Explosion-proof oil-free air compressor

Abstract

The application relates to the technical field of air compressors, in particular to an explosion-proof oil-free air compressor. The application comprises a support, an oil-free air compressor body installed on the support, a buffer structure arranged above the oil-free air compressor body, and an explosion-proof layer arranged between the buffer structure and the oil-free air compressor body. The buffer structure comprises a wire box, a box cover is installed on the wire box, a plurality of pressure relief grooves are arranged in an annular array on the box cover, a bottom disc is arranged on the inner side of the wire box, a buffer bin is rotatably arranged on the bottom disc, and wire holes are arranged on the side of the buffer bin. The application realizes explosion blocking at the power supply wiring position, bidirectional explosion-proof of bearings, heat dissipation and gas internal circulation pressure relief in the air compressor, and can safely provide power for drilling pneumatic tools.

Description

Technical Field

[0001] This invention relates to the field of air compressor technology, specifically an explosion-proof oil-free air compressor. Background Technology

[0002] As a key power equipment, the compressed air generated by the air compressor can drive the pneumatic tools (such as pneumatic drills and pneumatic wrenches) on the drilling platform. However, in places where oil and gas are extracted, processed and used, there are a large number of flammable and explosive gases (such as methane and ethylene) in the equipment operating environment. This requires the air compressor to have a certain explosion-proof performance to prevent the equipment from overheating and causing fire or explosion, or to withstand the internal explosion pressure and prevent the external explosive from spreading when the gas is ignited inside the air compressor.

[0003] Currently, air compressors on the market are mainly divided into oil-lubricated air compressors and oil-free air compressors. Oil-lubricated air compressors do not have explosion-proof performance because they contain flammable substances. Most oil-free air compressors also do not have explosion-proof function, as they are not protected or isolated at the source of potential sparks and do not meet the requirements for explosion-proof performance. Therefore, an explosion-proof oil-free air compressor is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide an explosion-proof oil-free air compressor to solve the problems mentioned in the background art.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An explosion-proof oil-free air compressor includes a support and an oil-free air compressor body mounted on the support. A buffer structure is provided above the oil-free air compressor body, and an explosion-proof layer is provided between the buffer structure and the oil-free air compressor body.

[0007] The buffer structure includes a junction box, a cover is installed on the junction box, and a plurality of pressure relief grooves are arranged in a circular array on the cover.

[0008] The buffer structure also includes a chassis disposed inside the wire box, a buffer chamber rotatably disposed on the chassis, and wire holes are opened on the side wall of the buffer chamber;

[0009] The top of the buffer chamber is slidably provided with a chamber cover, and the top of the chamber cover is provided with a riser frame. The riser frame is provided with multiple connecting rods located directly below the pressure relief grooves. Each connecting rod is provided with a cylindrical plug located inside the corresponding pressure relief groove. The top of the cylindrical plug is provided with a sealing plug that matches the pressure relief groove and is located directly above the corresponding pressure relief groove. Several arc-shaped grooves are arranged in a ring array on the side wall of each cylindrical plug.

[0010] Preferably, a locking assembly is installed between the buffer compartment and the chassis. The locking assembly includes an iron block and two strong magnets.

[0011] The iron block is fixedly installed on the side wall of the buffer chamber;

[0012] Two powerful magnets are symmetrically arranged on both sides of the chassis, and each of the powerful magnets is connected to the side wall of the chassis by a mounting bracket.

[0013] Preferably, the chassis is provided with a plurality of vertically connected conduits, all located inside the buffer compartment, and the conduits are connected to the explosion-proof layer. Each conduit is equipped with a compression assembly at its top.

[0014] Each of the extrusion assemblies comprises an internally threaded sleeve and a compression sleeve, wherein...

[0015] The internally threaded sleeve is installed on the top surface of the chassis, between the conduit and the buffer chamber;

[0016] The compression sleeve is a hollow frustum-shaped structure, and the lower end of the compression sleeve is provided with an annular external thread tube that is compatible with the internal thread sleeve.

[0017] Preferably, a guide spring assembly is installed between the buffer chamber and the chamber cover.

[0018] The guide rebound assembly includes several external slots opened on the side wall of the buffer chamber and arranged in a staggered manner with the wire holes, and each external slot is provided with a sliding shaft inside;

[0019] The guide rebound assembly also includes connecting blocks located at the lower end of the compartment cover and having the same number as the sliding shafts. Each connecting block has a sliding groove sleeved on the outside of the sliding shaft, and each sliding shaft has a spring sleeved on its outside. One end of the spring is connected to the connecting block, and the other end of the spring is connected to the buffer compartment.

[0020] Preferably, the oil-free air compressor body is further provided with a motor assembly, an eccentric wheel, and a crankcase assembly. The eccentric wheel is located between the motor assembly and the crankcase assembly, and the motor assembly, eccentric wheel, and crankcase assembly are sequentially connected in a transmission manner.

[0021] The motor assembly includes a round bearing and an output shaft. The output shaft is installed inside the round bearing, and an adapter block is also sleeved on the outside of the output shaft. The adapter block is sealed to the motor assembly and is located on the side of the round bearing.

[0022] Preferably, a set of heat dissipation structures is installed at each end of the oil-free air compressor body.

[0023] Each heat dissipation structure includes a cooling fan and a dust cover, with the dust cover installed on the outside of the cooling fan;

[0024] The heat dissipation structure also includes a heat dissipation channel and an outlet, which are connected through each other, and the heat dissipation channel is installed on the outside of the crankcase assembly and the motor assembly.

[0025] Preferably, the input end of the cooling fan is connected to the output shaft via a coupling.

[0026] Preferably, the oil-free air compressor body is further equipped with a gas recirculation structure, which includes an exhaust channel and two intake channels. The crankcase assembly, the intake channel, and the exhaust channel are connected in a continuous manner, and the two intake channels are connected by an intake connector. One of the intake channels is provided with an intake port, and the exhaust channel is provided with an exhaust port. A solenoid valve is provided near the exhaust port of the exhaust channel. A recirculation channel is also connected in a continuous manner to the solenoid valve. The end of the recirculation channel away from the solenoid valve is connected in a continuous manner to the intake channel.

[0027] Preferably, the eccentric wheel is mounted on the body of the oilless air compressor via a connecting bearing, and a bearing steel ring is provided on the outer side of the body of the oilless air compressor, and oil seals are provided on both sides of the connecting bearing.

[0028] Preferably, the sealing plug is frustum-shaped, and the radius of the upper base of the sealing plug is greater than the radius of the lower base.

[0029] The beneficial effects of this invention are:

[0030] 1. In this invention, by setting an explosion-proof layer above the main body of the oil-free air compressor, the residual waves of sparks at the power cord connection or external flammable gas explosions can be blocked, preventing them from impacting the main body of the oil-free air compressor and causing a propagation explosion. Moreover, a buffer structure is set above the explosion-proof layer, specifically a rotatable buffer chamber and a sliding chamber cover are set inside the junction box. When the shock wave enters the junction box, it will push the chamber cover and move the connecting rod upward, causing the cylindrical plug to disengage from the pressure relief groove, allowing some of the air pressure to be discharged directionally from the pressure relief groove. The remaining pressure is then absorbed by the explosion-proof layer, greatly reducing the instantaneous impact on the explosion-proof layer and preventing it from rupturing due to overpressure. In addition, the buffer chamber can be rotated, allowing the wire hole to be adjusted to the opposite side of the power cord inlet and outlet, so that the shock wave can circulate inside the junction box before entering the buffer chamber, extending the buffer path and further weakening the impact force. Furthermore, a rubber tubing and a frustum-shaped compression sleeve are configured. Rotating the compression sleeve can squeeze the tubing, adjusting the gap between the tubing and power cords of different radii, preventing the shock wave from completely entering the explosion-proof layer through the gap.

[0031] 2. In this invention, a sealing adapter block is fitted on the outside of the motor output shaft, which can not only isolate the explosion from the outside or the crankcase explosion to the inside of the motor, but also prevent the explosion inside the motor from spreading outward.

[0032] 3. In this invention, the oil-free air compressor body is equipped with heat dissipation structures at both ends. Heat is carried away from the inside of the oil-free air compressor through heat dissipation channels, reducing the equipment temperature and preventing overheating and explosion. In addition, the cooling fans share the power of a single motor assembly, reducing failure points and wiring.

[0033] 4. In this invention, by setting up a return channel, the gas can be recirculated and depressurized when the exhaust port stops, thereby controlling pressure fluctuations and preventing overpressure explosions.

[0034] 5. The eccentric wheel connecting bearing of the oil-free air compressor is equipped with oil seals and bearing steel rings on both sides to isolate the bearing from the combustible gas and reduce the risk of friction spark explosion. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0037] Figure 2 This is a schematic diagram of the installation of the adapter block of the present invention;

[0038] Figure 3 This is a schematic diagram of the heat dissipation structure of the present invention;

[0039] Figure 4 This is a schematic diagram of the installation of the oil seal of the present invention;

[0040] Figure 5 This is a schematic diagram of the installation of the bearing steel ring of the present invention;

[0041] Figure 6 This is a schematic diagram of the gas reflux structure of the present invention;

[0042] Figure 7 This is another schematic diagram of the gas reflux structure of the present invention;

[0043] Figure 8 This is a schematic diagram of the explosion-proof layer of the present invention;

[0044] Figure 9 This is an exploded view of the buffer structure of the present invention;

[0045] Figure 10 This is a partial exploded view of the buffer structure of the present invention;

[0046] Figure 11This is an exploded view of the extrusion assembly of the present invention;

[0047] Figure 12 yes Figure 9 Enlarged view of point A in the middle;

[0048] Figure 13 yes Figure 10 Enlarged diagram of point B in the middle.

[0049] The reference numerals in the diagram are as follows: 100, support; 200, main body of the oil-free air compressor; 201, motor assembly; 2011, output shaft; 202, round bearing; 204, adapter block; 206, eccentric wheel; 207, crankcase assembly; 208, bearing steel ring; 209, oil seal; 300, explosion-proof layer; 400, buffer structure; 401, junction box; 402, power cord inlet / outlet; 403, buffer chamber; 404, chamber cover; 405, extension frame; 406, connecting rod; 407, cylindrical plug; 4071, arc groove; 408, sealing plug; 409, box cover; 410, pressure relief groove; 411, chassis; 412, mounting bracket; 413. 414. Powerful magnet; 415. Conduit; 416. Iron block; 417. Internally threaded sleeve; 418. Annular externally threaded pipe; 419. Compression sleeve; 420. Paddle; 421. Connecting block; 422. Slide groove; 423. External groove; 424. Sliding shaft; 425. Spring; 500. Wire hole; 501. Heat dissipation structure; 502. Cooling fan; 503. Dust cover; 504. Coupling; 505. Heat dissipation channel; 506. Outlet; 607. Gas recirculation structure; 601. Air inlet; 602. Recirculation channel; 603. Exhaust port; 604. Exhaust channel; 605. Solenoid valve; 606. Air inlet connector; 607. Air inlet channel. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1:

[0051] like Figures 1-13 As shown, an explosion-proof oil-free air compressor includes a support 100 and an oil-free air compressor body 200 mounted on the support 100. A buffer structure 400 is provided above the oil-free air compressor body 200, and an explosion-proof layer 300 is provided between the buffer structure 400 and the oil-free air compressor body 200. It should be noted that the explosion-proof layer 300 is made of an alloy material, preferably aluminum alloy.

[0052] The buffer structure 400 includes a junction box 401, and a power cord inlet and outlet 402 is installed on the side wall of the junction box 401 to allow the power cord to enter and exit. A cover 409 is installed on the junction box 401, and a number of pressure relief grooves 410 are arranged in a ring array on the cover 409.

[0053] The buffer structure 400 also includes a chassis 411 disposed inside the wire box 401. A buffer chamber 403 is rotatably disposed on the chassis 411. A wire hole 425 is provided on the side of the buffer chamber 403 to allow the power cord to pass through.

[0054] A cover 404 is slidably mounted on the top of the buffer chamber 403. An extension frame 405 is mounted on the top of the cover 404. Multiple connecting rods 406 are mounted on the top of the extension frame 405, each located directly below a pressure relief groove 410. Each connecting rod 406 has a cylindrical plug 407 located inside the corresponding pressure relief groove 410. A sealing plug 408, adapted to fit the pressure relief groove 410, is mounted on the top of the cylindrical plug 407. The sealing plug 408 seals the pressure relief groove 410. The top of the plug serves as a dustproof barrier. When the internal air pressure cannot be released, the pressure can be released by opening the sealing plug 408. Located directly above the corresponding pressure relief groove 410, each cylindrical plug 407 has several arc-shaped grooves 4071 arranged in a ring array on its side wall. It should be noted that the arc-shaped grooves 4071 are arc-shaped, which allow the air pressure to be released while ensuring that the cylindrical plug 407 fits the inner wall of the pressure relief groove 410.

[0055] Specifically, by adding an explosion-proof layer 300 between the oil-free air compressor body 200 and the buffer structure 400, sparks are prevented from being generated due to poor contact between the power cord and the wiring, or from reacting with flammable substances in the air and causing an explosion. The aftershocks of the explosion affect the internal shell of the support 100, causing a propagation of the explosion. Furthermore, a buffer chamber 403 is added inside the junction box 401, and a sliding cover 404 is installed on the top of the buffer chamber 403. When the shock wave generated by the external explosion enters the interior of the junction box 401 before entering the explosion-proof layer 300, it rotates and then enters the inner side of the buffer chamber 403 through the wire hole 425. The shock wave automatically pushes the cover 404 upwards, causing multiple connecting wires above it to move upwards. The connecting rod 406 moves upward, while the cylindrical plug 407 and the sealing plug 408 both move upward relative to the cover 409. As a result, the multiple pressure relief grooves 410 that were originally sealed are opened simultaneously. The air pressure generated by the shock wave is partially released from the pressure relief grooves 410. The remaining shock wave may cross the junction box 401 and be depressurized by the explosion-proof layer 300. On the one hand, by providing double explosion-proof pressure relief for the power cord connection, the body 200 of the oil-free air compressor is further protected. On the other hand, by releasing part of the pressure from the pressure relief grooves 410, the impact of the instantaneous shock wave on the explosion-proof layer 300 can be reduced, avoiding the problem that the external explosion pressure may instantly exceed the pressure bearing limit of the explosion-proof layer 300, which could easily lead to direct rupture and failure of protection.

[0056] As a technical optimization of the present invention, a locking assembly is installed between the buffer compartment 403 and the chassis 411. The locking assembly includes an iron block 415 and two strong magnets 413. It should be noted that the contact surfaces of the strong magnets 413 and the iron block 415 are opposite polarity attraction surfaces, allowing the iron block 415 and the strong magnets 413 to come into contact and attract each other.

[0057] Iron block 415 is fixedly installed on the side wall of buffer chamber 403;

[0058] Two powerful magnets 413 are symmetrically arranged on both sides of the chassis 411, and each powerful magnet 413 is connected to the side wall of the chassis 411 by a mounting bracket 412.

[0059] Specifically, during the power cord routing process, the buffer chamber 403 is first rotated until the iron block 415 is attracted to a corresponding strong magnet 413. At this point, the wire hole 425 on the buffer chamber 403 is aligned with the power cord inlet / outlet 402 installed on the junction box 401. No secondary calibration is required, thus achieving convenient routing. Then, the buffer chamber 403 is rotated in the opposite direction until the iron block 415 is attracted to another strong magnet 413. At this point, the buffer chamber 403 has rotated 180 degrees, meaning the wire hole 425 faces away from the power cord inlet / outlet 402. This allows the shock wave to enter the junction box 401 before directly entering the buffer chamber 403, instead of directly entering the buffer chamber 403. Instead, the shock wave circulates inside the junction box 401 before entering the buffer chamber 403, providing a buffer space to mitigate the instantaneous impact of the explosion and improve explosion-proof capability.

[0060] As a technical optimization of the present invention, a plurality of vertically connected conduits 414 are provided on the chassis 411, all located inside the buffer chamber 403, and the conduits 414 are connected to the explosion-proof layer 300, allowing the power cord to pass through from the oil-free air compressor body 200 into the inside of the explosion-proof layer 300 and be used in conjunction with the wire hole 425 and the power cord inlet / outlet 402. It should be noted that the conduits 414 are preferably made of rubber, which has good elasticity and flexibility, meeting the requirements of this solution. Each conduit 414 is equipped with a compression assembly at its top.

[0061] Each extrusion assembly includes an internally threaded sleeve 416 and a compression sleeve 418, wherein...

[0062] The internal threaded sleeve 416 is set on the top surface of the chassis 411, between the conduit 414 and the buffer chamber 403, and the side wall of the compression sleeve 418 is provided with a lever 419, which can facilitate the rotation of the compression sleeve 418.

[0063] The compression sleeve 418 is a hollow frustum-shaped structure, and the lower end of the compression sleeve 418 is provided with an annular external threaded tube 417 that is compatible with the internal threaded sleeve 416.

[0064] Specifically, the power cable passing through the inside of the explosion-proof layer 300 is routed through the conduit 414 and the compression sleeve 418 into the inside of the buffer chamber 403. Then, by rotating the compression sleeve 418, the lower annular external threaded tube 417 is screwed into the inside of the internal threaded sleeve 416. This allows the compression sleeve 418 to compress the conduit 414 according to the actual radius of the power cable, thus compressing the gap between the conduit 414 and the power cable to a reasonable range. This prevents the gap between the conduit 414 and the power cable from being too large, which would cause the initial shock wave to completely penetrate into the interior of the explosion-proof layer 300.

[0065] As a technical optimization of the present invention, a guide rebound assembly is installed between the buffer chamber 403 and the chamber cover 404.

[0066] The guide rebound assembly includes several external slots 422 that are opened on the side wall of the buffer chamber 403 and are staggered with the wire hole 425. Each external slot 422 is provided with a sliding shaft 423. By opening slots on the side wall of the buffer chamber 403 to install the sliding shaft 423 instead of placing the sliding shaft 423 on the outside of the wire box 401, the space occupied inside the wire box 401 can be reduced, and the connecting block 420 can be doubly limited during the up and down movement, reducing the risk of track jamming.

[0067] The guide rebound assembly also includes connecting blocks 420 located at the lower end of the cover 404 and having the same number as the sliding shafts 423. Each connecting block 420 has a sliding groove 421 that is sleeved on the outside of the sliding shaft 423, and each sliding shaft 423 has a spring 424 sleeved on the outside. One end of the spring 424 is connected to the connecting block 420, and the other end of the spring 424 is connected to the buffer chamber 403.

[0068] Specifically, during the process of the cover 404 sliding up and down relative to the buffer chamber 403, the sliding shaft 423 can be used to limit the direction of movement of the cover 404, and the spring 424 can be used to reset the cover 404 after the shock wave is released.

[0069] As a technical optimization of the present invention, the sealing plug 408 is in the shape of a frustum, and the radius of the upper bottom surface of the sealing plug 408 is larger than the radius of the lower bottom surface. In the process of sealing the pressure relief groove 410, the shape of the frustum can be used to make better contact with the inner wall of the pressure relief groove 410, thus avoiding the infiltration of dust. Example 2:

[0070] Based on the above embodiments, the oil-free air compressor body 200 is further provided with a motor assembly 201, an eccentric wheel 206, and a crankcase assembly 207. The eccentric wheel 206 is located between the motor assembly 201 and the crankcase assembly 207, and the motor assembly 201, eccentric wheel 206, and crankcase assembly 207 are sequentially connected by transmission. Specifically, power is provided by the motor assembly 201, and the gas is compressed by the crankcase assembly 207 after being transmitted through the eccentric wheel 206.

[0071] The motor assembly 201 includes a round bearing 202 and an output shaft 2011. The output shaft 2011 is installed inside the round bearing 202. An adapter block 204 is also sleeved on the outside of the output shaft 2011. The adapter block 204 is sealed to the motor assembly 201 and is located on the side of the round bearing 202. This strengthens the wall thickness of the weak part of the round bearing 202 and can effectively prevent the explosion of flammable gas in the outside or the inside of the crankcase from affecting the explosion transmission inside the motor. Or, if flammable gas enters the inside of the motor and explodes, it prevents the explosion from being transmitted to the outside or the crankcase. Example 3:

[0072] Based on the above embodiments, a set of heat dissipation structures 500 are respectively installed at both ends of the oil-free air compressor body 200.

[0073] Each heat dissipation structure 500 includes a heat dissipation fan 501 and a dust cover 502. The dust cover 502 is installed on the outside of the heat dissipation fan 501 and serves as a protective measure to protect the inner heat dissipation fan 501.

[0074] The heat dissipation structure 500 also includes a heat dissipation channel 504 and an outlet 505, which are connected. The heat dissipation channel 504 is installed on the outside of the crankcase assembly 207 and the motor assembly 201. It can simultaneously cool the crankcase assembly 207, the motor assembly 201 and other surrounding gas compression components through the heat dissipation of the cooling fan 501, thereby reducing the temperature of the oil-free air compressor body 200 during operation and preventing the oil-free air compressor body 200 from overloading due to temperature, which could lead to an internal explosion of the oil-free air compressor body 200.

[0075] As a technical optimization of the present invention, the input end of the cooling fan 501 is connected to the output shaft 2011 through the coupling 503, that is, they share a motor assembly 201. This eliminates the need for an external power supply for the cooling fan 501, reduces the number of machine failure points, and improves the overall aesthetics of the machine. Example 4:

[0076] Based on the above embodiments, the oil-free air compressor body 200 is also equipped with a gas return structure 600. The gas return structure 600 includes an exhaust passage 604 and two intake passages 607. The crankcase assembly 207, the intake passages 607 and the exhaust passages 604 are connected in a continuous manner, and the two intake passages 607 are connected by an intake connector 606. One of the intake passages 607 is provided with an intake port 601, and the exhaust passage 604 is provided with an exhaust port 603. A solenoid valve 605 is provided on the exhaust passage 604 near the exhaust port 603. A return passage 602 is also connected in a continuous manner to the solenoid valve 605. The end of the return passage 602 away from the solenoid valve 605 is connected in a continuous manner to the intake passage 607.

[0077] Specifically, gas enters the nearest intake passage 607 through the intake port 601, then enters the crankcase assembly 207 through the intake connector 606 and is compressed. It then exits through the exhaust passage 604 and exits through the exhaust port 603. However, when the solenoid valve 605 stops supplying gas, but the oil-free air compressor body 200 continues to operate, the gas needs to circulate internally within the compressor. Therefore, after passing through the exhaust passage 604, the compressed gas does not flow out of the exhaust port 603, but instead flows back to the solenoid valve 605. The gas then re-enters the intake passage 607 through the return passage 602 and flows back into the crankcase assembly 207, where it is re-intaken and compressed. This prevents excessive gas pressure that could cause an explosion when the solenoid valve 605 stops supplying gas and the oil-free air compressor body 200 continues to operate. The gas circulates internally within the oil-free air compressor body 200 to maintain a self-sufficient internal circulation, preventing excessively high gas pressure. Example 5:

[0078] Based on the above embodiments, the eccentric wheel 206 is mounted on the oilless air compressor body 200 via a connecting bearing, and a bearing steel ring 208 is provided on the outer side of the connecting bearing. Oil seals 209 are provided on both sides of the connecting bearing, so that the connecting wheel bearing is placed between the two oil seals 209, thereby isolating the eccentric wheel 206 from the connecting bearing and preventing the connecting bearing from directly contacting external flammable gases, thereby reducing the explosion caused by friction of the connecting bearing.

[0079] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An explosion-proof oil-free air compressor, comprising a support (100) and an oil-free air compressor body (200) mounted on the support (100), characterized in that, A buffer structure (400) is provided above the oil-free air compressor body (200), and an explosion-proof layer (300) is provided between the buffer structure (400) and the oil-free air compressor body (200). The buffer structure (400) includes a junction box (401), a cover (409) is installed on the junction box (401), and a plurality of pressure relief grooves (410) are arranged in a ring array on the cover (409). The buffer structure (400) also includes a chassis (411) disposed inside the wire box (401), a buffer chamber (403) is rotatably disposed on the chassis (411), and a wire hole (425) is opened on the side of the buffer chamber (403). The top of the buffer chamber (403) is slidably provided with a chamber cover (404), and the top of the chamber cover (404) is rotatably provided with a riser frame (405). The riser frame (405) is provided with a plurality of connecting rods (406) located directly below the pressure relief groove (410). Each connecting rod (406) is provided with a cylindrical plug (407) located inside the corresponding pressure relief groove (410). The top of the cylindrical plug (407) is provided with a sealing plug (408) adapted to the pressure relief groove (410) located directly above the corresponding pressure relief groove (410). Several arc-shaped grooves (4071) are arranged in a ring array on the side wall of each cylindrical plug (407). The chassis (411) is provided with a number of vertically connected conduits (414), all located inside the buffer chamber (403), and the conduits (414) are connected to the explosion-proof layer (300). Each conduit (414) is equipped with a compression assembly at its top. Each of the extrusion assemblies includes an internally threaded sleeve (416) and a compression sleeve (418), wherein, The internal threaded sleeve (416) is disposed on the top surface of the chassis (411) between the conduit (414) and the buffer chamber (403); The compression sleeve (418) is a hollow frustum-shaped structure, and the lower end of the compression sleeve (418) is provided with an annular external threaded tube (417) that is compatible with the internal threaded sleeve (416). A guide rebound assembly is installed between the buffer chamber (403) and the chamber cover (404). The guide rebound assembly includes several external slots (422) opened on the side wall of the buffer chamber (403) and arranged in a staggered manner with the wire hole (425), and each external slot (422) is provided with a sliding shaft (423). The guide rebound assembly also includes connecting blocks (420) disposed at the lower end of the cover (404) and having the same number as the sliding shafts (423). Each connecting block (420) has a sliding groove (421) sleeved on the outside of the sliding shaft (423), and each sliding shaft (423) has a spring (424) sleeved on the outside. One end of the spring (424) is connected to the connecting block (420), and the other end of the spring (424) is connected to the buffer chamber (403).

2. The explosion-proof oil-free air compressor according to claim 1, characterized in that, A locking assembly is installed between the buffer compartment (403) and the chassis (411). The locking assembly includes an iron block (415) and two powerful magnets (413). The iron block (415) is fixedly installed on the side wall of the buffer chamber (403); Two powerful magnets (413) are symmetrically arranged on both sides of the chassis (411), and each of the powerful magnets (413) is connected to the side wall of the chassis (411) by a mounting bracket (412).

3. The explosion-proof oil-free air compressor according to claim 1, characterized in that, The oil-free air compressor body (200) is also equipped with a motor assembly (201), an eccentric wheel (206), and a crankcase assembly (207). The eccentric wheel (206) is located between the motor assembly (201) and the crankcase assembly (207), and the motor assembly (201), eccentric wheel (206), and crankcase assembly (207) are sequentially connected in a transmission manner. The motor assembly (201) includes a round bearing (202) and an output shaft (2011). The output shaft (2011) is installed on the inner side of the round bearing (202). An adapter block (204) is also sleeved on the outer side of the output shaft (2011). The adapter block (204) is sealed to the motor assembly (201) and is located on the side of the round bearing (202).

4. The explosion-proof oil-free air compressor according to claim 1, characterized in that, A set of heat dissipation structures (500) are installed at both ends of the oil-free air compressor body (200). Each heat dissipation structure (500) includes a heat dissipation fan (501) and a dust cover (502), the dust cover (502) being installed on the outside of the heat dissipation fan (501); The heat dissipation structure (500) further includes a heat dissipation channel (504) and an outlet (505), which are connected through each other, and the heat dissipation channel (504) is installed on the outside of the crankcase assembly (207) and the motor assembly (201).

5. The explosion-proof oil-free air compressor according to claim 4, characterized in that, The input end of the cooling fan (501) is connected to the output shaft (2011) via a coupling (503).

6. The explosion-proof oil-free air compressor according to claim 3, characterized in that, The oil-free air compressor body (200) is also equipped with a gas reflux structure (600). The gas recirculation structure (600) includes an exhaust passage (604) and two intake passages (607). The crankcase assembly (207), the intake passage (607) and the exhaust passage (604) are connected in a continuous manner. The two intake passages (607) are connected by an intake connector (606). One of the intake passages (607) is provided with an intake port (601). The exhaust passage (604) is provided with an exhaust port (603). A solenoid valve (605) is provided on the exhaust passage (604) near the exhaust port (603). A recirculation passage (602) is also connected in a continuous manner to the solenoid valve (605). The end of the recirculation passage (602) away from the solenoid valve (605) is connected in a continuous manner to the intake passage (607).

7. The explosion-proof oil-free air compressor according to claim 3, characterized in that, The eccentric wheel (206) is mounted on the body (200) of the oilless air compressor via a connecting bearing, and a bearing steel ring (208) is provided on the outer side of the connecting bearing. Oil seals (209) are provided on both sides of the connecting bearing.

8. The explosion-proof oil-free air compressor according to claim 1, characterized in that, The sealing plug (408) is frustum shaped, and the radius of the upper bottom surface of the sealing plug (408) is greater than the radius of the lower bottom surface.

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