Vacuum generator

Abstract

The utility model provides a vacuum generator which is characterized in that the vacuum generator comprises a shell, one side of the shell is a protective cover, a first connecting plate is fixed at the protective cover, the other side of the shell is an air outlet cover, and a sealing gasket is fixed at the air outlet cover; the pressure reducing valve is arranged on the first connecting plate, the protective cover covers the pressure reducing valve, and the outlet end of the pressure reducing valve is connected with a gas conveying area; one end of the vacuum mechanism is connected to the upper half part of the first connecting plate and communicates with the gas conveying area, and the other end of the vacuum mechanism is connected with the upper half part of the sealing gasket; the shell is divided into an upper half vacuum area and a lower half air outlet area through a first partition plate, a second partition plate is arranged in the air outlet area, mute cotton is arranged between the first partition plate and the second partition plate, and an air outlet channel is formed by the second partition plate and the bottom of the shell. Noise is greatly reduced by arranging mute cotton in the air outlet area below the vacuum mechanism.

Description

Technical Field

[0001] The utility model relates to a vacuum generator. Background Art

[0002] A vacuum generator is a new type, efficient, clean, economical and small vacuum component that uses a positive pressure air source to generate negative pressure. This makes it very easy and convenient to obtain negative pressure where there is compressed air or where both positive and negative pressures are required in a pneumatic system.

[0003] Vacuum generators are widely used in the fields of machinery, electronics, packaging, printing, plastics and robots in industrial automation.

[0004] However, since the working principle of the existing vacuum generator is that air flow at a certain pressure generates a siphon effect through a nozzle to generate negative pressure, the nozzle has to exhaust air outward all the time during this process, but the noise is still very large, generally reaching 75 - 90 decibels. Prolonged exposure to this environment will cause damage to the human body, and currently, the existing vacuum generators have a relatively large air consumption and a low energy efficiency conversion. Content of the Utility Model

[0005] The purpose of the utility model is to address the above problems existing in the prior art and propose a vacuum generator that greatly reduces noise and improves the performance of the vacuum generator by providing sound-absorbing cotton in the air outlet area below the vacuum mechanism.

[0006] The purpose of the utility model can be achieved by the following technical solutions: A vacuum generator, characterized in that it comprises:

[0007] A housing, one side of the housing is a protective cover and a first connecting plate is fixed there, and the other side is an air outlet cover and a sealing gasket is fixed there;

[0008] A pressure reducing valve, the pressure reducing valve is arranged on the first connecting plate and the protective cover covers the pressure reducing valve, and the outlet end of the pressure reducing valve is connected to a gas delivery area;

[0009] A vacuum mechanism, one end of the vacuum mechanism is connected to the upper half of the first connecting plate and communicates with the gas delivery area, and the other end of the vacuum mechanism is connected to the upper half of the sealing gasket;

[0010] The housing is divided into an upper half vacuum area and a lower half air outlet area by a first partition board. The air outlet area has a second partition board. There is sound-absorbing cotton between the first partition board and the second partition board, and an air outlet channel is formed between the second partition board and the bottom of the housing.

[0011] Furthermore, the vacuum mechanism includes a ventilation box, a number of vacuum tube assemblies, a second connecting plate, a number of pipe plugs, and a mounting frame. The ventilation box is fixedly connected to the first connecting plate and communicates with the gas delivery area. One end of the vacuum tube assembly and the pipe plug are connected to the ventilation box. The second connecting plate is connected to the ventilation box through a connecting rod. The mounting frame is installed on one side of the second connecting plate. The ventilation box, the second connecting plate, and the mounting frame form a bracket for installing the vacuum tube assembly and the pipe plug.

[0012] Furthermore, the vacuum tube assembly and the pipe plug are installed in the bracket. One end of the vacuum tube assembly is connected to the ventilation box, and the other end of the vacuum tube assembly is connected to the mounting frame. The vacuum mechanism is located in the vacuum area of the housing.

[0013] Furthermore, the vacuum tube assembly internally has an air inlet pipe, a first pipe, a second pipe, and an air outlet pipe. The air inlet pipe is installed at the inlet end of the vacuum tube assembly. The air outlet pipe is installed at the outlet end of the vacuum tube assembly. The first pipe is installed in the vacuum tube assembly near the air inlet pipe. The second pipe is installed in the vacuum tube assembly near the air outlet pipe. There is a certain distance between the middle of the first pipe and the second pipe, between the air outlet pipe and the second pipe, and between the air inlet pipe and the first pipe, and negative pressure holes are provided on the surface of the vacuum tube assembly at the above distances.

[0014] Furthermore, the outlet diameter of the air inlet pipe is smaller than that of the first pipe, the diameter of the first pipe is smaller than that of the second pipe, and the diameter of the second pipe is smaller than the inlet end of the air outlet pipe.

[0015] Furthermore, the lower half of the air outlet cover is provided with an air outlet nozzle, and the air outlet nozzle communicates with the air outlet channel.

[0016] Furthermore, sealing rings are provided at the connections between the housing and the protective cover, the air outlet cover, and the suction chuck.

[0017] Furthermore, the vacuum tube assembly and the pipe plug are arranged in a matrix in the bracket.

[0018] Compared with the prior art, the advantages of the present application are as follows:

[0019] 1. By arranging sound-absorbing cotton in the air outlet area below the vacuum mechanism, the noise is greatly reduced.

[0020] 2. Different numbers of vacuum tube assemblies are set according to requirements to accelerate the generation of negative pressure, thereby accelerating the efficiency of vacuum pumping. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of a vacuum generator;

[0022] Figure 2 It is an exploded schematic diagram of a vacuum generator

[0023] Figure 3 It is a schematic diagram of a vacuum tube assembly;

[0024] Figure 4 It is a cross-sectional view of the vacuum tube assembly;

[0025] Figure 5 It is a cross-sectional view of the outer shell

[0026] In the figure, 1 is the outer shell; 11 is the suction chuck; 111 is the sealing ring; 12 is the vacuum area; 121 is the first partition; 13 is the air outlet area; 131 is the second partition; 2 is the protective cover; 22 is the pressure reducing valve; 23 is the gas delivery area; 24 is the first connecting plate; 3 is the air outlet cover; 31 is the air outlet nozzle; 32 is the sound-absorbing cotton; 34 is the sealing gasket; 4 is the vacuum tube assembly; 401 is the air outlet pipe; 402 is the second pipe; 403 is the first pipe; 404 is the air inlet pipe; 41 is the negative pressure hole; 42 is the ventilation box; 43 is the second connecting plate; 44 is the installation frame; 45 is the blocked pipe; 46 is the connecting rod. Specific implementation mode

[0027] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention will be further described.

[0028] As Figures 1-5 shown, a vacuum generator, characterized in that it comprises:

[0029] An outer shell 1, one side of the outer shell 1 is a protective cover 2 and a first connecting plate 24 is fixed there, and the other side is an air outlet cover 3 and a sealing gasket 34 is fixed there;

[0030] A pressure reducing valve 22, the pressure reducing valve 22 is arranged on the first connecting plate 24 and the protective cover 2 is covered on the pressure reducing valve 22, and the outlet end of the pressure reducing valve 22 is connected to a gas delivery area 23;

[0031] A vacuum mechanism, one end of the vacuum mechanism is connected to the upper half of the first connecting plate 24 and is communicated with the gas delivery area 23, and the other end of the vacuum mechanism is connected to the upper half of the sealing gasket 34;

[0032] The outer shell 1 is divided into an upper half vacuum area 12 and a lower half air outlet area 13 by a first partition 121. There is a second partition 131 in the air outlet area 13. There is sound-absorbing cotton 32 between the first partition 121 and the second partition 131. An air outlet channel is formed between the second partition 131 and the bottom of the outer shell 1. The gas flow direction is successively the gas delivery area 23, the vacuum tube assembly 4. Because the air outlet area 13 is divided into two channels by the second partition 131 (the channel between the first partition 121 and the second partition 131 is the sound-absorbing channel, and the channel below the second partition 131 is the air outlet channel), the gas flows out from the vacuum tube assembly 4 and first passes through the sound-absorbing channel with the sound-absorbing cotton 32 placed and then passes through the air outlet channel to be sent out through the air outlet nozzle 31.

[0033] Further, the vacuum mechanism includes a ventilation box 42, a number of vacuum tube assemblies 4, a second connecting plate 43, a number of pipe plugs 45, and a mounting frame 44. The ventilation box 42 is fixedly connected to the first connecting plate 24 and communicates with the gas delivery area 23. One end of the vacuum tube assembly 4 and the pipe plug 45 are connected to the ventilation box 42. The second connecting plate 43 is connected to the ventilation box 42 through a connecting rod 46. The mounting frame 44 is installed on one side of the second connecting plate 43. The ventilation box 42, the second connecting plate 43, and the mounting frame 44 form a bracket for installing the vacuum tube assembly 4 and the pipe plug 45. The ventilation box 42 has a number of air outlets for connecting the vacuum tube assembly 4 or the pipe plug 45, specifically 16, and more can be set according to requirements.

[0034] Further, the vacuum tube assembly 4 and the pipe plug 45 are installed in the bracket. One end of the vacuum tube assembly 4 is connected to the ventilation box 42, and the other end of the vacuum tube assembly 4 is connected to the mounting frame 44. The vacuum mechanism is located in the vacuum area 12 of the housing 1.

[0035] Further, the vacuum tube assembly 4 and the pipe plug 45 are arranged in a matrix in the bracket. The number of the vacuum tube assemblies 4 can be installed according to actual requirements, and the unmounted parts are blocked by the pipe plug 45 to block the air outlets of the ventilation box 42.

[0036] Further, the vacuum tube assembly 4 internally has an air inlet pipe 404, a first pipe 403, a second pipe, and an air outlet pipe 401. The air inlet pipe 404 is installed at the inlet end of the vacuum tube assembly 4. The air outlet pipe 401 is installed at the outlet end of the vacuum tube assembly 4. The first pipe 403 is installed in the vacuum tube assembly 4 near the air inlet pipe 404. The second pipe 402 is installed in the vacuum tube assembly 4 near the air outlet pipe 401. There are certain intervals between the middle of the first pipe 403 and the second pipe 402, between the air outlet pipe 401 and the second pipe 402, and between the air inlet pipe 404 and the first pipe 403, and negative pressure holes 41 are opened on the surface of the vacuum tube assembly 4 at the above intervals.

[0037] Further, the outlet diameter of the air inlet pipe 404 is smaller than that of the first pipe 403. The diameter of the first pipe 403 is smaller than that of the second pipe 402. The diameter of the second pipe 402 is smaller than the inlet end of the air outlet pipe 401. The diameters of the gas outlet pipelines are all smaller than those of the gas inlet pipelines, ensuring that the gas enters the subsequent pipelines. Cooperating with the negative pressure holes 41, negative pressure can be generated according to the flow velocity and pressure of the gas, so as to generate a vacuum in the vacuum area 12, and then vacuum is pumped through the suction chuck 11.

[0038] Further, the lower half of the air outlet cover 3 is provided with an air outlet nozzle 31, and the air outlet nozzle 31 communicates with the air outlet channel.

[0039] Furthermore, sealing rings 111 are provided at the joints of the outer shell 1 with the protective cover 2, the air outlet cover 3, and the suction chuck 11. The sealing rings 111 ensure the tightness of each connection part and prevent the vacuum generator from failing.

[0040] In the present utility model, the pressure is adjusted by the pressure reducing valve 22, thereby changing the flow rate of the gas, so that the gas is transported to the vacuum tube assembly 4 through the gas transport area 23. When air passes through the vacuum tube assembly 4, the air flow rate inside the vacuum tube assembly 4 becomes faster, and the negative pressure holes 41 of the vacuum tube assembly 4 will generate negative pressure to evacuate the vacuum area 12 of the outer shell 1. The suction chuck 11 is connected to an external device to perform a vacuuming operation. The air is sent out from the outlet end of the vacuum tube assembly 4, passes downward through the sound-absorbing cotton 32 and the second partition 131, and then passes downward through the air outlet channel and is sent out from the air outlet nozzle 31. The air outlet nozzle 31 can also be connected to an external circulation device.

[0041] The overall structure of the vacuum generator of the present application is designed to be compact and small, facilitating installation on external devices. By providing a plurality of vacuum tube assemblies 4 and coordinating with the setting of the pressure reducing valve 22, the characteristics of high vacuum degree and high fidelity are achieved.

[0042] At the same time, different specifications of vacuum generators can be obtained by simply adding or reducing the number of vacuum tube assemblies 4. The vacuum generator of the present application is convenient to assemble and the vacuum tube assemblies 4 are convenient to replace after being damaged.

[0043] For the above technical solutions of the present utility model, in view of the technical problem that the prior art solutions are too single, a solution significantly different from the prior art is provided. The parts not involved in the technical solutions of the present application are the same as or can be implemented by the prior art, and will not be elaborated here.

[0044] The technical solutions in the above embodiments have clearly and completely described the content of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Claims

1. A vacuum generator, characterized in that it include: A housing, wherein one side of the housing is a protective cover to which a first connecting plate is fixed, and the other side is an air outlet cover to which a sealing gasket is fixed; A pressure reducing valve, wherein the pressure reducing valve is arranged on the first connecting plate and the protective cover is arranged on the pressure reducing valve, and an outlet end of the pressure reducing valve is connected to a gas delivery area; A vacuum mechanism, one end of which is connected to the upper half of the first connecting plate and communicates with the gas delivery area, and the other end of which is connected to the upper half of the sealing gasket; The shell is divided into an upper vacuum zone and a lower air outlet zone by a first partition. The air outlet zone is provided with a second partition. Sound-absorbing cotton is provided between the first partition and the second partition. The second partition and the bottom of the shell form an air outlet channel.

2. A vacuum generator according to claim 1, characterized in that: The vacuum mechanism includes a ventilation box, a plurality of vacuum tube assemblies, a second connecting plate, a plurality of blocking tubes and an installation frame. The ventilation box is fixedly connected to the first connecting plate and is communicated with the gas delivery area. One end of the vacuum tube assembly and the blocking tube are connected to the ventilation box. The second connecting plate and the ventilation box are connected by a connecting rod. The installation frame is installed on one side of the second connecting plate. The ventilation box, the second connecting plate and the installation frame form a bracket for installing the vacuum tube assembly and the blocking tube.

3. A vacuum generator according to claim 2, characterized in that: The vacuum tube assembly and the blocking tube are installed in the bracket, one end of the vacuum tube assembly is connected to the ventilation box, and the other end of the vacuum tube assembly is connected to the installation frame. The vacuum mechanism is located in the vacuum area of ​​the shell.

4. A vacuum generator according to claim 2, characterized in that: The vacuum tube assembly comprises an air inlet pipe, a first pipe, a second pipe and an air outlet pipe, wherein the air inlet pipe is installed at the inlet end of the vacuum tube assembly, and the air outlet pipe is installed at the outlet end of the vacuum tube assembly. The first pipe is installed in the vacuum tube assembly near the air inlet pipe, and the second pipe is installed in the vacuum tube assembly near the air outlet pipe. There is a certain distance between the first pipe and the second pipe middle piece, between the air outlet pipe and the second pipe, and between the air inlet pipe and the first pipe, and negative pressure holes are opened on the surface of the vacuum tube assembly at the above-mentioned distances.

5. A vacuum generator according to claim 4, characterized in that: The outlet diameter of the air inlet pipe is smaller than that of the first pipe, the diameter of the first pipe is smaller than that of the second pipe, and the diameter of the second pipe is smaller than that of the inlet end of the air outlet pipe.

6. A vacuum generator according to claim 1, characterized in that: The lower half of the air outlet cover is provided with an air outlet nozzle, and the air outlet nozzle is communicated with the air outlet channel.

7. A vacuum generator according to claim 1, characterized in that: Sealing rings are provided at the connections between the shell and the protective cover, the air outlet cover and the suction port chuck.

8. A vacuum generator according to claim 3, characterized in that: The vacuum tube components and the plugging tubes are arranged in a matrix in the bracket.

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