Air inlet device of air compressor

Abstract

The invention discloses an air inlet device of an air compressor, which relates to the technical field of air compressors, and adopts the technical scheme that the air inlet device comprises an air inlet valve body, a valve cavity, an air inlet channel, an air cavity and an air pressure channel are formed in the air inlet valve body, an air inlet valve mechanism is arranged in the air inlet valve body, and an air inlet protection mechanism is arranged at the top of the air inlet valve body; the air inlet device of the air compressor has the beneficial effects that air enters the fixed air pipe, so that the air flows into the nozzles and the fixed pipe, the air blown out of the nozzles pushes the paddles to rotate, the paddles drive the rotating pipe to rotate, the rotating pipe rotates to drive the fixed vertical pipe to rotate through the fixed transverse pipe, and the fixed vertical pipe is driven to rotate through the fixed transverse pipe; meanwhile, air flowing into the fixed pipe enters the rotary pipe, enters the fixed vertical pipe through the fixed transverse pipe and then is blown to the outside of the filter element through the air spraying holes, dust intercepted outside the filter element is automatically cleaned, and meanwhile the cleaned dust is automatically discharged through the dust discharging groove in the supporting ring.

Description

Technical Field

[0001] The invention relates to the technical field of air compressors, and in particular to an air intake device for an air compressor. Background Art

[0002] When the air compressor compresses the air, the air at the air inlet needs to be filtered to avoid affecting the inside of the air compressor.

[0003] For example, the publication number: CN211737399U discloses an air intake device for an air compressor, including an air vent, the air vent is connected to a filter, the air vent is internally connected to a support rod, and a connecting rod is passed through the middle of the support rod, one side of the support rod is connected to an electromagnet, one end of the connecting rod is connected to a sealing plate, and a spring is wound around the outer wall of the connecting rod, and the length of the filter is greater than the width of the air vent. In the present invention, the filter is connected to the air vent, and the filter can be opened to facilitate cleaning of the filter, avoid clogging of the filter, reduce the volume of gas passing through the filter per unit time, and affect the efficiency of compressed air. At the same time, the filter can only intercept larger dust and cannot filter small dust particles. A water storage tank is added to adsorb dust in the air.

[0004] In the above patent, the filter is opened to facilitate cleaning of the filter and avoid clogging of the filter. However, the filter lacks an automatic cleaning device when in use and needs to be cleaned manually on a regular basis. At the same time, when the air compressor intake valve plate is damaged, oil spraying is prone to occur, and the sprayed oil is sprayed out from the filter, which can easily cause damage to the filter and waste of oil. Summary of the invention

[0005] To this end, the present invention provides an air compressor intake device, which solves the problem of lack of automatic cleaning device when the filter is in use and lack of oil injection protection device through an intake valve mechanism and an intake protection mechanism.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: an air compressor air intake device, comprising an air intake valve body, wherein a valve cavity, an air intake passage, an air cavity, and an air pressure passage are provided inside the air intake valve body, an air intake valve mechanism is provided inside the air intake valve body, and an air intake protection mechanism is provided on the top of the air intake valve body;

[0007] The air intake protection mechanism includes an air intake pipe, the air intake pipe is fixedly arranged on the top of the air intake valve body, an inner extension ring is fixedly arranged on the top of the air intake pipe, a support ring is fixedly arranged on the outside of the air intake pipe, an air intake cover is fixedly arranged on the top of the support ring, a protection core is arranged on the top of the inner extension ring, a filter core is sleeved on the outside of the protection core, a top plate is fixedly arranged on the top of the protection core, a top cover is fixedly arranged on the top of the air intake cover, an anti-injection assembly is arranged inside the air intake pipe, and the anti-injection assembly includes a fixing frame, a hollow rod is inserted inside the fixing frame, and the bottom of the hollow rod is fixedly connected A hollow cylinder is provided, a blowout prevention valve plate is fixedly connected to the top of the hollow rod, a jet dust removal assembly is arranged inside the top cover, and the jet dust removal assembly comprises a rotating tube, a blade is fixedly sleeved on the outside of the rotating tube, a fixed horizontal tube is fixedly provided on one side of the rotating tube, a fixed vertical tube is fixedly connected to the bottom of the fixed horizontal tube, a plurality of jet holes are opened on one side of the fixed vertical tube, a fixed tube is provided on the top of the rotating tube, a rotating tube joint is arranged on the outer sleeve of the rotating tube and the fixed tube, a fixed air pipe is fixedly connected to one end of the fixed tube, and a nozzle is fixedly connected to the bottom of the fixed air pipe.

[0008] Preferably, the air pressure channel is communicated with the air cavity, and an air inlet nozzle is fixedly connected inside the air pressure channel.

[0009] Preferably, the intake valve mechanism includes a spring, the bottom of the spring is fixedly connected to the bottom of the air cavity, the top of the spring is fixedly provided with a piston plate, the piston plate is arranged inside the air cavity and is slidably connected to the air cavity, the top of the piston plate is fixedly provided with a piston rod, the top of the piston rod extends out of the air cavity and is slidably connected to the top of the air cavity, and the top of the piston rod is fixedly provided with an intake valve plate.

[0010] Preferably, a plurality of dust exhaust grooves are provided inside the support ring.

[0011] Preferably, the bottom of the filter element is sleeved on the outside of the inner extension ring and is slidably connected to the inner extension ring, and the top of the filter element is in contact with the bottom of the top plate.

[0012] Preferably, the hollow rod passes through the fixing frame and is slidably connected to the fixing frame, the fixing frame is fixed inside the air intake pipe, and the diameter of the blowout preventer valve plate is larger than the diameter of the inner ring of the inner extension ring.

[0013] Preferably, one end of the nozzle extends into the interior of the top cover and is fixedly connected to the top cover.

[0014] Preferably, the fixed tube and the rotating tube are movably connected via a rotating tube joint.

[0015] Preferably, the rotating tube passes through the top cover and is connected to the top cover via a bearing, and the bottom of the rotating tube is connected to the top of the top plate via a bearing.

[0016] The embodiments of the present invention have the following advantages:

[0017] 1. The air enters the fixed air pipe, so that the air is divided into the nozzle and the fixed pipe. The air blown out of the nozzle drives the blade to rotate, and the blade drives the rotating pipe to rotate. The rotating pipe drives the fixed vertical pipe to rotate through the fixed horizontal pipe. At the same time, the air that is divided into the fixed pipe enters the rotating pipe, enters the fixed vertical pipe through the fixed horizontal pipe, and then blows to the outside of the filter element through the air jet hole, automatically cleaning the dust intercepted on the outside of the filter element. At the same time, the cleaned dust is automatically discharged through the dust exhaust slot at the support ring;

[0018] 2. The intake valve plate is easily damaged due to frequent opening and closing as the air compressor starts. The oil inside the air compressor flows into the intake pipe through the gap between the intake valve plate and the valve cavity. When the oil contacts the hollow cylinder, the hollow cylinder moves upward due to buoyancy, and the blowout preventer valve plate fits with the bottom of the inner extension ring through the hollow rod, thereby blocking the intake pipe to prevent oil from spraying out and causing waste, and at the same time prevent oil from seeping into the filter element and causing damage to the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0021] Figure 1 A schematic diagram of the overall structure provided by the present invention;

[0022] Figure 2 A front cutaway stereogram provided by the present invention;

[0023] Figure 3 A partially cutaway stereoscopic view of the air intake protection mechanism provided by the present invention;

[0024] Figure 4 An exploded perspective view of the air intake protection mechanism provided by the present invention;

[0025] Figure 5 An exploded perspective view of the jet dust removal assembly provided by the present invention;

[0026] Figure 6 A sectional stereoscopic view of the protective core provided by the present invention;

[0027] Figure 7 An exploded perspective view of the oil spray prevention assembly provided by the present invention;

[0028] Figure 8 A sectional stereoscopic view of the intake valve mechanism provided by the present invention.

[0029] In the figure: 1 intake valve body, 2 valve cavity, 3 intake channel, 4 air cavity, 5 air pressure channel, 6 intake nozzle, 7 spring, 8 piston plate, 9 piston rod, 10 intake valve plate, 11 intake pipe, 12 inner extension ring, 13 support ring, 14 intake cover, 15 protection core, 16 top plate, 17 top cover, 18 filter element, 19 fixing frame, 20 hollow rod, 21 hollow cylinder, 22 anti-blowout valve plate, 23 fixed air pipe, 24 nozzle, 25 fixed pipe, 26 rotating pipe, 27 rotating pipe joint, 28 fixed horizontal pipe, 29 fixed vertical pipe, 30 jet hole, 31 blade. DETAILED DESCRIPTION

[0030] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See attached Figure 1 -Attached Figure 8 The present invention provides an air compressor air intake device, comprising an air intake valve body 1, wherein a valve cavity 2, an air intake passage 3, an air cavity 4, and an air pressure passage 5 are provided inside the air intake valve body 1, an air intake valve mechanism is provided inside the air intake valve body 1, and an air intake protection mechanism is provided on the top of the air intake valve body 1;

[0032] The air intake protection mechanism includes an air intake pipe 11, which is fixedly arranged on the top of the air intake valve body 1, an inner extension ring 12 is fixedly arranged on the top of the air intake pipe 11, a support ring 13 is fixedly arranged on the outside of the air intake pipe 11, an air intake cover 14 is fixedly arranged on the top of the support ring 13, a protection core 15 is arranged on the top of the inner extension ring 12, a filter core 18 is sleeved on the outside of the protection core 15, a top plate 16 is fixedly arranged on the top of the protection core 15, a top cover 17 is fixedly arranged on the top of the air intake cover 14, an anti-injection assembly is arranged inside the air intake pipe 11, and the anti-injection assembly includes a fixing frame 19, a hollow rod 20 is inserted inside the fixing frame 19, and a hollow rod 20 is fixedly connected to the bottom of the hollow rod 20 The top of the hollow rod 21 is fixedly connected with a blowout prevention valve plate 22, and the top cover 17 is provided with an air jet dust removal assembly, which includes a rotating tube 26, and a paddle 31 is fixedly sleeved on the outside of the rotating tube 26, and a fixed horizontal tube 28 is fixedly provided on one side of the rotating tube 26, and a fixed vertical tube 29 is fixedly connected to the bottom of the fixed horizontal tube 28, and a plurality of air jet holes 30 are opened on one side of the fixed vertical tube 29, and a fixed tube 25 is provided on the top of the rotating tube 26, and a rotating tube joint 27 is sleeved on the outside of the rotating tube 26 and the fixed tube 25, and one end of the fixed tube 25 is fixedly connected to a fixed air pipe 23, and a nozzle 24 is fixedly connected to the bottom of the fixed air pipe 23;

[0033] In this embodiment, in order to realize the automatic cleaning of the filter element for filtering multiple air and prevent the oil spraying when the intake valve plate 10 is damaged, when the filter element 18 needs to be cleaned, the air enters the fixed air pipe 23, so that the air is divided into the nozzle 24 and the fixed pipe 25. The air blown out of the nozzle 24 drives the paddle 31 to rotate, and the paddle 31 drives the rotating pipe 26 to rotate. The rotating pipe 26 rotates and drives the fixed vertical pipe 29 to rotate through the fixed horizontal pipe 28. At the same time, the air divided into the fixed pipe 25 enters the rotating pipe 26, enters the fixed vertical pipe 29 through the fixed horizontal pipe 28, and then blows to the filter element 18 through the jet hole 30. Externally, the dust intercepted on the outside of the filter element 18 is automatically cleaned, and the cleaned dust is automatically discharged through the dust discharge groove at the support ring 13. Since the intake valve plate 10 is often opened and closed with the start-up of the air compressor, it is easy to be damaged. The oil inside the air compressor flows into the intake pipe 11 through the gap between the intake valve plate 10 and the valve cavity 2. When the oil contacts the hollow cylinder 21, the hollow cylinder 21 moves upward due to the buoyancy, and the anti-blowout valve plate 22 is fitted with the bottom of the inner extension ring 12 through the hollow rod 20, thereby blocking the intake pipe 11 to prevent the oil from spraying out and causing waste, and at the same time prevent the oil from penetrating into the filter element 18 and causing damage to the filter element 18;

[0034] Among them, in order to achieve the purpose of unidirectional flow of the medium circulating inside the intake valve body 1, the present device adopts the following technical solutions: the air pressure channel 5 is connected to the air cavity 4, an air intake nozzle 6 is fixedly connected inside the air pressure channel 5, the intake valve mechanism includes a spring 7, the bottom of the spring 7 is fixedly connected to the bottom of the air cavity 4, a piston plate 8 is fixedly arranged on the top of the spring 7, the piston plate 8 is arranged inside the air cavity 4 and is slidably connected to the air cavity 4, a piston rod 9 is fixedly arranged on the top of the piston plate 8, the top of the piston rod 9 extends out of the air cavity 4 and is slidably connected to the top of the air cavity 4, an intake valve plate 10 is fixedly arranged on the top of the piston rod 9, and when air is inhaled, the air passes through the air intake nozzle 6 and the air pressure channel 5 through the pneumatic device to enter the air cavity 4, so that the piston plate 8 moves downward, and the movement of the piston plate 8 causes the spring 7 to contract At the same time, the piston rod 9 drives the intake valve plate 10 to move downward and break away from the top of the valve cavity 2, so that air can circulate inside the intake valve body 1. At the same time, the air compressor inhales air, so that the air is sucked into the intake pipe 11 through the intake cover 14, the filter element 18, and the protective core 15. Under normal conditions, the weight of the hollow rod 20, the hollow cylinder 21, and the blowout prevention valve plate 22 causes the blowout prevention valve plate 22 to be separated from the bottom of the inner extension ring 12, which does not affect the gas circulation during intake. The inflowing air enters the air compressor head through the valve cavity 2 and the intake channel 3. When the air compressor stops working, the pressure inside the air cavity 4 stops, and the elastic force of the spring 7 causes the piston plate 8 to move upward, thereby causing the intake valve plate 10 to block the top of the valve cavity 2, thereby achieving the purpose of one-way flow of the medium.

[0035] In order to achieve the purpose of automatically discharging clean dust, the device adopts the following technical solutions: a plurality of dust discharge grooves are opened inside the support ring 13, the bottom of the filter element 18 is sleeved outside the inner extension ring 12 and is slidably connected with the inner extension ring 12, the top of the filter element 18 is in contact with the bottom of the top plate 16, and air is blown to the outside of the filter element 18 through the air jet hole 30, and the dust intercepted outside the filter element 18 is automatically cleaned, and the cleaned dust is automatically discharged through the dust discharge groove at the support ring 13;

[0036] Among them, in order to achieve the purpose of preventing oil spraying, the present device adopts the following technical solutions: the hollow rod 20 penetrates the fixing frame 19 and is slidably connected with the fixing frame 19, the fixing frame 19 is fixedly arranged inside the air intake pipe 11, the diameter of the anti-spray valve plate 22 is larger than the inner circle diameter of the inner extension ring 12, when the oil contacts the hollow cylinder 21, the hollow cylinder 21 moves upward under the influence of buoyancy, and the anti-spray valve plate 22 is fitted with the bottom of the inner extension ring 12 through the hollow rod 20, thereby blocking the air intake pipe 11 to prevent the oil from spraying out and causing waste;

[0037] In order to achieve the purpose of controlling the rotation of the rotating tube 26 without affecting the fixed tube 25 from inletting air into the rotating tube 26, the device adopts the following technical solution: one end of the nozzle 24 extends into the top cover 17 and is fixedly connected to the top cover 17, the fixed tube 25 and the rotating tube 26 are movably connected through a rotating pipe joint 27, the rotating tube 26 passes through the top cover 17 and is connected to the top cover 17 through a bearing, the bottom of the rotating tube 26 is connected to the top of the top plate 16 through a bearing, and the air enters the fixed air pipe 23, so that the air is divided into the nozzle 24 and the fixed tube 25, the air blown out of the nozzle 24 drives the paddle 31 to rotate, the paddle 31 drives the rotating tube 26 to rotate, and the rotating tube 26 rotates along the fixed tube 25 through the rotating pipe joint 27 , through the rotating pipe joint 27 (the high-speed rotating joint is specially designed for the passage of water, hot oil, compressed air or low-pressure steam under high-speed conditions. In order to resist the wear of various hard impurities and abrasive particles entering with the medium, the main sealing components of this product are all made of imported sealing materials, and the swivel adopts a special treatment process to prevent wear and corrosion. At the same time, two imported Swedish high-precision bearings are used to support the entire copper shell, so that it can operate smoothly for a long time at a speed of 2000RPM without leakage), the rotating tube 26 is connected to the fixed tube 25 without affecting the rotation of the rotating tube 26. The rotation of the rotating tube 26 drives the fixed vertical tube 29 to rotate through the fixed horizontal tube 28, and at the same time, the air flowing into the fixed tube 25 is diverted into the rotating tube 26.

[0038] The use process of the present invention is as follows: when using the present invention, the air inlet nozzle 6 is connected to the pneumatic device, the fixed air pipe 23 is connected to the air inlet device and can also be connected to the air outlet pipe of the air compressor, so that part of the compressed air produced by the air compressor can be used for automatic cleaning of the filter element 18. When in use, it is connected to the air compressor head through the air inlet valve body 1. When air is inhaled, the air passes through the air inlet nozzle 6 and the air pressure channel 5 into the air cavity 4 through the pneumatic device, so that the piston plate 8 moves downward, and the movement of the piston plate 8 causes the spring 7 to contract. At the same time, the piston rod 9 drives the air inlet valve plate 10 to move downward and break away from the top of the valve cavity 2, so that the air It can circulate inside the intake valve body 1, and the air compressor inhales air at the same time, so that the air is sucked into the intake pipe 11 through the intake cover 14, the filter element 18, and the protective core 15. Under normal conditions, the weight of the hollow rod 20, the hollow cylinder 21, and the blowout prevention valve plate 22 makes the blowout prevention valve plate 22 separate from the bottom of the inner extension ring 12, which does not affect the gas circulation during intake. The inflowing air enters the air compressor head through the valve cavity 2 and the intake channel 3. When the filter element 18 needs to be cleaned, the air enters the fixed air pipe 23, so that the air is divided into the nozzle 24 and the fixed pipe 25. The air blown out of the nozzle 24 The paddle 31 is pushed to rotate, and the paddle 31 drives the rotating tube 26 to rotate. The rotating tube 26 rotates and drives the fixed vertical tube 29 to rotate through the fixed horizontal tube 28. At the same time, the air diverted into the fixed tube 25 enters the rotating tube 26, enters the fixed vertical tube 29 through the fixed horizontal tube 28, and then blows to the outside of the filter element 18 through the air jet hole 30, so that the dust intercepted on the outside of the filter element 18 is automatically cleaned. At the same time, the cleaned dust is automatically discharged through the dust discharge groove at the support ring 13. When the air compressor stops working, the pressure inside the air cavity 4 stops, and the elastic force of the spring 7 causes the piston plate 8 to move upward, and the air in the air cavity 4 stops. The intake valve plate 10 blocks the top of the valve cavity 2, thereby achieving the purpose of one-way flow of the medium. Since the intake valve plate 10 is frequently opened and closed as the air compressor starts, it is easy to be damaged. The oil inside the air compressor flows into the intake pipe 11 through the gap between the intake valve plate 10 and the valve cavity 2. When the oil contacts the hollow cylinder 21, the hollow cylinder 21 moves upward due to the buoyancy, and the blowout prevention valve plate 22 is fitted with the bottom of the inner extension ring 12 through the hollow rod 20, thereby blocking the intake pipe 11, preventing the oil from spraying out and causing waste, and preventing the oil from seeping into the filter element 18 and causing damage to the filter element 18.

[0039] The above are only preferred embodiments of the present invention. Any person skilled in the art may modify the present invention by using the above technical solutions or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement made according to the technical solution of the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. An air intake device for an air compressor, comprising an air intake valve body (1), characterized in that: An intake valve mechanism is provided inside the intake valve body (1), and an intake protection mechanism is provided on the top of the intake valve body (1); The air intake protection mechanism comprises an air intake pipe (11), the air intake pipe (11) is fixedly arranged on the top of the air intake valve body (1), an inner extension ring (12) is fixedly arranged on the top of the air intake pipe (11), a support ring (13) is fixedly arranged on the outside of the air intake pipe (11), an air intake cover (14) is fixedly arranged on the top of the support ring (13), a protection core (15) is arranged on the top of the inner extension ring (12), a filter core (18) is sleeved on the outside of the protection core (15), a top plate (16) is fixedly arranged on the top of the protection core (15), a top cover (17) is fixedly arranged on the top of the air intake cover (14), an air jet dust removal assembly is arranged inside the top cover (17), and an oil injection prevention assembly is arranged inside the air intake pipe (11).

2. The air intake device for an air compressor according to claim 1, characterized in that: The air intake valve body (1) is provided with a valve cavity (2), an air intake channel (3), an air cavity (4), and an air pressure channel (5). The air pressure channel (5) is connected to the air cavity (4), and an air intake nozzle (6) is fixedly connected to the air pressure channel (5).

3. The air intake device for an air compressor according to claim 1, characterized in that: The oil spray prevention assembly comprises a fixing frame (19), a hollow rod (20) is inserted into the fixing frame (19), a hollow cylinder (21) is fixedly connected to the bottom of the hollow rod (20), and a spray prevention valve plate (22) is fixedly connected to the top of the hollow rod (20).

4. The air intake device for an air compressor according to claim 1, characterized in that: The jet dust removal assembly comprises a rotating tube (26), the rotating tube (26) is fixedly sleeved with a blade (31) on the outside, a fixed transverse tube (28) is fixedly arranged on one side of the rotating tube (26), a fixed vertical tube (29) is fixedly connected to the bottom of the fixed transverse tube (28), a plurality of jet holes (30) are opened on one side of the fixed vertical tube (29), a fixed tube (25) is arranged on the top of the rotating tube (26), a rotating tube joint (27) is sleeved on the outside of the rotating tube (26) and the fixed tube (25), one end of the fixed tube (25) is fixedly connected to a fixed air pipe (23), and a nozzle (24) is fixedly connected to the bottom of the fixed air pipe (23).

5. The air intake device for an air compressor according to claim 1, characterized in that: The intake valve mechanism comprises a spring (7), the bottom of the spring (7) is fixedly connected to the bottom of the air cavity (4), the top of the spring (7) is fixedly provided with a piston plate (8), the piston plate (8) is arranged inside the air cavity (4) and is slidably connected to the air cavity (4), the top of the piston plate (8) is fixedly provided with a piston rod (9), the top of the piston rod (9) extends out of the air cavity (4) and is slidably connected to the top of the air cavity (4), and the top of the piston rod (9) is fixedly provided with an intake valve plate (10).

6. The air intake device for an air compressor according to claim 1, characterized in that: A plurality of dust removal grooves are provided inside the support ring (13).

7. The air intake device for an air compressor according to claim 1, characterized in that: The bottom of the filter element (18) is sleeved on the outside of the inner extension ring (12) and is slidably connected to the inner extension ring (12), and the top of the filter element (18) is in contact with the bottom of the top plate (16).

8. The air intake device for an air compressor according to claim 3, characterized in that: The hollow rod (20) penetrates the fixing frame (19) and is slidably connected to the fixing frame (19); the fixing frame (19) is fixed inside the air intake pipe (11); and the diameter of the anti-blowout valve plate (22) is larger than the inner diameter of the inner ring (12).

9. The air intake device for an air compressor according to claim 4, characterized in that: One end of the nozzle (24) extends into the interior of the top cover (17) and is fixedly connected to the top cover (17).

10. The air intake device for an air compressor according to claim 4, characterized in that: The fixed tube (25) and the rotating tube (26) are movably connected via a rotating tube joint (27); the rotating tube (26) passes through the top cover (17) and is connected to the top cover (17) via a bearing; and the bottom of the rotating tube (26) is connected to the top of the top plate (16) via a bearing.

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