Variable-pitch screw vacuum pump

Abstract

The utility model discloses a variable-pitch screw vacuum pump which comprises a supporting frame, fixing feet, a driving box and a shell and further comprises a cold water tank arranged at the bottom end of the shell and an air inlet pipe connected to one end of the side face of the shell in an intercommunication mode, and an inner cavity of the driving box is detachably connected with a driving motor. The power output end of the driving motor is detachably connected with a first transmission rod, the first transmission rod penetrates through the driving box and extends into the shell, a variable-pitch screw is arranged in the shell, and one side of the variable-pitch screw is detachably connected with the power output end of the driving motor. By arranging the transmission structure, water in the cooling structure can be driven to flow when the pump body works, so that cooling water can be quickly cooled, the heat exchange effect of the pump body during cooling is ensured, the cooling effect of the pump body is effectively improved, and the service life of the pump body is prolonged.

Description

Technical Field

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

[0002] In today's industrial production, vacuum pumps are widely used. They can evacuate the connected equipment to form a specific working environment, which is conducive to material handling and production processing. Among the structures of vacuum pumps, the screw vacuum pump is widely used. The screw vacuum pump is a dry vacuum pump, which consists of a pair of mutually meshing main rotors that rotate synchronously and oppositely at high speed in a pump chamber composed of a pump body, an intake side middle wall, an exhaust side middle wall, etc., thereby forming a vacuum pumping device with suction, compression and exhaust functions.

[0003] The existing variable pitch screw vacuum pump will generate high temperature when using the gas compression, which will cause the temperature of the screw and pump body to be too high. Most of the pumps on the market use water cooling to cool the pump body. The cold water flows inside the pump body to achieve heat exchange to cool the pump body. However, during the long-term cooling process, the temperature of the water body will continue to rise, and the water body needs to reduce the temperature by dissipating heat by itself, but the cooling efficiency is low, thereby reducing the heat conduction efficiency of the water body during cooling, reducing the cooling effect of the pump body, and thus reducing the use effect of the vacuum pump. To this end, we propose a variable pitch screw vacuum pump. Utility Model Content

[0004] The main purpose of the utility model is to provide a variable pitch screw vacuum pump, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A variable pitch screw vacuum pump comprises a support frame, a fixed foot, a drive box and a shell, and also comprises a cold water tank arranged at the bottom end of the shell and an air inlet pipe interconnected with one end of the shell side, the inner cavity of the drive box is detachably connected to a drive motor, the power output end of the drive motor is detachably connected to a first transmission rod, and the first transmission rod penetrates the drive box and extends to the inside of the shell, a variable pitch screw is arranged inside the shell, and one side of the variable pitch screw is detachably connected to the power output end of the drive motor, a second transmission rod is arranged at the bottom end of the drive box, and one end of the second transmission rod penetrates the cold water tank and extends to the upper end inside the cold water tank, a transmission belt is sleeved on the surface of one end of the first transmission rod close to the drive motor, and the other end of the transmission belt is sleeved on the surface of one end of the second transmission rod, the second transmission rod is fixedly connected to a second transmission gear at one end of the cold water tank, a stirring plate is vertically rotated in the inner cavity of the cold water tank, a second driving gear is fixedly connected to the upper surface of the stirring plate, and the second driving gear is meshedly connected to the second transmission gear, and a semiconductor refrigeration plate is arranged on the inner side wall of the inner cavity of the cold water tank.

[0007] Furthermore, a dust plate is detachably connected to the outer surface of the air intake pipe, a driving rod is rotatably embedded in the center of the dust plate surface, cleaning plates are fixedly connected to both sides of the driving rod surface, and a first driving gear is fixedly connected to the end of the driving rod.

[0008] Furthermore, a first transmission gear is fixedly connected to an end surface of the first transmission rod close to the variable pitch screw, and the first transmission gear is meshingly connected to the first driving gear.

[0009] Furthermore, an air outlet pipe is interconnected on one side of the upper surface of the shell.

[0010] Furthermore, a liquid guide tube is interconnected at the upper end of one side of the shell, and a terminal end of the liquid guide tube is interconnected with the upper end of one side of the cold water tank.

[0011] Furthermore, a liquid suction pipe is interconnected at the bottom end of one side of the cold water tank relative to the liquid guiding pipe, and a terminal end of the liquid suction pipe passes through the shell and extends to the inside of the heat exchange cavity opened inside the shell.

[0012] Furthermore, a liquid suction pump is provided on one side of the cold water tank, and the liquid suction pump is interconnected with the liquid suction pipe.

[0013] Compared with the prior art, the utility model has the following beneficial effects: 1. The utility model cooperates with each other by arranging a water cooling box, a driving motor, a first transmission rod, a transmission belt, a second transmission rod, a second transmission gear, a second driving gear, a stirring plate and a semiconductor refrigeration plate. When the pump body is cooled by heat exchange through cold water, the driving motor that drives the variable pitch screw to rotate will drive the second transmission rod to rotate through the first transmission rod and the transmission belt. With the help of the rotation of the second transmission rod and the meshing connection between the second transmission gear and the second driving gear, the stirring plate in the cold water tank is driven to rotate, and then the cooling water in the cold water tank is stirred, so that the cooling water can fully contact with the semiconductor refrigeration plate, so that the cooling water can quickly cool down, and the heat exchange efficiency can be effectively improved when cooling the pump body, thereby improving the cooling effect, effectively protecting the pump body when it is in use, and improving The service life of the vacuum pump body; 2. The utility model sets a driving motor, a first transmission rod, a first transmission gear, a dustproof plate, a cleaning plate, a driving rod and a first driving gear to cooperate with each other. When the pump body is in use, the outside air enters the variable pitch screw inside the pump body through the air intake pipe and is compressed. In the air intake process, the dust in the air can be effectively filtered through the dustproof plate to prevent dust from entering the pump body and causing damage to the screw. At the same time, the driving rod that is meshed with the first transmission gear fixed on the first transmission rod through the first transmission gear will drive the cleaning plate on the surface of the dustproof plate to rotate, so as to clean the dust on the surface of the dustproof plate to prevent dust from being pushed on the surface of the dustproof plate and affecting the ventilation effect, so that the pump body can prevent dust and ensure the exhaust effect when exhausting air, which can not only improve the vacuum effect, but also effectively protect itself from damage and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic diagram of the overall structure of a variable pitch screw vacuum pump.

[0015] Figure 2 The utility model is a schematic structural diagram of a cross-sectional view of a pump body of a variable pitch screw vacuum pump.

[0016] Figure 3 The utility model is a schematic diagram of the structure of an air inlet pipe of a variable pitch screw vacuum pump.

[0017] In the figure: 1. support frame; 2. drive box; 3. shell; 4. air inlet pipe; 5. air outlet pipe; 6. liquid guide tube; 7. cold water tank; 8. fixed foot; 9. first transmission gear; 10. variable pitch screw; 11. drive motor; 12. first transmission rod; 13. transmission belt; 14. second transmission rod; 15. second transmission gear; 16. second drive gear; 17. stirring plate; 18. semiconductor refrigeration plate; 19. dustproof plate; 20. cleaning plate; 21. drive rod; 22. first drive gear. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] like Figure 1-3 As shown, a variable pitch screw vacuum pump comprises a support frame 1, a fixed foot 8, a drive box 2 and a shell 3, and also comprises a cold water tank 7 arranged at the bottom end of the shell 3 and an air inlet pipe 4 interconnected with one end of the side of the shell 3, the inner cavity of the drive box 2 is detachably connected to a drive motor 11, the power output end of the drive motor 11 is detachably connected to a first transmission rod 12, and the first transmission rod 12 penetrates the drive box 2 and extends to the inside of the shell 3, a variable pitch screw 10 is arranged inside the shell 3, and one side of the variable pitch screw 10 is detachably connected to the power output end of the drive motor 11, a second transmission rod 14 is arranged at the bottom end of the drive box 2, and one end of the second transmission rod 14 penetrates the cold water tank 7 and extends to the upper end inside the cold water tank 7, a transmission belt 13 is sleeved on the surface of one end of the first transmission rod 12 and close to the drive motor 11, and the other end of the transmission belt 13 is sleeved on the surface of one end of the second transmission rod 14, and the second A transmission rod 14 is located at one end of the cold water tank 7 and is fixedly connected to a second transmission gear 15. A stirring plate 17 is provided in the inner cavity of the cold water tank 7 for vertical rotation. A second driving gear 16 is fixedly connected to the upper end surface of the stirring plate 17, and the second driving gear 16 is meshingly connected to the second transmission gear 15. A semiconductor refrigeration plate 18 is provided on the inner side wall of the inner cavity of the cold water tank 7. The driving motor 11 that drives the variable pitch screw 10 to rotate will drive the second transmission rod 14 to rotate through the first transmission rod 12 and the transmission belt 13. The stirring plate 17 in the cold water tank 7 is driven to rotate by the rotation of the second transmission rod 14 and the meshing connection between the second transmission gear 15 and the second driving gear 16, thereby stirring the cooling water in the cold water tank 7, so that the cooling water can fully contact the semiconductor refrigeration plate 18, so that the cooling water can cool down quickly, which can effectively improve the heat exchange efficiency when cooling the pump body, thereby improving the cooling effect.

[0020] Among them, a dustproof plate 19 is detachably connected to the outer surface of the intake pipe 4, and a driving rod 21 is rotatably nested at the center position of the surface of the dustproof plate 19. Cleaning plates 20 are fixedly connected to both sides of the surface of the driving rod 21, and a first driving gear 22 is fixedly connected to the end of the driving rod 21. The first transmission rod 12 is fixedly connected to the surface of one end close to the variable pitch screw 10, and the first transmission gear 9 is meshingly connected with the first driving gear 22; the dust in the air can be effectively filtered through the dustproof plate 19 to prevent dust from entering the interior of the pump body and causing damage to the screw. At the same time, the driving rod 21 meshing with the first transmission gear 9 fixed on the first transmission rod 12 through the first transmission gear 9 will drive the cleaning plate 20 on the surface of the dustproof plate 19 to rotate, so as to clean the dust on the surface of the dustproof plate 19 to prevent dust from being pushed on the surface of the dustproof plate 19 and affecting the ventilation effect, so that the pump body can prevent dust while ensuring the exhaust effect when exhausting air.

[0021] Among them, an air outlet pipe 5 is interconnected on one side of the upper surface of the shell 3; the compressed air is conveniently discharged through the air outlet pipe 5.

[0022] Among them, the upper end of one side of the shell 3 is interconnected with a liquid guide tube 6, and the end of the liquid guide tube 6 is interconnected with the upper end of one side of a cold water tank 7. The cold water tank 7 is interconnected with a suction tube at the bottom end of one side relative to the liquid guide tube, and the end of the suction tube passes through the shell 3 and extends to the inside of the heat exchange chamber opened inside the shell 3; with the help of a suction pump at the bottom end of one side of the cold water tank 7, the water in the cold water tank 7 is sucked and transported into the heat exchange chamber inside the shell 3 through the suction tube, and then flows into the cold water tank 7 again from the liquid guide tube at the other end. The cooling water exchanges heat with the heat generated inside the shell 3 during the flow process, so as to avoid damage to internal components caused by excessive temperature inside the pump body, effectively ensuring the use effect of the vacuum pump while also effectively extending the service life of the vacuum pump body.

[0023] It should be noted that the utility model is a variable pitch screw vacuum pump. When working, the first transmission rod 12 is driven to rotate by the driving motor 11, thereby driving the variable pitch screw 10 in the shell 3 to rotate to compress the sucked air. In the compression process, the water in the cold water tank 7 is sucked by the suction pump at the bottom end of one side of the cold water tank 7 and transported into the heat exchange chamber inside the shell 3 through the suction pipe, and then flows back into the cold water tank 7 from the liquid guide pipe at the other end. The cooling water exchanges heat with the heat generated inside the shell 3 during the flow process, thereby avoiding damage to internal components caused by excessive temperature inside the pump body, effectively ensuring the use effect of the vacuum pump while also effectively extending the service life of the vacuum pump body.

[0024] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A variable pitch screw vacuum pump, comprising a support frame (1), a fixed foot (8), a drive box (2) and a housing (3), characterized in that: The invention also comprises a cold water tank (7) arranged at the bottom end of the shell (3) and an air inlet pipe (4) interconnected with one end of the side of the shell (3); the inner cavity of the drive box (2) is detachably connected to a drive motor (11); the power output end of the drive motor (11) is detachably connected to a first transmission rod (12), and the first transmission rod (12) passes through the drive box (2) and extends into the shell (3); a variable pitch screw (10) is arranged inside the shell (3), and one side of the variable pitch screw (10) is detachably connected to the power output end of the drive motor (11); a second transmission rod (14) is arranged at the bottom end of the drive box (2), and one end of the second transmission rod (14) passes through the cold water tank (7) and extends into the shell (3); The first transmission rod (12) extends to the upper end of the cold water tank (7), and a transmission belt (13) is sleeved on one end surface of the first transmission rod (12) close to the drive motor (11), and the other end of the transmission belt (13) is sleeved on one end surface of the second transmission rod (14), and the second transmission rod (14) is located at one end of the cold water tank (7) and is fixedly connected to a second transmission gear (15). The inner cavity of the cold water tank (7) is provided with a stirring plate (17) for vertical rotation, and the upper end surface of the stirring plate (17) is fixedly connected to a second drive gear (16), and the second drive gear (16) is meshingly connected to the second transmission gear (15), and the inner side wall of the inner cavity of the cold water tank (7) is provided with a semiconductor refrigeration plate (18).

2. A variable pitch screw vacuum pump according to claim 1, characterized in that: The outer surface of the air inlet pipe (4) is detachably connected to a dustproof plate (19), a driving rod (21) is rotatably embedded in the center of the surface of the dustproof plate (19), cleaning plates (20) are fixedly connected to both sides of the surface of the driving rod (21), and a first driving gear (22) is fixedly connected to the end of the driving rod (21).

3. A variable pitch screw vacuum pump according to claim 1, characterized in that: A first transmission gear (9) is fixedly connected to an end surface of the first transmission rod (12) close to the variable pitch screw (10), and the first transmission gear (9) is meshingly connected to the first driving gear (22).

4. A variable pitch screw vacuum pump according to claim 1, characterized in that: An air outlet pipe (5) is interconnected on one side of the upper surface of the shell (3).

5. The variable pitch screw vacuum pump according to claim 1, characterized in that: The upper end of one side of the shell (3) is interconnected with a liquid guide tube (6), and the end of the liquid guide tube (6) is interconnected with the upper end of one side of the cold water tank (7).

6. A variable pitch screw vacuum pump according to claim 1, characterized in that: The bottom end of the cold water tank (7) on one side relative to the liquid guiding tube (6) is interconnected with a liquid suction tube, and the end of the liquid suction tube passes through the shell (3) and extends to the inside of the heat exchange cavity opened inside the shell (3).

7. The variable pitch screw vacuum pump according to claim 1, characterized in that: A liquid suction pump is provided on one side of the cold water tank (7), and the liquid suction pump is interconnected with a liquid suction pipe.

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