Dry type screw vacuum pump

Abstract

The utility model discloses a dry type screw vacuum pump, which relates to the field of screw vacuum pumps and comprises a pump body and an air inlet processing mechanism. An air inlet is formed in the top of the pump body, and an air inlet treatment mechanism is mounted at the air inlet; the air inlet treatment mechanism consists of a case, a filter screen, an air inlet pipe, a water storage box, a filter bag and an air outlet pipe; an air inlet hole is formed in the top of the case, an air outlet hole is formed in the bottom of the case, and the air outlet hole corresponds to the air inlet in position; a filter screen is arranged at the air inlet; the bottom of the filter screen is connected with an air inlet pipe; the water storage box is installed in the machine box, one end of the air inlet pipe is connected with the filter screen, and the other end of the air inlet pipe is located in the water storage box; a filter bag is mounted in an area above the water storage box in the air inlet pipe; the vacuum pump has an air inlet filtering and cooling function, so that air entering the vacuum pump is in a clean and low-temperature state, and cooling and daily maintenance work during working of the vacuum pump are facilitated.

Description

Technical Field

[0001] The utility model relates to the field of screw vacuum pumps, in particular to a dry screw vacuum pump. Background Art

[0002] A dry screw vacuum pump is an exhaust device that uses a pair of screws to perform synchronous high-speed counter-rotation in the pump casing to produce suction and exhaust effects. The two screws are finely dynamically balanced, supported by bearings, and installed in the pump casing. There is a certain gap between the screws, so when the pump is working, there is no friction between them, the operation is stable, the noise is low, and the working chamber does not require lubricating oil. Therefore, the dry screw pump can extract gases containing large amounts of water vapor and small amounts of dust. It has higher ultimate vacuum, lower power consumption, energy saving, and maintenance-free advantages.

[0003] Since the screw vacuum pump generates heat when working, the conventional cooling method is to cool it through a cold water pipe inside the pump casing, which has a cooling effect on the high-speed screw vacuum pump. However, the screw vacuum pump often works in a high-temperature workshop, and the temperature of the air entering the vacuum pump itself is relatively high. If the gas before entering the vacuum pump can be pre-cooled and filtered, the air entering the vacuum pump will become clean low-temperature air, which will promote the cooling and maintenance of the vacuum pump. Utility Model Content

[0004] In order to solve the above-mentioned problems of the prior art, the utility model provides a dry screw vacuum pump with an air intake filtration and cooling function, so that the gas entering the vacuum pump is clean and in a low-temperature state, which is beneficial to the cooling of the vacuum pump during operation and daily maintenance work.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a dry screw vacuum pump, comprising a pump body and an air intake processing mechanism; an air inlet is provided on the top of the pump body, and an air intake processing mechanism is installed at the air inlet; the air intake processing mechanism is composed of a chassis, a filter, an air inlet pipe, a water storage box, a filter bag and an air outlet pipe; an air inlet hole is provided on the top of the chassis, and an air outlet hole is provided at the bottom of the chassis, and the air outlet hole corresponds to the position of the air inlet; a filter is provided at the air inlet hole, and the bottom of the filter is connected to the air inlet pipe; a water storage box is installed in the chassis, one end of the air inlet pipe is connected to the filter, and the other end of the air inlet pipe is located in the water storage box; a filter bag is installed in the area above the water storage box inside the air inlet pipe; an air outlet pipe is also provided in the chassis, one end of the air outlet pipe is connected to the top of the water storage box, and the other end of the air outlet pipe is connected to the air outlet.

[0006] The air outlet is provided with multiple sealing rings of different diameters, and the sealing ring of appropriate diameter can be selected according to the outer diameter of the air inlet to prevent air leakage.

[0007] The top end of the water storage box is connected to one end of the water inlet pipe, the other end of the water inlet pipe extends to the outside of the chassis and is installed with an electric control valve. The water inlet pipe can be connected to an external cooling water source. When the cooling water in the water storage box needs to be replaced, water can be added to the water storage box through the water inlet pipe; the bottom end of the water storage box is connected to one end of the drain pipe, the other end of the drain pipe extends to the outside of the chassis and is installed with an electric control valve. The drain pipe is used to drain the water in the water storage box.

[0008] The water storage box is equipped with a temperature sensor for monitoring the cooling water temperature and a liquid level sensor for monitoring the water level. The temperature sensor and the liquid level sensor are electrically connected to an electrically controlled valve. When the temperature sensor detects that the water temperature exceeds a set temperature, it triggers the operation of the electrically controlled valve. Specifically, the electrically controlled valve on the drain pipe is first activated and closes after all the water in the water storage box is drained. Then, the electrically controlled valve on the water inlet pipe is opened, allowing new low-temperature cooling water to enter the water storage box. When the set water level is reached, the liquid level sensor sends a signal to the electrically controlled valve, which closes the electrically controlled valve on the water inlet pipe, completing the water change.

[0009] The bottom of the chassis is connected to a telescopic rod, and the bottom end of the telescopic rod is connected to the base; the telescopic rod and the base can support the chassis to keep it horizontal. Screw holes can be set on the base, and the base can be installed on the pump body through bolts, so that the air intake processing mechanism is fixed to the pump body.

[0010] The beneficial effects of the utility model are as follows: the dry screw vacuum pump is provided with an air intake processing mechanism with an air intake filtering and cooling function. First, impurities in the air are filtered through a filter screen and a filter bag, and the pure air then enters the cooling water for cooling, and then enters the screw vacuum pump, thereby prompting the air entering the pump body to be clean and at a low temperature, which is beneficial to the cooling of the vacuum pump during operation and daily maintenance work; the cooling water can be automatically replaced, saving manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0012] Figure 1 It is a structural principle diagram of the utility model;

[0013] Figure 2 It is a structural diagram of the sealing ring.

[0014] Markings in the figure: 1. Pump body, 2. Chassis, 3. Filter, 4. Air inlet pipe, 5. Water storage box, 6. Filter bag, 7. Air outlet pipe, 8. Sealing ring, 9. Water inlet pipe, 10. Drain pipe, 11. Electric control valve, 12. Telescopic rod, 13. Base. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] Reference Figure 1-2 , this embodiment provides a dry screw vacuum pump, including a pump body 1 and an air intake processing mechanism; the top of the pump body 1 is provided with an air inlet, and the air intake processing mechanism is installed at the air inlet; the air intake processing mechanism is composed of a chassis 2, a filter 3, an air inlet pipe 4, a water storage box 5, a filter bag 6 and an air outlet pipe 7; the top of the chassis 2 is provided with an air inlet, and the bottom of the chassis 2 is provided with an air outlet, and the air outlet corresponds to the position of the air inlet; a detachable filter 3 is provided at the air inlet, and the filter 3 is used to remove mosquitoes and cilia in the air To filter and block, the bottom of the filter screen 3 is connected to the air intake pipe 4 with bolts; a water storage box 5 is installed in the chassis 2, and cooling water is stored in the water storage box 5. One end of the air intake pipe 4 is connected to the filter screen 3, and the other end of the air intake pipe 4 is located below the water surface in the water storage box 5; a filter bag 6 is installed inside the air intake pipe 4 in an area 5 above the water storage box, and the filter bag 6 is used to filter and block small particles of dust in the air; an air outlet pipe 7 is also provided in the chassis 2, one end of the air outlet pipe 7 is connected to the top of the water storage box 5, and the other end of the air outlet pipe 7 is connected to the air outlet.

[0017] In this embodiment, in order to improve air tightness, multiple circles of sealing rings 8 with different diameters are provided at the air outlet. The sealing ring 8 with a suitable diameter can be selected according to the outer diameter of the air inlet to prevent air leakage.

[0018] In this embodiment, in order to facilitate the replacement of the cooling water in the water storage box 5, the top end of the water storage box 5 is connected to one end of the water inlet pipe 9, the other end of the water inlet pipe 9 extends to the outside of the chassis 2 and is installed with an electric control valve 11, and the water inlet pipe 9 can be connected to an external cooling water source. When the cooling water in the water storage box 5 needs to be replaced, new cooling water can be injected into the water storage box 5 through the water inlet pipe 9; the bottom end of the water storage box 5 is connected to one end of the drain pipe 10, the other end of the drain pipe 10 extends to the outside of the chassis 2 and is installed with an electric control valve 11, and the drain pipe 10 is used to discharge the water in the water storage box 5 that has heated up.

[0019] Furthermore, the water storage box 5 is equipped with a temperature sensor for monitoring the cooling water temperature and a liquid level sensor for monitoring the water level. The temperature sensor and the liquid level sensor are electrically connected to the electric control valve 11. When the temperature sensor detects that the water temperature exceeds the set temperature, it triggers the operation of the electric control valve 11. That is, the electric control valve 11 on the drain pipe 10 is first activated and closed after all the water in the water storage box 5 is drained. Then the electric control valve 11 on the water inlet pipe 9 is opened, and new low-temperature cooling water enters the water storage box 5. When the set water level is reached, the liquid level sensor sends a signal to the electric control valve 11, and the electric control valve 11 on the water inlet pipe 9 is closed, completing the water change.

[0020] In this embodiment, in order to ensure that the air intake processing mechanism is stably installed on the pump body 1, four telescopic rods 12 are connected to the bottom of the chassis 2, and the bottom ends of the telescopic rods 12 are connected to the base 13; the telescopic rods 12 and the base 13 can support the chassis 2 to keep it in a horizontal state, and screw holes can be provided on the base 13, and the base 3 can be installed on the pump body 1 by bolts, thereby fixing the air intake processing mechanism on the pump body 1.

[0021] To use this device, select a sealing ring with the appropriate size and fasten it to the pump body's air inlet. Then, adjust the length of telescopic rod 12 and bolt base 13 to the outer shell of pump body 1. When pump body 1 is operating, negative pressure is generated at the air inlet. External air first enters inlet pipe 4, is filtered by filter screen 3 and filter bag 6, and then enters the cooling water for cooling. It then enters the air inlet of pump body 1 through outlet pipe 7. Since the inner wall of screw vacuum pumps is generally coated with Teflon for corrosion and rust resistance, the moist air will not cause rust on the internal components.

[0022] When the outside air temperature is high, the temperature of the cooling water will rise after working for a period of time. After the temperature sensor detects that the water temperature exceeds the set temperature, the electric control valve 11 on the drain pipe 10 is started first, and then closed until all the water in the water storage box 5 is drained. Then the electric control valve 11 on the water inlet pipe 9 is opened, and new low-temperature cooling water enters the water storage box 5. After reaching the set water level, the liquid level sensor sends a signal to the electric control valve 11, and the electric control valve 11 on the water inlet pipe 9 is closed to achieve water change.

[0023] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved through or by adopting existing technologies, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A dry screw vacuum pump, comprising a pump body (1) and an air intake processing mechanism; an air intake port is provided on the top of the pump body (1), and the air intake processing mechanism is installed at the air intake port; characterized in that, The air intake processing mechanism is composed of a chassis (2), a filter (3), an air intake pipe (4), a water storage box (5), a filter bag (6) and an air outlet pipe (7); an air intake hole is provided at the top of the chassis (2), and an air outlet hole is provided at the bottom of the chassis (2), and the air outlet hole corresponds to the position of the air intake port; a filter (3) is provided at the air intake hole, and the bottom of the filter (3) is connected to the air intake pipe (4); a water storage box (5) is installed in the chassis (2), one end of the air intake pipe (4) is connected to the filter (3), and the other end of the air intake pipe (4) is located in the water storage box (5); a filter bag (6) is installed in the air intake pipe (4) in an area above the water storage box (5); an air outlet pipe (7) is also provided in the chassis (2), one end of the air outlet pipe (7) is connected to the top of the water storage box (5), and the other end of the air outlet pipe (7) is connected to the air outlet hole.

2. The dry screw vacuum pump according to claim 1, characterized in that The air outlet is provided with multiple sealing rings (8) of different diameters.

3. The dry screw vacuum pump according to claim 1, characterized in that The top end of the water storage box (5) is connected to one end of the water inlet pipe (9), the other end of the water inlet pipe (9) extends to the outside of the chassis (2) and is installed with an electric control valve (11); the bottom end of the water storage box (5) is connected to one end of the drainage pipe (10), the other end of the drainage pipe (10) extends to the outside of the chassis (2) and is installed with an electric control valve (11).

4. The dry screw vacuum pump according to claim 3, characterized in that A temperature sensor for monitoring the temperature of cooling water and a liquid level sensor for monitoring the water level are provided in the water storage box (5), and the temperature sensor and the liquid level sensor are electrically connected to the electric control valve (11).

5. The dry screw vacuum pump according to claim 1, characterized in that The bottom of the chassis (2) is connected to a telescopic rod (12), and the bottom end of the telescopic rod (12) is connected to a base (13).

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