Online cleaning device and method for vacuum pump liquid level meter guide pipe

Abstract

The invention relates to the technical field of vacuum pumps, and discloses a vacuum pump liquid level meter guide pipe online cleaning device and method.The vacuum pump liquid level meter guide pipe online cleaning device comprises a cleaning pipe, a cleaning device is arranged in the cleaning pipe, a water outlet pipe is fixedly connected to the upper portion of the outer arc face of the cleaning pipe, and a pressure gauge is fixedly connected to the outer arc face of the water outlet pipe; a first valve is fixedly connected to the outer arc face of the water outlet pipe, and a water inlet pipe is fixedly connected to the lower portion of the outer arc face of the cleaning pipe. According to the online cleaning device, the online cleaning device comprising the cleaning pipe, the scraping plate, the screw rod and other assemblies is designed, and specific cleaning steps are matched, so that online cleaning of the vacuum pump liquid level meter guide pipe is achieved. The cleaning work can be completed without stopping the pump, the problem that in the prior art, the pump must be stopped for cleaning is solved, the influence of frequent pump stopping and pump reversing on stable operation of equipment is avoided, production interruption caused by equipment faults is reduced, production continuity and stability are guaranteed, and meanwhile the labor intensity of workers is lowered.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vacuum pumps, in particular to an online cleaning device and method for a vacuum pump liquid level meter guide tube. BACKGROUND

[0002] In the industrial production process, the separation tank of the vacuum pump is the key equipment for realizing the gas-liquid separation of acid gas. After the acid gas enters the separation tank, the gas phase is discharged through the outlet pipe, the liquid phase forms a vacuum condensate, part of which is discharged from the bottom blowdown pipe, and part of which enters the vacuum pump body as working liquid to participate in the circulation. The remote liquid level meter is connected to the separation tank through a guide tube and is used for real-time monitoring of the liquid level in the tank, providing important data support for the stable operation of the vacuum pump.

[0003] In the prior art, the remote liquid level meter guide tube is directly connected to the separation tank, and the liquid level measurement is realized through the medium conduction in the guide tube. When the impurities in the acid gas accumulate in the guide tube and cause blockage, the guide tube needs to be cleaned to restore the accuracy of the liquid level meter. During cleaning, the vacuum pump needs to be stopped first, the connection between the equipment and the production system needs to be disconnected, and then the guide tube or the liquid level meter needs to be disassembled for manual dredging. After cleaning is completed, the vacuum pump is reassembled and started to restore the production process.

[0004] However, in the prior art, the cleaning of the liquid level meter guide tube must be carried out in the pump stopped state. Since the guide tube will be blocked by impurities accumulation in about 2 months, frequent pump stopping not only increases the cleaning workload of employees, but also affects the stable operation of the vacuum pump due to repeated pump reversal, and even causes damage to the pump body due to liquid level distortion, which seriously affects the continuity and stability of production. In view of this, we propose an online cleaning device and method for a vacuum pump liquid level meter guide tube. SUMMARY

[0005] In view of the shortcomings of the prior art, the present application provides an online cleaning device and method for a vacuum pump liquid level meter guide tube, which solves the problem of frequent pump stopping in the prior art, which not only increases the cleaning workload of employees, but also affects the stable operation of the vacuum pump due to repeated pump reversal.

[0006] To achieve the above purpose, the present application realizes the following technical scheme: an online cleaning device for a vacuum pump liquid level meter guide tube, comprising a cleaning pipe, wherein the inside of the cleaning pipe is provided with a cleaning device, the outer arc surface of the upper part of the cleaning pipe is fixedly connected with a water outlet pipe, the outer arc surface of the water outlet pipe is fixedly connected with a pressure gauge, the outer arc surface of the water outlet pipe is fixedly connected with a valve one, the outer arc surface of the lower part of the cleaning pipe is fixedly connected with a water inlet pipe, the outer arc surface of the water inlet pipe is fixedly connected with a valve two, the left end of the cleaning pipe is fixedly connected with a flange, and the right side of the cleaning pipe is fixedly connected with a blind plate. The cleaning device comprises a handle, a screw rod is fixedly connected to the left side of the handle, a nut is threadedly connected to the outer arc surface of the screw rod, the outer surface of the nut is fixedly connected with the cleaning pipe, a circular baffle is fixedly connected to the end of the screw rod away from the handle, and a scraper is fixedly connected to the right side of the circular baffle.

[0007] Preferably, through holes are formed in the upper and lower parts of the outer arc surface of the cleaning pipe, a hexagonal hole is formed in the right end of the cleaning pipe, a hexagonal through hole is formed in the inner surface of the blind plate, the blind plate is fixedly connected with the nut, the pressure gauge probe is located inside the water outlet pipe, the water outlet pipe is connected with the cleaning pipe, the water inlet pipe is connected with the cleaning pipe, the scraper is provided in multiple groups, and the multiple groups of scrapers are distributed in a circular baffle center circular array around the center of the circular baffle.

[0008] Preferably, a valve three is fixedly connected to the left side of the cleaning pipe through a flange, and a remote liquid level meter guide pipe is connected to the end of the valve three away from the cleaning pipe.

[0009] The vacuum pump liquid level meter guide pipe online cleaning method comprises the following steps: S1: device docking, removing the remote liquid level meter, and docking and fixing the cleaning device with the valve three of the remote liquid level meter guide pipe; the cleaning device comprises a cleaning pipe, a flange, a blind plate, a nut, a screw rod, a handle, a circular baffle, and a scraper, the cleaning pipe is provided with a flange and a blind plate at both ends, the blind plate is provided with a nut in the middle, the screw rod is matched with the nut, one end of the screw rod is located outside the cleaning pipe and provided with a handle, and the other end is located inside the cleaning pipe and provided with a circular baffle and a scraper; S2: pressure presetting, after S1 is completed, closing the valve one on the water outlet pipe of the cleaning device, opening the valve two on the water inlet pipe, adjusting the pressure to make the pressure gauge in the cleaning device display a pressure P2≥0.1MPa, and ensuring that P2>P1 of the separation tank; S3: guide pipe conduction, after S2 is completed, slowly opening the valve three, and adjusting the valve two to maintain the pressure gauge display P2≥0.1MPa until the valve three is completely opened; S4: scraping and washing propulsion, after S3 is completed, rotating the handle to make the scraper rotate with the screw rod and advance into the remote liquid level meter guide pipe, the scraper peels off the blockages on the inner wall of the remote liquid level meter guide pipe, the soft water flows to the remote liquid level meter guide pipe through the gap between the circular baffle and the cleaning pipe and the gap between the scrapers, and the peeled blockages are washed away, and the process maintains the normal pressure P2 displayed by the pressure gauge; S5: reset and pressure relief, after the scraper advances to the end of the remote liquid level meter guide pipe in S4, reversely rotating the handle to make the scraper retreat to the front of the valve three, and then closing the valve three; closing the valve two, opening the valve one, and after the pressure displayed by the pressure gauge in the cleaning device is reduced to 0, disassembling the cleaning device and reinstalling the remote liquid level meter.

[0010] Preferably, the scraper in S1 is composed of three small round steels with diameters of 8-10 mm, the angle between each small round steel is 120°, the end of the small round steel away from the circular baffle is provided with an arc-shaped chamfer, and the material of the small round steel is wear-resistant and corrosion-resistant stainless steel.

[0011] Preferably, the diameter of the circular baffle in S1 is 0.5-1 cm smaller than the diameter of the cleaning pipe, the distance between the circular baffle and the scraper is 5-8 cm, the thickness of the circular baffle is 3-5 mm, and the circular baffle is uniformly provided with three through holes with diameters of 1-2 cm.

[0012] Preferably, the connection mode of the cleaning pipe with the flange and the blind plate in S1 is continuous welding, double-sided welding is adopted at the welding position, the welding leg height is 1-1.5 times the wall thickness of the cleaning pipe, and water pressure test needs to be performed after welding, the test pressure is 0.5 MPa, and the pressure is maintained for 30 minutes without leakage.

[0013] Preferably, the self-adaptive adjustment algorithm of the pressure preset in S2 adjusts the opening degree of the second valve based on a preset pressure difference value rule by real-time acquisition of P1 and P2, so that P2 is stabilized in a target range and meets P2≥0.1 MPa, the adjustment range of the pressure gauge for displaying P2 in S2 is 0.1-0.3 MPa, the accuracy level of the pressure gauge is 0.4, and the range is 0-0.6 MPa.

[0014] Preferably, when the pressure gauge displays P2≥0.1 MPa in S3, the pressure value is monitored in real time through the pressure gauge on the cleaning device, and the pressure data is recorded every 5 seconds.

[0015] Preferably, the pushing length of the scraper to the end of the remote liquid level meter guide pipe is determined by the pushing length of the screw rod, and the screw rod is provided with a length scale with an accuracy of 1 cm.

[0016] The present application provides a vacuum pump liquid level meter guide pipe online cleaning device and method. It has the following advantages: 1、The present application realizes the online cleaning of the vacuum pump liquid level meter guide pipe by designing an online cleaning device containing a cleaning pipe, a scraper, a screw rod and other components, and cooperating with specific cleaning steps. The cleaning work can be completed without stopping the pump, solving the problem of pump cleaning in the prior art, avoiding the influence of frequent pump stopping and pump reversing on the stable operation of the equipment, reducing the production interruption caused by equipment failure, ensuring the continuity and stability of production, and reducing the labor intensity of employees.

[0017] 2、The application can effectively peel off and flush away the blockage in the guide pipe by setting a circular baffle, a scraper and the like in the cleaning device, combining with soft water flushing and pressure self-adaptive adjustment algorithm. During the cleaning process, by maintaining P2>P1 and forming a water seal in the range of 0.1-0.3 MPa, the safety and reliability of operation are ensured, the safety hidden danger such as acid gas leakage is avoided, the safety of the cleaning operation is improved, and the cleaning effect is ensured, so that the liquid level meter can accurately reflect the liquid level and ensure the stable operation of the pump.

[0018] 3、The application optimizes the structural design of the cleaning device, such as using three wear-resistant and corrosion-resistant small round steels distributed at 120° as the scraper, and a specific gap between the circular baffle and the cleaning pipe, so as to improve the durability and cleaning efficiency of the device. The cleaning method is simple to operate and can be performed at any time without complex preliminary preparation, thereby shortening the cleaning time, reducing the interference with production, prolonging the blockage period of the guide pipe, reducing the cleaning frequency, and further ensuring the stable and smooth production. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective view of the application; Figure 2 is a schematic view of the cleaning pipe section of the application; Figure 3 is a schematic view of the connection state of the remote liquid level meter guide pipe and the cleaning pipe of the application; Figure 4 is a flow chart of the online cleaning method of the vacuum pump liquid level meter guide pipe.

[0020] 1, cleaning pipe; 2, cleaning device; 3, flange; 4, water outlet pipe; 5, valve one; 6, pressure gauge; 7, blind plate; 8, water inlet pipe; 9, valve two; 10, valve three; 11, remote liquid level meter guide pipe; 201, circular baffle; 202, scraper; 203, nut; 204, screw rod; 205, handle. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the application will be described clearly and completely in combination with the drawings in the description of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application. EMBODIMENT

[0022] Please refer to the drawings in the description of the application Figure 1 - the drawings Figure 3The embodiment of the present application provides a vacuum pump liquid level meter guide pipe online cleaning device, which comprises a cleaning pipe 1, a cleaning device 2 arranged in the cleaning pipe 1, a water outlet pipe 4 fixedly connected to the upper outer arc surface of the cleaning pipe 1, a pressure gauge 6 fixedly connected to the outer arc surface of the water outlet pipe 4, a valve one 5 fixedly connected to the outer arc surface of the water outlet pipe 4, a water inlet pipe 8 fixedly connected to the lower outer arc surface of the cleaning pipe 1, a valve two 9 fixedly connected to the outer arc surface of the water inlet pipe 8, a flange 3 fixedly connected to the left end of the cleaning pipe 1 and a blind plate 7 fixedly connected to the right side of the cleaning pipe 1. The cleaning device 2 comprises a handle 205, the left side of the handle 205 is fixedly connected with a screw rod 204, the outer arc surface of the screw rod 204 is threadedly connected with a nut 203, the outer surface of the nut 203 is fixedly connected with the cleaning pipe 1, the end of the screw rod 204 away from the handle 205 is fixedly connected with a circular baffle 201, and the right side of the circular baffle 201 is fixedly connected with a scraper 202.

[0023] The upper and lower outer arc surfaces of the cleaning pipe 1 are both provided with through holes, which are respectively connected with the water inlet pipe 8 and the water outlet pipe 4, the right end of the cleaning pipe 1 is provided with a hexagonal hole for accommodating the nut 203 in the hexagonal hole, the inner surface of the blind plate 7 is provided with a hexagonal through hole, the blind plate 7 is fixedly connected with the nut 203, the probe of the pressure gauge 6 is located in the water outlet pipe 4, the water outlet pipe 4 is connected with the cleaning pipe 1, the water inlet pipe 8 is connected with the cleaning pipe 1, the scraper 202 is provided in multiple groups and is arranged in a circular baffle 201 center circular array, the left side of the cleaning pipe 1 is fixedly connected with a valve three 10 through the flange 3, and the end of the valve three 10 away from the cleaning pipe 1 is connected with a remote liquid level meter guide pipe 11.

[0024] Please refer to the accompanying drawings Figure 4 The vacuum pump liquid level meter guide pipe online cleaning method comprises the following steps: S1: device docking, the remote liquid level meter is removed, the cleaning device 2 is docked and fixed with the valve three 10 of the remote liquid level meter guide pipe 11; the cleaning device 2 comprises a cleaning pipe 1, a flange 3, a blind plate 7, a nut 203, a screw rod 204, a handle 205, a circular baffle 201 and a scraper 202, the cleaning pipe 1 is respectively provided with the flange 3 and the blind plate 7 at both ends, the blind plate 7 is provided with the nut 203 in the middle, the screw rod 204 is matched with the nut 203, one end of the screw rod 204 is located outside the cleaning pipe 1 and is provided with the handle 205, and the other end of the screw rod 204 is located inside the cleaning pipe 1 and is provided with the circular baffle 201 and the scraper 202; The scraper 202 in S1 is composed of three small round steels with a diameter of 8-10 mm, the angle between each small round steel is 120°, the end of the small round steel away from the circular baffle 201 is provided with an arc-shaped chamfer, the material of the small round steel is wear-resistant and corrosion-resistant stainless steel, the diameter of the circular baffle 201 in S1 is smaller than the diameter of the cleaning pipe 1 by 0.5-1 cm, the distance between the circular baffle 201 and the scraper 202 is 5-8 cm, the thickness of the circular baffle 201 is 3-5 mm, the circular baffle 201 is uniformly provided with three through holes with a diameter of 1-2 cm, the connection mode of the cleaning pipe 1, the flange 3 and the blind plate 7 in S1 is continuous welding, double-sided welding is adopted at the welding position, the welding leg height is 1-1.5 times of the wall thickness of the cleaning pipe 1, and water pressure test needs to be carried out after welding, the test pressure is 0.5 MPa, and the pressure is maintained for 30 minutes without leakage; S2: pressure preset, after S1 is completed, the valve one 5 on the water outlet pipe 4 of the cleaning device 2 is closed, the valve two 9 on the water inlet pipe 8 is opened, the pressure is adjusted so that the pressure gauge 6 in the cleaning device 2 displays a pressure P2≥0.1 MPa, and it is ensured that P2>P1 of the separation tank; The self-adaptive adjustment algorithm of the pressure preset in S2 adjusts the opening of the valve two 9 by real-time collection of P1 and P2 based on the preset pressure difference value rule, so that P2 is stabilized in the target range and meets P2≥0.1 MPa, the adjustment range of P2 displayed by the pressure gauge 6 in S2 is 0.1-0.3 MPa, the accuracy level of the pressure gauge 6 is 0.4 level, and the range is 0-0.6 MPa, wherein the self-adaptive pressure adjustment algorithm is as follows: I. Data collection: set the sampling period as T (T=1s, used for real-time tracking of pressure change), at the nth sampling, the separation tank pressure P1(n) (P1(n) is the real-time pressure of the separation tank at the nth sampling, unit: MPa) is collected through the separation tank pressure gauge, and the pressure P2(n) (P2(n) is the real-time pressure of the cleaning device at the nth sampling, unit: MPa) in the cleaning device 2 is collected through the pressure gauge 6, wherein the accuracy level of the pressure gauge 6 is 0.4 level, the range is 0-0.6 MPa, and the measurement error is:

[0025] Therefore, the collected P2(n) needs to meet the deviation in the range from the true value, to provide a reliable data basis for subsequent adjustment; II. Target pressure calculation: first calculate the basic target pressure:

[0026] Wherein: ΔP0 is the preset minimum pressure difference, which is 0.05 MPa, to ensure that P2>P1, and then according to the "P2 adjustment range is 0.1-0.3 MPa" in S2, the boundary is limited to obtain the final target pressure P 2,target (n), that is: When P 2,target_base (n)<0.1MPa, P 2,target (n)=0.1MPa; When P 2,target_base (n)>0.3MPa, P 2,target (n)=0.3MPa; Otherwise, P 2,target (n)=P 2,target_base (n) This ensures that the target pressure meets P2>P1 and falls within the interval of 0.1-0.3MPa; III. Deviation adjustment: first calculate the pressure deviation:

[0027] Where: ΔP(n) is the difference between the actual pressure and the target pressure at the nth sampling, unit: MPa; Then adjust the opening of valve two (9) based on the deviation: When ΔP(n)<-0.0024MPa (i.e. P2 is lower than the target value and the deviation exceeds the measurement error), increase the opening of valve two (9), adjustment amount ΔV(n)=K p ×|ΔP(n)| (K p is the proportional coefficient, take 5% / 0.01MPa, i.e. every deviation of 0.01MPa, the opening is increased by 5% of the current opening); When ΔP(n)>0.0024MPa (i.e. P2 is higher than the target value and the deviation exceeds the measurement error), decrease the opening of valve two (9), adjustment amount ΔV(n)=K p ×ΔP(n) (the adjustment direction is opposite, the amplitude is calculated as above); When |ΔP(n)|≤0.00244MPa (the deviation is within the measurement error), keep the opening of valve two (9) unchanged, through this adjustment ensure that P2 is stable within the target range, provide stable pressure basis for "maintain P2≥0.1MPa when the guide tube is turned on" in S3; S3: Turn on the guide tube, after S2 is completed, slowly open valve three (10), at the same time adjust valve two (9) to maintain the pressure gauge 6 display P2≥0.1MPa, until valve three (10) is fully opened; When adjusting valve two (9) to maintain the pressure gauge 6 display P2≥0.1MPa in S3, real-time monitor the pressure value through the pressure gauge 6 on the cleaning device 2, record the pressure data every 5 seconds; S4: Scrape and push forward, after S3 is completed, rotate the handle 205, make the scraper 202 rotate with the screw rod 204 to push forward into the remote liquid level meter guide pipe 11, the scraper 202 peels off the blockage on the inner wall of the remote liquid level meter guide pipe 11, the softened water flows to the remote liquid level meter guide pipe 11 through the gap between the circular baffle 201 and the cleaning pipe 1 and the gap between the scraper 202, and the peeled blockage is washed away, and in the process, the pressure gauge 6 displays that the P2 pressure is normal; The pushing forward length of the scraper 202 in S4 to the end of the remote liquid level meter guide pipe 11 is determined by the pushing forward length of the screw rod 204, the screw rod 204 is provided with a length scale, and the scale accuracy is 1 cm; S5: Reset and pressure relief, after the scraper 202 is pushed to the end of the remote liquid level meter guide pipe 11 in S4, the handle 205 is reversely rotated, the scraper 202 is retreated to the front of the valve three 10, then the valve three 10 is closed, the valve two 9 is closed, the valve one 5 is opened, after the pressure in the cleaning device 2 is reduced to 0 as shown by the pressure gauge 6, the cleaning device 2 is disassembled and the remote liquid level meter is reassembled.

[0028] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An online cleaning device for a vacuum pump liquid level gauge dip tube, comprising a cleaning tube (1), characterized in that, The interior of the cleaning pipe (1) is provided with a cleaning device (2), the outer arc upper portion of the cleaning pipe (1) is fixedly connected with a water outlet pipe (4), the outer arc of the water outlet pipe (4) is fixedly connected with a pressure gauge (6), the outer arc of the water outlet pipe (4) is fixedly connected with a valve one (5), the outer arc lower portion of the cleaning pipe (1) is fixedly connected with a water inlet pipe (8), the outer arc of the water inlet pipe (8) is fixedly connected with a valve two (9), the left end of the cleaning pipe (1) is fixedly connected with a flange (3), and the right side of the cleaning pipe (1) is fixedly connected with a blind plate (7). The cleaning device (2) comprises a handle (205), the left side of the handle (205) is fixedly connected with a screw rod (204), the outer arc of the screw rod (204) is threadedly connected with a nut (203), the outer surface of the nut (203) is fixedly connected with the cleaning pipe (1), the end of the screw rod (204) away from the handle (205) is fixedly connected with a circular baffle (201), and the right side of the circular baffle (201) is fixedly connected with a scraper (202).

2. The vacuum pump gage well online cleaning apparatus of claim 1, wherein, The upper and lower sides of the outer arc of the cleaning pipe (1) are both provided with through holes, the right end of the cleaning pipe (1) is provided with a hexagonal hole, the inner surface of the blind plate (7) is provided with a hexagonal through hole, the blind plate (7) is fixedly connected with the nut (203), the probe of the pressure gauge (6) is located in the interior of the water outlet pipe (4), the water outlet pipe (4) is communicated with the cleaning pipe (1), the water inlet pipe (8) is communicated with the cleaning pipe (1), and the scraper (202) is provided with a plurality of groups, and the plurality of groups of scrapers (202) are circularly arranged with the center of the circular baffle (201) as the array center.

3. The vacuum pump gage well online cleaning apparatus of claim 1, wherein, The left side of the cleaning pipe (1) is fixedly connected with a valve three (10) through the flange (3), and the end of the valve three (10) away from the cleaning pipe (1) is communicated with a remote liquid level meter guide pipe (11).

4. The vacuum pump gage well online cleaning method of claim 1, wherein, The method comprises the following steps: S1: device docking, the remote liquid level meter is removed, the cleaning device (2) is docked with and fixed to the valve three (10) of the remote liquid level meter guide pipe (11); the cleaning device (2) comprises a cleaning pipe (1), a flange (3), a blind plate (7), a nut (203), a screw rod (204), a handle (205), a circular baffle (201) and a scraper (202), the two ends of the cleaning pipe (1) are respectively provided with the flange (3) and the blind plate (7), the middle of the blind plate (7) is provided with the nut (203), the screw rod (204) is matched with the nut (203), one end of the screw rod (204) is located outside the cleaning pipe (1) and is provided with the handle (205), and the other end is located inside the cleaning pipe (1) and is provided with the circular baffle (201) and the scraper (202); S2: pressure presetting, after S1 is completed, the valve one (5) on the water outlet pipe (4) of the cleaning device (2) is closed, the valve two (9) on the water inlet pipe (8) is opened, the pressure is adjusted, the pressure gauge (6) in the cleaning device (2) displays a pressure P2≥0.1MPa, and it is ensured that P2>P1 of the separation tank. S3: the guide tube is conducted, after S2 is completed, valve three (10) is opened slowly, and valve two (9) is adjusted to maintain that pressure table (6) shows P2≥0.1MPa, until valve three (10) is completely opened; S4: the scraping and cleaning are promoted, after S3 is completed, handle (205) is rotated, makes the scraper (202) with screw rod (204) rotation and promotes to the remote liquid level meter guide tube (11) in the distance, the scraper (202) peels off the blockage of the inner wall of the remote liquid level meter guide tube (11), and the soft water flows to the remote liquid level meter guide tube (11) through the gap between the circular baffle (201) and the cleaning pipe (1) and the gap of the scraper (202), and the peeled blockage is washed away, and the process maintains that pressure table (6) shows P2 pressure normal; S5: reset and pressure relief, in S4, the scraper (202) is promoted to the end of the remote liquid level meter guide tube (11), then handle (205) is reversed, the scraper (202) is returned to the front of valve three (10), and then valve three (10) is closed;Valve two (9) is closed, valve one (5) is opened, and after the pressure in the cleaning device (2) is shown by pressure table (6), the cleaning device (2) is disassembled and the remote liquid level meter is reassembled.

5. The vacuum pump gage well online cleaning method of claim 4, wherein, The scraper (202) in S1 is composed of three small round steels with a diameter of 8-10mm, the angle between each small round steel is 120°, the end of the small round steel away from the circular baffle (201) is provided with an arc chamfer, and the material of the small round steel is wear-resistant and corrosion-resistant stainless steel.

6. The vacuum pump gage well online cleaning method of claim 4, wherein, The diameter of the circular baffle (201) in S1 is smaller than the diameter of the cleaning pipe (1) by 0.5-1cm, the distance between the circular baffle (201) and the scraper (202) is 5-8cm, the thickness of the circular baffle (201) is 3-5mm, and the circular baffle (201) is uniformly provided with three through holes with a diameter of 1-2cm.

7. The vacuum pump gage well online cleaning method of claim 4 wherein, The connection mode of the cleaning pipe (1) with the flange (3) and the blind plate (7) in S1 is continuous welding, double-sided welding is used at the welding position, the height of the welding leg is 1-1.5 times the wall thickness of the cleaning pipe (1), and after welding, a water pressure test is required, the test pressure is 0.5MPa, and the pressure is maintained for 30 minutes without leakage.

8. The vacuum pump gage well online cleaning method of claim 4, wherein, The self-adaptive adjustment algorithm of the preset pressure in S2 adjusts the opening of valve two (9) based on the preset pressure difference value rule by collecting P1 and P2 in real time, so that P2 is stabilized in the target range and meets P2≥0.1MPa, the adjustment range of P2 shown by pressure table (6) in S2 is 0.1-0.3MPa, the accuracy level of pressure table (6) is 0.4 level, and the range is 0-0.6MPa.

9. The vacuum pump gage well online cleaning method of claim 4 wherein, In S3, when valve two (9) maintains that pressure table (6) shows P2≥0.1MPa, the pressure value is monitored in real time through the pressure table (6) on the cleaning device (2), and the pressure data is recorded every 5 seconds.

10. The method of claim 4, wherein, In S4, the pushing length of the scraper (202) to the end of the remote liquid level meter guide tube (11) is determined by the pushing length of the screw rod (204), and the length scale is provided on the screw rod (204), and the scale accuracy is 1cm.

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