Screw air compressor with high-precision start-stop control

Abstract

The invention discloses a high-precision start-stop control screw air compressor, and relates to the technical field of screw air compressors. Comprising a filter chamber, a mounting frame is fixed on one side of the filter chamber, a filter mechanism is arranged in the filter chamber, one side of the filter chamber is connected with an input channel, and a support frame is arranged at the bottom of the filter chamber; the screw air compression chamber is mounted on the mounting frame, and the interior of the filter chamber is connected to the input end of the screw air compression chamber through a communicating pipe. By arranging the detection module, the control module and the cleaning mechanism, abnormal states such as blockage of the filtering mechanism and the like can be found in time, the cleaning mechanism is controlled in time for cleaning, and the blockage problem is automatically solved; by arranging the filter cartridge and the plugging assembly, plugging can be performed based on a unique plugging structure of the plugging assembly, gaps among the filter cartridge, the communicating pipe and the central column can be closed, and based on work of the lifting control assembly, the position of the filter cartridge can be adjusted, the plugged part of the filter cartridge can be moved out, cleaning is facilitated, and the unplugged part can be moved into a filter chamber for use.

Description

Technical Field

[0001] The invention relates to the technical field of screw air compressors, and in particular to a screw air compressor with high-precision start-stop control. Background Art

[0002] With the continuous advancement of industrialization, screw air compressors, as an efficient and energy-saving air compression equipment, have been widely used in industrial production. However, in actual use, affected by the working environment, screw air compressors often have various faults, such as filter blockage leading to unstable output air pressure. These problems not only affect the normal operation of the equipment, but also may cause production interruptions if not handled in time, causing economic losses to the company.

[0003] After searching, the Chinese patent application number CN202120767247.1 discloses a screw air compressor with a multiple filtering structure, including: a screw air compressor housing, a mounting base welded to the bottom of the screw air compressor housing, an exhaust port fixed to the lower left side of the screw air compressor housing; a drive shaft, which runs through the inside of the screw air compressor housing, and a power radial bearing is movably connected to the outer side of the right end of the drive shaft. The screw air compressor in the above patent has the following shortcomings: its filtering structure cannot be automatically cleaned, and blockage affects the output air pressure, which needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a screw air compressor with high-precision start-stop control.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A screw air compressor with high-precision start-stop control, comprising: A filter chamber, wherein a mounting frame is fixed on one side of the filter chamber, a filtering mechanism is arranged in the filter chamber, an input channel is connected to one side of the filter chamber, and a supporting frame is arranged at the bottom of the filter chamber; The screw air compression chamber is installed on the mounting frame, the inside of the filter chamber is connected to the input end of the screw air compression chamber through a connecting pipe, the output end of the screw air compression chamber is connected to the output pipe, and a screw air compression mechanism is arranged in the screw air compression chamber; A detection module is arranged at the output pipe and is used to detect the output condition of the output pipe; A control module, which is used to control the start and stop of the screw air compressor mechanism in the screw air compressor chamber; A cleaning mechanism is installed on the upper and lower sides of the filter chamber to clean the filter mechanism; The detection module detects the output speed of the output pipe, and the control module controls the screw air compressor mechanism to stop operating and the cleaning mechanism to clean the filter mechanism based on the detection information of the detection module when the detection value is not within the set range.

[0006] Preferably: the filtering mechanism comprises: The filter cartridge has circular openings at the top and bottom of the filter chamber. The filter cartridge is sealed and slides in the circular opening of the filter chamber. One end of the connecting pipe extends into the inside of the filter cartridge. The length of the filter cartridge is greater than twice the length of the filter chamber. Center column: the center column is installed on the support frame through a bracket, and the center column is concentric with the filter cartridge; A plugging assembly is installed in the filter cartridge. Two plugging assemblies are symmetrically arranged. The positions of the plugging assemblies correspond to the positions of the circular openings of the filter chambers. One plugging assembly is installed on the outside of the central column, and the other plugging assembly is installed on the outside of one end of the connecting pipe located in the filter cartridge. The lifting control component is used to control the lifting of the filter cartridge and adjust the position of the filter cartridge in the filter chamber.

[0007] Preferably, the blocking component comprises: An annular lifting seat, the inner side of which is sealed and slides on the center column or the outer wall of the connecting pipe; A support plate, which is installed on the outside of the central column or the outside of the connecting pipe; A sliding rod, the sliding rod is slidably connected to the inner wall of the support plate, the sliding rod and the support plate are connected by a spring, a first arc block or a second arc block is fixed to the end of the sliding rod, the first arc block and the second arc block are in an arc-shaped structure adapted to the inner wall of the filter cartridge, an arc-shaped sealing gasket is arranged on one side of the outer wall of the first arc block and the second arc block, the first arc block and the second arc block are staggered, and the distance from the first arc block to the filter cartridge is smaller than the distance from the second arc block to the filter cartridge; A toggle assembly is installed on the annular lifting seat, and based on the movement of the annular lifting seat, the sliding rod is toggled to push the first arc block and the second arc block outward; An annular retaining frame, which is slidably connected to the outer wall of the annular lifting seat up and down, the inner side of the bottom of the annular retaining frame and the bottom of the annular lifting seat are connected through an annular elastic connecting part, and a sealing gasket is arranged on the top of the annular retaining frame; Electric telescopic cylinder, the electric telescopic cylinder is installed on the central column or the connecting pipe, and the output end of the electric telescopic cylinder is fixed on the annular lifting seat; The width of the first arc block gradually decreases in the direction away from the filter cartridge, and the side surface of the second arc block is adapted to the side surface shape of the first arc block.

[0008] Preferably: the toggle assembly comprises: The pulley frame is installed on the annular lifting seat, and a guide plate is installed at the end of the slide rod away from the filter cartridge, and the position of the pulley frame is adapted to the guide plate; The roller is rotatably mounted on the pulley frame, the guide plate comprises a vertical plate and an inclined plate, the inclined plate is integrally arranged at the bottom end of the vertical plate, and the bottom end of the inclined plate extends toward the direction close to the filter cartridge; The horizontal distance between the roller and the vertical plate is adapted to the horizontal distance between the first arc block or the second arc block and the filter cartridge; the pulley frame corresponding to the first arc block is higher than the pulley frame corresponding to the second arc block.

[0009] Preferably, the first arc block and the second arc block are provided with arc grooves at the bottom, and when the first arc block and the second arc block reach the annular inner wall of the filter cartridge, the arc grooves are assembled to form an annular structure matching the annular retaining frame.

[0010] Preferably: the lifting control assembly includes: A lifting drive motor, side brackets are installed on both sides of the filter chamber, the lifting drive motor is installed on the side brackets, the upper and lower ends of the filter cartridge are connected with side connecting rods, the side connecting rods pass through the outside of the filter chamber, one side connecting rod is slidably connected to the inner wall of a side bracket, and a threaded column is fixed on the outside of the other side connecting rod; The screw barrel is rotatably mounted on a side bracket, the threaded column is connected to the screw barrel through threads, and a driven gear is mounted on the outside of the screw barrel; A driving gear, a shaft of the driving gear is drivingly connected to the output end of the lifting driving motor, and the driving gear is meshed with the driven gear.

[0011] Preferably: the cleaning mechanism comprises: Annular slideway, which is fixed at the upper and lower ends of the filter chamber; An annular slide seat, the annular slide seat is rotatably mounted on the inner wall of the annular slideway; An annular gear rack is installed on an annular slide seat, and evenly distributed cleaning brushes are arranged on the inner side of the annular gear rack, and the cleaning brushes are adapted to the filter cartridge; The rotating driving part is installed on the filter chamber and is used to drive the annular gear rack to rotate.

[0012] Preferably, the rotation driving unit comprises: A rotating drive motor is installed on the filter chamber; A rotation control gear, a shaft of which is transmission-connected to an output end of a rotation drive motor, and the rotation control gear is meshed with an annular gear rack.

[0013] Preferably: a drying mechanism is provided in the filter cartridge, and the drying mechanism comprises: Ring frames, two ring frames are respectively installed on the connecting pipe and the central column; A heating rod is installed on the annular frame and is located inside the movement path of the filter cartridge.

[0014] Preferably: a connecting arm is fixed to an outer wall of one side of the annular frame, an induction switch is arranged on the connecting arm, and the induction switch is located at the end of the movement path of the side connecting rod.

[0015] The beneficial effects of the present invention are: The present invention can timely detect abnormal conditions, such as blockage of the filter mechanism, by providing a detection module, a control module, and a cleaning mechanism, and can timely control the cleaning mechanism to perform cleaning, thereby automatically solving the blockage problem; by providing a filter cartridge and a blocking component, blocking can be performed based on the unique blocking structure of the blocking component, thereby sealing the gap between the filter cartridge and the connecting pipe and the center column, so that the gas is transported by the connecting pipe after filtration, thereby improving reliability; and based on the operation of the lifting control component, the position of the filter cartridge can be adjusted, the blocked portion of the filter cartridge can be moved out for easy cleaning, and the unblocked portion can be moved into the filter chamber for use.

[0016] The present invention provides structures such as the first arc block, the second arc block, the annular retaining frame and the toggle assembly. When blocking is required, the annular lifting seat can be driven to move based on the movement of the electric telescopic cylinder, so that the roller corresponding to the first arc block first contacts with its guide plate, and then the first arc block is pushed outward, and then the roller corresponding to the second arc block contacts with its guide plate, and the second arc block is pushed outward, so that the first arc block and the second arc block successively reach the annular inner wall of the filter cartridge; when the first arc block and the second arc block are moved into place, with the movement of the annular lifting seat, the sealing gasket on the top of the annular retaining frame fits with the bottom surface of the first arc block and the second arc block to achieve overall blocking.

[0017] In the present invention, since the width of the first arc block gradually decreases in the direction away from the filter cartridge, the side surface of the second arc block is adapted to the side surface shape of the first arc block, and the first arc block and the second arc block are controlled in sequence, the situation where the structure is stuck can be avoided and the reliability of fitting with the filter cartridge is guaranteed.

[0018] The present invention provides an arc groove, so that after the first arc block and the second arc block move into place, the annular retaining frame can be inserted into the arc groove when it rises, which not only improves the sealing effect, but also serves as a limiting support for the first arc block and the second arc block, thereby improving the stability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a screw air compressor with high-precision start-stop control proposed by the present invention; Figure 2 This is a structural schematic diagram from another angle of a screw air compressor with high-precision start-stop control proposed by the present invention; Figure 3 This is a structural schematic diagram of a filter chamber and a filter cartridge of a screw air compressor with high-precision start-stop control proposed by the present invention; Figure 4This is a schematic structural diagram of a cross-section of a filter chamber of a screw air compressor with high-precision start-stop control proposed by the present invention; Figure 5 This is a structural schematic diagram of a first arc block, a second arc block, and an annular retaining frame of a screw air compressor with high-precision start-stop control proposed by the present invention; Figure 6 This is a structural schematic diagram of a cross-sectional view of an annular lifting seat and an annular retaining frame of a screw air compressor with high-precision start-stop control proposed by the present invention.

[0020] In the figure: 1, filter chamber; 2, support frame; 3, screw air pressure chamber; 4, connecting pipe; 5, filter cartridge; 6, side connecting rod; 7, threaded column; 8, driven gear; 9, driving gear; 10, lifting drive motor; 11, mounting frame; 12, rotating drive motor; 13, input channel; 14, side bracket; 15, heating rod; 16, center column; 17, induction switch; 18, connecting arm; 19, annular frame; 20, electric telescopic cylinder; 21, annular slide seat; 22, annular slideway; 23, annular gear frame; 24, cleaning brush; 25, support plate; 26, first arc block; 27, second arc block; 28, annular retaining frame; 29, annular elastic connecting part; 30, annular lifting seat; 31, sealing gasket; 32, pulley frame; 33, guide plate; 34, spring; 35, slide rod; 36, arc sealing gasket; 37, arc groove; 38, roller. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. Example

[0023] A screw air compressor with high-precision start and stop control, such as Figure 1-6 As shown, including: A filter chamber 1, a mounting frame 11 is fixed to one side of the filter chamber 1, a filtering mechanism is arranged in the filter chamber 1, an input channel 13 is connected to one side of the filter chamber 1, and a supporting frame 2 is arranged at the bottom of the filter chamber 1; The screw air compression chamber 3 is mounted on the mounting frame 11. The interior of the filter chamber 1 is connected to the input end of the screw air compression chamber 3 through the connecting pipe 4. The output end of the screw air compression chamber 3 is connected to the output pipe. A screw air compression mechanism is arranged in the screw air compression chamber 3. The detection module is arranged at the output pipe and is used to detect the output conditions of the output pipe, such as output air pressure, flow rate, etc.; A control module, which is used to control the start and stop of the screw air compression mechanism in the screw air compression chamber 3; A cleaning mechanism is installed on the upper and lower sides of the filter chamber 1 to clean the filter mechanism; The detection module detects the output speed of the output pipe, and the control module controls the screw air compressor mechanism to stop working and the cleaning mechanism to clean the filter mechanism based on the detection information of the detection module when the detection value is not within the set range; By setting up a detection module, a control module, and a cleaning mechanism, abnormal conditions, such as clogging of the filter mechanism, can be discovered in time, and the cleaning mechanism can be controlled in time to perform cleaning, thereby automatically solving the clogging problem.

[0024] To facilitate cleaning; Figure 4-6 As shown, the filtering mechanism comprises: The filter cartridge 5 has circular openings at the top and bottom of the filter chamber 1. The filter cartridge 5 is sealed and slides in the circular opening of the filter chamber 1. One end of the connecting pipe 4 extends to the inside of the filter cartridge 5. The length of the filter cartridge 5 is greater than twice the length of the filter chamber 1. A center column 16, the center column 16 is mounted on the support frame 2 through a bracket, and the center column 16 is concentric with the filter cartridge 5; A plugging assembly is installed in the filter cartridge 5. Two plugging assemblies are symmetrically arranged. The positions of the plugging assemblies correspond to the positions of the circular openings of the filter chamber 1. One plugging assembly is installed on the outside of the central column 16, and the other plugging assembly is installed on the outside of one end of the connecting pipe 4 located in the filter cartridge 5. A lifting control component, which is used to control the lifting of the filter cartridge 5 and adjust the position of the filter cartridge 5 in the filter chamber 1; By providing the filter cartridge 5 and the sealing component, the gap between the filter cartridge 5 and the connecting pipe 4 and the center column 16 can be sealed based on the sealing of the sealing component, so that the gas is transported by the connecting pipe 4 after filtering, thereby improving reliability, and based on the operation of the lifting control component, the position of the filter cartridge 5 can be adjusted, the blocked part of the filter cartridge 5 can be removed for easy cleaning, and the unblocked part can be moved into the filter chamber 1 for use.

[0025] To facilitate blocking and unblocking; Figure 5 , Figure 6 As shown, the blocking component includes: An annular lifting seat 30, the inner side of which is sealed and slides on the central column 16 or the outer wall of the connecting pipe 4; A support plate 25, the support plate 25 is installed on the outside of the central column 16 or the outside of the connecting pipe 4; A slide rod 35, the slide rod 35 is slidably connected to the inner wall of the support plate 25, the slide rod 35 and the support plate 25 are connected by a spring 34, a first arc block 26 or a second arc block 27 is fixed to the end of the slide rod 35, the first arc block 26 and the second arc block 27 are in an arc-shaped structure adapted to the inner wall of the filter cartridge 5, an arc-shaped sealing gasket 36 is provided on one side outer wall of the first arc block 26 and the second arc block 27, the first arc block 26 and the second arc block 27 are staggered, and the distance from the first arc block 26 to the filter cartridge 5 is smaller than the distance from the second arc block 27 to the filter cartridge 5; A toggle assembly is installed on the annular lifting seat 30. Based on the movement of the annular lifting seat 30, the sliding rod 35 is toggled to push the first arc block 26 and the second arc block 27 outward; The annular retaining frame 28 is slidably connected to the outer wall of the annular lifting seat 30 up and down, and the inner side of the bottom of the annular retaining frame 28 and the bottom of the annular lifting seat 30 are connected through an annular elastic connecting portion 29, and a sealing gasket 31 is provided on the top of the annular retaining frame 28; The electric telescopic cylinder 20 is installed on the central column 16 or the connecting pipe 4, and the output end of the electric telescopic cylinder 20 is fixed on the annular lifting seat 30; The width of the first arc block 26 gradually decreases in the direction away from the filter cartridge 5 , and the side surface of the second arc block 27 is adapted to the side surface shape of the first arc block 26 .

[0026] In order to control the movement of the slide bar 35; Figure 6 As shown, the toggle assembly includes: The pulley frame 32 is installed on the annular lifting seat 30, and a guide plate 33 is installed at one end of the slide rod 35 away from the filter cartridge 5, and the position of the pulley frame 32 is adapted to the guide plate 33; The roller 38 is rotatably mounted on the pulley frame 32. The guide plate 33 includes a vertical plate and an inclined plate. The inclined plate is integrally arranged at the bottom end of the vertical plate, and the bottom end of the inclined plate extends toward the direction close to the filter cartridge 5. The horizontal distance between the roller 38 and the vertical plate is adapted to the horizontal distance between the first arc block 26 or the second arc block 27 and the filter cartridge 5; the pulley frame 32 corresponding to the first arc block 26 is higher than the pulley frame 32 corresponding to the second arc block 27; By setting the first arc block 26, the second arc block 27, the annular retaining frame 28 and the toggle assembly and other structures, when blocking is required, the annular lifting seat 30 can be driven to move based on the movement of the electric telescopic cylinder 20, so that the roller 38 corresponding to the first arc block 26 first contacts with its guide plate 33, and the first arc block 26 is pushed outward, and then the roller 38 corresponding to the second arc block 27 contacts with its guide plate 33, and the second arc block 27 is pushed outward, so that the first arc block 26 and the second arc block 27 successively reach the annular inner wall of the filter cartridge 5; because the width of the first arc block 26 gradually decreases in the direction away from the filter cartridge 5, the side surface of the second arc block 27 is adapted to the side surface shape of the first arc block 26, and the first arc block 26 and the second arc block 27 are controlled in sequence, which can avoid the situation where the structure is stuck and ensure the reliability of fitting with the filter cartridge 5; When the first arc block 26 and the second arc block 27 move to their proper positions, along with the movement of the annular lifting seat 30 , the sealing gasket 31 on the top of the annular retaining frame 28 fits with the bottom surfaces of the first arc block 26 and the second arc block 27 to achieve overall sealing.

[0027] In order to improve the sealing and structural stability during plugging; Figure 6 As shown, the first arc block 26 and the second arc block 27 have arc grooves 37 at their bottoms. When the first arc block 26 and the second arc block 27 reach the annular inner wall of the filter cartridge 5, the arc grooves 37 are assembled to form an annular structure that matches the annular retaining frame 28. By setting the arc groove 37, after the first arc block 26 and the second arc block 27 move into place, the annular retaining frame 28 can be inserted into the arc groove 37 when it rises, which not only improves the sealing effect, but also serves as a limiting support for the first arc block 26 and the second arc block 27, thereby improving the stability of the overall structure.

[0028] In order to facilitate the driving of the filter cartridge 5 up and down; Figure 1 , Figure 3 As shown, the lifting control assembly includes: A lifting drive motor 10 is provided, and side brackets 14 are installed on both sides of the filter chamber 1. The lifting drive motor 10 is installed on the side brackets 14. The upper and lower ends of the filter cartridge 5 are connected with side connecting rods 6. The side connecting rods 6 pass through the outside of the filter chamber 1. One side connecting rod 6 is slidably connected to the inner wall of one side bracket 14, and a threaded column 7 is fixed on the outside of the other side connecting rod 6. The screw barrel is rotatably mounted on a side bracket 14, the threaded column 7 is connected to the screw barrel through threads, and a driven gear 8 is installed on the outside of the screw barrel; A driving gear 9, the shaft of which is in driving connection with the output end of the lifting driving motor 10, and the driving gear 9 is meshed with the driven gear 8; By setting up a lifting control component, based on the operation of the lifting drive motor 10, the driving gear 9 drives the driven gear 8 to rotate, and then drives the side connecting rod 6 to rise and fall, so as to achieve the purpose of controlling the lifting of the filter cartridge 5. Since the side connecting rod 6 is set on the outside of the filter chamber 1, the movement interference of the structure is avoided.

[0029] In order to facilitate the cleaning of the filter cartridge 5; Figure 4 As shown, the cleaning mechanism comprises: An annular slide 22, the annular slide 22 is fixed at the upper and lower ends of the filter chamber 1; An annular slide 21, the annular slide 21 is rotatably mounted on the inner wall of the annular slideway 22; An annular gear rack 23, the annular gear rack 23 is mounted on the annular slide 21, and evenly distributed cleaning brushes 24 are arranged on the inner side of the annular gear rack 23, and the cleaning brushes 24 are adapted to the filter cartridge 5; A rotation driving unit, which is installed on the filter chamber 1 and is used to drive the annular gear rack 23 to rotate; By providing a cleaning mechanism, when the filter cartridge 5 moves, the rotating drive unit can work to drive the annular gear rack 23 to rotate, and then the filter cartridge 5 can be cleaned by the cleaning brush 24 to eliminate blockage.

[0030] In order to drive the annular gear rack 23 to rotate; Figure 2 , Figure 4 As shown, the rotation driving unit includes: A rotation drive motor 12 is installed on the filter chamber 1; The rotation control gear, the shaft of which is transmission-connected to the output end of the rotation drive motor 12 , is meshed with the annular gear rack 23 . Example

[0031] A screw air compressor with high-precision start and stop control, such as Figure 3 , Figure 4 As shown, in order to facilitate drying the filter cartridge 5, this embodiment makes the following improvements on the basis of embodiment 1: a drying mechanism is provided in the filter cartridge 5, and the drying mechanism includes: Annular frames 19, two annular frames 19 are respectively installed on the connecting pipe 4 and the central column 16; A heating rod 15, which is mounted on the annular frame 19 and is located inside the movement path of the filter cartridge 5; By providing a drying mechanism, the filter cartridge 5 can be dried when needed, such as when the air is humid or the filter cartridge 5 is wet due to cleaning operations, and the passing air can also be heated, thereby meeting different needs.

[0032] In order to facilitate the control of the work of the heating rod 15; Figure 3 , Figure 4 As shown, a connecting arm 18 is fixed to an outer wall of one side of the annular frame 19, and an induction switch 17 is provided on the connecting arm 18. The induction switch 17 is located at the end of the movement path of the side link 6; By providing the connecting arm 18 and the induction switch 17, the position of the structure can be determined based on whether the induction switch 17 is triggered, or various mechanisms can be controlled, such as stopping the cleaning mechanism or operating the drying mechanism.

[0033] The above description is only a preferred specific implementation mode of the present invention. For the parts not disclosed in detail, such as specific circuit connection methods or instrument models, those skilled in the art can use conventional technical means to implement them, so they are not elaborated here.

Claims

1. A screw air compressor with high-precision start-stop control, characterized in that: include: A filter chamber (1), wherein a mounting frame (11) is fixed to one side of the filter chamber (1), a filtering mechanism is arranged in the filter chamber (1), an input channel (13) is connected to one side of the filter chamber (1), and a supporting frame (2) is arranged at the bottom of the filter chamber (1); A screw air compression chamber (3), the screw air compression chamber (3) is mounted on a mounting frame (11), the interior of the filter chamber (1) is connected to the input end of the screw air compression chamber (3) via a connecting pipe (4), the output end of the screw air compression chamber (3) is connected to the output pipe, and a screw air compression mechanism is provided in the screw air compression chamber (3); A detection module is arranged at the output pipe and is used to detect the output condition of the output pipe; A control module, the control module is used to control the start and stop of the screw air compressor mechanism in the screw air compressor chamber (3); A cleaning mechanism, the cleaning mechanism being installed on the upper and lower sides of the filter chamber (1) and being used for cleaning the filter mechanism; The detection module detects the output speed of the output pipe, and the control module controls the screw air compressor mechanism to stop operating and the cleaning mechanism to clean the filter mechanism based on the detection information of the detection module when the detection value is not within the set range.

2. A screw air compressor with high-precision start-stop control according to claim 1, characterized in that: The filtering mechanism comprises: A filter cartridge (5), wherein the filter chamber (1) is provided with circular openings at the top and bottom, the filter cartridge (5) is sealed and slides up and down in the circular openings of the filter chamber (1), one end of the connecting pipe (4) extends into the interior of the filter cartridge (5), and the length of the filter cartridge (5) is greater than twice the length of the filter chamber (1); A center column (16), the center column (16) is mounted on the support frame (2) through a bracket, and the center column (16) is concentric with the filter cartridge (5); A plugging assembly, the plugging assembly is installed in the filter cartridge (5), the two plugging assemblies are symmetrically arranged, the positions of the plugging assemblies correspond to the positions of the circular openings of the filter chamber (1), one plugging assembly is installed on the outside of the central column (16), and the other plugging assembly is installed on the outside of one end of the connecting pipe (4) located in the filter cartridge (5); A lifting control component is used to control the lifting of the filter cartridge (5) and adjust the position of the filter cartridge (5) in the filter chamber (1).

3. A screw air compressor with high-precision start-stop control according to claim 2, characterized in that: The blocking component comprises: An annular lifting seat (30), the inner side of the annular lifting seat (30) sealingly slides on the outer wall of the central column (16) or the connecting pipe (4); A support plate (25), the support plate (25) being mounted on the outside of the central column (16) or the outside of the connecting pipe (4); A slide rod (35), the slide rod (35) is slidably connected to the inner wall of the support plate (25), the slide rod (35) and the support plate (25) are connected via a spring (34), a first arc block (26) or a second arc block (27) is fixed to the end of the slide rod (35), the first arc block (26) and the second arc block (27) are in an arc-shaped structure adapted to the inner wall of the filter cartridge (5), an arc-shaped sealing gasket (36) is provided on one side outer wall of the first arc block (26) and the second arc block (27), the first arc block (26) and the second arc block (27) are staggered, and the distance from the first arc block (26) to the filter cartridge (5) is smaller than the distance from the second arc block (27) to the filter cartridge (5); A toggle assembly, the toggle assembly being mounted on the annular lifting seat (30), and based on the movement of the annular lifting seat (30), the sliding rod (35) is toggled to push the first arc block (26) and the second arc block (27) outwards; an annular retaining frame (28), the annular retaining frame (28) being slidably connected to the outer wall of the annular lifting seat (30) in an up-and-down manner, the inner side of the bottom of the annular retaining frame (28) and the bottom of the annular lifting seat (30) being connected via an annular elastic connecting portion (29), and a sealing gasket (31) being provided at the top of the annular retaining frame (28); An electric telescopic cylinder (20), the electric telescopic cylinder (20) being mounted on the central column (16) or the connecting pipe (4), and an output end of the electric telescopic cylinder (20) being fixed on the annular lifting seat (30); The width of the first arc block (26) gradually decreases in a direction away from the filter cartridge (5), and the side surface of the second arc block (27) is adapted to the shape of the side surface of the first arc block (26).

4. A screw air compressor with high-precision start-stop control according to claim 3, characterized in that: The toggle assembly comprises: A pulley frame (32), the pulley frame (32) is mounted on the annular lifting seat (30), a guide plate (33) is mounted on one end of the slide rod (35) away from the filter cartridge (5), and the position of the pulley frame (32) is adapted to the guide plate (33); A roller (38), the roller (38) being rotatably mounted on the pulley frame (32), the guide plate (33) comprising a vertical plate and an inclined plate, the inclined plate being integrally arranged at the bottom end of the vertical plate, the bottom end of the inclined plate extending in a direction close to the filter cartridge (5); The horizontal distance between the roller (38) and the vertical plate matches the horizontal distance between the first arc block (26) or the second arc block (27) and the filter cartridge (5); the pulley frame (32) corresponding to the first arc block (26) is higher than the pulley frame (32) corresponding to the second arc block (27).

5. The screw air compressor with high-precision start-stop control according to claim 3 is characterized in that: The first arc block (26) and the second arc block (27) are provided with arc-shaped grooves (37) at the bottom. When the first arc block (26) and the second arc block (27) reach the annular inner wall of the filter cartridge (5), the arc-shaped grooves (37) are assembled to form an annular structure that matches the annular retaining frame (28).

6. A screw air compressor with high-precision start-stop control according to claim 2, characterized in that: The lifting control assembly comprises: A lifting drive motor (10), side brackets (14) are installed on both sides of the filter chamber (1), the lifting drive motor (10) is installed on the side brackets (14), the upper and lower ends of the filter cartridge (5) are connected to side connecting rods (6), the side connecting rods (6) are passed outside the filter chamber (1), one side connecting rod (6) is slidably connected to the inner wall of one side bracket (14), and a threaded column (7) is fixed to the outside of the other side connecting rod (6); A screw barrel, the screw barrel is rotatably mounted on a side bracket (14), the threaded column (7) is connected to the screw barrel through a thread, and a driven gear (8) is mounted on the outer side of the screw barrel; A driving gear (9) is provided, wherein the shaft of the driving gear (9) is drivingly connected to the output end of the lifting driving motor (10), and the driving gear (9) is meshed with the driven gear (8).

7. A screw air compressor with high-precision start-stop control according to claim 4, characterized in that: The cleaning mechanism comprises: An annular slideway (22), the annular slideway (22) being fixed at the upper and lower ends of the filter chamber (1); An annular slide seat (21), the annular slide seat (21) is rotatably mounted on the inner wall of the annular slideway (22); An annular gear rack (23), the annular gear rack (23) being mounted on the annular slide seat (21), the inner side of the annular gear rack (23) being provided with evenly distributed cleaning brushes (24), the cleaning brushes (24) being adapted to the filter cartridge (5); A rotation drive unit is mounted on the filter chamber (1) and is used to drive the annular gear rack (23) to rotate.

8. A screw air compressor with high-precision start-stop control according to claim 7, characterized in that: The rotation driving unit comprises: A rotation drive motor (12), wherein the rotation drive motor (12) is mounted on the filter chamber (1); A rotation control gear, the shaft of which is in driving connection with the output end of the rotation drive motor (12), and the rotation control gear is meshed with the annular gear rack (23).

9. The screw air compressor with high-precision start-stop control according to claim 4, characterized in that: The filter cartridge (5) is provided with a drying mechanism, which comprises: annular frames (19), wherein two annular frames (19) are respectively mounted on the connecting pipe (4) and the central column (16); A heating rod (15) is mounted on the annular frame (19), and the heating rod (15) is located inside the movement path of the filter cartridge (5).

10. A screw air compressor with high-precision start-stop control according to claim 9, characterized in that: A connecting arm (18) is fixed to an outer wall of one side of the annular frame (19), and an induction switch (17) is provided on the connecting arm (18). The induction switch (17) is located at the end of the movement path of the side connecting rod (6).

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