CN207500079U - Vacuum pump - Google Patents
Vacuum pump Download PDFInfo
- Publication number
- CN207500079U CN207500079U CN201721290175.6U CN201721290175U CN207500079U CN 207500079 U CN207500079 U CN 207500079U CN 201721290175 U CN201721290175 U CN 201721290175U CN 207500079 U CN207500079 U CN 207500079U
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- valve
- fixed
- shell
- vacuum pump
- piston
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Abstract
The utility model discloses a kind of vacuum pump, including main casing, dual-axle motor, connecting leg and two extraction sectors, extraction sector includes shell, cylinder, piston, valve plate, upper valve, lower valve, head cover and piston rod, cylinder is fixed on shell end, piston is set in cylinder, valve plate is fixed on shell and opens up the first valve opening and the second valve opening, and upper valve is respectively arranged on valve plate top surface, bottom surface with lower valve and seals the first valve opening, the second valve opening.The top surface of piston sets a groove corresponding with lower valve position, head cover is fixed on valve plate, two extraction sectors are respectively arranged in the both ends of main casing, and the output shaft at dual-axle motor both ends is respectively protruding into two extraction sectors and drives extraction sector, and connecting leg is connected between two head covers.Piston-top surface sets groove in this vacuum pump, therefore the groove can accommodate lower valve when lower valve deformation is opened, and lower valve is made not strike piston, significantly reduces the risk of the noise and structural failure in the vacuum pump course of work.
Description
Technical field
The utility model is related to the vacuum pumps that vacuum pump technology field more particularly to a kind of valve will not hit piston.
Background technology
Vacuum pump refers to be obtained to being evacuated by pumping container using machinery, physics, chemically or physically chemical method
The device or equipment of vacuum are widely used in the industries such as metallurgy, chemical industry, food, electronics plated film.The type of vacuum pump is numerous
It is more, according to the difference of structural principle, it generally can be divided into rotary-vane vaccum pump and reciprocating vacuum pump.Wherein reciprocating vacuum pump is again
Referred to as piston type vacuum pump, the core component of piston type vacuum pump are the motors of two extraction sectors and driving extraction sector.Often
One extraction sector includes shell and the cylinder, piston and the piston rod that are set in shell, and valve plate, valve plate are fixed on shell
Be equipped with valve opening and deformable valve, when piston slides up and down in cylinder air pressure drive valve deformation so as to open valve
Hole.
In general, the quantity of valve opening is two on valve plate, and passes through two valves and be sealed respectively, wherein a valve
At the top of the valve plate, another valve is set on valve plate bottom, when piston stroking upward at the top of valve plate deformation open, when descent of piston
The valve deformation of bottom is opened.The vacuum pump of this structure exists in actual use to be had problems that：When piston has just started
During downlink, due to being formed with pressure differential between another extraction sector, ambient pressure higher than pressure in piston, make bottom valve to
Under deform upon opening, easily lead to valve and strike on piston, and currently used valve is usually sheet metal, valve is to work
The shock of plug can generate noise, and structure can be caused centainly to damage.
To solve the above problems, it is necessary to provide a kind of vacuum pumps that valve can be avoided to tap piston.
Utility model content
The purpose of this utility model is to provide a kind of vacuum pumps that valve can be avoided to tap piston.
To achieve these goals, the utility model provides a kind of vacuum pump, including main casing, dual-axle motor, connecting leg
And two extraction sectors, the extraction sector include shell, cylinder, piston, valve plate, upper valve, lower valve, head cover and piston
Connecting rod, the shell are fixed on described main casing one end, and the cylinder is fixed on the shell upper end, and the piston is set on described
In cylinder, the valve plate is fixed on the shell and opens up the first valve opening and the second valve opening, and the upper valve is fixed on described
Valve plate top surface and the first valve opening described in unidirectional blocking, the lower valve are fixed on second described in the valve plate bottom surface and unidirectional blocking
Valve opening, the top surface of the piston set a groove corresponding with the lower valve position, and the head cover is fixed on the valve plate,
Two extraction sectors are respectively arranged in the both ends of the main casing, and the output shaft at the dual-axle motor both ends is respectively protruding into two institutes
It states in extraction sector and drives the extraction sector, the connecting leg is connected between two head covers.
Compared with prior art, due to being provided with and lower valve position in the top surface of piston in the vacuum pump of the utility model
Corresponding groove, therefore the groove can accommodate lower valve when lower valve deformation is opened, and lower valve is made not strike piston,
Significantly reduce the risk of the noise and structural failure in the vacuum pump course of work.
Preferably, the shell includes lower housing and the upper shell that is fixed on the lower housing, the two of the lower housing
End is respectively provided with open front and after-opening, and the upper end opening of the upper shell, the cylinder is fixed in the upper shell, described
The gap that the side setting of upper shell is connected with the open front, the lower end of the piston rod are located in the lower housing, institute
The upper end for stating piston rod is stretched into the upper shell and is fixed with the piston.
Specifically, the lower housing and upper shell are cylindrical.
Specifically, the upper shell is an integral molding structure with lower housing.
Preferably, the shell further includes the fan cover for being fixed on the lower housing and covering the open front.
Preferably, being provided with sealing ring between the valve plate and head cover, first valve opening and the second valve opening are positioned at described
In the range that sealing ring surrounds.
Specifically, the valve plate is equipped with locating slot, and the sealing ring is positioned in the locating slot.
Preferably, the extraction sector further includes a cam, the cam is fixed with the output shaft, the piston rod
Lower end be connected to the cam.
Preferably, the extraction sector further includes the radiator fan for being fixed on the output shaft end.
It is fixed preferably, the shell of two extraction sectors is connected by screw rod.
Description of the drawings
Fig. 1 is the stereogram of the utility model vacuum pump.
Fig. 2 is the side view of vacuum pump.
Fig. 3 is the explosive view of vacuum pump.
Fig. 4 is the explosive view of extraction sector in vacuum pump.
Fig. 5 is the schematic diagram after extraction sector piston rod is detached from shell in Fig. 4.
Fig. 6 is the stereogram of valve plate and valve in extraction sector.
Fig. 7 is the schematic diagram after upper valve, lower valve are removed from valve plate.
Specific embodiment
Description is made to the preferred embodiment of the utility model with reference to the Figure of description provided.
As shown in Figure 1 to Figure 3, the utility model provides a kind of vacuum pump, including main casing 1, dual-axle motor 2, connecting leg 3
And two extraction sector 4.Two extraction sectors 4 are respectively arranged in the both ends of main casing 1, and dual-axle motor 2 is set to main casing 1
In, two output shafts 21 at 2 both ends of dual-axle motor are respectively protruding into two extraction sectors 4 and respectively drive two extraction sectors
4 operatings.Connecting leg 3 is connected between the upper end of two extraction sectors 4 to realize the air circulation between two extraction sectors 4.It should
Extraction sector 4 extracts air from container to be evacuated and is discharged to the outside, two air exhauster in the course of work during vacuum pump work
Structure shares alternately taking out, being vented into and out of stomata on a wherein head cover 46.After extraction sector 4 is fixed in 1 end of main casing,
Several screw rods 5 can be used to be connected between the shell of two extraction sectors 4, so as to strengthen the integrally-built fastness of vacuum pump.
The structure of two extraction sectors 4 is identical, is introduced below with regard to the concrete structure of an extraction sector 4.
With reference to Fig. 3 to Fig. 5, extraction sector 4 includes shell, cylinder 42, piston 43, valve plate 44, upper valve 451, lower valve
452nd, head cover 46, piston rod 47, cam 48 and radiator fan 49.Wherein shell is the architecture basics of extraction sector 4, for it
Its component is installed.
Shell includes lower housing 40 and the upper shell 41 being fixed on lower housing 40, and upper shell 41 and lower housing 40 are substantially
For cylindrical shape, upper shell 41 and lower housing 40 are integrated formed structures.The both ends of lower housing 40 are respectively provided with open front 401 with after
Opening 402, wherein after-opening 402 towards another extraction sector 4 and open front 401 towards the outside of vacuum pump, dual-axle motor 2
Output shaft 21 is extend into from after-opening 402 in shell.The upper end opening of upper shell 41.The side setting and open front of upper shell 41
The peripheral wall of upper shell 41 is disconnected, is seen in the cross section in horizontal plane, upper shell 41 by the gap 411 of 401 connections, the gap 411
Arc and incomplete continuous circle is presented.Piston rod 47 is encased in by open front 401 and above-mentioned gap 411 in shell,
Piston 43 is fixed to 47 top of piston rod, and cylinder 42 is inserted in piston from upper end, between the two slidably to keep sealing with merging,
And it is fixed in upper shell 41.Piston rod 47 is socketed on cam 48, and the lower end of piston rod 47 is located in lower housing 40, convex
Wheel 48 is also set in lower housing 40 and is fixed with output shaft 21, and piston 43 can be driven by piston rod 47 when cam 48 rotates
It is slided above and below in cylinder 42.Valve plate 44 is fixed on upper shell 41 and is formed between the peripheral wall of cylinder 42 and is tightly connected, top
Lid 46 is fixed on valve plate 44 and head cover 46 is the bowl-type of inner hollow.
Fig. 6, Fig. 7 are combined on the basis of Fig. 5, the top surface of valve plate 44 is equipped with the locating slot 441 of " day " font and passes through
The first valve opening 442 put, the second valve opening 443 are worn, " day " font locating slot 441 crosses two circles, the first valve opening 442 and second
Valve opening 443 is located at respectively in the two circles.Be equipped with a sealing ring 4a between head cover 46 and valve plate 44, the shape of sealing ring 4a regard with
Corresponding " day " font of locating slot 441, sealing ring 4a, which is positioned in locating slot 441 and is clamped, is pressed in head cover 46 and valve plate 44
Between.By setting sealing ring 4a between head cover 46 and valve plate 44, it can prevent the first valve opening 442, the second valve opening 443 from pushing up
It leaks air between lid 46 and valve plate 44.
Upper valve 451 is set on the top surface of valve plate 44, and one end and the valve plate 44 of upper valve 451 fix, upper valve 451 it is another
End is pressed at the first valve opening 442 downwards thus by 442 close encapsulation of the first valve opening.Lower valve 452 is set on the bottom surface of valve plate 44,
One end of lower valve 452 is fixed with valve plate 44, and the other end of lower valve 452 is pressed at the second valve opening 443 upwards so as to by the
Two valve openings, 443 close encapsulation.Upper valve 451 and lower valve 452 are deformable sheet metals.
A groove 431 is equipped with 452 corresponding position of lower valve in 43 top surface of piston, groove 431 is located at the side of piston 43
At edge.When the uplink in cylinder 42 of piston 43, lower valve 452 is pressed on valve plate 44, and the second valve opening 443 is closed, and on
Valve 451 is driven deformation by positive pressure, is opened with upper 451 corresponding first valve opening 442 of valve.Under piston 43 is in cylinder 42
During row, upper valve 451 is pressed on valve plate 44, and the first valve opening 442 is closed, and lower valve 452 then downward deformation with open the
Two valve openings 443, the end of the lower valve 452 after deformation can be extend into the groove 431 of 43 top surface of piston, but not with piston 43
Contact, will not more strike on piston 43.
Radiator fan 49, which is set on, turns the tip of the axis, and radiator fan 49 is rotated when output shaft 21 rotates, so as to by vacuum
The heat directed outwards generated in pump.Shell further includes a fan cover 4b, and fan cover 4b is fixed on lower housing 40 and by open front
401 cover in that human hand is protected not contact with radiator fan 49.
In this programme there are two the quantity of connecting leg 3, two connecting legs 3 are connected between the head cover 46 of two extraction sectors 41, and are protected
Hold connection.Several pipelines are additionally provided on head cover 46, by import of two extraction sectors 4 by same head cover 46 and appearance to be evacuated
Device connection, gas outlet are connected with external environment, and the setting direction of cam 48 is on the contrary, when dual-axle motor 2 starts in two extraction sectors 4
Piston 43 in the cylinder of latter two extraction sector 4 makees counter motion, make two extraction sectors 4 by same head cover 46 into and out of
Air in container is extracted out and is discharged to outside.
Compared with prior art, due to being provided in the vacuum pump of the utility model in the top surface of piston 43 and lower valve
The corresponding groove 431 in 452 positions, therefore the groove 431 can accommodate lower valve 452 when 452 deformation of lower valve is opened, under making
Valve 452 will not strike piston 43, significantly reduce the risk of the noise and structural failure in the vacuum pump course of work.
Above disclosed is only the preferred embodiments of the utility model, and effect is to facilitate those skilled in the art
Understand and implement according to this, the interest field of the utility model cannot be limited with this certainly, therefore special according to the present utility model application
The equivalent variations that sharp range is made still fall within the range that the utility model is covered.
Claims (10)
1. a kind of vacuum pump, it is characterised in that：Including main casing, dual-axle motor, connecting leg and two extraction sectors, the air exhauster
Structure includes shell, cylinder, piston, valve plate, upper valve, lower valve, head cover and piston rod, and the shell is fixed on the master
Shell one end, the cylinder are fixed on the shell upper end, and the piston is set in the cylinder, and the valve plate is fixed on described
On shell and the first valve opening and the second valve opening are opened up, the upper valve is fixed on first described in the valve plate top surface and unidirectional blocking
Valve opening, the lower valve are fixed on the valve plate bottom surface and the second valve opening described in unidirectional blocking, the top surface setting one of the piston
Groove corresponding with the lower valve position, the head cover are fixed on the valve plate, and two extraction sectors are respectively arranged in
The both ends of the main casing, the output shaft at the dual-axle motor both ends are respectively protruding into two extraction sectors and drive the pumping
Mechanism of qi structure, the connecting leg are connected between two head covers.
2. vacuum pump as described in claim 1, it is characterised in that：The shell includes lower housing and is fixed on the lower housing
On upper shell, the both ends of the lower housing are respectively provided with open front and after-opening, the upper end opening of the upper shell, the vapour
Cylinder is fixed in the upper shell, and the side of the upper shell sets the gap connected with the open front, the piston rod
Lower end be located in the lower housing, the upper end of the piston rod is stretched into the upper shell and is fixed with the piston.
3. vacuum pump as claimed in claim 2, it is characterised in that：The lower housing and upper shell are cylindrical.
4. vacuum pump as claimed in claim 2, it is characterised in that：The upper shell is an integral molding structure with lower housing.
5. vacuum pump as described in claim 1, it is characterised in that：The shell, which further includes, to be fixed on the lower housing and covers
The fan cover of the open front.
6. vacuum pump as described in claim 1, it is characterised in that：Sealing ring is provided between the valve plate and head cover, it is described
First valve opening and the second valve opening are located in the range that the sealing ring surrounds.
7. vacuum pump as claimed in claim 6, it is characterised in that：The valve plate is equipped with locating slot, the sealing ring positioning
In the locating slot.
8. vacuum pump as described in claim 1, it is characterised in that：The extraction sector further includes a cam, the cam with
The output shaft is fixed, and the lower end of the piston rod is connected to the cam.
9. vacuum pump as described in claim 1, it is characterised in that：The extraction sector, which further includes, is fixed on the output shaft end
The radiator fan at end.
10. vacuum pump as described in claim 1, it is characterised in that：The shell of two extraction sectors is connected solid by screw rod
It is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721290175.6U CN207500079U (en) | 2017-09-30 | 2017-09-30 | Vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721290175.6U CN207500079U (en) | 2017-09-30 | 2017-09-30 | Vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207500079U true CN207500079U (en) | 2018-06-15 |
Family
ID=62500069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721290175.6U Expired - Fee Related CN207500079U (en) | 2017-09-30 | 2017-09-30 | Vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207500079U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653992A (en) * | 2018-12-26 | 2019-04-19 | 广州纯水健康科技有限公司 | A kind of efficiently cooling vacuum pump and application |
| CN112555119A (en) * | 2020-12-02 | 2021-03-26 | 东莞市莱诺机电科技有限公司 | Oil-free vacuum pump |
-
2017
- 2017-09-30 CN CN201721290175.6U patent/CN207500079U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653992A (en) * | 2018-12-26 | 2019-04-19 | 广州纯水健康科技有限公司 | A kind of efficiently cooling vacuum pump and application |
| CN112555119A (en) * | 2020-12-02 | 2021-03-26 | 东莞市莱诺机电科技有限公司 | Oil-free vacuum pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180615 Termination date: 20190930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |