Air intake structure and double horizontal opposed air compressor

Abstract

An air intake structure includes: an air intake box and a partition arranged in the air intake box, the partition divides the internal space of the air intake box into an air intake chamber and an air outlet chamber surrounding and connected to the outside of the air intake chamber, a sound insulation board is arranged in the air intake chamber, and the sound insulation board isolates the air intake chamber and the outlet chamber; at least one air intake pipe is provided in the air intake box, the air inlet of the air intake pipe is opened on the upper side or the lower side of the air intake box, the air intake pipe passes through the outlet chamber and extends into the air intake chamber, and the air outlet of the air intake pipe is connected to the air intake chamber. The beneficial effect of the present invention is: the internal space of the air intake box is divided into the air intake chamber and the air outlet chamber by the partition, the air flow path is optimized, and a sound insulation board is arranged in the air intake chamber, so that the air first passes through the air intake chamber inside the air intake box and then flows out of the air outlet chamber outside the air intake chamber, which can effectively reduce the noise generated by the air during high-speed inhalation and can filter dust and other impurities in the air.

Description

Technical Field

[0001] The present invention relates to the technical field of air compressors, and in particular to an air intake structure and a double horizontally opposed air compressor. Background Art

[0002] An air compressor is a mechanical device that uses an electric motor or other power source to compress air or other gases to a high pressure for storage or use in various industrial processes. Air compressors are widely used in a variety of industries, including manufacturing, construction, mining, and automotive repair, as a power source for pneumatic tools, pneumatic conveying systems, and other applications requiring compressed air.

[0003] However, existing single-V or twin-V compressors have several drawbacks in actual use. Besides vibration, the most notable issue is the high noise generated by the air intake. During operation, especially during the intake phase, the pistons of V-type compressors are not aligned, creating unbalanced forces. Air rushes rapidly through the intake, generating considerable noise. Furthermore, dust and other particulate matter in the air can easily enter the compressor through the airflow, causing wear and contamination of key compression components such as the piston, thereby reducing the equipment's efficiency and service life. Summary of the Invention

[0004] The present invention aims to solve the problems existing in the above-mentioned prior art and provide an air intake structure and a double horizontal opposed air compressor that reduce the noise generated when the air compressor is running and filter impurities in the air to improve the working efficiency.

[0005] The present invention solves the technical problem by adopting a technical solution: the air intake structure includes: an air intake box and a partition disposed in the air intake box, wherein the partition divides the internal space of the air intake box into an air intake chamber and an air outlet chamber surrounding the outside of the air intake chamber and communicating with the air intake chamber, and a sound insulation board is disposed in the air intake chamber to isolate the air intake chamber from the air outlet chamber;

[0006] At least one intake pipe is provided in the air intake box, and the air inlet of the intake pipe is opened on the upper side or the lower side of the air intake box. The intake pipe passes through the air outlet chamber and extends into the air intake chamber, and the air outlet of the intake pipe is connected with the air intake chamber. At least one exhaust pipe is provided on the left and right ends of the air intake box, and the air inlet of the exhaust pipe is connected with the air outlet chamber, and the air outlet of the exhaust pipe is connected with a piston compression assembly arranged externally.

[0007] Preferably, the air intake box includes a shell with an opening on one side and a shell cover connected to the shell to seal the opening to form the air intake chamber and the air outlet chamber, and the shell cover is detachably connected to the shell.

[0008] Preferably, the shell cover is provided with a plurality of buckles, and the shell body is provided with a plurality of slots at corresponding positions, and the buckles are engaged with the slots.

[0009] Preferably, the partition has a square structure and is arranged in the air intake box. The internal space of the partition forms the air intake chamber, and the space between the outer side of the partition and the air intake box forms the air outlet chamber. A plug-in sleeve is provided on the air intake box, and the plug-in sleeve is inserted into the air intake chamber, and the sound insulation board is arranged in the plug-in sleeve.

[0010] Preferably, a limiting portion is provided on the top of the plug-in / extraction sleeve, the lower end surface of the limiting portion abuts against the top surface of the partition, and the upper end surface of the limiting portion abuts against the shell cover.

[0011] Preferably, the lower end of the shell cover has an abutting top portion, which abuts against the upper end of the limiting portion, and a plurality of air guide holes are opened on the abutting top portion, and the air inlet chamber and the air outlet chamber are connected through the air guide holes.

[0012] Preferably, the sound insulation board is staggered and folded along its length direction, and the periphery of the sound insulation board abuts against the inner wall of the plug-in sleeve.

[0013] Preferably, a plurality of reinforcing ribs are evenly arranged on the outer side of the partition, and the reinforcing ribs are connected to the inner wall of the shell.

[0014] The present invention solves the above technical problems and also provides a double horizontal opposed air compressor, including the above-mentioned air intake structure, and also includes: a motor with openings at both ends, two air compression boxes respectively connected to the openings at both ends of the motor and forming end covers at both ends of the motor, the front and rear sides of each of the air compression boxes are oppositely provided with piston compression assemblies that can inhale or compress air and then exhaust, the two ends of the drive shaft of the motor extend into the two air compression boxes and are connected to the piston compression assemblies, wherein the air intake box is provided between the front and rear sides of the two air compression boxes.

[0015] Preferably, the piston compression assembly includes: an eccentric wheel, a connecting rod arm, a piston rod, a piston cylinder and an air valve cover, the drive shaft is installed in the eccentric wheel, one end of the connecting rod arm is connected to the eccentric wheel, and the other end of the connecting arm is connected to the piston rod, the air valve cover and the piston cylinder are connected to one side of the air compression box by bolts, a chamber is formed between the air valve cover and the piston cylinder, an air inlet port of the exhaust pipe is provided with an air inlet valve, and one end of the air valve cover is connected to the air inlet valve, and the other end of the air valve cover is provided with an air outlet valve, and the piston rod is movably inserted in the piston cylinder;

[0016] When the piston rod reciprocates in the piston cylinder, the gas in the exhaust pipe enters the chamber through the intake valve to be compressed and is discharged from the outlet valve.

[0017] The present invention has the following beneficial effects:

[0018] 1. The internal space of the air intake box is divided into an air intake chamber and an air outlet chamber by a partition, which optimizes the airflow path. A sound insulation board is installed in the air intake chamber, so that the air first passes through the air intake chamber inside the air intake box and then flows out of the air outlet chamber outside the air intake chamber. This can effectively reduce the noise generated by the high-speed air intake process, filter dust and other impurities in the air, prevent these impurities from entering the piston compression assembly, reduce wear on the compression assembly, and extend the service life of the equipment.

[0019] 2. The double horizontal opposed air compressor can better improve the compression efficiency, offset the reaction force generated by the opposing pistons, thereby reducing the vibration of the fuselage, further improving the stability of the air compressor and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of the air intake box in the first embodiment;

[0021] Figure 2 Schematic diagram of the internal structure of the air intake box in the first embodiment;

[0022] Figure 3 This is an exploded view of the structure of the air intake box in the first embodiment;

[0023] Figure 4 Schematic diagram of the structure of the shell cover in the first embodiment;

[0024] Figure 5 This is a schematic structural diagram of the dual horizontal opposed air compressors in the second embodiment;

[0025] Figure 6 Schematic diagram of the internal structure of the dual horizontal opposed air compressor in the second embodiment.

[0026] Description of reference numerals:

[0027] 1. Air inlet box; 10. Shell; 11. Shell cover; 100. Partition; 101. Air inlet chamber; 102. Air outlet chamber; 103. Sound insulation board; 104. Air inlet pipe; 105. Exhaust pipe; 106. Insertion and extraction sleeve; 107. Slot; 108. Limiting part; 109. Top part; 110. Air guide hole; 111. Buckle; 112. Reinforcement rib

[0028] 2. Motor; 20. Air compressor box; 21. Piston compression assembly; 200. Eccentric wheel; 201. Connecting rod arm; 202. Piston rod; 203. Piston cylinder; 204. Valve cover; 205. Exhaust valve; 206. Inlet valve. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings:

[0030] Example 1

[0031] Refer to the attached Figures 1 to 4 As shown, an air intake structure comprises: an air intake box 1 and a partition 100 arranged in the air intake box 1, the partition 100 divides the internal space of the air intake box 1 into an air intake chamber 101 and an air outlet chamber 102 surrounding the outside of the air intake chamber 101 and communicating with the air intake chamber 101, a sound insulation board 103 is arranged in the air intake chamber 101, and the sound insulation board 103 isolates the air intake chamber 101 and the air outlet chamber 102; at least one air intake box 1 is provided with a The air pipe 104, the air inlet of the air pipe 104 is opened on the upper side or the lower side of the air intake box 1, the air intake pipe 104 passes through the air outlet chamber 102 and extends into the air intake chamber 101, and the air outlet of the air intake pipe 104 is connected with the air intake chamber 101, and at least one exhaust pipe 105 is provided on the left and right ends of the air intake box 1, the air inlet of the exhaust pipe 105 is connected with the air outlet chamber 102, and the air outlet of the exhaust pipe 105 is connected with the piston compression assembly 21 arranged outside.

[0032] The air intake box 1, as the core component of the entire air intake structure, has a partition 100 designed inside it. This partition 100 divides the internal space of the air intake box 1 into two main areas (the air intake chamber 101 and the air outlet chamber 102). The air intake chamber 101 is located inside the partition 100 and is mainly used to receive air from the outside; while the air outlet chamber 102 surrounds the outside of the air intake chamber 101 and is responsible for the subsequent guidance and discharge of air. A soundproofing board 103 is set inside the air intake chamber 101. Its main function is to reduce the noise generated during the air intake process and filter out impurities in the air, protecting the key components inside the air compressor from contamination, thereby improving work efficiency and extending the service life of the equipment. The air intake box 1 is provided with an air inlet on the lower side, which is connected to the outside world through at least one air intake pipe 104. In this embodiment, the air intake box 1 is equipped with three air intake pipes 104, each of which passes through the air outlet chamber 102 and extends into the air intake chamber 101. This design helps to optimize the airflow path, ensure that the air can smoothly enter the air intake chamber 101, and be processed by the sound insulation board 103. In addition, at least one exhaust pipe 105 is provided at each of the left and right ends of the air intake box 1. The air inlets of these exhaust pipes 105 are connected to the air outlet chamber 102, and the air outlets are connected to the external piston compression assembly 21. Specifically, in this embodiment, two exhaust pipes 105 are provided at both ends of the air intake box 1. The external air first enters the air intake pipe 104 and is guided into the air intake chamber 101. During this process, the air is filtered and soundproofed by the sound insulation board 103, and then flows into the air outlet chamber 102. Finally, the treated air is sent to the piston compression assembly 21 through the exhaust pipe 105 for further compression processing.

[0033] It is worth mentioning that in this embodiment, three intake pipes 104 are provided, and two exhaust pipes 105 are provided at the left and right ends of the air intake box 1, but it is not limited to the above number, and can also be one, two or four, etc., according to the size and structure of the air intake box 1. The air inlet of the intake pipe 104 is located on the lower side of the air intake box 1, but is not limited to the lower side, and can also be provided on the upper side of the air intake box 1.

[0034] Preferably, if Figures 2 to 4 As shown, the air intake box 1 includes a shell 10 with an opening on one side and a shell cover 11 connected to the shell 10 to seal the opening to form an air intake chamber 101 and an air outlet chamber 102. The shell cover 11 is detachably connected to the shell 10.

[0035] The shell 10 is the main component of the air intake box 1. An opening is designed on it to constitute the basic structure of the air intake box 1. The shell cover 11 is connected to the shell 10, and their common function is to close the opening of the shell 10, thereby forming a complete air intake chamber 101 and an air outlet chamber 102. This design ensures that the air can flow along a predetermined path (from inside to outside), prevents external impurities from entering, maintains the sealing of the structure, and can also achieve a noise reduction effect. In this embodiment, the shell cover 11 adopts a detachable design, which means that it can be easily separated from the shell 10. This design simplifies the maintenance process when maintenance work such as cleaning the interior of the air intake box 1 or replacing the sound insulation board 103 is required, and also improves work efficiency, because the staff can access the internal components without disassembling the entire air intake box 1 to perform inspection and replacement of the sound insulation board 103. This design not only improves the convenience of maintenance, but also helps to extend the service life of the air intake box 1 and its internal components.

[0036] Further, if Figures 2 to 4 As shown, a plurality of buckles 111 are provided on the shell cover 11 , and a plurality of slots 107 are opened at corresponding positions on the housing 10 , and the buckles 111 are engaged with the slots 107 .

[0037] The shell cover 11 is provided with a number of clips 111, which are used to cooperate with the slots 107 on the shell 10 to achieve a fixed connection between the shell cover 11 and the shell 10. This clip 111 design makes the installation and removal of the shell cover 11 very simple. Only manual operation is required to complete the cleaning of the interior of the air intake box 1 or replacement of the sound insulation board 103, etc., ensuring a tight connection between the shell cover 11 and the shell 10, and ensuring the overall sealing and stability of the air intake box 1.

[0038] Preferably, if Figure 2 and Figure 3 As shown, the partition 100 has a square structure and is arranged in the air intake box 1. The internal space of the partition 100 forms an air intake chamber 101, and the space between the outer side of the partition 100 and the air intake box 1 forms an air outlet chamber 102. A plug-in sleeve 106 is provided on the air intake box 1, and the plug-in sleeve 106 is inserted into the air intake chamber 101, and the sound insulation board 103 is arranged in the plug-in sleeve 106.

[0039] The partition 100 and the air intake box 1 are manufactured by integral injection molding. This design ensures the structural strength and sealing between the partition 100 and the air intake box 1, and improves the noise reduction effect. The partition 100 is bent into a square structure inside the air intake box 1. Its function is to divide the internal space of the air intake box 1 into two independent but connected parts. The space inside the partition 100 (the air intake chamber 101) is the first stop for air to enter. The air intake chamber 101 is mainly used to receive air from the outside. The air enters here through the air intake pipe 104 and starts its processing process. The space between the outside of the partition 100 and the air intake box 1 (the air outlet chamber 102) is connected to the air intake chamber 101. The air that has been preliminarily treated will flow from the air intake chamber 101 into the air outlet chamber 102, and then pass through the exhaust pipe 105 is sent to the next processing or compression link. In order to further optimize the function of the air intake chamber 101, a plug-in sleeve 106 is designed on the air box 1. The plug-in sleeve 106 is specially used for installing the sound insulation board 103 and is designed to be easily inserted into the air intake chamber 101. This design not only facilitates the installation of the sound insulation board 103, but also greatly simplifies daily maintenance and cleaning work; when the sound insulation board 103 needs to be replaced or cleaned, the user can easily pull out the plug-in sleeve 106, perform the corresponding operation and then reinsert it, ensuring the convenience of maintenance work. This design of the integral injection-molded partition 100 combined with the air intake box 1, plus the easy-to-install and disassemble plug-in sleeve 106, not only ensures the effective separation of the internal space of the air intake box 1, but also improves the maintenance efficiency, ensuring the efficient operation of the entire air intake system.

[0040] Further, if Figure 2 and Figure 3 As shown, a limiting portion 108 is provided on the top of the extraction and insertion sleeve 106 , the lower end surface of the limiting portion 108 abuts against the top surface of the partition 100 , and the upper end surface of the limiting portion 108 abuts against the shell cover 11 .

[0041] The limiting portion 108 is provided at the top of the tube extraction sleeve 106 to limit the position of the tube extraction sleeve 106. The lower end surface of the limiting portion 108 abuts against the top surface of the partition 100, and the upper end surface abuts against the shell cover 11 to ensure the stable positioning of the tube extraction sleeve 106. The design of the limiting portion 108 ensures the stable installation of the tube extraction sleeve 106 to avoid displacement during use. This design not only improves the stability of the installation of the tube extraction sleeve 106, but also ensures that the sound insulation board 103 can always be in the correct position, thereby achieving the best sound insulation effect. At the same time, the stable installation also reduces the risk of displacement due to vibration or airflow impact, thereby enhancing the reliability and durability of the entire air intake system.

[0042] Further, if Figures 2 to 5As shown, the lower end of the shell cover 11 has a butt-jointing top 109 , which abuts against the upper end of the limiting portion 108 , and a plurality of air guide holes 110 are opened on the butt-jointing top 109 , through which the air inlet chamber 101 and the air outlet chamber 102 are connected.

[0043] The abutting portion 109 is provided at the lower end of the shell cover 11, and its purpose is to abut against the upper end of the limiting portion 108 of the plug-in sleeve 106, thereby ensuring that the plug-in sleeve 106 is firmly installed in the air inlet chamber 101. The abutting portion 109 is provided with air guide holes 110, which enable the exhaust pipe 105 to communicate with the air outlet chamber 102, thereby achieving smooth flow of gas from the air inlet chamber 101 to the air outlet chamber 102. Specifically, when the shell cover 11 is installed in place, the top portion 109 is in contact with the limiting portion 108 on the top of the plug-in sleeve 106. This contact not only limits the position of the plug-in sleeve 106, but also ensures its stability during operation and avoids displacement caused by vibration or other external forces. The air guide holes 110 opened on the top portion 109 are the key paths for gas flow. The presence of these holes allows the gas in the air inlet chamber 101 to flow smoothly through these holes after preliminary treatment (such as filtering and sound insulation). The purpose of the air outlet chamber 102 is to optimize the air flow path, ensure that the air can smoothly transition from the air inlet chamber 101 to the air outlet chamber 102, and finally be sent to the piston compression assembly 21 through the exhaust pipe 105 for further processing. Through the cooperation of the top portion 109 and the limiting portion 108, the plug-in sleeve 106 can be firmly installed, ensuring the normal operation of the sound insulation board 103 and other components, and the design of the air guide hole 110 ensures unimpeded gas flow, thereby improving the efficiency and reliability of the entire intake system.

[0044] Further, if Figure 2 As shown, the sound insulation board 103 is staggered and folded along its length direction, and the periphery of the sound insulation board 103 abuts against the inner wall of the plug-in sleeve 106.

[0045] The sound insulation board 103 can be made of materials such as carbon fiber. During manufacturing, the sound insulation board 103 is designed to be staggered and folded along its length. This structure not only increases the contact area of ​​the sound insulation board 103 with the airflow, but also further enhances the sound insulation effect by increasing the complexity of the sound wave propagation path. The staggered folding design requires the sound waves to undergo more reflection and absorption when passing through the sound insulation board 103, thereby effectively reducing the transmission of noise. In addition, the periphery of the sound insulation board 103 is tightly against the inner wall of the plug-in sleeve 106. This design ensures the stability of the sound insulation board 103 after installation; when the sound insulation board 103 is inserted into the plug-in sleeve 106, the close contact between the four sides and the inner wall of the sleeve not only limits the position of the sound insulation board 103, but also prevents displacement caused by airflow impact or mechanical vibration, thereby ensuring the stable performance of the sound insulation board 103 during the entire use process.

[0046] Further, if Figure 2 As shown, a plurality of reinforcing ribs 112 are evenly arranged on the outer side of the partition 100 , and the reinforcing ribs 112 are connected to the inner wall of the shell 10 .

[0047] The reinforcing ribs 112 are evenly distributed on the outer side of the partition 100 and connected to the inner wall of the shell 10, thereby enhancing the structural stability of the partition 100 and ensuring the stability and durability of the entire air intake structure.

[0048] Example 2

[0049] Refer to the attached Figures 1 to 6 As shown, the present invention also provides a double horizontal opposed air compressor, including an air intake structure in the above-mentioned embodiment 1, and also including: a motor 2 with openings at both ends, two air compression boxes 20 respectively connected to the openings at both ends of the motor 2 and forming end covers at both ends of the motor 2, and the front and rear sides of each air compression box 20 are oppositely provided with piston compression assemblies 21 that can inhale or compress air and then exhaust, and the two ends of the drive shaft of the motor 2 extend into the two air compression boxes 20 and are connected to the piston compression assemblies 21, wherein an air intake box 1 is provided between the front and rear sides of the two air compression boxes 20.

[0050] The motor 2 is connected to the two air compressor boxes 20 through the openings at both ends to form a whole. The motor 2 is responsible for driving the opposing piston compression assemblies 21 in the air compressor box 20. In this embodiment, two air compressor boxes 20 are provided to better improve the compression efficiency. The reaction forces generated by the opposing piston compression assemblies 21 during operation can offset each other, thereby reducing the vibration and noise of the machine body. This design makes the machine run more smoothly and extends the service life of the equipment. An air intake box 1 is provided between the front sides of the two air compressor boxes 20 and between the rear sides of the two air compressor boxes 20, which can effectively reduce the intake noise of the double horizontal opposed air compressor, and can also effectively prevent impurities from entering and affecting the single-side piston compression assembly 21, thereby causing the problem of balance failure. It can also filter out impurities such as dust in the air, thereby protecting the piston compression assembly 21 from damage, improving the compression efficiency and the service life of the equipment.

[0051] like Figure 6 As shown, the piston compression assembly 21 includes: an eccentric wheel 200, a connecting rod arm 201, a piston rod 202, a piston cylinder 203 and an air valve cover 204. The drive shaft is installed in the eccentric wheel 200, one end of the connecting rod arm 201 is connected to the eccentric wheel 200, and the other end of the connecting arm 201 is connected to the piston rod 202. The air valve cover 204 and the piston cylinder 203 are connected to one side of the air compressor box 20 by bolts. A chamber is formed in the middle, an intake valve 206 is provided on the air inlet of the exhaust pipe 105, and one end of the valve cover 204 is connected to the intake valve 206, and an outlet valve 205 is provided on the other end of the valve cover 204, and the piston rod 202 is movably inserted in the piston cylinder 203; when the piston rod 202 reciprocates in the piston cylinder 203, the gas in the exhaust pipe 105 enters the chamber through the intake valve 206 to be compressed and discharged from the outlet valve 205.

[0052] After the motor 2 is started, the drive shaft begins to rotate, driving the eccentric wheel 200 connected to it to rotate together. The rotation of the eccentric wheel 200 is transmitted to the piston rod 202 through the connecting rod arm 201, causing the piston rod 202 to reciprocate up and down in the piston cylinder 203. When the piston rod 202 moves outward, the space inside the piston cylinder 203 becomes larger, forming a negative pressure. At this time, the outside air is sucked into the piston cylinder 203 through the intake valve 206 in the intake pipe 104. The design of the intake valve 206 ensures that the air can only enter the piston cylinder 203 in one direction without backflow. Then, when the piston rod 202 moves outward, the space inside the piston cylinder 203 becomes larger, forming a negative pressure. At this time, the outside air is sucked into the piston cylinder 203 through the intake valve 206 in the intake pipe 104. The design of the intake valve 206 ensures that the air can only enter the piston cylinder 203 in one direction without backflow. When 202 moves inward, the space inside the piston cylinder 203 decreases, the air is compressed, and the pressure increases accordingly. As the pressure increases, the compressed air enters the chamber through the connecting channel between the piston cylinder 203 and the air valve cover 204. The air valve cover 204 is provided with an outlet valve 205. When the pressure of the compressed air exceeds a certain threshold, the outlet valve 205 opens, and the compressed air is discharged to the external equipment or the air storage tank through the outlet valve 205. Through this series of actions, the air compressor realizes the process of air intake, compression and discharge, providing the required compressed air source for the external equipment.

[0053] Certain terms are used throughout the specification and claims of this invention to refer to specific products. Those skilled in the art will understand that manufacturers may refer to the same component by different names. This document does not intend to distinguish between components that have the same function but are named differently. In the following description and claims, the words "comprising," "having," and "including" are open-ended and should be interpreted as meaning "including, but not limited to..."

[0054] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. An air intake structure, characterized in that: include: An air intake box and a partition disposed within the air intake box, the partition dividing the interior space of the air intake box into an air intake chamber and an air outlet chamber surrounding the outside of the air intake chamber and communicating with the air intake chamber, a sound insulation board disposed within the air intake chamber, and the partition isolating the air intake chamber from the air outlet chamber; At least one intake pipe is provided in the air intake box, an air inlet of the intake pipe is opened on the upper side or the lower side of the air intake box, the intake pipe passes through the air outlet chamber and extends into the air intake chamber, and the air outlet of the intake pipe is communicated with the air intake chamber, at least one exhaust pipe is provided on the left and right ends of the air intake box, the air inlet of the exhaust pipe is communicated with the air outlet chamber, and the air outlet of the exhaust pipe is communicated with a piston compression assembly provided externally; Among them, the air intake box is provided with an insertion and extraction tube sleeve, the insertion and extraction tube sleeve is inserted into the air intake chamber, and the sound insulation board is arranged in the insertion and extraction tube sleeve; the sound insulation board is staggered and folded along its length direction, and the periphery of the sound insulation board is against the inner wall of the insertion and extraction tube sleeve.

2. The air intake structure according to claim 1, characterized in that: The air inlet box includes a shell with an opening on one side and a shell cover connected to the shell to seal the opening to form the air inlet chamber and the air outlet chamber. The shell cover is detachably connected to the shell.

3. The air intake structure according to claim 2, characterized in that: The shell cover is provided with a plurality of buckles, and the shell body is provided with a plurality of slots at corresponding positions, and the buckles are engaged with the slots.

4. The air intake structure according to claim 2, wherein: The partition is in a square structure and is arranged in the air inlet box. The inner space of the partition forms the air inlet chamber, and the space between the outer side of the partition and the air inlet box forms the air outlet chamber.

5. The air intake structure according to claim 4, characterized in that: A limiting portion is provided on the top of the insertion and extraction sleeve, the lower end surface of the limiting portion abuts against the top surface of the partition, and the upper end surface of the limiting portion abuts against the shell cover.

6. The air intake structure according to claim 5, characterized in that: The lower end of the shell cover has an abutting top portion, which abuts against the upper end of the limiting portion, and a plurality of air guide holes are opened on the abutting top portion, and the air inlet chamber and the air outlet chamber are connected through the air guide holes.

7. The air intake structure according to claim 4, characterized in that: A plurality of reinforcing ribs are evenly arranged on the outer side of the partition, and the reinforcing ribs are connected to the inner wall of the shell.

8. A twin-horizontally opposed air compressor comprising the air intake structure according to any one of claims 1 to 7, characterized in that: include: A motor with openings at both ends, two air compression boxes respectively connected to the openings at both ends of the motor and forming end covers at both ends of the motor, each of the air compression boxes has piston compression assemblies capable of inhaling or compressing air and then exhausting it arranged horizontally on the front and rear sides, the two ends of the motor's drive shaft extend into the two air compression boxes and are connected to the piston compression assemblies, wherein the air intake box is provided between the front and rear sides of the two air compression boxes.

9. The dual horizontal opposed air compressor according to claim 8, characterized in that: The piston compression assembly includes: an eccentric wheel, a connecting rod arm, a piston rod, a piston cylinder and an air valve cover, the drive shaft is installed in the eccentric wheel, one end of the connecting rod arm is connected to the eccentric wheel, and the other end of the connecting arm is connected to the piston rod, the air valve cover and the piston cylinder are connected to one side of the air compression box by bolts, a chamber is formed between the air valve cover and the piston cylinder, an air inlet port of the exhaust pipe is provided with an air inlet valve, and one end of the air valve cover is connected to the air inlet valve, and the other end of the air valve cover is provided with an air outlet valve, and the piston rod is movably inserted in the piston cylinder; When the piston rod reciprocates in the piston cylinder, the gas in the exhaust pipe enters the chamber through the intake valve to be compressed and is discharged from the outlet valve.

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