Disclosure of Invention
The present invention provides a device and a method for controlling filtration of a vacuum apparatus to solve the problems set forth in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The utility model provides a vacuum equipment filters controlling means, includes pipeline and vacuum equipment, the inside fixed mounting of pipeline has the erection column, threaded opening has been seted up to one side symmetry of erection column, be equipped with the filter component who is used for filtering gas in the threaded opening, the inside fixed mounting of pipeline has the baffle, the through-hole has been seted up in the outside of baffle, one side fixed mounting that the baffle is close to the erection column has the flexible pipe that corresponds with the through-hole position, the one end fixed mounting that the baffle was kept away from to flexible pipe has the ring canal, the inside of ring canal is equipped with the subassembly that is used for inhaling gas, the one end fixed mounting that the ring canal is close to the erection column has the sealing washer, the sealing washer is contradicted with the erection column, be equipped with on the pipeline and be used for controlling the ring pipe and take sealing washer and erection column separation and carry out the control assembly who removes, filter component passes through the connecting pipe and is connected with vacuum equipment.
Further, the control assembly comprises a rectangular block which is symmetrically and fixedly arranged on the outer side of the circular pipe, a support is arranged on an outer sliding sleeve of the rectangular block, a sliding rod is fixedly arranged in the support, the rectangular block is sleeved outside the sliding rod in a sliding mode, a first spring is sleeved between the rectangular block and the baffle plate outside the sliding rod, a round rod is fixedly arranged on the outer side of the rectangular block, a driving frame used for driving the round rod to move towards a direction far away from the mounting column is symmetrically arranged on one side, close to the mounting column, of the baffle plate, a vertical groove is symmetrically arranged on one side, close to the mounting column, a screw rod is rotatably arranged in the vertical groove, a motor is fixedly arranged on the top wall of the vertical groove, an output shaft of the motor is fixedly connected with one end of the screw rod, one end of the support is sleeved outside the screw rod in a threaded mode, a pressure sensor is fixedly arranged on the top wall of the pipeline, a controller is fixedly arranged on one side of the baffle plate, an alarm is arranged on the outer side of the pipeline, and the controller can control the motor.
Further, the driving frame is specifically configured as a plate-shaped member with inclined planes symmetrically arranged on one side close to the round rod, a horizontal section for connecting the inclined planes is arranged between the two inclined planes, and the driving frame is fixedly connected with the mounting column.
Further, the suction assembly comprises an annular cylinder fixedly installed on the inner side of the annular pipe, suction holes are formed in the annular cylinder at equal intervals on one side, close to the mounting column, of the annular cylinder, a piston is arranged in the annular cylinder, a second spring is symmetrically and fixedly installed on one side, close to the baffle, of the piston, one end, far away from the piston, of the second spring is fixedly connected with the inner wall of the annular cylinder, a first electromagnet is symmetrically and fixedly installed on the inner wall, far away from the mounting column, of the annular cylinder, one side, close to the first electromagnet, of the piston, is made of iron, and the controller can control the first electromagnet.
Further, the round groove corresponding to the suction hole is formed in one side, close to the suction hole, of the piston, the cleaning rod is rotatably mounted in the round groove, one end of the cleaning rod extends out of the suction hole, a torsion spring is sleeved outside the cleaning rod, two ends of the torsion spring are fixedly connected with the inner wall of the round groove and the cleaning rod respectively, and a rotation positioning assembly used for driving the cleaning rod to rotate and positioning the cleaning rod is arranged outside the cleaning rod.
Further, rotate the locating component including setting up the mounting groove with the circular slot intercommunication on the piston, the clearance pole is kept away from the one end middle part fixed mounting of suction orifice and is had the take-up reel, the take-up reel is located the mounting groove, the wire passing hole with the mounting groove intercommunication has been seted up to one side of being close to the suction orifice of piston, the inside in wire passing hole is equipped with the stay cord, the both ends of stay cord respectively with the inner wall and the take-up reel fixed connection of annular cylinder, the stay cord rolling is on the take-up reel, one side fixed mounting that the suction orifice was kept away from to the piston has the casing that corresponds with the take-up reel, the rectangle mouth has all been seted up in the one side middle part that the suction orifice was kept away from to the piston and the outside of take-up reel, the inside slidable mounting of casing has the iron plate, one end fixed mounting that the iron plate is close to the rectangle mouth complex rectangle post, one side inner wall fixed mounting that the iron plate was kept away from to the casing has the second electro-magnet, one side that the iron plate is close to the second electro-magnet is through a plurality of third springs and casing inner wall fixed connection, the second electro-magnet can be controlled by the controller.
Further, the filter component comprises a cold trap arranged in the threaded port, a cylinder is fixedly arranged on one side, far away from the baffle, of the cold trap, the cylinder is in threaded connection with the threaded port, and one end of the cylinder is fixedly connected with the connecting pipe.
The invention also provides a method for performing filtration control by using the vacuum equipment filtration control device, which comprises the following steps:
s1, when the device is used, a pipe for inputting gas is connected with a pipeline, the gas enters the pipeline, then enters the telescopic pipe and the annular pipe through the ports, corrosive and large-particle impurities are filtered by the filtering assembly and then enter the vacuum equipment through the connecting pipe, and the corrosive and large-particle impurities are filtered, so that the vacuum equipment can be protected;
s2, as impurities are more and more filtered, the filter assembly is blocked, so that the air pressure in a pipeline is increased, at the moment, the control assembly drives the ring pipe to be separated from the mounting column and move to move towards the other filter assembly, in the whole process, the gas passing through the ring pipe and the gas in the ring pipe continuously is sucked at the moment, so that the gas cannot leak in the ring pipe and the area outside the ring pipe, the final ring pipe is in contact with the mounting column, the ring pipe is opposite to the other filter assembly, at the moment, the suction assembly works reversely, and the sucked gas is discharged after being filtered, and the gas is discharged;
S3, in the whole process, as the sealing ring is not contacted with the mounting column when moving, the sealing ring cannot deform due to friction between the sealing ring and the mounting column, after the sealing ring is reset, the sealing ring can keep the original form and the outer side of the mounting column to be in conflict, so that the sealing ring cannot leak when gas flows, and in the process of switching the filter assembly, after the sealing ring is separated from the mounting column, the gas is continuously inhaled by the inhalation assembly, so that the gas cannot leak outside, and in the process of taking out and maintaining the fault filter assembly, the gas cannot leak to the outside and be inhaled by a human body, and the whole process is enabled to be free from suspending the gas by switching the filter assembly, so that the uninterrupted in the whole process is ensured, and the working efficiency is ensured.
The invention has the technical effects and advantages that:
1. The invention can process the gas introduced into the vacuum equipment through the filter assembly, so that the vacuum equipment can be protected, and when the filter assembly is blocked, the filter assembly can be switched to another filter assembly, so that the gas is not required to be introduced into the whole process, the uninterrupted operation in the whole process is ensured, and the working efficiency is ensured;
2. The invention can ensure that the sealing ring is not contacted with the mounting column when the sealing ring is moved in the process of switching the filtering component, so that the sealing ring can not deform due to friction between the sealing ring and the mounting column, the sealing ring can still keep the original form to be in contact with the outer side of the mounting column after the sealing ring is reset, thus the sealing ring can not leak when gas flows later, and in the process of switching the filtering component, the sealing ring is separated from the mounting column, the gas is continuously inhaled by the inhalation component, so that the gas can not leak outside, and the condition that the gas leaks to the outside and is inhaled by a human body can not occur when the fault filtering component is taken out and maintained later;
3. the invention can clean the suction hole for sucking gas after switching and self-clean the cleaning rod for cleaning the suction hole, thereby ensuring the smoothness of the suction hole and further ensuring the suction and collection effects of the gas.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments.
The invention provides a vacuum equipment filtering control device, as shown in fig. 1 to 8, the vacuum equipment filtering control device comprises a pipeline 1 and vacuum equipment 37, a mounting column 2 is fixedly arranged in the pipeline 1, threaded openings are symmetrically formed in one side of the mounting column 2, a filtering component for filtering gas is arranged in the threaded openings, a baffle 4 is fixedly arranged in the pipeline 1, a through opening 3 is formed in the outer side of the baffle 4, a telescopic pipe 5 corresponding to the position of the through opening 3 is fixedly arranged on one side of the baffle 4, one end, far away from the baffle 4, of the telescopic pipe 5 is fixedly provided with a ring pipe 6, a suction component for sucking gas is arranged in the ring pipe 6, a sealing ring 7 is fixedly arranged at one end, close to the mounting column 2, of the ring pipe 6, the sealing ring 7 is abutted against the mounting column 2, a control component for controlling the ring pipe 6 to be separated from the mounting column 2 and move is arranged on the pipeline 1, and the filtering component is connected with the vacuum equipment 37 through a connecting pipe 34.
When in use, the pipe for inputting gas is connected with the pipeline 1, the gas enters the pipeline 1, then enters the telescopic pipe 5 and the annular pipe 6 through the port 3, corrosive and large-particle impurities are filtered by the filtering component and then enter the vacuum equipment 37 through the connecting pipe 34, the vacuum equipment 37 can be protected through the filtration of the corrosive and large-particle impurities, the filtering component is blocked as the impurities are more and more, the air pressure in the pipeline 1 is increased, the control component drives the annular pipe 6 to separate from the mounting column 2 with the sealing ring 7 and move, so that the gas moves towards the other filtering component, the gas in the annular pipe 6 and the gas in the sealing ring 7 are sucked continuously at the moment in the whole process, so that the gas cannot leak in the areas outside the annular pipe 6 and the sealing ring 7, finally, the sealing ring 7 is in contact with the mounting column 2, the ring pipe 6 is opposite to the other filtering component, at the moment, the suction component works reversely, the sucked gas is discharged, so that the gas is discharged after filtering, in the whole process, the sealing ring 7 is not contacted with the mounting column 2 when moving, so that the sealing ring 7 cannot deform due to friction between the sealing ring 7 and the mounting column 2, after the sealing ring 7 is reset, the sealing ring 7 still keeps the original form in contact with the outer side of the mounting column 2, so that the gas cannot leak when flowing, in the process of switching the filtering component, after the sealing ring 7 is separated from the mounting column 2, the gas is continuously sucked by the suction component, so that the gas cannot leak outside, and in the process of taking out and maintaining the failed filtering component, the gas cannot leak to the outside and be sucked by a human body, and through the switching to filtering component for the whole in-process need not to pause the income of gaseous, guarantees the uninterrupted in-process, guarantees work efficiency.
As shown in fig. 2 and 6, the control assembly comprises a rectangular block 8 symmetrically and fixedly installed at the outer side of a collar 6, a support 9 is sleeved outside the rectangular block 8 in a sliding manner, a sliding rod 10 is fixedly installed inside the support 9, the rectangular block 8 is sleeved outside the sliding rod 10 in a sliding manner, a first spring 11 is sleeved outside the sliding rod 10 and between the rectangular block 8 and a baffle 4, a round rod 12 is fixedly installed at the outer side of the rectangular block 8, a driving frame 13 for driving the round rod 12 to move in a direction far away from the mounting column 2 is symmetrically arranged at one side of the mounting column 2, a vertical groove is symmetrically formed at one side of the baffle 4 close to the mounting column 2, a screw rod 14 is rotatably installed in the vertical groove, a motor 15 is fixedly installed at the top wall of the vertical groove, an output shaft of the motor 15 is fixedly connected with one end of the screw rod 14, one end of the support 9 is sleeved outside the screw rod 14 in a threaded manner, a pressure sensor 31 is fixedly installed at the top wall of the pipe 1, a controller 32 is fixedly installed at one side of the baffle 4, an alarm 33 is arranged at the outer side of the pipe 1, the controller 32 can control the motor 15, and the controller 32 is a PLC controller.
The pressure sensor 31 detects that the air pressure in the pipeline 1 is increased, the controller 32 is matched to enable the control alarm 33 to alarm, the operator is reminded to repair the filter assembly in the future, meanwhile, the controller 32 controls the motor 15 to start, the screw rod 14 is driven to rotate forwards, the driving support 9 is driven to descend with the rectangular block 8 and the round rod 12, the driving support 13 is matched to drive the round rod 12 to move in the direction away from the mounting column 2, meanwhile, the first spring 11 is compressed to enable the first spring 11 to deform to generate acting force, the rectangular block 8 is driven to move along with the annular pipe 6, the sealing ring 7 can move away from the mounting column 2, then when the sealing ring 7 and the annular pipe 6 are about to be aligned with another filter assembly, the first spring 11 continuously releases the acting force to reset the rectangular block 8, the annular pipe 6 and the sealing ring 7, the final sealing ring 7 is enabled to abut against the surface of the mounting column 2, the controller 32 controls the output shaft of the motor 15 to rotate reversely, combination of the annular pipe 6 and the repaired filter assembly can be achieved through forward and reverse rotation of the output shaft of the motor 15, and switching between the annular pipe 7 and the two filter assemblies can be achieved.
As shown in fig. 5, the driving frame 13 is specifically configured as a plate-shaped member with inclined surfaces symmetrically arranged on one side near the round bar 12, a horizontal section for connecting the two inclined surfaces is arranged between the two inclined surfaces, and the driving frame 13 is fixedly connected with the mounting post 2.
The round bar 12 is pressed when moving along the inclined plane so as to move in a direction away from the mounting column 2, then the round bar 12 is contacted with the horizontal section and does not move in a direction away from the mounting column 2, then the round bar 12 is contacted with the other inclined plane, and at the moment, the rectangular block 8 can move along the round bar 12 and the circular pipe 6 in a direction approaching the mounting column 2 under the action of the first spring 11.
As shown in fig. 3,4 and 7, the suction assembly comprises an annular cylinder 16 fixedly mounted on the inner side of the collar 6, suction holes 17 are formed in the side, close to the mounting column 2, of the annular cylinder 16 in an equidistant and encircling manner, pistons 18 are arranged in the annular cylinder 16, second springs 19 are symmetrically and fixedly mounted on one side, close to the baffle 4, of the pistons 18, one ends, far from the pistons 18, of the second springs 19 are fixedly connected with the inner wall of the annular cylinder 16, first electromagnets 20 are symmetrically and fixedly mounted on the inner wall, far from the mounting column 2, of the annular cylinder 16, one side, close to the first electromagnets 20, of the pistons 18 is made of iron, and the controller 32 can control the first electromagnets 20.
The controller 32 controls the first electromagnet 20 to be electrified to have magnetism, so that the attraction piston 18 moves in a direction away from the attraction hole 17, meanwhile, the second spring 19 is compressed to deform to generate acting force, so that external gas is inhaled into the annular cylinder 16 through the attraction hole 17, the speed of inhaled gas of the piston 18 is higher than the flow speed of gas introduced into the annular tube 6, therefore, the gas continuously introduced into the annular tube 6 can be inhaled, the gas originally existing in the sealing ring 7 can be inhaled, the untreated gas cannot leak outside, when the sealing ring 7 is in contact with the mounting column 2 again, the controller 32 controls the first electromagnet 20 to be powered off, at the moment, the acting force is released by the second spring 19 to reset the piston 18, the gas collected in the annular cylinder 16 is discharged outwards through the attraction hole 17, and the gas is discharged into the filter assembly for filtering.
As shown in fig. 4 and 6, a circular groove corresponding to the suction hole 17 is formed in one side of the piston 18, which is close to the suction hole 17, a cleaning rod 21 is rotatably mounted in the circular groove, the cleaning rod 21 is matched with the suction hole 17 in shape, the cleaning rod 21 is attached to the inner wall of the suction hole 17, one end of the cleaning rod 21 extends out of the suction hole 17, a torsion spring 22 is sleeved outside the cleaning rod 21, two ends of the torsion spring 22 are fixedly connected with the inner wall of the circular groove and the cleaning rod 21 respectively, and a rotation positioning assembly for driving the cleaning rod 21 to rotate and positioning the cleaning rod is arranged outside the cleaning rod 21.
The piston 18 moves to the direction of keeping away from the suction hole 17, the rotation positioning component drives the cleaning rod 21 to rotate at this moment, the torsion spring 22 makes the torsion deformation of the cleaning rod 21 generate acting force, after the piston 18 stops moving, the rotation positioning component positions the cleaning rod 21 so that the cleaning rod 21 cannot rotate, when the piston 18 moves to the direction close to the suction hole 17, impurities attached to the inner wall of the suction hole 17 can be ejected when the cleaning rod 21 passes through the suction hole 17, the rotation positioning component cancels the positioning of the cleaning rod 21, the torsion spring 22 releases the acting force to drive the cleaning rod 21 to rotate rapidly, impurities attached to the cleaning rod 21 during cleaning of the suction hole 17 are thrown out, cleaning of the cleaning rod 21 is achieved, cleaning of the suction hole 17 and cleaning of the cleaning rod 21 are completed, the suction hole 17 cannot be accumulated and blocked by the impurities, air suction efficiency is guaranteed, and when the piston 18 resets, a part of the cleaning rod 21 extends out of the suction hole 17.
As shown in fig. 4, the rotary positioning assembly comprises a mounting groove which is arranged on the piston 18 and is communicated with the circular groove, a take-up reel 23 is fixedly arranged in the middle of one end of the cleaning rod 21, which is far away from the suction hole 17, the take-up reel 23 is positioned in the mounting groove, a wire passing hole which is communicated with the mounting groove is formed in one side of the piston 18, which is close to the suction hole 17, a pull rope 24 is arranged in the wire passing hole, two ends of the pull rope 24 are respectively fixedly connected with the inner wall of the annular cylinder 16 and the take-up reel 23, the pull rope 24 is wound on the take-up reel 23, a shell 25 which corresponds to the take-up reel 23 is fixedly arranged on one side of the piston 18, which is far away from the suction hole 17, a rectangular opening 26 is formed in the middle of one side of the piston 18, and the outer side of the take-up reel 23, an iron plate 27 is slidably arranged in the shell 25, a rectangular column 30 which is matched with the rectangular opening 26 is fixedly arranged at one side of the iron plate 27, a second electromagnet 29 is fixedly arranged on one side of the shell 25, which is far away from the iron plate 27, and the inner wall of the second electromagnet 29 is fixedly connected with the shell 25 through a plurality of third springs 28, and the second electromagnet 29 can be controlled by a controller 32.
When the piston 18 moves to the direction away from the suction hole 17 until the piston cannot move, the controller 32 de-energizes the energized second electromagnet 29 to lose magnetism, the compressed third spring 28 releases the acting force to bring the iron plate 27, the rectangular column 30 moves to the direction close to the rectangular hole 26, the rectangular column 30 is inserted into the rectangular hole 26 of the take-up reel 23, the take-up reel 23 is clamped, the cleaning rod 21 cannot rotate at the moment, when the piston 18 is about to reset, the cleaning rod 21 passes through the suction hole 17 to push out and clean impurities on the inner wall of the cleaning rod 21, then the controller 32 energizes the second electromagnet 29 to have magnetism, the iron plate 27 is attracted to leave the rectangular hole 26 with the rectangular column 30, the iron plate 27 compresses the third spring 28 to deform to generate the acting force, finally the second electromagnet 29 is adsorbed and fixed with the iron plate 27, the torsion spring 22 releases the acting force to quickly rotate the cleaning rod 21, the take-up reel 23 rotates along with the acting force, the loose pull rope 24 is quickly wound, the cleaning rod 21 quickly rotates to push out and throws out the impurities attached to the cleaning rod 21 when the suction hole 17 is about to reset, and the cleaning rod 21 is thrown out.
As shown in fig. 2, the filtering component comprises a cold trap 35 arranged in a threaded port, liquid nitrogen is filled in the cold trap 35, a cylinder 36 is fixedly arranged on one side of the cold trap 35 away from the baffle 4, the cylinder 36 is in threaded connection in the threaded port, and one end of the cylinder 36 is fixedly connected with the connecting pipe 34.
The cold trap 35 can filter corrosive and large-particle impurities in the pipeline, when the cold trap 35 needs to be maintained, the connecting pipe 34 can be separated from the vacuum equipment 37, the connecting pipe 34 is reversely rotated to enable the connecting pipe 34 to rotate with the cylinder 36, so that the cold trap 35 is separated from the mounting column 2, the cold trap 35 needing to be maintained is taken out, and conversely, the cold trap 35 can be mounted back into the mounting column 2 by rotating the connecting pipe 34 positively and rotating the connecting pipe 34 with the cylinder 36.
The invention also provides a method for filtering control by using the vacuum equipment filtering control device, which comprises the following steps:
S1, when the device is used, a pipe for inputting gas is connected with a pipeline 1, the gas enters the pipeline 1, then enters a telescopic pipe 5 and a circular pipe 6 through a port 3, corrosive and large-particle impurities are filtered by a filtering component and then enter a vacuum device 37 through a connecting pipe 34, and the vacuum device 37 can be protected through the filtration of the corrosive and large-particle impurities;
S2, as impurities are more and more filtered, the filter assembly is blocked, the air pressure in the pipeline 1 is increased, at the moment, the control assembly drives the ring pipe 6 to be separated from the mounting column 2 with the sealing ring 7 and move, so that the gas continuously passes through the ring pipe 6 and the gas in the sealing ring 7 is sucked in the whole process, the gas is not leaked in the ring pipe 6 and the area outside the sealing ring 7, the sealing ring 7 is finally in contact with the mounting column 2, the ring pipe 6 is opposite to the position of the other filter assembly, at the moment, the suction assembly works reversely, the sucked gas is discharged, and the gas is discharged after being filtered;
S3, in the whole process, as the sealing ring 7 is not contacted with the mounting column 2 when moving, the sealing ring 7 cannot deform due to friction between the sealing ring 7 and the mounting column 2, after the sealing ring 7 is reset, the sealing ring 7 can keep the original form and the outer side of the mounting column 2 to be in conflict, so that the gas cannot leak when flowing, and in the process of switching the filter assembly, after the sealing ring 7 is separated from the mounting column 2, the gas is continuously inhaled by the inhalation assembly, so that the gas cannot leak outside, the gas cannot leak to the outside when the fault filter assembly is taken out and maintained, and the gas is not required to be suspended in the whole process through switching the filter assembly, so that the uninterrupted gas in the whole process is ensured, and the working efficiency is ensured.
Working principle: when in use, the pipe for inputting gas is connected with the pipeline 1, the gas enters the pipeline 1, then enters the telescopic pipe 5 and the annular pipe 6 through the port 3, corrosive and large-particle impurities are filtered by the filter assembly and then enter the vacuum equipment 37 through the connecting pipe 34, the vacuum equipment 37 can be protected through the filtration of the corrosive and large-particle impurities, the filter assembly is blocked as the impurities are more and more filtered, the air pressure in the pipeline 1 is increased, the air pressure in the pipeline 1 is detected to be increased by the pressure sensor 31, the controller 32 is matched at the moment to control the alarm 33 to alarm, and the staff is reminded to maintain the filter assembly before, Simultaneously, the controller 32 controls the motor 15 to start, so that the screw rod 14 is driven to rotate positively, the driving bracket 9 is driven to descend with the rectangular block 8 and the round rod 12, the round rod 12 is extruded to move away from the mounting column 2 when moving along an inclined plane, the rectangular block 8 is driven to move away from the mounting column 2, meanwhile, the first spring 11 is compressed to deform to generate acting force, the rectangular block 8 is driven to move with the ring pipe 6, so that the sealing ring 7 can move away from the mounting column 2, then the round rod 12 is contacted with the horizontal section, the round rod 12 does not move continuously in a direction away from the mounting column 2, then the round rod 12 is contacted with the other inclined plane, at the moment, under the action of the first spring 11, The rectangular block 8 can move along the round rod 12 and the circular pipe 6 towards the direction close to the mounting column 2, the controller 32 controls the first electromagnet 20 to be electrified to have magnetism when the first motor 15 is started, so that the suction piston 18 moves towards the direction far away from the suction hole 17, and simultaneously the second spring 19 is compressed to deform to generate a force, so that the outside air is sucked into the annular cylinder 16 through the suction hole 17, the speed of the sucked air of the piston 18 is greater than the air flow speed led into the circular pipe 6, thus the continuously-introduced air in the circular pipe 6 can be sucked, and the air originally existing in the sealing ring 7 can be sucked, So that these untreated gases will not leak outside, and eventually the sealing ring 7 will collide with the mounting post 2, the collar 6 will be opposite to the other filter assembly, when the sealing ring 7 again collides with the mounting post 2, the controller 32 will control the first electromagnet 20 to be powered off, and the second spring 19 will release the force to return the piston 18, so that the gas collected in the annular cylinder 16 will be discharged outwards, and the gas will be discharged into the filter assembly through the suction hole 17 for filtration, and during the whole process, since the sealing ring 7 will not contact with the mounting post 2 when moving, the sealing ring 7 will not deform due to friction with the mounting post 2, the sealing ring 7 can still keep the original form and collide with the outer side of the mounting column 2, so that the gas cannot leak in the subsequent process of flowing, and in the process of switching the filter assembly, after the sealing ring 7 is separated from the mounting column 2, the annular cylinder 16 continuously sucks the gas, so that the gas cannot leak outside, and in the subsequent process of taking out and maintaining the failed filter assembly, the gas cannot leak to the outside and be sucked by a human body, and in the process of switching the filter assembly, the gas is not required to be introduced in a pause, the uninterrupted in the whole process is ensured, and the working efficiency is ensured; When the piston 18 moves away from the suction hole 17, the pull rope 24 pulls the take-up reel 23 to rotate with the cleaning rod 21, so that the torsion spring 22 deforms to generate acting force, when the piston 18 moves away from the suction hole 17 to be unable to move, the controller 32 de-energizes the second electromagnet 29 to lose magnetism, the compressed third spring 28 releases acting force to move along with the iron plate 27 and the rectangular column 30 towards the direction close to the rectangular opening 26, so that the rectangular column 30 is inserted into the rectangular opening 26 of the take-up reel 23, so that the take-up reel 23 is clamped, the cleaning rod 21 cannot rotate at the moment, when the piston 18 is about to reset, At this time, the cleaning rod 21 passes through the suction hole 17 to push out and clean impurities on the inner wall of the cleaning rod, then the controller 32 electrifies the second electromagnet 29 to enable the second electromagnet to have magnetism, at this time, the attraction iron plate 27 brings the rectangular column 30 to leave the rectangular opening 26, meanwhile, the iron plate 27 compresses the third spring 28 to deform to generate acting force, finally, the second electromagnet 29 is fixedly adsorbed with the iron plate 27, at this time, the torsion spring 22 releases the acting force to bring the cleaning rod 21 to rotate rapidly, so that the take-up reel 23 rotates accordingly, the loose pull rope 24 is wound rapidly, the cleaning rod 21 rotates rapidly to throw out impurities attached to the cleaning rod 21 when cleaning the suction hole 17, the cleaning of the cleaning rod 21 is achieved, so that the cleaning of the suction hole 17 and the cleaning of the cleaning rod 21 are completed, the suction hole 17 is not blocked by accumulation of impurities, and the gas suction efficiency is guaranteed.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting.