A screw air compressor with high precision start-stop control

Abstract

The application discloses a kind of high-precision start-stop control screw air compressor, it is related to screw air compressor technical field;Including: filter chamber, the filter chamber side is fixed with mounting bracket, filter mechanism is provided in filter chamber, the side of filter chamber is connected with input channel, support frame is provided at the bottom of filter chamber;Screw air compression chamber, screw air compression chamber is installed on mounting bracket, filter chamber is connected with the input end of screw air compression chamber by communicating pipe inside.The detection module, control module, cleaning mechanism are set in the application, abnormal state, such as filter mechanism blockage and the like, can be found in time, and cleaning mechanism is controlled in time to clean, and blockage problem is automatically solved;By setting filter cartridge, plugging component, it can be plugged based on the unique plugging structure of plugging component, the gap between filter cartridge and communicating pipe, center column is closed, and based on the work of lifting control component, the position of filter cartridge can be adjusted, the part of filter cartridge blockage is moved out, it is convenient to clean, the part of unblockage is moved into filter chamber and used.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of screw air compressors, and particularly relates to a screw air compressor with high-precision start-stop control. BACKGROUND

[0002] With the continuous advancement of industrialization, screw air compressors, as a kind of efficient and energy-saving air compression equipment, have been widely used in industrial production. However, in the actual use process, affected by the working environment and the like, various faults often occur in the screw air compressor, such as the output air pressure instability caused by the filter mechanism blockage. These problems not only affect the normal operation of the equipment, but also may cause production interruption and economic losses to the enterprise if not handled in time.

[0003] Through retrieval, a patent with Chinese patent application number CN202120767247.1 discloses a screw air compressor with multiple filtering structures, which comprises a screw air compressor shell, a mounting base is welded at the bottom end of the screw air compressor shell, and an exhaust port is fixed at the lower side of the left end of the screw air compressor shell; a driving shaft penetrates the inside of the screw air compressor shell, and a power radial bearing is movably connected to the outer side of the right end of the driving shaft. The screw air compressor in the above patent has the following deficiencies: the filtering structure cannot be automatically cleaned, and the output air pressure is affected when blockage occurs, which still needs to be improved. SUMMARY

[0004] The present application aims to solve the problems existing in the prior art and provides a screw air compressor with high-precision start-stop control.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A screw air compressor with high-precision start-stop control comprises:

[0007] A filter chamber is fixed with a mounting bracket on one side, a filter mechanism is arranged in the filter chamber, an input channel is connected to one side of the filter chamber, and a support bracket is arranged at the bottom of the filter chamber;

[0008] A screw air compression chamber is mounted on the mounting bracket, the filter chamber is connected to the input end of the screw air compression chamber through a communication pipe, the output end of the screw air compression chamber is connected to an output pipe, and a screw air compression mechanism is arranged in the screw air compression chamber;

[0009] A detection module is arranged at the output pipe and used for detecting the output condition of the output pipe;

[0010] A control module is used for controlling the start-stop of the screw air compression mechanism in the screw air compression chamber;

[0011] A cleaning mechanism is mounted on the upper and lower sides of the filter chamber and used for cleaning the filter mechanism.

[0012] The detection module implements detection output pipe output speed, and the control module controls the screw air compression mechanism to stop operation based on the detection information of the detection module when the detection value is not in the set interval, and the cleaning mechanism performs cleaning treatment on the filtering mechanism.

[0013] Preferably, the filtering mechanism comprises:

[0014] The filter cartridge is sealed and slidably arranged in the circular opening of the filter chamber in an up-down manner, one end of the communication pipe extends into the filter cartridge, and the length of the filter cartridge is greater than twice the length of the filter chamber.

[0015] The center column is mounted on the support frame through the support, and the center column is concentric with the filter cartridge.

[0016] The plugging assembly is mounted in the filter cartridge, 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, one plugging assembly is mounted on the outer side of the center column, and the other plugging assembly is mounted on the outer side of the end of the communication pipe located in the filter cartridge.

[0017] The lifting control assembly is used to control the lifting of the filter cartridge and adjust the position of the filter cartridge in the filter chamber.

[0018] Preferably, the plugging assembly comprises:

[0019] The annular lifting seat is sealed and slidably arranged on the inner side of the center column or the outer wall of the communication pipe.

[0020] The support plate is mounted on the outer side of the center column or the outer side of the communication pipe.

[0021] The sliding rod is slidably connected to the inner wall of the support plate, the sliding rod and the support plate are connected through a spring, the end of the sliding rod is fixed with a first arc block or a second arc block, the first arc block and the second arc block are in an arc structure matched with the inner wall of the filter cartridge, the outer wall of one side of the first arc block and the second arc block is provided with an arc-shaped sealing gasket, the first arc block and the second arc block are staggered, and the distance from the first arc block to the filter cartridge is less than the distance from the second arc block to the filter cartridge.

[0022] The actuating assembly is mounted on the annular lifting seat, and based on the movement of the annular lifting seat, the actuating sliding rod pushes the first arc block and the second arc block outward.

[0023] The annular stop frame is slidably connected to the outer wall of the annular lifting seat in an up-down manner, the inner side of the bottom of the annular stop frame is connected to the bottom of the annular lifting seat through an annular elastic connecting part, and the top of the annular stop frame is provided with a sealing ring.

[0024] The electric telescopic cylinder is mounted on the center column or the communication pipe, and the output end of the electric telescopic cylinder is fixed to the annular lifting seat.

[0025] 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 shaped to match the side surface of the first arc block.

[0026] Preferably, the dial assembly comprises:

[0027] The pulley frame is mounted on the annular lifting seat, and the guide plate is mounted on the end of the slide away from the filter cartridge, and the position of the pulley frame is matched with the guide plate.

[0028] The roller is rotatably mounted on the pulley frame, and the guide plate comprises a vertical plate and an inclined plate, and the inclined plate is integrally provided at the bottom end of the vertical plate, and the bottom end of the inclined plate extends towards the filter cartridge.

[0029] The horizontal distance between the roller and the vertical plate is matched with the horizontal distance between the first arc block or the second arc block and the filter cartridge, and the height of the pulley frame corresponding to the first arc block is higher than that of the pulley frame corresponding to the second arc block.

[0030] Preferably, the first arc block and the second arc block are provided with arc-shaped 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-shaped grooves are combined to form an annular structure matched with the annular stopper.

[0031] Preferably, the lifting control assembly comprises:

[0032] The lifting drive motor is mounted on the side bracket, and the upper and lower ends of the filter chamber are connected with side connecting rods, and the side connecting rods pass outside the filter chamber, one side connecting rod is slidingly connected to the inner wall of one side bracket, and the other side connecting rod is fixed with a threaded column outside.

[0033] The screw cylinder is rotatably mounted on one side bracket, and the threaded column is connected with the screw cylinder through threads, and the screw cylinder is provided with a driven gear outside.

[0034] The drive gear is in transmission connection with the output end of the lifting drive motor, and the drive gear is in meshing connection with the driven gear.

[0035] Preferably, the cleaning mechanism comprises:

[0036] The annular slide is fixed to the upper and lower ends of the filter chamber.

[0037] The annular slide seat is rotatably mounted on the inner wall of the annular slide.

[0038] The annular gear rack is mounted on the annular slide seat, and the inner side of the annular gear rack is provided with uniformly distributed cleaning brushes matched with the filter cartridge.

[0039] The rotating drive part is mounted on the filter chamber for driving the annular gear rack to rotate.

[0040] Preferably, the rotating driving part comprises:

[0041] A rotating driving motor is installed on the filter chamber.

[0042] A rotating control gear, the shaft of which is in transmission connection with the output end of the rotating driving motor, is in meshing connection with the annular rack.

[0043] Preferably, the filter cartridge is provided with a drying mechanism, which comprises:

[0044] Two annular racks are respectively installed on the communication pipe and the center column.

[0045] A heating rod is installed on the annular rack and is located inside the movement path of the filter cartridge.

[0046] Preferably, a connecting arm is fixed to one side of the outer wall of the annular rack, and an inductive switch is arranged on the connecting arm and located at the end of the movement path of the side connecting rod.

[0047] The present application has the following beneficial effects:

[0048] The present application can timely find abnormal conditions such as filter blockage and timely control the cleaning mechanism to clean and automatically solve the blockage problem by arranging the detection module, the control module and the cleaning mechanism. The present application can block based on the unique blocking structure of the blocking assembly, close the gap between the filter cartridge and the communication pipe and the center column, and convey the filtered gas by the communication pipe, thereby improving the reliability. Based on the work of the lifting control assembly, the position of the filter cartridge can be adjusted, the blocked part of the filter cartridge is moved out, the unblocked part of the filter cartridge is moved into the filter chamber for use, and the cleaning is facilitated.

[0049] The present application can drive the annular lifting seat to move based on the movement of the electric telescopic cylinder when blocking is needed, and then make the roller corresponding to the first arc block first contact with its guide plate, and then push the first arc block outward, and then make the roller corresponding to the second arc block contact with its guide plate, and then push the second arc block outward, so that the first arc block and the second arc block reach the annular inner wall of the filter cartridge in sequence. When the first arc block and the second arc block are moved into position, the sealing gasket at the top of the annular blocking frame is attached to the bottom surface of the first arc block and the second arc block with the movement of the annular lifting seat, thereby realizing overall blocking.

[0050] The width of the first arc block gradually decreases away from the filter cartridge, the side surface of the second arc block is adapted to the side surface of the first arc block, and the first arc block and the second arc block are controlled in sequence, so that the structure is prevented from being stuck and the reliability of the attachment to the filter cartridge is ensured.

[0051] The present application can be clamped into the arc-shaped groove when the annular stopper rises after the first arc block and the second arc block are moved to the position, not only improving the sealing effect, but also playing a limiting support role on the first arc block and the second arc block, and improving the stability of the overall structure. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 A structural schematic diagram of a high-precision start-stop control screw air compressor is provided.

[0053] Figure 2 A structural schematic diagram of a high-precision start-stop control screw air compressor from another angle is provided.

[0054] Figure 3 A structural schematic diagram of a filter chamber and filter cartridge of a high-precision start-stop control screw air compressor is provided.

[0055] Figure 4 A structural schematic diagram of a filter chamber of a high-precision start-stop control screw air compressor is provided.

[0056] Figure 5 A structural schematic diagram of a first arc block, a second arc block and an annular stopper of a high-precision start-stop control screw air compressor is provided.

[0057] Figure 6 A structural schematic diagram of an annular lifting seat and an annular stopper of a high-precision start-stop control screw air compressor is provided.

[0058] In the figure: 1, filter chamber; 2, support frame; 3, screw air compression chamber; 4, communication pipe; 5, filter cartridge; 6, side connecting rod; 7, threaded column; 8, driven gear; 9, driving gear; 10, lifting driving motor; 11, mounting frame; 12, rotating driving motor; 13, input channel; 14, side support; 15, heating rod; 16, center column; 17, inductive switch; 18, connecting arm; 19, annular frame; 20, electric telescopic cylinder; 21, annular sliding seat; 22, annular slide; 23, annular gear frame; 24, cleaning brush; 25, support plate; 26, first arc block; 27, second arc block; 28, annular stopper; 29, annular elastic connecting part; 30, annular lifting seat; 31, sealing washer; 32, pulley frame; 33, guide plate; 34, spring; 35, sliding rod; 36, arc-shaped sealing washer; 37, arc-shaped groove; 38, roller. DETAILED DESCRIPTION

[0059] The technical solutions of the present application will be further described in detail below in combination with specific embodiments.

[0060] Embodiments of the present application are described below in detail with reference to the drawings, examples of which are shown in the drawings, wherein the same or similar notations are used to represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used to explain the present application, and are not to be understood as limiting the present application. Embodiments

[0061] A screw air compressor with high precision start-stop control, as shown in Figures 1-6 comprises:

[0062] A filter chamber 1, one side of which is fixed with a mounting frame 11, and a filter mechanism is arranged in the filter chamber 1. One side of the filter chamber 1 is connected with an input channel 13, and a support frame 2 is arranged at the bottom of the filter chamber 1.

[0063] A screw air compression chamber 3, which is mounted on the mounting frame 11. The filter chamber 1 is connected to the input end of the screw air compression chamber 3 through a communication pipe 4, and the output end of the screw air compression chamber 3 is connected with an output pipe. A screw air compression mechanism is arranged in the screw air compression chamber 3.

[0064] A detection module, which is arranged at the output pipe, is used to detect the output condition of the output pipe, such as output air pressure, flow, etc.

[0065] A control module, which is used to control the start-stop of the screw air compression mechanism in the screw air compression chamber 3.

[0066] A cleaning mechanism, which is mounted on the upper and lower sides of the filter chamber 1, is used to clean the filter mechanism.

[0067] The detection module detects the output speed of the output pipe, and the control module controls the screw air compression mechanism to stop working based on the detection information of the detection module. When the detection value is not within the set range, the cleaning mechanism is used to clean the filter mechanism.

[0068] By arranging the detection module, the control module and the cleaning mechanism, the abnormal state, such as the blockage of the filter mechanism, can be found in time, and the cleaning mechanism can be controlled to clean in time, so as to automatically solve the blockage problem.

[0069] In order to facilitate cleaning, as shown in Figures 4-6 the filter mechanism comprises:

[0070] A filter cartridge 5, the top and bottom of which are provided with round openings, and the filter cartridge 5 is sealingly and slidably arranged in the round openings of the filter chamber 1. One end of the communication pipe 4 extends into the filter cartridge 5, and the length of the filter cartridge 5 is greater than twice the length of the filter chamber 1.

[0071] A center column 16, which is mounted on the support frame 2 through a support, and is concentric with the filter cartridge 5.

[0072] The blocking assembly is installed in the filter cartridge 5, two blocking assemblies are symmetrically arranged, the positions of the blocking assemblies correspond to the positions of the round openings of the filter chamber 1, one blocking assembly is installed outside the central column 16, and the other blocking assembly is installed outside one end of the communicating pipe 4 in the filter cartridge 5.

[0073] The lifting control assembly is used for controlling the lifting of the filter cartridge 5, and adjusting the position of the filter cartridge 5 in the filter chamber 1.

[0074] By arranging the filter cartridge 5 and the blocking assembly, the gap between the filter cartridge 5, the communicating pipe 4 and the central column 16 can be closed based on the blocking of the blocking assembly, so that the filtered gas is conveyed by the communicating pipe 4, the reliability is improved, and based on the working of the lifting control assembly, the position of the filter cartridge 5 can be adjusted, the blocked part of the filter cartridge 5 is moved out, the cleaning is facilitated, and the unblocked part is moved into the filter chamber 1 for use.

[0075] In order to facilitate blocking and unblocking, as shown in Figure 5 、 Figure 6 The blocking assembly comprises:

[0076] The annular lifting seat 30 is sealed and slid on the outer wall of the central column 16 or the communicating pipe 4;

[0077] The support plate 25 is installed outside the central column 16 or the communicating pipe 4;

[0078] 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 through the spring 34, the end of the slide rod 35 is fixed with the first arc block 26 or the second arc block 27, the first arc block 26 and the second arc block 27 are in an arc structure matched with the inner wall of the filter cartridge 5, the outer wall of one side of the first arc block 26 and the second arc block 27 is provided with the arc-shaped sealing gasket 36, 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 less than the distance from the second arc block 27 to the filter cartridge 5;

[0079] The pushing assembly is installed on the annular lifting seat 30, and the slide rod 35 is pushed outwards based on the movement of the annular lifting seat 30, so as to push the first arc block 26 and the second arc block 27 outwards;

[0080] The annular stopper 28 is slidably connected to the outer wall of the annular lifting seat 30, the bottom inner side of the annular stopper 28 and the bottom of the annular lifting seat 30 are connected through the annular elastic connecting part 29, and the top of the annular stopper 28 is provided with the sealing gasket 31.

[0081] The electric telescopic cylinder 20 is installed on the central column 16 or the communicating pipe 4, and the output end of the electric telescopic cylinder 20 is fixed to the annular lifting seat 30.

[0082] The width of the first arc block 26 gradually decreases in the direction away from the filter cartridge 5, and the side of the second arc block 27 is adapted to the side shape of the first arc block 26.

[0083] To control the movement of slider 35; such as Figure 6 As shown, the toggle assembly includes:

[0084] A pulley frame 32 is mounted on an annular lifting seat 30. A guide plate 33 is installed at the end of the slide rod 35 away from the filter cartridge 5. The position of the pulley frame 32 is adapted to the guide plate 33.

[0085] Roller 38 is rotatably mounted on pulley frame 32. Guide plate 33 includes vertical plate and inclined plate. Inclined plate is integrally set at the bottom end of vertical plate. The bottom end of inclined plate extends toward the filter cartridge 5.

[0086] 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 cylinder 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.

[0087] By setting up structures such as the first arc block 26, the second arc block 27, the annular baffle 28, and the actuating assembly, when sealing is required, the movement of the electric telescopic cylinder 20 drives the annular lifting seat 30 to move, thereby causing the roller 38 corresponding to the first arc block 26 to first contact its guide plate 33, pushing the first arc block 26 outward. Subsequently, the roller 38 corresponding to the second arc block 27 contacts its guide plate 33, pushing the second arc block 27 outward, so that the first arc block 26 and the second arc block 27 reach the annular inner wall of the filter cartridge 5 one after the other. Since the width of the first arc block 26 gradually decreases in the direction away from the filter cartridge 5, and the side shape of the second arc block 27 matches the side shape of the first arc block 26, and the first arc block 26 and the second arc block 27 are controlled sequentially, the situation of structural jamming can be avoided, ensuring the reliability of the fit with the filter cartridge 5.

[0088] When the first arc block 26 and the second arc block 27 are in place, with the movement of the annular lifting seat 30, the sealing gasket 31 on the top of the annular baffle 28 fits against the bottom surface of the first arc block 26 and the second arc block 27, achieving overall sealing.

[0089] To improve sealing performance and structural stability during sealing; such as Figure 6 As shown, the bottom of the first arc block 26 and the second arc block 27 are provided with arc grooves 37. 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 is compatible with the annular baffle 28.

[0090] By setting the arc-shaped groove 37, the annular retaining frame 28 can be clamped into the arc-shaped groove 37 when it rises after the first arc block 26 and the second arc block 27 are moved into position, not only improving the sealing effect, but also supporting the first arc block 26 and the second arc block 27, thereby improving the stability of the overall structure.

[0091] In order to facilitate the lifting of the filter cartridge 5, as shown in Figure 1 、 Figure 3 , the lifting control assembly comprises:

[0092] The lifting drive motor 10 is installed on the side bracket 14 on both sides of the filter chamber 1, and the upper and lower ends of the filter cartridge 5 are connected with the side connecting rod 6 which passes through the outside of the filter chamber 1. One side connecting rod 6 is slidingly connected to the inner wall of one side bracket 14, and the other side connecting rod 6 is fixed with a threaded column 7 on the outside.

[0093] The screw cylinder is rotatably installed on one side bracket 14, and the threaded column 7 is connected with the screw cylinder through threads. The screw cylinder is installed with a driven gear 8 on the outside.

[0094] The drive gear 9 is in transmission connection with the output end of the lifting drive motor 10, and the drive gear 9 is in engagement with the driven gear 8.

[0095] By setting the lifting control assembly, based on the work of the lifting drive motor 10, the driven gear 8 is driven to rotate through the drive gear 9, and then the side connecting rod 6 is lifted, so as to control the lifting of the filter cartridge 5. Since the side connecting rod 6 is arranged on the outside of the filter chamber 1, the motion interference of the structure is avoided.

[0096] In order to facilitate the cleaning of the filter cartridge 5, as shown in Figure 4 , the cleaning mechanism comprises:

[0097] The annular slide 22 is fixed to the upper and lower ends of the filter chamber 1.

[0098] The annular slide 22 is fixed to the upper and lower ends of the filter chamber 1.

[0099] The annular slide 22 is fixed to the upper and lower ends of the filter chamber 1.

[0100] The rotating drive part is installed on the filter chamber 1 and is used to drive the annular rack 23 to rotate.

[0101] By setting the cleaning mechanism, when the filter cartridge 5 moves, the annular rack 23 is driven to rotate based on the work of the rotating drive part, and then the filter cartridge 5 is cleaned by the cleaning brush 24, so as to eliminate the blockage.

[0102] In order to drive the rotation of the annular rack 23, as shown in Figure 2 、 Figure 4 the rotation driving part comprises:

[0103] a rotation driving motor 12, which is installed on the filter chamber 1;

[0104] a rotation control gear, the shaft of which is in transmission connection with the output end of the rotation driving motor 12, and the rotation control gear is in engagement with the annular rack 23. Embodiment

[0105] A screw air compressor with high start-stop control, as shown in Figure 3 、 Figure 4 in order to facilitate the drying of the filter cartridge 5, the embodiment is improved on the basis of the embodiment 1 as follows: the filter cartridge 5 is provided with a drying mechanism, which comprises:

[0106] two annular racks 19, each of which is installed on the communicating pipe 4 and the center column 16;

[0107] a heating rod 15, which is installed on the annular rack 19 and is located inside the movement path of the filter cartridge 5;

[0108] By setting the 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 operation, and the passing air can also be heated to meet different needs.

[0109] In order to facilitate the control of the working of the heating rod 15, as shown in Figure 3 、 Figure 4 the outer wall of one side of the annular rack 19 is fixed with a connecting arm 18, and the connecting arm 18 is provided with an induction switch 17, which is located at the end of the movement path of the side connecting rod 6;

[0110] By setting the connecting arm 18 and the induction switch 17, the position of the structure can be judged or each mechanism can be controlled, such as the stop of the cleaning mechanism or the working of the drying mechanism, based on whether the induction switch 17 is triggered.

[0111] The above is only the preferred specific implementation of the present application, and for the parts not disclosed in detail, such as the specific circuit connection mode or the instrument model, those skilled in the art can use the conventional technical means to realize, so it is not described here.

Claims

1. A screw air compressor with high-precision start-stop control, characterized in that, include: A filter chamber (1) is fixed with a mounting bracket (11) on one side. A filtration mechanism is installed inside the filter chamber (1). An input channel (13) is connected to one side of the filter chamber (1). A support frame (2) is installed at the bottom of the filter chamber (1). The screw air compressor chamber (3) is installed on the mounting frame (11). The filter chamber (1) is connected to the input end of the screw air compressor chamber (3) through the connecting pipe (4). The output end of the screw air compressor chamber (3) is connected to the output pipe. The screw air compressor chamber (3) is equipped with a screw air compressor mechanism. The detection module is located at the output tube and is used to detect the output status of the output tube. The control module is used to control the start and stop of the screw air compressor mechanism in the screw air compressor chamber (3); The cleaning mechanism is installed on the upper and lower sides of the filter chamber (1) and is used to clean the filter mechanism. The detection module detects the output speed of the output tube. Based on the detection information from the detection module, the control module controls the screw air compressor to stop operating when the detected value is not within the set range, and the cleaning mechanism cleans the filter mechanism. The filtration mechanism includes: The filter cartridge (5) and filter chamber (1) are provided with round openings at the top and bottom. The filter cartridge (5) slides in the round opening of the filter chamber (1) with sealing at the top and bottom. One end of the connecting pipe (4) extends into the interior of the filter cartridge (5). The length of the filter cartridge (5) is more than twice the length of the filter chamber (1). The central column (16) is mounted on the support frame (2) by a bracket, and the central column (16) is concentric with the filter cartridge (5); The sealing assembly is installed inside the filter cartridge (5). Two sealing assemblies are symmetrically arranged. The position of the sealing assembly corresponds to the position of the round opening of the filter chamber (1). One sealing assembly is installed on the outside of the central column (16), and the other sealing assembly is installed on the outside of the end of the connecting pipe (4) located inside the filter cartridge (5). The 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); The blocking assembly includes: The inner side of the annular lifting seat (30) is sealed and slides against the outer wall of the central column (16) or the connecting pipe (4); Support plate (25) is installed on the outside of the central column (16) or the outside of the connecting pipe (4); 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). The end of the slide rod (35) is fixed with a first arc block (26) or a second arc block (27). The first arc block (26) and the second arc block (27) are arc-shaped structures adapted to the inner wall of the filter cylinder (5). An arc-shaped sealing gasket (36) is provided on one side of the 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. The distance from the first arc block (26) to the filter cylinder (5) is less than the distance from the second arc block (27) to the filter cylinder (5). The actuating component is mounted on the annular lifting seat (30). Based on the movement of the annular lifting seat (30), the sliding rod (35) is actuated to push the first arc block (26) and the second arc block (27) outward. The annular baffle (28) is slidably connected to the outer wall of the annular lifting seat (30). The bottom inner side of the annular baffle (28) and the bottom of the annular lifting seat (30) are connected by an annular elastic connecting part (29). A sealing gasket (31) is provided on the top of the annular baffle (28). 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 cylinder (5), and the side of the second arc block (27) is adapted to the side shape of the first arc block (26).

2. The screw air compressor with high-precision start-stop control according to claim 1, characterized in that, The toggle assembly includes: The pulley frame (32) is installed on the annular lifting seat (30). A guide plate (33) is installed at the end of the slide rod (35) away from the filter cylinder (5). The position of the pulley frame (32) is adapted to the guide plate (33). Roller (38) is rotatably mounted on pulley frame (32). Guide plate (33) includes vertical plate and inclined plate. Inclined plate is integrally set at the bottom end of vertical plate. The bottom end of inclined plate extends towards the filter cartridge (5). The horizontal distance between the roller (38) and the upright plate is adapted to the horizontal distance between the first arc block (26) or the second arc block (27) and the filter cylinder (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).

3. A screw air compressor with high-precision start-stop control according to claim 1, characterized in that, The bottom of the first arc block (26) and the second arc block (27) is provided with arc grooves (37). When the first arc block (26) and the second arc block (27) reach the annular inner wall of the filter cylinder (5), the arc grooves (37) are assembled to form an annular structure that is compatible with the annular baffle (28).

4. A screw air compressor with high-precision start-stop control according to claim 1, characterized in that, The lifting control component includes: A lifting drive motor (10) is installed on both sides of the filter chamber (1). The lifting drive motor (10) is installed on the side bracket (14). The upper and lower ends of the filter cylinder (5) are connected to 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). The other side connecting rod (6) is fixed with a threaded column (7) on the outside. The screw barrel is rotatably mounted on a side bracket (14), and the threaded column (7) is connected to the screw barrel by threads. A driven gear (8) is installed on the outside of the screw barrel. The drive gear (9) is connected to the output end of the lifting drive motor (10) via a transmission connection. The drive gear (9) meshes with the driven gear (8).

5. A screw air compressor with high-precision start-stop control according to claim 2, characterized in that, The cleaning facility includes: An annular slide (22) is fixed at both the upper and lower ends of the filter chamber (1); Annular slide (21) is rotatably mounted on the inner wall of an annular slide (22); The annular toothed frame (23) is mounted on the annular slide (21). The inner side of the annular toothed frame (23) is provided with evenly distributed cleaning brushes (24), which are adapted to the filter cartridge (5). Rotation drive unit, which is installed on filter chamber (1), is used to drive the annular gear frame (23) to rotate.

6. A screw air compressor with high-precision start-stop control according to claim 5, characterized in that, The rotation drive unit includes: Rotation drive motor (12) is installed on filter chamber (1); The rotation control gear is connected to the output end of the rotation drive motor (12) and meshes with the ring gear frame (23).

7. A screw air compressor with high-precision start-stop control according to claim 2, characterized in that, The filter cartridge (5) is equipped with a drying mechanism, which includes: Two ring frames (19) are installed on the connecting pipe (4) and the central column (16), respectively; Heating rod (15) is mounted on ring frame (19) and is located inside the movement path of filter cartridge (5).

8. A screw air compressor with high-precision start-stop control according to claim 7, characterized in that, A connecting arm (18) is fixed to one side of the outer wall of the ring frame (19). A sensor switch (17) is provided on the connecting arm (18). The sensor switch (17) is located at the end of the movement path of the side connecting rod (6).

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