CN220047479U - Filter before vacuum pump - Google Patents

Abstract

The utility model discloses a vacuum pump pre-filter, which comprises a high-pressure shell, a cylinder type filtering device, a filter detection device and a cleaning device, wherein the integrity and the blocking degree of a filter are detected through the filter detection device while toxic gas is filtered, so that whether the filter needs to be replaced or not and whether the filtered gas meets the standard or not are judged, the cylinder type filtering device and the filter detection device are cleaned by the cleaning device, the toxic gas is treated, meanwhile, the non-toxicity of equipment is ensured, the personal safety of maintenance personnel is protected, and the safety and the efficiency of treating the toxic gas are improved.

Description

Filter before vacuum pump

Technical Field

The utility model relates to the technical field of filters, in particular to a vacuum pump front filter.

Background

At present, when some pharmaceutical enterprises freeze-dry by using the freeze dryer, the cavity in the freeze dryer needs to be subjected to high-strength vacuumizing operation, the liquid medicine can become powder state in the freeze dryer, at the moment, dust particles can float in the cavity, and when some medicines become powder state, the medicine property can become toxic, and when the vacuum pump is used for carrying out vacuumizing operation on the cavity of the freeze dryer, toxic particulate matters are mixed in extracted gas, so that the problem of harm of the extracted toxic gas to the environment and the personal safety of equipment maintenance personnel are solved.

In order to treat toxic gas and protect personal safety of equipment maintenance personnel, the traditional treatment mode is generally to increase an activated carbon adsorption device at the rear end of a filter so as to meet the discharge requirement, and meanwhile, the vacuum pump is replaced integrally and regularly, but the scheme not only needs to consume a large amount of manpower and material resources of enterprises, but also can reduce production efficiency.

Disclosure of Invention

The utility model aims to provide a filter before a vacuum pump, which solves the problems that the vacuum pump effectively filters toxic gases before extracting the toxic gases and ensures that the filter is nontoxic.

In order to solve the above-mentioned object, the present utility model provides a vacuum pump pre-filter, comprising a high-pressure housing, a cartridge filter, a filter detection device and a cleaning device;

the high-pressure shell is used for bearing the cylinder type filtering device, the filter detection device and the cleaning device;

the cylinder type filtering device is used for filtering gas and is arranged inside the high-pressure shell;

the filter detection device is used for detecting the integrity and the blocking degree of the cartridge type filtering device; the cleaning device is used for cleaning the cylinder type filtering device and the filter detection device.

Optionally, the high-pressure shell comprises a cylinder body, a cylinder cover, an air inlet port and an air outlet port;

the cylinder body is connected with the cylinder cover, and the cylinder body is provided with the air inlet port and the air outlet port.

Optionally, the high pressure housing further comprises an upstream smoke generating interface valve and a junction box assembly;

the upstream fuming interface valve is arranged on the air inlet port;

the adapter box component is arranged on the outer wall of the cylinder body.

Optionally, the cartridge filter device comprises a cartridge filter and a filter press;

one end of the filter pressing piece is arranged at the top of the cartridge filter, and the other end of the filter pressing piece is arranged on the inner wall of the cartridge.

Optionally, the cartridge filter device further comprises a seal slide plate and a crank assembly;

the crank assembly comprises a screw rod and a crank, the screw rod is rotationally connected with the crank, and the crank assembly is used for controlling the sealing slide plate to move up and down in the cylindrical filter along the height direction of the cylindrical filter.

Optionally, the filter detection device comprises a filter differential pressure detection device and a filter integrity detection device;

the filter differential pressure detection device is used for detecting the blocking degree of the cylinder type filtering device;

the filter integrity sensing ring device is configured to sense the integrity of the cartridge filter device.

Optionally, the filter differential pressure detection device comprises a filter rear end differential pressure detection valve and a filter front end differential pressure detection valve; the filter rear end pressure difference detection valve and the filter front end pressure difference detection valve are arranged on the outer wall of the cylinder body, the filter front end pressure difference detection valve is close to the air inlet port, and the filter rear end pressure difference detection valve is close to the air outlet port.

Optionally, the filter integrity detection device comprises a filter integrity detection ring device and a crank seal rotation system;

the crank seal rotation system is coupled to the filter integrity sensing ring assembly and is configured to control the filter integrity sensing ring assembly to move up and down along the height of the cartridge filter.

Optionally, the filter integrity detection ring device comprises a sliding module, a detection ring, an upstream fuming concentration detection interface valve 41 and a downstream fuming concentration detection interface valve;

the sliding module is arranged on the inner wall of the cylinder body, and one side of the detection ring is arranged on the sliding module in a sliding manner and sleeved outside the cylinder filter;

the upstream fuming concentration detection interface valve is arranged on the outer wall of the cylinder body 1, and a cleaning air pipe is connected between the downstream fuming concentration detection interface valve and the detection ring.

Optionally, the downstream fuming concentration detection interface valve comprises a detection loop pipeline connection valve, a detection loop intersection and a detection summary valve;

the detection loop pipeline connection valve is arranged on the outer wall of the cylinder body, two ends of the detection loop pipeline connection valve are respectively connected with the detection loop and the detection loop intersection, the detection loop intersection and the detection collecting valve are arranged on the transfer box assembly, and the quantity of the detection loop intersection and the detection loop pipeline connection valve is consistent.

Optionally, the cleaning device comprises a filter front end cleaning spray ball assembly, a filter rear end cleaning spray ball assembly, a cleaning valve, a drainage valve, a compressed air access valve, a filter rear end water outlet and a filter front end water outlet;

the front end cleaning spray ball assembly of the filter is connected with the front end water outlet of the filter and is close to the front end of the barrel type filtering device; the filter rear end cleaning spray ball assembly is connected with the filter rear end water outlet and is close to the rear end of the barrel type filtering device;

the cleaning valve, the drainage valve and the compressed air access valve are all arranged on the adapter box assembly.

Compared with the prior art, the filter before the vacuum pump comprises the high-pressure shell, the cylinder type filtering device, the filter detection device and the cleaning device, when toxic gas is filtered, the integrity and the blocking degree of the filter are detected through the filter detection device, so that whether the filter needs to be replaced or not and whether the filtered gas meets the standard or not are judged, the cylinder type filtering device and the filter detection device are cleaned by the cleaning device, the toxic gas is processed, meanwhile, the non-toxicity of the filter is guaranteed, the personal safety of maintenance personnel is protected, and the safety and the efficiency of processing the toxic gas are improved.

Drawings

FIG. 1 is a schematic view showing the appearance of a filter before a vacuum pump according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram showing the external appearance of a filter before a vacuum pump according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a front filter of a vacuum pump in accordance with an embodiment of the present utility model;

FIG. 4 is a second cross-sectional view of a vacuum pump front filter in accordance with an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a crank seal rotation system in accordance with an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a filter integrity sensing ring in accordance with an embodiment of the present utility model;

FIG. 7 is a schematic view of a transfer box assembly according to an embodiment of the present utility model;

FIG. 8 is a schematic diagram of a filter detection process in an embodiment of the utility model.

Detailed Description

The present utility model will be described in more detail below with reference to the drawings, in which preferred embodiments of the utility model are shown, it being understood that one skilled in the art can modify the utility model herein described while still achieving the advantageous effects of the utility model. Accordingly, the following description is to be construed as broadly known to those skilled in the art and not as limiting the utility model.

The utility model is more particularly described by way of example in the following paragraphs with reference to the drawings. The advantages and features of the present utility model will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model.

The utility model provides a vacuum pump pre-filter, which comprises a high-pressure shell 100, a cylinder type filtering device, a filter detection device and a cleaning device.

The high-pressure housing 100 is used to carry a cartridge filter device, a filter detection device, and a cleaning device.

The cartridge filter device is for filtering gas, and is disposed inside the high pressure housing 100.

The filter detection device is used for detecting the integrity and the blocking degree of the cartridge type filter device.

The cleaning device is used for cleaning the cylinder type filtering device and the filter detection device.

Specifically, referring to fig. 1-2, the high pressure housing 100 includes a cylinder 1, a cylinder cover 2, an air inlet 4, an air outlet 5, and the air inlet 4 and the air outlet 5 are disposed on the cylinder 1.

The high-pressure shell 100 further comprises a compression connection assembly 3, and the cylinder 1 and the cylinder cover 2 are connected through the compression connection assembly 3 so as to ensure the high-pressure environment of the cylinder 1.

The high-pressure housing 100 further comprises an upstream smoke generating interface valve 38 and a transfer box assembly 42, the upstream smoke generating interface valve 38 is arranged on the air inlet port 4, the air inlet port 4 is connected with a freeze dryer box (not shown in the figure), the air outlet port 5 is connected with a vacuum pump (not shown in the figure), waste gas in the freeze dryer box enters through the air inlet port 4, the upstream smoke generating interface valve 38 is externally connected with an aerosol generator, and smoke generated waste gas enters the barrel 1 and is discharged through the air outlet port 5 after being filtered.

The adapter box assembly 42 is arranged on the outer wall of the cylinder body 1.

Referring to fig. 3-4, the cartridge filter device includes a cartridge filter 8 and a filter pressing member 11, wherein one end of the filter pressing member 11 is disposed at the top of the cartridge filter 8, the other end is disposed on the inner wall of the cartridge 1, the cartridge filter 8 is fixed inside the cartridge 1, and the cartridge filter 8 is pressed and fixed by the filter pressing member 11.

The cartridge filter device further comprises a sealing slide plate 9 and a crank assembly 10; the crank assembly 10 comprises a screw rod and a crank, the screw rod is rotationally connected with the crank, the screw rod is coaxially arranged with the cylinder type filter 8 and the sealing slide plate 9, and the screw rod is arranged inside the cylinder type filter 8 and penetrates through the sealing slide plate 9; by rotating the crank, the sealing slide plate 9 moves up and down along the screw rod inside the cartridge filter 8, and the height range of the movement of the sealing slide plate 9 is the height of the cartridge filter 8; the crank is operated to rotate the sealing slide plate 9 to the top of the cartridge filter 8, and the cartridge filter 8 is opened at the moment to perform filtration; when the filter needs to be replaced, before the filter is disassembled, the crank is operated to rotate the sealing slide plate 9 to the bottom, at the moment, the cartridge filter 8 is in a closed state, toxic substances are also sealed in the cartridge filter 8, and the filter can be safely replaced.

Specifically, the filter detection device comprises a filter differential pressure detection device and a filter integrity detection device, the filter differential pressure detection device is used for detecting the blocking degree of the cylinder type filtering device, the filter integrity detection ring device is used for detecting the integrity of the cylinder type filtering device, if the detection is passed, the waste gas treated by the filter accords with the safety standard, and if one disqualified waste gas exists, the filter needs to be replaced and cleaned.

The filter differential pressure detection device comprises a filter rear end differential pressure detection valve 39 and a filter front end differential pressure detection valve 40; the filter rear end pressure difference detection valve 39 and the filter front end pressure difference detection valve 40 are arranged on the outer wall of the cylinder body 1 and are externally connected with a pressure difference testing instrument (not shown in the figure), the filter front end pressure difference detection valve 40 is close to the air inlet port 4, and the filter rear end pressure difference detection valve 39 is close to the air outlet port 5; the filter differential pressure detection device is used for judging whether the filter has serious blocking condition or not.

Aiming at the material of the filter element, the highest surface wind speed exists under the premise of ensuring the efficiency of the filter, the efficiency of the filter can be reduced when exceeding the highest surface wind speed, the filter is regarded as unqualified, the highest surface wind speed has the corresponding highest pressure difference, the detected resistance of the filter is only required to be ensured to be smaller than the highest pressure difference during detection, and the filter needs to be replaced in advance when the detected resistance of the filter is close to the highest pressure difference.

The filter integrity detection device comprises a filter integrity detection ring device 13 and a crank seal rotation system 12; the crank seal rotation system 12 is coupled to the filter integrity sensing ring assembly 13 and is used to control the movement of the filter integrity sensing ring assembly 13 up and down along the height of the cartridge filter assembly 8.

Specifically, referring to fig. 5, the crank seal rotating system 12 includes a cylinder outer fixing base 22, a cylinder inner fixing base 23, a seal base 24, a first gear 25, a rotating shaft 26, and a seal ring 27.

The cylinder outer fixing seat 22, the cylinder inner fixing seat 23, the sealing base 24, the gear 25 and the sealing ring 27 are all arranged on the rotating shaft 26; the cylinder outside fixing seat 22 is arranged outside the cylinder 1, the cylinder inside fixing seat 23 is arranged inside the cylinder 1, the sealing seat 24 is connected with the cylinder inside fixing seat 23 through screws, the sealing ring 27 ensures the air tightness when the crank sealing rotating system 12 rotates, and the first gear 25 is arranged at the top of the rotating shaft 26.

The filter integrity sensing ring arrangement 13 comprises a slide module 14, a sensing ring 15, an upstream smoke concentration sensing interface valve 41 and a downstream smoke concentration sensing interface valve.

The sliding module 14 is arranged on the inner wall of the cylinder body 1, and one side of the detection ring 15 is arranged on the sliding module 14 in a sliding manner and sleeved outside the cylinder filter 8.

Specifically, referring to fig. 6, the filter integrity test ring device 13 further includes a guide rod 16, a guide rod upper fixing block 17, a guide rod lower fixing block 18, a slider lower fixing block 19, a slider upper fixing block 21, a slider connector 20, and a second gear.

The sliding module 14 is fixed on the cylinder 1 through a lower sliding block fixing block 19 and an upper sliding block fixing block 21, the upper sliding block fixing block 21 is connected with the upper part of the sliding module 14 through a sliding block connecting piece 20, one side of the detection ring 15 is arranged on the sliding module 14 in a sliding mode, the guide rod 16 is arranged on the other side of the detection ring, the guide rod 16 is fixed on the cylinder 1 through the upper sliding block fixing block 17 and the lower sliding block fixing block 18, the guide rod 16 prevents the detection ring 15 from shaking in the vertical sliding process, and a second gear is arranged at the top of the sliding module and is in transmission connection with the first gear 25.

An operator can sleeve the crank on the rotating shaft 26, and drives the module on the sliding module 14 to move up and down by rotating the crank and driving the first gear 25 and the second gear on the top of the sliding module, so as to drive the detection ring 15 to move up and down along the height direction of the cartridge filter 8 to collect the filtered gas sample.

In addition, an upstream fuming concentration detection interface valve 41 is arranged on the outer wall of the cylinder body 1, a cleaning air pipe is connected between the downstream fuming concentration detection interface valve and the detection ring 15, and the detection ring 15 is used for collecting filtered gas samples in a partitioning manner in the process of moving up and down along the cylinder filter 8, and the filtered gas samples are conveyed to the downstream fuming concentration detection interface valve through the cleaning air pipe.

Specifically, the downstream fuming concentration detection interface valves include detection loop road connection valves 28A, 29A, 31A and 32A, detection loop intersections 28B, 29B, 31B and 32B, and a detection summary valve 35;

the detection loop road connection valves 28A, 29A, 31A and 32A are arranged on the outer wall of the cylinder body 1, the detection loop road junctions 28B, 29B, 31B and 32B and the detection collecting valve 35 are arranged on the adapter box assembly 42, and the detection loop road junctions 28B, 29B, 31B and 32B are consistent in number and in one-to-one correspondence with the detection loop road connection valves 28A, 29A, 31A and 32A.

One end of each detection loop pipeline connection valve 28A, 29A, 31A and 32A is respectively connected with the detection loop 15, and the other end is respectively connected with each detection loop pipeline crossing 28B, 29B, 31B and 32B; the filtered gas sample is collected by the detection loop 15, and is transferred to the detection loop road connection valves 28A, 29A, 31A and 32A through the clean gas pipe, and then transferred to the detection loop road junctions 28B, 29B, 31B and 32B, respectively.

In this embodiment, the pre-vacuum pump filter includes four detection loop pipe connection valves and four detection loop pipe intersections, which are respectively a first detection loop pipe connection valve 28A, a second detection loop pipe connection valve 29A, a third detection loop pipe connection valve 31A, a fourth detection loop pipe connection valve 32A, a first detection loop pipe intersection 28B, a second detection loop pipe intersection 29B, a third detection loop pipe intersection 31B, and a fourth detection loop pipe intersection 32B, and four detection loop pipe connection valves and four detection loop pipe intersections are set in one-to-one correspondence, and each group of detection loop pipe connection valves and detection loop pipe intersections are all connected by clean air pipes.

In this embodiment, since the filter device may be configured with a filter having a larger volume, the detection process may be performed in sections, in this embodiment, divided into four sections, and divided equally according to the arc length of the filter, and only one set of detection loop connection valves and their corresponding detection loop intersections are opened for each detection, so as to control the detection flow and improve the accuracy of the detection; in other examples, the number of detection loop road connection valves and detection loop intersections may be adjusted according to the volume of the filter and the filtration requirements.

The upstream smoke concentration detection interface valve 41 is externally connected with a diluter and a particle counter (not shown), and one end of the detection summary valve 35 is externally connected with the particle counter (not shown).

The cleaning device comprises a filter front end cleaning spray ball assembly 36, a filter rear end cleaning spray ball assembly 37, a cleaning valve 33, a drainage valve 34, a compressed air access valve 30, a filter rear end water outlet 6 and a filter front end water outlet 7.

The filter front end cleaning spray ball assembly 36 is connected with the filter front end water outlet 7 and is close to the front end of the barrel type filtering device; the filter rear end cleaning spray ball assembly 37 is connected to the filter rear end drain 6 and is adjacent the cartridge filter rear end.

Referring to fig. 7, the purge valve 33, the drain valve 34 and the compressed air inlet valve 30 are all disposed on the adaptor box assembly 42.

Referring to the filter detection flow chart shown in fig. 8, in the gas filtering process, the integrity and the blocking degree of the filter need to be detected to determine whether the filter needs to be replaced; when the filter integrity is detected, the upstream fuming interface valve 38 is externally connected with an aerosol generator, the upstream fuming concentration detection interface valve 41 is externally connected with a diluter and then connected with a particle counter, and the detection summary valve 35 is externally connected with the particle counter.

After the vacuum pump is turned on and turned on, the upstream smoke generation interface valve 38 and the upstream smoke generation concentration detection interface valve 41 are opened, unfiltered gas enters the particle counter for detection after smoke generation, and after the particle counter is stable, the upstream smoke generation concentration detection interface valve 41 is closed.

Opening a detection ring pipeline connection valve 28A and a detection summary valve 35, opening a particle counter, detecting filtered fuming gas, rotating a crank sealing rotating system 12, driving a detection ring 15 to move up and down, and detecting the surface of the cartridge filter 8; similarly, the detection loop pipe connection valve 29A, the detection loop pipe connection valve 31A, or the detection loop pipe connection valve 32A are opened in order, respectively, to perform sectional detection on the cartridge filter 8.

The particle counter compares the detection data before and after filtration, and when the particle counter determines that the detection is acceptable, the integrity of the cartridge filter 8 is verified to be good.

When the detection is unqualified, the situation that the cartridge filter 8 is likely to be damaged and needs to be replaced is proved, when the replacement is carried out, the front end of the filter is firstly washed by using the front end cleaning spray ball assembly 36 and the rear end cleaning spray ball assembly 37, meanwhile, the cleaning valve 33 is opened, the detection loop pipeline connecting valves 28A, 29A, 31A and 32A are opened to clean the pipeline, the rear end water outlet 6 of the filter, the front end water outlet 7 of the filter and the water outlet valve 34 are opened to drain after the cleaning is finished, then the compressed air access valve 30 is opened, the detection loop pipeline connecting valves 28A, 29A, 31A and 32A are still opened, and all pipelines are dried to finish cleaning and drying.

Finally, the cylinder cover 2 is opened, the crank assembly 10 is operated to rotate the sealing sliding plate 9 to the bottom for sealing, the cylinder type filter 8 is closed at the moment, the cylinder type filter 8 is taken out for replacement, and the harm of residual toxic particles of the filter to equipment maintenance personnel is prevented.

Further, in the toxic gas filtering process, the filter blocking degree is detected by the external differential pressure testing instrument connected with the differential pressure detecting valve 39 at the rear end of the filter and the differential pressure detecting valve 40 at the front end of the filter, under the normal use condition, the resistance detected each time can be gradually increased on the basis of rated differential pressure, the detected differential pressure is compared with the last data before each use, if the differential pressure is larger than 15% of the last time, the dust generated in the use process is larger, and when the detected differential pressure is close to the maximum differential pressure, the filter is required to be replaced.

When the filter is replaced, the front end and the rear end of the filter are required to be cleaned, the front end cleaning spray ball assembly 36 and the rear end cleaning spray ball assembly 37 of the filter are firstly used for water injection cleaning of the front end and the rear end of the filter, meanwhile, the cleaning valve 33 is opened, and the rear end water outlet 6, the front end water outlet 7 and the water outlet valve 34 of the filter are opened for water discharge after cleaning is completed, so that cleaning is completed.

Finally, the cylinder cover 2 is opened, the crank assembly 10 is operated to rotate the sealing sliding plate 9 to the bottom for sealing, the cylinder type filter 8 is closed at the moment, the cylinder type filter 8 is taken out for replacement, and the harm of residual toxic particles of the filter to equipment maintenance personnel is prevented.

In summary, the pre-vacuum pump filter of the present utility model includes a cartridge filter device, a filter detection device and a cleaning device, which can filter, detect and clean toxic gases, and detect the integrity and blockage of the filter by the filter pressure difference detection device and the filter integrity detection device, so as to determine whether the filter needs to be replaced; through addding belt cleaning device, to the cylinder filter equipment with filter detection device washs, has guaranteed the harmlessness of equipment, has avoided the secondary injury to maintainer, and the cylinder filter is when changing, through removing sealed slide, will poison the material seal, guarantees that poison material can not reveal, has improved the security and the filtration efficiency of handling poisonous gas.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (11)

1. The vacuum pump pre-filter is characterized by comprising a high-pressure shell, a cylinder type filtering device, a filter detection device and a cleaning device;

the high-pressure shell is used for bearing the cylinder type filtering device, the filter detection device and the cleaning device;

the cylinder type filtering device is used for filtering gas and is arranged inside the high-pressure shell;

the filter detection device is used for detecting the integrity and the blocking degree of the cartridge type filtering device; the cleaning device is used for cleaning the cylinder type filtering device and the filter detection device.

2. The vacuum pump pre-filter of claim 1, wherein the high pressure housing comprises a barrel, a barrel cover, an air inlet port, an air outlet port;

the cylinder body is connected with the cylinder cover, and the cylinder body is provided with the air inlet port and the air outlet port.

3. The vacuum pump pre-filter of claim 2 wherein the high pressure housing further comprises an upstream fuming interface valve and a pod assembly;

the upstream fuming interface valve is arranged on the air inlet port;

the adapter box component is arranged on the outer wall of the cylinder body.

4. A vacuum pump pre-filter as claimed in claim 3, wherein the cartridge filter means comprises a cartridge filter and a filter press;

one end of the filter pressing piece is arranged at the top of the cartridge filter, and the other end of the filter pressing piece is arranged on the inner wall of the cartridge.

5. The vacuum pump pre-filter of claim 4 wherein said cartridge filter assembly further comprises a seal slide and crank assembly;

the crank assembly comprises a screw rod and a crank, and is used for controlling the sealing sliding plate to move up and down in the cylindrical filter along the height direction of the cylindrical filter.

6. The pre-vacuum pump filter of claim 5 wherein said filter detection means comprises filter differential pressure detection means and filter integrity detection means;

the filter differential pressure detection device is used for detecting the blocking degree of the cylinder type filtering device;

the filter integrity sensing ring device is configured to sense the integrity of the cartridge filter device.

7. The vacuum pump pre-filter according to claim 6, wherein the filter differential pressure detecting means comprises a filter rear end differential pressure detecting valve, a filter front end differential pressure detecting valve; the filter rear end pressure difference detection valve and the filter front end pressure difference detection valve are arranged on the outer wall of the cylinder body, the filter front end pressure difference detection valve is close to the air inlet port, and the filter rear end pressure difference detection valve is close to the air outlet port.

8. The vacuum pump pre-filter of claim 6 wherein said filter integrity detection means comprises a filter integrity detection ring means and a crank seal rotation system;

the crank seal rotation system is coupled to the filter integrity sensing ring assembly and is configured to control the filter integrity sensing ring assembly to move up and down along the height of the cartridge filter.

9. The vacuum pump pre-filter of claim 8 wherein the filter integrity check ring means comprises a slide module, a check ring, an upstream smoke concentration check interface valve, and a downstream smoke concentration check interface valve;

the sliding module is arranged on the inner wall of the cylinder body, and one side of the detection ring is arranged on the sliding module in a sliding manner and sleeved outside the cylinder filter;

the upstream fuming concentration detection interface valve is arranged on the outer wall of the cylinder body (1), and a cleaning air pipe is connected between the downstream fuming concentration detection interface valve and the detection ring.

10. The vacuum pump prefilter of claim 9, wherein said downstream fuming concentration detection interface valves include a detection loop piping connection valve, a detection loop junction, and a detection summary valve;

the detection loop pipeline connection valve is arranged on the outer wall of the cylinder body, two ends of the detection loop pipeline connection valve are respectively connected with the detection loop and the detection loop intersection, the detection loop intersection and the detection collecting valve are arranged on the transfer box assembly, and the quantity of the detection loop intersection and the detection loop pipeline connection valve is consistent.

11. The vacuum pump front strainer of claim 10 wherein said cleaning apparatus includes a strainer front end cleaning spray ball assembly, a strainer rear end cleaning spray ball assembly, a cleaning valve, a drain valve, a compressed air access valve, a strainer rear end drain, and a strainer front end drain;

the front end cleaning spray ball assembly of the filter is connected with the front end water outlet of the filter and is close to the front end of the barrel type filtering device; the filter rear end cleaning spray ball assembly is connected with the filter rear end water outlet and is close to the rear end of the barrel type filtering device;

the cleaning valve, the drainage valve and the compressed air access valve are all arranged on the adapter box assembly.