Low-noise air flow channel and noise reduction structure of pneumatic tool

Abstract

The utility model discloses a pneumatic tool low noise air flow channel and noise reduction structure, relates to the pneumatic tool noise reduction technical field, and comprises a pneumatic wrench and a noise reduction pipe communicated with the pneumatic wrench air inlet, the noise reduction pipe comprises an air inlet end, a buffer section, a diversion section and an air outlet section, the air inlet end, the buffer section, the diversion section and the air outlet section are welded and fixed, a spiral air inlet groove is formed in the inner wall of the air inlet end, a plurality of conical protrusions which are symmetrically arranged in a surrounding mode are fixedly arranged on the inner wall of the buffering section, a plurality of flow guide blades which are arranged at intervals are fixedly arranged in the flow guide section, the flow guide blades are arranged in an arc shape, and the air outlet section is of a gradually-shrinking structure. According to the noise reduction pipe, the air inlet end, the buffering section, the flow guide section and the air outlet section are arranged, a special flow channel structure can be adopted to effectively reduce noise of airflow entering the pneumatic tool, and damage of noise to hearing and physical and psychological health of operators is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction of pneumatic tools, in particular to a low-noise air flow channel and a noise reduction structure of a pneumatic tool. Background Art

[0002] Pneumatic tools are widely used in industrial production and daily life, such as pneumatic wrenches and pneumatic drills.

[0003] However, when pneumatic tools are working, the high-speed flow of air in the flow channel often produces a lot of noise. The flow channel design of traditional pneumatic tools is simple and the noise control effect is poor. This will not only damage the operator's hearing, but also may affect the operator's physical and mental health if they are in a high-noise environment for a long time. At the same time, it will also cause noise pollution to the working environment.

[0004] Therefore, it is necessary to design a new type of low-noise air flow channel and noise reduction structure to solve the above problems. Utility Model Content

[0005] In view of the above problems existing in the low-noise air flow passage and noise reduction structure of existing pneumatic tools, the present utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a low-noise air flow channel and noise reduction structure for pneumatic tools, which solves the problem that the flow channel design of traditional pneumatic tools is simple and the noise control effect is poor, which not only damages the operator's hearing, but also may affect the operator's physical and mental health if in a high-noise environment for a long time.

[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0008] A low-noise air flow channel and noise reduction structure for a pneumatic tool, comprising a pneumatic wrench and a noise reduction pipe connected to an air inlet of the pneumatic wrench, wherein the noise reduction pipe comprises an air inlet end, a buffer section, a guide section, and an air outlet section, and the air inlet end, the buffer section, the guide section, and the air outlet section are welded and fixed;

[0009] A spiral air inlet groove is provided on the inner wall of the air inlet end, a plurality of conical protrusions are fixedly provided on the inner wall of the buffer section and are symmetrically arranged around the inner wall, a plurality of guide blades are fixedly provided inside the guide section and are arranged in an arc shape, and the air outlet section is a tapered structure.

[0010] Preferably, the air inlet end is arranged in a bell-shaped manner, and the expanded end is close to the pneumatic wrench.

[0011] Preferably, a plurality of guide holes arranged at intervals are formed inside the plurality of guide blades.

[0012] Preferably, two adjacent guide blades are symmetrically staggered.

[0013] Furthermore, the outer sleeve of the noise reduction pipe is provided with two symmetrically arranged noise reduction cotton sleeves, and the noise reduction cotton sleeves are similar in appearance to the noise reduction pipe.

[0014] Preferably, the two noise reduction cotton sleeves are each provided with a groove on one side away from each other, the groove is threaded with a mounting bolt, and the threaded end of the mounting bolt is threadedly arranged in the noise reduction pipe.

[0015] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0016] 1. The utility model, through the noise reduction pipe, air inlet end, buffer section, guide section and air outlet section, can adopt a special flow channel structure to effectively reduce the noise of the airflow entering the pneumatic tool, thereby reducing the damage of noise to the operator's hearing and physical and mental health.

[0017] 2. The utility model is provided with a noise reduction pipe, a noise reduction cotton sleeve, a groove and a mounting bolt, and a noise reduction component is provided on the outer side of the noise reduction flow channel as a whole, which can further improve the gas flow noise reduction effect when the pneumatic tool is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 This is an internal cross-sectional view of the noise reduction pipe of the present utility model;

[0021] Figure 3 For the utility model Figure 2 A magnified schematic diagram of part A;

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the guide plate of the present utility model.

[0023] Description of reference numerals:

[0024] 1. Pneumatic wrench; 2. Noise reduction pipe; 3. Air inlet end; 4. Buffer section; 5. Guide section; 6. Air outlet section; 7. Spiral air inlet groove; 8. Conical protrusion; 9. Guide vane; 10. Guide hole; 11. Noise reduction cotton sleeve; 12. Groove; 13. Mounting bolts. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] The embodiment of the utility model discloses a low-noise air flow channel and a noise reduction structure for a pneumatic tool.

[0027] Example 1

[0028] The utility model provides Figure 1-4 The low-noise air flow channel and noise reduction structure of a pneumatic tool shown in the figure includes a pneumatic wrench 1 and a noise reduction pipe 2 connected to the air inlet of the pneumatic wrench 1. The noise reduction pipe 2 includes an air inlet end 3, a buffer section 4, a guide section 5, and an air outlet section 6. The air inlet end 3 is arranged in a bell-shaped manner, and the expanded end is close to the pneumatic wrench 1. The air inlet end 3, the buffer section 4, the guide section 5, and the air outlet section 6 are welded and fixed;

[0029] A spiral air inlet groove 7 is provided on the inner wall of the air inlet end 3, a plurality of conical protrusions 8 are fixedly provided on the inner wall of the buffer section 4 and are symmetrically arranged around the inner wall, a plurality of guide blades 9 are fixedly provided inside the guide section 5 and are arranged symmetrically and staggeredly, a plurality of guide holes 10 are provided inside the plurality of guide blades 9 and are arranged in an arc shape, and the air outlet section 6 is a tapered structure.

[0030] When the pneumatic tool is working, air enters from the bell mouth of the air inlet section 3, and under the action of the spiral air inlet groove 7, a spiral flow is initially formed and enters the buffer section 4. In the buffer section 4, the air flow rate is reduced due to the expansion of the space and the action of the conical protrusion 8, and a vortex is formed, and the energy is converted into heat energy. Then the air enters the guide section 5, and is combed into laminar flow under the action of the guide plate 9 and the guide hole 10. Finally, it enters the working chamber of the pneumatic tool after the sound absorption treatment of the air outlet section 6. At this time, the airflow entering the inside of the pneumatic tool is effectively noise-reduced.

[0031] Example 2

[0032] Example 2 is based on Example 1 to further improve the gas flow noise reduction effect when the pneumatic tool is used. Figure 2-3 As shown, the outer sleeve of the noise reduction pipe 2 is provided with two symmetrically arranged noise reduction cotton sleeves 11. The noise reduction cotton sleeves 11 are similar in appearance to the noise reduction pipe 2. A groove 12 is provided on the side away from the two noise reduction cotton sleeves 11. The groove 12 is threaded with a mounting bolt 13, and the threaded end of the mounting bolt 13 is threaded in the noise reduction pipe 2.

[0033] After the noise reduction tube 2 is set, two noise reduction cotton sleeves 11 can be set on the outside of the noise reduction tube 2, and with the setting of the mounting bolts 13, the two noise reduction cotton sleeves 11 can be stably installed on the outside of the noise reduction tube 2. At this time, when the internal flow channel structure of the noise reduction tube 2 reduces the flow noise of the gas, with the setting of the noise reduction cotton sleeves 11, the noise cannot flow outward through the noise reduction tube 2, thereby further improving the noise reduction effect when the pneumatic tool is used.

[0034] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A low-noise air flow channel and noise reduction structure for pneumatic tools, comprising a pneumatic wrench (1) and a noise reduction pipe (2) connected to an air inlet of the pneumatic wrench (1), characterized in that: The noise reduction pipe (2) comprises an air inlet end (3), a buffer section (4), a flow guide section (5) and an air outlet section (6), and the air inlet end (3), the buffer section (4), the flow guide section (5) and the air outlet section (6) are welded and fixed; The inner wall of the air inlet end (3) is provided with a spiral air inlet groove (7), the inner wall of the buffer section (4) is fixedly provided with a plurality of conical protrusions (8) arranged in a symmetrical manner around the inner wall, the interior of the guide section (5) is fixedly provided with a plurality of guide blades (9) arranged at intervals, the guide blades (9) are arranged in an arc shape, and the air outlet section (6) is a tapered structure.

2. The low-noise air flow channel and noise reduction structure for pneumatic tools according to claim 1, characterized in that: The air inlet end (3) is arranged in a bell-mouth shape, and one end of the bell-mouth is close to the pneumatic wrench (1).

3. The low-noise air flow channel and noise reduction structure for pneumatic tools according to claim 1, characterized in that: A plurality of guide holes (10) arranged at intervals are provided inside the plurality of guide blades (9).

4. The low-noise air flow channel and noise reduction structure for pneumatic tools according to claim 1, characterized in that: Two adjacent guide blades (9) are symmetrically staggered.

5. The low-noise air flow channel and noise reduction structure for pneumatic tools according to claim 1, characterized in that: The outer sleeve of the noise reduction pipe (2) is provided with two symmetrically arranged noise reduction cotton sleeves (11), and the noise reduction cotton sleeves (11) are similar in appearance to the noise reduction pipe (2).

6. The low-noise air flow channel and noise reduction structure for pneumatic tools according to claim 5, characterized in that: A groove (12) is provided on one side of the two noise reduction cotton sleeves (11) away from each other. A mounting bolt (13) is threadedly passed through the groove (12). The threaded end of the mounting bolt (13) is threadedly arranged in the noise reduction pipe (2).

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