Low-noise vacuum pump

Abstract

The utility model belongs to the technical field of vacuum pumps, and particularly relates to a low-noise vacuum pump which comprises a shell, a motor is fixedly installed on one side of the shell, the output end of the motor extends into the shell, an eccentric wheel is arranged at the output end of the motor, a transmission part is arranged in the shell, and a diaphragm insert is arranged at the top of the transmission part. A valve plate is arranged at the top of the outer shell, a diaphragm, an air inlet valve and an air outlet valve are arranged in the valve plate, the top of the diaphragm insert is embedded in the center of the bottom of the diaphragm, a cavity is formed between the outer shell and the valve plate, and the cavity in the bottom of the valve plate is in an arc shape matched with the diaphragm insert. And when gas is exhausted through the gas outlet valve, the gas enters the silencing pipe, the gas is dispersed through irregular meshes in the silencing cotton, and the flow direction of the gas is changed, so that the noise reduction effect is achieved, and the harm of noise to the body of a worker during working is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to a low-noise vacuum pump. Background Art

[0002] A vacuum pump is a device or equipment that uses mechanical, physical, chemical or physicochemical methods to evacuate the container to obtain a vacuum. Generally speaking, a vacuum pump is a device that uses various methods to improve, generate and maintain a vacuum in a closed space. According to the working principle of the vacuum pump, vacuum pumps can basically be divided into two types, namely gas capture pumps and gas transmission pumps, which are widely used in metallurgy, chemical industry, food, electronic coating and other industries.

[0003] The existing technology has the following shortcomings:

[0004] During daily use, the existing vacuum pump will generate a lot of noise at the exhaust port, which will affect the surrounding environment and workers, causing workers to work in a noisy environment for a long time, which is easy to cause harm to the body, especially serious impact on hearing. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a low-noise vacuum pump to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-noise vacuum pump, comprising a shell, a motor is fixedly mounted on one side of the shell, the output end of the motor extends to the interior of the shell, an eccentric wheel is arranged on the output end of the motor, a transmission member is arranged inside the shell, a diaphragm insert is arranged on the top of the transmission member, a valve plate is arranged on the top of the shell, a diaphragm and an air inlet valve and an air outlet valve are arranged inside the valve plate, and the top of the diaphragm insert is embedded in the bottom center of the diaphragm.

[0007] As a preferred technical solution of the utility model, a cavity is provided between the housing and the valve plate, and the bottom cavity of the valve plate is an arc-shaped arrangement adapted to the diaphragm insert.

[0008] As a preferred technical solution of the utility model, a groove is provided at the bottom edge of the cavity, and a convex ring matched with the groove is provided at the bottom edge of the diaphragm.

[0009] As a preferred technical solution of the utility model, a bearing is clamped on the inner side of the transmission member, and the inner surface of the bearing is connected to the outer side of the eccentric wheel.

[0010] As a preferred technical solution of the utility model, the air inlet valve and the air outlet valve are respectively arranged above the diaphragm, and a silencer pipe is threadedly installed on the outer side of the valve plate at a position corresponding to the air outlet valve.

[0011] As a preferred technical solution of the utility model, silencer cotton is fixedly installed inside the silencer pipe, and the interior of the silencer cotton is arranged with irregular mesh holes. A seal is clamped at one end of the silencer pipe away from the valve plate, and a sealing ring is arranged between the seal and the silencer pipe, and an air outlet pipe is arranged on the sealing ring.

[0012] As a preferred technical solution of the utility model, a cover plate is fixedly installed on the side of the housing away from the motor by bolts.

[0013] Compared with the prior art, the utility model provides a low-noise vacuum pump with the following beneficial effects:

[0014] The low-noise vacuum pump, when the gas is discharged through the outlet valve, the gas enters the interior of the silencer pipe, and is dispersed through the irregular mesh holes inside the silencer cotton, and the flow direction of the gas is changed, thereby achieving the effect of noise reduction, reducing the harm of noise to the body of workers when they are working. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the exploded structure of the silencer pipe of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the sound-absorbing cotton of the utility model;

[0019] Figure 5 It is a schematic diagram of the exploded structure of the utility model.

[0020] In the figure: 1. casing; 2. motor; 3. eccentric wheel; 4. transmission part; 5. bearing; 6. valve plate; 7. cavity; 8. diaphragm insert; 9. diaphragm; 10. inlet valve; 11. outlet valve; 12. silencer pipe; 13. silencer cotton; 14. seal; 15. sealing ring; 16. cover plate; 17. groove; 18. convex ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-5 In this embodiment: a low-noise vacuum pump comprises a shell 1, a motor 2 is fixedly mounted on one side of the shell 1, an output end of the motor 2 extends to the inside of the shell 1, an eccentric wheel 3 is arranged on the output end of the motor 2, a transmission member 4 is arranged inside the shell 1, a diaphragm insert 8 is arranged on the top of the transmission member 4, a valve plate 6 is arranged on the top of the shell 1, a diaphragm 9 and an air inlet valve 10 and an air outlet valve 11 are arranged inside the valve plate 6, and the top of the diaphragm insert 8 is embedded in the bottom center of the diaphragm 9.

[0023] In this embodiment, a cavity 7 is provided between the housing 1 and the valve plate 6, and the bottom cavity 7 of the valve plate 6 is an arc-shaped setting adapted to the diaphragm insert 8. When the diaphragm insert 8 is squeezed upward, the cavity 7 can fit well with the diaphragm insert 8.

[0024] In this embodiment, a groove 17 is provided at the bottom edge of the cavity 7, and a convex ring 18 adapted to the groove 17 is provided at the bottom edge of the diaphragm 9. By providing the groove 17 and the convex ring 18, a seal can be formed between the cavity 7 and the diaphragm 9 to prevent leakage.

[0025] In this embodiment, a bearing 5 is clamped on the inner side of the transmission member 4, and the inner surface of the bearing 5 is connected to the outer side of the eccentric wheel 3. The eccentric wheel 3 is driven to rotate by starting the motor 2, and the bearing 5 is rotated. The transmission member 4 is moved up and down by the setting of the eccentric wheel 3, thereby driving the diaphragm 9 to deform.

[0026] In this embodiment, the air inlet valve 10 and the air outlet valve 11 are respectively arranged above the diaphragm 9 , and a silencer pipe 12 is threadedly installed on the outer side of the valve plate 6 at a position corresponding to the air outlet valve 11 .

[0027] In this embodiment, a silencer 13 is fixedly installed inside the silencer pipe 12, and the interior of the silencer cotton 13 is arranged with an irregular mesh. A seal 14 is clamped at the end of the silencer pipe 12 away from the valve plate 6, and a sealing ring 15 is arranged between the seal 14 and the silencer pipe 12. The sealing ring 15 is provided with an outlet pipe. When the gas is discharged through the outlet valve 11, the gas enters the interior of the silencer pipe 12, and is dispersed by the irregular mesh inside the silencer cotton 13, and the flow direction of the gas is changed, thereby achieving the effect of noise reduction, which reduces the harm of noise to the body of the staff when they are working.

[0028] In this embodiment, a cover plate 16 is fixedly mounted on a side of the housing 1 away from the motor 2 by bolts, and the cover plate 16 can be easily disassembled by the bolts, so that it is convenient to replace or repair it when the inside is damaged.

[0029] The working principle and use process of the utility model are as follows: when in use, the eccentric wheel 3 is driven to rotate by starting the motor 2, and the bearing 5 is rotated, and the transmission member 4 is moved up and down by the eccentric wheel 3, and the diaphragm 9 is driven by the diaphragm insert 8 to inhale and exhale. The gas is discharged through the outlet valve 11 as the diaphragm 9 is deformed, and the gas enters the interior of the silencer pipe 12, and is dispersed through the irregular mesh holes inside the silencer cotton 13, and the flow direction of the gas is changed, thereby achieving the effect of noise reduction, so that the staff can reduce the harm of noise to the body when working.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A low-noise vacuum pump, comprising a housing (1), a motor (2) fixedly mounted on one side of the housing (1), an output end of the motor (2) extending into the interior of the housing (1), an eccentric wheel (3) being arranged on the output end of the motor (2), characterized in that: A transmission member (4) is arranged inside the housing (1), a diaphragm insert (8) is arranged on the top of the transmission member (4), a valve plate (6) is arranged on the top of the housing (1), a diaphragm (9) and an air inlet valve (10) and an air outlet valve (11) are arranged inside the valve plate (6), and the top of the diaphragm insert (8) is embedded in the bottom center of the diaphragm (9).

2. A low noise vacuum pump according to claim 1, characterized in that: A cavity (7) is provided between the housing (1) and the valve plate (6), and the bottom cavity (7) of the valve plate (6) is in an arc shape that matches the diaphragm insert (8).

3. A low noise vacuum pump according to claim 2, characterized in that: A groove (17) is provided at the bottom edge of the cavity (7), and a convex ring (18) adapted to the groove (17) is provided at the bottom edge of the diaphragm (9).

4. A low noise vacuum pump according to claim 1, characterized in that: A bearing (5) is clamped on the inner side of the transmission member (4), and the inner surface of the bearing (5) is connected to the outer side of the eccentric wheel (3).

5. A low noise vacuum pump according to claim 1, characterized in that: The air inlet valve (10) and the air outlet valve (11) are respectively arranged above the diaphragm (9), and a silencer pipe (12) is threadedly mounted on the outer side of the valve plate (6) at a position corresponding to the air outlet valve (11).

6. A low noise vacuum pump according to claim 5, characterized in that: A silencer cotton (13) is fixedly installed inside the silencer pipe (12), and the inside of the silencer cotton (13) is arranged with irregular mesh holes. A sealing member (14) is clamped at one end of the silencer pipe (12) away from the valve plate (6), and a sealing ring (15) is arranged between the sealing member (14) and the silencer pipe (12), and an air outlet pipe is arranged on the sealing ring (15).

7. A low noise vacuum pump according to claim 1, characterized in that: A cover plate (16) is fixedly mounted on the side of the housing (1) away from the motor (2) by means of bolts.

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