Self-cleaning vacuum pump

Abstract

The utility model provides a kind of self-cleaning vacuum pump, comprising: vacuum pump complete machine and self-cleaning system;The self-cleaning system is arranged in vacuum pump complete machine inside;The self-cleaning system includes high-pressure nitrogen source, gas path of conveying high-pressure nitrogen, water tank and vacuum generator, the vacuum generator is connected between gas path and vacuum pump complete machine and is connected water tank by waterway;High-pressure nitrogen is extracted cleaning fluid in water tank by vacuum generator and is sprayed into vacuum pump complete machine.

Description

Technical Field

[0001] This utility model relates to a self-cleaning vacuum pump. Background Technology

[0002] Traditional dry vacuum pumps can withstand a certain amount of gas, liquid, and small particles, but in practical applications, they still suffer from prominent problems such as rotor jamming and loud noise at the outlet, especially under complex operating conditions (such as temperature fluctuations and flow rate changes), where performance degrades significantly. Existing designs lack effective pump maintenance, lack internal pump chamber cleaning, and lack effective control of outlet noise, making it difficult to adapt to varying operating conditions. Utility Model Content

[0003] The main technical problem to be solved by this utility model is to provide a vacuum pump that can clean the inside of the pump chamber.

[0004] The secondary technical problem to be solved by this utility model is to provide a vacuum pump that reduces the noise at the outlet.

[0005] To solve the above-mentioned technical problems, this utility model provides a self-cleaning vacuum pump, including: a complete vacuum pump and a self-cleaning system;

[0006] The self-cleaning system is installed inside the vacuum pump unit; the self-cleaning system includes a high-pressure nitrogen source, a gas path for delivering high-pressure nitrogen, a water tank, and a vacuum generator. The vacuum generator is connected in series between the gas path and the vacuum pump unit and is connected to the water tank through the water path; the high-pressure nitrogen draws the cleaning liquid from the water tank through the vacuum generator and is sprayed into the vacuum pump unit.

[0007] In a preferred embodiment: a flow cut-off valve is provided in the water circuit.

[0008] In a preferred embodiment: a liquid level sensor is installed inside the water tank.

[0009] In a preferred embodiment: the gas path is connected to the vacuum pump unit via a solenoid valve.

[0010] In a preferred embodiment, a silencer is also included, which is disposed outside the vacuum pump unit and is connected to the outlet of the vacuum pump unit via a one-way valve.

[0011] In a preferred embodiment: the silencer includes a housing and a silencing chamber; the housing is connected to the one-way valve and an external pipe by a chuck connector; the silencing chamber is composed of a perforated pipe at the front and a perforated baffle and a non-perforated baffle at the rear, which effectively reduces noise.

[0012] In a preferred embodiment: the perforated partition and the non-perforated partition are staggered and not equidistantly arranged, with the first non-perforated partition and the perforated partition spaced 25mm apart from bottom to top, and the distance between the second non-perforated partition and the perforated partition increasing to 35mm.

[0013] In a preferred embodiment: the water tank is fixed to the base of the vacuum pump.

[0014] In a preferred embodiment, the top of the perforated tube in the silencing cavity is sealed by a baffle.

[0015] This invention provides a self-cleaning vacuum pump. When the system stops, the pneumatic butterfly valve closes, and high-pressure nitrogen is introduced. As the nitrogen passes through the vacuum generator, it draws in a certain amount of cleaning liquid, which mixes with the pump chamber. The flow cut-off valve closes after a certain amount of liquid has passed through, and high-pressure nitrogen continues to purge the pump chamber for 10 minutes, achieving the effect of cleaning and purging. The silent system consists of a silencer and a one-way valve. The silencer comprises two parts: a housing and a silencing chamber. The housing uses a chuck connector to connect the one-way valve to the external pipeline, making disassembly and assembly convenient. The silencing chamber consists of a perforated tube at the front and a perforated and non-perforated partition at the rear, achieving highly efficient noise reduction. Attached Figure Description

[0016] Figure 1 This is a front view of the vacuum pump unit in a preferred embodiment of the present invention;

[0017] Figure 2 This is a front view of the vacuum pump unit (without door panel) in a preferred embodiment of the present invention;

[0018] Figure 3 This is a preferred embodiment of the silent system and its cross-sectional view along the AA direction; wherein, A is a front view of the silent system; B is a cross-sectional view of the silent system; and C is a perspective view of the silent system.

[0019] Figure 4 This is a schematic diagram of the self-cleaning system in a preferred embodiment of the present invention; where A is a front view and B is a side view;

[0020] The component names corresponding to the reference numerals in the attached drawings are as follows:

[0021] 1-Vacuum pump unit, 2-Silencer, 3-One-way, 4-Self-cleaning system, 21-Housing, 22-Silencer chamber, 221-Perforated baffle, 222-Non-perforated baffle, 223-Perforated pipe, 41-Pneumatic butterfly valve, 42-Flow shut-off valve, 43-Water tank, 44-Level sensor, 45-Vacuum generator, 46-Solenoid valve. Detailed Implementation

[0022] To make the technical solution and features of this utility model clearer, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific examples. It should be understood that these examples are only for illustrating this utility model and are not intended to limit the scope of this utility model. After reading this utility model, any modifications of this utility model by those skilled in the art in various equivalent forms fall within the scope defined by the appended claims.

[0023] refer to Figures 1-4 This embodiment provides a self-cleaning silent vacuum pump, including a vacuum pump unit 1, a silencer 2, a one-way valve 3, and a self-cleaning system 4.

[0024] The self-cleaning system 4 is located inside the vacuum pump unit 1 and connected to the air inlet of the vacuum pump unit 1. The air inlet of the vacuum pump unit 1 is equipped with a pneumatic butterfly valve 41. The silencer 2 and the one-way valve 3 constitute a silent system, which is placed outside the unit and connected to the air outlet of the vacuum pump unit 1.

[0025] The cleaning system 4 consists of an air path and a water path. The air path connects to an external high-pressure nitrogen source, and a vacuum generator 45 is connected in series in the air path and to the water tank 43. When the high-pressure nitrogen passes through the vacuum generator 45, the Venturi effect is generated, which draws the cleaning fluid from the water tank 43. The amount of cleaning fluid used is set by a flow cut-off valve 42 connected in series in the water path, thus ensuring that a fixed amount of cleaning fluid is injected into the pump chamber of the vacuum pump 1 each time. In this embodiment, the amount of cleaning fluid used in the self-cleaning system 4 is matched according to the size of the pump chamber; this can be achieved by adjusting the opening duration of the flow cut-off valve 42. The water tank 43 is fixed inside the base and does not occupy internal space, making the entire system operation automated.

[0026] The entire operation of the cleaning system 4 begins after the entire machine is shut down. The pneumatic butterfly valve 41 closes the air inlet of the vacuum pump 1 to prevent gas backflow. The solenoid valve 46 opens, allowing external high-pressure nitrogen to enter. After passing through the vacuum generator 45, the cleaning fluid in the water tank 43 is drawn in and sprayed into the pump chamber to clean the pump chamber and rotor. After a period of mixing and cleaning, the supply of cleaning fluid is stopped by the flow cut-off valve 42. Nitrogen continues to purge for 10 minutes for a more thorough cleaning of the pump chamber. The cleaning fluid in the water tank 43 is controlled by the liquid level sensor 44. If the liquid level is lower than the warning level, a signal will be sent to the Internet of Things to remind the user to replenish the liquid.

[0027] The silencer system is mainly activated by the silencer 2, and the one-way valve 3 ensures that there is no backflow at the outlet and no accumulation of dirt in the exhaust pipe. The silencer 2 includes a housing 21 and a silencer chamber 22, with the silencer chamber 22 passing through the housing 21. The housing 21 uses a chuck connector to connect the one-way valve to the external pipe, making disassembly and assembly convenient. The silencer chamber 22 consists of a perforated pipe 223 at the front and a perforated baffle 221 and a non-perforated baffle 222 at the rear, achieving efficient noise reduction. The perforated pipe 223 in the silencer chamber 22 evenly disperses the airflow, allowing the airflow to collide more efficiently with the baffle and eliminate "energy". The perforated baffle 221 and the non-perforated baffle 222 are staggered and not equidistant, allowing the airflow to collide more efficiently with the baffle. In the final small silencer chamber, the gas flows smoothly out of the silencer along the inner pipe, reducing surging and eliminating "energy", thus achieving the purpose of noise reduction.

[0028] In this embodiment, the top of the perforated pipe 223 in the silencing cavity 22 is sealed with a baffle, allowing the incoming gas to flow out from the pipe opening. Furthermore, the perforated baffle 221 and the non-perforated baffle 222 in the silencing cavity 22 are staggered and not equidistantly arranged. From bottom to top, the first non-perforated baffle 222 is 25mm apart from the perforated baffle 221, increasing to 35mm for the next step, and so on until the last baffle. In the last small silencing cavity, a pipe is inserted from the housing 21 into the silencing cavity pipe, extending the "air path" so that the gas can flow smoothly out of the silencer, reducing surging.

[0029] The above is only one specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A self-cleaning vacuum pump, characterized in that... include: Vacuum pump unit and self-cleaning system; The self-cleaning system is installed inside the vacuum pump unit; the self-cleaning system includes a high-pressure nitrogen source, a gas path for delivering high-pressure nitrogen, a water tank, and a vacuum generator. The vacuum generator is connected in series between the gas path and the vacuum pump unit and is connected to the water tank through the water path; the high-pressure nitrogen draws the cleaning liquid from the water tank through the vacuum generator and is sprayed into the vacuum pump unit.

2. The self-cleaning vacuum pump according to claim 1, characterized in that: The water circuit is equipped with a flow cutoff valve.

3. The self-cleaning vacuum pump according to claim 1, characterized in that: A liquid level sensor is installed inside the water tank.

4. A self-cleaning vacuum pump according to claim 1, characterized in that: The gas path is connected to the entire vacuum pump via a solenoid valve.

5. A self-cleaning vacuum pump according to claim 1, characterized in that: It also includes a silencer installed outside the vacuum pump unit, which is connected to the air outlet of the vacuum pump unit via a one-way valve.

6. A self-cleaning vacuum pump according to claim 5, characterized in that: The silencer includes a housing and a silencing chamber; the housing is connected to the one-way valve and an external pipe by a chuck connector; the silencing chamber is composed of a perforated pipe at the front and a perforated baffle and a non-perforated baffle at the rear, which effectively reduces noise.

7. A self-cleaning vacuum pump according to claim 6, characterized in that: The perforated and non-perforated partitions are staggered and not equidistant. From bottom to top, the first non-perforated partition is 25mm apart from the perforated partition, and the distance between the second non-perforated partition and the perforated partition increases to 35mm.

8. A self-cleaning vacuum pump according to claim 1, characterized in that: The water tank is fixed to the base of the vacuum pump.

9. A self-cleaning vacuum pump according to claim 6, characterized in that: The top of the perforated tube in the silencing cavity is sealed by a baffle.

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