Noise reduction device for exhaust of pneumatic equipment

Abstract

The utility model discloses a noise reduction device for exhaust of pneumatic equipment, which comprises an outer barrel with an opening at the top and an exhaust cover plate covering the opening at the top of the outer barrel, and a plurality of exhaust holes are arranged on the exhaust cover plate. The partition plate is arranged in the outer barrel and divides an inner cavity of the outer barrel into an upper cavity and a lower cavity, an exhaust port is formed in the partition plate, and an exhaust valve plate capable of changing the opening degree of the exhaust port is arranged at the exhaust port; an air inlet communicated with the lower cavity and used for being externally connected with an exhaust pipe of pneumatic equipment is formed in the outer cylinder body; the exhaust noise at the exhaust port of the factory pneumatic equipment can be effectively reduced, so that the factory noise does not exceed the standard, and the influence on the health of operators in a factory workshop is reduced; meanwhile, a plurality of pneumatic devices can be connected to the noise reduction device for exhaust of the pneumatic devices through pipelines at the same time, the noise reduction device can adapt to different discharge capacities by adjusting the opening degree of the exhaust valve plate, and the overall investment cost is low; and the whole structure is simple, and the investment cost can be reduced.

Description

Technical Field

[0001] The utility model belongs to the field of noise reduction device design, and in particular relates to a noise reduction device for exhaust of pneumatic equipment. Background Art

[0002] Pneumatic equipment is a device that uses compressed air as a power source to drive machinery to complete operations such as extension or rotation. After performing an operation, pneumatic equipment will intermittently and instantly discharge compressed gas, and its exhaust port will often produce a large noise due to the high-speed flow of gas. Especially in the factory workshop operation site, there are a large number of pneumatic operation equipment, which can easily make the workshop noise standard not meet the standard. The noise generated by the exhaust of pneumatic equipment not only affects the environment, but also brings occupational disease hazards to the workers in the factory workshop. In the prior art, in order to reduce noise, a muffler is usually designed and installed at the exhaust port of each pneumatic equipment. However, in the existing muffler structure for pneumatic equipment, the muffler channel is usually not adjustable, and can only meet the use requirements of a specific gas displacement, and cannot meet the use requirements of multiple pneumatic equipment or variable displacement pneumatic equipment; different types of mufflers can only be customized for pneumatic equipment under specific usage conditions, which has a high investment cost.

[0003] Therefore, there is an urgent need to provide a silencer for reducing the exhaust noise of pneumatic equipment, so as to reduce the noise in the factory workshop environment and reduce the physical harm to the operators; at the same time, the silencer is required to meet the needs of using multiple pneumatic equipment together or variable displacement pneumatic equipment, thereby reducing the factory's investment cost. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a noise reduction device for pneumatic equipment exhaust, so as to solve the technical problems in the prior art that the exhaust port of pneumatic equipment has high noise, the noise in the factory workshop easily exceeds the standard, and the factory investment cost is high.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a noise reduction device for exhaust of pneumatic equipment, comprising an outer cylinder with an opening at the top, an exhaust cover plate covering the top opening of the outer cylinder, and a plurality of exhaust holes being arranged on the exhaust cover plate; further comprising a partition plate arranged in the outer cylinder to divide the inner cavity of the outer cylinder into an upper cavity and a lower cavity, an exhaust port being arranged on the partition plate, and an exhaust valve plate capable of changing the opening size of the exhaust port being arranged at the exhaust port; an air inlet connected to the lower cavity for connecting to an exhaust pipe of an external pneumatic equipment is arranged on the outer cylinder.

[0006] Furthermore, the exhaust cover plates are multiple, and the exhaust cover plates are arranged in a layered structure with a certain gap between them.

[0007] Furthermore, the exhaust holes on the exhaust cover plates of each layer are arranged in a staggered manner.

[0008] Furthermore, a rubber airbag designed to conform to the shape of the lower cavity is provided in the lower cavity.

[0009] Furthermore, the partition plate is provided with a slide groove, and the exhaust valve plate is slidably arranged in the slide groove; a push rod is fixedly connected to the exhaust valve plate, and the push rod extends outwardly through the wall of the outer cylinder and then exposed to the outer wall of the outer cylinder.

[0010] Furthermore, a rubber handle is fixed to the tail end of the push rod.

[0011] Furthermore, the partition board is arranged horizontally.

[0012] Furthermore, the air inlet is connected to an air inlet pipe, and an air inlet one-way valve is arranged on the air inlet pipe.

[0013] Furthermore, the air inlet is arranged at the bottom of the side wall of the outer cylinder.

[0014] Furthermore, the outer cylinder is a stainless steel cylinder, and the exhaust cover is a stainless steel plate.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The noise reduction device for pneumatic equipment exhaust provided by the utility model can effectively reduce the exhaust noise at the exhaust port of the pneumatic equipment in the factory, thereby ensuring that the factory noise does not exceed the standard and reducing the health impact on the workers in the factory workshop; at the same time, multiple pneumatic equipment can be connected to the noise reduction device for pneumatic equipment exhaust at the same time through pipelines, and can adapt to different displacement sizes by adjusting the opening size of the exhaust valve plate, and the overall investment cost is small; and the overall structure is simple, which is also conducive to reducing the investment cost; the noise reduction device for pneumatic equipment exhaust provided by the present application is particularly suitable for sharing of multiple equipment in a factory, reducing the overall investment cost.

[0017] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model

[0019] Figure 2 This is a schematic diagram of the shaft side structure of the utility model

[0020] Figure 3 This is a schematic diagram of the shaft side structure of the utility model after removing the exhaust cover plate

[0021] Figure markings: 1-outer cylinder; 101-upper chamber; 102-lower chamber; 103-air inlet; 2-exhaust cover plate; 201-exhaust hole; 3-partition plate; 301-exhaust port; 302-slide groove; 4-exhaust valve plate; 401-push rod; 402-rubber handle; 5-rubber airbag; 6-inlet pipe; 7-inlet check valve. DETAILED DESCRIPTION

[0022] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other without conflict.

[0023] See also Figure 1-3 The present embodiment discloses a noise reduction device for exhaust of pneumatic equipment, comprising an outer cylinder 1 with an opening at the top, wherein the outer cylinder 1 may be a circular cylinder, a rectangular cylinder, etc., and a circular cylinder is preferably used; an exhaust cover plate 2 covering the top opening of the outer cylinder 1, wherein the exhaust cover plate 2 is provided with a plurality of exhaust holes 201, wherein "covering" here means sealing the top opening of the outer cylinder 1, and the connection may be completed by welding, bolting, etc., wherein the outer cylinder 1 and the exhaust cover plate 2 are welded, and the plurality of exhaust holes 201 are preferably evenly distributed; and further comprising The partition plate 3 is arranged in the outer cylinder 1 to divide the inner cavity of the outer cylinder 1 into an upper cavity 101 and a lower cavity 102. Specifically, the partition plate 3 can be fixed on the inner wall of the outer cylinder 1 by welding or the like; the partition plate 3 is provided with an exhaust port 301, and an exhaust valve plate 4 which can change the opening size of the exhaust port 301 is provided at the exhaust port 301. The exhaust valve plate 4 can be manual or electric, and is manual here; the outer cylinder 1 is provided with an air inlet 103 which is connected to the lower cavity 102 and is used for connecting an exhaust pipe of an external pneumatic device;

[0024] The implementation principle of this noise reduction device for pneumatic equipment exhaust is as follows: the exhaust pipe of the pneumatic equipment is connected to the air inlet 103, and the lower chamber 102 plays a role in caching, reducing pressure and speed of the exhaust gas, thereby playing a primary noise reduction role. Here, the noise at the air inlet 103 is isolated by the outer cylinder, and the noise entering the external environment is small; then the gas after the pressure reduction and speed reduction through the lower chamber 102 enters the upper chamber 101 and is discharged through the exhaust hole 201. The exhaust cover plate 2 is equivalent to a noise reduction grille plate, which plays a secondary noise reduction role; the secondary noise reduction can effectively reduce the exhaust noise from the exhaust hole 201, which is equivalent to reducing the exhaust noise at the exhaust port of the factory pneumatic equipment, thereby ensuring the factory noise It does not exceed the standard, reducing the impact on the health of workers in the factory workshop; when multiple pneumatic equipment share the pneumatic equipment exhaust noise reduction device, or when the displacement is large, the position of the exhaust valve plate 4 can be appropriately adjusted, and the exhaust port 301 can be enlarged to ensure the smooth discharge of the gas, thereby not affecting the smooth discharge of the gas and the normal operation of the pneumatic equipment. It can be suitable for the common use of different displacements or multiple pneumatic equipment, and the overall investment cost is low; of course, when adjusting the exhaust valve plate 4, it is necessary to ensure that the emission noise does not exceed the standard. The noise can be detected by holding a noise detector at the exhaust hole 201 to see if the noise exceeds the standard, thereby controlling the position of the exhaust valve plate 4 accordingly; the overall structure is simple, which is also conducive to reducing investment costs.

[0025] In this embodiment, the exhaust cover plates 2 are multiple in number, and each exhaust cover plate 2 is arranged in a layered structure with a certain gap between them. Preferably, each layer is spaced 5-10 mm apart. Arranging multiple layers of exhaust cover plates 2 is beneficial to further improve the noise reduction effect at the exhaust cover plates 2.

[0026] In this embodiment, the exhaust holes 201 on each layer of the exhaust cover plates 2 are staggered. The staggered arrangement refers to that the exhaust holes 201 on each layer of the exhaust cover plates 2 are staggered at a certain angle. This is achieved by rotating each layer of the exhaust cover plates 2 by a certain angle and then installing them on the outer cylinder 1. This structural design is beneficial to enhancing the sound-absorbing impedance between each layer of the exhaust cover plates 2, thereby further improving the noise reduction effect.

[0027] In this embodiment, a rubber airbag 5 conformally designed to the lower chamber 102 is provided in the lower chamber 102. Specifically, an opening is provided on the rubber airbag 5, and the opening corresponds to the exhaust port 301. The design of the rubber airbag 5 is conducive to improving the sound insulation and sound absorption effects in the lower chamber 102, further improving the noise reduction effect of the overall device, and the rubber airbag 5 has good durability. At the same time, the rubber airbag 5 has a certain shrinkage and expansion ability, which improves the adaptability to gases of different displacements, avoids excessive pressure in the lower chamber when the gas displacement suddenly increases, and damages the device, thereby improving safety in use.

[0028] In this embodiment, a slide groove 302 is provided on the partition plate 3, and the exhaust valve plate 4 is slidably set in the slide groove 302; a push rod 401 is fixedly connected to the exhaust valve plate 4, such as by welding or screw connection, and the push rod 401 extends outwardly through the wall of the outer cylinder 1 and is exposed to the outer wall of the outer cylinder 1; during use, the position of the exhaust valve plate 4 can be adjusted by manually pulling or pushing the push rod 401, which has a simple structure and is conducive to reducing costs.

[0029] In this embodiment, a rubber handle 402 is fixed to the tail end of the push rod 401, and the rubber handle 402 is provided to facilitate operation.

[0030] In this embodiment, the partition plate 3 is arranged horizontally. The horizontal arrangement has a simple structure and is convenient for arranging and installing the partition plate 3. The formed upper cavity 101 and lower cavity 102 have good noise reduction effect.

[0031] In this embodiment, the air inlet 103 is connected to an air inlet pipe 6, such as by welding, and an air inlet check valve 7 is provided on the air inlet pipe 6; the air inlet check valve 7 can prevent gas backflow from affecting the normal operation of the equipment.

[0032] In this embodiment, the air inlet 103 is arranged at the bottom of the side wall of the outer cylinder 1; being arranged at the bottom of the side wall of the outer cylinder 1 is conducive to the gas being discharged laterally into the lower chamber 102, and is conducive to forming an impact with the lower chamber 102, which has a good buffering effect and is conducive to further improving the noise reduction effect.

[0033] In this embodiment, the outer cylinder 1 is a stainless steel cylinder, and the exhaust cover plate 2 is a stainless steel plate; the material is cheap and is easy to weld and assemble. At the same time, the structural strength is good, which is conducive to ensuring durability and has good rust resistance.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A noise reduction device for exhaust of pneumatic equipment, characterized in that: It comprises an outer cylinder (1) with an opening at the top, and an exhaust cover plate (2) covering the top opening of the outer cylinder (1), wherein the exhaust cover plate (2) is provided with a plurality of exhaust holes (201); The invention also comprises a partition plate (3) which is arranged in the outer cylinder (1) and divides the inner cavity of the outer cylinder (1) into an upper cavity (101) and a lower cavity (102); the partition plate (3) is provided with an exhaust port (301), and an exhaust valve plate (4) which can change the opening size of the exhaust port (301) is provided at the exhaust port (301); the outer cylinder (1) is provided with an air inlet (103) which is connected to the lower cavity (102) and is used for connecting to an exhaust pipe of an external pneumatic device.

2. The noise reduction device for exhaust of pneumatic equipment according to claim 1, characterized in that: The exhaust cover plates (2) are multiple in number, and the exhaust cover plates (2) are arranged in a layered structure with a certain gap between them.

3. The noise reduction device for exhaust of pneumatic equipment according to claim 2, characterized in that: The exhaust holes (201) on each layer of the exhaust cover plate (2) are arranged in a staggered manner.

4. The noise reduction device for exhaust of pneumatic equipment according to claim 1, characterized in that: A rubber air bag (5) designed to conform to the lower chamber (102) is arranged in the lower chamber (102).

5. The noise reduction device for exhaust of pneumatic equipment according to claim 1, characterized in that: The partition plate (3) is provided with a slide groove (302), and the exhaust valve plate (4) is slidably arranged in the slide groove (302); A push rod (401) is fixedly connected to the exhaust valve plate (4), and the push rod (401) extends outwardly, penetrates the wall of the outer cylinder (1), and is exposed on the outer wall of the outer cylinder (1).

6. The noise reduction device for exhaust of pneumatic equipment according to claim 5, characterized in that: A rubber handle (402) is fixed to the rear end of the push rod (401).

7. The noise reduction device for exhaust of pneumatic equipment according to claim 5, characterized in that: The partition board (3) is arranged horizontally.

8. The noise reduction device for exhaust of pneumatic equipment according to claim 1, characterized in that: The air inlet (103) is connected to an air inlet pipe (6), and an air inlet check valve (7) is provided on the air inlet pipe (6).

9. The noise reduction device for exhaust of pneumatic equipment according to claim 1, characterized in that: The air inlet (103) is arranged at the bottom of the side wall of the outer cylinder (1).

10. The noise reduction device for exhaust of pneumatic equipment according to claim 1, characterized in that: The outer cylinder (1) is a stainless steel cylinder, and the exhaust cover plate (2) is a stainless steel plate.

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