Liquid-cooled Roots vacuum pump

Abstract

The utility model belongs to the technical field of Roots vacuum pumps, and particularly relates to a liquid cooling type Roots vacuum pump which comprises a Roots vacuum pump body and further comprises a bottom plate, a water tank is fixedly installed at the top of the bottom plate, a filter plate is installed at a liquid inlet of the water tank in an inserted mode, a shell is fixedly installed at the top of the water tank, and the Roots vacuum pump body is located in the shell. A cavity is formed in the shell, a first U-shaped pipe is fixedly installed on one side of the shell, and a water outlet pipe is fixedly installed at the bottom of the first U-shaped pipe and located on one side of the air cooling mechanism on the water tank. When the whole device is used, it is ensured that dust in air can be prevented from being attached to liquid discharged by the water outlet pipe and entering the water tank together with the liquid, the phenomenon that the flowability of water in the cavity is affected is avoided, incrustation scale can be prevented from being generated on the inner wall of the cavity, the service life of the whole device is longer, and the service life of the whole device is prolonged. And meanwhile, bolts are not needed during fixing or dismounting, and mounting and dismounting are convenient and fast.

Description

Technical Field

[0001] The utility model belongs to the technical field of Roots vacuum pumps, in particular to a liquid-cooled Roots vacuum pump. Background Art

[0002] A Roots vacuum pump (abbreviated as: Roots pump) is a variable displacement vacuum pump that is equipped with two leaf-shaped rotors rotating synchronously in opposite directions. There is a small gap between the rotors and between the rotors and the inner wall of the pump casing, and they do not contact each other.

[0003] For example, the Chinese patent with announcement number CN219827149U discloses a liquid-cooled Roots vacuum pump, including a Roots vacuum pump body, which includes an outer shell, a lower support is provided on the lower side of the outer shell through a support frame, liquid cooling grooves are provided on both sides of the outer shell, and the two ends of the liquid cooling groove are respectively connected to a liquid inlet pipe and a liquid outlet pipe, a liquid storage box is provided in the middle of the upper side of the lower support, the liquid outlet at one end of the liquid outlet pipe is arranged above the liquid inlet of the liquid storage box, and an air cooling mechanism is installed on one side of the upper end of the liquid storage box. The interior of the liquid cooling groove is divided into multiple circulating water cooling grooves by a partition. The utility model is provided with liquid cooling grooves on the inner walls of both sides of the outer shell, and the two ends of the liquid cooling groove are respectively connected to the liquid inlet pipe and the liquid outlet pipe, and the liquid outlet at one end of the liquid outlet pipe is arranged above the liquid inlet of the liquid storage box, so that the inner wall of the outer shell can be water-cooled and heat dissipated, and the air cooling mechanism is installed on one side of the upper end of the liquid storage box, so that the reflux water and the lower part of the outer shell can be air-cooled, and the heat dissipation cooling effect is good.

[0004] The above patent has the following problems:

[0005] When fixing this device, bolts are generally used, which makes it inconvenient to install and disassemble it. In addition, the opening of the liquid storage box in this device is exposed to the outside, and some dust may float into the liquid storage box, which will affect the fluidity of the water in the liquid cooling tank and cause scale to form on the inner wall of the liquid cooling tank, shortening its service life. In view of this, we propose a liquid-cooled Roots vacuum pump. Utility Model Content

[0006] The purpose of the utility model is to provide a liquid-cooled Roots vacuum pump to solve the problems raised in the above background technology.

[0007] In view of this, the utility model provides a liquid-cooled Roots vacuum pump, comprising a Roots vacuum pump body, and further comprising:

[0008] A bottom plate, a water tank is fixedly installed on the top of the bottom plate, a filter plate is plugged and installed at the liquid inlet of the water tank, a shell is fixedly installed on the top of the water tank, the Roots vacuum pump body is located in the shell, a cavity is defined in the shell, a U-shaped tube 1 is fixedly installed on one side of the shell, a water outlet pipe is fixedly installed at the bottom of the U-shaped tube 1, and the water outlet pipe is located on one side of the air cooling mechanism on the water tank;

[0009] a liquid supply assembly, the liquid supply assembly being located on one side of the water tank and being used to transport the liquid in the water tank into the cavity;

[0010] A connecting plate, the connecting plate is located at the bottom of the base plate, a limiting groove is symmetrically provided on the top of the connecting plate, a sliding groove is symmetrically provided on the bottom of the base plate, a bidirectional threaded rod is rotatably installed in the sliding groove, a connecting block is symmetrically slidably installed in the sliding groove and on the bidirectional threaded rod, an L-shaped plate is fixedly installed on the bottom of the connecting block, and the lower end of the L-shaped plate extends into the corresponding limiting groove;

[0011] A driving assembly is located in the base plate and is used to drive the two bidirectional threaded rods to rotate.

[0012] In the present technical solution, when in use, the liquid supply assembly is provided to transport the liquid in the water tank into the cavity. Subsequently, the water in the cavity enters the U-shaped tube 1, and the liquid in the U-shaped tube 1 is discharged from the water outlet pipe. This puts the liquid in the cavity in a flowing state, and can liquid-cool the Roots vacuum pump body. At this time, the air cooling mechanism can air-cool the liquid discharged from the water outlet pipe. Subsequently, the liquid will fall on the filter plate, which can filter the liquid to prevent dust in the air from adhering to the liquid and entering the water tank together, thereby preventing too much dust from affecting the fluidity of the liquid in the cavity and preventing scale from forming on the inner wall of the cavity.

[0013] During installation, the four L-shaped plates are placed in the corresponding limit grooves. At this time, the bottom of the base plate will contact the top of the connecting plate. Then, the driving assembly is used to drive the two bidirectional threaded rods to rotate forward. Under the action of the threads, the two connecting blocks on the bidirectional threaded rods are displaced and approach each other. At the same time, the two connecting blocks will drive the corresponding L-shaped plates to approach each other. The L-shaped plates will be displaced in the limit grooves until the L-shaped plates can no longer move. Then, the staff will insert the pin into the pull rod, and the pull rod will be fixed. At this time, the base plate will be fixed to the connecting plate.

[0014] During disassembly, the driving assembly is set again to drive the two bidirectional threaded rods to rotate in opposite directions. Under the action of the threads, the two connecting blocks on the bidirectional threaded rods are displaced and move away from each other. At the same time, the two connecting blocks will drive the corresponding L-shaped plates to move away from each other, and the L-shaped plates will be displaced in the limit grooves, so that the L-shaped plates can be moved out of the limit grooves, thereby separating the base plate from the connecting plate. The above installation and disassembly process does not require the use of bolts and auxiliary tools, which is more convenient.

[0015] In the above technical solution, further, the liquid supply component includes:

[0016] A water pump is fixedly installed on one side of the water tank, the water inlet end of the water pump is fixed and connected to the inner cavity of the water tank, and the water outlet end of the water pump is fixedly installed with a U-shaped tube 2 fixed to the outer shell, and both ends of the U-shaped tube 2 are connected to the cavity.

[0017] In this technical solution, the water pump is started to extract the liquid in the water tank. Then, the water pump will transport the liquid into U-shaped tube 2. Then, the liquid in U-shaped tube 2 will enter the cavity, ensuring that the liquid in the water tank can be transported into the cavity.

[0018] In the above technical solution, further, the driving component includes:

[0019] A power cavity, which is opened in the bottom plate and located on the same side of the two slide grooves, a rack is slidably installed in the power cavity, and two gears are rotatably installed in the power cavity and at the bottom of the rack. One end of the bidirectional threaded rod passes through one side of the slide groove and extends into the power cavity and is coaxially connected with the corresponding gear. A pull rod is fixedly installed on one end of the rack, and one end of the pull rod passes through one side of the power cavity and extends to the outside. A pin is inserted into the pull rod, and the top end of the pin passes through the top of the power cavity and extends to the outside.

[0020] In this technical solution, the staff pushes the pull rod by hand, so that the pull rod drives the rack to move. Under the action of meshing, the rack will drive the two gears to rotate. Subsequently, the two gears will respectively drive the two bidirectional threaded rods to rotate, ensuring that the two bidirectional threaded rods can be driven to rotate at the same time.

[0021] In the above technical solution, further, the rack is engaged with the gear, one end of the bidirectional threaded rod is rotationally connected to the power chamber, the pull rod is slidingly connected to the power chamber, and the latch is slidingly connected to the power chamber.

[0022] In this technical solution, under the action of meshing, the rack can drive the gear to rotate when it is displaced; ensure that the pull rod can slide in the power cavity; ensure that the pin can slide in the power cavity.

[0023] In the above technical solution, further, the water outlet pipe is located directly above the filter plate, and both ends of the U-shaped tube are connected to each other by cavities.

[0024] In this technical solution, it is ensured that the liquid discharged from the water outlet pipe can fall on the filter plate; it is ensured that the water in the cavity can enter the U-shaped tube.

[0025] In the above technical solution, further, the connecting block is threadedly connected to the bidirectional threaded rod, the bidirectional threaded rod is provided with two sections of threads with opposite rotation directions, and the lower end of the L-shaped plate is plugged into the limiting groove.

[0026] In this technical solution, under the action of the threads, when the bidirectional threaded rod rotates, the two connecting blocks on the bidirectional threaded rod will move closer to or farther away from each other.

[0027] In the above technical solution, further, the filtering accuracy of the filter plate is 1 μm-100 μm.

[0028] In this technical solution, it is ensured that dust can be prevented from entering the water tank.

[0029] The beneficial effects of the utility model are:

[0030] The liquid-cooled Roots vacuum pump, through the cooperation between the filter plate, bidirectional threaded rod, connecting block, L-shaped plate, connecting plate, limit groove and drive assembly, ensures that dust in the air can be prevented from adhering to the liquid discharged from the outlet pipe and entering the water tank together, avoiding affecting the fluidity of the water in the cavity. It can also prevent scale from forming on the inner wall of the cavity, making the service life of the entire device longer. At the same time, no bolts are required when fixing or disassembling, and installation and disassembly are relatively convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is one of the overall structural diagrams of the utility model;

[0032] Figure 2 This is the second schematic diagram of the overall structure of the utility model;

[0033] Figure 3 This is a schematic diagram of the internal structure of the bottom plate and the connecting plate of the utility model;

[0034] Figure 4 This is a schematic diagram of the cross-sectional structure of the midsole plate of the present invention;

[0035] Figure 5 This is a schematic diagram of the cross-sectional structure of the connecting plate in the present utility model;

[0036] Figure 6 This is a schematic diagram of the regional structure of the bidirectional threaded rod in the present utility model;

[0037] Figure 7 This is a schematic diagram of the cross-sectional structure of the shell in the figure of the present invention.

[0038] The marks in the figure are:

[0039] 1. Roots vacuum pump body; 2. Outer casing; 3. U-shaped tube 1; 4. U-shaped tube 2; 5. Water pump; 6. Bottom plate; 7. Connecting plate; 8. Filter plate; 9. Water tank; 10. Bidirectional threaded rod; 11. Connecting block; 12. L-shaped plate; 13. Rack; 14. Gear; 15. Pull rod; 16. Latch; 17. Slide; 18. Power chamber; 19. Limit groove; 20. Cavity; 21. Water outlet pipe. DETAILED DESCRIPTION

[0040] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0041] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures. Example 1

[0042] See also Figure 1 - Figure 7 As shown, this embodiment provides a liquid-cooled Roots vacuum pump, including a Roots vacuum pump body 1, and further comprising:

[0043] A bottom plate 6 is provided, and a water tank 9 is fixedly mounted on the top of the bottom plate 6. A filter plate 8 is plugged into and mounted on the liquid inlet of the water tank 9. A housing 2 is fixedly mounted on the top of the water tank 9. The Roots vacuum pump body 1 is located within the housing 2. A cavity 20 is defined within the housing 2. A U-shaped tube 3 is fixedly mounted on one side of the housing 2. A water outlet pipe 21 is fixedly mounted on the bottom of the U-shaped tube 3, and the water outlet pipe 21 is located on one side of the air cooling mechanism on the water tank 9.

[0044] The liquid supply assembly is located on one side of the water tank 9 and is used to transport the liquid in the water tank 9 to the cavity 20;

[0045] Connecting plate 7, connecting plate 7 is located at the bottom of base plate 6, and limiting grooves 19 are symmetrically provided on the top of connecting plate 7. Slide grooves 17 are symmetrically provided on the bottom of base plate 6. A bidirectional threaded rod 10 is rotatably installed in the slide groove 17. A connecting block 11 is symmetrically slidably installed in the slide groove 17 and on the bidirectional threaded rod 10. An L-shaped plate 12 is fixedly installed at the bottom of the connecting block 11, and the lower end of the L-shaped plate 12 extends into the corresponding limiting groove 19;

[0046] The driving assembly is located in the base plate 6 and is used to drive the two bidirectional threaded rods 10 to rotate.

[0047] During use, the liquid supply assembly is provided to transport the liquid in the water tank 9 to the cavity 20. Subsequently, the water in the cavity 20 enters the U-shaped tube 3, and the liquid in the U-shaped tube 3 is discharged from the water outlet pipe 21. This puts the liquid in the cavity 20 in a flowing state, and can perform liquid cooling and heat dissipation on the Roots vacuum pump body 1. At this time, the air cooling mechanism can perform air cooling on the liquid discharged from the water outlet pipe 21. Subsequently, the liquid will fall on the filter plate 8, which can filter the liquid to prevent dust in the air from adhering to the liquid and entering the water tank 9 together, thereby preventing too much dust from affecting the fluidity of the liquid in the cavity 20 and preventing scale from forming on the inner wall of the cavity 20.

[0048] During installation, the four L-shaped plates 12 are placed in the corresponding limiting grooves 19. At this time, the bottom of the base plate 6 will contact the top of the connecting plate 7. Subsequently, the driving assembly is provided to drive the two bidirectional threaded rods 10 to rotate forward. Under the action of the threads, the two connecting blocks 11 on the bidirectional threaded rods 10 are displaced and approach each other. At the same time, the two connecting blocks 11 will drive the corresponding L-shaped plates 12 to approach each other. The L-shaped plates 12 will be displaced in the limiting grooves 19 until the L-shaped plates 12 can no longer move. Subsequently, the staff will insert the pin 16 into the pull rod 15, and the pull rod 15 will be fixed. At this time, the base plate 6 will be fixed to the connecting plate 7;

[0049] During disassembly, the driving assembly is again used to drive the two bidirectional threaded rods 10 to rotate in opposite directions. Under the action of the threads, the two connecting blocks 11 on the bidirectional threaded rods 10 are displaced and move away from each other. At the same time, the two connecting blocks 11 will drive the corresponding L-shaped plates 12 to move away from each other, and the L-shaped plates 12 will be displaced in the limiting grooves 19, so that the L-shaped plates 12 can be moved out of the limiting grooves 19, thereby separating the base plate 6 from the connecting plate 7. The above installation and disassembly process does not require the use of bolts and auxiliary tools, which is more convenient. Example 2

[0050] This embodiment provides a liquid-cooled Roots vacuum pump. In addition to the technical solutions of the above embodiments, it also has the following technical features. The liquid supply component includes:

[0051] Water pump 5, water pump 5 is fixedly installed on one side of water tank 9, the water inlet end of water pump 5 is fixed and connected to the inner cavity of water tank 9, and the water outlet end of water pump 5 is fixedly installed with U-shaped tube 2 4 fixed to outer shell 2, and both ends of U-shaped tube 2 4 are connected to cavity 20.

[0052] Among them, the water pump 5 is started to extract the liquid in the water tank 9, and then the water pump 5 will transport the liquid to the U-shaped tube 2 4. Then, the liquid in the U-shaped tube 2 4 will enter the cavity 20, ensuring that the liquid in the water tank 9 can be transported to the cavity 20. Example 3

[0053] This embodiment provides a liquid-cooled Roots vacuum pump. In addition to the technical solutions of the above embodiments, it also has the following technical features. The drive assembly includes:

[0054] The power chamber 18 is opened in the base plate 6 and is located on the same side of the two slide grooves 17. A rack 13 is slidably installed in the power chamber 18. Two gears 14 are rotatably installed in the power chamber 18 and at the bottom of the rack 13. One end of the bidirectional threaded rod 10 passes through one side of the slide groove 17 and extends into the power chamber 18 and is coaxially connected with the corresponding gear 14. A pull rod 15 is fixedly installed at one end of the rack 13. One end of the pull rod 15 passes through one side of the power chamber 18 and extends to the outside. A pin 16 is inserted into the pull rod 15, and the top end of the pin 16 passes through the top of the power chamber 18 and extends to the outside.

[0055] Among them, the staff pushes the pull rod 15 by hand, so that the pull rod 15 drives the rack 13 to move. Under the action of meshing, the rack 13 will drive the two gears 14 to rotate. Subsequently, the two gears 14 will respectively drive the two bidirectional threaded rods 10 to rotate, ensuring that the two bidirectional threaded rods 10 can be driven to rotate at the same time. Example 4

[0056] This embodiment provides a liquid-cooled Roots vacuum pump, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features: the rack 13 is meshed with the gear 14, one end of the bidirectional threaded rod 10 is rotatably connected to the power chamber 18, the pull rod 15 is slidably connected to the power chamber 18, and the pin 16 is slidably connected to the power chamber 18.

[0057] Among them, under the action of meshing, the rack 13 can drive the gear 14 to rotate when displaced; ensure that the pull rod 15 can slide in the power chamber 18; ensure that the latch 16 can slide in the power chamber 18. Example 5

[0058] This embodiment provides a liquid-cooled Roots vacuum pump, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the water outlet pipe 21 is located directly above the filter plate 8, and the cavities 20 at both ends of the U-shaped tube 3 are connected.

[0059] Among them, it is ensured that the liquid discharged from the outlet pipe 21 can fall on the filter plate 8; and it is ensured that the water in the cavity 20 can enter the U-shaped tube 3. Example 6

[0060] This embodiment provides a liquid-cooled Roots vacuum pump, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features: the connecting block 11 is threadedly connected to the bidirectional threaded rod 10, the bidirectional threaded rod 10 is provided with two sections of threads with opposite rotation directions, and the lower end of the L-shaped plate 12 is plugged into the limit groove 19.

[0061] Wherein, under the action of the threads, when the bidirectional threaded rod 10 rotates, the two connecting blocks 11 on the bidirectional threaded rod 10 will approach each other or move away from each other. Example 7

[0062] This embodiment provides a liquid-cooled Roots vacuum pump. In addition to the technical solutions of the above embodiments, it also has the following technical features: the filtration accuracy of the filter plate 8 is 1 μm-100 μm.

[0063] This ensures that dust can be prevented from entering the water tank 9 .

[0064] It is worth noting that the air cooling mechanism on the water tank 9 can perform air cooling on the liquid discharged from the water outlet pipe 21. The structure and principle of the air cooling mechanism of this embodiment are both prior art. For details, please refer to the comparative document (publication number CN219827149U, patent name is a liquid-cooled Roots vacuum pump), which will not be described in detail here.

[0065] Working principle: When in use, the staff starts the water pump 5 to make the water pump 5 extract the liquid in the water tank 9. Then, the water pump 5 will transport the liquid to the U-shaped tube 2 4. Then, the liquid in the U-shaped tube 2 4 will enter the cavity 20. Then, the water in the cavity 20 will enter the U-shaped tube 1 3. The liquid in the U-shaped tube 1 3 will be discharged from the water outlet pipe 21. In this way, the liquid in the cavity 20 is in a flowing state, which can perform liquid cooling and heat dissipation on the Roots vacuum pump body 1. At this time, the air cooling mechanism can perform air cooling on the liquid discharged from the water outlet pipe 21. Then, the liquid will fall on the filter plate 8. The filter plate 8 can filter the liquid to prevent dust in the air from adhering to the liquid and entering the water tank 9 together, so as to prevent too much dust from affecting the fluidity of the liquid in the cavity 20, and to prevent scale from forming on the inner wall of the cavity 20.

[0066] During installation, the four L-shaped plates 12 are placed in the corresponding limit grooves 19. At this time, the bottom of the base plate 6 will contact the top of the connecting plate 7. Then, the staff pushes the pull rod 15 by hand, so that the pull rod 15 drives the rack 13 to move. Under the action of meshing, the rack 13 will drive the two gears 14 to rotate. Subsequently, the two gears 14 will respectively drive the two bidirectional threaded rods 10 to rotate. Under the action of the threads, the two connecting blocks 11 on the bidirectional threaded rods 10 will move and approach each other. At the same time, the two connecting blocks 11 will drive the corresponding L-shaped plates 12 to approach each other. The L-shaped plates 12 will move in the limit grooves 19 until the L-shaped plates 12 can no longer move. Then, the staff inserts the pin 16 into the pull rod 15, and the pull rod 15 will be fixed. At this time, the base plate 6 will be fixed on the connecting plate 7;

[0067] During disassembly, the staff will pull out the pin 16 from the pull rod 15, and then the staff will pull the pull rod 15, so that the pull rod 15 drives the rack 13 to move. Under the action of meshing, the rack 13 will drive the two gears 14 to rotate. Subsequently, the two gears 14 will respectively drive the two bidirectional threaded rods 10 to rotate. Under the action of the thread, the two connecting blocks 11 on the bidirectional threaded rod 10 will move and move away from each other. At the same time, the two connecting blocks 11 will drive the corresponding L-shaped plates 12 to move away from each other, and the L-shaped plates 12 will move in the limiting groove 19, so that the L-shaped plates 12 can be moved out of the limiting groove 19, thereby separating the base plate 6 from the connecting plate 7. No bolts and auxiliary tools are required in the above installation and disassembly process, which is more convenient.

[0068] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A liquid-cooled Roots vacuum pump, comprising a Roots vacuum pump body (1), characterized in that: Also includes: A bottom plate (6), a water tank (9) is fixedly mounted on the top of the bottom plate (6), a filter plate (8) is plugged and mounted at the liquid inlet of the water tank (9), a shell (2) is fixedly mounted on the top of the water tank (9), the Roots vacuum pump body (1) is located in the shell (2), a cavity (20) is opened in the shell (2), a U-shaped tube (3) is fixedly mounted on one side of the shell (2), a water outlet pipe (21) is fixedly mounted on the bottom of the U-shaped tube (3), and the water outlet pipe (21) is located on one side of the air cooling mechanism on the water tank (9); a liquid supply assembly, the liquid supply assembly being located on one side of the water tank (9) and being used to transport the liquid in the water tank (9) into the cavity (20); A connecting plate (7), the connecting plate (7) being located at the bottom of the base plate (6), the top of the connecting plate (7) being symmetrically provided with a limiting groove (19), the bottom of the base plate (6) being symmetrically provided with a slide groove (17), a bidirectional threaded rod (10) being rotatably installed in the slide groove (17), a connecting block (11) being symmetrically slidably installed in the slide groove (17) and on the bidirectional threaded rod (10), an L-shaped plate (12) being fixedly installed at the bottom of the connecting block (11), and the lower end of the L-shaped plate (12) extending into the corresponding limiting groove (19); A driving assembly is located inside the base plate (6) and is used to drive the two bidirectional threaded rods (10) to rotate.

2. A liquid-cooled Roots vacuum pump according to claim 1, characterized in that: The liquid supply assembly comprises: A water pump (5), the water pump (5) being fixedly mounted on one side of the water tank (9), the water inlet end of the water pump (5) being fixed to and connected with the inner cavity of the water tank (9), the water outlet end of the water pump (5) being fixedly mounted with a U-shaped tube 2 (4) fixed to the outer casing (2), both ends of the U-shaped tube 2 (4) being connected with the cavity (20).

3. A liquid-cooled Roots vacuum pump according to claim 1, characterized in that: The drive assembly comprises: A power chamber (18), wherein the power chamber (18) is opened in the bottom plate (6) and is located on the same side of the two slide grooves (17), a rack (13) is slidably installed in the power chamber (18), and two gears (14) are rotatably installed in the power chamber (18) and located at the bottom of the rack (13), one end of the bidirectional threaded rod (10) passes through one side of the slide groove (17) and extends into the power chamber (18) and is coaxially connected to the corresponding gear (14), a pull rod (15) is fixedly installed at one end of the rack (13), one end of the pull rod (15) passes through one side of the power chamber (18) and extends to the outside, a latch (16) is inserted and installed in the pull rod (15), and the top end of the latch (16) passes through the top of the power chamber (18) and extends to the outside.

4. A liquid-cooled Roots vacuum pump according to claim 3, characterized in that: The rack (13) is meshed with the gear (14), one end of the bidirectional threaded rod (10) is rotatably connected to the power chamber (18), the pull rod (15) is slidably connected to the power chamber (18), and the latch (16) is slidably connected to the power chamber (18).

5. A liquid-cooled Roots vacuum pump according to claim 1, characterized in that: The water outlet pipe (21) is located directly above the filter plate (8), and both ends of the U-shaped tube (3) are connected to the cavity (20).

6. A liquid-cooled Roots vacuum pump according to claim 1, characterized in that: The connecting block (11) is threadedly connected to the bidirectional threaded rod (10); the bidirectional threaded rod (10) is provided with two sections of threads with opposite rotation directions; the lower end of the L-shaped plate (12) is plugged into and matched with the limiting groove (19).

7. The liquid-cooled Roots vacuum pump according to claim 1, characterized in that: The filtering accuracy of the filter plate (8) is 1 μm-100 μm.

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