Water ring vacuum pump cleaning device

Abstract

The invention discloses a water ring vacuum pump cleaning device, and relates to the technical field of pump machine maintenance, the water ring vacuum pump cleaning device is characterized in that a positioning seat is rotatably connected with a rotating disc, the rotating disc and an impeller of a water ring vacuum pump are coaxially arranged, and the positioning seat is provided with a resistance pressing plate elastically abutted against and matched with the impeller; the cleaning assembly is arranged on the rotary disc through a support and comprises a guide rod, a screw, a threaded sleeve, a spraying module and a servo motor, the guide rod is slidably arranged on the support in the axial direction of the impeller, the spraying module is arranged at one end of the guide rod, the screw is parallel to and fixedly connected with the guide rod, the threaded sleeve is rotationally connected to the support and is in threaded connection with the screw, and the servo motor drives the threaded sleeve to rotate. The screw rod, the guide rod and the spray-washing module move in the axial direction of the impeller, and the spray-washing module enters an interval space between two adjacent blades of the impeller and sprays cleaning liquid to the surfaces of the blades and the inner wall of a shell of the water ring vacuum pump; and the stepping motor drives the turntable to intermittently rotate on the positioning seat, so that the spray-washing module sequentially enters each interval space of the impeller for cleaning operation.

Description

Technical Field

[0001] This invention relates to the field of pump maintenance technology, specifically a water ring vacuum pump cleaning device. Background Technology

[0002] A water ring vacuum pump is a positive displacement vacuum pump that uses water as its working medium. It utilizes the high-speed rotation of an impeller to drive the working fluid into a closed water ring. The volume change between the water ring and the impeller blades enables the intake, compression, and discharge of gas. During operation, impurities in the working medium, as well as contaminants such as oil, dust, and crystals carried in the pumped gas, adhere and form scale on the impeller surface and the inner wall of the pump casing. This negatively impacts the pump's performance and lifespan, such as disrupting impeller balance and increasing fluid resistance.

[0003] Therefore, water ring vacuum pumps require regular cleaning and maintenance. Currently, this mainly involves removing the impeller from the pump body for cleaning. Impeller removal requires a tensioner to ensure the tension acts along the impeller axis; otherwise, the tension will be dispersed, damaging the impeller's balance. Since the impeller shaft bore and pump body shaft are interference-fitted, reinstalling the impeller after cleaning is time-consuming and labor-intensive. An induction heater is used to heat the impeller hub to approximately 180°C. After removing the heater, the keyway of the impeller hub is aligned with the flat key on the drive shaft. The impeller is then quickly pushed to the shoulder positioning surface. Once in place, room-temperature water is immediately and slowly poured into the pump chamber to ensure the cooling water completely covers the impeller hub, rapidly reducing the temperature to below 80°C. Subsequent dynamic balancing of the impeller is also necessary.

[0004] The above-mentioned cleaning methods for water ring vacuum pumps involve cumbersome disassembly and assembly procedures, a high risk of impeller damage, and low cleaning efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a water ring vacuum pump cleaning device to solve the problems of cumbersome disassembly and assembly procedures, high risk of impeller damage, and low cleaning efficiency in the existing water ring vacuum pump cleaning methods.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a water ring vacuum pump cleaning device, comprising: a positioning seat on which a turntable is rotatably connected, the turntable being coaxially arranged with the impeller of the water ring vacuum pump, and a resistance pressure plate elastically engaging with the impeller on the positioning seat; a cleaning assembly mounted on the turntable via a bracket, comprising a guide rod, a screw, a screw sleeve, a spray cleaning module, and a servo motor, the guide rod being slidably mounted on the bracket along the impeller axial direction, the spray cleaning module being located at one end of the guide rod, the screw being parallel to and fixedly connected to the guide rod, the screw sleeve being rotatably connected to the bracket and threadedly connected to the screw, and the servo motor being mounted on the bracket to drive the screw sleeve to rotate, thereby causing the screw, guide rod, and spray cleaning module to move along the impeller axial direction, the spray cleaning module entering the space between two adjacent blades of the impeller to spray cleaning liquid onto the blade surface and the inner wall of the water ring vacuum pump housing; and a stepper motor mounted on the positioning seat to drive the turntable to rotate intermittently on the positioning seat, thereby causing the spray cleaning module to sequentially enter each space of the impeller for cleaning operations.

[0007] Furthermore, the spraying module includes a water collection pipe and multiple fan-shaped nozzles. The water collection pipe is fixedly connected to a guide rod, and each fan-shaped nozzle is fixedly connected to the water collection pipe in a ring array and is connected to it.

[0008] Furthermore, the fan-shaped cleaning liquid sprayed by the fan-shaped nozzle forms an angle of 20°-40° with the inner wall of the housing or the blades. Furthermore, the guide rod has a flow channel inside, with one end connected to the water collection pipe and the other end connected to the water supply pipe.

[0009] Furthermore, the bracket is provided with an arc-shaped track coaxial with the screw, and a linear bearing is slidably connected to the arc-shaped track along the circumference. The linear bearing is slidably connected to the guide rod coaxially, so that the guide rod can swing around the screw to adjust the spray direction of the spraying module.

[0010] Furthermore, two opposing abutment parts are fixedly connected to the guide rod. The two abutment parts correspond to two blades spaced apart, and abut against the corresponding blade surfaces during the swing of the guide rod around the screw to make the impeller rotate and expose the inner wall of the shielded housing.

[0011] Furthermore, the positioning seat is provided with a connecting arm, which includes a rotating rod and a sliding rod. The rotating rod is rotatably connected to the positioning seat and is provided with a rotating locking component. The sliding rod is slidably connected to the rotating rod and is provided with a sliding locking component. The open end of the sliding rod is provided with a sleeve, and the sleeve is connected to the mounting hole at the opening of the housing by bolts.

[0012] Furthermore, the positioning seat is provided with an elastic telescopic rod coaxial with the turntable. The sleeve of the elastic telescopic rod is fixedly connected to the positioning seat, and the inner rod of the elastic telescopic rod is fixedly connected to the resistance pressure plate.

[0013] Furthermore, one end of the inner rod passes through the resistance plate, and the inner rod is inserted into the shaft hole of the impeller to achieve coaxiality between the turntable and the impeller.

[0014] Furthermore, a rubber pad is provided on the side of the resistance plate that abuts against the impeller.

[0015] Compared with existing technologies, the water ring vacuum pump cleaning device provided by this invention only requires disassembling the end cover of the water ring vacuum pump to clean the surface of each blade of the impeller and the inner wall of the housing. A servo motor drives a screw sleeve and screw rod to allow the spray cleaning module to enter the space between two adjacent blades, thoroughly spraying and cleaning the blade surfaces and the inner wall of the water ring vacuum pump housing. A stepper motor drives a turntable to rotate intermittently, allowing the spray cleaning module to sequentially enter other spaces of the impeller for cleaning operations. The cleaning effect is excellent, and the cleaning process requires no manual intervention. It eliminates the complex disassembly and assembly process of the impeller, does not damage the impeller, and significantly improves the cleaning effect of the pump. Attached Figure Description

[0016] To provide a clearer description of the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the embodiments will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram of the cleaning process provided in the embodiment; Figure 2 A front view of the structure during cleaning, provided for an embodiment; Figure 3 A schematic diagram of the structure after installation is provided for an embodiment; Figure 4 A schematic diagram of the overall structure provided for the embodiment; Figure 5 Schematic diagram of the cleaning assembly provided in the embodiment Figure I ; Figure 6 Schematic diagram of the cleaning assembly provided in the embodiment Figure II ; Figure 7 A schematic diagram of the connection structure of the connecting arm, turntable, and positioning seat provided in the embodiment; Figure 8 A schematic diagram of the connection structure between the elastic telescopic rod and the positioning seat of the resistance pressure plate machine provided in the embodiment; Figure 9 This is a schematic diagram of the structure when the first contact part contacts the impeller, as provided in the embodiment. Figure 10 This is a schematic diagram of the structure when the second contact part contacts the impeller, as provided in the embodiment.

[0018] Explanation of reference numerals in the attached figures: 1. Positioning seat; 2. Connecting arm; 21. Rotating rod; 22. Rotation locking element; 23. Sliding rod; 24. Sliding locking element; 25. Sleeve; 3. Turntable; 4. Elastic telescopic rod; 5. Resistance pressure plate; 6. Cleaning assembly; 61. Bracket; 62. Guide rod; 63. Screw; 64. Screw sleeve; 65. Servo motor; 66. Spraying module; 661. Water collection pipe; 662. Fan-shaped nozzle; 67. Arc track; 68. Slider; 69. Linear bearing; 610. First abutment part; 611. Second abutment part; 7. Stepper motor. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Please see Figures 1-10 The present invention provides a water ring vacuum pump cleaning device, including a positioning seat 1, a turntable 3, a connecting arm 2, a cleaning component 6, and a stepper motor 7.

[0021] The positioning seat 1 is provided with at least one connecting arm 2, which is used to fix the positioning seat 1 to the housing of the water ring vacuum pump, so as to satisfy the eccentric connection between the positioning seat 1 and the housing.

[0022] The turntable 3 and the positioning seat 1 are rotatably connected via a slewing bearing. The turntable 3 can rotate 360° on the positioning seat 1, and the turntable 3 is arranged coaxially with the impeller of the water ring vacuum pump. The cleaning assembly 6 is mounted on the turntable 3 via a bracket 61 and can rotate with the turntable 3 on the positioning seat 1. The positioning seat 1 is provided with a resistance plate 5 that elastically abuts against the end face of the impeller. A rubber pad is provided on the side of the resistance plate 5 that abuts against the impeller to apply resistance to the rotation of the impeller. The rubber pad can provide greater frictional resistance and also prevent the resistance plate 5 from wearing the impeller.

[0023] like Figure 7As shown, the connecting arm 2 specifically includes a rotating rod 21 and a sliding rod 23. The rotating rod 21 is rotatably connected to the positioning seat 1 and is provided with a rotating locking element 22. The sliding rod 23 is slidably connected to the rotating rod 21 and is provided with a sliding locking element 24. The open end of the sliding rod 23 is provided with a sleeve 25, which is bolted to the mounting hole at the opening of the housing. Both the rotating locking element 22 and the sliding locking element 24 are lock nuts. The lock nut of the rotating locking element 22 is threadedly connected to the rotating shaft between the rotating rod 21 and the positioning seat 1; the lock nut of the sliding locking element 24 is rotatably connected to the end of the rotating rod 21 and threadedly connected to the sliding rod 23. By rotating the rotating rod 21, the sliding rod 23 and the sleeve 25 can be aligned with the mounting holes at the opening of the housing (there are usually 5-6 mounting holes, originally used to install the end cover of the water ring vacuum pump, which are exposed after the end cover is removed). By moving the sliding rod 23, the cylinder hole of the sleeve 25 can be aligned with the mounting hole, and then the bolt pair can be installed to fix the sleeve 25 to the housing, thereby ensuring that the positioning seat 1 is connected to the housing when the turntable 3 and the impeller are coaxial. The number of connecting arms 2 is preferably 2-3.

[0024] like Figures 5-6 As shown, the cleaning assembly 6 is mounted on the turntable 3 via a bracket 61. It includes a guide rod 62, a screw 63, a screw sleeve 64, a spray cleaning module 66, and a servo motor 65. The guide rod 62 is slidably mounted on the bracket 61 along the impeller axis. The spray cleaning module 66 is located at one end of the guide rod 62. The screw 63 is parallel to the guide rod 62 and fixedly connected via a connector. The screw sleeve 64 is rotatably connected to the bracket 61 and threadedly connected to the screw 63. The servo motor 65, mounted on the bracket 61, drives the screw sleeve 64 to rotate, causing the screw 63, guide rod 62, and spray cleaning module 66 to move along the impeller axis. The spray cleaning module 66 enters the space between two adjacent blades of the impeller, spraying cleaning fluid onto the blade surface and the inner wall of the water ring vacuum pump housing for cleaning. After the spray cleaning module 66 reaches the innermost part of the space, the servo motor 65 reverses, causing the spray cleaning module 66 to move back out of the space for a secondary cleaning. For the same space, the spray cleaning module 66 can perform multiple back-and-forth cleaning operations.

[0025] A stepper motor 7 is mounted on the positioning seat 1 to drive the turntable 3 to rotate intermittently on the positioning seat 1. After the cleaning component 6 completes the cleaning of the current interval space, the servo motor 65 reverses to drive the spray cleaning module 66 out of the current interval space. Then, the stepper motor 7 drives the rotation to rotate by a preset angle, so that the cleaning component 6 is aligned with the next interval space to be cleaned. Then, the servo motor 65 rotates forward to drive the spray cleaning module 66 to enter the aligned cleaning workpiece for cleaning. In this way, the spray cleaning module 66 can sequentially enter each interval space of the impeller for cleaning operations.

[0026] The water ring vacuum pump cleaning device provided by this invention only requires disassembling the end cover of the water ring vacuum pump to clean the surface of each blade of the impeller and the inner wall of the housing. A servo motor 65 drives a screw sleeve 64 to cooperate with a screw 63, causing the spray cleaning module 66 to enter the space between two adjacent blades, thoroughly spraying and cleaning the blade surfaces and the inner wall of the water ring vacuum pump housing. A stepper motor 7 drives a turntable 3 to rotate intermittently, causing the spray cleaning module 66 to sequentially enter other spaces of the impeller for cleaning operations. The cleaning effect is good, and the cleaning process requires no manual intervention. It eliminates the complex disassembly and assembly process of the impeller, does not damage the impeller, and significantly improves the cleaning effect of the pump.

[0027] In the above technical solution, the spray cleaning module 66 includes a water collection pipe 661 and multiple fan-shaped nozzles 662. Preferably, there are 5-8 fan-shaped nozzles 662. The water collection pipe 661 is fixedly connected to the guide rod 62, and the fan-shaped nozzles 662 are fixedly connected to the water collection pipe 661 in a ring array and are interconnected. The fan-shaped cleaning liquid sprayed by the fan-shaped nozzles 662 forms a 20°-40° angle with the inner wall of the housing or the blades. The sprayed cleaning liquid has both impact force and lateral shear force on the dirt, resulting in a better dirt removal effect compared to vertical rinsing.

[0028] There are two ways to supply water to the water collection pipe 661. One way is to connect the water supply pipe directly to the outlet pipe of the water pump. The water supply pipe should be a flexible hose, and care should be taken to guide the hose when the spray washing module 66 moves in and out of the interval space. The other way is that the guide rod 62 has a flow channel inside, one end of which is connected to the water collection pipe 661 and the other end is connected to the water supply pipe. In this way, the water supply pipe does not need to enter or exit the interval space.

[0029] Regarding the specific installation structure of the resistance plate 5, such as Figure 8 As shown, an elastic telescopic rod 4 needs to be configured. The elastic telescopic rod 4 consists of a sleeve rod and an inner rod that are slidably connected. A compression spring is also provided inside the sleeve rod. One end of the compression spring is connected to the bottom of the sleeve rod, and the other end abuts against the bottom of the inner rod. The elastic telescopic rod 4 needs to be arranged coaxially with the turntable 3. Its sleeve rod is fixedly connected to the positioning seat 1, and its inner rod is fixedly connected to the resistance plate 5. In addition, one end of the inner rod passes through the resistance plate 5. When installing the positioning seat 1, the inner rod is first inserted into the shaft hole of the impeller, so that the turntable 3 and the impeller are coaxial. Then the connecting arm 2 is installed on the housing. The outline dimension of the resistance plate 5 is larger than the shaft hole size. The resistance plate 5 elastically abuts against the end face of the impeller. The rubber pad on the surface of the resistance plate 5 generates frictional resistance between itself and the end face of the impeller. Without applying a large rotational driving force to the impeller, the resistance plate 5 can prevent the impeller from rotating, so that the impeller remains stable, which is convenient for the cleaning assembly 6 to clean.

[0030] In another embodiment of the present invention, the bracket 61 is provided with an arc-shaped track 67 coaxial with the screw 63. The center of the arc-shaped track 67 is on the axis of the screw 63. A slider 68 adapted to the arc-shaped track 67 is slidably connected circumferentially inside the arc-shaped track 67. A linear bearing 69 is fixedly connected to the slider 68. The linear bearing 69 is slidably connected coaxially with the guide rod 62. Therefore, the guide rod 62 can slide axially along the screw 63 and move axially along the arc-shaped track 67 relative to the bracket 61. That is, the guide rod 62 can swing around the screw 63, thereby adjusting the spraying position of each fan-shaped nozzle 662 of the spray cleaning module 66. Before and after the spray cleaning module 66 swings around the screw 63 with the guide rod 62, it does not contact the blades on both sides.

[0031] Thus, if the fan-shaped cleaning liquid sprayed by two adjacent fan-shaped nozzles 662 of the spraying module 66 is not connected, resulting in an area not being sprayed, or if the fan-shaped cleaning liquid sprayed by two adjacent fan-shaped nozzles 662 is connected, but the impact force of the fan-shaped cleaning liquid sprayed by the fan-shaped nozzles 662 near the edge is not as strong as the impact force in the middle, resulting in insufficient spraying, in this embodiment, when the servo motor 65 drives the screw sleeve 64 to rotate, due to the thread resistance between the screw sleeve 64 and the screw 63, and the screw 63 and the guide rod 62 having a small degree of freedom of rotation due to the presence of the arc track 67, the screw sleeve 64 will first drive the screw 63, the guide rod 62 and the spraying module to rotate together until the slider 68 abuts against one end of the arc track 67, making the screw 63 unable to continue rotating, and then the screw sleeve 64 will drive the screw 63 to move axially. Therefore, each time the screw sleeve 64 changes its rotation direction, the screw 63, guide rod 62, and spray module will first swing at a preset angle, and then move axially. When the spray module 66 reaches the innermost part of the interval space, the servo motor 65 reverses, causing the spray module 66 to swing at a preset angle along the screw 63. This adjusts the spray direction of each fan-shaped nozzle 662 to a state that is misaligned with the original spray direction when the spray module 66 entered the interval space, covering areas that were not previously sprayed or were only lightly sprayed. During its return journey to the outside of the interval space, the spray module 66 performs supplementary cleaning to eliminate defects, thus achieving a thorough cleaning effect.

[0032] In another embodiment of the present invention, based on the above embodiment, the length of the arc-shaped track 67 is extended, increasing the swing amplitude of the spraying module 66 around the screw 63 with the guide rod 62, exceeding the space between two adjacent blades. Furthermore, two opposing abutment portions are fixedly connected to the guide rod 62, with ball bearings rolled at the open ends of the abutment portions. The two abutment portions correspond to two blades spaced apart. For ease of description, one of the two abutment portions is designated as the first abutment portion 610, and the other as the second abutment portion 611. Thus, as... Figures 9-10As shown, when the spray cleaning module 66 and the guide rod 62 enter the interval space, the first abutment part 610 is close to one of the blades. When the spray cleaning module 66 reaches the innermost part of the interval space, when the screw sleeve 64 switches the rotation direction, the screw 63, the guide rod 62 and the spray module swing. The second abutment part 611 abuts against the other blade and continuously applies pressure to overcome the frictional resistance between the impeller and the resistance plate 5, causing the impeller to rotate at a certain angle until the guide rod 62 swings into place (the slider 68 abuts against the end of the arc track 67). Then the spray cleaning module 66 moves out of the interval space.

[0033] This embodiment further achieves two effects: first, it increases the swing range of the spray cleaning module 66, exceeding the spatial limitation between two adjacent blades, thereby increasing the adjustment range of the spray direction of each fan-shaped nozzle 662, resulting in more thorough supplementary cleaning; second, it causes the impeller to rotate, thereby changing the position of the inner wall of the housing corresponding to the outer edge of the blades, exposing the dirty area of ​​the inner wall of the housing that was originally covered by the outer edge of one of the blades when the spray cleaning module 66 entered the interval space, thus rinsing this dirty area during the outward return stroke of the spray cleaning module 66. The cleaning of other interval spaces follows the same principle, thereby achieving thorough cleaning of the impeller blades and the inner wall of the housing.

[0034] The foregoing description of certain exemplary embodiments of the present invention should not be construed as limiting the scope of protection of the claims. Those skilled in the art will recognize that the described embodiments can be modified in other ways without departing from the spirit and scope of the invention.

Claims

1. A water ring vacuum pump cleaning device, characterized in that, include: A positioning seat is rotatably connected to a turntable, which is coaxially arranged with the impeller of the water ring vacuum pump. The positioning seat is provided with a resistance pressure plate that elastically abuts against the impeller. The cleaning assembly, mounted on a turntable via a bracket, includes a guide rod, a screw, a screw sleeve, a spray cleaning module, and a servo motor. The guide rod is slidably mounted on the bracket along the impeller axis. The spray cleaning module is located at one end of the guide rod. The screw is parallel to and fixedly connected to the guide rod. The screw sleeve is rotatably connected to the bracket and threadedly connected to the screw. The servo motor is mounted on the bracket to drive the screw sleeve to rotate, causing the screw, guide rod, and spray cleaning module to move along the impeller axis. The spray cleaning module enters the space between two adjacent blades of the impeller and sprays cleaning fluid onto the blade surface and the inner wall of the water ring vacuum pump housing. A stepper motor, mounted on a positioning seat, drives the turntable to rotate intermittently on the positioning seat, so that the spray cleaning module sequentially enters each interval space of the impeller for cleaning operations.

2. The water ring vacuum pump cleaning device according to claim 1, characterized in that, The spraying module includes a water collection pipe and multiple fan-shaped nozzles. The water collection pipe is fixedly connected to a guide rod, and each fan-shaped nozzle is fixedly connected to the water collection pipe in a ring array and is connected to it.

3. The water ring vacuum pump cleaning device according to claim 2, characterized in that, The fan-shaped nozzle sprays a fan-shaped cleaning liquid at an angle of 20°-40° to the inner wall of the housing or the blades.

4. The water ring vacuum pump cleaning device according to claim 2, characterized in that, The guide rod has a flow channel inside, with one end connected to the water collection pipe and the other end connected to the water supply pipe.

5. The water ring vacuum pump cleaning device according to claim 1, characterized in that, The bracket is provided with an arc-shaped track coaxial with the screw, and a linear bearing is slidably connected to the arc-shaped track along the circumference. The linear bearing is slidably connected to the guide rod coaxially, so that the guide rod can swing around the screw to adjust the spray direction of the spraying module.

6. The water ring vacuum pump cleaning device according to claim 1, characterized in that, The guide rod is fixedly connected to two opposing abutment parts, which correspond to two blades spaced apart. During the swinging of the guide rod around the screw, the abutment parts abut against the corresponding blade surfaces to make the impeller rotate and expose the inner wall of the shielded housing.

7. The water ring vacuum pump cleaning device according to claim 1, characterized in that, The positioning seat is provided with a connecting arm, which includes a rotating rod and a sliding rod. The rotating rod is rotatably connected to the positioning seat and is provided with a rotating locking component. The sliding rod is slidably connected to the rotating rod and is provided with a sliding locking component. The open end of the sliding rod is provided with a sleeve, and the sleeve is connected to the mounting hole at the opening of the housing by bolts.

8. The water ring vacuum pump cleaning device according to claim 1, characterized in that, The positioning seat is provided with an elastic telescopic rod coaxial with the turntable. The sleeve of the elastic telescopic rod is fixedly connected to the positioning seat, and the inner rod of the elastic telescopic rod is fixedly connected to the resistance pressure plate.

9. The water ring vacuum pump cleaning device according to claim 8, characterized in that, One end of the inner rod passes through the resistance plate, and the inner rod is inserted into the shaft hole of the impeller to achieve coaxiality between the turntable and the impeller.

10. The water ring vacuum pump cleaning device according to claim 1, characterized in that, A rubber pad is provided on the side of the resistance plate that abuts against the impeller.

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