A circulating compressed air filtering mechanism

Abstract

The present invention relates to the field of gas filtration technology, specifically to a circulating compressed gas filtering mechanism, including a shell, on which are provided: a first filter cartridge covering an air inlet pipe and a second filter cartridge covering the first filter cartridge, and the first filter cartridge and the second filter cartridge are both provided with receiving plates distributed in a circular array. In the circulating compressed gas filtering mechanism provided by the invention, a knocking block on a movable cylinder knocks the receiving plate, and the receiving plate drives the first filter cartridge and the second filter cartridge to shake, and some particles attached to the first filter cartridge and the second filter cartridge are shaken off. At this time, most of the particles will adhere to the water curtain on the movable cylinder and flow downward with the water curtain, so as to prevent the particles shaken off from being suspended in the cavity and then being moved by the gas, and knock the filter cartridge by the movable cylinder to shake off some particles attached to the filter cartridge, and the water curtain on the movable cylinder absorbs the particles shaken off, cleans the filter cartridge, and prolongs the cleaning and replacement cycle of the filter cartridge.

Description

Technical Field

[0001] The invention relates to the technical field of gas filtering, and in particular to a circulating compressed gas filtering mechanism. Background Art

[0002] Vacuum pumps are widely used in the fields of pharmaceutical chemicals, food machinery, industrial furnaces, electronics, vacuum equipment, mining, and ground treatment. Vacuum pumps are also needed in the production of tocopherol and sealed succinate. When the vacuum pump is pumping air from powdered objects, it is easy to draw the objects into the pump, causing pollution to the pump body. Therefore, some vacuum pumps use impact airflow to push the piston to avoid wear caused by mutual contact of mechanical material components. Impact airflow can also be used to clean the cylinder.

[0003] When impact gas is generated, it needs to be compressed. In the process of compressing gas, it is generally compressed by an air compressor. However, in order to ensure the service life of the air compressor, there will be lubricating oil in the extrusion chamber of the air compressor. In the process of gas compression, part of the lubricating oil will be converted into oil gas, which will pollute the compressed gas. The impurities in the oil gas and the compressed gas will affect the quality of the compressed gas, and then affect the work of the impact gas in the cylinder.

[0004] According to the publication (announcement) number CN102671505B, the publication (announcement) date is 2014.09.03, a rotary compressed air filter is disclosed, which is characterized in that an annular alternating flow channel is formed on the outside of the compressed air filter, so that the compressed air forms turbulence and removes most of the liquid water and oil mist in the compressed air under the action of centrifugal force. A certain amount of high-efficiency oil-water adsorber is filled on the inside of the compressed air filter and a porous plate is fixed on the upper end of the compressed air filter. The device can effectively remove liquid water droplets and oil mist impurities in the compressed air, improve the pre-filtration efficiency of the filter, and is easy to install and low in cost.

[0005] In the prior art including the above patents, the gas needs to be filtered after compression to remove the oil, gas and impurities in the compressed gas. The existing filtering work is generally undertaken by a special filter, and the main component of the filter element in the filter is glass fiber. The filter element made of glass fiber has a fine fiber structure and can efficiently capture tiny particles and solid particles. It has excellent filtering performance in gas filtration, but the excellent filtering performance also makes the channels on it easy to be blocked by particles, so the filter element made of glass fiber must be cleaned or replaced frequently. Summary of the invention

[0006] The purpose of the present invention is to provide a circulating compressed air filtering mechanism to solve the above-mentioned problems.

[0007] In order to achieve the above object, the present invention provides a circulating compressed air filtering mechanism, comprising a housing, on which is provided:

[0008] A first filter cartridge covering the air inlet pipe and a second filter cartridge covering the first filter cartridge, wherein the first filter cartridge and the second filter cartridge are both provided with receiving pieces distributed in a circumferential array;

[0009] A movable cylinder is rotatably mounted on the housing and is located between the first filter cylinder and the second filter cylinder. A plurality of knocking blocks are movably arranged on the movable cylinder. The movable cylinder is provided with movable bars distributed in a linear array and used to guide water flow, wherein:

[0010] The movable cylinder drives the knocking block to knock the receiving plate to make the first filter cartridge and the second filter cartridge shake, and the plurality of movable bars receive water flow to form a water curtain and absorb particulate matter between the first filter cartridge and the second filter cartridge.

[0011] Preferably, the movable cylinder comprises an upper movable ring, a lower movable ring and a connecting column connecting the upper movable ring and the lower movable ring which are distributed in parallel, and the connecting column supports a plurality of the movable bars to separate the first filter cylinder and the second filter cylinder.

[0012] Preferably, the cross section of the movable strip is in a "∧" shape, and a "∧"-shaped air channel is formed between two adjacent movable strips to guide the airflow.

[0013] Preferably, a paddle is movably provided inside the connecting column, and the paddle moves to push the movable strip to move, so that gaps for airflow to pass through appear between the movable strips.

[0014] Preferably, a driving rod is provided inside the connecting column, and the movable cylinder rotates to make the driving rod rotate relative to the movable cylinder, thereby driving the paddle to reciprocate in the vertical direction.

[0015] Preferably, a plurality of positioning blocks for separating the movable bars are arranged inside the connecting column, and a spring is arranged between the positioning blocks and the movable bars.

[0016] Preferably, the paddle is an elastic sheet, and the paddle moves to make the notch move back and forth in a vertical direction.

[0017] Preferably, the movable bar is provided with an inclined guide groove for guiding water flow into the airway.

[0018] Preferably, a connecting rod is rotatably provided on the lower movable ring, knocking blocks are symmetrically provided on the connecting rod, and the receiving pieces on the two filter cartridges are staggered.

[0019] Preferably, a scraper rod for collecting impurities on the liquid surface is provided on the lower movable ring, and a movable block extending below the sealing liquid surface is movably provided at the bottom of the first filter cartridge.

[0020] In the above technical scheme, a circulating compressed gas filtering mechanism provided by the present invention has the following beneficial effects: after the gas is compressed, the gas is passed into the air inlet pipe, the air inlet pipe sends the compressed gas to the first filter cartridge, the gas contacts the sealing liquid under the guidance of the air inlet pipe, the sealing liquid adsorbs part of the particulate matter and oil gas in the gas, then the gas passes through the first filter cartridge and comes to the cavity between the first filter cartridge and the second filter cartridge, the first filter cartridge filters out part of the particulate matter in the gas, at this time, the mixed liquid composed of water and detergent enters the shell from the liquid inlet pipe and is poured on the movable cylinder, the movable bars on the movable cylinder receive the mixed liquid, the mixed liquid forms a water curtain on the movable bars distributed in a linear array, hindering the flow of gas, the gas will fully contact with the water curtain when flowing from the gaps between the movable bars, the water curtain adsorbs the particulate matter in the gas, The oil and gas come into contact with and react with the detergent, and the mixed liquid removes the particulate matter and oil and gas in the gas. The longer air inlet pipe and movable cylinder can hinder the gas flow and reduce the gas flow speed, preventing the particulate matter in the gas from hitting the filter cartridge at a faster speed and getting stuck in the deep of the filter cartridge. At the same time, the movable cylinder rotates, and the knocking block on the movable cylinder knocks the receiving piece, which drives the first filter cartridge and the second filter cartridge to shake, and some of the particulate matter attached to the first filter cartridge and the second filter cartridge are shaken off. At this time, most of the particulate matter will attach to the water curtain on the movable cylinder and flow downward with the water curtain, avoiding the shaken-off particulate matter from being suspended in the cavity and being moved by the gas, and knocking the filter cartridge through the movable cylinder to shake off some of the particulate matter attached to the filter cartridge, and the water curtain on the movable cylinder absorbs the shaken-off particulate matter, cleans the filter cartridge, and extends the cleaning and replacement cycle of the filter cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the internal structure provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the structure of a first filter cartridge provided in an embodiment of the present invention;

[0025] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0027] Figure 6 A schematic diagram of the structure of a movable cylinder provided in an embodiment of the present invention;

[0028] Figure 7 A schematic diagram of the structure of an activity bar provided by an embodiment of the present invention;

[0029] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0030] Fig. 9 for Figure 7 Enlarged view of point D in the middle;

[0031] Fig.10 A schematic diagram of the internal structure of a connecting column provided in an embodiment of the present invention;

[0032] Fig.11 for Fig.10 Enlarged view of point E in the middle;

[0033] Fig.12 A schematic diagram of the structure of an airway provided in an embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 1. Shell; 11. Movable cylinder; 111. Upper movable ring; 1111. Connecting column; 1112. Transmission ring; 112. Lower movable ring; 1121. Scraper rod; 1122. Push block; 113. Movable strip; 1131. Guide groove; 1132. Notch; 114. Connecting piece; 115. Airway; 116. Positioning block; 117. Paddle; 118. Driving rod; 119. Gear; 12. First filter cartridge; 121. Movable block; 122. Second filter cartridge; 123. Receiver; 124. Knocking block; 125. Connecting rod; 126. Flexible connecting ring; 131. Inlet pipe; 132. Exhaust pipe; 133. Impeller; 134. Driving wheel; 135. Drain pipe; 136. Sealing liquid; 137. Inlet pipe. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] like Figure 1-12 As shown, a circulating compressed air filtering mechanism comprises a housing 1, on which are provided:

[0038] A first filter cartridge 12 covering the air inlet pipe 131 and a second filter cartridge 122 covering the first filter cartridge 12, wherein the first filter cartridge 12 and the second filter cartridge 122 are both provided with receiving pieces 123 distributed in a circumferential array;

[0039] The movable cylinder 11 is rotatably mounted on the housing 1 and is located between the first filter cylinder 12 and the second filter cylinder 122. A plurality of knocking blocks 124 are movably arranged on the movable cylinder 11. The movable cylinder 11 is provided with movable bars 113 distributed in a linear array and used to guide the water flow, wherein:

[0040] The movable cylinder 11 drives the knocking block 124 to knock the receiving piece 123 to make the first filter cartridge 12 and the second filter cartridge 122 shake, and the plurality of movable bars 113 receive the water flow to form a water curtain and absorb particulate matter between the first filter cartridge 12 and the second filter cartridge 122 .

[0041] Specifically, an air inlet pipe 131 is provided in the middle of the shell 1, and exhaust pipes 132 distributed in a circular array around the air inlet pipe 131 are provided on the shell 1. A liquid inlet pipe 137 for the flow of a mixed liquid composed of water and detergent is provided on the top of the shell 1. The mixed liquid accumulates at the bottom of the inner side of the shell 1 to form a sealing liquid 136 that seals the bottom of the first filter cartridge 12 and the second filter cartridge 122. The first filter cartridge 12 and the second filter cartridge 122 are both glass fiber filter cartridges. The first filter cartridge 12 and the second filter cartridge 122 are connected to the shell 1 through a flexible connecting ring 126 so that the first filter cartridge 12 and the second filter cartridge 122 can shake relative to the shell 1.

[0042] Furthermore, after the gas is compressed, the gas is passed into the air inlet pipe 131, and the air inlet pipe 131 sends the compressed gas to the first filter cartridge 12. Under the guidance of the air inlet pipe 131, the gas contacts the sealing liquid 136, and the sealing liquid 136 absorbs part of the particles and oil and gas in the gas. Then the gas passes through the first filter cartridge 12 and comes into the cavity between the first filter cartridge 12 and the second filter cartridge 122. The first filter cartridge 12 filters out part of the particles in the gas. At this time, a mixed liquid composed of water and detergent enters the shell 1 from the liquid inlet pipe 137 and is poured on the movable cylinder 11. The movable bars 113 on the movable cylinder 11 receive the mixed liquid. The mixed liquid forms a water curtain on the movable bars 113 distributed in a linear array, which hinders the flow of gas. When the gas flows through the gaps between the movable bars 113, it will fully contact the water curtain. The water curtain absorbs the particles in the gas, and the oil and gas contact and react with the detergent. , the mixed liquid removes the particles and oil and gas in the gas, the longer air inlet pipe 131 and the movable cylinder 11 can hinder the gas flow, reduce the gas flow speed, and prevent the particles in the gas from hitting the filter cartridge at a faster speed and getting stuck in the deep part of the filter cartridge. At the same time, the movable cylinder 11 rotates, and the knocking block 124 on the movable cylinder 11 knocks the receiving piece 123, and the receiving piece 123 drives the first filter cartridge 12 and the second filter cartridge 122 to shake, and some of the particles attached to the first filter cartridge 12 and the second filter cartridge 122 are shaken off. At this time, most of the particles will adhere to the water curtain on the movable cylinder 11 and flow downward with the water curtain to prevent the shaken-off particles from being suspended in the cavity and being moved by the gas. The movable cylinder 11 is used to knock the filter cartridge to shake off some of the particles attached to the filter cartridge, and the water curtain on the movable cylinder 11 absorbs the shaken-off particles, cleans the filter cartridge, and extends the cleaning and replacement cycle of the filter cartridge.

[0043] Furthermore, the filter cartridge in the above embodiment is a general term for the first filter cartridge 12 and the second filter cartridge 122 .

[0044] Furthermore, the filter cartridges in the above embodiment can be multiple, and the filter cartridges only need to be matched with the movable cartridge 11. Multiple filter cartridges can also further improve the filtering efficiency.

[0045] Furthermore, the flexible connecting ring 126 in the above embodiment is specifically composed of elastic metal strips and rubber rings distributed in a circular array, the elastic metal strips connect the filter cartridge and the shell 1, and the rubber ring seals the connection between the top of the filter cartridge and the shell 1; it can also be a structure that can be obtained by other technical personnel in this field based on common technical knowledge.

[0046] In the above technical solution, after the gas is compressed, the gas is passed into the air inlet pipe 131, and the air inlet pipe 131 sends the compressed gas to the first filter cartridge 12. Under the guidance of the air inlet pipe 131, the gas contacts the sealing liquid 136, and the sealing liquid 136 absorbs part of the particulate matter and oil and gas in the gas. Then the gas passes through the first filter cartridge 12 and comes to the cavity between the first filter cartridge 12 and the second filter cartridge 122. The first filter cartridge 12 filters out part of the particulate matter in the gas. At this time, a mixed liquid composed of water and detergent enters the shell 1 from the liquid inlet pipe 137 and is poured on the movable cylinder 11. The movable bars 113 on the movable cylinder 11 receive the mixed liquid. The mixed liquid forms a water curtain on the movable bars 113 distributed in a linear array, which hinders the flow of gas. When the gas flows through the gaps between the movable bars 113, it will fully contact with the water curtain. The water curtain absorbs the particulate matter in the gas, and the oil and gas contact and Reaction, the mixed liquid removes the particles and oil and gas in the gas, the longer air inlet pipe 131 and the movable cylinder 11 can hinder the gas flow, reduce the gas flow speed, and prevent the particles in the gas from hitting the filter cartridge at a faster speed and getting stuck in the deep of the filter cartridge. At the same time, the movable cylinder 11 rotates, and the knocking block 124 on the movable cylinder 11 knocks the receiving piece 123, and the receiving piece 123 drives the first filter cartridge 12 and the second filter cartridge 122 to shake, and some of the particles attached to the first filter cartridge 12 and the second filter cartridge 122 are shaken off. At this time, most of the particles will adhere to the water curtain on the movable cylinder 11 and flow downward with the water curtain to prevent the shaken-off particles from being suspended in the cavity and being moved by the gas. The movable cylinder 11 is used to knock the filter cartridge to shake off some of the particles attached to the filter cartridge, and the water curtain on the movable cylinder 11 absorbs the shaken-off particles to clean the filter cartridge, thereby extending the cleaning and replacement cycle of the filter cartridge.

[0047] As a further embodiment of the present invention, the movable cylinder 11 includes an upper movable ring 111, a lower movable ring 112 and a connecting column 1111 connecting the upper movable ring 111 and the lower movable ring 112. The connecting column 1111 supports multiple movable bars 113 to separate the first filter cartridge 12 and the second filter cartridge 122.

[0048] Specifically, an impeller 133 is disposed inside one of the exhaust pipes 132 , a driving wheel 134 is disposed on the impeller 133 , a transmission ring 1112 is disposed on the upper movable ring 111 , and a synchronous chain is disposed between the transmission ring 1112 and the driving wheel 134 .

[0049] Furthermore, when the gas flows through the exhaust pipe 132, the gas drives the impeller 133 to rotate, and the impeller 133 drives the transmission ring 1112 to rotate through the driving wheel 134 and the synchronous chain. The transmission ring 1112 drives the upper movable ring 111, the connecting column 1111 and the lower movable ring 112 to rotate, so that the knocking block 124 on the movable cylinder 11 knocks the receiving plate 123, causing the first filter cartridge 12 and the second filter cartridge 122 to shake, and some particles on the first filter cartridge 12 and the second filter cartridge 122 are shaken off.

[0050] As another embodiment further provided by the present invention, the cross section of the movable strip 113 is in a “∧” shape, and a “∧”-shaped air channel 115 is formed between two adjacent movable strips 113 to guide the airflow.

[0051] Specifically, when the gas flows through the "∧"-shaped air channel 115 between the movable bars 113, the particles in the gas collide with the bottom of the upper movable bar 113 under the action of inertia, and are then adsorbed by the mixed liquid on the movable bar 113. At the same time, the detergent in the mixed liquid reacts with the oil and gas in the gas to remove the oil and gas in the gas.

[0052] As another embodiment further provided by the present invention, a paddle 117 is movably provided inside the connecting column 1111 , and the paddle 117 moves to push the movable bars 113 to move, so that gaps 1132 for airflow to pass through appear between the movable bars 113 .

[0053] Specifically, during the rotation of the movable cylinder 11 , the paddle 117 moves and paddles the movable bars 113 . The paddle 117 paddles one of the movable bars 113 , thereby increasing the distance between the movable bar 113 and an adjacent movable bar 113 , so as to improve the gas passing efficiency.

[0054] As another embodiment further provided by the present invention, a driving rod 118 is disposed inside the connecting column 1111 , and the movable cylinder 11 rotates to make the driving rod 118 rotate relative to the movable cylinder 11 , and drives the paddle 117 to reciprocate in the vertical direction.

[0055] Specifically, the movable bar 113 is symmetrically provided with connecting pieces 114, the driving rod 118 is provided with a gear 119, the housing 1 is provided with a gear ring meshing with the gear 119, the driving rod 118 is specifically a reciprocating screw, and the paddle 117 is provided with a through hole adapted to the driving rod 118.

[0056] Furthermore, when the movable cylinder 11 rotates with the driving rod 118, the gear ring on the housing 1 drives the gear 119 and the driving rod 118 to rotate, the driving rod 118 drives the paddle 117 to move back and forth in the vertical direction, and the paddle 117 drives the connecting piece 114 and the movable bar 113 to move.

[0057] As another embodiment further provided by the present invention, a plurality of positioning blocks 116 for separating the movable bar 113 are arranged inside the connecting column 1111, and a spring is arranged between the positioning block 116 and the movable bar 113. The paddle 117 is specifically an elastic sheet. The paddle 117 moves to make the notch 1132 reciprocate in the vertical direction. The change in the position of the notch 1132 can change the position where the gas passes, so that the second filter cartridge 122 can be fully utilized.

[0058] Specifically, in the process of the paddle 117 moving upward, the paddle 117 pushes the connecting piece 114 located close to the top thereof to move upward, the spring between the connecting piece 114 and the positioning block 116 below it is stretched, and the spring between the connecting piece 114 and the positioning block 116 above it is compressed, and the paddle 117 continues to move upward. The connecting piece 114 is blocked by the spring and cannot continue to move upward. At this time, the end of the paddle 117 is deformed and gradually staggered with the connecting piece 114. The connecting piece 114 loses thrust and resets under the action of the spring, and the paddle 117 continues to push the upper connecting piece 114 and the movable bar 113 to move.

[0059] As another embodiment further provided by the present invention, an inclined guide groove 1131 is provided on the movable bar 113 for guiding water flow into the air channel 115 .

[0060] Specifically, the mixed liquid flows downward from the top of the movable cylinder 11, and the mixed liquid above the movable bar 113 enters the air channel 115 below the movable bar 113 from the inclined guide groove 1131, so that the gas flowing through the air channel 115 can come into contact with the mixed liquid, and then the mixed liquid cleans impurities in the gas. At the same time, the inclined guide groove 1131 can also prevent the gas from flowing directly from the guide groove 1131 to the top of the movable bar 113.

[0061] As another embodiment further provided by the present invention, a connecting rod 125 is rotatably provided on the lower movable ring 112, and knocking blocks 124 are symmetrically provided on the connecting rod 125, and the receiving pieces 123 on the two filter cartridges are staggeredly distributed.

[0062] Specifically, a torsion spring is provided between the connecting rod 125 and the lower movable ring 112 .

[0063] Furthermore, during the rotation of the movable cylinder 11, a knocking block 124 on the connecting rod 125 contacts the receiving piece 123 on the first filter cylinder 12, and the receiving piece 123 pushes the knocking block 124 and the connecting rod 125 to rotate and causes the torsion spring to accumulate elastic potential energy. The movable cylinder 11 continues to rotate, and the knocking block 124 separates from the receiving piece 123. The torsion spring releases the elastic potential energy, driving another knocking block 124 thereon to hit the receiving piece 123 on the second filter cylinder 122, and the receiving piece 123 drives the second filter cylinder 122 to shake.

[0064] As another embodiment further provided by the present invention, a scraper 1121 for collecting impurities on the liquid surface is provided on the lower movable ring 112 , and a movable block 121 extending below the liquid surface of the sealing liquid 136 is movably provided at the bottom of the first filter cartridge 12 .

[0065] Specifically, a drain pipe 135 is provided on the shell 1, a slope is provided on the movable block 121, a push block 1122 for cooperating with the slope on the movable block 121 is provided on the scraper rod 1121, and a channel for collecting impurities on the liquid surface of the sealing liquid 136 is provided on the scraper rod 1121, and the channel is connected to the drain pipe 135, and a spring is provided between the movable block 121 and the first filter cartridge 12.

[0066] Furthermore, after the gas is compressed, the gas is passed into the air inlet pipe 131, and the air inlet pipe 131 sends the compressed gas to the first filter cartridge 12. Under the guidance of the air inlet pipe 131, the gas contacts the sealing liquid 136, and the sealing liquid 136 absorbs part of the particulate matter and oil gas in the gas. Then the gas passes through the first filter cartridge 12 and comes into the cavity between the first filter cartridge 12 and the second filter cartridge 122. The first filter cartridge 12 filters out part of the particulate matter in the gas.

[0067] At the same time, a mixed liquid consisting of water and detergent enters the shell 1 from the liquid inlet pipe 137 and is poured on the movable cylinder 11. The movable bars 113 on the movable cylinder 11 receive the mixed liquid. The mixed liquid forms a water curtain on the movable bars 113 distributed in a linear array, thereby hindering the flow of gas. When the gas flows through the "∧"-shaped air channel 115 between the movable bars 113, the particles in the gas hit the bottom of the upper movable bar 113 under the action of inertia, and are then adsorbed by the mixed liquid on the movable bar 113. At the same time, the detergent in the mixed liquid reacts with the oil and gas in the gas to remove the oil and gas in the gas. In addition, the longer air inlet pipe 131 and the movable cylinder 11 can hinder the flow of gas, reduce the gas flow speed, and prevent the particles in the gas from hitting the filter cartridge at a faster speed and getting stuck in the deep part of the filter cartridge.

[0068] The gas passes through the second filter cartridge 122 and flows to the outside of the housing 1 through the exhaust pipe 132. At this time, the gas pushes the impeller 133 to rotate. The impeller 133 drives the transmission ring 1112 to rotate through the driving wheel 134 and the synchronous chain. The transmission ring 1112 drives the upper movable ring 111, the connecting column 1111 and the lower movable ring 112 to rotate. A knocking block 124 on the connecting rod 125 contacts the receiving piece 123 on the first filter cartridge 12. The receiving piece 123 pushes the knocking block 124 and the connecting rod 125 to rotate and causes the torsion spring to accumulate elastic potential energy. The movable cartridge 11 continues to rotate, and the knocking block 124 separates from the receiving piece 123. The torsion spring releases the elastic potential energy, driving another knocking block 124 thereon to hit the receiving piece 123 on the second filter cartridge 122. The receiving piece 123 carries The second filter cartridge 122 is moved to shake, and then a knocking block 124 on the connecting rod 125 contacts the receiving piece 123 on the second filter cartridge 122, and the receiving piece 123 pushes the knocking block 124 and the connecting rod 125 to rotate and causes the torsion spring to accumulate elastic potential energy. The movable cylinder 11 continues to rotate, the knocking block 124 is separated from the receiving piece 123, and the torsion spring releases the elastic potential energy, driving another knocking block 124 thereon to hit the receiving piece 123 on the first filter cartridge 12, and the receiving piece 123 drives the first filter cartridge 12 to shake, and some particles on the first filter cartridge 12 and the second filter cartridge 122 are shaken off. At this time, most of the particles will adhere to the water curtain on the movable cylinder 11 and flow downward with the water curtain to prevent the shaken particles from being suspended in the cavity and being moved by the gas.

[0069] While the movable cylinder 11 rotates, the scraper rod 1121 moves with the lower movable ring 112, and the push block 1122 on the scraper rod 1121 moves along the slope on the movable block 121, so that the movable block 121 shrinks into the first filter cylinder 12, and the channel on the scraper rod 1121 collects impurities on the surface of the sealing liquid 136 and discharges them through the drain pipe 135. After the scraper rod 1121 passes, the movable block 121 is reinserted into the sealing liquid 136 under the push of the spring to seal the bottom of the first filter cylinder 12.

[0070] Afterwards, the moisture in the compressed gas can be removed by using a dryer or other common technical knowledge in the art, and the dried gas can be supplied to the vacuum pump to provide shock gas for the vacuum pump.

[0071] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A circulating compressed air filtering mechanism, characterized in that: It comprises a housing (1), on which is provided: A first filter cartridge (12) covering the air inlet pipe (131) and a second filter cartridge (122) covering the first filter cartridge (12), wherein the first filter cartridge (12) and the second filter cartridge (122) are both provided with receiving plates (123) distributed in a circumferential array; A movable cylinder (11) is rotatably mounted on the housing (1) and is located between the first filter cylinder (12) and the second filter cylinder (122); a plurality of knocking blocks (124) are movably arranged on the movable cylinder (11); and movable bars (113) distributed in a linear array and used for guiding water flow are arranged on the movable cylinder (111), wherein: The movable cylinder (11) drives the knocking block (124) to knock the receiving sheet (123) to cause the first filter cylinder (12) and the second filter cylinder (122) to vibrate, and the plurality of movable bars (113) receive water flow to form a water curtain and absorb particulate matter between the first filter cylinder (12) and the second filter cylinder (122); A liquid inlet pipe (137) for the flow of a mixed liquid consisting of water and detergent is provided at the top of the shell (1), and the mixed liquid accumulates at the bottom of the inner side of the shell (1) to form a sealing liquid (136) that seals the bottom of the first filter cartridge 12 and the second filter cartridge (122).

2. A circulating compressed air filtering mechanism according to claim 1, characterized in that: The movable cylinder (11) comprises an upper movable ring (111), a lower movable ring (112) and a connecting column (1111) connecting the upper movable ring (111) and the lower movable ring (112), which are arranged in parallel. The connecting column (1111) supports a plurality of movable bars (113) to separate the first filter cylinder (12) and the second filter cylinder (122).

3. A circulating compressed air filtering mechanism according to claim 1, characterized in that: The cross section of the movable strip (113) is in a "∧" shape, and a "∧"-shaped air channel (115) is formed between two adjacent movable strips (113) to guide the airflow.

4. A circulating compressed air filtering mechanism according to claim 2, characterized in that: The connecting column (1111) is movably provided with a paddle (117) inside, and the paddle (117) moves to push the movable strip (113) to move, so that gaps (1132) for airflow to pass through appear between the movable strips (113).

5. A circulating compressed air filtering mechanism according to claim 4, characterized in that: A driving rod (118) is arranged inside the connecting column (1111), and the movable cylinder (11) rotates so that the driving rod (118) rotates relative to the movable cylinder (11), thereby driving the paddle (117) to reciprocate in the vertical direction.

6. A circulating compressed air filtering mechanism according to claim 2, characterized in that: A plurality of positioning blocks (116) for separating the movable bars (113) are arranged inside the connecting column (1111), and a spring is arranged between the positioning blocks (116) and the movable bars (113).

7. A circulating compressed air filtering mechanism according to claim 4, characterized in that: The paddle (117) is specifically an elastic sheet, and the paddle (117) moves to cause the notch (1132) to reciprocate in a vertical direction.

8. A circulating compressed air filtering mechanism according to claim 3, characterized in that: The movable bar (113) is provided with an inclined guide groove (1131) for guiding water flow into the air channel (115).

9. A circulating compressed air filtering mechanism according to claim 2, characterized in that: A connecting rod (125) is rotatably arranged on the lower movable ring (112), and knocking blocks (124) are symmetrically arranged on the connecting rod (125). The receiving pieces (123) on the two filter cartridges are staggered.

10. A circulating compressed air filtering mechanism according to claim 2, characterized in that: The lower movable ring (112) is provided with a scraper rod (1121) for collecting impurities on the liquid surface, and the bottom of the first filter cartridge (12) is movably provided with a movable block (121) extending below the liquid surface of the sealing liquid (136).

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