Cone vacuum pump for conveying gas

Abstract

The invention belongs to the technical field of vacuum pumps, and particularly relates to a cone vacuum pump for conveying gas, which comprises a shell, a pump shaft rotatably connected in the shell, a first impeller mounted on the pump shaft, an adjusting pipe connected to a gas outlet pipe, a transverse plate fixed to the circumferential inner wall of the adjusting pipe, a screw rotatably connected to the transverse plate, and a threaded sleeve in threaded connection to the screw. The threaded sleeve is connected with the transverse plate through a limiting assembly, a sealing disc of a conical structure facing an outlet in the bottom end of the adjusting pipe is fixed to the bottom end of the threaded sleeve, the threaded sleeve is fixedly sleeved with a second bevel gear, a main shaft is rotationally connected to the circumferential face of the adjusting pipe, and the inner end of the main shaft is fixedly sleeved with a first bevel gear. And the first bevel gear is engaged with the second bevel gear. According to the device, the main shaft is rotated, then the main shaft is meshed with the second bevel gear through the first bevel gear to drive the screw to rotate, the threaded sleeve can move downwards, the sealing disc is gradually close to or away from the bottom end outlet of the adjusting pipe, and therefore the conveying flow is adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum pumps, and in particular to a cone vacuum pump for conveying gas. Background Art

[0002] The liquid ring vacuum pump is a vacuum pump that achieves vacuum pumping by periodically changing the volume of the working chamber through the rotation of the offset impeller in the pump chamber. Its working chamber is composed of a rotating liquid ring and an impeller, and its structure and working principle are similar to those of a liquid ring compressor. When working, the suction port is connected to the vacuum container to be evacuated.

[0003] The cone vacuum pump currently used to transport gas generally does not have the function of flow control and can only transport gas at a single flow rate. Therefore, corresponding improvements are made to address this problem. Summary of the invention

[0004] Based on the technical problems existing in the prior art, the present invention proposes a cone vacuum pump for conveying gas.

[0005] The present invention proposes a cone vacuum pump for conveying gas, comprising a shell, a pump shaft is rotatably connected in the shell, a first impeller located inside the shell is installed on the pump shaft, an air inlet pipe and an air outlet pipe are respectively arranged at two ends of the shell, an adjusting pipe is connected at the air outlet pipe, a horizontal plate is fixed on the circumferential inner wall of the adjusting pipe, a screw is rotatably connected on the horizontal plate, a threaded sleeve is threadedly connected on the screw, the threaded sleeve is connected to the horizontal plate through a limit assembly, a sealing disk of a cone structure facing the outlet of the bottom end of the adjusting pipe is fixed at the bottom end of the threaded sleeve, a second cone is fixedly sleeved on the threaded sleeve Gear, a main shaft is rotatably connected on the circumferential surface of the regulating tube, a first bevel gear is fixedly sleeved on the inner end of the main shaft, the first bevel gear is meshed and connected with the second bevel gear, when the delivery flow of the pump needs to be adjusted, only the main shaft needs to be rotated, and then the main shaft drives the screw to rotate through the first bevel gear meshing with the second bevel gear, and the threaded sleeve will move downward under the action of the screw, so that the sealing disk gradually approaches or moves away from the bottom outlet of the regulating tube, thereby adjusting the delivery flow, and the sealing disk with a conical structure can effectively reduce the fluid resistance, thereby making the adjustment process more labor-saving.

[0006] Preferably, the limiting assembly includes a guide sleeve fixed to the side of the threaded sleeve, a guide column is inserted into the guide sleeve, and the top of the guide column is fixedly connected to the cross plate. The threaded sleeve can be stably limited in the up and down directions through the guide sleeve and the guide column.

[0007] Preferably, a second impeller is fixedly sleeved on the main shaft, an air duct is fixedly passed through the bottom end of the regulating tube, the bottom end of the air duct extends into the bottom outlet of the regulating tube, the top end of the air duct is a U-shaped tube formed by the first pipe and the second pipe, the U-shaped tube is located below the second impeller, and gate valve assemblies are provided on the first pipe and the second pipe. When the main shaft rotates forward, the main shaft will synchronously drive the second impeller to rotate. At this time, the gate valve assembly on the first pipe will be opened, and a part of the gas will enter the air duct and then flow out from the first pipe and blow toward the second impeller, so as to assist the forward rotation of the main shaft. Conversely, when the main shaft rotates reversely, the gas will blow from the second pipe to the second impeller, thereby assisting the reverse rotation of the main shaft, so that the adjustment process can be more labor-saving.

[0008] Preferably, the gate valve assembly includes a gate plate, a socket is opened on the first pipe and the second pipe, the gate plate is inserted in the socket, a circular hole is opened at one end of the gate plate, a guide rod is inserted under the gate plate, a spring is sleeved on the guide rod, the two ends of the spring are respectively fixedly connected to the gate plate and the U-shaped tube, and the gate plate is also connected to a pushing assembly. When the main shaft rotates in the forward direction, the gate plate on the first pipe will be periodically pushed by the pushing assembly. When the circular hole on the gate plate coincides with the first pipe, the first pipe will be periodically opened. Conversely, when the main shaft rotates in the reverse direction, the second pipe will be periodically opened.

[0009] Preferably, the pushing assembly includes a pair of sleeves fixedly sleeved on the U-shaped tube, and a push plate 1 is slidably connected to the sleeve, and the push plate 1 abuts against the end of the gate plate through an inclined surface, and the adjacent ends of the two push plates 1 are provided with force blocks that can rotate in one direction and can contact the blades of the second impeller. When the blades rotate forward, they will first contact the force blocks on the second pipe, and the force blocks on the second pipe will be deflected. Then the blades will contact the force blocks on the first pipe, and the force blocks on the first pipe cannot be deflected. At this time, the push plate 1 on the first pipe will move outward, and then the push plate 1 will push the gate plate. Conversely, when the blades rotate in the opposite direction, they will push the gate plate on the second pipe.

[0010] Preferably, a stopper 1 is provided on the top of the push plate 1 and can be parallel to the force-bearing block. A rotating shaft passing through the force-bearing block is fixed on the top of the push plate 1. The force-bearing block and the rotating shaft are connected by a coil spring. Restricted by the stopper 1, the push plate 1 can rotate in one direction, and the coil spring can be used to reset the push plate 1 to its initial state.

[0011] Preferably, the pushing assembly includes a first synchronous wheel located below the main shaft, the first synchronous wheel is rotatably connected to the adjusting tube through a shaft column, and two groups of symmetrically distributed push plates 2 that can rotate in one direction are arranged on a side of the first synchronous wheel close to the U-shaped tube, and multiple push plates 2 in the same group are distributed in a circular array, and the push plates 2 can contact the ends of the gate plates through the inclined surfaces at the ends, and the first synchronous wheel is connected to the main shaft through a transmission assembly. When the main shaft rotates forward, the first synchronous wheel will be driven to rotate forward through the transmission assembly, and then the two gate plates will be contacted respectively through the two push plates 2. At this time, the push plate 2 in contact with the gate plate on the first pipe cannot rotate, so that the push plate 2 will push the gate plate through the inclined surface, and the other push plate 2 is just opposite to it, so that the first pipe can be opened during forward rotation, and the second pipe can be opened during reverse rotation.

[0012] Preferably, the transmission assembly includes a second synchronous wheel fixedly mounted on the main shaft, and the second synchronous wheel is connected to the first synchronous wheel by a synchronous belt, so that the rotation of the first synchronous wheel can be achieved through the synchronous belt and the second synchronous wheel, and the diameter of the second synchronous wheel is smaller than the first synchronous wheel, so that after the second synchronous wheel can be controlled to rotate multiple circles to achieve the effect of regulating the flow, the rotation range of the first synchronous wheel is within half a circle.

[0013] Preferably, the push plate 2 is rotationally connected with the first synchronous wheel through an axle seat, and a stopper 2 is provided below the push plate 2 and can be parallel to the bottom surface of the push plate 2. The stopper 2 is fixed on the first synchronous wheel, and the push plate 2 can be restricted by the stopper 2 so that it can rotate in one direction.

[0014] Compared with the prior art, the present invention provides a cone vacuum pump for conveying gas, which has the following beneficial effects: 1. A conical vacuum pump for conveying gas, by setting a sealing disk, when it is necessary to adjust the conveying flow of the pump, it is only necessary to rotate the main shaft, and then the main shaft drives the screw to rotate through the first bevel gear engaging the second bevel gear, and the threaded sleeve will move downward under the action of the screw, so that the sealing disk gradually approaches or moves away from the bottom outlet of the regulating tube, thereby adjusting the conveying flow, and the sealing disk with a conical structure can effectively reduce the fluid resistance, so that the adjustment process is more labor-saving.

[0015] 2. A conical vacuum pump for conveying gas, by setting a gate valve assembly, when the main shaft rotates forward, the main shaft will synchronously drive the second impeller to rotate, at this time the gate valve assembly on the first pipeline will be opened, a part of the gas will enter the air duct and then flow out from the first pipeline and blow to the second impeller, thus assisting the forward rotation of the main shaft, conversely, when the main shaft rotates reversely, the gas will blow from the second pipeline to the second impeller, thereby assisting the reverse rotation of the main shaft, thus making the adjustment process more labor-saving.

[0016] 3. A conical vacuum pump for conveying gas, which has a gate plate. When the main shaft rotates in the forward direction, the gate plate on the first pipe will be periodically pushed by the pushing component. When the circular hole on the gate plate coincides with the first pipe, the first pipe will be periodically opened. Conversely, when the main shaft rotates in the reverse direction, the second pipe will be periodically opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a cone vacuum pump for transporting gas proposed by the present invention; Figure 2 A partial cross-sectional structural schematic diagram of a cone vacuum pump for transporting gas proposed by the present invention; Figure 3 This is a schematic diagram of the internal structure of a regulating tube of a cone vacuum pump for transporting gas proposed in Example 1 of the present invention; Figure 4 This is a schematic diagram of the air duct structure of a cone vacuum pump for transporting gas proposed by the present invention; Figure 5 A schematic diagram of the installation structure between the second impeller, the push plate 1 and the gate plate of a conical vacuum pump for conveying gas proposed by the present invention; Figure 6 A schematic diagram of the structure of a push plate of a cone vacuum pump for conveying gas proposed by the present invention; Figure 7 This is a schematic diagram of the internal structure of a regulating tube of a cone vacuum pump for transporting gas proposed in Example 2 of the present invention; Figure 8 The present invention is a schematic diagram of the installation structure between the first synchronous wheel and the air bleed pipe of a conical vacuum pump for conveying gas.

[0018] In the figure: 1. casing; 2. pump shaft; 3. air inlet pipe; 4. air outlet pipe; 5. regulating pipe; 6. cross plate; 7. screw; 8. threaded sleeve; 9. sealing disk; 10. main shaft; 11. first bevel gear; 12. second bevel gear; 13. guide sleeve; 14. guide column; 15. air duct; 16. first pipeline; 17. second pipeline; 18. socket; 19. round hole; 20. gate; 21. guide rod; 22. spring; 23. second impeller; 24. blade; 25. sleeve; 26. push plate one; 27. force block; 28. stopper one; 29. ​​rotating shaft; 30. shaft column; 31. first synchronous wheel; 32. stopper two; 33. shaft seat; 34. push plate two; 35. second synchronous wheel; 36. synchronous belt. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] Reference Figure 1-Figure 8 A conical vacuum pump for conveying gas comprises a shell 1, a pump shaft 2 is rotatably connected in the shell 1, a first impeller located inside the shell 1 is installed on the pump shaft 2, an air inlet pipe 3 and an air outlet pipe 4 are respectively arranged at both ends of the shell 1, an adjusting pipe 5 is connected to the air outlet pipe 4, a horizontal plate 6 is fixed to the circumferential inner wall of the adjusting pipe 5, a screw rod 7 is rotatably connected to the horizontal plate 6, a threaded sleeve 8 is threadedly connected to the screw rod 7, the threaded sleeve 8 is connected to the horizontal plate 6 through a limit assembly, a sealing disk 9 of a conical structure facing the outlet of the bottom end of the adjusting pipe 5 is fixed at the bottom end of the threaded sleeve 8, a second bevel gear 12 is fixedly sleeved on the threaded sleeve 8, and the adjusting pipe 5 is provided with a plurality of conical sealing discs 9, each of which ... A main shaft 10 is rotatably connected to the circumferential surface of the section pipe 5, and a first bevel gear 11 is fixedly sleeved on the inner end of the main shaft 10. The first bevel gear 11 is meshed and connected with the second bevel gear 12. When the delivery flow of the pump needs to be adjusted, it is only necessary to rotate the main shaft 10, and then the main shaft 10 drives the screw 7 to rotate through the first bevel gear 11 meshing with the second bevel gear 12. Under the action of the screw 7, the threaded sleeve 8 will move downward, so that the sealing disk 9 gradually approaches or moves away from the bottom outlet of the regulating tube 5, thereby adjusting the delivery flow. The sealing disk 9 with a conical structure can effectively reduce the fluid resistance, thereby making the adjustment process more labor-saving.

[0022] Furthermore, the limiting assembly includes a guide sleeve 13 fixed to the side of the threaded sleeve 8, a guide column 14 is inserted into the guide sleeve 13, and the top of the guide column 14 is fixedly connected to the cross plate 6. The threaded sleeve 8 can be stably limited in the up and down directions through the guide sleeve 13 and the guide column 14.

[0023] Furthermore, a second impeller 23 is fixedly sleeved on the main shaft 10, an air duct 15 is fixedly passed through the bottom end of the regulating tube 5, and the bottom end of the air duct 15 extends into the bottom outlet of the regulating tube 5. The top end of the air duct 15 is a U-shaped tube formed by a first pipe 16 and a second pipe 17. The U-shaped tube is located below the second impeller 23. Gate valve assemblies are provided on the first pipe 16 and the second pipe 17. When the main shaft 10 rotates forward, the main shaft 10 will synchronously drive the second impeller 23 to rotate. At this time, the gate valve assembly on the first pipe 16 will be opened, and a part of the gas will enter the air duct 15 and then flow out from the first pipe 16 and blow toward the second impeller 23, so as to assist the forward rotation of the main shaft 10. Conversely, when the main shaft 10 rotates reversely, the gas will blow from the second pipe 17 to the second impeller 23, thereby assisting the reverse rotation of the main shaft 10, so as to make the adjustment process more labor-saving.

[0024] Furthermore, the gate valve assembly includes a gate plate 20, and a socket 18 is provided on the first pipe 16 and the second pipe 17. The gate plate 20 is inserted into the socket 18. A circular hole 19 is provided at one end of the gate plate 20. A guide rod 21 is inserted below the gate plate 20, and a spring 22 is sleeved on the guide rod 21. The two ends of the spring 22 are respectively fixedly connected to the gate plate 20 and the U-shaped tube. The gate plate 20 is also connected to a pushing component. When the main shaft 10 rotates forward, the gate plate 20 on the first pipe 16 will be periodically pushed by the pushing component. When the circular hole 19 on the gate plate 20 coincides with the first pipe 16, the first pipe 16 will be periodically opened. Conversely, when the main shaft 10 rotates reversely, the second pipe 17 will be periodically opened.

[0025] Furthermore, the pushing assembly includes a pair of sleeves 25 fixedly sleeved on the U-shaped tube, and a push plate 26 is slidably connected to the sleeve 25. The push plate 26 abuts against the end of the gate plate 20 through an inclined surface. The adjacent ends of the two push plates 26 are provided with a force block 27 that can rotate in one direction and can contact the blade 24 of the second impeller 23. When the blade 24 rotates forward, it will first contact the force block 27 on the second pipe 17, and the force block 27 on the second pipe 17 will deflect. Then the blade 24 will contact the force block 27 on the first pipe 16, and the force block 27 on the first pipe 16 cannot deflect. At this time, the push plate 26 on the first pipe 16 will move outward, and then the push plate 26 will push the gate plate 20. Conversely, when the blade 24 rotates in the opposite direction, it will push the gate plate 20 on the second pipe 17.

[0026] Furthermore, a stopper 28 capable of being parallel to the force-bearing block 27 is provided on the top of the push plate 26, and a rotating shaft 29 passing through the force-bearing block 27 is fixed on the top of the push plate 26. The force-bearing block 27 and the rotating shaft 29 are connected by a coil spring. Restricted by the stopper 28, the push plate 26 can rotate in one direction, and the push plate 26 can be reset to its initial state by the coil spring.

[0027] Furthermore, the pushing assembly includes a first synchronous wheel 31 located below the main shaft 10, and the first synchronous wheel 31 is rotatably connected to the adjusting tube 5 through the shaft column 30. Two groups of symmetrically distributed push plates 34 that can rotate in one direction are arranged on one side of the first synchronous wheel 31 close to the U-shaped tube. Multiple push plates 34 of the same group are distributed in a ring array, and the push plates 34 can contact the end of the gate plate 20 through the inclined surface at the end. The first synchronous wheel 31 is connected to the main shaft 10 through the transmission assembly. When the main shaft 10 rotates forward, the first synchronous wheel 31 will be driven to rotate forward through the transmission assembly, and then the two gate plates 20 will be contacted respectively through the two push plates 34. At this time, the push plate 34 contacting the gate plate 20 on the first pipe 16 cannot rotate, so that the push plate 34 will push the gate plate 20 through the inclined surface, and the other push plate 34 is just opposite to it, so that the first pipe 16 can be opened during forward rotation, and the second pipe 17 can be opened during reverse rotation.

[0028] Furthermore, the transmission assembly includes a second synchronous wheel 35 fixedly mounted on the main shaft 10, and the second synchronous wheel 35 and the first synchronous wheel 31 are connected by a synchronous belt 36, so that the rotation of the first synchronous wheel 31 can be achieved through the synchronous belt 36 and the second synchronous wheel 32, and the diameter of the second synchronous wheel 35 is smaller than the first synchronous wheel 31, so that the second synchronous wheel 35 can be controlled to rotate multiple circles to achieve the effect of regulating the flow, and the rotation range of the first synchronous wheel 31 is within half a circle.

[0029] Furthermore, the push plate 34 is rotationally connected with the first synchronous wheel 31 through the shaft seat 33, and a stopper 32 is provided below the push plate 34 to be parallel to the bottom surface of the push plate 34. The stopper 32 is fixed on the first synchronous wheel 31, and the push plate 34 can be restricted by the stopper 32 so that it can rotate in one direction.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A conical vacuum pump for conveying gas, comprising a housing (1), characterized in that: A pump shaft (2) is rotatably connected inside the housing (1), a first impeller located inside the housing (1) is mounted on the pump shaft (2), an air inlet pipe (3) and an air outlet pipe (4) are respectively provided at two ends of the housing (1), an adjusting pipe (5) is connected to the air outlet pipe (4), a transverse plate (6) is fixed to the circumferential inner wall of the adjusting pipe (5), a screw rod (7) is rotatably connected to the transverse plate (6), a threaded sleeve (8) is threadedly connected to the screw rod (7), the threaded sleeve (8) is connected to the transverse plate (6) via a limit assembly, a sealing disk (9) with a conical structure facing the outlet at the bottom end of the adjusting pipe (5) is fixed at the bottom end of the threaded sleeve (8), a second bevel gear (12) is fixedly sleeved on the threaded sleeve (8), a main shaft (10) is rotatably connected to the circumferential surface of the adjusting pipe (5), a first bevel gear (11) is fixedly sleeved on the inner end of the main shaft (10), and the first bevel gear (11) is meshingly connected to the second bevel gear (12); A second impeller (23) is fixedly sleeved on the main shaft (10); an air bleed pipe (15) is fixedly passed through the bottom end of the regulating pipe (5); the bottom end of the air bleed pipe (15) extends into the bottom end outlet of the regulating pipe (5); the top end of the air bleed pipe (15) is a U-shaped pipe formed by a first pipe (16) and a second pipe (17); the U-shaped pipe is located below the second impeller (23); and gate valve assemblies are provided on the first pipe (16) and the second pipe (17).

2. A cone vacuum pump for conveying gas according to claim 1, characterized in that: The limit assembly comprises a guide sleeve (13) fixed to the side of the threaded sleeve (8), a guide column (14) being inserted into the guide sleeve (13), and a top end of the guide column (14) being fixedly connected to the horizontal plate (6).

3. A cone vacuum pump for conveying gas according to claim 1, characterized in that: The gate valve assembly comprises a gate plate (20), a first pipe (16) and a second pipe (17) are both provided with a socket (18), the gate plate (20) is inserted into the socket (18), a round hole (19) is provided at one end of the gate plate (20), a guide rod (21) is inserted below the gate plate (20), a spring (22) is sleeved on the guide rod (21), two ends of the spring (22) are respectively fixedly connected to the gate plate (20) and the U-shaped pipe, and the gate plate (20) is also connected to a pushing assembly.

4. A cone vacuum pump for conveying gas according to claim 3, characterized in that: The pushing assembly comprises a pair of sleeve frames (25) fixedly sleeved on the U-shaped tube, a push plate (26) being slidably connected to the sleeve frame (25), the push plate (26) being in contact with the end of the gate plate (20) via an inclined surface, and a force bearing block (27) capable of unidirectional rotation and contacting the blades (24) of the second impeller (23) being provided at the adjacent ends of the two push plates (26).

5. A cone vacuum pump for conveying gas according to claim 4, characterized in that: A stopper block (28) capable of being parallel to the force-bearing block (27) is provided on the top of the push plate (26); a rotating shaft (29) passing through the force-bearing block (27) is fixed on the top of the push plate (26); the force-bearing block (27) and the rotating shaft (29) are connected via a coil spring.

6. A cone vacuum pump for conveying gas according to claim 3, characterized in that: The pushing assembly comprises a first synchronous wheel (31) located below the main shaft (10), the first synchronous wheel (31) being rotatably connected to the regulating tube (5) via the shaft column (30), two groups of symmetrically distributed push plates (34) capable of unidirectional rotation being arranged on one side of the first synchronous wheel (31) close to the U-shaped tube, a plurality of push plates (34) in the same group being distributed in a ring array, the push plates (34) being capable of contacting the end of the gate plate (20) via the inclined surface at the end, and the first synchronous wheel (31) being connected to the main shaft (10) via the transmission assembly.

7. A cone vacuum pump for conveying gas according to claim 6, characterized in that: The transmission assembly comprises a second synchronous wheel (35) fixedly sleeved on the main shaft (10); the second synchronous wheel (35) and the first synchronous wheel (31) are connected via a synchronous belt (36).

8. A cone vacuum pump for conveying gas according to claim 6, characterized in that: The push plate 2 (34) is rotatably connected to the first synchronous wheel (31) via the shaft seat (33); a stopper 2 (32) capable of being parallel to the bottom surface of the push plate 2 (34) is provided below the push plate 2 (34); the stopper 2 (32) is fixed on the first synchronous wheel (31).

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