A barrier entry vacuum pump

Abstract

The utility model discloses a kind of anti-infiltration vacuum pumps, including motor, pump body suction part and pump body exhaust part. Pump body suction part is fixed with suction part end cover to form internal chamber, and rotor with spring rotary vane is eccentrically arranged in internal chamber;Pump body exhaust part is fixed with exhaust part end cover and is provided with detachable oil-gas separator. The upper portion of pump body suction part is provided with anti-infiltration structure, and the anti-infiltration structure is provided with electromagnetic valve, droplet separator with double baffle and filter with precision filter element, which can effectively intercept liquid droplets and dust in airflow;The liquid chamber of suction part end cover is provided with a floater, which will touch the stop button of electromagnetic valve to achieve automatic shutdown when there is water in the internal chamber, and the detachable drainage seal plug can drain water. The utility model significantly improves the anti-infiltration capacity of the vacuum pump, and is suitable for vacuum extraction scene of wet and dusty gas.

Description

Technical Field

[0001] This utility model relates to a rotary vane vacuum pump, belonging to the field of vacuum pumps, and particularly to an anti-seepage vacuum pump. Background Technology

[0002] A vacuum pump is a device or equipment that uses mechanical, physical, chemical, or physicochemical methods to evacuate a container and create a vacuum. Vacuum pumps are widely used in industries such as chemical, pharmaceutical, food, and electronics. However, existing vacuum pumps generally suffer from the following technical defects during operation, especially when pumping gases containing moisture or dust: Infiltration problems: Moisture in the gas seeps into the internal chamber of the pump body, causing the lubricating oil to emulsify, which in turn damages the pump body's sealing performance and corrodes the internal parts of the pump body; dust in the gas seeps into the internal chamber, which increases the wear force on the rotor, vanes and chamber, thereby increasing the gap, reducing the sealing performance and significantly shortening the service life of the vacuum pump.

[0003] Water accumulation problem: During the operation of the pump, gas may condense and accumulate as water due to temperature and pressure changes. When there is a large amount of water in the internal chamber, the corrosion of parts will be accelerated, the motor power will increase or even overload, posing a safety hazard. Utility Model Content

[0004] To address the shortcomings of the aforementioned technologies, this invention provides an anti-permeability vacuum pump.

[0005] To solve the above technical problems, the technical solution adopted by this utility model is: a seepage-proof vacuum pump, which includes a motor, a pump body exhaust section and a pump body suction section. One end of the pump body suction section is fixed to the motor, and the other end is equipped with a suction section end cover and forms a columnar internal chamber. The pump body suction section and the pump body exhaust section are fixed by bolts. The pump body exhaust section is equipped with an exhaust section end cover and an oil-gas separator.

[0006] It also includes an anti-seepage structure, which is located on the upper part of the pump body's suction section. The anti-seepage structure includes a structural base and an air delivery pipe located inside the structural base. The structural base is equipped with a solenoid valve, a droplet separator, and a filter, and the solenoid valve, droplet separator, and filter are all connected to the air delivery pipe.

[0007] The solenoid valve is located above the intake end cover, and the solenoid valve and the intake end cover form an automatic stop structure.

[0008] Furthermore, the suction end cap is provided with a liquid chamber, the bottom of which is provided with a liquid inlet communicating with the internal chamber, and the bottom end wall of the liquid chamber is provided with a liquid outlet and a liquid outlet sealing plug is installed; the liquid chamber is also provided with a floater, which is located below the solenoid valve and the solenoid valve is provided with a stop button, and the floater can trigger the stop button under the action of buoyancy.

[0009] Furthermore, the front end of the gas pipeline is a valve connection port that is connected to a solenoid valve; the structural base is equipped with a valve mounting seat, a separator mounting groove, and a filter mounting groove.

[0010] Furthermore, the droplet separator is placed in the separator installation groove, and the front and rear ends of the droplet separator are provided with openings and connected to the gas transmission pipeline; the droplet separator is provided with a first baffle and a second baffle, and the first baffle and the second baffle are arranged alternately.

[0011] Furthermore, the filter is placed in the filter mounting slot, and the front and bottom ends of the filter are provided with openings that are connected to the gas transmission pipeline; the filter is provided with a filter element, and one end of the filter element is located in the opening at the bottom end.

[0012] Furthermore, an eccentric rotor is installed in the internal chamber of the pump body's suction section. The rotor is connected to three vanes, and a spring is installed between the rotor and the vanes. The vanes abut against the cavity wall of the internal chamber. An air intake port is provided at the upper part of the internal chamber and is connected to an air delivery pipe. A pump connection port is provided on the side of the internal chamber and is connected to an exhaust valve of the pump body's exhaust section.

[0013] Furthermore, the lower part of the pump body exhaust section is an oil tank containing vacuum pump oil, and the exhaust section end cap is installed at one end of the oil tank; the upper part of the pump body exhaust section is an exhaust chamber and is equipped with a detachable oil-gas separator.

[0014] This invention provides a seepage-proof vacuum pump, which integrates a solenoid valve, a droplet separator, and a filter into a single seepage-proof structure. The solenoid valve controls the on / off state of the entire gas path. The droplet separator has staggered first and second baffles to effectively intercept droplets in the airflow. The filter has a built-in precision filter element, and the airflow must be forced through the filter element before entering the internal chamber of the pump body, effectively intercepting dust in the airflow. Simultaneously, the internal chamber of the pump body is fixed with an end cap containing a liquid chamber. The liquid chamber is equipped with a floater. When water accumulates in the chamber, the floater rises synchronously with the water level, triggering the solenoid valve's shut-off button to cut off the gas path. This, combined with the drain port of the liquid chamber, drains the accumulated water, achieving automatic protection against water accumulation in the vacuum pump chamber. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a magnified view of a section of the automatic stopping structure.

[0017] Figure 3 This is a cross-sectional view of the internal chamber of the pump body's suction section.

[0018] Figure 4This is a partial sectional view of the intake end cap.

[0019] Figure 5 An illustration of the effect of an explosion to prevent infiltration into the structure.

[0020] Figure 6 This is a partial schematic diagram of a droplet separator.

[0021] Figure 7 This is a partial cross-sectional view of the filter.

[0022] Figure 8 This is an exploded view of the present invention.

[0023] In the diagram: 10. Pump body suction section; 11. Rotor; 12. Vane; 20. Pump body exhaust section; 30. Motor; 40. Suction section end cover; 41. Liquid chamber; 42. Liquid inlet; 43. Floater; 44. Drain sealing plug; 50. Exhaust section end cover; 60. Oil-gas separator; 70. Solenoid valve; 71. Stop button; 80. Droplet separator; 81. Baffle No. 1; 82. Baffle No. 2; 90. Filter; 91. Precision filter element; 100. Anti-seepage structure; 101. Valve mounting seat; 102. Valve connection port; 103. Separator mounting slot; 104. Filter mounting slot. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] Example 1:

[0026] This utility model discloses a seepage-proof vacuum pump, such as Figure 1 and Figure 6 As shown, it includes a motor 30, a pump body exhaust section 20, and a pump body suction section 10. The motor 30 is fixed to one end of the pump body suction section 10, and a suction section end cap 40 is installed at the other end of the pump body suction section 10, forming a cylindrical internal chamber. A rotor 11 is eccentrically positioned within the internal chamber and is connected to the motor 30. Three vanes 12 are connected to the rotor 11, and springs are provided between the vanes 12 and the rotor 11. Therefore, the vanes 12 are subjected to elastic force and always press against the wall of the internal chamber. (Reference) Figure 3As shown, the internal chamber is divided into three parts, A, B, and C, by three rotating vanes 12. Part A communicates with the air intake port located at the top of the internal chamber, and part C communicates with the pump connection port located on the side of the internal chamber. Furthermore, the pump body intake part 10 is fixed to the pump body exhaust part 20 by bolts, and the pump body exhaust part 20 is equipped with an exhaust valve at the pump connection port. The lower part of the pump body exhaust part 20 is an oil tank with an exhaust end cap 50 installed at one end. The oil tank stores vacuum pump oil for lubricating and sealing the machine body. The upper part of the pump body exhaust part 20 is an exhaust chamber, which is equipped with a detachable oil-gas separator 60.

[0027] The specific working principle of this utility model is as follows: During operation, the motor controls the rotor to move clockwise. Section A of the internal chamber connects to the air inlet and its volume gradually increases, causing the gas pressure to decrease, and gas is drawn into section A. Section A follows the vane movement until it is isolated from the air inlet, at which point section A transforms into section B. Section B is a transition section, which follows the vane movement and transforms into section C. Section C of the internal chamber connects to the pump connection port and its volume gradually decreases, causing the gas pressure to increase, and gas enters the exhaust tank of the pump body through the exhaust valve. Section C follows the vane movement until it is isolated from the pump connection port, at which point section C transforms into section A. The gas then passes through the oil layer in the oil tank and is processed by the oil-gas separator before being output. Under the action of the motor, the pump body continuously pumps air to achieve vacuum acquisition.

[0028] Example 2:

[0029] Based on the anti-seepage vacuum pump of Embodiment 1, an anti-seepage structure 100 is provided on the upper part of the pump body suction section 10, such as... Figure 5 The anti-seepage structure 100 shown includes a structural base and a gas delivery pipe disposed inside the structural base. The structural base is provided with a separator mounting groove 103, a filter mounting groove 104, and a valve mounting seat 101. The structural base is also provided with a gas delivery pipe that communicates with the suction port of the pump body's suction section 10. A solenoid valve 70 is installed at the valve mounting seat 101, and the solenoid valve 70 communicates with the valve connection port 102 of the gas delivery pipe. The valve connection port 102 is the port of the gas delivery pipe in the anti-seepage structure 100, therefore the solenoid valve 70 controls the opening and closing state of the gas delivery pipe. The droplet separator 80 is fixed in the separator mounting groove 103, see reference. Figure 6As shown, the droplet separator 80 has openings at both ends that connect to the gas supply pipe. The droplet separator 80 contains a first baffle 81 and a second baffle 82, which are staggered. Airflow entering the droplet separator 80 through the openings impacts the first baffle 81. After being diverted by the first baffle 81, the airflow impacts the second baffle 82 and then enters the rear gas supply pipe through the openings. The first baffle 81 and the second baffle 82 trap droplets in the airflow, which converge along the plates to the bottom of the droplet separator 80, thus reducing moisture penetration into the vacuum pump. The filter 90 is fixed in the filter mounting slot, as shown in the reference diagram. Figure 7 As shown, the filter 90 has openings at its front and bottom ends that connect to the gas supply pipeline. A filter element 91 is installed inside the filter 90, with one end of the filter element 91 positioned in the opening at the bottom of the filter 90. Therefore, the airflow must enter the filter element 91 and then exit from the opening at the bottom. The filter element 91 effectively intercepts particulate matter entrained in the airflow, thereby reducing dust infiltration into the vacuum pump. Furthermore, both the droplet separator 80 and the filter 90 are detachable, facilitating cleaning and maintenance by personnel to maintain the vacuum pump's anti-infiltration performance.

[0030] Preferably, a liquid chamber 41 is provided inside the suction end cap 40, and a liquid inlet 42 is provided at the bottom of the liquid chamber 41. The liquid inlet 42 communicates with the internal cavity of the pump body suction section 10, and the liquid inlet 42 is located at the bottom of the internal cavity. A float 43 is also provided in the liquid chamber 41. The float 43 includes a float ball at the bottom, the float ball is connected to a straight rod, the straight rod passes through the top of the liquid chamber 41 and is connected to a striker. It should be noted that, according to reference... Figure 2 As shown, the solenoid valve 70 is equipped with a stop button 71, which is located above the float 43. The solenoid valve 70, the liquid chamber 41 of the suction end cover 40, and the float 43 constitute an automatic stop structure. If a large amount of water condenses in the internal chamber of the pump body's suction section 10, the water will enter the liquid chamber 41 through the liquid inlet 42. The float will move upward due to the water entering the liquid chamber 41 until the block connected to it strikes the stop button 71 of the solenoid valve 70, thereby closing the gas supply pipeline and stopping the operation of the device. At this time, the operator can remove the drain sealing plug 44 installed at the bottom of the liquid chamber 41 to drain the water in the internal chamber from the drain port at the bottom of the liquid chamber 41, which can effectively prevent excessive condensation from accumulating in the internal chamber of the pump body, thus affecting the efficiency and lifespan of the vacuum pump.

[0031] In summary, the core innovation of this invention lies in its "anti-seepage + automatic water accumulation protection." The vacuum pump is equipped with an anti-seepage structure. Its droplet separator, based on staggered first and second baffles, achieves two-stage droplet separation, effectively blocking water infiltration and preventing water from emulsifying the lubricating oil and corroding the chamber and pump body. Its filter, based on a precision filter element that the airflow must pass through, effectively intercepts dust in the airflow, preventing accelerated wear of the rotor and vanes and extending the service life of the vacuum pump. Furthermore, the suction end cover is equipped with a liquid chamber connected to the internal chamber. A float inside the liquid chamber rises synchronously when water accumulates in the internal chamber. The float's impact block triggers the stop button on the solenoid valve, thereby shutting off the vacuum pump's air path and achieving automatic protection against water accumulation. This invention possesses excellent anti-seepage performance and automatic water accumulation protection, making it suitable for vacuum extraction scenarios involving gases containing moisture and dust.

[0032] The above embodiments are not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are also within the protection scope of the present utility model.

Claims

1. A leak-proof vacuum pump, characterized in that: It includes a motor (30), a pump body exhaust section (20) and a pump body suction section (10). One end of the pump body suction section (10) is fixed to the motor (30), and the other end is equipped with a suction section end cap (40) and forms a columnar internal chamber. The pump body suction section (10) and the pump body exhaust section (20) are fixed by bolts. The pump body exhaust section (20) is equipped with an exhaust section end cap (50) and an oil-gas separator (60). It also includes an anti-seepage structure, which is located on the upper part of the pump body's suction section (10), and includes a structural base and an air delivery pipe located inside the structural base; the structural base is equipped with a solenoid valve (70), a droplet separator (80) and a filter (90), and the solenoid valve (70), the droplet separator (80) and the filter (90) are all connected to the air delivery pipe; The solenoid valve (70) is located above the intake end cap (40), and the solenoid valve (70) and the intake end cap (40) form an automatic stop structure.

2. The anti-permeability vacuum pump according to claim 1, characterized in that: The end cap of the air intake section is provided with a liquid chamber (41), and the bottom of the liquid chamber (41) is provided with a liquid inlet (42) communicating with the internal chamber. The bottom wall of the liquid chamber (41) is provided with a liquid outlet and a liquid outlet sealing plug (44) is installed. The liquid chamber (41) is also provided with a floater (43). The floater (43) is located below the solenoid valve (70) and the solenoid valve is provided with a stop button (71). The floater (43) can touch the stop button (71) under the action of buoyancy.

3. The anti-permeability vacuum pump according to claim 1, characterized in that: The front end of the gas pipeline is a valve connection port (102) and the valve connection port is connected to the solenoid valve (70); the structural base is provided with a valve fixing seat (101), a separator mounting groove (103) and a filter mounting groove (104).

4. The anti-permeability vacuum pump according to claim 3, characterized in that: The droplet separator (80) is placed in the separator mounting groove (103). The front and rear ends of the droplet separator (80) are provided with openings and are connected to the gas transmission pipeline. The droplet separator (80) is provided with a first baffle (81) and a second baffle (82), and the first baffle (81) and the second baffle (82) are arranged in an alternating manner.

5. A seepage-proof vacuum pump according to claim 3, characterized in that: The filter (90) is placed in the filter mounting groove (104), and the front end and bottom end of the filter (90) are provided with openings and are connected to the gas transmission pipeline; the filter (90) is provided with a filter element (91) and one end of the filter element is located in the opening at the bottom end.

6. The anti-permeability vacuum pump according to claim 1, characterized in that: An eccentric rotor (11) is provided in the internal chamber of the pump body intake section (10). The rotor (11) is connected to three vanes (12), and a spring is provided between the rotor (11) and the vanes (12). The vanes (12) abut against the cavity wall of the internal chamber. An air intake port is provided at the upper part of the internal chamber and is connected to the air supply pipe. A pump connection port is provided on the side of the internal chamber and is connected to the exhaust valve of the pump body exhaust section (20).

7. A seepage-proof vacuum pump according to claim 3, characterized in that: The lower part of the pump body exhaust section (20) is an oil tank containing vacuum pump oil, and the exhaust section end cap (50) is installed at one end of the oil tank; the upper part of the pump body exhaust section (20) is an exhaust chamber and is equipped with a detachable oil-gas separator (60).

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