Compressed air self-cleaning type filtering equipment and back flushing method

Abstract

The invention relates to the technical field of filtering devices, and discloses compressed air self-cleaning type filtering equipment and a back flushing method, the compressed air self-cleaning type filtering equipment comprises a filtering unit, and the filtering unit comprises a filtering net; the back flushing unit comprises a main back flushing mechanism and an auxiliary back flushing mechanism, the main back flushing mechanism conducts back flushing on the filter screen through compressor finished product gas, and the auxiliary back flushing mechanism comprises a gas storage tank and an inflation pump and conducts back flushing on the filter screen through gas stored in the gas storage tank; the adjusting unit comprises a control valve and a sealing plate, the adjusting unit further comprises a transmission mechanism, and when the sealing plate rotates, the working state of the control valve is changed through the transmission mechanism. According to the back flushing device, the auxiliary back flushing mechanism is arranged to perform back flushing on the filter screen, when compressed air introduced by the main back flushing mechanism is insufficient, the auxiliary back flushing mechanism is switched, high-pressure air in the air storage tank is utilized to perform back flushing on the filter screen, and the situation that the cleaning effect is poor due to insufficient air pressure is avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of filter device, in particular, relates to compressed air self-cleaning filter equipment and back blowing method. BACKGROUND

[0002] The compressed air self-cleaning filter is widely used in industrial production, and is used for purifying the air entering the air compressor. Its working principle is to periodically clean the filter core by back blowing gas to maintain the filtering efficiency and the stability of the equipment operation. However, the existing compressed air self-cleaning filter usually extracts back blowing gas from the finished product gas of the rear air compressor, and requires that the back blowing gas pressure is not less than 0.4 MPa. When the exhaust pressure of the air compressor is lower than 0.4 MPa, the insufficient pressure of the back blowing gas will cause the following problems: 1. the cleaning effect of the filter core is poor, which affects the filtering efficiency; 2. when the back blowing gas pressure is too low, the cleaning operation of the filter core cannot be completed; 3. long-term use may cause the filter core to be blocked, which increases the maintenance cost and reduces the service life of the equipment. In order to solve the above problems, it is urgent to design a self-cleaning filter system that can adapt to the air compressor with low exhaust pressure.

[0003] The Chinese patent with the authorized announcement number CN201565222U discloses an air filter self-cleaning device. During the interval when the compressor stops working or during the period when the compressor stops working, the air input at the filter end is stopped, and the compressed air remaining in the pipeline or the gas tank is instantaneously introduced for back blowing. The effect of removing various particles and dust on the air filter is best, and the stable output of the compressed air is not affected.

[0004] However, the technical solution still has at least the following defects: in the above-mentioned scheme, only the compressed air remaining in the pipeline or the gas tank is relied on for back blowing, which can compensate for the problem of insufficient back blowing gas pressure, but when the filter is back blown, it does not have the function of vibrating the filter to assist cleaning, and the cleaning effect needs to be improved. In view of this, the present application is proposed. SUMMARY

[0005] To solve the above technical problems, the present application provides a compressed air self-cleaning filter equipment and a back blowing method. The filter screen is back blown by setting a secondary back blowing mechanism. When the compressed air introduced by the primary back blowing mechanism is insufficient, the secondary back blowing mechanism is switched to back blow the filter screen with high-pressure gas in the gas tank, so as to avoid the situation that the cleaning effect is poor due to insufficient gas pressure. Two groups of filter screens are set to filter, and when the air compressor is working, the working state of the two groups of filter screens is switched to ensure that one group of filter screens still works normally during back blowing and cleaning. When both groups of filter screens are back blown and cleaned, the gas flow of the connecting pipe is automatically adjusted to adapt to the increase in the number of filter screens.

[0006] The technical solution adopted by the present application to solve its technical problems is as follows:

[0007] The compressed air self-cleaning filter device comprises:

[0008] The filter unit comprises a filter screen.

[0009] The back flushing unit comprises a main back flushing mechanism and a secondary back flushing mechanism, the main back flushing mechanism back flushes the filter screen with the compressed air product, the secondary back flushing mechanism comprises a gas storage tank and a gas filling pump, and the secondary back flushing mechanism back flushes the filter screen with the gas stored in the gas storage tank.

[0010] The adjusting unit comprises a control valve and a sealing plate, and further comprises a transmission mechanism, the sealing plate rotates to change the working state of the control valve through the transmission mechanism.

[0011] As a preferred embodiment of the present application, the filter unit further comprises a bellows installed on the top of the filter screen, a venturi tube is installed on the top of the bellows, and an air inlet pipe is installed on the top of the venturi tube.

[0012] The back flushing unit further comprises a conveying mechanism, the conveying mechanism comprises a back flushing pipe, one end of the back flushing pipe extends into the air inlet pipe, the control valve is installed on the back flushing pipe, one end of the back flushing pipe is provided with a shunt pipe, one end of the shunt pipe is provided with a connecting pipe, the other end of the back flushing pipe is provided with a sealing assembly, the sealing assembly comprises a back flushing head fixedly installed on the end of the back flushing pipe, a telescopic rod is fixedly installed on the inner wall of the bottom of the back flushing head, a sealing plug is fixedly installed on one end of the telescopic rod, a spring is sleeved on the telescopic rod, and a gas hole is formed in the bottom of the back flushing head.

[0013] As a preferred embodiment of the present application, the main back flushing mechanism comprises a main pipeline, the main pipeline is connected with the connecting pipe, a main electromagnetic valve and a main pressure transmitter are installed on the main pipeline, the secondary back flushing mechanism further comprises a secondary pipeline, one end of the secondary pipeline is connected with the gas storage tank, the other end of the secondary pipeline is connected with the main pipeline, and a secondary electromagnetic valve, a secondary pressure transmitter and a filter device are further installed on the secondary pipeline.

[0014] As a preferred embodiment of the present application, the adjusting unit further comprises a driving mechanism, the driving mechanism comprises a cam, one end of the cam is provided with a rotating shaft, the rotating shaft penetrates through the air inlet pipe and extends into the inside, the sealing plate is located in the inside of the air inlet pipe and is fixedly connected with the rotating shaft, the driving mechanism further comprises a power device, the output end of the power device is provided with a rotating disc, a toothed plate is fixedly installed on the outside of the rotating disc, the other end of the cam is fixedly provided with a toothed ring, and the toothed ring is matched with the toothed plate.

[0015] As a preferred embodiment of the present application, the transmission mechanism comprises a mounting frame, the mounting frame is fixedly connected with the air inlet pipe, the power device is fixedly connected with the mounting frame, a support is movably inserted on the mounting frame, a stop rod is fixedly installed on the support, the stop rod is matched with the control valve so that the stop rod drives the control valve to move when the stop rod moves, a plug rod is movably inserted on the mounting frame, a rotating piece is rotatably installed at the bottom of one end of the plug rod, the rotating piece is movably connected with the support, a push rod is rotatably connected with the bottom of one end of the plug rod, the push rod movably penetrates through the connecting pipe and extends into the inside, a sealing pipe is movably connected in the inside of the connecting pipe, and the sealing pipe is fixedly connected with the push rod.

[0016] As a preferred embodiment of the present application, the vibration unit further comprises a rotating column, a transmission shaft is fixedly installed at the top of the rotating column, a turbine device is installed at the top of the transmission shaft, the turbine device is installed on the back blowing pipe, the turbine device is driven to rotate by the gas to drive the transmission shaft and the rotating column to rotate, a movable piece is sleeved on the transmission shaft, a guide protrusion is installed on one side of the movable piece, a guide groove is formed on the rotating column, and the guide groove is matched with the guide protrusion.

[0017] As a preferred embodiment of the present application, the vibration unit further comprises a fixing plate, the fixing plate is connected with the air inlet pipe, a gas collecting chamber is fixedly installed on one side of the fixing plate, an outer sleeve is movably inserted on the gas collecting chamber, the outer sleeve is connected with the filter screen, lifting rods are fixedly installed on the two sides of the outer sleeve, a fixing sleeve is fixedly installed at the top of the gas collecting chamber, a rotating frame is rotatably installed on the fixing sleeve, a second connecting rod is rotatably installed at one end of the rotating frame, a first connecting rod is rotatably installed at one end of the second connecting rod, and the first connecting rod is fixedly connected with the movable piece.

[0018] As a preferred embodiment of the present application, the vibration unit further comprises a vibration avoiding mechanism, the vibration avoiding mechanism comprises a positioning plate fixedly installed on the fixing plate, a limiting groove and a first recess are formed on the positioning plate, the vibration avoiding mechanism further comprises a swing piece, sliding grooves are formed at the two ends of the swing piece, the sliding grooves are slidably connected with the first connecting rod, a second recess is formed on the swing piece, the swing piece is movably sleeved on the positioning plate through the second recess, a limiting column is installed in the second recess, the limiting column is slidably connected in the limiting groove, a fixing block is further installed in the second recess, and the fixing block is in contact with the inner wall of the first recess when the swing piece is horizontal.

[0019] The back blowing method of the compressed air self-cleaning filter equipment is realized based on the compressed air self-cleaning filter equipment, and comprises the following steps:

[0020] S1, control the power device to work, the power device drives the rotating disc and the gear plate to rotate, so that the corresponding gear ring and the cam rotate, and the cam drives the sealing plate to rotate through the rotating shaft, so that the corresponding air inlet pipe is blocked and cannot normally intake air;

[0021] S2, the cam abuts against the corresponding support and moves, the support drives the blocking rod to move in the process of moving, so as to drive the control valve to open, and the support drives the rotating part to deflect in the process of moving, so as to drive the inserting rod to move, the inserting rod drives the push rod to move, so as to drive the sealing pipe to move;

[0022] S3, the shunt pipe is communicated with the connecting pipe, the finished product compressed air of the air compressor is introduced through the main pipeline, so that the finished product compressed air enters the connecting pipe and the shunt pipe, and enters the back blowing head through the back blowing pipe, the gas blows open the sealing plug, and is sprayed out through the air hole, so as to back blow and clean the filter screen;

[0023] S4, when the pressure of the main pipeline is detected to be insufficient through the main pressure transmitter, the opening and closing of the main electromagnetic valve and the auxiliary electromagnetic valve are controlled to switch the pipeline, so that the high-pressure gas in the gas storage tank enters the connecting pipe through the auxiliary pipeline, so as to ensure that the back blowing gas provided for the filter screen has sufficient gas pressure.

[0024] As a preferred embodiment of the present application, the back blowing method of the compressed air self-cleaning filter equipment further comprises the following steps:

[0025] S5, when the air compressor stops working, the two cams are driven to rotate by controlling the power device, and the two sealing plates are driven to block the air inlet pipe together, at this time, the supports on both sides are driven to move under the action of the cams, the rotating part is driven to move as a whole under the pushing of the supports on both sides, and the push rod is driven to move, so that the blocking area of the sealing pipe is reduced, and the passing amount of gas is increased;

[0026] S6, when the gas passes through the back blowing pipe, the gas flow drives the turbine device to rotate, the turbine device drives the transmission shaft to rotate, the transmission shaft drives the rotating column to rotate, the rotating column drives the movable part to move up and down through the guide groove and the guide protrusion, the movable part drives the first connecting rod to move up and down, the first connecting rod drives the rotating frame to swing through the second connecting rod, and drives the lifting rod to vibrate up and down, so that the outer sleeve shell and the filter screen vibrate;

[0027] S7, the first connecting rod moves up and down while driving one end of the swing part to move, when the first connecting rods on both sides move synchronously, the line connecting the two first connecting rods is in a horizontal position, at this time, the swing part is in a horizontal position, the fixed block on the swing part abuts against the inner wall of the first groove, so as to obtain friction, so that the stress on both sides of the swing part is unbalanced, so as to break the horizontal state of the swing part and avoid the synchronous movement of the first connecting rod.

[0028] Compared with the prior art, the present application has the following beneficial effects:

[0029] The present application carries out back flushing to the filter screen through the setting of the secondary back flushing mechanism, when the compressed air introduced by the primary back flushing mechanism is insufficient, the secondary back flushing mechanism is switched, and the high pressure gas in the gas storage tank is used to back flush the filter screen, so that the poor cleaning effect caused by insufficient air pressure is avoided;

[0030] The present application carries out filtering through the setting of two groups of filter screens, and when the air compressor is working, the working state of the two groups of filter screens is switched to ensure that one group of filter screen still works normally during back flushing cleaning, and when both groups of filter screens carry out back flushing cleaning, the gas flow of the connecting pipe is automatically adjusted to adapt to the increase of the number of filter screens;

[0031] The present application carries out filtering through the setting of two groups of filter screens, and when the air compressor is working, the working state of the two groups of filter screens is switched to ensure that one group of filter screen still works normally during back flushing cleaning, and when both groups of filter screens carry out back flushing cleaning, the gas flow of the connecting pipe is automatically adjusted to adapt to the increase of the number of filter screens; BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a structure schematic view of the compressed air self-cleaning filter equipment of the present application;

[0033] Figure 2 It is a structure schematic view of the inside of the back flushing pipe of the present application;

[0034] Figure 3 It is a structure schematic view of the plug rod of the present application;

[0035] Figure 4 It is a structure schematic view of the inside of the air inlet pipe of the present application;

[0036] Figure 5 It is a structure schematic view of the sealing plate of the present application;

[0037] Figure 6 It is a structure schematic view of the cam of the present application;

[0038] Figure 7 It is a structure schematic view of the inside of the back flushing head of the present application;

[0039] Figure 8 It is a structure schematic view of the explosion of the rotating column of the present application;

[0040] Figure 9 It is a structure schematic view of the rotating frame of the present application;

[0041] Figure 10 It is a structure schematic view of the positioning plate of the present application;

[0042] Figure 11 It is a structure schematic view of the fixed block of the present application.

[0043] REFERENCE SIGNS:

[0044] 100, air inlet pipe; 101, venturi; 102, corrugated pipe; 103, air collecting chamber; 104, outer shell; 105, filter screen;

[0045] 200, back flushing pipe; 201, control valve; 202, shunt pipe; 203, connecting pipe; 204, main pipe; 205, main electromagnetic valve; 206, main pressure transmitter; 207, auxiliary pipe; 208, gas storage tank; 209, air charging pump; 210, auxiliary pressure transmitter; 211, auxiliary electromagnetic valve; 212, filtering device; 213, back flushing head; 214, telescopic rod; 215, sealing plug; 216, spring; 217, air hole;

[0046] 300, sealing plate; 301, rotating shaft; 302, cam; 303, toothed ring; 304, power device; 305, rotating disc; 306, toothed plate;

[0047] 400, mounting frame; 401, support; 402, blocking rod; 403, rotating member; 404, insertion rod; 405, push rod; 406, sealing pipe;

[0048] 500, fixed plate; 501, transmission shaft; 502, turbine device; 503, rotating column; 504, guide groove; 505, movable member; 506, guide protrusion; 507, first connecting rod; 508, second connecting rod; 509, rotating frame; 510, fixed sleeve; 511, lifting rod;

[0049] 600, positioning plate; 601, limiting groove; 602, first recess; 603, swinging member; 604, sliding groove; 605, second recess; 606, limiting column; 607, fixed block. DETAILED DESCRIPTION

[0050] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application.

[0051] Embodiment 1

[0052] As shown in the drawings, the compressed air self-cleaning filter device comprises: Figures 1 to 11 The filtering unit comprises filter screens 105, and two filtering units are arranged to switch during the operation of the air compressor, so that the operation of the air compressor is not affected during the back flushing cleaning process.

[0053]

[0054] ​The back flushing unit comprises a main back flushing mechanism and a secondary back flushing mechanism. The main back flushing mechanism uses the compressed air to back flush the filter screen 105. The secondary back flushing mechanism comprises a gas storage tank 208 and a gas charging pump 209. The secondary back flushing mechanism uses the gas stored in the gas storage tank 208 to back flush the filter screen 105.

[0055] The adjusting unit comprises a control valve 201 and a sealing plate 300. The adjusting unit further comprises a transmission mechanism. When the sealing plate 300 rotates, the transmission mechanism changes the working state of the control valve 201.

[0056] As shown in Figure 1 , Figure 4 , Figure 7 In the embodiment, the filter unit further comprises a bellows 102 installed on the top of the filter screen 105. A venturi 101 is installed on the top of the bellows 102. An air inlet pipe 100 is installed on the top of the venturi 101.

[0057] The back flushing unit further comprises a conveying mechanism. The conveying mechanism comprises a back flushing pipe 200. One end of the back flushing pipe 200 extends into the air inlet pipe 100. The control valve 201 is installed on the back flushing pipe 200. One end of the back flushing pipe 200 is provided with a shunt pipe 202. One end of the shunt pipe 202 is provided with a connecting pipe 203. The other end of the back flushing pipe 200 is provided with a sealing assembly. The sealing assembly comprises a back flushing head 213 fixedly installed on the end of the back flushing pipe 200. A telescopic rod 214 is fixedly installed on the inner wall of the bottom of the back flushing head 213. A sealing plug 215 is fixedly installed on one end of the telescopic rod 214. A spring 216 is sleeved on the telescopic rod 214. A gas hole 217 is formed on the bottom of the back flushing head 213. In the present arrangement, when the back flushing pipe 200 is not working, the spring 216 acts on the sealing plug 215 to seal the back flushing pipe 200, so that the air sucked into the air inlet pipe 100 does not enter the back flushing pipe 200 when the air compressor is working.

[0058] As shown in Figure 1 Further, the main back flushing mechanism comprises a main pipe 204. The main pipe 204 is connected with the connecting pipe 203. The main pipe 204 is provided with a main electromagnetic valve 205 and a main pressure transmitter 206. The secondary back flushing mechanism further comprises a secondary pipe 207. One end of the secondary pipe 207 is connected with the gas storage tank 208. The other end of the secondary pipe 207 is connected with the main pipe 204. The secondary pipe 207 is further provided with a secondary electromagnetic valve 211, a secondary pressure transmitter 210 and a filtering device 212. In the present arrangement, the air introduced by the main pipe 204 is the finished air of the air compressor, which has been filtered and does not need to be filtered again. The air introduced by the secondary pipe 207 is the air of the gas storage tank 208, which needs to be filtered by the filtering device 212. A differential pressure transmitter is arranged at the filter screen 105 to detect the pressure difference between the two sides of the filter screen 105, so as to determine the blockage of the filter screen 105.

[0059] Example 2

[0060] like Figures 5 to 6 As shown, in a specific embodiment, the adjustment unit further includes a drive mechanism, which includes a cam 302. A rotating shaft 301 is mounted on one end of the cam 302, passing through the intake pipe 100 and extending into it. A sealing plate 300 is located inside the intake pipe 100 and is fixedly connected to the rotating shaft 301. The drive mechanism also includes a power unit 304. A turntable 305 is mounted on the output end of the power unit 304. A toothed plate 306 is fixedly mounted on the outer side of the turntable 305. A toothed ring 303 is fixedly mounted on the other end of the cam 302, and the toothed ring 303 is adapted to the toothed plate 306. In this configuration, the toothed plate 306 is a slightly curved shape that fits against the outer side of the turntable 305. When the turntable 305 and the toothed plate 306 rotate one revolution, the cam 302 and the toothed ring 303 only rotate ninety degrees under the action of meshing. By controlling the forward and reverse rotation of the turntable 305 and the toothed plate 306, the cam 302 and the toothed ring 303 can be rotated to different positions.

[0061] like Figures 2 to 5 As shown, the transmission mechanism further includes a mounting bracket 400, which is fixedly connected to the intake pipe 100. The power unit 304 is fixedly connected to the mounting bracket 400. A bracket 401 is movably inserted into the mounting bracket 400. A stop lever 402 is fixedly installed on the bracket 401. The stop lever 402 is adapted to the control valve 201 so that the control valve 201 can be actuated when the stop lever 402 moves. A plug rod 404 is also movably inserted into the mounting bracket 400. A rotating part 403 is rotatably installed at the bottom of one end of the plug rod 404. The rotating part 403 is movably connected to the bracket 401. A push rod 405 is also rotatably connected at the bottom of one end of the plug rod 404. The push rod 405 movably passes through the connecting pipe 203 and extends into the interior. A sealing pipe 406 is movably connected inside the connecting pipe 203. The sealing pipe 406 is fixedly connected to the push rod 405. In this configuration, when only one side of the bracket 401 moves, only one end of the rotating member 403 moves accordingly, and the distance the middle position moves is half the distance the end moves. When both sides of the bracket 401 move together, the distance the middle position moves is the same as the distance the end moves.

[0062] Example 3

[0063] like Figure 4 , Figures 8 to 9As shown in the specific embodiment, the compressed air self-cleaning filter device further comprises a vibration unit, the vibration unit comprises a rotating column 503, a transmission shaft 501 is fixedly installed at the top of the rotating column 503, a turbine device 502 is installed at the top of the transmission shaft 501, the turbine device 502 is installed on the back blowing pipe 200, the turbine device 502 is driven to rotate by the back blowing pipe 200 when gas passes through to drive the transmission shaft 501 and the rotating column 503 to rotate, a movable piece 505 is sleeved on the transmission shaft 501, a guide protrusion 506 is installed on one side of the movable piece 505, a guide groove 504 is formed on the rotating column 503, and the guide groove 504 is matched with the guide protrusion 506. In the present arrangement, the guide groove 504 comprises a rising section and a fault section, when the guide protrusion 506 is in the rising section, the movable piece 505 is driven to rise, and when it moves to the fault section, it is lowered under the action of gravity.

[0064] As shown in the specific embodiment, the compressed air self-cleaning filter device further comprises a vibration unit, the vibration unit comprises a rotating column 503, a transmission shaft 501 is fixedly installed at the top of the rotating column 503, a turbine device 502 is installed at the top of the transmission shaft 501, the turbine device 502 is installed on the back blowing pipe 200, the turbine device 502 is driven to rotate by the back blowing pipe 200 when gas passes through to drive the transmission shaft 501 and the rotating column 503 to rotate, a movable piece 505 is sleeved on the transmission shaft 501, a guide protrusion 506 is installed on one side of the movable piece 505, a guide groove 504 is formed on the rotating column 503, and the guide groove 504 is matched with the guide protrusion 506. In the present arrangement, the guide groove 504 comprises a rising section and a fault section, when the guide protrusion 506 is in the rising section, the movable piece 505 is driven to rise, and when it moves to the fault section, it is lowered under the action of gravity. Figures 8 to 9 As shown in the specific embodiment, the compressed air self-cleaning filter device further comprises a vibration unit, the vibration unit comprises a rotating column 503, a transmission shaft 501 is fixedly installed at the top of the rotating column 503, a turbine device 502 is installed at the top of the transmission shaft 501, the turbine device 502 is installed on the back blowing pipe 200, the turbine device 502 is driven to rotate by the back blowing pipe 200 when gas passes through to drive the transmission shaft 501 and the rotating column 503 to rotate, a movable piece 505 is sleeved on the transmission shaft 501, a guide protrusion 506 is installed on one side of the movable piece 505, a guide groove 504 is formed on the rotating column 503, and the guide groove 504 is matched with the guide protrusion 506. In the present arrangement, the guide groove 504 comprises a rising section and a fault section, when the guide protrusion 506 is in the rising section, the movable piece 505 is driven to rise, and when it moves to the fault section, it is lowered under the action of gravity.

[0065] Figures 10 to 11 ​As shown, further, the vibration unit further comprises a vibration-avoiding mechanism, the vibration-avoiding mechanism comprising a positioning plate 600 fixedly installed on the fixed plate 500, the positioning plate 600 being provided with a limiting groove 601 and a first recess 602, the vibration-avoiding mechanism further comprising a swing piece 603, the swing piece 603 being provided with a sliding groove 604 at two ends, the sliding groove 604 being slidably connected with the first connecting rod 507, the swing piece 603 being provided with a second recess 605, the swing piece 603 being movably sleeved on the positioning plate 600 through the second recess 605, the second recess 605 being internally provided with a limiting column 606, the limiting column 606 being slidably connected in the limiting groove 601, the second recess 605 further being internally provided with a fixed block 607, the fixed block 607 being in contact with the inner wall of the first recess 602 when the swing piece 603 is horizontal. In the present arrangement, the fixed block 607 is provided with a rubber pad on one side, and when the swing piece 603 is horizontal, the rubber pad slightly extrudes the inner wall of the first recess 602 to obtain frictional force, and the limiting groove 601 and the limiting column 606 can make the positioning plate 600 always be in the middle position of the swing piece 603.

[0066] The back-blowing method of the compressed air self-cleaning filter device is realized based on the compressed air self-cleaning filter device, and comprises the following steps: when back-blowing cleaning is performed, the finished compressed air of the air compressor is introduced through the main pipeline 204 and enters the connecting pipeline 203; when one of the filter screens 105 needs to be cleaned, the power device 304 is controlled to work, the power device 304 drives the rotating disc 305 and the toothed plate 306 to rotate, so that the corresponding toothed ring 303 and the cam 302 rotate, and the cam 302 drives the sealing plate 300 to rotate through the rotating shaft 301, so that the corresponding air inlet pipe 100 is blocked and cannot normally intake air; the cam 302 abuts against the corresponding support 401 and moves the support 401; the support 401 drives the blocking rod 402 to move in the process of moving, so as to drive the control valve 201 to open; the support 401 drives the rotating piece 403 to deflect in the process of moving, so as to drive the inserting rod 404 to move; the inserting rod 404 drives the push rod 405 to move, so as to drive the sealing pipe 406 to move; at this time, the shunt pipe 202 is communicated with the connecting pipeline 203, the gas enters the shunt pipe 202, and then enters the back-blowing head 213 through the back-blowing pipe 200; the gas pushes away the sealing plug 215 and is sprayed out through the air hole 217, so as to back-blow and clean the filter screen 105.

[0067] When the pressure of the main pipeline 204 is insufficient through the main pressure transmitter 206, the pipeline is switched by controlling the opening and closing of the main electromagnetic valve 205 and the auxiliary electromagnetic valve 211, so that the high-pressure gas in the gas storage tank 208 enters the connecting pipeline 203 through the auxiliary pipeline 207, so as to ensure that the back-blowing gas provided for the filter screen 105 has sufficient gas pressure.

[0068] When the air compressor stops working, the two cams 302 can be rotated by controlling the power device 304 to drive the two sealing plates 300 to seal the air inlet pipe 100, at this time, the two side supports 401 are moved under the action of the cam 302, the rotating part 403 is moved as a whole after being pushed by the two side supports 401, and the push rod 405 is moved, and compared with the push rod 405 pushed by only one side support 401, the moving distance of the push rod 405 is larger, so that the moving distance of the sealing pipe 406 is larger, thereby reducing the sealing area of the sealing pipe 406 and increasing the passing amount of gas;

[0069] When the gas passes through the back flushing pipe 200, the gas flow drives the turbine device 502 to rotate, the turbine device 502 drives the transmission shaft 501 to rotate, the transmission shaft 501 drives the rotating column 503 to rotate, the rotating column 503 drives the movable part 505 to move up and down through the guide groove 504 and the guide protrusion 506, the movable part 505 drives the first connecting rod 507 to move up and down, the first connecting rod 507 drives the rotating frame 509 to swing through the second connecting rod 508, and drives the lifting rod 511 to vibrate up and down, so that the outer shell 104 and the filter screen 105 vibrate;

[0070] The first connecting rod 507 moves up and down to drive one end of the swing part 603 to move, when the two first connecting rods 507 move synchronously, the line between the two first connecting rods 507 is in a horizontal position, at this time, the swing part 603 is in a horizontal position, the fixed block 607 on the swing part 603 abuts against the inner wall of the first groove 602 to obtain friction force, so that the stress on both sides of the swing part 603 is unbalanced, so as to break the horizontal state of the swing part 603, avoid synchronous movement of the first connecting rod 507, and prevent damage caused by resonance, when the two first connecting rods 507 move asynchronously, the swing part 603 is in an inclined state, at this time, the fixed block 607 does not contact the first groove 602, and the two first connecting rods 507 normally move.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. Compressed air self-cleaning filter device, characterized in that, The utility model relates to a filter device for compressed air, which comprises: a filtering unit comprising a filter screen (105); a back flushing unit comprising a main back flushing mechanism and a secondary back flushing mechanism, the main back flushing mechanism back flushing the filter screen (105) with compressed air product, the secondary back flushing mechanism comprising a gas storage tank (208) and a gas filling pump (209), the secondary back flushing mechanism back flushing the filter screen (105) with gas stored in the gas storage tank (208); an adjusting unit comprising a control valve (201) and a sealing plate (300), the adjusting unit further comprising a transmission mechanism, the sealing plate (300) changing the working state of the control valve (201) through the transmission mechanism when rotating.

2. The compressed air self-cleaning filter apparatus according to claim 1, characterized in that, The filtering unit further comprises a bellows (102) installed on the top of the filter screen (105), a venturi (101) installed on the top of the bellows (102), and an air inlet pipe (100) installed on the top of the venturi (101); The back flushing unit further comprises a conveying mechanism comprising a back flushing pipe (200), one end of the back flushing pipe (200) extending into the air inlet pipe (100), the control valve (201) installed on the back flushing pipe (200), a shunt pipe (202) installed on one end of the back flushing pipe (200), a connecting pipe (203) installed on one end of the shunt pipe (202), and a sealing assembly provided on the other end of the back flushing pipe (200), the sealing assembly comprising a back flushing head (213) fixedly installed on the end of the back flushing pipe (200), a telescopic rod (214) fixedly installed on the inner wall bottom of the back flushing head (213), a sealing plug (215) fixedly installed on one end of the telescopic rod (214), a spring (216) sleeved on the telescopic rod (214), and a gas hole (217) formed on the bottom of the back flushing head (213).

3. The compressed air self-cleaning filter apparatus according to claim 2, characterized in that, The main back flushing mechanism comprises a main pipeline (204) connected with the connecting pipe (203), the main pipeline (204) being provided with a main electromagnetic valve (205) and a main pressure transmitter (206), the secondary back flushing mechanism further comprising a secondary pipeline (207), one end of the secondary pipeline (207) being connected with the gas storage tank (208) and the other end being connected with the main pipeline (204), the secondary pipeline (207) being further provided with a secondary electromagnetic valve (211), a secondary pressure transmitter (210), and a filtering device (212).

4. The compressed air self-cleaning filter apparatus according to claim 3, characterized in that, The adjusting unit further comprises a driving mechanism, the driving mechanism comprises a cam (302), one end of the cam (302) is provided with a rotating shaft (301), the rotating shaft (301) penetrates through the air inlet pipe (100) and extends to the inside, the sealing plate (300) is located in the inside of the air inlet pipe (100) and is fixedly connected with the rotating shaft (301), the driving mechanism further comprises a power device (304), the power device (304) is provided with a rotating disc (305) at the output end, the outer side of the rotating disc (305) is fixedly provided with a toothed plate (306), the other end of the cam (302) is fixedly provided with a toothed ring (303), and the toothed ring (303) is matched with the toothed plate (306).

5. The compressed air self-cleaning filter apparatus according to claim 4, characterized in that, The transmission mechanism comprises a mounting frame (400), the mounting frame (400) is fixedly connected with the air inlet pipe (100), the power device (304) is fixedly connected with the mounting frame (400), the mounting frame (400) is movably inserted with a support (401), the support (401) is fixedly provided with a blocking rod (402), the blocking rod (402) is matched with the control valve (201) so that the blocking rod (402) drives the control valve (201) to move when the blocking rod (402) moves, the mounting frame (400) is further movably inserted with a plug rod (404), one end of the plug rod (404) is rotatably provided with a rotating piece (403), the rotating piece (403) is movably connected with the support (401), and one end of the plug rod (404) is further rotatably connected with a push rod (405), the push rod (405) movably penetrates through the connecting pipe (203) and extends to the inside, the connecting pipe (203) is movably connected with a sealing pipe (406), and the sealing pipe (406) is fixedly connected with the push rod (405).

6. The compressed air self-cleaning filter apparatus according to claim 5, characterized in that, Further comprising a vibration unit, the vibration unit comprises a rotating column (503), the top of the rotating column (503) is fixedly provided with a transmission shaft (501), the top of the transmission shaft (501) is provided with a turbine device (502), the turbine device (502) is installed on the back blowing pipe (200), the back blowing pipe (200) drives the turbine device (502) to rotate when passing through the gas, so as to drive the transmission shaft (501) and the rotating column (503) to rotate, the transmission shaft (501) is sleeved with a movable piece (505), one side of the movable piece (505) is provided with a guide protrusion (506), the rotating column (503) is provided with a guide groove (504), and the guide groove (504) is matched with the guide protrusion (506).

7. The compressed air self-cleaning filter apparatus according to claim 6, characterized in that, The vibration unit further comprises a fixing plate (500) connected with the air inlet pipe (100), one side of the fixing plate (500) is fixedly provided with a gas collecting chamber (103), the gas collecting chamber (103) is movably connected with an outer sleeve (104), the outer sleeve (104) is connected with a filter screen (105), both sides of the outer sleeve (104) are fixedly provided with lifting rods (511), the top of the gas collecting chamber (103) is fixedly provided with a fixing sleeve (510), the fixing sleeve (510) is rotatably provided with a rotating frame (509), one end of the rotating frame (509) is rotatably provided with a second connecting rod (508), one end of the second connecting rod (508) is rotatably provided with a first connecting rod (507), and the first connecting rod (507) is fixedly connected with a movable element (505).

8. The compressed air self-cleaning filter apparatus according to claim 7, characterized in that, The vibration unit further comprises a vibration avoidance mechanism, the vibration avoidance mechanism comprises a positioning plate (600) fixedly installed on the fixing plate (500), the positioning plate (600) is provided with a limiting groove (601) and a first groove (602), the vibration avoidance mechanism further comprises a swing element (603), both ends of the swing element (603) are provided with sliding grooves (604), the sliding grooves (604) are slidably connected with the first connecting rod (507), the swing element (603) is provided with a second groove (605), the swing element (603) is movably sleeved on the positioning plate (600) through the second groove (605), a limiting column (606) is installed in the second groove (605), the limiting column (606) is slidably connected in the limiting groove (601), and a fixed block (607) is further installed in the second groove (605).

9. Blowback method for compressed air self-cleaning filter devices, implemented on the basis of the compressed air self-cleaning filter device according to claim 8, characterized in that, The method comprises the following steps: S1, controlling the power device (304) to work, the power device (304) drives the rotating disc (305) and the toothed plate (306) to rotate, so that the corresponding tooth ring (303) and the cam (302) rotate, and the cam (302) drives the sealing plate (300) to rotate through the rotating shaft (301), so that the corresponding air inlet pipe (100) is blocked and cannot normally inhale air; S2, the cam (302) abuts against the corresponding support (401) and moves, the support (401) moves and drives the blocking rod (402) to move, so as to drive the control valve (201) to open, and the support (401) moves and drives the rotating element (403) to deflect, so as to move the inserting rod (404), the inserting rod (404) drives the push rod (405) to move, so as to move the pipe sealing device (406); S3, the shunt pipe (202) and the connecting pipe (203) communicate, the finished product compressed air of the air compressor is introduced through the main pipeline (204), so that it enters the connecting pipe (203) and the shunt pipe (202), and enters the back blowing head (213) through the back blowing pipe (200), the gas blows off the sealing plug (215), and is sprayed out through the air hole (217), so as to back blow and clean the filter screen (105); S4, when the pressure of the main pipeline (204) is insufficient through the main pressure transmitter (206), the opening and closing of the main electromagnetic valve (205) and the auxiliary electromagnetic valve (211) are controlled to switch the pipeline, so that the high-pressure gas in the gas storage tank (208) enters the connecting pipe (203) through the auxiliary pipeline (207), so as to ensure that the back blowing gas provided for the filter screen (105) has sufficient gas pressure.

10. The blowback method of compressed air self-cleaning filter apparatus according to claim 9, characterized in that, Further comprising the following steps: S5, when the air compressor stops working, the two cams (302) are rotated and drive the two sealing plates (300) to block the air inlet pipe (100) together, at this time, the supports (401) on both sides are moved under the action of the cams (302), the rotating member (403) is moved as a whole after being pushed by the supports (401) on both sides, and the push rod (405) is moved, so that the blocking area of the sealing pipe (406) is reduced, and the passing amount of gas is increased; S6, when the gas passes through the back blowing pipe (200), it will pass through the turbine device (502), the airflow drives the turbine device (502) to rotate, the turbine device (502) drives the transmission shaft (501) to rotate, the transmission shaft (501) drives the rotating column (503) to rotate, the rotating column (503) drives the movable member (505) to move up and down through the guide groove (504) and the guide protrusion (506), the movable member (505) drives the first connecting rod (507) to move up and down, the first connecting rod (507) drives the rotating frame (509) to swing through the second connecting rod (508), and drives the lifting rod (511) to vibrate up and down, so that the outer shell (104) and the filter screen (105) vibrate; S7, the first connecting rod (507) moves up and down at the same time, and drives one end of the swing member (603) to move, when the first connecting rods (507) on both sides move synchronously, the line between them is in a horizontal position, at this time, the swing member (603) is in a horizontal position, the fixed block (607) on the swing member (603) abuts against the inner wall of the first groove (602), so as to obtain friction force, so that the stress on both sides of the swing member (603) is unbalanced, so as to break the horizontal state, and avoid the synchronous movement of the first connecting rod (507).

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