CN114658635B - High-efficient vacuum pump unit - Google Patents
High-efficient vacuum pump unit Download PDFInfo
- Publication number
- CN114658635B CN114658635B CN202210338913.9A CN202210338913A CN114658635B CN 114658635 B CN114658635 B CN 114658635B CN 202210338913 A CN202210338913 A CN 202210338913A CN 114658635 B CN114658635 B CN 114658635B
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- Prior art keywords
- vacuum pump
- pipe
- cooling liquid
- sliding block
- liquid inlet
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- 239000000110 cooling liquid Substances 0.000 claims abstract description 94
- 238000009434 installation Methods 0.000 claims description 24
- 238000007789 sealing Methods 0.000 claims description 17
- 230000000694 effects Effects 0.000 abstract description 12
- 239000002826 coolant Substances 0.000 description 19
- 239000007788 liquid Substances 0.000 description 11
- 238000001816 cooling Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011197 physicochemical method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/06—Combinations of two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/14—Provisions for readily assembling or disassembling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The application relates to a high-efficiency vacuum pump unit which comprises a first vacuum pump and a second vacuum pump, wherein an air outlet of the first vacuum pump is communicated with an air inlet of the second vacuum pump through a connecting pipe; the vacuum pump further comprises a bottom frame, and the first vacuum pump and the second vacuum pump are both fixed on the bottom frame. The air outlet of the first vacuum pump is higher than the air inlet of the second vacuum pump, the air inlet of the first vacuum pump is connected with a first cooling liquid inlet, the air outlet of the second vacuum pump is connected with a cooling liquid outlet, and the first cooling liquid inlet is used for cooling liquid to enter the first vacuum pump. Through setting up first vacuum pump and second vacuum pump, and fix first vacuum pump and second vacuum pump through the chassis each other, make the extreme vacuum degree of vacuum pump unit improve on the one hand, improve the evacuation effect, on the other hand reduces the dislocation vibrations of first vacuum pump and second vacuum pump, makes first vacuum pump and second vacuum pump operation more stable.
Description
Technical Field
The application relates to the technical field of vacuum pumps, in particular to a high-efficiency vacuum pump unit.
Background
The vacuum pump is a device or equipment for pumping the pumped container by using mechanical, physical, chemical or physicochemical methods to obtain vacuum, namely the vacuum pump is a device for improving, generating and maintaining vacuum in a certain enclosed space by using various methods, the rotation of the inner rotor in the pump cavity generates volume change to discharge gas out of the pump, mainly in the process of air suction, the volume of the air suction cavity is increased, the vacuum degree is reduced, the gas in the container is sucked into the pump cavity, the volume is reduced in the process of air discharge, the pressure is increased, and finally the sucked gas is discharged out of the pump. The vacuum degree of the vacuum pump in the related technology is not high, the pumping quantity is small, and the working efficiency of the vacuum pump is seriously affected.
Disclosure of Invention
In order to improve the working efficiency of a vacuum pump, the application provides a high-efficiency vacuum pump unit.
The application provides a high-efficiency vacuum pump unit, which adopts the following technical scheme:
The high-efficiency vacuum pump unit comprises a first vacuum pump and a second vacuum pump, wherein an air outlet of the first vacuum pump is communicated with an air inlet of the second vacuum pump through a connecting pipe; the vacuum pump further comprises a bottom frame, and the first vacuum pump and the second vacuum pump are both fixed on the bottom frame.
Through adopting above-mentioned technical scheme, establish ties first vacuum pump and second vacuum pump, improve the extreme vacuum degree of vacuum pump for the vacuum pump unit has better evacuation effect. The first vacuum pump and the second vacuum pump are both fixed on the underframe, so that the relevance of the first vacuum pump and the second vacuum pump is higher, dislocation vibration generated when the first vacuum pump and the second vacuum pump work is reduced, the connecting pipe is not easy to loosen, the first vacuum pump and the second vacuum pump are enabled to work stably, and good air extraction speed is kept.
Optionally, the gas outlet of the first vacuum pump is higher than the gas inlet of the second vacuum pump, the gas inlet of the first vacuum pump is connected with a first cooling liquid inlet, the gas outlet of the second vacuum pump is connected with a cooling liquid outlet, and the first cooling liquid inlet is used for cooling liquid to enter the first vacuum pump.
Through adopting above-mentioned technical scheme, be higher than the air inlet setting of second vacuum pump with the gas outlet of first vacuum pump and make the coolant liquid conveniently shift to the second vacuum pump from first vacuum pump, first vacuum pump and the second vacuum pump of series arrangement produce a large amount of heat easily, through setting up first coolant liquid import and coolant liquid outlet, conveniently cool off first vacuum pump and second vacuum pump through the coolant liquid, the life of extension first vacuum pump and second vacuum pump.
Optionally, a second cooling liquid inlet is arranged on the connecting pipe.
By adopting the technical scheme, the cooling liquid enters the first cooling liquid inlet to cool the first vacuum pump, and then the temperature rises, so that the cooling effect on the second vacuum pump is poor. Through set up the second coolant inlet on the connecting pipe, the coolant liquid that gets into from the second coolant inlet lacks the second vacuum pump for the cooling effect of second vacuum pump is better. If more cooling liquid is introduced into the first cooling liquid inlet at one time, the work of the first vacuum pump is easily influenced; through adding the coolant liquid twice, and the position selection of second time interpolation is on the connecting pipe for the coolant liquid is difficult for influencing first vacuum pump and second vacuum pump work, still improves the cooling effect of second vacuum pump simultaneously.
Optionally, a control structure for controlling the opening and closing of the second cooling liquid inlet is arranged at the second cooling liquid inlet; the control structure comprises a mounting pipe and a sliding block in the mounting pipe, wherein the length direction of the mounting pipe is vertical, the sliding block is arranged in the mounting pipe in a sliding manner, and the sliding direction of the sliding block is vertical; a connecting port is arranged on the side wall of the mounting pipe and used for allowing cooling liquid to enter the mounting pipe;
the sliding block is positioned between the second cooling liquid inlet and the connecting port, and blocks the second cooling liquid inlet and the connecting port; when the sliding block slides upwards, the sliding block is positioned at one side of the connecting port far away from the second cooling liquid inlet, and the sliding block is used for communicating the second cooling liquid inlet with the connecting port.
By adopting the technical scheme, when the vacuum pump unit does not work, the sliding block is positioned between the second cooling liquid inlet and the connecting port through self gravity, so that the second cooling liquid inlet and the connecting port are blocked, and cooling liquid cannot be added into the connecting pipe; the cooling liquid at the second cooling liquid inlet is kept to enter the mounting tube through external pressurization, when the vacuum pump unit works, the pressure in the connecting tube is large, the sliding block is jacked up by the large pressure, and the sliding block slides to the upper part of the connecting port, so that the second cooling liquid inlet is communicated with the connecting port, and at the moment, the second cooling liquid inlet can enter the connecting port, and the effect that the second cooling liquid inlet can be automatically opened when the vacuum pump unit works is realized;
When the pressure in the connecting pipe is high, the first vacuum pump and the second vacuum pump are in a normal working state, at the moment, the cooling liquid in the connecting pipe from the first cooling liquid inlet has a certain acceleration, at the moment, the second cooling liquid inlet is opened, so that the cooling liquid entering from the second cooling liquid inlet is easily accelerated in a short time, and when the cooling liquid reaches the second vacuum pump, the accelerated cooling liquid is not easy to influence the working of the second vacuum pump;
The opening of the connecting port is controlled by the sliding distance of the sliding block, so that when the pressure in the connecting pipe is smaller, the sliding distance of the sliding block is smaller, the opening of the connecting port is smaller, the amount of the cooling liquid entering the connecting pipe is smaller, and the liquid in the connecting pipe can be accelerated conveniently; the amount of the newly added cooling liquid is controlled through the pressure intensity in the connecting pipe, so that the cooling liquid can be sufficiently accelerated, and the influence of the cooling liquid on the operation of the second vacuum pump is reduced.
Optionally, the sliding block is circumferentially provided with a first sealing ring, and the circumferential outer wall of the first sealing ring is in sliding sealing contact with the inner wall of the mounting tube.
Through adopting above-mentioned technical scheme, through setting up first sealing ring, improve the sealed effect of sliding block outer wall and installation pipe inner wall, when making the vacuum pump unit not work, the difficult weeping that takes place of second coolant liquid import department.
Optionally, a limiting part for limiting the sliding distance of the sliding block is arranged in the mounting pipe.
Through adopting above-mentioned technical scheme, through setting up the sliding distance of spacing sliding block of locating part, make the sliding distance of sliding block in the installation tube be difficult for too big for the sliding block is located the position that is close to the connector all the time, makes things convenient for the sliding block to reset.
Optionally, the locating part includes at least one guide bar and two coaxial locating rings that set up, the length direction of guide bar is parallel with the axis of locating ring, two the locating ring passes through the guide bar to be connected fixedly, set up the guiding hole that supplies the guide bar to pass on the sliding block, guide bar outer wall and guiding hole inner wall sliding contact.
By adopting the technical scheme, the sliding block is conveniently jacked up from the center of the limiting rings by adopting the two limiting rings to limit, so that the sliding block can conveniently slide; the sliding block slides between the two limiting rings, and the limiting rings limit the sliding block to a position close to the connecting port, so that the opening and closing of the connecting port can be conveniently controlled after the sliding block slides; the guide rod is used for connecting and fixing the two limiting rings, the guide rod also penetrates through the multiple guide holes, the guide rod has a guide effect on the sliding block, and the sliding stability of the sliding block is improved.
Optionally, the limiting piece is slidably arranged in the mounting pipe, and a positioning piece for positioning the position of the limiting piece is arranged on the mounting pipe; the positioning piece comprises a moving block which is positioned at the end part of the installation pipe far away from the connecting pipe, the end part of the installation pipe far away from the connecting pipe is communicated with the outside, the moving block is arranged in the connecting pipe in a sliding manner, and a limiting ring far away from the connecting pipe is fixed on the moving block;
The installation pipe is connected with a branch pipe, the branch pipe is connected to one side of the connecting port, which is close to the connecting pipe, and the end part of the branch pipe, which is far away from the installation pipe, is connected with the connecting pipe;
when the moving block slides, the two limiting rings slide and drive the sliding block to slide; when the two limiting rings slide to the first position, the sliding block is positioned between the second cooling liquid inlet and the connecting port or positioned at one side of the connecting port far away from the second cooling liquid inlet;
when two spacing rings are located the second position, the sliding block is located the branch pipe and keeps away from one side of connector, branch pipe, installation pipe, connector communicate in proper order, second coolant inlet and installation pipe block.
Through adopting above-mentioned technical scheme, through setting up the branch pipe, the branch pipe supplies the interior gas of connecting pipe to get into in the installation tube. The movable block is positioned at the top end of the installation tube, and the movable block seals the top end of the installation tube. The locating piece slides and then drives the limiting piece to slide, and the sliding block always slides between the two limiting rings, so that the sliding position of the sliding block is changed. When the limiting rings slide in the mounting pipe to a first position, the connecting ports are positioned between the two limiting rings, the sliding blocks are positioned between the second cooling liquid inlet and the connecting ports through self gravity of the sliding blocks under the action of no external force, at the moment, the connecting ports are separated from the second cooling liquid inlet, and cooling liquid is not easy to enter the mounting pipe from the second cooling liquid inlet; when the vacuum pump unit works, the pressure in the connecting pipe is increased, the sliding block is jacked up, the sliding block is positioned at one side of the connecting port far away from the second cooling liquid inlet, at the moment, the connecting port is communicated with the second cooling liquid inlet, and the cooling liquid can be connected with the pipe at the present time;
When the locating part is located the second position, the spacing ring of connecting pipe is located the junction of branch pipe and installation pipe and is close to one side of connecting pipe, and the sliding block must also be located the junction of branch pipe and installation pipe and is close to one side of connecting pipe this moment, and the sliding block is with second coolant inlet shutoff, branch pipe, installation pipe and connector intercommunication in proper order, and the coolant liquid can get into in the installation pipe in proper order this moment and continuously get into in the connecting pipe through the branch pipe for at the vacuum pump unit when not working, the coolant liquid also can get into the cooling of connecting pipe to the second vacuum pump.
Optionally, the circumferential side wall of the moving block is provided with a protruding piece, and the inner wall of the mounting pipe is provided with two grooves for accommodating the protruding piece;
When the protruding piece is positioned in the groove far away from the connecting pipe, the two limiting rings are positioned at the first position; when the protruding piece is positioned in the groove close to the connecting pipe, the two limiting rings are positioned at the second position.
Through adopting above-mentioned technical scheme, through setting up recess and bulge, conveniently fix a position the sliding position of movable block, when the movable block is located the position of two different recesses, the locating part is located first position or second position, conveniently fixes a position the position of locating part.
Optionally, a second sealing ring is arranged on the circumferential side wall of the moving block, and the moving block is in sliding sealing contact with the inner wall of the mounting tube through the second sealing ring.
Through adopting above-mentioned technical scheme, the setting of second sealing ring makes the movable block better to the sealed effect on installation tube top.
In summary, the present application includes at least one of the following beneficial technical effects:
1. The first vacuum pump and the second vacuum pump are arranged and mutually fixed through the underframe, so that the ultimate vacuum degree of the vacuum pump unit is improved, the vacuumizing effect is improved, the dislocation vibration of the first vacuum pump and the second vacuum pump is reduced, and the first vacuum pump and the second vacuum pump are more stable in operation;
2. Through setting the first cooling liquid inlet, the second cooling liquid inlet, the mounting pipe and the control structure, the cooling liquid is added for two times, so that the cooling liquid is not easy to influence the operation of the first vacuum pump and the second vacuum pump, and the cooling effect of the second vacuum pump is improved;
3. by arranging the locating piece, the sliding stability of the sliding block is improved.
Drawings
Fig. 1 is a partial cross-sectional view of an embodiment of the present application within a mounting tube of a vacuum pump assembly.
Fig. 2 is an enlarged view of fig. 1 at a, mainly showing the structure of the stopper at the first position.
Fig. 3 is a schematic structural view of the stopper in the second position according to the embodiment.
Reference numerals illustrate: 1. a chassis; 2. a first vacuum pump; 3. a second vacuum pump; 4. a connecting pipe; 41. a second coolant inlet; 5. a first coolant inlet; 6. a cooling liquid outlet; 7. a limiting piece; 71. a limiting ring; 72. a guide rod; 822. a guide hole; 8. a control structure; 81. installing a pipe; 811. a connection port; 812. a branch pipe; 82. a sliding block; 821. a first seal ring; 9. a positioning piece; 91. a moving block; 911. a second seal ring; 92. a connecting rod; 93. a projection; 931. rubber bumps; 94. a chute; 95. a groove.
Detailed Description
The application is described in further detail below with reference to fig. 1-3.
The embodiment of the application discloses a high-efficiency vacuum pump unit. Referring to fig. 1, the high-efficiency vacuum pump unit includes a chassis 1, a first vacuum pump 2 and a second vacuum pump 3, the first vacuum pump 2 is a roots vacuum pump, and the second vacuum pump 3 is a slide valve vacuum pump. The first vacuum pump 2 and the second vacuum pump 3 are fixed on the underframe 1, the position height Gao Dudi of the first vacuum pump 2 is equal to the position height of the second vacuum pump 3, and the position height of the air outlet of the second vacuum pump 3 is higher than the position height of the air inlet of the second vacuum pump 3. The air outlet of the first vacuum pump 2 is communicated with the air inlet of the second vacuum pump 3 through a connecting pipe 4.
Referring to fig. 1, a first cooling liquid inlet 5 is formed at an air inlet of the first vacuum pump 2, and a cooling liquid outlet 6 for discharging cooling liquid is formed at an air outlet of the second vacuum pump 3.
Referring to fig. 2, a second cooling liquid inlet 41 is formed on the connecting pipe 4, and a control structure 8 for controlling the opening and closing of the second cooling liquid inlet 41 is arranged at the second cooling liquid inlet 41. The control structure 8 includes a mounting tube 81, the mounting tube 81 being fixed to the second coolant inlet 41, the length direction of the mounting tube 81 being the vertical direction. The top end of the mounting pipe 81 is in a closed state, and the bottom end of the mounting pipe 81 is communicated with the connecting pipe 4 through the second cooling liquid inlet 41.
Referring to fig. 2, a connection port 811 is formed in the middle of the installation tube 81, the connection port 811 is used for connecting a pipe through which the coolant passes through the connection port 811, the installation tube 81 and the second coolant inlet 41 in order, and enters the connection tube 4.
Referring to fig. 2, a branch pipe 812 is connected to the middle of the installation pipe 81, the branch pipe 812 is connected to a side of the connection port 811 near the connection pipe 4, and an end of the branch pipe 812 far from the installation pipe 81 is connected to the connection pipe 4. The end of the branch pipe 812 remote from the mounting pipe 81 is connected to the side of the second cooling liquid inlet 41 close to the first vacuum pump 2. The branch pipe 812 is inclined, and an end of the branch pipe 812 is inclined away from the connecting pipe 4 in a direction in which the gas in the connecting pipe 4 flows, and an end of the branch pipe 812 away from the connecting pipe 4 is fixed to the mounting pipe 81.
Referring to fig. 2, the control structure 8 further includes a sliding block 82 in the mounting tube 81, the sliding direction of the sliding block 82 being along the length direction of the mounting tube 81, the circumferential outer wall of the sliding block 82 being in sliding sealing contact with the inner wall of the mounting tube 81 by providing a first sealing ring 821.
Referring to fig. 2, when the sliding block 82 is not subject to external force, the sliding block 82 is located at a side of the connection part of the branch pipe 812 and the mounting pipe 81 away from the connecting pipe 4 by its own weight, and the sliding block 82 is also located at a side of the connection port 811 near the connecting pipe 4, at this time, the sliding block 82 separates the connection port 811 from the branch pipe 812 and the second cooling liquid inlet 41, so that the cooling liquid is not easy to enter the connecting pipe 4.
Referring to fig. 2, when the vacuum pump unit is operated, the pressure in the connection pipe 4 increases, the pressure pushes the sliding block 82 to slide upward, so that the sliding block 82 slides to a side of the connection port 811 away from the connection pipe 4, and at this time, the connection port 811 communicates with the connection pipe 4 through the second cooling liquid inlet 41 and the branch pipe 812, and the cooling liquid can smoothly enter the connection pipe 4.
Referring to fig. 2, a limiting member 7 for limiting the sliding movement of the sliding block 82 is slidably connected in the mounting tube 81, the limiting member 7 includes two coaxially disposed limiting rings 71 and two guide rods 72, the two limiting rings 71 are fixedly connected by the two guide rods 72, the length direction of the two guide rods 72 is parallel to the axis of the limiting rings 71, and the two guide rods 72 are distributed on both sides of the axis of the limiting rings 71.
Referring to fig. 2, a sliding block 82 is slidably disposed between the two limiting rings 71, and a guide hole 822 through which the guide rod 72 passes is formed in the sliding block 82, and the guide rod 72 is in sliding contact with an inner wall of the guide hole 822.
Referring to fig. 2, a positioning member 9 for positioning the limiting member 7 is further slidably connected in the mounting tube 81, the positioning member 9 includes a moving block 91 and two connecting rods 92, the moving block 91 is slidably disposed at an end portion of the mounting tube 81 far away from the connecting rods 92, a moving direction of the moving block 91 is along a length direction of the mounting tube 81, and the moving block 91 plugs a top end of the mounting tube 81. The moving block 91 has a peripheral side wall in sliding sealing contact with the inner wall of the mounting tube 81 by providing a second seal ring 911.
Referring to fig. 2, the moving block 91 and the stop collar 71 far from the connection pipe 4 are spaced apart, and the moving block 91 and the stop collar 71 are fixed by the connection rod 92, and the connection rod 92 is located at both sides of the axis of the stop collar 71.
Referring to fig. 2, the moving block 91 is fixed with protrusions 93 at opposite sides, the protrusions 93 are rubber bumps 931, and the rubber bumps 931 have a certain setting and toughness, and a certain deformability. The inner wall of the mounting pipe 81 is provided with a sliding groove 94 for sliding the rubber convex block 931, the depth of the sliding groove 94 is smaller than the length of the rubber convex block 931 protruding out of the surface of the sliding block 82, the same sliding groove 94 is internally provided with two grooves 95 for the rubber convex block 931 to enter, and the arrangement direction of the two grooves 95 is the same as the moving direction of the moving block 91.
Referring to fig. 2, when the moving block 91 slides to the position where the rubber projection 931 is located in the groove 95 away from the connection pipe 4, the stopper 7 is displaced to the first position, the sliding block 82 is located on the stopper ring 71 close to the connection pipe 4 by its own weight, at this time, the connection port 811 is located on the side of the sliding block 82 away from the connection pipe 4, and the communication point of the branch pipe 812 and the installation pipe 81 is located on the side of the sliding block 82 close to the connection pipe 4; when the vacuum pump unit works, the pressure in the connecting pipe 4 is enhanced, and after the pressure drives the sliding block 82 to slide upwards, the connecting port 811 is positioned on one side of the sliding block 82 close to the connecting pipe 4, so that cooling liquid can enter the connecting pipe 4.
Referring to fig. 3, when the moving block 91 slides to the position where the rubber bump 931 is located in the groove 95 near the connecting pipe 4, the limiting member 7 is located at the second position, at this time, the connection point between the branch pipe 812 and the mounting pipe 81 is located between the limiting ring 71 far from the connecting pipe 4 and the moving block 91, and the connection port 811 is also located between the limiting ring 71 far from the connecting pipe 4 and the moving block 91, so that the connection port 811 is communicated with the connecting pipe 4 through the branch pipe 812, and when the vacuum pump unit does not need to work, the cooling liquid can also enter the connecting pipe 4, so as to facilitate continuous cooling of the second vacuum pump 3.
The implementation principle of the high-efficiency vacuum pump unit provided by the embodiment of the application is as follows: the first vacuum pump 2 and the second vacuum pump 3 work simultaneously, and a container for placing cooling liquid is connected at the first cooling liquid inlet 5 and the connecting port 811 through a pipeline; when the vacuum pump unit starts to work, the limiting piece 7 is positioned at the first position, and at the moment, only the first cooling liquid inlet 5 is filled with cooling liquid; when the pressure in the connecting pipe 4 rises to a certain level, the pressure drives the sliding block 82 to slide upwards, so that the connecting port 811 and the branch pipe 812 are positioned on the same side of the sliding block 82, and at the moment, the cooling liquid sequentially enters the connecting pipe 4 through the connecting port 811, the mounting pipe 81 and the second cooling liquid inlet 41; or the cooling liquid sequentially passes through the connecting port 811, the mounting pipe 81 and the branch pipe 812 and enters the connecting pipe 4, so that the second cooling liquid inlet 41 and the second cooling liquid inlet 41 are simultaneously filled with the cooling liquid, and the cooling liquid is filled into the vacuum pump unit twice, so that the cooling liquid is not easy to influence the operation of the vacuum pump unit.
When maintenance is needed or the second vacuum pump 3 is hot, the limiting piece 7 can be slid to the second position, the sliding block 82 is kept at one side of the connection part of the branch pipe 812 and the installation pipe 81, which is close to the connecting pipe 4, and the connection port 811, the installation pipe 81 and the branch pipe 812 are kept continuously communicated, so that cooling liquid can continuously enter the connecting pipe 4 to cool the second vacuum pump 3.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (4)
1. The utility model provides a high-efficient vacuum pump unit which characterized in that: the device comprises a first vacuum pump (2) and a second vacuum pump (3), wherein an air outlet of the first vacuum pump (2) is communicated with an air inlet of the second vacuum pump (3) through a connecting pipe (4); the vacuum pump also comprises a bottom frame (1), wherein the first vacuum pump (2) and the second vacuum pump are both fixed on the bottom frame (1);
The air outlet of the first vacuum pump (2) is higher than the air inlet of the second vacuum pump (3), the air inlet of the first vacuum pump (2) is connected with a first cooling liquid inlet (5), the air outlet of the second vacuum pump (3) is connected with a cooling liquid outlet (6), and the first cooling liquid inlet (5) is used for supplying cooling liquid into the first vacuum pump (2);
a second cooling liquid inlet (41) is formed in the connecting pipe (4);
A control structure (8) for controlling the opening and closing of the second cooling liquid inlet (41) is arranged at the second cooling liquid inlet (41); the control structure (8) comprises a mounting pipe (81) and a sliding block (82) in the mounting pipe (81), the length direction of the mounting pipe (81) is vertical, the sliding block (82) is arranged in the mounting pipe (81) in a sliding mode, and the sliding direction of the sliding block (82) is vertical; a connecting port (811) is formed in the side wall of the mounting pipe (81), and the connecting port (811) is used for allowing cooling liquid to enter the mounting pipe (81);
The sliding block (82) is positioned between the second cooling liquid inlet (41) and the connecting port (811), and the sliding block (82) blocks the second cooling liquid inlet (41) and the connecting port (811); after the pressure in the connecting pipe (4) drives the sliding block (82) to slide upwards, the sliding block (82) is positioned at one side of the connecting port (811) far away from the second cooling liquid inlet (41), and the sliding block (82) is used for communicating the second cooling liquid inlet (41) with the connecting port (811);
a limiting piece (7) for limiting the sliding distance of the sliding block (82) is arranged in the mounting pipe (81);
The limiting piece (7) comprises at least one guide rod (72) and two coaxially arranged limiting rings (71), the length direction of the guide rod (72) is parallel to the axis of the limiting rings (71), the two limiting rings (71) are fixedly connected through the guide rod (72), a guide hole (822) for the guide rod (72) to pass through is formed in the sliding block (82), and the outer wall of the guide rod (72) is in sliding contact with the inner wall of the guide hole (822);
The limiting piece (7) is arranged in the mounting pipe (81) in a sliding mode, and a positioning piece (9) used for positioning the position of the limiting piece (7) is arranged on the mounting pipe (81); the positioning piece (9) comprises a moving block (91) which is positioned at the end part of the mounting pipe (81) far away from the connecting pipe (4), the end part of the mounting pipe (81) far away from the connecting pipe (4) is communicated with the outside, the moving block (91) is arranged in the connecting pipe (4) in a sliding manner, and a limiting ring (71) far away from the connecting pipe (4) is fixed on the moving block (91);
A branch pipe (812) is connected to the mounting pipe (81), the branch pipe (812) is connected to one side of the connecting port (811) close to the connecting pipe (4), and the end part of the branch pipe (812) far away from the mounting pipe (81) is connected with the connecting pipe (4);
When the moving block (91) slides, the two limiting rings (71) slide and drive the sliding block (82) to slide; when the two limit rings (71) slide to the first position, the sliding block (82) slides between a position between the end of the branch pipe (812) far from the connecting pipe (4) and the connecting port (811) and a position on the side of the connecting port (811) far from the second cooling liquid inlet (41);
When the two limiting rings (71) are positioned at the second position, the limiting ring (71) far away from the connecting pipe (4) is positioned at one side, close to the connecting pipe (4), of the joint of the branch pipe (812) and the mounting pipe (81); the sliding block (82) is located on one side, far away from the connecting port (811), of the branch pipe (812), the mounting pipe (81) and the connecting port (811) are sequentially communicated, and the second cooling liquid inlet (41) is blocked with the mounting pipe (81).
2. The high efficiency vacuum pump assembly of claim 1, wherein: the sliding block (82) is circumferentially provided with a first sealing ring (821), and the circumferential outer wall of the first sealing ring (821) is in sliding sealing contact with the inner wall of the installation tube (81).
3. The high efficiency vacuum pump assembly of claim 1, wherein: the circumferential side wall of the moving block (91) is provided with a protruding piece (93), and the inner wall of the mounting pipe (81) is provided with two grooves (95) for accommodating the protruding piece (93);
when the protruding piece (93) is positioned in the groove (95) far away from the connecting pipe (4), the two limiting rings (71) are positioned at the first position; when the protruding member (93) is positioned in the groove (95) close to the connecting tube (4), both of said stop rings (71) are in the second position.
4. The high efficiency vacuum pump assembly of claim 1, wherein: the second sealing ring (911) is arranged on the circumferential side wall of the moving block (91), and the moving block (91) is in sliding sealing contact with the inner wall of the mounting tube (81) through the second sealing ring (911).
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| JP2000345981A (en) * | 1999-06-03 | 2000-12-12 | Morita Econos Ltd | Multistage root's type vacuum pump suction device |
| CN108499764A (en) * | 2018-06-02 | 2018-09-07 | 上海华立电子工程有限公司 | Piston atomizer |
| CN214145903U (en) * | 2020-12-28 | 2021-09-07 | 叶家琴 | Two-stage compression vacuum pump device |
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| KR101474239B1 (en) * | 2013-07-12 | 2014-12-18 | (주)월드이엔씨 | Safety valve for absorption type cooling and heating apparatus |
| CN104196615B (en) * | 2014-08-15 | 2017-05-10 | 潍柴动力股份有限公司 | Engine cooling system and filtering device thereof |
| CN105841397B (en) * | 2016-04-06 | 2018-02-16 | 广州万宝集团民权电器有限公司 | pressure constant temperature cold water hot water production system |
| CN205744443U (en) * | 2016-06-30 | 2016-11-30 | 上海万经泵业制造有限公司 | A kind of biodiesel distillation Roots's liquid ring vacuum unit |
| US20200040895A1 (en) * | 2018-07-31 | 2020-02-06 | Raymond Zhou Shaw | Multistage power saving vacuum device with root vacuum pump in first stage |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000345981A (en) * | 1999-06-03 | 2000-12-12 | Morita Econos Ltd | Multistage root's type vacuum pump suction device |
| CN108499764A (en) * | 2018-06-02 | 2018-09-07 | 上海华立电子工程有限公司 | Piston atomizer |
| CN214145903U (en) * | 2020-12-28 | 2021-09-07 | 叶家琴 | Two-stage compression vacuum pump device |
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