Washable water-cooling roots vacuum pump

Abstract

The utility model discloses a washable water-cooling roots vacuum pump, and belongs to the technical field of vacuum pumps, the washable water-cooling roots vacuum pump comprises a pump body, the pump body is provided with a front cooling cavity, a working cavity and a rear cooling cavity, and the front cooling cavity or the rear cooling cavity is connected with a washing device; and the cleaning device is connected with the water inlet of the front cooling cavity or the rear cooling cavity. The pump can remove water scale, sediment and the like generated in the cooling cavity, the cooling effect of the cooling cavity is kept, and the service life of the pump is prolonged.

Description

Technical Field

[0001] The present application relates to a cleanable water-cooled Roots vacuum pump, belonging to the technical field of vacuum pumps. Background Art

[0002] A Roots vacuum pump is a rotary positive-displacement vacuum pump that generates a vacuum by the synchronous rotation of two lobed rotors in opposite directions. It can operate within a relatively wide pressure range and there is no oil in the working chamber. Currently, it has been widely used in fields such as petroleum, chemical industry, medicine, and food.

[0003] For example, a new type of Roots vacuum pump with the publication number CN206159040U authorized and announced on May 10, 2017, includes a pump body. The front end of the pump body is connected to a front end cover, and the rear end is connected to a rear end cover. A rotating shaft is arranged inside the pump body. Shaft mounting holes are provided on both the front end cover and the rear end cover. A front partition is arranged between the front end cover and the pump body, and a front oil tank is formed by enclosing the front end cover and the front partition. A rear partition is arranged between the rear end cover and the pump body, and a rear oil tank is formed by enclosing the rear end cover and the rear partition. Shaft mounting holes are opened on both the front partition and the rear partition; the inside of the side wall of the front end cover, the inside of the front partition, the inside of the side wall of the rear end cover, and the inside of the rear are all hollow structures, forming a hollow cavity. The hollow cavities are connected to form a cooling cavity, and a cooling water inlet and a cooling water outlet are opened on the cooling cavity.

[0004] During the long-term operation of this patent, scale, sediment, etc. will be generated in the cooling cavity, affecting the cooling effect and corroding the cavity, thereby reducing the working efficiency of the pump and affecting the performance and lifespan of the pump. Summary of the Utility Model

[0005] The technical problem to be solved by the present application is: to overcome the deficiencies of the prior art and provide a cleanable water-cooled Roots vacuum pump that can remove scale, sediment, etc. generated in the cooling cavity, maintain the cooling effect of the cooling cavity, and extend the lifespan of the pump.

[0006] The technical solution adopted by the present application to solve the problems it faces is:

[0007] A cleanable water-cooled Roots vacuum pump includes a pump body. The pump body is provided with a front cooling cavity, a working cavity, and a rear cooling cavity. The front cooling cavity or the rear cooling cavity is connected to a cleaning device;

[0008] The cleaning device is connected to the water inlet of the front cooling cavity or the rear cooling cavity.

[0009] Preferably, the working cavity is also connected to a cleaning device, and a hole communicating with the cleaning device is provided on the working cavity.

[0010] Preferably, the cleaning device is provided with a cleaning component, a cleaning cover and a first base. The cleaning cover and the cleaning component are respectively fixed on the first base. Through holes are provided above the upper top surface and the circumferential surface of the cleaning cover. Vertical chutes are provided on the inner circumferential surface of the cleaning cover, and a U-shaped through hole is provided below the cleaning cover.

[0011] The cleaning component includes a spray head, a second base, a spring group, a spring pressing plate and an L-shaped elbow pipe. The spray head is fixed on the spring pressing plate. The second base is fixed on the first base. The spring group is sleeved on the spring pressing plate and abuts against the second base. Two protruding cubes are provided on the outer circumference of the spring pressing plate. The spring pressing plate is installed in the cleaning cover, and the protruding cubes of the spring pressing plate are slidably connected with the vertical chutes of the cleaning cover. The L-shaped elbow pipe is fixed on the spring pressing plate, and one end of the L-shaped elbow pipe extends to the outside of the cleaning cover through the U-shaped through hole below the cleaning cover, and the L-shaped elbow pipe is communicated with the spray head.

[0012] Preferably, the cleaning device is provided with a pneumatic component that abuts against the spring pressing plate. The pneumatic component includes a pneumatic valve and a fixed connecting piece. A through hole is provided in the upper part of the pneumatic valve. The fixed connecting piece passes through the through hole in the upper part of the circumferential surface of the cleaning cover and the through hole in the upper part of the pneumatic valve. The top of the pneumatic valve extends out of the through hole on the top surface of the cleaning cover. One end of the fixed connecting piece is provided with a thread.

[0013] Preferably, the second base is provided with a sealing member that abuts against the spray head; the sealing member is made of HNBR hydrogenated nitrile material.

[0014] Preferably, the L-shaped elbow pipe is provided with a first interface, a second interface and a third interface.

[0015] Preferably, the spray head is made of 304 material.

[0016] Preferably, the spring group is made of 55Si2Mn material.

[0017] Compared with the prior art, the beneficial effects of the present application are as follows:

[0018] The cleaning device installed at the water inlet of the cooling cavity can clean the scale, sediment, etc. generated in the cooling cavity, maintain the cooling effect of the cooling cavity, and extend the performance and service life of the pump; when the cooling cavity does not need to be cleaned, the cleaning device can be used as a normal water inlet for water cooling circulation.

[0019] For the cleaning device installed on the working cavity, when the pump body is working normally, the spray head of the cleaning device does not interfere with the rotor of the working cavity. When cleaning is required, the spray head can extend into the cavity for cleaning work, which can clean the sediment and dust generated in the working cavity, is not easy to cause rotor blockage, and improves the working efficiency and service life of the pump. Description of the Drawings

[0020] Figure 1 This is a structural diagram of a washable water-cooled Roots vacuum pump for this application;

[0021] Figure 2 This is a structural diagram of a cleaning device in a washable water-cooled Roots vacuum pump for this application;

[0022] Figure 3 This is a cross-sectional view of a cleaning device in a washable water-cooled Roots vacuum pump for this application.

[0023] In the figure:

[0024] 1. Pump body, 2. Front cooling cavity, 3. Working cavity, 4. Rear cooling cavity, 5. Cleaning device, 6. Cleaning cover, 7. Pneumatic component, 8. Cleaning component, 9. First base, 10. Sprayer, 11. Seal, 12. Second base, 13. Spring group, 14. Spring pressing plate, 15. L-shaped elbow, 16. First interface, 17. Second interface, 18. Third interface, 19. Pneumatic valve, 20. Fixed connecting piece. Detailed implementation manners

[0025] As certain terms are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims of this application do not use the difference in names as a way to distinguish components, but use the difference in functions of components as the criterion for distinction. As mentioned throughout the specification and claims, "comprising" is an open-ended term and should be interpreted as "including but not limited to". "Substantially" means within an acceptable error range. Those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0026] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0028] As Figures 1 - 3 shown, a cleanable water-cooled Roots vacuum pump includes a pump body 1. The pump body 1 is provided with a front cooling cavity 2, a working cavity 3 and a rear cooling cavity 4. The front cooling cavity 2 and the rear cooling cavity 4 are respectively fixedly installed on both sides of the working cavity 3, and the front cooling cavity 2 and the rear cooling cavity 4 are connected by a pipeline. The front cooling cavity 2 or the rear cooling cavity 4 is equipped with a cleaning device 5, and the cleaning device 5 is connected to the water inlet of the front cooling cavity 2 or the rear cooling cavity 4. The working cavity 3 is also equipped with a cleaning device 5. There is a hole on the working cavity 3 that communicates with the cleaning device 5. The spray head 10 on the cleaning device 5 can extend into the working cavity 3 through the hole on the working cavity 3 to carry out the cleaning work.

[0029] The cleaning device 5 includes a cleaning cover 6, a pneumatic component 7, a cleaning component 8 and a first base 9. The cleaning cover 6 is fixed on the first base 9. Through holes are provided on the top surface and the upper part of the circumferential surface of the cleaning cover 6. Two vertical chutes are provided on the inner circumference of the cleaning cover 6, and a U-shaped through hole is provided below. The pneumatic component 7 includes a pneumatic valve 19 and a fixed connecting piece 20. A through hole is provided in the upper part of the pneumatic valve 19. The pneumatic valve 19 is installed in the cleaning cover 6. The top of the pneumatic valve 19 extends out of the through hole on the top surface of the cleaning cover 6. The fixed connecting piece 20 passes through the through hole in the upper part of the circumferential surface of the cleaning cover 6 and the through hole in the upper part of the pneumatic valve 19. One end of the fixed connecting piece 20 is provided with a thread, and the fixed connecting piece 20 is fastened to the cleaning cover 6 with a nut, thereby positioning the pneumatic valve 19. The telescopic rod below the pneumatic valve 19 abuts against the cleaning component 8, and the pneumatic valve 19 is connected to a gas source.

[0030] The cleaning component 8 is fixed on the first base 9. The cleaning component 8 includes a spray head 10, a second base 12, a spring group 13, a spring pressing plate 14 and an L-shaped elbow 15. The second base 12 is fixedly installed on the first base 9. A stepped through hole is provided in the middle of the second base 12, an annular groove is provided on the upper top surface, and a seal 11 is installed below. Combined with Figure 2 and Figure 3, two protruding cubes are provided on the outer circumference of the spring pressure plate 14. The two protruding cubes of the spring pressure plate 14 are installed in the cleaning cover 6 and form a sliding connection with two sliding grooves of the cleaning cover 6. A threaded through hole is provided in the middle of the spring pressure plate 14, and a plurality of spring stud pins are provided below. Each spring of the spring group 13 is sleeved on each spring stud pin of the spring pressure plate 14, and the lower part of the spring extends into the annular groove of the second base 12 and abuts against the annular groove. When not working, the spring group is in a released state. The spray head 10 passes through the stepped through hole of the second base 12 and is fixed on the spring pressure plate 14 by threaded connection. The lower part of the spray head 10 abuts against the seal 11 to form a sealed connection. The L-shaped elbow 15 is fixed above the spring pressure plate 14 and is communicated with the spray head 10. The L-shaped elbow 15 is provided with a first interface 16, a second interface 17 and a third interface 18. These three interfaces are respectively connected to compressed air, high-pressure cleaning liquid and tap water. When performing cleaning work, high-pressure cleaning liquid can be connected first for strong cleaning, and then tap water can be used for rinsing to rinse the cleaning liquid in the pump clean. Finally, compressed air is connected to dry the inside of the pump.

[0031] Combined with Figure 1 and Figure 3 , when the working cavity 3 of the pump body 1 needs to be cleaned, the pneumatic component 7 of the cleaning device 5 installed above the working cavity 3 is connected. The telescopic rod of the pneumatic component 7 moves downward, pushing the spring pressure plate 14 to move. Because the spring pressure plate 14 is equipped with a spring group 13, the spring group 13 is compressed, thereby pushing the spring pressure plate 14 to move downward. The spring pressure plate 14 drives the spray head 10 to move downward, and the spray head 10 extends into the working cavity 3 to work. After cleaning is completed, the pneumatic component 7 is closed, and the telescopic rod of the pneumatic component 7 moves upward, thereby driving the cleaning component 8 to return to its original position. When no cleaning is required, the spray head 10 is located outside the working cavity 3, does not interfere with the rotor in the cavity, and the spray head 10 and the seal 11 cooperate to form good airtightness.

[0032] Combined with Figure 1 and Figure 3 , since the front cooling cavity 2 and the rear cooling cavity 4 are connected by a pipeline, when the front cooling cavity 2 and the rear cooling cavity 4 of the pump body 1 need to be cleaned, the pneumatic component 7 of the cleaning device 5 installed below the front cooling cavity 2 or the rear cooling cavity 4 is connected. The telescopic rod of the pneumatic component 7 moves upward, pushing the spring pressure plate 14 to move. Because the spring pressure plate 14 is equipped with a spring group 13, the spring group 13 is compressed, thereby pushing the spring pressure plate 14 to move upward. The spring pressure plate 14 drives the spray head 10 to move upward, and the spray head 10 extends into the cooling cavity to work. After cleaning is completed, the pneumatic component 7 is closed, and the telescopic rod of the pneumatic component 7 moves downward, thereby driving the cleaning component 8 to return to its original position. When no cleaning is required, the cleaning device 5 serves as a normal water inlet for water cooling circulation.

[0033] The cleaning work requires a cleaning solution. The spray head 10 is made of 304 material, which is rust-proof, corrosion-resistant, and has good mechanical properties. The seal 11 is made of HNBR hydrogenated nitrile material, which has high corrosion resistance and crack resistance. The spring group 13 is made of 55Si2Mn material, which has high elasticity and good fatigue resistance.

[0034] The embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present application.

Claims

1. A washable water-cooled Roots vacuum pump, characterized in that: The pump body (1) comprises a front cooling cavity (2), a working cavity (3) and a rear cooling cavity (4), wherein the front cooling cavity (2) or the rear cooling cavity (4) is connected to a cleaning device (5); The cleaning device (5) is connected to the water inlet of the front cooling cavity (2) or the rear cooling cavity (4).

2. A washable water-cooled Roots vacuum pump according to claim 1, characterized in that: The working chamber (3) is also connected to a cleaning device (5), and a hole communicating with the cleaning device (5) is provided on the working chamber (3).

3. A washable water-cooled Roots vacuum pump according to claim 1 or 2, characterized in that: The cleaning device (5) is provided with a cleaning assembly (8), a cleaning cover (6) and a first base (9); the cleaning cover (6) and the cleaning assembly (8) are respectively fixed on the first base (9); through holes are provided on the upper top surface and the upper part of the circumferential surface of the cleaning cover (6); a vertical sliding groove is provided on the inner circumferential surface of the cleaning cover (6); and a U-shaped through hole is provided below the cleaning cover (6); The cleaning assembly (8) comprises a nozzle (10), a second base (12), a spring group (13), a spring pressure plate (14) and an L-shaped curved pipe (15). The nozzle (10) is fixed on the spring pressure plate (14). The second base (12) is fixed on the first base (9). The spring group (13) is sleeved on the spring pressure plate (14), and the spring group (13) abuts against the second base (12). Two protruding cubes are provided on the outer circumference of the spring pressure plate (14). The spring pressure plate (14) is installed in the cleaning cover (6). The protruding cubes of the spring pressure plate (14) are slidably connected with the vertical sliding groove of the cleaning cover (6). The L-shaped curved pipe (15) is fixed on the spring pressure plate (14). One end of the L-shaped curved pipe (15) extends to the outside of the cleaning cover (6) through a U-shaped through hole below the cleaning cover (6). The L-shaped curved pipe (15) is connected to the nozzle (10).

4. A washable water-cooled Roots vacuum pump according to claim 3, characterized in that: The cleaning device (5) is provided with a pneumatic assembly (7) abutting against the spring pressure plate (14), and the pneumatic assembly (7) includes a pneumatic valve (19) and a fixed connecting piece (20). The upper part of the pneumatic valve (19) is provided with a through hole, and the fixed connecting piece (20) passes through the upper through hole of the circumferential surface of the cleaning cover (6) and the upper through hole of the pneumatic valve (19). The top of the pneumatic valve (19) extends out of the top through hole of the cleaning cover (6), and one end of the fixed connecting piece (20) is provided with a thread.

5. The washable water-cooled Roots vacuum pump according to claim 3, characterized in that: The second base (12) is provided with a sealing member (11), and the sealing member (11) is in contact with the nozzle (10); the sealing member (11) is made of HNBR hydrogenated nitrile material.

6. A washable water-cooled Roots vacuum pump according to claim 3, characterized in that: The L-shaped curved pipe (15) is provided with a first interface (16), a second interface (17) and a third interface (18).

7. The washable water-cooled Roots vacuum pump according to claim 3, characterized in that: The nozzle (10) is made of 304 material.

8. The washable water-cooled Roots vacuum pump according to claim 3, characterized in that: The spring group (13) is made of 55Si2Mn material.

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