control signal to control the electric valve and the electric water pump to work;.

[0012] Further optimization: The CPU control module is provided with a maximum spray speed preset threshold and a minimum spray speed preset threshold. After the real-time speed of the magnetic levitation vacuum pump detected by the speed sensor is sent to the CPU control module, the CPU control module compares the real-time speed with the maximum spray speed preset threshold and the minimum spray speed preset threshold.

[0013] Further optimization: the output end and the input end of the CPU control module are bidirectionally electrically connected with a timing module, and the timing module is used to time the spraying working time and the spraying stopping time; The CPU control module is also provided with a spray stop time preset threshold and a spray working time preset threshold.

[0014] The present invention also provides a method for cleaning the pump port of a magnetic levitation vacuum pump. Based on the above-mentioned pump port cleaning device for a magnetic levitation vacuum pump, the method of use is divided into two working conditions. Working condition 1 is: the operating speed of the magnetic levitation vacuum pump is greater than the preset threshold value of the maximum spray speed; and the method of use includes the following steps: S1. When the magnetic levitation vacuum pump is working normally, the pump port cleaning device does not work; S2. When the magnetic levitation vacuum pump stops working, the speed of the magnetic levitation vacuum pump slowly decreases. At this time, the CPU control module controls the speed sensor to work. The speed sensor is used to detect the speed of the magnetic levitation vacuum pump and obtain a real-time speed signal to send to the CPU control module; S3, the CPU control module compares the real-time rotation speed with the maximum spray speed preset threshold and the minimum spray speed preset threshold; When the real-time rotation speed is greater than the preset threshold of the maximum spray speed, the CPU control module controls the electric valve and the electric water pump to stop working; When the real-time rotation speed is less than the preset threshold of the maximum spray speed and greater than the preset threshold of the minimum spray speed, the CPU control module controls the electric valve and the electric water pump to start and perform the spraying operation; When the real-time rotation speed is less than the preset threshold value of the minimum spray speed, the CPU control module controls the electric valve and the electric water pump to stop working.

[0015] Further optimization: Working condition 2 is: the running speed of the magnetic levitation vacuum pump is less than the preset threshold of the maximum spray speed, and the use method includes the following steps: J1. The magnetic levitation vacuum pump starts and starts working. The CPU control module controls the speed sensor to work. The speed sensor is used to detect the speed of the magnetic levitation vacuum pump and obtain a real-time speed signal to send to the CPU control module. When the speed detected in the first detection cycle is less than the preset threshold of the maximum spray speed, the CPU control module receives the speed information and starts the timing module to start the timing function. J2, the CPU control module controls the electric valve and the electric water pump to start and perform the first spraying operation; at this time, the timing module is used to time the spraying operation. When the timing of the spraying operation is equal to the preset threshold of the spraying operation time, the CPU control module controls the electric valve and the electric water pump to stop working; J3, the CPU control module controls the timing module to start timing the spray stop time. When the spray stop time is equal to the preset threshold of the spray stop time, the CPU control module controls the electric valve and the electric water pump to start and perform the next spraying operation; repeat steps J2 and J3 to fully clean the impeller and pump port of the magnetic levitation vacuum pump.

[0016] The present invention adopts the above technical solution and has the following beneficial effects: 1. The present invention can improve the use conditions of the magnetic levitation vacuum pump in harsh working conditions, keep the impeller and the pump port clean, and can promptly remove impurities inside the volute, thereby improving the stability of the equipment and extending the life of the equipment; and adopts a circulating spraying method to circulate the spray water, with a high overall degree of automation, reducing the labor intensity of workers, improving the use effect, and being able to make full use of the spray water, reduce energy consumption, and save water.

[0017] In the present invention, the speed sensor, the timing module and the CPU control module are used in combination to collect the speed information, the shutdown information and the time information of the magnetic levitation vacuum pump, and transmit the information back to the CPU control module, so as to control the opening and closing of the electric valve. When the speed of the magnetic levitation vacuum pump reaches the set spraying speed or detects the shutdown signal, or after a fixed time interval, the spraying will automatically start, and will automatically close after spraying for a set period of time. The whole system can be used by connecting to an ordinary tap water system, and the filter needs to be cleaned regularly to avoid clogging.

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 A schematic diagram of the overall structure in an embodiment of the present invention when in use; Figure 3 Schematic diagram of a control system in an embodiment of the present invention.

[0020] In the figure: 1-electric valve; 2-annular spray water pipe; 201-spray branch pipe; 202-water inlet pipe; 3-mist spray head; 4-check valve; 5-electric water pump; 6-filter; 7-speed sensor; 8-variable pipe; 9-filter return pipe. DETAILED DESCRIPTION

[0021] like Figure 1-3 As shown: a pump port cleaning device for a magnetic levitation vacuum pump, comprising a variable diameter pipe 8, wherein the variable diameter pipe 8 has a large diameter and a small diameter, an annular spray water pipe 2 is sleeved on the outside of the variable diameter pipe 8 at the large diameter position, a plurality of mist spray heads 3 are arranged at the large diameter position in the variable diameter pipe 8, the annular spray water pipe 2 is connected to the mist spray head 3, a filtering return pipeline is connected below the annular spray water pipe 2, and the other end of the filtering return pipeline is connected to the drain outlet of the upper volute of the magnetic levitation vacuum pump to be cleaned.

[0022] In this embodiment, the number of the mist spray heads 3 is four, and the four mist spray heads 3 are ring-shaped and arranged at intervals.

[0023] The annular spray water pipe 2 is serially connected with a plurality of spray branch pipes 201 , and one end of the spray branch pipe 201 away from the annular spray water pipe 2 is connected to the water inlet of the corresponding mist spray head 3 .

[0024] The top of the annular spray water pipe 2 is connected with a water inlet pipe 202, and the other end of the water inlet pipe 202 is connected with an external water source.

[0025] The water inlet pipe 202 is connected in series with an electric valve 1 , and the electric valve 1 is used to control the on-off of the water inlet pipe 202 .

[0026] When in use, first install the reducer pipe 8 at the air inlet of the magnetic levitation vacuum pump to be cleaned. At this time, the small-diameter end of the reducer pipe 8 is connected to the air inlet of the magnetic levitation vacuum pump, completing the assembly and installation.

[0027] When spraying is required to clean the impeller and pump port in the magnetic levitation vacuum pump, the electric valve 1 is first opened. At this time, the electric valve 1 is opened to allow the external water source to enter the annular spray water pipe 2 through the water inlet pipe 202, and then the water source is passed into the corresponding mist spray head 3 through multiple spray branch pipes 201. At this time, the mist spray head 3 sprays high-pressure water mist to clean the impeller and pump port in the magnetic levitation vacuum pump, which is convenient to use.

[0028] The filtering reflux pipeline includes a filtering reflux pipe 9 , the water inlet of the filtering reflux pipe 9 is connected to the drain outlet of the upper volute of the magnetic levitation vacuum pump to be cleaned, and the water outlet of the filtering reflux pipe 9 is connected to the annular spray water pipe 2 .

[0029] The filter return pipe 9 is connected with a filter 6, an electric water pump 5 and a one-way valve 4 in sequence along the flow direction of the return water.

[0030] The one-way valve 4 is arranged on the filter return pipe 9 and close to the position of the annular spray water pipe 2. The one-way valve 4 conducts unidirectional flow of water in the filter return pipe 9 to prevent the water in the annular spray water pipe 2 from flowing back into the volute on the magnetic levitation vacuum pump through the filter return pipe 9.

[0031] The electric water pump 5 works by sucking the accumulated water in the volute through the filter return pipe 9 and transporting it to the annular spray water pipe 2 through the one-way valve 4.

[0032] With this design, the electric water pump 5 works by sucking the accumulated water in the volute through the filter return pipe 9 and transporting it to the annular spray water pipe 2 through the one-way valve 4 after pressurization, so as to realize the recycling of spray water, thereby reducing the use of spray water and improving the use effect.

[0033] The filter 6 is used to filter the reflux water flowing in the filter reflux pipe 9 to prevent impurities in the reflux water from flowing back into the volute again, thereby improving the use effect.

[0034] A rotation speed sensor 7 is installed on the variable diameter pipe 8 , the detection end of the rotation speed sensor 7 is located on the inner side of the variable diameter pipe 8 , and the rotation speed sensor 7 is used to detect the rotation speed information and shutdown information of the magnetic suspension vacuum pump.

[0035] The output end of the rotation speed sensor 7 is communicatively connected to the CPU control module, and the rotation speed sensor 7 detects and obtains a real-time rotation speed signal of the magnetic suspension vacuum pump and sends it to the CPU control module.

[0036] The output end of the CPU control module is electrically connected to the control ends of the electric valve 1 and the electric water pump 5 , and the CPU control module sends a control signal to control the electric valve 1 and the electric water pump 5 to work.

[0037] The output end and the input end of the CPU control module are bidirectionally electrically connected with a timing module, and the timing module is used to time the spraying working time and the spraying stopping time.

[0038] The CPU control module is provided with a maximum spray speed preset threshold and a minimum spray speed preset threshold. After the real-time speed of the magnetic levitation vacuum pump detected by the speed sensor 7 is sent to the CPU control module, the CPU control module compares the real-time speed with the maximum spray speed preset threshold and the minimum spray speed preset threshold.

[0039] When the real-time rotation speed is greater than the preset threshold value of the maximum spray speed, the CPU control module controls the electric valve 1 and the electric water pump 5 to stop working.

[0040] When the real-time rotation speed is less than the maximum spray speed preset threshold and greater than the minimum spray speed preset threshold, the CPU control module controls the electric valve 1 to open and controls the electric water pump 5 to start.

[0041] At this time, the external water source enters the annular spray water pipe 2 through the water inlet pipe 202, and then passes the water source into the corresponding mist spray head 3 through multiple spray branches 201. At this time, the mist spray head 3 sprays high-pressure water mist to clean the impeller and pump port in the magnetic levitation vacuum pump.

[0042] The electric water pump 5 sucks the accumulated water in the volute through the filter return pipe 9 and transports it to the annular spray water pipe 2 through the one-way valve 4 after pressurization, so as to realize the recycling of spray water, thereby reducing the use of spray water and improving the use effect.

[0043] The filter 6 is used to filter the reflux water flowing in the filter reflux pipe 9 to prevent impurities in the reflux water from flowing back into the volute again, thereby improving the use effect.

[0044] When the real-time rotation speed is less than the preset threshold value of the minimum spray speed, the CPU control module controls the electric valve 1 and the electric water pump 5 to stop working.

[0045] The CPU control module is also provided with a spray stop time preset threshold and a spray working time preset threshold.

[0046] The CPU control module controls the electric valve 1 and the electric water pump 5 to start the spraying operation. At this time, the timing module is used to time the spraying operation. When the timing of the spraying operation is equal to the preset threshold of the spraying operation time, the CPU control module controls the electric valve 1 and the electric water pump 5 to stop working.

[0047] The timing module is also used to time the spray stop time after the last spraying is finished. When the spray stop time is equal to the preset spray stop time threshold, the CPU control module controls the electric valve 1 and the electric water pump 5 to start and perform the spraying operation.

[0048] The present invention also provides a method for cleaning the pump port of a magnetic levitation vacuum pump. Based on the above-mentioned pump port cleaning device for a magnetic levitation vacuum pump, the method of use is divided into two working conditions. Working condition one is: the operating speed of the magnetic levitation vacuum pump is greater than the preset threshold value of the maximum spray speed; working condition two is: the operating speed of the magnetic levitation vacuum pump is less than the preset threshold value of the maximum spray speed.

[0049] In this embodiment, the preset threshold value of the maximum spray speed is 15000 rpm; the preset threshold value of the minimum spray speed is 5000 rpm.

[0050] In working condition 1, when the running speed of the magnetic levitation vacuum pump is greater than the preset threshold of the maximum spraying speed, the use method includes the following steps: S1. When the magnetic levitation vacuum pump works normally, the pump port cleaning device does not work.

[0051] S2. When the magnetic levitation vacuum pump stops working, the speed of the magnetic levitation vacuum pump slowly decreases. At this time, the CPU control module controls the speed sensor 7 to work. At this time, the speed sensor 7 is used to detect the speed of the magnetic levitation vacuum pump and obtain a real-time speed signal to send to the CPU control module.

[0052] S3, the CPU control module compares the real-time rotation speed with the maximum spray speed preset threshold and the minimum spray speed preset threshold; When the real-time rotation speed is greater than the preset threshold value of the maximum spray speed, the CPU control module controls the electric valve 1 and the electric water pump 5 to stop working; When the real-time rotation speed is less than the preset threshold of the maximum spray speed and greater than the preset threshold of the minimum spray speed, the CPU control module controls the electric valve 1 and the electric water pump 5 to start and perform the spraying operation; When the real-time rotation speed is less than the preset threshold value of the minimum spray speed, the CPU control module controls the electric valve 1 and the electric water pump 5 to stop working.

[0053] In step S3, the specific working process of the spraying operation is: the external water source enters the annular spray water pipe 2 through the water inlet pipe 202, and then the water source is passed into the corresponding mist spray head 3 through multiple spray branches 201. At this time, the mist spray head 3 sprays high-pressure water mist to clean the impeller and pump port in the magnetic levitation vacuum pump.

[0054] The electric water pump 5 works by sucking the accumulated water in the volute through the filter return pipe 9 and transporting it to the annular spray water pipe 2 through the one-way valve 4 after pressurization, so as to realize the recycling of the spray water. The filter 6 is used to filter the return water flowing in the filter return pipe 9 to prevent impurities in the return water from flowing back into the volute again, thereby improving the use effect.

[0055] In step S3, the electric valve 1 is a switch valve, and the working state of the electric valve 1 is fully open or fully closed.

[0056] Working condition 2: When the running speed of the magnetic levitation vacuum pump is less than the preset threshold of the maximum spraying speed, the use method includes the following steps: J1. The magnetic levitation vacuum pump starts and begins to work. At this time, the CPU control module controls the speed sensor 7 to work. The speed sensor 7 is used to detect the speed of the magnetic levitation vacuum pump and obtain a real-time speed signal to send to the CPU control module; when the speed detected in the first detection cycle is less than the preset threshold value of the maximum spray speed (15000rpm), the CPU control module receives the speed information and starts the timing module to start the timing function.

[0057] J2, the CPU control module controls the electric valve 1 and the electric water pump 5 to start, and perform the first spraying operation; at this time, the timing module is used to time the spraying operation. When the timing of the spraying operation is equal to the preset threshold of the spraying operation time, the CPU control module controls the electric valve 1 and the electric water pump 5 to stop working.

[0058] J3. The CPU control module controls the timing module to start timing the spray stop time. When the spray stop time is equal to the preset threshold of the spray stop time, the CPU control module controls the electric valve 1 and the electric water pump 5 to start and perform the next spraying operation.

[0059] In step J2, the preset threshold value of the spraying working time is 20 seconds; and in step J3, the preset threshold value of the spraying stopping time is 12 hours.

[0060] Repeat steps J2 and J3 to fully clean the impeller and pump port of the magnetic levitation vacuum pump.

[0061] For those skilled in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the protection scope of the present invention.

Claims

1. A pump port cleaning device for a magnetic levitation vacuum pump, comprising a variable diameter pipe (8), wherein the variable diameter pipe (8) has a large diameter and a small diameter, and is characterized in that: An annular spray water pipe (2) is sleeved on the outside of the variable diameter pipe (8) at the large diameter position, and a plurality of mist spray heads (3) are arranged inside the variable diameter pipe (8) at the large diameter position. The annular spray water pipe (2) is connected to the mist spray heads (3), and a filter return pipeline is connected below the annular spray water pipe (2). The other end of the filter return pipeline is connected to the drain outlet of the upper volute of the magnetic suspension vacuum pump to be cleaned.

2. A pump port cleaning device for a magnetic levitation vacuum pump according to claim 1, characterized in that: The filter return pipe (9) is connected in sequence to a filter (6), an electric water pump (5) and a one-way valve (4) along the flow direction of the return water. The electric water pump (5) works to suck the accumulated water in the volute through the filter return pipe (9) and transport it to the annular spray water pipe (2) through the one-way valve (4).

3. A pump port cleaning device for a magnetic levitation vacuum pump according to claim 2, characterized in that: The annular spray water pipe (2) is serially connected with a plurality of spray branch pipes (201), and one end of the spray branch pipe (201) away from the annular spray water pipe (2) is connected to the water inlet of the corresponding mist spray head (3).

4. A pump port cleaning device for a magnetic levitation vacuum pump according to claim 3, characterized in that: The annular spray water pipe (2) is connected to a water inlet pipe (202) at its top, and the other end of the water inlet pipe (202) is connected to an external water source; the water inlet pipe (202) is serially connected to an electric valve (1) for controlling the on / off of the water inlet pipe (202).

5. A pump port cleaning device for a magnetic levitation vacuum pump according to claim 4, characterized in that: A rotation speed sensor (7) is installed on the variable diameter pipe (8), a detection end of the rotation speed sensor (7) is located on the inner side of the variable diameter pipe (8), and the rotation speed sensor (7) is used to detect rotation speed information and shutdown information of the magnetic suspension vacuum pump.

6. A pump port cleaning device for a magnetic levitation vacuum pump according to claim 5, characterized in that: The output end of the rotation speed sensor (7) is communicatively connected to a CPU control module, and the rotation speed sensor (7) detects and obtains a real-time rotation speed signal of the magnetic suspension vacuum pump and sends it to the CPU control module; The output end of the CPU control module is electrically connected to the control ends of the electric valve (1) and the electric water pump (5), and the CPU control module sends a control signal for controlling the electric valve (1) and the electric water pump (5) to operate; 7. A pump port cleaning device for a magnetic levitation vacuum pump according to claim 6, characterized in that: The CPU control module is provided with a maximum spray speed preset threshold value and a minimum spray speed preset threshold value. After the real-time rotation speed of the magnetic levitation vacuum pump detected by the rotation speed sensor (7) is sent to the CPU control module, the CPU control module compares the real-time rotation speed with the maximum spray speed preset threshold value and the minimum spray speed preset threshold value.

8. The pump port cleaning device for a magnetic levitation vacuum pump according to claim 7, characterized in that: The output end and the input end of the CPU control module are bidirectionally electrically connected to a timing module, and the timing module is used to time the spraying working time and the spraying stopping time; The CPU control module is also provided with a spray stop time preset threshold and a spray working time preset threshold.

9. A method for cleaning the pump port of a magnetic levitation vacuum pump, characterized in that: Based on the pump port cleaning device for a magnetic levitation vacuum pump as described in claim 8, the use method is divided into two working conditions, working condition 1 is: the operating speed of the magnetic levitation vacuum pump is greater than the preset threshold of the maximum spray speed, and the use method includes the following steps: S1. When the magnetic levitation vacuum pump is working normally, the pump port cleaning device does not work; S2, when the magnetic levitation vacuum pump stops working, the speed of the magnetic levitation vacuum pump gradually decreases, and at this time the CPU control module controls the speed sensor (7) to work, and the speed sensor (7) is used to detect the speed of the magnetic levitation vacuum pump and obtain a real-time speed signal to send to the CPU control module; S3, the CPU control module compares the real-time rotation speed with the maximum spray speed preset threshold and the minimum spray speed preset threshold; When the real-time rotation speed is greater than a preset threshold value of the maximum spray speed, the CPU control module controls the electric valve (1) and the electric water pump (5) to stop working; When the real-time rotation speed is less than a preset threshold value of the maximum spray speed and greater than a preset threshold value of the minimum spray speed, the CPU control module controls the electric valve (1) and the electric water pump (5) to start and perform spraying; When the real-time rotation speed is less than the preset threshold value of the minimum spray speed, the CPU control module controls the electric valve (1) and the electric water pump (5) to stop working.

10. A method for cleaning a pump port of a magnetic levitation vacuum pump according to claim 9, characterized in that: Working condition 2: The running speed of the magnetic levitation vacuum pump is less than the preset threshold of the maximum spraying speed. The use method includes the following steps: J1, the magnetic levitation vacuum pump starts and begins to work, the CPU control module controls the speed sensor (7) to work, the speed sensor (7) is used to detect the speed of the magnetic levitation vacuum pump and obtain a real-time speed signal and send it to the CPU control module; when the speed detected in the first detection cycle is less than the preset threshold value of the maximum spray speed, the CPU control module receives the speed information and starts the timing module to start the timing function; J2, the CPU control module controls the electric valve (1) and the electric water pump (5) to start and perform the first spraying operation; at this time, the timing module is used to time the spraying operation, and when the timing of the spraying operation is equal to a preset threshold of the spraying operation time, the CPU control module controls the electric valve (1) and the electric water pump (5) to stop working; J3, the CPU control module controls the timing module to start timing the spray stop time. When the spray stop time is equal to the preset spray stop time threshold, the CPU control module controls the electric valve (1) and the electric water pump (5) to start and perform the next spraying operation. Repeat steps J2 and J3 to fully clean the impeller and pump port of the magnetic levitation vacuum pump.

Images