Device for avoiding cavitation phenomenon of vacuum pump

Abstract

The invention discloses a device for avoiding the cavitation phenomenon of a vacuum pump, and relates to the field of vacuum pumps, the device comprises a vacuum pump body, an exhaust pipe is installed on the left side of the vacuum pump body, a gas-liquid separator is installed on the top of the exhaust pipe, and a cavitation protection pipe is installed on the front face of the gas-liquid separator; a hose is installed at the bottom of the gas-liquid separator, a working liquid supply pipe is installed on the front face of the vacuum pump body, and a fastening base is arranged at the bottom of the vacuum pump body. According to the device for avoiding the cavitation phenomenon of the vacuum pump, the gas-liquid separator and the cavitation protection pipe are additionally arranged on the vacuum pump body, so that the cavitation phenomenon of the vacuum pump body can be effectively avoided; on the basis of the vacuum pump body, the amount of working liquid in the inner cavity of the vacuum pump body can be increased, the temperature of the working liquid is reduced, the temperature of the working liquid and the liquid vaporization amount can be reduced, and the cavitation prevention effect is achieved.

Description

Technical Field

[0001] The present invention relates to the field of vacuum pumps, and particularly to a device for avoiding cavitation of vacuum pumps. Background Art

[0002] A vacuum pump refers to a device or equipment that uses mechanical, physical, chemical, or physical-chemical methods to evacuate the container to be pumped to obtain a vacuum. A vacuum pump is a device that improves, generates, and maintains a vacuum in a closed space by various methods. Vacuum pumps can basically be divided into two types: gas capture pumps and gas transfer pumps, which are widely used in industries such as metallurgy, chemical industry, food, and electronic coating. Common vacuum pumps include dry screw vacuum pumps, water ring pumps, reciprocating pumps, sliding vane pumps, rotary vane pumps, Roots pumps, and diffusion pumps, etc.

[0003] The vacuum pump extracts the non-condensable gas in the condenser, thereby ensuring the vacuum degree of the evaporation system. There is no gas-liquid separator at the original designed outlet of the vacuum pump, and there are the following disadvantages: the temperature of the vacuum pump body is relatively high, the cooling water consumption is large, the cavitation of the vacuum pump is serious, the maintenance is frequent, and the cost of spare parts is high.

[0004] Therefore, it is very necessary to propose a device for avoiding cavitation of vacuum pumps to solve the above problems. Summary of the Invention

[0005] The main purpose of the present invention is to provide a device for avoiding cavitation of vacuum pumps, which can effectively solve the problems in the background art.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A device for avoiding cavitation of vacuum pumps includes a vacuum pump body. An exhaust pipe is installed on the left side of the vacuum pump body. A gas-liquid separator is installed on the top of the exhaust pipe. An anti-cavitation protection pipe is installed on the front of the gas-liquid separator. A hose is installed on the bottom of the gas-liquid separator. A working fluid supply pipe is installed on the front of the vacuum pump body; A fastening base is provided at the bottom of the vacuum pump body. Positioning components are symmetrically and movably connected to both sides of the top of the fastening base. Fastening components are symmetrically and movably connected to the four sides of the top of the fastening base. An activity seat is provided at the bottom of the fastening component. A connecting column is installed at the bottom of the activity seat. A suction cup is installed at the bottom of the connecting column.

[0007] Preferably, an intake pipe is installed on the right side of the vacuum pump body. The other end of the hose is connected to the working fluid supply pipe. The other end of the exhaust pipe is installed on the outer wall of the vacuum pump body. An outlet pipe is installed on the top of the gas-liquid separator.

[0008] Preferably, a second gear is rotatably connected to the top of the gas-liquid separator, a servo motor is installed on the top of the gas-liquid separator, a first gear is installed on the top of the servo motor through a first rotating shaft, and the first gear meshes with the second gear.

[0009] Preferably, the second gear is of a cavity structure, a connecting rod is installed in the inner cavity of the second gear, the other end of the connecting rod is installed with a connecting shaft, the connecting shaft is rotatably connected in the inner cavity of the gas-liquid separator, a first connecting gear is installed at the bottom of the connecting shaft, and the first connecting gear is rotatably connected to the bottom of the inner cavity of the gas-liquid separator.

[0010] Preferably, a scraper is installed on the side of the connecting shaft, the outer wall of the scraper fits against the inner wall of the gas-liquid separator, a stirring rod is rotatably connected in the inner cavity of the scraper, a second connecting gear is installed at the bottom of the stirring rod, and the second connecting gear meshes with the first connecting gear.

[0011] Preferably, movable grooves are symmetrically opened at both ends of the top of the fastening base, a guide rod is installed in the inner cavity of one movable groove, a bidirectional lead screw is rotatably connected in the inner cavity of the other movable groove, both ends of the bottom of the positioning assembly are symmetrically and movably connected in the inner cavities of the two movable grooves, one end of the bottom of the positioning assembly is sleeved on the outer wall of the guide rod, and the other end of the bottom of the positioning assembly is threadedly connected to the outer wall of the bidirectional lead screw.

[0012] Preferably, a rotating handle is rotatably connected to the side of the fastening base, the rotating handle is connected to the bidirectional lead screw, the opposite sides of the two positioning assemblies are symmetrically attached to the bottoms of both sides of the vacuum pump body, and universal wheels are symmetrically installed around the bottom of the fastening base.

[0013] Preferably, the movable column is movably connected in the inner cavity of the movable seat, the movable seat is movably connected in the inner cavity of the fastening base, reset grooves are symmetrically opened at both ends of the movable column, a fixing rod is installed in the inner cavity of the reset groove, and a spring is wound around the outer wall of the fixing rod.

[0014] Preferably, one end of the spring is installed at the bottom of the inner cavity of the reset groove, the opposite sides of the inner cavity of the movable seat are movably connected in the inner cavity of the reset groove and sleeved on the outer wall of the fixing rod, and the other end of the spring is installed at the movable seat.

[0015] Preferably, pedals are symmetrically and fixedly connected to the opposite sides of the left and right connecting columns, the movable seat penetrates through the centers of the connecting column and the suction cup, and the elasticity of the spring is less than the suction force of the suction cup.

[0016] Compared with the prior art, the present invention provides a device for avoiding the cavitation phenomenon of a vacuum pump, and has the following beneficial effects: 1. The device for preventing cavitation of the vacuum pump can effectively prevent cavitation of the vacuum pump body by adding a gas-liquid separator and a cavitation protection pipe at the vacuum pump body. After the vacuum pump body is started, the gas to be pumped enters the inner cavity of the vacuum pump body through the intake pipe, and the vacuum pump body starts to work, compressing the gas, which is then discharged through the exhaust pipe. The discharged gas and water droplets enter the gas-liquid separator. At this time, the gas is separated from the water, and the gas is discharged into the atmosphere through the intake pipe, while the water enters the inner cavity of the vacuum pump body through the hose. Based on this, the amount of working fluid in the inner cavity of the vacuum pump body can be increased, and the temperature of the working fluid can be reduced. Therefore, the temperature of the working fluid can be lowered and the amount of liquid vaporization can be reduced, thereby achieving the effect of preventing cavitation.

[0017] 2. The device for preventing cavitation of the vacuum pump installs a cavitation protection pipe at the gas-liquid separator and the vacuum pump body. When the bubbles generated during the cavitation process burst during compression, the non-condensable gas with a higher pressure introduced from the outside can timely fill the space formed by the bursting of the bubbles, which can greatly reduce the damage of cavitation to the vacuum pump body and reduce the noise and vibration caused by cavitation.

[0018] 3. The device for preventing cavitation of the vacuum pump can prevent cavitation of the vacuum pump body. At the same time, the temperature of the vacuum pump body can be significantly reduced during use, and both the maintenance frequency and maintenance cost can be significantly reduced.

[0019] 4. The device for preventing cavitation of the vacuum pump can drive the connecting shaft to rotate by engaging the first gear with the second gear by starting the set servo motor. After the connecting shaft rotates, it can drive the scraper and the first connecting gear to rotate simultaneously. The scraper can clean the inner wall of the gas-liquid separator. After the first connecting gear rotates, it can engage with the second connecting gear, enabling the stirring rod to rotate in the inner cavity of the gas-liquid separator. Based on this, the working efficiency of the gas-liquid separator can be improved. When the scraper rotates, it can drive the stirring rod to rotate in the inner cavity of the gas-liquid separator, so the processing range of the stirring rod can be increased.

[0020] 5. The device for preventing cavitation of the vacuum pump can drive the bidirectional lead screw to rotate by rotating the set turning handle, so that the bottom of the positioning component can be threadedly connected to it. Based on this, the positioning component can be driven to fasten the vacuum pump body. This structure can adapt to vacuum pump bodies of various sizes for installation and fastening. Through the set universal wheels, it is convenient to transfer the position of the vacuum pump body.

[0021] 6. The device for avoiding cavitation of the vacuum pump can be adsorbed to the ground through the provided suction cup. When the vacuum pump body is working, it can further reduce the shaking of the vacuum pump body and keep it in a static state. By pressing the provided fastening component, it can contact the ground through the movable column, so that the suction cup can quickly disengage from the ground. Therefore, the vacuum pump body can be quickly driven to move for work. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the whole invention; Figure 2 is a schematic structural diagram of the gas-liquid separator of the invention; Figure 3 is a schematic structural diagram of the connecting shaft of the invention; Figure 4 is a schematic structural diagram of the fastening base of the invention; Figure 5 is a schematic structural diagram of the fastening component of the invention.

[0023] In the figure: 1. Vacuum pump body; 2. Intake pipe; 3. Working fluid supply pipe; 4. Hose; 5. Exhaust pipe; 6. Cavitation protection pipe; 7. Gas-liquid separator; 8. Outlet pipe; 9. Servo motor; 10. First gear; 11. Second gear; 12. Connecting rod; 13. Connecting shaft; 14. First connecting gear; 15. Scraper; 16. Second connecting gear; 17. Stirring rod; 18. Fastening base; 19. Moving groove; 20. Guide rod; 21. Bidirectional lead screw; 22. Turning handle; 23. Positioning component; 24. Universal wheel; 25. Fastening component; 26. Movable column; 27. Reset groove; 28. Fixed rod; 29. Spring; 30. Movable seat; 31. Connecting column; 32. Suction cup; 33. Pedal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0025] Embodiment 1: As Figures 1 - 3As shown in the figure, a device for avoiding cavitation of a vacuum pump includes a vacuum pump body 1. An exhaust pipe 5 is installed on the left side of the vacuum pump body 1. A gas-liquid separator 7 is installed on the top of the exhaust pipe 5. A cavitation protection pipe 6 is installed on the front of the gas-liquid separator 7. A hose 4 is installed on the bottom of the gas-liquid separator 7. A working fluid supply pipe 3 is installed on the front of the vacuum pump body 1. An intake pipe 2 is installed on the right side of the vacuum pump body 1. The other end of the hose 4 is connected to the working fluid supply pipe 3. The other end of the exhaust pipe 5 is installed on the outer wall of the vacuum pump body 1. An outlet pipe 8 is installed on the top of the gas-liquid separator 7. A second gear 11 is rotatably connected to the top of the gas-liquid separator 7. A servo motor 9 is installed on the top of the gas-liquid separator 7. A first gear 10 is installed on the top of the servo motor 9 through a first rotating shaft. The first gear 10 meshes with the second gear 11. The second gear 11 is of a cavity structure. A connecting rod 12 is installed in the inner cavity of the second gear 11. The other end of the connecting rod 12 is installed with a connecting shaft 13. The connecting shaft 13 is rotatably connected in the inner cavity of the gas-liquid separator 7. A first connecting gear 14 is installed at the bottom of the connecting shaft 13. The first connecting gear 14 is rotatably connected to the bottom of the inner cavity of the gas-liquid separator 7. A scraping plate 15 is installed on the side of the connecting shaft 13. The outer wall of the scraping plate 15 is attached to the inner wall of the gas-liquid separator 7. A stirring rod 17 is rotatably connected in the inner cavity of the scraping plate 15. A second connecting gear 16 is installed at the bottom of the stirring rod 17. The second connecting gear 16 meshes with the first connecting gear 14; By adding a gas-liquid separator 7 and a cavitation protection pipe 6 at the vacuum pump body 1, the cavitation phenomenon of the vacuum pump body 1 can be effectively avoided. When the vacuum pump body 1 is started, the gas to be pumped enters the inner cavity of the vacuum pump body 1 through the intake pipe 2. The vacuum pump body 1 starts to work, compresses the gas, and then discharges it through the exhaust pipe 5. The discharged gas and water droplets enter the gas-liquid separator 7. At this time, the gas is separated from the water. The gas is discharged into the atmosphere through the intake pipe 2. The water enters the inner cavity of the vacuum pump body 1 through the hose 4. Based on this, the amount of the working fluid in the inner cavity of the vacuum pump body 1 can be increased, and the temperature of the working fluid can be reduced. Therefore, the temperature of the working fluid can be reduced and the liquid vaporization amount can be reduced, so as to achieve the effect of preventing cavitation. A cavitation protection pipe 6 is installed at the gas-liquid separator 7 and the vacuum pump body 1. When the bubbles generated during the cavitation process break during compression, the non-condensable gas with a higher pressure introduced from the outside can timely supplement the space formed due to the bubble breakage. In this way, the damage of cavitation to the vacuum pump body 1 can be greatly reduced, and the noise and vibration caused by cavitation can be reduced. The cavitation phenomenon of the vacuum pump body 1 can be avoided. At the same time, the temperature of the vacuum pump body 1 can be greatly reduced during use, and the maintenance frequency and maintenance cost can be greatly reduced.

[0026] Embodiment 2: As Figure 1 、 Figure 4 、 Figure 5As shown in the figure, a device for avoiding cavitation in a vacuum pump. At the bottom of the vacuum pump body 1, there is a fastening base 18. On both sides of the top of the fastening base 18, there are symmetrically and movably connected positioning components 23. Around the top of the fastening base 18, there are symmetrically and movably connected fastening components 25. At the bottom of the fastening component 25, there is a movable seat 30. At the bottom of the movable seat 30, there is a connecting column 31 installed. At the bottom of the connecting column 31, there is a suction cup 32 installed. At both ends of the top of the fastening base 18, there are symmetrically opened movable grooves 19. In the inner cavity of one movable groove 19, there is a guide rod 20 installed. In the inner cavity of the other movable groove 19, there is a bidirectional lead screw 21 rotatably connected. At both ends of the bottom of the positioning component 23, they are symmetrically and movably connected in the inner cavities of the two movable grooves 19. One end of the bottom of the positioning component 23 is sleeved on the outer wall of the guide rod 20. The other end of the bottom of the positioning component 23 is threadedly connected to the outer wall of the bidirectional lead screw 21. On the side of the fastening base 18, there is a rotating handle 22 rotatably connected. The rotating handle 22 is connected to the bidirectional lead screw 21. On the opposite sides of the two positioning components 23, they are symmetrically attached to the bottoms of both sides of the vacuum pump body 1. Around the bottom of the fastening base 18, there are symmetrically installed universal wheels 24. A movable column 26 is movably connected in the inner cavity of the movable seat 30. The movable seat 30 is movably connected in the inner cavity of the fastening base 18. At both ends of the movable column 26, there are symmetrically opened reset grooves 27. In the inner cavity of the reset groove 27, there is a fixed rod 28 installed. A spring 29 is wound around the outer wall of the fixed rod 28. One end of the spring 29 is installed at the bottom of the inner cavity of the reset groove 27. On the opposite sides of the inner cavity of the movable seat 30, they are movably connected in the inner cavity of the reset groove 27 and sleeved on the outer wall of the fixed rod 28. The other end of the spring 29 is installed at the movable seat 30. On the opposite sides of the connecting columns 31 on the left and right, there are symmetrically fixedly connected pedals 33; By starting the servo motor 9 set, it can be meshed with the second gear 11 through the first gear 10. At this time, the connecting rod 12 can drive the connecting shaft 13 to rotate. After the connecting shaft 13 rotates, it can drive the scraper 15 and the first connecting gear 14 to rotate at the same time. The scraper 15 can clean the inner wall of the gas-liquid separator 7. After the first connecting gear 14 rotates, it can be meshed with the second connecting gear 16, so that the stirring rod 17 can rotate in the inner cavity of the gas-liquid separator 7. Based on this, the working efficiency of the gas-liquid separator 7 can be improved. When the scraper 15 rotates, it can drive the stirring rod 17 to rotate in the inner cavity of the gas-liquid separator 7. Therefore, the processing range of the stirring rod 17 can be improved. By rotating the rotating handle 22 set, the bidirectional lead screw 21 can be driven to rotate, so that the bottom of the positioning component 23 can be threadedly connected thereto. Based on this, the positioning component 23 can be driven to fasten the vacuum pump body 1. This structure can adapt to vacuum pump bodies 1 of various sizes for installation and fastening. Through the universal wheels 24 set, it is convenient to transfer the position of the vacuum pump body 1. Through the suction cups 32 set, they can adsorb to the ground. When the vacuum pump body 1 works, the shaking of the vacuum pump body 1 can be further reduced, and it can be kept in a stationary state at the same time. By pressing the fastening component 25 set, the movable column 26 can contact the ground, so that the suction cups 32 can quickly disengage from the ground. Therefore, the vacuum pump body 1 can be quickly driven to move.

[0027] It should be noted that the present invention is a device for avoiding cavitation of the vacuum pump. When in use, the vacuum pump body 1 is started, and the gas to be pumped enters the inner cavity of the vacuum pump body 1 through the intake pipe 2. The vacuum pump body 1 starts to work, compresses the gas, and then discharges it through the exhaust pipe 5. The discharged gas and water droplets enter the gas-liquid separator 7. At this time, the gas is separated from the water. The gas is discharged into the atmosphere through the intake pipe 2, and the water enters the inner cavity of the vacuum pump body 1 through the hose 4. Based on this, the amount of working fluid in the inner cavity of the vacuum pump body 1 can be increased, and the temperature of the working fluid can be reduced. Therefore, the temperature of the working fluid can be reduced and the amount of liquid vaporization can be reduced, so as to achieve the effect of preventing cavitation. When the gas-liquid separator 7 works, the servo motor 9 is started to drive the first gear 10 to rotate, so that the first gear 10 is meshed with the second gear 11. Based on this, the connecting rod 12 drives the connecting shaft 13 to rotate. When the connecting shaft 13 rotates, it drives the first connecting gear 14 and the scraper 15 to rotate. The scraper 15 cleans the inner wall of the gas-liquid separator 7. The first connecting gear 14 is meshed with the second connecting gear 16. Based on this, the stirring rod 17 is driven to rotate. The stirring rod 17 stirs the materials in the inner cavity of the gas-liquid separator 7 to facilitate its quick separation. When the position of the vacuum pump body 1 needs to be transferred, it can be driven to move through the universal wheels 24. After moving to a suitable position, press the pedal 33 so that the connecting column 31 can drive the suction cup 32 to move downward until it adsorbs the ground. At this time, the vacuum pump body 1 can be fixed through the suction cup 32.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preventing cavitation in a vacuum pump, comprising a vacuum pump body (1), characterized in that: An exhaust pipe (5) is installed on the left side of the vacuum pump body (1), a gas-liquid separator (7) is installed on the top of the exhaust pipe (5), a cavitation protection pipe (6) is installed on the front of the gas-liquid separator (7), a hose (4) is installed on the bottom of the gas-liquid separator (7), and a working liquid supply pipe (3) is installed on the front of the vacuum pump body (1); A fastening base (18) is provided at the bottom of the vacuum pump body (1), positioning components (23) are symmetrically and movably connected to the two sides of the top of the fastening base (18), fastening components (25) are symmetrically and movably connected to the four sides of the top of the fastening base (18), a movable seat (30) is provided at the bottom of the fastening component (25), a connecting column (31) is installed at the bottom of the movable seat (30), and a suction cup (32) is installed at the bottom of the connecting column (31).

2. A device for avoiding cavitation in a vacuum pump according to claim 1, characterized in that: An air inlet pipe (2) is installed on the right side of the vacuum pump body (1), the other end of the hose (4) is connected to the working fluid supply pipe (3), the other end of the exhaust pipe (5) is installed on the outer wall of the vacuum pump body (1), and an air outlet pipe (8) is installed on the top of the gas-liquid separator (7).

3. The device for avoiding cavitation of a vacuum pump according to claim 1, characterized in that: The top of the gas-liquid separator (7) is rotatably connected to a second gear (11), a servo motor (9) is mounted on the top of the gas-liquid separator (7), a first gear (10) is mounted on the top of the servo motor (9) via a first rotating shaft, and the first gear (10) is meshed with the second gear (11).

4. The device for avoiding cavitation in a vacuum pump according to claim 3, characterized in that: The second gear (11) is a hollow structure, a connecting rod (12) is installed in the inner cavity of the second gear (11), a connecting shaft (13) is installed at the other end of the connecting rod (12), the connecting shaft (13) is rotatably connected in the inner cavity of the gas-liquid separator (7), a first connecting gear (14) is installed at the bottom of the connecting shaft (13), and the first connecting gear (14) is rotatably connected to the bottom of the inner cavity of the gas-liquid separator (7).

5. The device for avoiding cavitation of a vacuum pump according to claim 4, characterized in that: A scraper (15) is mounted on the side of the connecting shaft (13), the outer wall of the scraper (15) is in contact with the inner wall of the gas-liquid separator (7), a stirring rod (17) is rotatably connected in the inner cavity of the scraper (15), a second connecting gear (16) is mounted at the bottom of the stirring rod (17), and the second connecting gear (16) is meshed with the first connecting gear (14).

6. The device for preventing cavitation in a vacuum pump according to claim 1, characterized in that: The top ends of the fastening base (18) are symmetrically provided with movable grooves (19); a guide rod (20) is installed in the inner cavity of the movable groove (19) at one end; a bidirectional screw rod (21) is rotatably connected in the inner cavity of the movable groove (19) at the other end; the bottom ends of the positioning component (23) are symmetrically and movably connected in the inner cavities of the two movable grooves (19); one end of the bottom of the positioning component (23) is sleeved on the outer wall of the guide rod (20), and the other end of the bottom of the positioning component (23) is threadedly connected to the outer wall of the bidirectional screw rod (21).

7. The device for avoiding cavitation in a vacuum pump according to claim 1, characterized in that: The side of the fastening base (18) is rotatably connected to a rotating handle (22), the rotating handle (22) is connected to the bidirectional screw rod (21), the opposite sides of the two positioning components (23) are symmetrically attached to the bottom of the two sides of the vacuum pump body (1), and universal wheels (24) are symmetrically installed around the bottom of the fastening base (18).

8. The device for preventing cavitation in a vacuum pump according to claim 1, characterized in that: The movable column (26) is movably connected in the inner cavity of the movable seat (30), and the movable seat (30) is movably connected in the inner cavity of the fastening base (18). Reset grooves (27) are symmetrically provided at both ends of the movable column (26), and a fixing rod (28) is installed in the inner cavity of the reset groove (27). The outer wall of the fixing rod (28) is wound with a spring (29).

9. The device for avoiding cavitation in a vacuum pump according to claim 1, characterized in that: One end of the spring (29) is mounted on the bottom of the inner cavity of the reset groove (27); the opposite side of the inner cavity of the movable seat (30) is movably connected in the inner cavity of the reset groove (27) and sleeved on the outer wall of the fixed rod (28); the other end of the spring (29) is mounted on the movable seat (30).

10. The device for preventing cavitation of a vacuum pump according to claim 8, characterized in that: A pedal (33) is symmetrically fixedly connected to the opposite sides of the connecting columns (31) on the left and right sides. The movable seat (30) passes through the center of the connecting column (31) and the suction cup (32). The elasticity of the spring (29) is smaller than the suction force of the suction cup (32).

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