Automatic sealing and dust removing device

Abstract

According to the automatic sealing dust removal device, a piston pipe comprises a piston part and a connecting part which are integrated, a sealing cover can be installed at the lower end of the piston pipe through a screw or a rivet, connection is convenient, the complex process for connecting the piston pipe and the sealing cover is reduced, and the piston part at the upper end of the piston pipe can be well inserted into an outer sleeve to be matched; the pressure of gas input into the outer sleeve for pushing the piston cover can be close to the pressure intensity of gas input into the gas inlet rod, the opening in the upper end of the filter cartridge can be better sealed when the sealing cover moves downwards, rigid friction and abrasion of the piston part moving in the outer sleeve can be reduced after long-term use, abrasion is less in the use process, and the service life of the filter cartridge is prolonged. Compared with the prior art, the sealing device is better in air tightness and longer in service life, so that the sealing device is simple in process and low in manufacturing cost, the combination of the straight nozzle and the inclined nozzle is arranged in the air injection pipe of the rotary air injection device, air can be efficiently injected to clean powder and dust in the filter membrane, and the cleaning effect is good.

Description

Technical Field

[0001] The utility model relates to the fields of spraying, polishing, dust removal, etc., and specifically relates to an automatic sealing and dust removal device. Background Art

[0002] In the powder spraying / polishing process of hardware parts, an air extraction filter cylinder is required. The upper end of the filter cylinder is installed in the negative pressure chamber, and the lower end is in the spraying chamber. An air extraction mechanism is arranged in the negative pressure chamber. The upper opening of the filter cylinder is extracted by an air extraction fan, and the air flow in the powder spraying chamber will flow towards the periphery of the filter cylinder and then flow out from the opening. During the powder spraying process, the excess splashed powder will gather around the filter cylinder along with the air flow and precipitate around the lower part of the filter cylinder. There will also be more powder and dust adsorbed on the filter membrane of the filter cylinder. After a period of use, there will be more powder and dust adsorbed on the filter membrane of the filter cylinder, blocking the entire filter cylinder, affecting the air flow passing through the filter cylinder, and unable to achieve the effect of air extraction and filtration. A jet device can be arranged in the filter cylinder in cooperation with a sealing device. The jet device blows air in the filter cylinder to blow the powder and dust attached to the filter cylinder in the reverse direction, and the cleaning of the filter cylinder can be completed. When blowing air, the sealing device needs to seal the upper opening of the filter cylinder before blowing air, so that the pressure in the filter cylinder can increase, and the powder and dust attached to the filter membrane can be better blown in the reverse direction. The existing sealing device is usually composed of an outer sleeve made of metal and a piston. The lower part of the piston is connected to the sealing cover through an inner sleeve. When gas is input into the air inlet rod, the gas will enter the outer sleeve through the air holes and push the piston. The piston drives the sealing cover to move downward to seal the upper opening of the filter cylinder. Since the sealing cover, outer sleeve, and piston are all made of metal, the manufacturing process is complex, troublesome, and costly. It is difficult to control the accuracy of the piston in the outer sleeve, the airtightness is not good enough, the pressure for sealing the upper opening of the filter cylinder is small, and the opening cannot be sealed well. When the jet device in the filter cylinder sprays gas to clean the powder and dust in the filter membrane, the effect is not good enough. If the airtightness between the piston and the outer sleeve is to be improved, additional fine machining processes of the piston are required, which is costly. In addition, the connection between the upper end of the existing inner sleeve and the piston (welding) is troublesome, and the connection between the lower end of the inner sleeve and the sealing cover is also troublesome to weld, resulting in high costs and inconvenient assembly. It is necessary to improve the spraying and cleaning effect and sealing effect of the rotary jet device to better clean the filter membrane. Summary of the Invention

[0003] As described in the background art above, the manufacturing process of the outer sleeve and the piston of the existing sealing device is complex, troublesome, and costly. It is difficult to control the precision of the piston inside the outer sleeve, the airtightness is not good enough, the pressure for sealing the opening at the upper end of the filter cartridge is small, and it is unable to seal the opening well. In addition, the effect of the rotating jet device in jetting gas to clean the powder and dust in the filter membrane is not good, and there are deficiencies. The present utility model provides an automatic sealing and dust removal device. The piston tube includes a piston part and a connecting part integrated as a whole. The sealing cover can be installed at the lower end of the piston tube by screws or rivets, which is convenient for connection and reduces the complex process of connecting the piston tube and the sealing cover. The piston part at the upper end of the piston tube can also be better inserted into the outer sleeve for cooperation. The pressure of the gas input into the outer sleeve to push the piston cover can be close to the pressure intensity of the gas input into the intake rod. When the sealing cover moves downward, it can better seal the opening at the upper end of the filter cartridge. Long-term use can also reduce the rigid friction and wear of the piston part moving in the outer sleeve, with less wear during use, better airtightness, and longer service life. This makes the process of the sealing device simple, with low manufacturing cost. The spray pipe of the rotating jet device is provided with a combination of a direct spray port and an inclined spray port, which can efficiently spray gas to clean the powder and dust in the filter membrane, with good cleaning effect.

[0004] The technical solution adopted by the present utility model to solve the technical problem is: an automatic sealing and dust removal device, including an outer sleeve, a piston tube, a sealing cover, and an intake rod. An intake rod is arranged in the central hole of the outer sleeve, and the intake rod is provided with air holes for blowing air into the outer sleeve. A piston tube is arranged inside the outer sleeve. The piston tube is an integrated component, with the upper end being the piston part and the lower end being the connecting part. The piston tube and the piston part can be inserted into the outer sleeve for movement. The connecting part of the piston tube can be connected to the sealing cover as a whole. When the air holes of the intake rod jet air, the gas enters the outer sleeve and pushes the piston cover and the inner sleeve downward. The downward movement of the inner sleeve drives the sealing cover connected as a whole to move downward.

[0005] The piston tube is provided with a hole center that cooperates with the intake rod, and the intake rod can pass through the hole center of the piston tube. The piston tube can slide upward or downward in the center of the outer sleeve with the intake rod as a guide.

[0006] The connecting part of the piston tube and the sealing cover are fixedly connected as a whole by screws or by rivets.

[0007] The lower end surface of the connecting part of the piston tube is a smooth plane, which can better cooperate and connect with the upper end surface of the sealing cover to avoid easy air leakage at the connection.

[0008] The piston tube is made of plastic material. A number of reinforcing ribs are provided between the piston part and the connecting part. The reinforcing ribs make the overall strength of the piston tube better, so that it will not deform when stressed. In addition, the plastic piston tube is simple and convenient in the manufacturing process and can be quickly produced and manufactured through an injection mold.

[0009] The piston tube can be any one of nylon, ABS plastic, PP plastic, PI or a mixed plastic of other materials.

[0010] The outer circumferential surface of the piston part of the piston tube is a smooth surface, and the frictional resistance generated when the piston part moves inside the outer sleeve is smaller.

[0011] A sunk part is provided on the upper end surface of the piston part of the piston tube, which can better push the piston part to move when gas is input into the outer sleeve.

[0012] The outer sleeve is made of metal material and can be stainless steel. The plastic piston tube made of plastic material cooperates with the metal outer sleeve. When the plastic piston part moves inside the outer sleeve, it can reduce rigid friction and wear, with less wear during use, better airtightness, and longer service life.

[0013] The upper end of the air inlet rod is provided with threads. Through the cooperation connection of the nut and the threads, the air inlet rod and the outer sleeve can be fixed at the center of the support frame. The support frame supports the entire sealing device. The upper end opening of the air inlet rod can be connected to the air delivery pipe. The air delivery pipe can inject high-pressure gas into the air inlet rod. The air jet from the air holes of the air inlet rod will push the piston tube and the sealing cover downward to close the opening of the filter cartridge, so as to cooperate with the air inlet rod and the reverse blowing rotary jet device to jet gas from the inside of the filter cartridge through the filter membrane outward, realizing the reverse blowing and cleaning of the dust on the filter membrane of the filter cartridge.

[0014] A rotating part is provided in the air inlet rod. Dust removal pipes are provided on both sides of the rotating part. There are communicating holes between the three components of the air inlet rod, the rotating part, and the dust removal pipes. A number of vertically arranged jet holes are provided in the dust removal pipes. The jet holes include straight jet holes and inclined jet holes. The straight jet holes directly jet gas towards the filter membrane of the filter cartridge. There is an angle between the inclined jet holes and the rotating arm. When jetting gas, it can provide the power to drive the rotating part and the dust removal pipe itself to rotate, and can also jet and clean the filter membrane.

[0015] The jet holes in the dust removal pipe are arranged such that the first hole is an inclined jet hole with an angle between it and the rotating arm, the second hole is a straight jet hole with no angle between it and the rotating arm, the third hole is an inclined jet hole, and the fourth hole is a straight jet hole, arranged in sequence and combination.

[0016] Bearings for cooperating with the intake rod are provided at the upper and lower ends of the rotating component. A number of through holes are provided in the intake rod, and the rotating component is installed around the through holes. The through holes are located between the bearings at the upper and lower ends of the rotating component. Gas enters the rotating component from the through holes of the intake rod in any direction, then enters the dust removal pipe through the channels of the rotating arms, and is then ejected from the jet holes.

[0017] When high-pressure gas is injected into the upper end of the intake rod, the gas jet from the air holes of the intake rod will push the piston pipe and the sealing cover downward to close the opening of the filter cartridge. The sealing cover can better seal the opening of the filter cartridge, making both the upper and lower ends of the filter cartridge closed ends. The gas in the intake rod will also enter the jet holes of the dust removal pipe through the through holes and be ejected. When the jet holes eject gas, the two dust removal pipes will be pushed by the reverse force of the gas ejected from the inclined jet holes to drive the rotating component and the dust removal pipe to rotate around the intake rod. The dust removal pipes will rotate and jet, ejecting high-speed airflows to clean the filter membrane of the filter cartridge. High-speed airflows can be ejected from the inside to the outside of the filter membrane in all directions, better cleaning the powder and dust attached to the filter membrane of the filter cartridge. The jet cleaning effect is good, and it is cleaned more thoroughly, avoiding the attachment of powder and dust in the filter cartridge and affecting the air flow.

[0018] The beneficial effects of the present utility model are as follows: 1. The piston pipe with an integrated structure having a piston part and a connecting part is simple and easy to manufacture. The lower end of the piston pipe can be conveniently connected to the sealing cover by screws, reducing the complex process of connecting the piston pipe and the sealing cover. The piston part at the upper end of the piston pipe can also be better inserted into the outer sleeve for cooperation, with low manufacturing cost; 2. The pressure of the gas in the outer sleeve pushing the piston cover can be close to the pressure intensity of the gas input into the intake rod. When the sealing cover moves downward, it can better seal the opening at the upper end of the filter cartridge. Long-term use can also reduce the rigid friction and wear of the piston part moving in the outer sleeve, with less wear during use, better airtightness, and longer service life; 3. Compared with the piston part composed of a number of pressing sheets and a number of air rings provided at the upper end of the piston pipe, the manufacturing cost is lower, the process is simpler, and it is easier to produce and manufacture; 4. The integrated piston part has better airtightness when moving in the outer sleeve, with stronger use stability; 5. The dust removal pipe of the rotating device jetting device is provided with straight jet holes and inclined jet holes. The straight jet holes directly eject gas against the filter membrane of the filter cartridge to clean, generating stronger straight jet cleaning force. When the inclined jet holes eject gas, they provide the power to drive the rotating component to rotate and clean the filter membrane. The combination of the two types of holes improves the dust removal effect; 6. The manufacturing process is simple, reducing the production and manufacturing cost, convenient to use, and having a broader application prospect. Description of the Drawings

[0019] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0020] Figure 1 It is a view of the connection between the piston tube and the sealing cap;

[0021] Figure 2 It is a view of the sealing device installed and used at the upper end of the filter cartridge;

[0022] Figure 3 It is an exploded view of the sealing device installed in the air inlet rod;

[0023] Figure 4 It is a cross-sectional view of the sealing device installed in the air inlet rod;

[0024] Figure 5 It is a view of the sealing device in use;

[0025] Figure 6 It is a three-dimensional view of the automatic sealing and dust removal device;

[0026] Figure 7 It is an exploded view of the automatic sealing and dust removal device;

[0027] Figure 8 It is a transverse cross-sectional view of the dust removal pipe of the automatic sealing and dust removal device;

[0028] In the figure: 1. Air inlet rod, 2. Sealing cap, 3. Piston tube, 4. Outer sleeve, 5. Filter cartridge, 6. Connecting part, 7. Piston part, 8. Support frame, 9. Thread, 10. Air hole, 11. Reinforcing rib, 12. Sinking level, 13. Negative pressure chamber, 14. Spraying chamber, 15. Exhaust duct, 16. Rotating part, 17. Dust removal pipe, 18. Straight spraying hole, 19. Oblique spraying hole, 20. Rotating arm, 21. Included angle, 22. Bearing, 23. Through hole, 24. Card slot, 25. Snap ring. Specific implementation method

[0029] In Figure 1-2In the illustrated embodiment, an automatic sealing and dust removal device includes a piston tube 3. The piston tube 3 is an integrated component, with a piston part 7 at the upper end and a connecting part 6 at the lower end. A number of reinforcing ribs 11 are provided between the piston part 7 and the connecting part 6. A central hole in the piston tube 3 is provided to cooperate with the intake rod 1, and the intake rod 1 can pass through the central hole of the piston tube 3. The piston tube 3 and the piston part 7 can be inserted into the outer sleeve tube 4 and move therein. The connecting part 6 of the piston tube 3 is integrally connected to the sealing cover 2. The integrated structure of the piston tube with the piston part 7 and the connecting part 6 is simple and easy to manufacture. The lower end of the piston tube can be conveniently connected to the sealing cover 2 by screws, which has a lower manufacturing cost, simpler process, and is easier to produce and manufacture compared to a piston part 7 composed of a number of pressing pieces and a number of air rings 7 provided at the upper end of the piston tube. Moreover, the airtightness is better when the integrated piston part 7 is installed and moves inside the outer sleeve tube 4. The sealing cover 2 can also be simply fixed to the lower end of the connecting part by screws. The connection of the entire piston tube and the sealing cover is simple, convenient, low-cost, and highly durable.

[0030] In Figure 2-5 In the illustrated embodiment, an automatic sealing and dust removal device includes an outer sleeve tube 4, a piston tube 3, a sealing cover 2, and an intake rod 1. An intake rod 1 is provided in the central hole of the outer sleeve tube 4, and the intake rod 1 is provided with air holes 10 for blowing air into the outer sleeve tube 4. A piston tube 3 is provided inside the outer sleeve tube 4. The piston tube 3 is an integrated component, with a piston part 7 at the upper end and a connecting part 6 at the lower end. The piston tube 3 and the piston part 7 can be inserted into the outer sleeve tube 4 and move therein. The connecting part 6 of the piston tube 3 can be integrally connected to the sealing cover 2. When the air holes 10 of the intake rod 1 jet air, the gas enters the outer sleeve tube 4 and will push the piston cover and the inner sleeve tube 3 downward, and the downward movement of the inner sleeve tube 3 drives the integrally connected sealing cover 2 downward.

[0031] The piston tube 3 is provided with a central hole to cooperate with the intake rod 1, and the intake rod 1 can pass through the central hole of the piston tube 3. The piston tube 3 can slide upward or downward centered on the intake rod 1 inside the outer sleeve tube 4.

[0032] The connection between the connecting part 6 of the piston tube 3 and the sealing cover 2 is by screw connection or by rivet connection, that is, the rivet connects the sealing cover 2 and the connecting part 6 and fixes them as a whole.

[0033] The lower end surface of the connecting part 6 of the piston tube 3 is a smooth plane, which can better cooperate and connect with the upper end surface of the sealing cover 2 to avoid air leakage at the connection.

[0034] The piston tube 3 is made of plastic material. A number of reinforcing ribs 11 are provided between the piston part 7 and the connecting part 6. The reinforcing ribs 11 make the overall piston tube 3 have better strength and will not deform when stressed. In addition, the plastic piston tube 3 is simple and convenient to manufacture during the manufacturing process, can be quickly produced by an injection mold, and when the piston part 7 moves inside the outer casing 4, it can move more smoothly and has better sealing performance.

[0035] The piston tube 3 can be any one or more of nylon, ABS plastic, PP plastic, PI plastic or other mixed plastic materials.

[0036] The outer circumferential surface of the piston part 7 of the piston tube 3 is a smooth surface, and the frictional resistance generated when the piston part 7 moves inside the outer casing 4 is smaller.

[0037] A sinking level 12 is provided on the upper end surface of the piston part 7 of the piston tube 3, which can better push the piston part 7 to move when gas is input into the outer casing 4.

[0038] The outer casing 4 is made of metal material, which can be stainless steel. The plastic piston tube 3 cooperates with the outer casing 4. When the plastic piston part 7 moves inside the outer casing 4, it can reduce rigid friction and wear, has less wear during use, better airtightness, and longer service life.

[0039] The piston tube 3 with an integrated structure having a piston part 7 and a connecting part 6 is simple and easy to manufacture. The lower end of the piston tube 3 can be conveniently connected to the sealing cap 2 by screws, reducing the complex process of connecting the piston tube 3 and the sealing cap 2. The piston part at the upper end of the piston tube 3 can also be better inserted into the outer casing 4 for cooperation. The pressure of the gas pushing the piston cover inside the outer casing 4 can be close to the pressure intensity of the gas input into the intake rod 1. When the sealing cap 2 moves downward, it can better seal the opening at the upper end of the filter cartridge 5. Long-term use can also reduce the rigid friction and wear of the piston part 7 moving inside the outer casing 4, has less wear during use, better airtightness, and longer service life; compared with a piston part 7 composed of a number of pressing pieces and a number of air rings provided at the upper end of the piston tube, the manufacturing cost is lower, the process is simpler, it is easier to produce and manufacture, and the airtightness of the integrated piston part 7 when moving inside the outer casing 4 is also better. The sealing cap 2 can also be simply fixed to the lower end of the connecting part by screws. The connection between the entire piston tube and the sealing cap is simple, convenient, durable, has good use stability, and low cost.

[0040] The upper end of the intake rod 1 is provided with a screw thread 9. By the cooperation connection of the nut and the screw thread 9, the intake rod 1 and the outer sleeve 4 can be fixed at the center of the support frame 8. The support frame 8 supports the entire sealing device. The upper end opening of the intake rod 1 can be connected to an air delivery pipe, and the air delivery pipe can inject high-pressure gas into the intake rod 1. When the air holes 10 of the intake rod 1 jet air, it will push the piston tube 3 and the sealing cover 2 to move downward to cover the opening of the filter cartridge 5, so that the upper end of the filter cartridge 5 forms a closed end, and the gas entering the filter cartridge can only pass through the filter membrane of the filter cartridge 5.

[0041] In Figure 5 In the illustrated embodiment, the end part of the filter cartridge 5 is a closed end, and the upper end is provided with an opening and is installed in the negative pressure chamber 13, and the lower end is in the spraying chamber 14. The support frame 8 can be installed in the negative pressure chamber 13, at the upper end of the opening of the filter cartridge 5. The lower end of the intake rod 1 is inserted into the filter cartridge 5, and the sealing cover 2 is above the opening of the filter cartridge 5. The end of the intake rod 1 is a closed end. The intake rod 1 in the filter cartridge 5 can be designed with a number of air jet holes to jet air into the filter cartridge 5, or a rotary air jet device can be arranged in the intake rod 1 in the filter cartridge 5 to jet air into the filter cartridge 5; when the air holes 10 of the intake rod 1 jet air, it will push the piston tube 3 and the sealing cover 2 to move downward to cover the opening of the filter cartridge 5, and can better seal the opening of the filter cartridge 5, so that both the upper and lower ends of the filter cartridge 5 are closed ends, and the air jet holes or the rotary air jet device of the intake rod 1 in the filter cartridge 5 will jet air into the filter cartridge 5 to remove particles such as coating powder and dust attached to the filter membrane of the filter cartridge 5. When the intake rod 1 stops inputting gas and the exhaust fan starts, the exhaust duct 15 in the negative pressure chamber 13 will generate suction, and the air flow will enter the filter cartridge 5 from the filter membrane of the filter cartridge 5, flow towards the top opening of the filter cartridge 5, and push the piston tube 3 and the sealing cover 2 upward. The opening at the upper end of the filter cartridge 5 will automatically open, the air flow will flow into the exhaust duct 15 and be discharged into the exhaust fan, and the air flow in the spraying chamber 14 will continuously flow into the filter membrane of the filter cartridge 5. The filter cartridge 5 filters the dust in the spraying chamber 14, and also achieves the effect of exhausting air in the spraying chamber 14, avoiding the emission of powder and dust.

[0042] In Figure 6-8In the illustrated embodiment, an automatic sealing and dust removal device includes an outer sleeve 4, a piston tube 3, a sealing cover 2, an air inlet rod 1, a dust removal tube 17, and a rotating member 16. An air inlet rod 1 is disposed in the central hole of the outer sleeve 4. The air inlet rod 1 is provided with air holes 10 capable of blowing air into the outer sleeve 4. A piston tube 3 is disposed inside the outer sleeve 4. The piston tube 3 is an integral component, with a piston portion 7 at the upper end and a connecting portion 6 at the lower end. The piston tube 3 and the piston portion 7 can be inserted into the outer sleeve 4 and move therein. The connecting portion 6 of the piston tube 3 can be connected integrally with the sealing cover 2. When the air holes 10 of the air inlet rod 1 jet air, the air entering the outer sleeve 4 will push the piston cover and the inner sleeve 3 downward, and the downward movement of the inner sleeve 3 drives the integrally connected sealing cover 2 to move downward.

[0043] The piston tube 3 is provided with a hole center that cooperates with the air inlet rod 1. The air inlet rod 1 can pass through the hole center of the piston tube 3. The piston tube 3 can slide upward or downward centered in the outer sleeve 4 with the air inlet rod 1 as a guide.

[0044] A rotating member 16 is disposed in the air inlet rod 1. Dust removal tubes 17 are provided on both sides of the rotating member 16. There are communicating channels among the three components of the air inlet rod 1, the rotating member 16, and the dust removal tubes 17. A number of vertically arranged jet holes are provided in the dust removal tubes 17. The jet holes include direct jet holes 18 and inclined jet holes 19. The direct jet holes 18 directly jet air against the filter membrane of the filter cartridge 5 to directly clean the powder and dust in the filter membrane. The included angle 21 between the direct jet holes 18 and the rotating arm 20 can be a zero-degree angle. The distance between the direct jet holes 18 and the filter membrane is closer, resulting in a stronger direct jet force, better cleaning strength and effect. The inclined jet holes 19 are provided with an included angle 21 with the rotating arm 20, which can provide the power to drive the rotating member 16 and the dust removal tubes 17 to rotate when jetting air, and also clean the filter membrane. The two types of air holes can be arranged vertically and alternately, that is, the first hole is an inclined jet hole 19 with an included angle 21 with the rotating arm 20, the second hole is a direct jet hole 18 with no included angle with the rotating arm 20, the third hole is an inclined jet hole 19, the fourth hole is a direct jet hole 18, and so on, or other combination methods, which further improve the jet cleaning effect during use. Without limitation, the air hole arrangement between the two dust removal tubes 17 on the left and right can be opposite, and the value of the included angle 76 can also be set to any fixed angle value between 5 - 35 degrees and 10 - 25 degrees.

[0045] Bearings 22 capable of cooperating with the intake rod 7 are provided at the upper and lower ends of the rotating member 16. A plurality of through holes 23 are provided in the intake rod 1. The rotating member 16 is installed around the through holes 23. The through holes 23 are located between the bearings 22 at the upper and lower ends of the rotating member 16. The intake rod 1 is provided with a clamping groove 24 that cooperates with a snap ring 25 to limit the rotating member 16 in the through hole 23 of the intake rod 1, preventing the intake rod 1 from moving in the vertical direction. One rotating member 16 can be combined with two dust removal pipes 17 into one body, or two rotating members 16 can be combined with the dust removal pipes 17 into one body; or multiple dust removal pipes 17 can be combined on one rotating member 16.

[0046] Rotating arms 20 are provided on both sides of the rotating member 16. A channel is provided in the rotating arms 20 and is in communication with the through hole 23. Dust removal pipes 17 are respectively provided at the end parts of the rotating arms 20 on the left and right sides of the rotating member 16. The upper and lower ends of the dust removal pipes 17 are closed ends. Gas enters the rotating member 16 from the through hole 23 of the intake rod 1 in any direction, then enters the dust removal pipe 16 through the channel of the rotating arm 20, and is then ejected from the jet holes.

[0047] When high-pressure gas is injected into the upper end of the intake rod 1, the gas jet from the air hole 10 of the intake rod 1 will push the piston tube 3 and the sealing cover 2 downward to close the opening of the filter cartridge 5. The sealing cover 2 can preferably seal the opening of the filter cartridge 5, making both the upper and lower ends of the filter cartridge 5 closed ends (the lower end of the filter cartridge is already a closed end without an opening). The gas in the intake rod 1 will also enter the jet holes of the dust removal pipes 17 from the through holes 23 and be ejected. When the gas is ejected from the jet holes, the two dust removal pipes 16 will be pushed by the reaction force of the gas ejected from the inclined jet holes 19 to drive the rotating member 16 and the dust removal pipes 17 to rotate around the intake rod 1 as the axis. The dust removal pipes 17 will rotate and jet, ejecting high-speed airflows to clean the filter membrane of the filter cartridge 12. High-speed airflows can be ejected from the inside to the outside of the filter membrane in all directions, preferably cleaning the powder and dust attached to the filter membrane of the filter cartridge 12. The cleaning effect of the jet is good and it is cleaned relatively cleanly, preventing powder and dust from adhering to the filter cartridge and affecting the airflow.

[0048] The connection between the connecting part 6 of the piston tube 3 and the sealing cover 2 is by screw connection or rivet connection, that is, the rivet connects the sealing cover 2 and the connecting part 6 and fixes them into one body.

[0049] The lower end face of the connecting part 6 of the piston tube 3 is a smooth plane, which can preferably cooperate with the upper end face of the sealing cover 2 to avoid air leakage at the connection.

[0050] The piston tube 3 is made of plastic material. A number of reinforcing ribs 11 are provided between the piston part 7 and the connecting part 6. The reinforcing ribs 11 make the overall piston tube 3 have better strength and will not deform when stressed. In addition, the plastic piston tube 3 is simple and convenient to manufacture during the manufacturing process, and can be quickly produced by an injection mold. Moreover, when the piston part 7 moves inside the outer sleeve 4, it can move more smoothly and has better sealing performance.

[0051] The piston tube 3 can be any one or more of nylon, ABS plastic, PP plastic, PI plastic or other mixed plastic materials.

[0052] The outer sleeve 4 is made of metal material, which can be stainless steel. When the plastic piston tube 3 cooperates with the outer sleeve 4 and the plastic piston part 7 moves inside the outer sleeve 4, it can reduce rigid friction and wear, has less wear during use, better airtightness and longer service life.

Claims

1. An automatic sealing and dust removal device, comprising an outer sleeve, a piston tube, a sealing cover, and an air inlet rod, characterized in that: An air inlet rod is disposed in the central hole of the outer sleeve. The air inlet rod is provided with air holes for blowing air into the outer sleeve. A piston tube is disposed inside the outer sleeve. The piston tube is an integral component, with a piston part at the upper end and a connecting part at the lower end. The piston tube and the piston part can be inserted into the outer sleeve and move therein. The connecting part of the piston tube can be integrally connected to the sealing cover. When the air holes of the air inlet rod jet air, the air enters the outer sleeve, pushing the piston cover and the inner sleeve downward. The downward movement of the inner sleeve drives the integrally connected sealing cover downward.

2. The automatic sealing and dust removal device according to claim 1, wherein: The piston tube is provided with a hole center that cooperates with the air inlet rod. The air inlet rod can pass through the hole center of the piston tube, and the piston tube can slide upward or downward in the center of the outer sleeve guided by the air inlet rod.

3. The automatic sealing and dust removal device according to claim 2, characterized in that: The piston tube is made of plastic material. A number of reinforcing ribs are provided between the piston part and the connecting part. The piston tube is any one of nylon, ABS plastic, PP plastic, PI plastic, or a mixed plastic.

4. The automatic sealing and dust removal device according to claim 1 or 3, characterized in that: The connecting part of the piston tube and the sealing cover are fixedly connected into one body by screws or by rivets.

5. The automatic sealing and dust removal device according to claim 4, characterized in that: The lower end surface of the connecting part of the piston tube is a smooth plane, and the outer peripheral surface of the piston part is a smooth surface.

6. The automatic sealing and dust removal device according to claim 5, wherein: A sink is provided on the upper end surface of the piston part of the piston tube.

7. An automatic sealing and dust removal device, comprising an outer sleeve, a piston tube, a sealing cover, an air inlet rod, a dust removal tube, and a rotating component, characterized in that: An air inlet rod is disposed in the central hole of the outer sleeve. The air inlet rod is provided with air holes for blowing air into the outer sleeve. A piston tube is disposed inside the outer sleeve. The piston tube is an integral component, with a piston part at the upper end and a connecting part at the lower end. The piston tube and the piston part can be inserted into the outer sleeve and move therein. A hole center that cooperates with the air inlet rod is provided in the center of the piston tube. The air inlet rod can pass through the hole center of the piston tube. The connecting part of the piston tube can be integrally connected to the sealing cover. When the air holes of the air inlet rod jet air, the air enters the outer sleeve, pushing the piston cover and the inner sleeve downward. The downward movement of the inner sleeve drives the integrally connected sealing cover downward; the air inlet rod is provided with a rotating component. Dust removal tubes are provided on both sides of the rotating component. Communication holes are provided among the three components of the air inlet rod, the rotating component, and the dust removal tubes. A number of vertically arranged air jet holes are provided in the dust removal tubes. The air jet holes include straight jet holes and inclined jet holes. The straight jet holes directly jet air against the filter membrane of the filter cartridge. An included angle is provided between the inclined jet holes and the rotating arm. When jetting air, it can provide power to drive the rotating component and the dust removal tubes to rotate, and can also clean the filter membrane.

8. The automatic sealing and dust removal device according to claim 7, characterized in that: The air jet holes in the dust removal tube are arranged such that the first hole is an inclined jet hole with an included angle between the inclined jet hole and the rotating arm, the second hole is a straight jet hole with no included angle between the straight jet hole and the rotating arm, the third hole is an inclined jet hole, and the fourth hole is a straight jet hole, arranged in sequence and combination.

9. The automatic sealing and dust removal device according to claim 7 or 8, characterized in that: Bearings that can cooperate with the air inlet rod are provided at the upper and lower ends of the rotating component. A number of through holes are provided in the air inlet rod. The rotating component is installed outside the periphery of the through holes. The through holes are located between the bearings at the upper and lower ends of the rotating component. Air enters the rotating component from the through holes of the air inlet rod, then passes through the channels of the rotating arm and enters the dust removal tubes, and is then jetted out from the air jet holes.

10. An automatic sealing and dust removal device, comprising a piston tube, characterized in that: The piston tube is an integrated component, with a piston part at the upper end and a connecting part at the lower end. A number of reinforcing ribs are provided between the piston part and the connecting part. A hole center that mates with the intake rod is provided in the center of the piston tube. The intake rod can pass through the hole center of the piston tube. The piston tube and the piston part can be inserted into the outer tube to move, and the connecting part of the piston tube can be integrally connected to the sealing cover.

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