Screw type air compressor

Abstract

The utility model relates to the technical field of air compressors, in particular to a screw type air compressor which comprises a shell, a supporting column is fixedly connected to the lower portion of the shell, an air compression mechanism is fixedly connected to the left side of the shell, an air inlet pipe is fixedly connected to the top of the shell, and a sealing cylinder is connected to the upper portion of the outer side of the air inlet pipe in a threaded mode. The air inlet pipe is arranged, so that the filtering device can be easily disassembled and assembled, the filtering device is placed between the top sleeve and the pipe body, the filtering device can be fixed between the pipe body and the top sleeve under the action of the jacking spring, and the limiting block can be clamped into the clamping groove through continuous rotation; the filtering device can be rotated by pressing the filtering device downwards to enable a limiting block to be separated from a clamping groove, a connecting block is aligned with a block groove through rotation, the filtering device can move upwards to be taken out, and disassembly and assembly are convenient.

Description

Technical Field

[0001] This utility model relates to the field of air compressor technology, and in particular to a screw air compressor. Background Technology

[0002] An air compressor is a device used to compress gas and is widely used in machinery, electronics and other fields. A screw compressor is a rotary positive displacement compressor in which two rotors with helical gears mesh with each other, so that the volume at the meshing point of the two rotors decreases, thereby compressing the gas and discharging it.

[0003] To ensure cleaner air entering the compressor, existing screw air compressors typically have a filter installed at the intake pipe. The filter is usually fixed with bolts, which is inconvenient to install and difficult to disassemble. When the filter needs to be cleaned after a period of use, it cannot be quickly disassembled and replaced. Utility Model Content

[0004] In view of this, the present invention provides a screw air compressor, the main technical problem to be solved is: the filter device at the air compressor intake pipe cannot be replaced quickly because it is fixed with bolts.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a screw air compressor, comprising a housing, a support column fixedly connected to the lower part of the housing, an air compressor mechanism fixedly connected to the left side of the housing, an air inlet pipe fixedly connected to the top of the housing, a closed cylinder threadedly connected to the upper outer side of the air inlet pipe, the air inlet pipe comprising a tube body fixedly connected to the top of the housing, a fixed cylinder fixedly connected to the lower part of the tube body, a top column movably connected inside the fixed cylinder, a tensioning spring fixedly connected between the fixed cylinder and the top column, a top sleeve fixedly connected to the top of the top column, a filter device placed between the tube body and the top sleeve, a block groove provided at the upper part of the tube body, and a retaining groove provided at the upper side of the tube body.

[0006] By adopting the above technical solution, during installation, the filter device is placed on top of the air inlet pipe, and the connecting block is aligned with the slot, allowing the filter device to be inserted into the pipe body. By continuously inserting it, the filter device comes into contact with the top sleeve, and by squeezing, the top sleeve moves downward, allowing the filter device to continue moving downward. By moving downward, the connecting block passes through the slot, allowing the filter device to rotate. After rotating to a certain angle, the filter device is released, and under the action of the tightening spring, the top sleeve can hold the filter device in place, thus fixing the filter device between the pipe body and the top sleeve.

[0007] As a further description of the above technical solution: the shell comprises a shell body, and a gas outlet pipe is fixedly connected to the left side of the lower part of the shell body.

[0008] By adopting the above technical solution, the gas outlet pipe is used for discharging compressed air.

[0009] As a further description of the above technical solution: the support column comprises a column body fixedly connected to the lower part of the shell body, a base is threadedly connected to the outer side of the column body, a rotating column is movably connected to the lower part of the inner side of the column body, a fixed shaft is fixedly connected to the inner side of the rotating column, and a roller is movably connected to the outer side of the fixed shaft.

[0010] By adopting the above technical solution, the base can rotate in the column body by being screwed, and the base can move up and down on the outer side of the column body by being forward rotated and reversely rotated, the roller can contact the ground by being moved upward, so that the air compressor can be conveniently moved, and the air compressor can be stably placed by being moved downward, so that the roller is away from the ground.

[0011] As a further description of the above technical solution: the air compressor mechanism comprises a motor fixedly connected to the left side of the shell body, an output shaft of the motor is fixedly connected with a driving gear, a first compression roller is fixedly connected to the outer side of the driving shaft, a driven gear is engaged with the outer side of the driving gear, a second compression roller is engaged with the outer side of the first compression roller, and a driven shaft is fixedly connected to the inner sides of the driven gear and the second compression roller.

[0012] By adopting the above technical solution, the driving shaft, the driving gear and the first compression roller can be rotated by starting the motor, and the driven gear, the second compression roller and the driven shaft can be rotated, the first compression roller and the second compression roller are continuously rotated by being engaged, the volume of the engagement part of the first compression roller and the second compression roller is changed from large to small, and the gas can be compressed and discharged.

[0013] As a further description of the above technical solution: the closed cylinder comprises a cylinder body threadedly connected to the upper part of the outer side of the pipe body, the lower part of the cylinder body is provided with an air inlet hole, a fixed column is fixedly connected to the inner side of the cylinder body, a closing block is movably connected to the outer side of the fixed column, and a return spring is fixedly connected between the cylinder body and the closing block.

[0014] Through the above technical scheme, the closing block can be tightly attached to the cylinder under the action of the return spring, so that the top of the cylinder is closed, ensuring that dust in the external air cannot enter the filter device in the air inlet pipe, ensuring that dust does not adhere to the filter device when the air compressor is not in use, ensuring the service life of the filter device, and enabling the inside of the shell to generate negative pressure instantaneously when the air compressor is started, enabling the closing block to move downward under the action of air pressure, so that a gap is formed between the closing block and the cylinder, enabling air to enter the air inlet pipe and the shell through the air inlet hole, and ensuring that the air compressor can smoothly compress air.

[0015] As a further description of the above technical scheme: the filter device comprises a connecting block placed between the pipe body and the top cover, a limiting block movably connected in the connecting block, an extrusion spring fixedly connected between the connecting block and the limiting block, a fixed sleeve fixedly connected to the inner side of the connecting block, and a filter core fixedly connected to the inner side of the fixed sleeve.

[0016] Through the above technical scheme, when the filter device is placed between the top cover and the pipe body, the limiting block can be aligned with the clamping groove by rotating the filter device, the limiting block can be clamped into the clamping groove under the action of the extrusion spring, so that the filter device cannot be rotated, ensuring that it is fixed more firmly, and after the fixing is completed, the closing cylinder can be screwed onto the pipe body for use. When disassembling, first unscrew the closing cylinder, then press the filter device downward to make the limiting block leave the clamping groove, and then rotate the filter device, align the connecting block with the block slot, and move the filter device upward to take it out, and under the action of the tightening spring, the filter device can be taken out more easily, facilitating cleaning and disassembly.

[0017] Through the above technical scheme, the screw type air compressor has at least the following advantages:

[0018] Compared with existing technologies, this screw air compressor, by having an intake pipe, facilitates easy assembly and disassembly of the filter device. By placing the filter device at the top of the intake pipe and aligning the connecting block with the slot, the filter device can be inserted into the pipe. Continuous insertion allows the filter device to contact the top sleeve, and compression causes the top sleeve to move downwards, further allowing the filter device to move downwards. This downward movement allows the connecting block to pass through the slot, enabling the filter device to rotate. After rotating a certain angle, releasing the filter device allows the top sleeve to hold the filter device in place under the action of the clamping spring, thus allowing the filter device to be disassembled and assembled. Fixed between the tube body and the top sleeve, the limiting block is aligned with the slot by continuous rotation. Under the action of the compression spring, the limiting block can be locked into the slot, thus preventing the filter device from rotating and ensuring it is more securely fixed. After fixing, the sealing cylinder can be screwed onto the tube body for use. To disassemble, first unscrew the sealing cylinder, then press the filter device down to make the limiting block leave the slot, allowing the filter device to rotate. By rotating, the connecting block is aligned with the slot, allowing the filter device to move upward and be removed. Under the action of the tightening spring, the filter device can be removed more easily for cleaning, making disassembly and assembly quite convenient. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a screw air compressor proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the overall support structure of a screw air compressor proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of the overall structure of the air compressor mechanism of a screw air compressor proposed in this utility model;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the closed cylinder and air inlet pipe of a screw air compressor proposed in this utility model.

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the air inlet pipe of a screw air compressor proposed in this utility model.

[0024] Figure 6 This is a cross-sectional structural diagram of a filter device for a screw air compressor proposed in this utility model.

[0025] Legend: 1. Outer shell; 101. Shell; 102. Air outlet pipe; 2. Support column; 201. Column; 202. Base; 203. Rotating column; 204. Roller; 205. Fixed shaft; 3. Air compressor mechanism; 301. Motor; 302. Drive gear; 303. First pressure roller; 304. Drive shaft; 305. Driven shaft; 306. Second pressure roller; 307. Driven gear; 4. Enclosed cylinder; 401. Cylinder body; 402. Sealing block; 403. Fixing column; 404. Return spring; 405. Air inlet; 5. Air inlet pipe; 501. Pipe body; 502. Fixing cylinder; 503. Top column; 504. Top sleeve; 505. Tightening spring; 506. Filter device; 5061. Fixing sleeve; 5062. Filter element; 5063. Connecting block; 5064. Compression spring; 5065. Limiting block; 507. Block groove; 508. Slot. Detailed Implementation

[0026] Reference Figures 1-6 This utility model provides a screw air compressor: It includes a housing 1, a support column 2 fixedly connected to the lower part of the housing 1, an air compressor mechanism 3 fixedly connected to the left side of the housing 1, an air inlet pipe 5 fixedly connected to the top of the housing 1, and a sealed cylinder 4 threadedly connected to the upper outer side of the air inlet pipe 5. The air inlet pipe 5 includes a pipe body 501 fixedly connected to the top of the housing 1, a fixed cylinder 502 fixedly connected to the lower part of the inside of the pipe body 501, a top column 503 movably connected inside the fixed cylinder 502, the top column 503 rising and falling within the fixed cylinder 502, a tensioning spring 505 fixedly connected between the fixed cylinder 502 and the top column 503, a top sleeve 504 fixedly connected to the top of the top column 503, a filter device 506 placed between the pipe body 501 and the top sleeve 504, and a block groove 507 provided above the inside of the pipe body 501 for the passage of a connecting block 5063 on the filter device 506. However, a slot 508 is provided on the upper inner side of the tube body 501. The slot 508 is used for the insertion of the limiting block 5065. During installation, the filter device 506 is placed on top of the air intake pipe 5, and the connecting block 5063 is aligned with the slot 507, so that the filter device 506 can be inserted into the tube body 501. By continuously inserting it, the filter device 506 can contact the top sleeve 504, and by squeezing, the top sleeve 504 can move downward, thereby allowing the filter device 506 to continue to move downward. By moving downward, the connecting block 5063 can pass through the slot 507, allowing the filter device 506 to rotate. After it rotates to a certain angle, the filter device 506 is released. Under the action of the tightening spring 505, the top sleeve 504 can hold the filter device 506, so that the filter device 506 can be fixed between the tube body 501 and the top sleeve 504.

[0027] Furthermore, the outer casing 1 includes a housing 101, and an air outlet pipe 102 is fixedly connected to the lower left side of the housing 101. The air outlet pipe 102 is used to discharge compressed air.

[0028] Furthermore, the support column 2 includes a column 201 fixedly connected to the lower part of the housing 101. A base 202 is threadedly connected to the outer side of the column 201. By twisting the base 202, it can rotate inside the column 201. By rotating forward and backward, the base 202 can move up and down outside the column 201. By moving upward, the roller 204 can contact the ground, facilitating the movement of the air compressor. By moving downward, the roller 204 can leave the ground, allowing the air compressor to be placed stably. A rotating column 203 is movably connected to the lower part inside the column 201. A fixed shaft 205 is fixedly connected to the inner side of the rotating column 203. A roller 204 is movably connected to the outer side of the fixed shaft 205. The rotating column 203 can rotate inside the column 201, and the roller 204 can rotate outside the fixed shaft 205, allowing the air compressor to be moved.

[0029] Furthermore, the air compressor mechanism 3 includes a motor 301 fixedly connected to the left side of the housing 101. A drive shaft 304 is fixedly connected to the output end of the motor 301. The drive shaft 304 can rotate inside the housing 101. A drive gear 302 is fixedly connected to the outer side of the drive shaft 304 near the motor 301. A first pressure roller 303 is fixedly connected to the outer side of the drive shaft 304. A driven gear 307 meshes with the outer side of the drive gear 302. A second pressure roller 306 meshes with the outer side of the first pressure roller 303. The driven gear 307 and the second pressure roller 306... A driven shaft 305 is fixedly connected inside the roller 306. The driven shaft 305 can rotate inside the housing 101. By starting the motor 301, the drive shaft 304 can drive the drive gear 302 and the first pressure roller 303 to rotate, which in turn drives the driven gear 307, the second pressure roller 306 and the driven shaft 305 to rotate. As the meshing first pressure roller 303 and second pressure roller 306 rotate continuously, the volume at the meshing point of the first pressure roller 303 and the second pressure roller 306 changes from large to small, thereby compressing and discharging the gas.

[0030] Furthermore, the sealed cylinder 4 includes a cylinder 401 threadedly connected to the upper outer side of the tube 501. An air inlet 405 is provided at the lower part of the cylinder 401 for air passage. A fixing post 403 is fixedly connected inside the cylinder 401, and a sealing block 402 is movably connected to the outer side of the fixing post 403. The sealing block 402 can rise and fall outside the fixing post 403. A return spring 404 is fixedly connected between the cylinder 401 and the sealing block 402. Under the action of the return spring 404, the sealing block 402 can tightly fit against the cylinder 401, thereby sealing the top of the cylinder 401. The sealed cylinder 4 prevents dust from entering the filter 506 in the air intake pipe 5 through the sealed cylinder 4, ensuring that dust does not adhere to the filter 506 when the air compressor is not in use, thus extending the service life of the filter 506. When in use, the air compressor mechanism 3 is activated, instantly creating a negative pressure inside the outer casing 1. Under the action of air pressure, the sealing block 402 can move downward, thereby creating a gap between the sealing block 402 and the cylinder 401, allowing air to enter the air intake pipe 5 through the air intake hole 405 and then into the outer casing 1, ensuring that the air compressor mechanism 3 can compress the air smoothly.

[0031] Furthermore, the filter device 506 includes a connecting block 5063 placed between the tube body 501 and the top sleeve 504. A limiting block 5065 is movably connected inside the connecting block 5063, allowing the limiting block 5065 to move up and down within the connecting block 5063. A compression spring 5064 is fixedly connected between the connecting block 5063 and the limiting block 5065. A fixing sleeve 5061 is fixedly connected to the inner side of the connecting block 5063, and a filter element 5062 is fixedly connected to the inner side of the fixing sleeve 5061. The filter element 5062 is used to filter air. When the filter device 506 is placed between the top sleeve 504 and the tube body 501, rotating the filter device 506 allows the limiting block 5065 to align with the slot 508. Under the action of the compression spring 5064, the limiting block 5065 can be inserted into the slot 508, thereby preventing the filter device 506 from rotating and ensuring that it is more firmly fixed. After fixing, the sealing cylinder 4 can be screwed onto the tube body 501 for use. When disassembling, first unscrew the sealing cylinder 4, then press down on the filter device 506 so that the limiting block 5065 leaves the slot 508, and the filter device 506 can be rotated. By rotating, the connecting block 5063 is aligned with the slot 507, so that the filter device 506 can be moved upward and removed. Under the action of the tightening spring 505, the filter device 506 can be removed more easily, making it convenient for cleaning and disassembly and assembly.

[0032] Working principle: In use, the filter device 506 is placed on top of the air intake pipe 5, and the connecting block 5063 is aligned with the slot 507, allowing the filter device 506 to be inserted into the pipe body 501. Through repeated insertion, the filter device 506 contacts the top sleeve 504, and the top sleeve 504 moves downwards due to compression, allowing the filter device 506 to continue moving downwards. This downward movement allows the connecting block 5063 to pass through the slot 507, enabling the filter device 506 to rotate. After rotating a certain angle, the filter device 506 is released. Under the action of the tightening spring 505, the top sleeve 504 presses against the filter device 506, fixing the filter device 506 between the pipe body 501 and the top sleeve 504. The continuous rotation allows the limiting block 5065 to align with the slot 508. Under the action of the compression spring 5064, the limiting block 5065 can be locked into the slot 508, thus preventing the filter device 506 from rotating and ensuring it is more securely fixed. After fixing, the sealing cylinder 4 can be screwed onto the tube body 501 for use. To disassemble, first unscrew the sealing cylinder 4, then press down on the filter device 506 to make the limiting block 5065 leave the slot 508, allowing the filter device 506 to rotate. By rotating, the connecting block 5063 aligns with the block groove 507, allowing the filter device 506 to move upward and be removed. Under the action of the tightening spring 505, the filter device 506 can be removed more easily for cleaning, making disassembly and assembly convenient.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A screw air compressor, comprising a housing (1), characterized in that: A support column (2) is fixedly connected to the lower part of the outer shell (1), an air compressor (3) is fixedly connected to the left side of the outer shell (1), an air inlet pipe (5) is fixedly connected to the top of the outer shell (1), a closed cylinder (4) is threadedly connected to the upper side of the outer side of the air inlet pipe (5), the air inlet pipe (5) includes a pipe body (501) fixedly connected to the top of the outer shell (1), a fixed cylinder (502) is fixedly connected to the lower part of the inner side of the pipe body (501), a top column (503) is movably connected inside the fixed cylinder (502), a top spring (505) is fixedly connected between the fixed cylinder (502) and the top column (503), a top sleeve (504) is fixedly connected to the top of the top column (503), a filter device (506) is placed between the pipe body (501) and the top sleeve (504), a block groove (507) is provided on the upper part of the inner side of the pipe body (501), and a slot (508) is provided on the upper part of the inner side of the pipe body (501).

2. The screw air compressor according to claim 1, characterized in that: The outer shell (1) includes a shell (101), and an air outlet pipe (102) is fixedly connected to the lower left side of the shell (101).

3. A screw air compressor according to claim 1, characterized in that: The support column (2) includes a column (201) fixedly connected to the lower part of the housing (101), a base (202) threadedly connected to the outer side of the column (201), a rotating column (203) movably connected to the lower part of the inside of the column (201), a fixed shaft (205) fixedly connected to the inner side of the rotating column (203), and a roller (204) movably connected to the outer side of the fixed shaft (205).

4. A screw air compressor according to claim 1, characterized in that: The air compressor mechanism (3) includes a motor (301) fixedly connected to the left side of the housing (101). The output end of the motor (301) is fixedly connected to a drive shaft (304). A drive gear (302) is fixedly connected to the outside of the drive shaft (304) near the motor (301). A first pressure roller (303) is fixedly connected to the outside of the drive shaft (304). A driven gear (307) meshes with the outside of the drive gear (302). A second pressure roller (306) meshes with the outside of the first pressure roller (303). A driven shaft (305) is fixedly connected inside the driven gear (307) and the second pressure roller (306).

5. A screw air compressor according to claim 1, characterized in that: The closed cylinder (4) includes a cylinder (401) threadedly connected to the upper part of the outer side of the tube (501). The lower part of the cylinder (401) is provided with an air inlet (405). A fixed column (403) is fixedly connected inside the cylinder (401). A sealing block (402) is movably connected to the outer side of the fixed column (403). A return spring (404) is fixedly connected between the cylinder (401) and the sealing block (402).

6. A screw air compressor according to claim 1, characterized in that: The filter device (506) includes a connecting block (5063) placed between the tube body (501) and the top sleeve (504). A limiting block (5065) is movably connected inside the connecting block (5063). A compression spring (5064) is fixedly connected between the connecting block (5063) and the limiting block (5065). A fixing sleeve (5061) is fixedly connected to the inner side of the connecting block (5063). A filter element (5062) is fixedly connected to the inner side of the fixing sleeve (5061).

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