Dustproof structure of screw air compressor

Abstract

The application relates to a dustproof structure of a screw air compressor and relates to the technical field of flange machining technology, which comprises two bases, the dustproof mechanism comprises a cover plate, the bottom of the cover plate is fixedly connected with a separation pipe body, the bottom of the separation pipe body is fixedly connected with a separation funnel, the inside of the separation pipe body is fixedly connected with a threaded plate, the inside of the separation funnel is fixedly connected with a supporting plate, and the top of the supporting plate is fixedly connected with a limiting block. The application has the effect that air enters the inside of the separation pipe body through the air inlet pipe, then the air rotates around the inner walls of the separation pipe body and the separation funnel due to the air flow rate and the guidance of the threaded plate, centrifugal force is generated through rotation, dust in the air is removed, filtered air enters the inside of the compressor body through the flow guide pipe, and the damage of dust in the air to the operation of the inside of the compressor body is avoided.

Description

Technical Field

[0001] This application relates to the field of flange processing technology, and in particular to a dustproof structure for a screw air compressor. Background Technology

[0002] Screw air compressors are devices that use a helical rotor to compress air. They are characterized by high efficiency, low noise, and long lifespan, and are widely used in industry and manufacturing. When a screw air compressor operates, it draws in outside air and compresses it through the rotation of the screw, producing high-pressure air. However, during this process, the air contains dust, impurities, and other particulate matter. These particles can cause wear and tear on the internal components of the compressor, affecting the equipment's lifespan and efficiency. Therefore, the design of a dustproof structure is crucial. Dustproof mechanisms, employing technologies such as water mist spraying, dust separation, and wastewater recycling, can effectively remove particulate matter from the air, protecting the compressor from contaminants, thereby improving equipment efficiency, extending its service life, and reducing maintenance costs. A search revealed Chinese patent publication number CN222478953U, which discloses a dustproof screw air compressor, relating to the field of flange processing. The compressor body includes a compressor body with four through holes on one side of its top. An air inlet seat is fixedly installed on the top of the compressor body, and an air inlet pipe is fixedly connected to the inner wall of the air inlet seat. A lower mounting plate is fixedly installed on the top of the air inlet pipe, and a filter box is movably installed on the top of the lower mounting plate. By incorporating the connecting pipe and the filter box, the air entering the air compressor can be filtered multiple times to achieve a dustproof effect. Grooves and slides are provided to allow for the disassembly, cleaning, or replacement of the first, second, and third filter plates, improving the efficiency and quality of subsequent dustproofing. A second bolt allows for the disassembly, replacement, or repair of the connecting pipe, while a first bolt and pull plate allow for the disassembly of the filter box and air inlet pipe, facilitating subsequent maintenance or inspection of the air compressor. In existing technologies, some screw air compressors employ dust control measures including air filters, inlet dust filters, and centrifugal separators. Air filters can effectively filter large dust particles, but their filtration effect on fine dust is limited, and they require frequent filter replacements; dust filters have a simple structure but are prone to clogging, which in turn affects the air intake; centrifugal separators can effectively separate some dust, but their complex structure and high maintenance costs make them less effective. Utility Model Content

[0003] The purpose of this application is to provide a dustproof structure for a screw air compressor, aiming to improve the problems of easy clogging and high maintenance costs of the dustproof mechanisms used in some screw air compressors in the prior art.

[0004] The dustproof structure of a screw air compressor provided in this application adopts the following technical solution: A dustproof structure of a screw air compressor includes two bases, a fixed frame is fixedly connected to the top of the two bases, a compressor body is fixedly connected to the inside of the fixed frame, a guide pipe is fixedly connected to the inside of the fixed frame, a dust removal mechanism is fixedly connected to the bottom of the guide pipe, and a water resource recovery mechanism is fixedly connected to the inside of the front base. The dust removal mechanism includes a cover plate, the inside of which is fixedly connected to the outside of the guide pipe. A separation pipe body is fixedly connected to the bottom of the cover plate, and a separation funnel is fixedly connected to the bottom of the separation pipe body. The bottom of the separation funnel is fixedly connected to the top of the water resource recycling mechanism. A threaded plate is fixedly connected to the inside of the separation pipe body, and the inside of the threaded plate is fixedly connected to the outside of the guide pipe. A support plate is fixedly connected to the inside of the separation funnel, and a limiting block is fixedly connected to the top of the support plate. A spray assembly is fixedly connected to the inside of the cover plate. Through the above technical solution: the dustproof structure of the screw air compressor connects the dust removal mechanism and the water resource recovery mechanism through a fixed frame and a guide pipe. It uses a threaded plate and a spray assembly to remove dust in the separation tube and then sends it to the recovery mechanism through a separation funnel. This can efficiently separate dust from the air, recover water resources, ensure the operation of the compressor, and improve the service life and environmental friendliness of the equipment.

[0005] As a further description of the above technical solution: the water resource recycling mechanism includes a filter box, the filter box is fixedly connected to the inside of the front base, a filter mounting box is slidably connected inside the filter box, a coarse filter block is slidably connected inside the filter mounting box, a fine filter block is slidably connected inside the filter mounting box, and an activated carbon block is slidably connected inside the filter mounting box.

[0006] Through the above solution, the water resource recycling mechanism uses a filter installation box in the filter box to install coarse filter blocks, fine filter blocks and activated carbon blocks, which can sequentially perform coarse filtration, fine filtration and adsorption purification on dust removal wastewater, realize water resource recycling, reduce waste, and the filter components can be disassembled and replaced, which is convenient for maintenance, ensures the quality of recycled water, and improves the environmental protection and practicality of the compressor dust prevention system.

[0007] As a further description of the above technical solution: the spray assembly includes a water supply pipe, one end of which is fixedly connected to the inside of the cover plate, a nozzle is fixedly connected to the bottom of the same end of the water supply pipe, a water storage tank is fixedly connected to the other end of the water supply pipe, a water pump is fixedly connected to the right side of the base, the water pump divides the water supply pipe into two sections, the input end and the output end of the water pump are both connected to the outside of the water pump, an inlet is provided on the top of the water storage tank, and a drain outlet is provided on the front side of the water storage tank.

[0008] The above solution involves a spray assembly that connects a water tank and spray nozzles via a water pump and water pipes. This allows for pressurization of the water in the tank before it is sprayed through the nozzles for dust removal. The inlet facilitates water replenishment, while the outlet discharges impurities. This forms a circulating spray system, ensuring effective dust removal, facilitating maintenance and cleaning, guaranteeing continuous and efficient operation of the dust removal mechanism, and enhancing the practicality of the compressor's dustproof structure.

[0009] As a further description of the above technical solution: an air inlet pipe is fixedly connected to the left side of the separation pipe, and a valve body is fixedly connected inside the air inlet pipe, the valve body dividing the air inlet pipe into two sections.

[0010] The above solution involves equipping the air inlet pipe on the left side of the separator with a valve body to control the air intake and flow rate. This allows for easy adjustment of the air intake volume based on the compressor's operating status, ensuring stable dust removal efficiency. The valve also provides flexible control over the system, enabling the air supply to be cut off during equipment start-up, shutdown, or maintenance, thus improving operational safety and the practicality of the dustproof structure.

[0011] As a further description of the above technical solution: guide blocks are fixedly connected to both the left and right sides of the coarse filter block and the fine filter block. The guide blocks on the left and right sides of the coarse filter block are shorter than the guide blocks on the left and right sides of the fine filter block. Multiple guide grooves are provided inside the filter installation box. The guide blocks on the left and right sides of the coarse filter block and the fine filter block are slidably connected to the inside of the guide grooves.

[0012] With the above solution, the guide blocks on both sides of the coarse and fine filter blocks can slide within the guide grooves of the filter installation box, and the guide block for the coarse filter block is shorter, forming a layered positioning structure. This facilitates precise installation and quick disassembly of both, ensuring the orderly arrangement of the filter layers, while also allowing for easy replacement of filter blocks of different precision, improving maintenance convenience and the practicality of the filtration system.

[0013] As a further description of the above technical solution: the filter box has an internal receiving groove, the filter mounting box is externally slidably connected to the inside of the receiving groove, the filter box has through holes on both the upper and lower sides, the bottom of the separation funnel is connected to the upper through hole, and a return pipe is fixedly connected inside the through hole on the lower side of the filter box.

[0014] The above solution allows for the sliding installation of the filter housing within its slidable recess. Upper and lower through-holes connect to a separation funnel and a return pipe, respectively, forming a wastewater flow path. This design enables dust removal wastewater to flow into the filter housing via the separation funnel for filtration, and then be recycled through the return pipe. The structure is compact and ensures smooth flow, guaranteeing efficient water recovery, facilitating filter component installation and maintenance, and enhancing system practicality.

[0015] As a further description of the above technical solution: the support plate is an inverted funnel-shaped block, and there is a gap between the edge of the support plate and the inner wall of the separation funnel.

[0016] The above solution involves designing the support plate as an inverted funnel, with gaps between its edge and the inner wall of the separation funnel. This allows the dust-laden water to disperse and flow outwards along the surface of the support plate, increasing the contact area with the air and improving dust removal efficiency. Simultaneously, the gaps facilitate the smooth flow of water into the separation funnel, preventing blockages and ensuring a smooth dust removal process, thus enhancing the practicality of the dustproof structure.

[0017] As a further description of the above technical solution: a support block is provided on the front side of the fixed frame, and the outside of the separation funnel is fixedly connected to the inside of the support block.

[0018] The above solution allows the front support block of the front fixed frame to fix the separation funnel. The separation funnel is stably installed through structural connection, ensuring that it remains stable during the dust removal process. This avoids the normal flow and separation effect of the dust removal water due to vibration and other factors, and enhances the overall stability and reliability of the dustproof structure.

[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. In this utility model, air enters the interior of the separator tube through the air inlet pipe. Then, due to the air flow rate and the guidance of the threaded plate, the air rotates around the inner wall of the separator tube and the separator funnel. The rotation generates centrifugal force, which filters the dust in the air. The filtered air then enters the interior of the compressor body through the guide pipe, thereby preventing the dust in the air from damaging the internal operation of the compressor body. At the same time, during centrifugal filtration, the air entering the separator tube body is sprayed by the spray assembly, thereby increasing the mass of dust in the air and improving the efficiency of centrifugal filtration. 2. In this utility model, after the spraying is completed, the water containing dust enters the interior of the filter box, and then undergoes coarse filtration through the coarse filter block, followed by suction filtration through the fine filter block, and finally fine filtration through the activated carbon block inside the filter installation box. This process recovers the water containing dust, and the purified water is then guided back to the water storage tank, thereby reducing the water consumption of the spray filtration. At the same time, when it is necessary to clean the water recovery mechanism, simply pull the handle fixed to the front of the filter installation box to move the filter installation box away from the interior of the base. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of a dustproof structure for a screw air compressor proposed in this utility model; Figure 2This is a schematic diagram of the water pipe structure of a dustproof structure for a screw air compressor proposed in this utility model; Figure 3 This is a schematic diagram of the separation funnel of a dustproof structure for a screw air compressor proposed in this utility model; Figure 4 This is a schematic diagram of the filter mounting box of a dustproof structure for a screw air compressor proposed in this utility model; Explanation of reference numerals in the attached drawings: 1. Base; 2. Compressor body; 3. Fixing frame; 4. Guide pipe; 5. Dust removal mechanism; 51. Cover plate; 52. Separation pipe body; 53. Separation funnel; 54. Threaded plate; 55. Support plate; 56. Limiting block; 6. Spray assembly; 61. Water supply pipe; 62. Water pump; 63. Water storage tank; 64. Water inlet; 65. Sewage outlet; 7. Water resource recovery mechanism; 71. Filter box; 72. Coarse filter block; 73. Fine filter block; 74. Activated carbon block; 75. Filter installation box; 76. Return pipe; 8. Air inlet pipe; 9. Valve body. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1 -Appendix Figure 4 This application will be described in further detail below.

[0022] Example: A dustproof structure for a screw air compressor, referring to... Figure 1 , Figure 2 The system includes two bases 1, which serve as the load-bearing structure for the entire system, ensuring load-bearing capacity and stability. A mounting bracket 3 is fixedly connected to the top of each base 1 via bolts or welding, supporting and securing the compressor body 2 and other components. The compressor body 2 is also fixedly connected inside the mounting bracket 3. The compressor body 2 is the core component of the system, employing screw compression technology for efficient air compression. A guide pipe 4 is fixedly connected inside the mounting bracket 3, connecting the compressor body 2 to the dust removal mechanism 5. This guide pipe primarily directs the dust-removed air into the compressor body 2. The dust removal mechanism 5 is fixedly connected to the bottom of the guide pipe 4. This mechanism is one of the most critical parts of the system, its purpose being to remove dust particles from the air through centrifugal separation and water mist spraying, separating the dust from the water. A water resource recovery mechanism 7 is fixedly connected inside the front base 1, used to recover and purify the wastewater generated during the dust removal process. Specifically, air enters the dustproof structure of the screw air compressor through the intake pipe 8. In the dust removal mechanism 5, the valve body 9 controls the air intake, and the spray assembly 6 uses a water pump 62 to spray water from the water tank 63 through the water pipe 61 from the nozzle to remove dust from the air. The dust-laden wastewater flows into the separation pipe 52 through the guide pipe 4. Under the action of the threaded plate 54, the support plate 55, and the separation funnel 53, the dust and water are initially separated. The wastewater then enters the water resource recovery mechanism 7, where it is filtered and purified by the coarse filter block, the fine filter block 73, and the activated carbon block 74 before being recycled.

[0023] The dust removal mechanism 5 includes a cover plate 51, which covers the outside of the dust removal assembly and is fixed to the outside of the guide pipe 4, serving a sealing and protective function. The inside of the cover plate 51 is fixedly connected to the outside of the guide pipe 4. A separation pipe body 52 is fixedly connected to the bottom of the cover plate 51, and the separation pipe body 52 is connected to the cover plate 51 to separate air and water. A separation funnel 53 is fixedly connected to the bottom of the separation pipe body 52. ​​The separation funnel 53 is located at the bottom of the separation pipe body 52 and is designed in a funnel shape to efficiently collect falling dust and water. The water mixture ensures smooth water flow into the water resource recycling system. The bottom of the separation funnel 53 is fixedly connected to the top of the water resource recycling mechanism 7. The inside of the separation tube 52 is fixedly connected to the threaded plate 54. The inside of the threaded plate 54 is fixedly connected to the outside of the guide pipe 4. The inside of the separation funnel 53 is fixedly connected to the support plate 55. The inverted funnel shape of the support plate 55 helps to guide the water flow and disperses and guides the dust through the gaps at the edges, ensuring sufficient separation of dust and water. The top of the support plate 55 is fixedly connected to the limiting block 56. A spray assembly 6 is fixedly connected inside the cover plate 51. An air inlet pipe 8 is fixedly connected to the left side of the separation pipe 52. A valve body 9 is fixedly connected inside the air inlet pipe 8. The air inlet pipe 8 is responsible for introducing dust-laden air into the dust removal system, and the air flow is controlled by the valve body 9. The valve body 9 uses a diversion design to allow air to enter the separation pipe 52, while the design of the air inlet pipe 8 ensures smooth airflow and avoids blockage. The valve body 9 divides the air inlet pipe 8 into two sections. The support plate 55 is an inverted funnel-shaped block. There is a gap between the edge of the support plate 55 and the inner wall of the separation funnel 53. A support block is provided on the front side of the front fixing frame 3. The outside of the separation funnel 53 is fixedly connected to the inside of the support block. Specifically, dust-laden air enters the separation tube 52 through the inlet pipe 8, controlled by the valve body 9. Simultaneously, the spray assembly 6 sprays water into the separation tube 52 from the cover plate 51. The air comes into full contact with the water mist at the threaded plate 54. The dust is moistened and falls with the water flow, dispersed and guided by the inverted funnel-shaped support plate 55, and falls into the separation funnel 53 through its edge gaps. Finally, it flows into the water resource recovery mechanism 7 for treatment, and the purified air continues to the subsequent process.

[0024] The spray assembly 6 includes a water supply pipe 61, which is used to transport water from the water storage tank 63 to the nozzle. The pipe material must be corrosion resistant and have high pressure resistance. One end of the water supply pipe 61 is fixedly connected to the inside of the cover plate 51. The nozzle is fixedly connected to the bottom of the same end of the water supply pipe 61. The nozzle is responsible for evenly distributing water to the air flow area. Its spray mode is adjustable to ensure that the air and water mist are fully in contact. The other end of the water supply pipe 61 is fixedly connected to the water storage tank 63. A water pump 62 is fixedly connected to the right side of the base 1. The water pump 62 is used to draw water from the water storage tank 63, pressurize it, and then transport it to the nozzle through the water supply pipe 61. The water pump 62 divides the water supply pipe 61 into two sections. The input end and output end of the water pump 62 are both connected to the outside of the water pump 62. The top of the water storage tank 63 is provided with a water inlet 64, and the front side of the water storage tank 63 is provided with a drain outlet 65. Specifically, water pump 62 draws water from water storage tank 63, pressurizes the water, and delivers it through water pipe 61 to the nozzle at cover plate 51. The nozzle sprays water into separation pipe 52, where it comes into full contact with the dust-laden air entering through air inlet pipe 8, causing the dust to be adsorbed by the water. The sprayed water, carrying the dust, enters the subsequent processing stage of dust removal mechanism 5 through guide pipe 4, while water storage tank 63 can be replenished through water inlet 64, and the drain outlet 65 on the front side is used to discharge impurities deposited in the water tank.

[0025] Reference Figure 3 , Figure 4 The water resource recycling mechanism 7 includes a filter box 71. The guide groove design inside the filter box 71 guides the wastewater to each filtration section and ensures that each filter block can effectively complete its filtration task. The filter box 71 is externally fixedly connected to the inside of the front base 1. A filter mounting box 75 is slidably connected inside the filter box 71. A coarse filter block 72 is slidably connected inside the filter mounting box 75. The filter block 72 is used to intercept large particulate impurities and is made of metal material, which has high durability. A fine filter block 73 is slidably connected inside the filter mounting box 75. The fine filter block 73 is used to further remove fine particles and has a strong filtration effect. An activated carbon block 74 is slidably connected inside the filter mounting box 75. The activated carbon block 74 is used to adsorb residual impurities and odors in the water. Activated carbon has a large specific surface area and can effectively adsorb harmful substances in the water. Specifically, the dust-laden wastewater flowing out of the separation funnel 53 of the dust removal mechanism 5 enters the filter installation box 75 inside the filter box 71. The wastewater first passes through the coarse filter block 72 to intercept larger particulate impurities, then flows through the fine filter block 73 to further remove smaller particles, and finally passes through the activated carbon block 74 to adsorb residual impurities and odors in the water, thus completing the purification and realizing the recycling of water resources.

[0026] Guide blocks are fixedly connected to both the left and right sides of the coarse filter block 72 and the fine filter block 73. The guide blocks on the left and right sides of the coarse filter block 72 are shorter than the guide blocks on the left and right sides of the fine filter block 73. Multiple guide grooves are opened inside the filter installation box 75. The exterior of the guide blocks on the left and right sides of the coarse filter block 72 and the fine filter block 73 are slidably connected to the interior of the guide grooves. The interior of the filter box 71 is provided with a receiving groove. The exterior of the filter installation box 75 is slidably connected to the interior of the receiving groove. Through holes are opened on both the upper and lower sides of the filter box 71. The bottom of the separation funnel 53 is connected to the upper through hole. A return pipe 76 is fixedly connected inside the through hole on the lower side of the filter box 71. The return pipe 76 is used to let the purified water flow out of the filter box 71 and return it to the system for continued use. Specifically, dust-laden wastewater flows from the separation funnel 53 through the upper through-hole of the filter box 71 and enters the filter installation box 75. The coarse filter block 72 and the fine filter block 73 are positioned along the guide groove by guide blocks on both sides. The wastewater first passes through the coarse filter block 72 to initially intercept large particles of impurities, then through the fine filter block 73 to further filter small particles, and finally through the activated carbon block 74 for adsorption and purification. The treated water flows out from the lower through-hole of the filter box 71 through the return pipe 76, completing the water resource recovery and treatment process.

[0027] The implementation principle of this application embodiment is as follows: Air enters the interior of the separator tube 52 through the intake pipe 8. Then, due to the air flow rate and the guidance of the threaded plate 54, the air rotates around the inner wall of the separator tube 52 and the separator funnel 53. The rotation generates centrifugal force, which filters the dust in the air. The filtered air then enters the interior of the compressor body 2 through the guide pipe 4, thus preventing the dust in the air from damaging the internal operation of the compressor body 2. At the same time, during centrifugal filtration, the air entering the separator tube 52 is sprayed by the spray assembly 6, which increases the mass of dust in the air and thus improves the efficiency of centrifugal filtration. During the spraying process, the water pump 62 fixed on the right side of the base 1 is started, and the water flow inside the water tank 63 is guided through the water supply pipe 61 to the nozzle at the bottom of the water supply pipe 61 to spray the dust in the air, thereby improving the centrifugal filtration effect. The water inlet 64 fixed on the top of the water tank 63 serves as the water supply port inside the water tank 63, while the sewage outlet 65 fixed on the top of the water tank 63 replaces the water that has been stored inside the water tank 63 for a long time. After the spraying process ends, the dusty water flows into the filter box 71, where it undergoes coarse filtration through the coarse filter block 72, followed by fine filtration through the fine filter block 73, and finally, fine filtration through the activated carbon block 74 inside the filter mounting box 75. This process recovers the dusty water, which is then guided back to the water storage tank 63 via 66, thus reducing the water consumption of the spray filtration. Furthermore, when the water recovery mechanism 7 needs cleaning, simply pulling the handle fixed to the front of the filter mounting box 75 will move the filter mounting box 75 away from the base 1. The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dustproof structure for a screw air compressor, comprising two bases (1), characterized in that: A fixed frame (3) is fixedly connected to the top of the two bases (1), a compressor body (2) is fixedly connected to the inside of the fixed frame (3), a guide pipe (4) is fixedly connected to the inside of the fixed frame (3), a dust removal mechanism (5) is fixedly connected to the bottom of the guide pipe (4), and a water resource recycling mechanism (7) is fixedly connected to the inside of the front base (1). The dust removal mechanism (5) includes a cover plate (51), the inside of which is fixedly connected to the outside of the guide pipe (4), a separation pipe body (52) is fixedly connected to the bottom of the cover plate (51), a separation funnel (53) is fixedly connected to the bottom of the separation pipe body (52), the bottom of the separation funnel (53) is fixedly connected to the top of the water resource recycling mechanism (7), a threaded plate (54) is fixedly connected to the inside of the separation pipe body (52), the inside of the threaded plate (54) is fixedly connected to the outside of the guide pipe (4), a support plate (55) is fixedly connected to the inside of the separation funnel (53), a limiting block (56) is fixedly connected to the top of the support plate (55), and a spray assembly (6) is fixedly connected to the inside of the cover plate (51).

2. The dustproof structure of a screw air compressor according to claim 1, characterized in that: The water resource recycling mechanism (7) includes a filter box (71), which is externally fixedly connected to the interior of the front base (1). A filter mounting box (75) is slidably connected inside the filter box (71). A coarse filter block (72) is slidably connected inside the filter mounting box (75). A fine filter block (73) is slidably connected inside the filter mounting box (75). An activated carbon block (74) is slidably connected inside the filter mounting box (75).

3. The dustproof structure of a screw air compressor according to claim 1, characterized in that: The spray assembly (6) includes a water supply pipe (61), one end of which is fixedly connected to the inside of the cover plate (51). A nozzle is fixedly connected to the bottom of the same end of the water supply pipe (61). A water storage tank (63) is fixedly connected to the other end of the water supply pipe (61). A water pump (62) is fixedly connected to the right side of the base (1). The water pump (62) divides the water supply pipe (61) into two sections. The input and output ends of the water pump (62) are both connected to the outside of the water pump (62). A water inlet (64) is provided on the top of the water storage tank (63). A sewage outlet (65) is provided on the front side of the water storage tank (63).

4. The dustproof structure of a screw air compressor according to claim 1, characterized in that: An air inlet pipe (8) is fixedly connected to the left side of the separation pipe (52), and a valve body (9) is fixedly connected inside the air inlet pipe (8). The valve body (9) divides the air inlet pipe (8) into two sections.

5. The dustproof structure of a screw air compressor according to claim 2, characterized in that: Guide blocks are fixedly connected to both the left and right sides of the coarse filter block (72) and the fine filter block (73). The guide blocks on the left and right sides of the coarse filter block (72) are shorter than the guide blocks on the left and right sides of the fine filter block (73). Multiple guide grooves are provided inside the filter installation box (75). The guide blocks on the left and right sides of the coarse filter block (72) and the fine filter block (73) are slidably connected to the inside of the guide grooves.

6. The dustproof structure of a screw air compressor according to claim 2, characterized in that: The filter box (71) has an internal receiving groove. The filter mounting box (75) is externally slidably connected to the inside of the receiving groove. The filter box (71) has through holes on both the upper and lower sides. The bottom of the separation funnel (53) is connected to the upper through hole. The filter box (71) has a return pipe (76) fixedly connected inside the through hole on the lower side.

7. The dustproof structure of a screw air compressor according to claim 1, characterized in that: The support plate (55) is an inverted funnel-shaped block, and there is a gap between the edge of the support plate (55) and the inner wall of the separation funnel (53).

8. The dustproof structure of a screw air compressor according to claim 1, characterized in that: The front side of the fixed frame (3) is provided with a support block, and the outside of the separation funnel (53) is fixedly connected to the inside of the support block.

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