Efficient and energy-saving type multi-stage rotary vane vacuum pump

Abstract

The utility model relates to the field of rotary-vane vacuum pumps, in particular to a high-efficiency energy-saving type multi-stage rotary-vane vacuum pump. A stator is fixedly connected to the interior of the pump body; a rotor is rotatably connected to an inner cavity of the stator; an air inlet pipe is fixedly connected to the top of the pump body; and an air outlet pipe is fixedly connected to the top of the pump body. The driving motor is started to be matched with the belt, the reciprocating lead screw, the sliding block, the flow guide groove and the like to drive the scraping rod to move, pump oil attached to the lower portion of the first filter screen is scraped, and the situation that the first filter screen is blocked due to the fact that the pump oil, impurities and the like are attached to the bottom of the first filter screen, and the scraped pump oil, impurities and the like fall into the flow guide groove is avoided. And after being filtered by the second filter screen, the water flows into the pump body through the oil outlet pipe to be recycled, and after the second filter screen works for a period of time, the second filter screen is manually pulled out to be cleaned.

Description

Technical Field

[0001] The utility model relates to the field of rotary vane vacuum pumps, in particular to a high-efficiency and energy-saving multi-stage rotary vane vacuum pump. Background Art

[0002] A rotary vane vacuum pump is a rotary variable volume vacuum pump in which the eccentrically mounted rotor is tangent to the fixed surface of the stator. Two (or more) vanes slide in the rotor grooves (usually radially) and contact the inner wall of the stator, dividing the pump chamber into several variable volumes. Usually, the gap between the vane and the pump chamber is sealed with oil, so the rotary vane vacuum pump is generally an oil-sealed mechanical vacuum pump.

[0003] Since most of the multi-stage rotary vane vacuum pumps are oil-sealed pumps, the exhaust port of the multi-stage rotary vane vacuum pump is generally open, so that when the multi-stage rotary vane vacuum pump is exhausted, the gas will not only carry the pump oil and may be discharged from the exhaust port, but the pump oil may also splash out from the exhaust port during the exhaust process, thereby causing pollution to the equipment; some multi-stage rotary vane vacuum pumps may be equipped with a blowout prevention cover at the exhaust port. Although the pump oil splashes out, the pump oil on the blowout prevention cover cannot be recovered for secondary utilization, which reduces the applicability of the device. Utility Model Content

[0004] The purpose of this utility model is to solve the above shortcomings and provide a high-efficiency and energy-saving multi-stage rotary vane vacuum pump;

[0005] To achieve the above-mentioned purpose, the utility model provides a high-efficiency and energy-saving multi-stage rotary vane vacuum pump, comprising a base plate, a pump body is fixedly installed above the base plate, a stator is fixedly connected inside the pump body, a rotor is rotatably connected to the inner cavity of the stator, an air inlet pipe is fixedly connected to the top of the pump body, an air outlet pipe is fixedly connected to the top of the pump body, a No. 1 filter is fixedly installed on the top of the air outlet pipe, a scraping mechanism for removing pump oil attached to the bottom of the No. 1 filter is rotatably connected inside the air outlet pipe, a driving mechanism for driving the scraping mechanism to move is fixedly installed above the base plate, and a recovery mechanism is slidably connected inside the air outlet pipe for recycling the pump oil removed by the scraping mechanism.

[0006] As a further improvement of the present technical solution, the scraping mechanism includes a reciprocating screw rotatably connected to the inner wall of the outlet pipe, and one side of the reciprocating screw passes through the outlet pipe, a slider is screwed on the reciprocating screw, and the slider is fixedly connected to a guide groove on one side close to the central axis of the No. 1 filter, a scraper rod is fixedly connected to the bottom of the guide groove, and the top of the scraper rod is in contact with the bottom of the No. 1 filter.

[0007] As a further improvement of the present technical solution, the driving mechanism includes a driving motor fixedly mounted above the base plate, the output end of the driving motor passes through the pump body and is fixedly connected to one side of the rotor, a belt is sleeved on the outer wall of the output end of the driving motor located outside the pump body, and the side of the belt away from the driving motor is sleeved on the reciprocating screw.

[0008] As a further improvement of the present technical solution, the recovery mechanism includes a No. 2 filter screen slidably connected to the inner wall of the outlet pipe, a recovery groove is provided on the inner wall of the outlet pipe, and the No. 2 filter screen is slidably connected to the recovery groove, the guide groove extends to the inside of the recovery groove on one side close to the recovery groove, and an oil outlet pipe is provided at the bottom of the recovery groove.

[0009] As a further improvement of the technical solution, a No. 3 filter is placed on the top of the air inlet pipe, a No. 1 bolt is connected between the No. 3 filter and the air inlet pipe, and a No. 2 bolt is connected between the No. 1 filter and the air outlet pipe.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] In the high-efficiency and energy-saving multi-stage rotary vane vacuum pump, the drive motor is started to cooperate with the belt, reciprocating screw, slider and guide groove to drive the scraper rod to move, and the pump oil attached to the bottom of the No. 1 filter is scraped off to prevent the pump oil and impurities from adhering to the bottom of the No. 1 filter and causing the No. 1 filter to be blocked. The scraped pump oil and impurities fall into the guide groove and then flow into the recovery groove. After being filtered by the No. 2 filter, they flow into the pump body through the oil outlet pipe for recycling. After the No. 2 filter has worked for a period of time, the No. 2 filter is manually pulled out and cleaned, thereby improving the use effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the first cross-sectional structure of the utility model;

[0014] Figure 3 It is a schematic diagram of the second cross-sectional structure of the utility model;

[0015] Figure 4 It is a schematic diagram of the scraping mechanism structure of the utility model.

[0016] The meaning of each number in the figure is:

[0017] 1. Bottom plate; 2. Pump body; 3. Stator; 4. Rotor; 5. Inlet pipe; 6. Outlet pipe; 7. Filter No. 1; 8. Scraping mechanism; 81. Reciprocating screw rod; 82. Sliding block; 83. Guide groove; 84. Scraping rod; 9. Driving mechanism; 91. Driving motor; 92. Belt; 10. Recovery mechanism; 101. Recovery groove; 102. Filter No. 2. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-Figure 4 As shown, the present embodiment provides a high-efficiency and energy-saving multi-stage rotary vane vacuum pump, including a base plate 1, a pump body 2 is fixedly installed above the base plate 1, a stator 3 is fixedly connected inside the pump body 2, a rotor 4 is rotatably connected to the inner cavity of the stator 3, the rotor 4 rotates in the inner cavity of the stator 3 to process the air, an air inlet pipe 5 is fixedly connected to the top of the pump body 2, an air outlet pipe 6 is fixedly connected to the top of the pump body 2, a filter screen 7 is fixedly installed on the top of the air outlet pipe 6, the air enters the rotor 4 through the air inlet pipe 5, is processed by the stator 3, and then is discharged through the air outlet pipe 6, a scraping mechanism 8 for removing the pump oil attached to the bottom of the filter screen 7 is rotatably connected inside the air outlet pipe 6, effectively preventing the pump oil and impurities from adhering to the bottom of the filter screen 7, causing the filter screen 7 to be blocked, a driving mechanism 9 for driving the scraping mechanism 8 to move is fixedly installed above the base plate 1, and a recovery mechanism 10 is slidably connected inside the air outlet pipe 6 for recycling the pump oil removed by the scraping mechanism 8, thereby improving the use effect of the device.

[0020] The improvement of this embodiment is that:

[0021] Since most of the multi-stage rotary vane vacuum pumps are oil-sealed pumps, the exhaust port of the multi-stage rotary vane vacuum pump is generally open, so that when the multi-stage rotary vane vacuum pump is exhausted, the gas will not only carry the pump oil and may be discharged from the exhaust port, but the pump oil may splash out from the exhaust port during the exhaust process, thereby causing pollution to the equipment, etc.; the exhaust port of some multi-stage rotary vane vacuum pumps may be provided with a spray-proof cover, although the pump oil splashing is avoided, the pump oil on the spray-proof cover cannot be recovered for secondary utilization, which reduces the applicability of the device. Therefore, a scraping mechanism 8 is provided to cooperate with the driving mechanism 9 to scrape off the pump oil adhered to the bottom of the No. 1 filter 7, so as to avoid the pump oil and impurities adhering to the bottom of the No. 1 filter 7 and causing the No. 1 filter 7 to be blocked, and a recovery mechanism 10 is provided to recover the scraped pump oil for secondary utilization, thereby improving the use effect of the device.

[0022] Considering the need to scrape off the pump oil attached to the bottom of the first filter screen 7, the structure of the scraping mechanism 8 is further disclosed, such as Figure 3 and Figure 4 As shown, the scraping mechanism 8 includes a reciprocating screw 81 rotatably connected to the inner wall of the air outlet pipe 6, and one side of the reciprocating screw 81 is arranged to penetrate the air outlet pipe 6, and a slider 82 is screwed on the reciprocating screw 81. When the reciprocating screw 81 rotates, it can drive the slider 82 to move linearly on the reciprocating screw 81. The slider 82 is fixedly connected to a guide groove 83 on one side close to the central axis of the No. 1 filter screen 7. The movement of the slider 82 drives the guide groove 83 to move. The interior of the guide groove 83 is inclined to facilitate the flow of pump oil inside the guide groove 83. A scraper rod 84 is fixedly connected to the bottom of the guide groove 83, and the top of the scraper rod 84 is in contact with the bottom of the No. 1 filter screen 7. The movement of the guide groove 83 drives the scraper rod 84 to move, so as to scrape off the pump oil attached to the bottom of the No. 1 filter screen 7, and the scraped pump oil can fall into the guide groove 83.

[0023] Considering the need to drive the scraping mechanism 8 to move, the structure of the driving mechanism 9 is further disclosed, such as Figure 1 As shown, the driving mechanism 9 includes a driving motor 91 fixedly mounted above the base plate 1, and the output end of the driving motor 91 passes through the pump body 2 and is fixedly connected to one side of the rotor 4. When the driving motor 91 is started, the rotor 4 is driven to rotate to process the gas. A belt 92 is sleeved on the outer wall of the output end of the driving motor 91 located outside the pump body 2, and the side of the belt 92 away from the driving motor 91 is sleeved on the reciprocating screw 81. When the driving motor 91 rotates, it cooperates with the belt 92 to drive the reciprocating screw 81 to rotate.

[0024] Considering the need to recycle the pump oil removed by the scraping mechanism 8, the structure of the recovery mechanism 10 is further disclosed, such as Figure 3 and Figure 4As shown, the recovery mechanism 10 includes a No. 2 filter 102 slidably connected to the inner wall of the outlet pipe 6, and a recovery groove 101 is provided on the inner wall of the outlet pipe 6, and the No. 2 filter 102 is slidably connected to the recovery groove 101. The No. 2 filter 102 can be cleaned by manually pulling it out, and the No. 2 filter 102 is concavely arranged, so that when the No. 2 filter 102 is pulled out, impurities on its surface will not be scraped off, thereby improving the use effect of the device. The guide groove 83 extends to the inside of the recovery groove 101 on one side close to the recovery groove 101, and an oil outlet pipe is provided at the bottom of the recovery groove 101. Since the inside of the guide groove 83 is inclined, the pump oil inside the guide groove 83 can be filtered by the No. 2 filter 102, and then flow into the bottom of the recovery groove 101, and flow into the inside of the pump body 2 through the oil outlet pipe for recycling.

[0025] Taking into account the need to filter the air entering the pump body 2, a No. 3 filter is placed on the top of the air inlet pipe 5 to filter the air entering the pump body 2. A No. 1 bolt is connected between the No. 3 filter and the air inlet pipe 5, and a No. 2 bolt is connected between the No. 1 filter 7 and the air outlet pipe 6. By disassembling the No. 1 bolt and the No. 2 bolt, the No. 3 filter and the No. 1 filter 7 can be disassembled and replaced, thereby improving the use effect of the device.

[0026] When the utility model high-efficiency energy-saving multi-stage rotary vane vacuum pump is used, the drive motor 91 is started to drive the rotor 4 to rotate, and the pump body 2 is driven to work. When the drive motor 91 rotates, it cooperates with the belt 92 to drive the reciprocating screw 81 to rotate, thereby driving the slider 82 to move linearly on the reciprocating screw 81, and then drives the guide groove 83 to move. The movement of the guide groove 83 drives the scraper rod 84 to move, and the pump oil attached to the bottom of the first filter screen 7 is scraped off, and the scraped pump oil can fall into the guide groove 83;

[0027] Since the interior of the guide groove 83 is inclined, the pump oil in the guide groove 83 can flow into the recovery groove 101, and after being filtered by the No. 2 filter 102, it flows into the pump body 2 through the oil outlet pipe for reuse. After the device has been working for a period of time, the No. 2 filter 102 is manually pulled out and cleaned, thereby improving the use effect of the device.

[0028] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-efficiency and energy-saving multi-stage rotary vane vacuum pump, comprising a base plate (1), a pump body (2) fixedly mounted above the base plate (1), a stator (3) fixedly connected inside the pump body (2), a rotor (4) rotatably connected to the inner cavity of the stator (3), an air inlet pipe (5) fixedly connected to the top of the pump body (2), an air outlet pipe (6) fixedly connected to the top of the pump body (2), a No. 1 filter (7) fixedly mounted on the top of the air outlet pipe (6), characterized in that: The air outlet pipe (6) is rotatably connected to a scraping mechanism (8) for removing the pump oil attached to the bottom of the first filter (7); a driving mechanism (9) is fixedly installed above the bottom plate (1) for driving the scraping mechanism (8) to move; and the air outlet pipe (6) is slidably connected to a recovery mechanism (10) for recovering the pump oil removed by the scraping mechanism (8).

2. The high-efficiency and energy-saving multi-stage rotary vane vacuum pump according to claim 1, characterized in that: The scraping mechanism (8) comprises a reciprocating screw (81) rotatably connected to the inner wall of the air outlet pipe (6), and one side of the reciprocating screw (81) is arranged to penetrate the air outlet pipe (6), a slider (82) is screwed on the reciprocating screw (81), a side of the slider (82) close to the central axis of the first filter screen (7) is fixedly connected to a guide groove (83), a scraping rod (84) is fixedly connected to the bottom of the guide groove (83), and the top of the scraping rod (84) is in contact with the bottom of the first filter screen (7).

3. The high-efficiency and energy-saving multi-stage rotary vane vacuum pump according to claim 2, characterized in that: The driving mechanism (9) comprises a driving motor (91) fixedly mounted above the base plate (1); an output end of the driving motor (91) passes through the pump body (2) and is fixedly connected to one side of the rotor (4); a belt (92) is sleeved on the outer wall of the output end of the driving motor (91) located outside the pump body (2); and a side of the belt (92) away from the driving motor (91) is sleeved on the reciprocating screw rod (81).

4. The high-efficiency and energy-saving multi-stage rotary vane vacuum pump according to claim 3 is characterized in that: The recovery mechanism (10) comprises a No. 2 filter screen (102) slidably connected to the inner wall of the air outlet pipe (6); a recovery groove (101) is provided on the inner wall of the air outlet pipe (6); the No. 2 filter screen (102) is slidably connected to the recovery groove (101); a side of the guide groove (83) close to the recovery groove (101) extends to the inside of the recovery groove (101); and an oil outlet pipe is provided at the bottom of the recovery groove (101).

5. The high-efficiency and energy-saving multi-stage rotary vane vacuum pump according to claim 1, characterized in that: A No. 3 filter is placed on the top of the air inlet pipe (5), a No. 1 bolt is connected between the No. 3 filter and the air inlet pipe (5), and a No. 2 bolt is connected between the No. 1 filter (7) and the air outlet pipe (6).

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