CN109026856A - Compact type vacuum generator - Google Patents
Compact type vacuum generator Download PDFInfo
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- CN109026856A CN109026856A CN201811152789.7A CN201811152789A CN109026856A CN 109026856 A CN109026856 A CN 109026856A CN 201811152789 A CN201811152789 A CN 201811152789A CN 109026856 A CN109026856 A CN 109026856A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
- F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The object of the present invention is to provide a kind of gas flow rate is higher, use cost can be reduced, swabbing pressure is improved, vacuum generator volume can be reduced compact type vacuum generator.To achieve the above object, the present invention adopts the following technical scheme: a kind of compact type vacuum generator, including shell, the shell is equipped with suction end, inlet end and outlet side, the first gas circuit and the second gas circuit are equipped in the shell, first air circuit connection is equipped with gas source opening and closing execution valve between inlet end and outlet side, between the inlet end and outlet side and Laval nozzle component, second gas circuit are set between suction end and Laval nozzle component；It includes the first valve body that the gas source opening and closing, which executes valve, the first valve body axial ends is equipped with the first spool through simultaneously interior, both ends are connected with the first auxiliary air passage and the second auxiliary air passage to first valve body between inlet end respectively axially back and forth, are provided with the first control valve on first auxiliary air passage.
Description
Technical field
The present invention relates to a kind of vacuum generators, and in particular to a kind of compact type vacuum generator.
Background technique
Vacuum generator is a kind of efficient, the cleaning, small-sized vacuum component that negative pressure is generated using positive pressure gas source, vacuum
The conventional use of generator is cooperated with sucker to carry out the absorption of various materials, in order to the carrying and fixation of material.But it is existing
There are gas flow rates in vacuum generator slower, so that the aspiration pneumatic power of vacuum generator suction end is lower, it only will be true
Volume bigizationner or make admission pressure is higher just to can guarantee enough aspiration pneumatic power that empty generator is done, so that existing vacuum is sent out
Energy consumption is high, volume is big for raw device；The biggish vacuum generator of volume takes up too much space, and is not easy to the absorption feeding of components.
Summary of the invention
The object of the present invention is to provide a kind of gas flow rate is higher, use cost can be reduced, swabbing pressure is improved, can reduce
The compact type vacuum generator of vacuum generator volume.
To achieve the above object, the present invention adopts the following technical scheme: a kind of compact type vacuum generator, including shell,
The shell is equipped with suction end, inlet end and outlet side, is equipped with the first gas circuit and the second gas circuit in the shell, and described first
Air circuit connection is equipped with gas source opening and closing between inlet end and outlet side, between the inlet end and outlet side and executes valve and Lavalle
Nozzle component, second gas circuit are set between suction end and Laval nozzle component, and when inlet end air inlet and gas source is opened and closed
It executes valve to open, the gas in the second gas circuit is fed to after Laval nozzle component to be discharged from outlet side again；The gas source is opened
Closing and executing valve includes the first valve body, and the first valve body axial ends is equipped with the first spool, the first valve body axis through simultaneously interior
Forward end internal diameter is greater than axial rearward end internal diameter, and both ends are connected with the first auxiliary gas to the first valve body between inlet end respectively axially back and forth
Road and the second auxiliary air passage are provided with the first control valve on first auxiliary air passage, and the first valve body axial forward end is close
The internal diameter of first auxiliary air passage is greater than the first valve body axial rearward end and sets on the internal diameter of the second auxiliary air passage, first valve body
There are valve body air inlet and valve body gas outlet, first spool is equipped with the first valve seals, and the valve body air inlet is located at
On front side of valve body gas outlet, valve opening is executed when gas source is opened and closed, the gas in inlet end passes sequentially through valve body air inlet and valve body goes out
Port executes valve and closes to flow to Laval nozzle component when gas source is opened and closed, and first spool moves forward so that described the
One valve seals closed valve air inlet or valve body gas outlet.
Vacuum generator of the present invention is carried out in use, supplying gas by devices such as air pumps to inlet end, due to the second auxiliary gas
The setting on road has always gas to impact the first spool rear end, when the first control valve disconnects the first auxiliary air passage, is able to achieve gas source
Opening and closing executes the closing of valve, to realize the disconnection of the first gas circuit, when the first control valve penetrates through the first auxiliary air passage, due to first
Valve body forward end gas is greater than the sectional area that the first valve rear end gas passes through, the gas energy in the first auxiliary air passage by sectional area
The first spool is pushed to move backward, so that valve body air inlet is connected to valve body gas outlet, so that the opening of the first gas circuit.The present invention
Gas source opening and closing execution valve arrangement is compact, and small volume, the first spool is convenient for control movement, so that gas is bigger by flow,
Use cost can be reduced；And vacuum generator of the present invention needs to realize that the disconnection of the first auxiliary air passage just can by the first control valve
Realize that gas source opening and closing executes the closing of valve, it is very convenient.
Preferably, at least by gas source opening and closing execution module, vacuum module, vacuum suck module structure occur for the shell
At the gas source opening and closing execution module includes first shell, and the gas source opening and closing executes valve and is set in first shell, described true
It includes second shell that module, which occurs, for sky, and the Laval nozzle component is set in second shell, the inlet end and outlet side
It is respectively arranged at vacuum and module rear and front end occurs, the vacuum suck module includes third shell, and the suction end is set to
On third shell, the third shell and first shell are all set in second shell, and third shell is set to first shell
Front side, third shell and second shell are fixed by several first screws, and first shell and second shell pass through several second spiral shells
Nail is fixed, and is equipped between first shell and second shell, between second shell and third shell, between first shell and third shell
Mutually matched first positioning protrusion and the first locating slot.
Inventive shell is by multiple module compositions, and adjacent block is made up of the first screw and the second screw, so that this hair
Bright vacuum generator is convenient for assembling, so that gas circuit is more compact, to guarantee gas flow rate and can reduce vacuum generator volume.Together
When, inventive shell modularization composition is easy to disassemble, and it is convenient for subsequent replacement components, directly module can also be replaced,
It repairs more convenient.
Preferably, first spool includes at least one section of spool, two sections of spool and three sections of spool along axial, described the
One valve body is along axial including at least one section of valve body, two sections of valve body, three sections of valve body, four sections of valve body, five sections of valve body and six sections of valve body, institute
It states one section of valve body and is located at the first valve body front end, sliding block is equipped in one section of the valve body, before sliding block diameter is greater than first spool
Two sections of internal diameters of diameter and valve body are held, one section of the spool is always positioned at two sections of valve body, three sections of valve body, in four sections of valve body, the valve
Body gas outlet is set on three sections of valve body, and the valve body air inlet is set on five sections of valve body, and four sections of rear ends of the valve body have
Beloid narrow orifice structure, two sections of the spool are equipped with first valve seals, the first valve seals outer diameter
Narrow orifice inside diameter of four sections greater than the valve body, when the first spool is moved axially forward along the first valve body, first valve body
Sealing ring offsets with four sections of valve body of narrow orifice inner structural wall, and valve body end cap, the valve body end cap are fixed in six sections of the valve body
Internal diameter is less than one section of internal diameter of the valve body, and three sections of the spool is always positioned in the valve body end cap, two sections of rear ends of the spool
Diameter is greater than three sections of diameters of spool, and two sections of rear ends of the spool are always positioned on front side of valve body end cap, and one section of front end of the spool is set
There are the second valve seals, second valve seals are always positioned in two sections of valve body.
The setting of first spool, the first valve body, valve body end cap and sliding block is opened and closed the assembling for executing valve convenient for gas source；Sliding block
With two sections of spool of the first spool of setting, it is avoided that the first spool is detached from the first valve body, to realize the front and back limit of the first spool
Position；The setting of four sections of rear end narrow orifice structures of spool of first valve body, convenient for the first gas circuit disconnection and guarantee air-tightness；Valve body end
As soon as lid internal diameter is less than valve body section internal diameter, so that after the first spool rear and front end conveying air pressure pressure can make the first spool when identical
It moves back to penetrate through the first gas circuit.
Preferably, being formed through the gas vent of inside and outside wall on one section of rear end side wall of the valve body；It is set on the sliding block
There are one-way seals, sliding block is moved axially backward along the first valve body to seal one section of the valve body, to avoid the first auxiliary air passage
In gas enter between sliding block and the first spool.
When controlling gas source opening and closing execution valve the first gas circuit of opening, sliding block is moved backward, by sliding block and the first valve core chamber
Air be quickly discharged from gas vent so that the moving resistance of sliding block is smaller, in order to the opening of the first gas circuit.One-way seals
Setting so that sliding block move forward when can not achieve sealing effect, with reduce sliding block move forward when resistance, play quickly
Valve closing effect.
Preferably, the Laval nozzle component includes rectification reception pipe and nozzle, rectification reception pipe rear end shape
At having the first venthole so that rectification reception pipe is connected to the second gas circuit, the nozzle rear end is connected to valve body gas outlet, described
Nozzle includes at least one section of nozzle, two sections of nozzle and three sections of nozzle along the first gas circuit from front to back, and one section of the nozzle is in preceding width
Narrow open shape structure afterwards, internal diameter is identical everywhere for two sections of front and backs of the nozzle, and three sections of the nozzle are in beloid narrow orifice shape
Structure, one section of the nozzle is located at first venthole, and the rectification reception pipe includes at least whole from front to back along axial direction
Four sections of one section of stream, two sections of rectification, three sections of rectification and rectification, one section of the rectification is in front wide and rear narrow open shape structure, described whole
Flowing two sections of front and backs, internal diameter is identical everywhere, and three sections of the rectification is in beloid narrow orifice shape structure, and four sections of the rectification is equipped with institute
State the first venthole.
Gas is fluid jet assisted by three sections of apertures of nozzle when passing through nozzle, then passes through two sections of nozzle stable flow velocitys, then
Guarantee its flow velocity by one section of diffusion of nozzle, the flowing of gas in nozzle, to drive the gas being located at spray nozzle front end in through-hole
It is mobile to rectification reception pipe.Due to four sections of reception pipe of presence of rectification, have one between three sections of reception pipe of spray nozzle front end and rectification
Set a distance can guarantee the flow velocity in gas and the second gas circuit after gas mixing.Mixed gas first passes through whole in rectification reception pipe
It flows three sections to receive and accelerate, is guaranteeing flow velocity by two sections of rectifications of rectification, then pass through one section of expansion export of rectification.Above-mentioned setting with
Etc. guaranteeing in the case where smaller admission pressure, it is able to achieve the vacuum of big pressure.
Preferably, the rectification reception pipe is fixedly arranged at the front end with diffusion reception pipe, the shell, which is formed with, accommodates the expansion
The accommodating chamber of reception pipe is dissipated, internal diameter is identical everywhere for the diffusion reception pipe front and back, and the diffusion receives bore and rectification receives
Pipe front inner diameter is identical, gap is formed between the diffusion reception pipe peripheral outer wall and receiving cavity wall, and the diffusion receives
Gap is formed between pipe front end and outlet side；Three sections of rear ends of the nozzle are equipped with four sections of nozzle, and four sections of front and backs of the nozzle are everywhere
Internal diameter is identical, and four sections of internal diameters of nozzle are greater than two sections of one section of internal diameter of nozzle, rectification internal diameters；One segment length of nozzle is nozzle three
The three to four-fold of segment length, two sections of nozzle of the length for being shorter in length than three sections of nozzle；One segment length of the rectification is greater than rectification three
Segment length, rectification two segment length are four to five times for rectifying three segment length, rectify one section of bell mouth angle and are greater than three sections of loudspeakers of rectification
Bicker degree.Above-mentioned setting with etc. guarantee in the case where smaller admission pressure, be able to achieve the vacuum of big pressure.
Preferably, being equipped with third gas circuit in the shell, the third gas circuit is set between inlet end and suction end,
The third gas circuit is equipped with air admission valve, and the air admission valve includes the second valve body and the second spool, second valve
Core is threadedly engaged in second valve body, second valve core rotation so that the second spool is moved forward and backward along the second valve body, with
It is moved forward and backward the second spool rear end in third gas circuit to control the on-off of third gas circuit；Second spool is located at the second valve
External one end is fixed with runner；The third gas circuit is equipped with the second control valve, when the second control valve and air admission valve all
It opens, so that third gas circuit penetrates through.
When needing to adjust destruction vacuum value of velocity, by the rotation of the second spool of air admission valve, so that the second spool
It being moved forward and backward, the second spool moves forward so that third gas circuit penetrates through, so that the gas at inlet end can import in the second gas circuit,
So that the gas of gas source can be flowed to outlet side along the second gas circuit, can be moved to outside suction end along suction end to impact components,
So that sucker has provided positive pressure, so that sucker cannot adsorb components.
Preferably, the 4th gas circuit is equipped between first control valve and outlet side, when the first control valve controls first
Auxiliary air passage is connected to the 4th gas circuit, and the gas in the first auxiliary air passage is discharged by the 4th gas circuit from outlet side.
Above-mentioned setting is used for the exhaust of the first auxiliary air passage, makes the first auxiliary air passage and the 4th gas circuit by the first control valve
Connection executes valve disconnection first so that the gas in the first auxiliary air passage can directly be discharged from outlet side in order to which gas source is opened and closed
Gas circuit.
Preferably, second gas circuit is equipped with vacuum suck end component far from one end of Laval nozzle component, it is described
Vacuum suck end component includes the filter core of the suction end and cast, and the suction end rear end is formed with link block, the connection
Run through before and after block, and the link block is formed with the small step structure of the big rear end outer diameter of front end external diameter, the suction end passes through the
Three screws are fixed with shell, so that filter core is limited between the step of link block and shell and blocks filter core front end, and make to filter
In-core chamber is communicated with the second gas circuit, and the link block front end is formed with several the second ventholes through side wall, when suction end is inhaled
Gas, the gas in suction end enter the second gas circuit after passing sequentially through the second venthole and filter core side wall；The shell be equipped with by
Block is observed made of transparent material, the observation block is set on the outside of filter core, and the observation block and shell are formed with mutual cooperation
The second positioning protrusion and second location hole, the shell or observation block end face on be formed with annular groove and be equipped with observation block sealing
Part, the suction end leading portion outer diameter are greater than suction end middle section outer diameter, and the suction end is fixed by third screw with shell, so that
Observation block is limited between suction end leading portion and shell, and is clamped at observation block sealing element between shell and observation block.
The present invention is provided with filter core, can protect to the second gas circuit and the first gas circuit, to guarantee Laval nozzle component
The finish of inner wall, to guarantee that vacuum generator of the present invention is able to achieve high vacuum pressure.The present invention is provided with observation block, can make to filter
Core is run through, and the disassembly of suction end and observation block is very convenient, removes cleaning or replacement convenient for filter core.
Preferably, the shell is equipped with pressure sensing port, the pressure sensing port is communicated with the second gas circuit, the shell
Pressure sensor or sprue are removably fixed on body, when pressure sensor and shell are fixed, the pressure sensor detection the
Air pressure in two gas circuits, when sprue and shell are fixed, the sprue closes the pressure sensing port.
When the more automation for needing to use vacuum generator of the present invention and conveniently, the sprue on shell can be removed, then
It is detected by vacuum pressure of the pressure sensor to the second gas circuit, in order to the first valve body and switching on-off.
The present invention in smaller admission pressure with that can realize biggish vacuum pressure, use cost can be reduced,
Guarantee the absorption of components, moreover it is possible to the volume of vacuum generator is reduced, in order to the use of vacuum generator of the present invention, the present invention
Vacuum generator is by multiple module compositions, manufacture assembling of being more convenient for, while gas circuit can also be made more compact, so that relatively large vacuum
The realization of pressure is protected.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the invention；
Fig. 2 is a kind of cross-sectional view that gas source of the invention is opened and closed execution module；
Fig. 3 is a kind of cross-sectional view of the first valve body and the first spool that gas source opening and closing of the invention executes valve；
Fig. 4 is the first valve body and a kind of cooperation schematic diagram of the first spool that gas source opening and closing of the invention executes valve；
Fig. 5 is a kind of cross-sectional view that module occurs for vacuum of the invention；
Fig. 6 is a kind of cross-sectional view of vacuum suck module of the invention；
Fig. 7 is a kind of cross-sectional view of the air admission valve of vacuum suck module of the invention；
Fig. 8 is a kind of structural schematic diagram of the suction end of vacuum suck module of the invention, observation block, filter core；
Fig. 9 is that gas source of the invention is opened and closed execution module, module, vacuum suck module, the first control valve and second occur for vacuum
A kind of fixed structural schematic diagram of control valve combination；
Figure 10 is schematic diagram of gas circuit of the invention；
Figure 11 is the schematic diagram of gas circuit equipped with pressure sensor of the invention；
Figure 12 is a kind of structural schematic diagram equipped with pressure sensor of the invention.
Specific embodiment
Below according to the drawings and specific embodiments, the invention will be further described.
As shown in Fig. 1, Figure 10, a kind of compact type vacuum generator of the invention, including shell, shell are equipped with suction end
11, inlet end 12 and outlet side 13, are equipped with the first gas circuit 100 and the second gas circuit 200 in shell, the first gas circuit 100 be connected into
It is equipped with gas source opening and closing between gas end 12 and outlet side 13, between inlet end 12 and outlet side 13 and executes valve 20 and Laval nozzle group
Part 30, the second gas circuit 200 are set between suction end 11 and Laval nozzle component 30, and when 12 air inlet of inlet end and gas source is opened and closed
It executes valve 20 to open, the gas in the second gas circuit 200 is fed to after Laval nozzle component 30 to be discharged from outlet side 13 again.
As shown in Fig. 1 to Fig. 4, Figure 10, it includes the first valve body 21,21 axial ends of the first valve body that gas source opening and closing, which executes valve 20,
It is equipped with the first spool 22 through simultaneously interior, 21 axial forward end internal diameter of the first valve body is greater than axial rearward end internal diameter, and the first valve body 21 is axial
Rear and front end is connected with the first auxiliary air passage 300 and the second auxiliary air passage 400, the first auxiliary air passage between inlet end 12 respectively
The first control valve 50 is provided on 300,21 axial forward end of the first valve body is greater than the first valve close to the internal diameter of the first auxiliary air passage 300
21 axial rearward end of body is close to the internal diameter of the second auxiliary air passage 400, and the first valve body 21 is equipped with valve body air inlet 211 and valve body outlet
Mouth 212, the first spool 22 are equipped with the first valve seals 220, and valve body air inlet 211 is located at 212 front side of valve body gas outlet, when
Gas source opening and closing executes valve 20 and opens, and the gas in inlet end 12 passes sequentially through valve body air inlet 211 and valve body gas outlet 212 to flow
To Laval nozzle component, the closing of valve 20 is executed when gas source is opened and closed, the first spool 22 moves forward so that the first valve seals
220 closed valve air inlets 211 or valve body gas outlet 212.
First spool 22 is along axial including at least one section 221 of spool, two section 222 of spool and three section 223 of spool, the first valve body
21 include at least one section 213 of valve body, two section 214 of valve body, three section 215 of valve body, five section of 217 four section 216 of valve body, valve body and along axial
Six section 218 of valve body, one section 213 of valve body is located at 21 front end of the first valve body.
Sliding block 23 is equipped in one section 213 of valve body, 23 diameter of sliding block is greater than 22 point diameter of the first spool and two section 214 of valve body
Internal diameter, one section 221 of spool is always positioned at two section 214 of valve body, three section 215 of valve body, in four section 216 of valve body, and valve body gas outlet 212 is set
Be placed on three section 215 of valve body, valve body air inlet 211 is set on five section 217 of valve body, four section of 216 rear end of valve body have it is preceding it is narrow after
Wide narrow orifice structure, two section 214 of spool is equipped with first valve seals 20, and 220 outer diameter of the first valve seals is greater than
Four section 216 of valve body of narrow orifice inside diameter, when the first spool 22 along the first valve body 21 moved axially forward, the first valve seals
220 offset with four section 216 of valve body of narrow orifice inner structural wall, and valve body end cap 219, valve body end cap 219 are fixed in six section 218 of valve body
Internal diameter is less than one section of 213 internal diameter of valve body, and three section 223 of spool is always positioned in valve body end cap 219, two section of 222 rear end diameter of spool
Greater than three section of 223 diameter of spool, two section of 222 rear end of spool is always positioned at 219 front side of valve body end cap, and one section of 221 front end of spool is set
There are the second valve seals 220, the second valve seals 220 are always positioned in two section 214 of valve body.
The gas vent 24 of inside and outside wall is formed through on one section of 213 rear end side wall of valve body, sliding block 23 is equipped with one-way sealing
Part 25, sliding block 23 are moved axially backward along the first valve body 21 with one section 213 of sealed valve body, to avoid in the first auxiliary air passage 300
Gas enter between sliding block 23 and the first spool 22.
As shown in Fig. 1, Fig. 5, Figure 10, Laval nozzle component 30 includes rectification reception pipe 31 and nozzle 32, and rectification receives
31 rear end of pipe is formed with the first venthole 36 and is connected to so as to rectify reception pipe 31 with the second gas circuit 200,32 rear end of nozzle and valve body
Gas outlet 212 is connected to, and nozzle 32 includes at least one section 321 of nozzle, two section 322 of nozzle, nozzle along the first gas circuit 100 from front to back
Three section 323 and four section 324 of nozzle, one section 321 of nozzle is in front wide and rear narrow open shape structure, and two section of 322 front and back of nozzle is interior everywhere
Diameter is identical, and three section 323 of nozzle is in beloid narrow orifice shape structure, and one section 321 of nozzle is located at the first venthole 36, and rectification connects
Closed tube 31 includes at least four section 314 of one section 311 of rectification, two section 312 of rectification, three section 313 of rectification and rectification along axial direction from front to back,
One section 311 of rectification is in front wide and rear narrow open shape structure, and rectifying two section of 312 front and back, internal diameter is identical everywhere, before three section 313 of rectification is in
Wide narrow orifice shape structure after narrow, four section 314 of rectification is equipped with the first venthole 36.
Rectification reception pipe 31 is fixedly arranged at the front end with diffusion reception pipe 33, and shell is formed with the accommodating chamber for accommodating diffusion reception pipe 33
34, internal diameter is identical everywhere for 33 front and back of diffusion reception pipe, and diffusion 33 internal diameter of reception pipe is identical as rectification 31 front inner diameter of reception pipe, expands
It is formed with gap between scattered 34 inner wall of 33 peripheral outer wall of reception pipe and accommodating chamber, and spreads shape between 33 front end of reception pipe and outlet side 13
At there is gap.Internal diameter is identical everywhere for four section 324 of nozzle front and back, and four section of 324 internal diameter of nozzle is greater than one section of 321 internal diameter of nozzle, whole
Two section of 312 internal diameter is flowed, one section of 321 length of nozzle is the three to four-fold of three section of 323 length of nozzle, and the length that two section 322 of nozzle is short
In three section 323 of length of nozzle, rectifies one section of 311 length and be greater than three section of 313 length of rectification, rectifying two section of 312 length is rectification
Four to five times of three section of 313 length rectify one section of 311 bell mouth angle and are greater than three section of 313 bell mouth angle of rectification.
As shown in Fig. 1, Fig. 6, Fig. 7, Figure 10, third gas circuit 500 is equipped in shell, third gas circuit 500 is set to inlet end
Between 12 and suction end 11, third gas circuit 500 is equipped with air admission valve 70, and air admission valve 70 includes the second valve body 41 and the
Two spools 42, the second spool 42 are threadedly engaged in the second valve body 41, and it is solid that the second spool 42 is located at one end outside the second valve body 41
Surely there is runner 43, the second spool 42 rotates so that the second spool 42 is moved forward and backward along the second valve body 41, so that after the second spool 42
It holds and is moved forward and backward in third gas circuit 500 to control the on-off of third gas circuit 500,500 are equipped with the second control valve in third gas circuit
60, when the second control valve 60 and air admission valve are all opened, so that third gas circuit 500 penetrates through.
The 4th gas circuit 600 is equipped between first control valve 50 and outlet side 13, when the first auxiliary of the first control valve 50 control
Gas circuit 300 is connected to the 4th gas circuit 600, and the gas in the first auxiliary air passage 300 passes through the 4th gas circuit 600 from 13 row of outlet side
Out.
As shown in Fig. 1, Fig. 6, Fig. 8, Figure 10, the second gas circuit 200 is equipped with vacuum far from one end of Laval nozzle component 30
Suction side component, vacuum suck end component include the filter core 51 of the suction end 12 and cast, and 12 rear end of suction end is formed with company
Block 52 is connect, is run through before and after link block 52, and link block 52 is formed with the small step structure of the big rear end outer diameter of front end external diameter, suction end
12 are fixed by third screw 53 with shell, and filter core 51 is limited between the step and shell of link block 52 and blocks filter core 51
Front end, and communicate 51 inner cavity of filter core with the second gas circuit 200,52 front end of link block is formed with several the second ventilations through side wall
Hole 54 enters the after the gas in 11 air-breathing of suction end, suction end 11 passes sequentially through 41 side wall of the second venthole 54 and filter core
Two gas circuits 200.
Shell is equipped with the observation block 55 being made of clear material, and observation block 55 is set in 51 outside of filter core, observes block 55
It is formed with mutually matched second positioning protrusion and second location hole with shell, annular groove is formed on housing forward end face and is equipped with
Block sealing element is observed, 11 leading portion outer diameter of suction end is greater than 11 middle section outer diameter of suction end, and suction end 11 passes through third screw 53 and shell
Body is fixed, so that observation block 55 is limited between 11 leading portion of suction end and shell, and observation block sealing element is made to be clamped at shell
Between body and observation block 55.
As shown in Fig. 1, Fig. 9, Figure 10, Figure 11, Figure 12, at least by gas source opening and closing execution module 2, vacuum module occurs for shell
3, vacuum suck module 4 is constituted, and it includes first shell 29 that gas source, which is opened and closed execution module 2, and gas source opening and closing executes valve 20 and is set to the
In one shell 29, it includes second shell 39 that module 3, which occurs, for vacuum, and Laval nozzle component 30 is set in second shell 39, into
Gas end 12 and outlet side 13 are respectively arranged at vacuum and 3 rear and front end of module occur, and vacuum suck module 4 includes third shell 49,
Suction end 11 is set on third shell 49, and third shell 49 and first shell 29 are all set in second shell 39, and third
Shell 49 is set to 29 front side of first shell, and third shell 49 and second shell 39 are fixed by several first screws 61, and first
Shell 29 and second shell 39 are fixed by several second screws 62.Wherein, between first shell 29 and second shell 39, second shell
The first positioning protrusion and first are provided with matching between body 39 and third shell 49, between first shell 29 and third shell 49
Locating slot.
Third shell 49 is equipped with pressure sensing port 63, and pressure sensing port 63 is communicated with the second gas circuit 200, third shell 49
On be removably fixed with pressure sensor 64 or sprue 65, when pressure sensor 64 and third shell are fixed, pressure sensor 64
The vacuum pressure size in the second gas circuit 200 is detected, when sprue 65 and the fixation of third shell 49,65 confining pressure detection hole of sprue
63.Wherein, sprue 65 and pressure sensor 64 are fixed by the first screw 61 and third shell 49.First control valve 50 and
Two control valves 60 include solenoid valve and hand control valve, and the first control valve 50 and the second control valve 60 pass through several the respectively
Four screws 66 and first shell 29 are fixed.
Make inlet end air inlet, there is pressure-air to supply gas by the second auxiliary air passage to the first spool rear end at this time, control the
One control valve opens the first auxiliary air passage, and gas exerts a force to the first spool front end by the first auxiliary air passage, due to the first valve body
The internal diameter (internal diameter that one section of valve body) of front end is greater than the first valve rear end (internal diameter of valve body end cap), and gas will push sliding block backward
It is mobile, to push the first spool to move backward, to realize the valve body air inlet of the first valve body and the connection of valve body gas outlet, with reality
To vacuum module flowing occurs for the opening of existing first gas circuit, gas after the first valve body.Gas flow forward after nozzle accelerates,
To drive the air in suction end that the Laval nozzle component flow of module occurs along the second gas circuit to vacuum, in the second gas circuit
First venthole of rectification reception pipe rear end of the air through Laval nozzle component enters in rectification reception pipe, in rectification reception pipe
Rear end (rectification four sections of reception pipe) carries out the mixing of gas, and the acceleration of mixed gas is realized by rectification reception pipe, to realize the
The quick flowing of two intratracheal gases, so that the second gas circuit end has biggish vacuum pressure.
When needing to reduce vacuum pressure or vacuum pressure being made to disappear, the runner of rotation vacuum destructive valve, so that the second valve
Core is moved to far from third gas circuit side, so that third gas circuit penetrates through, so that the gas of gas source enters directly into the second gas circuit,
It even disappears so that the vacuum pressure of the second gas circuit gradually decreases.Wherein, the second control valve carries out the switching of gas circulating direction.
Wherein, by controlling the first control valve, to switch gas circulating direction, so that the gas in the first auxiliary air passage moves
It moves to the 4th gas circuit, then is discharged from outlet side.
When needing to make the use of vacuum generator of the present invention more to automate, can be arranged in vacuum suck module and second
The pressure sensing port that gas circuit communicates, and pressure sensor is carried out by the first screw and is fixed with third shell, to realize vacuum pressure
The detection of power, in order to the on-off of the first control valve and the second control valve.
The present invention in smaller admission pressure with that can realize biggish vacuum pressure, use cost can be reduced,
Guarantee the absorption of components, moreover it is possible to the volume of vacuum generator is reduced, in order to the use of vacuum generator of the present invention, the present invention
Vacuum generator is by multiple module compositions, manufacture assembling maintenance of being more convenient for, while gas circuit can also be made more compact, so that larger
The realization of vacuum pressure is protected.
Claims (10)
1. a kind of compact type vacuum generator, it is characterised in that including shell, the shell is equipped with suction end, inlet end and goes out
Gas end, the shell is interior to be equipped with the first gas circuit and the second gas circuit, and first air circuit connection is between inlet end and outlet side, institute
It states and is set to air-breathing equipped with gas source opening and closing execution valve and Laval nozzle component, second gas circuit between inlet end and outlet side
Between end and Laval nozzle component, when inlet end air inlet and gas source opening and closing executes valve and opens, and the gas in the second gas circuit is led
It is discharged again from outlet side after entering to Laval nozzle component；It includes the first valve body, first valve that the gas source opening and closing, which executes valve,
Body axial ends through and in be equipped with the first spool, the first valve body axial forward end internal diameter be greater than axial rearward end internal diameter, first
Both ends are connected with the first auxiliary air passage and the second auxiliary air passage, the first auxiliary gas to valve body between inlet end respectively axially back and forth
Road is provided with the first control valve, and the first valve body axial forward end is greater than the first valve body axis close to the internal diameter of the first auxiliary air passage
To the back-end close to the internal diameter of the second auxiliary air passage, first valve body is equipped with valve body air inlet and valve body gas outlet, and described the
One spool is equipped with the first valve seals, and the valve body air inlet is located on front side of valve body gas outlet, executes valve when gas source is opened and closed
It opens, the gas in inlet end passes sequentially through valve body air inlet and valve body gas outlet to flow to Laval nozzle component, works as gas source
Opening and closing executes valve and closes, and first spool moves forward so that the first valve seals closed valve air inlet or valve body
Gas outlet.
2. compact type vacuum generator according to claim 1, it is characterised in that the shell is at least held by gas source opening and closing
Module, vacuum suck module composition occur for row module, vacuum, and the gas source opening and closing execution module includes first shell, the gas
Source opening and closing executes valve and is set in first shell, and it includes second shell that module, which occurs, for the vacuum, the Laval nozzle component
It is set in second shell, the inlet end and outlet side are respectively arranged at vacuum and module rear and front end occur, and the vacuum is inhaled
Entering module includes third shell, and the suction end is set on third shell, and the third shell and first shell are all set in
In second shell, and third shell is set on front side of first shell, and third shell and second shell are solid by several first screws
Fixed, first shell and second shell are fixed by several second screws, and between first shell and second shell, second shell and the
The first positioning protrusion and the first locating slot are provided with matching between three shells, between first shell and third shell.
3. compact type vacuum generator according to claim 1 or claim 2, it is characterised in that first spool is at least wrapped along axial direction
One section of spool, two sections of spool and three sections of spool are included, first valve body includes at least one section of valve body, two sections of valve body, valve along axial
Three sections of body, four sections of valve body, five sections of valve body and six sections of valve body, one section of the valve body is located at the first valve body front end, one section of the valve body
Interior to be equipped with sliding block, sliding block diameter is greater than two sections of internal diameters of the first spool point diameter and valve body, one section of spool position always
In in two sections of valve body, three sections of valve body, four sections of valve body, the valve body gas outlet is set on three sections of valve body, the valve body air inlet
It is set on five sections of valve body, four sections of rear ends of the valve body have beloid narrow orifice structure, and two sections of the spool equipped with described
First valve seals, the first valve seals outer diameter is greater than the narrow orifice inside diameter of four sections of the valve body, when the first valve
Core is moved axially forward along the first valve body, and first valve seals offset with four sections of valve body of narrow orifice inner structural wall, described
Valve body end cap is fixed in six sections of valve body, the valve body end cap internal diameter is less than one section of internal diameter of the valve body, three sections of spool beginnings
For final position in the valve body end cap, two sections of rear end diameters of the spool are greater than three sections of diameters of spool, and two sections of rear ends of the spool are begun
Final position is on front side of valve body end cap, and one section of front end of the spool is equipped with the second valve seals, and second valve seals are always
In two sections of valve body.
4. compact type vacuum generator according to claim 3, it is characterised in that shape on one section of rear end side wall of the valve body
At the gas vent having through inside and outside wall；The sliding block be equipped with one-way seals, sliding block along the first valve body move axially backward with
One section of the valve body is sealed, is entered between sliding block and the first spool to avoid the gas in the first auxiliary air passage.
5. compact type vacuum generator according to claim 1 or 2, it is characterised in that the Laval nozzle component includes
Reception pipe and nozzle are rectified, the rectification reception pipe rear end is formed with the first venthole so that rectification reception pipe and the second gas circuit connect
Logical, the nozzle rear end is connected to valve body gas outlet, and the nozzle includes at least one section of nozzle, spray along the first gas circuit from front to back
Two sections of mouth and three sections of nozzle, one section of the nozzle is in front wide and rear narrow open shape structure, two sections of front and backs of nozzle internal diameter everywhere
Identical, three sections of the nozzle are in beloid narrow orifice shape structure, and one section of the nozzle is located at first venthole, described
It rectifies reception pipe and includes at least four sections of one section of rectification, two sections of rectification, three sections of rectification and rectification, the rectification from front to back along axial direction
One section be in front wide and rear narrow open shape structure, it is described rectification two sections front and back everywhere internal diameter it is identical, it is described rectification three sections in it is preceding it is narrow after
Wide narrow orifice shape structure, four sections of the rectification are equipped with first venthole.
6. compact type vacuum generator according to claim 5, it is characterised in that the rectification reception pipe is fixedly arranged at the front end with
Reception pipe is spread, the shell is formed with the accommodating chamber for accommodating the diffusion reception pipe, and the diffusion reception pipe front and back is interior everywhere
Diameter is identical, and the diffusion reception bore is identical as rectification reception pipe front inner diameter, the diffusion reception pipe peripheral outer wall and appearance
It receives and is formed with gap between cavity wall, and be formed with gap between the diffusion reception pipe front end and outlet side；After three sections of the nozzle
End is equipped with four sections of nozzle, and internal diameter is identical everywhere for four sections of nozzle front and back, and four sections of internal diameters of nozzle are greater than one section of internal diameter of nozzle, whole
Flow two sections of internal diameters；One segment length of nozzle is the three to four-fold of three segment length of nozzle, and two sections of nozzle are shorter in length than nozzle three
The length of section；One segment length of the rectification is greater than three segment length of rectification, and rectification two segment length is rectify three segment length four to five
Times, it rectifies one section of bell mouth angle and is greater than three sections of bell mouth angles of rectification.
7. compact type vacuum generator according to claim 1 or 2, it is characterised in that be equipped with third gas in the shell
Road, the third gas circuit are set between inlet end and suction end, and the third gas circuit is equipped with air admission valve, the vacuum
Destructive valve includes the second valve body and the second spool, and second spool is threadedly engaged in second valve body, second valve
Core rotates so that the second spool is moved forward and backward along the second valve body, so that the second spool rear end is moved forward and backward in third gas circuit to control
The on-off of third gas circuit processed；One end that second spool is located at outside the second valve body is fixed with runner；It is set in the third gas circuit
There is the second control valve, when the second control valve and air admission valve are all opened, so that third gas circuit penetrates through.
8. compact type vacuum generator according to claim 1 or 2, it is characterised in that first control valve and outlet side
Between be equipped with the 4th gas circuit, be connected to when the first control valve controls the first auxiliary air passage with the 4th gas circuit, in the first auxiliary air passage
Gas is discharged by the 4th gas circuit from outlet side.
9. compact type vacuum generator according to claim 1 or 2, it is characterised in that second gas circuit is far from Lavalle
One end of nozzle component is equipped with vacuum suck end component, and vacuum suck end component includes the filter of the suction end and cast
Core, the suction end rear end are formed with link block, run through before and after the link block, and to be formed with front end external diameter big for the link block
The small step structure of rear end outer diameter, the suction end is fixed by third screw with shell, so that filter core is limited in link block
Step and shell between and block filter core front end, and communicate filter core inner cavity with the second gas circuit, the link block front end is formed
There are several the second ventholes through side wall, when the gas in suction end air-breathing, suction end passes sequentially through the second venthole and filter
Enter the second gas circuit after core side wall；The shell is equipped with the observation block being made of clear material, and the observation block is set in filter
On the outside of core, the observation block and shell are formed with mutually matched second positioning protrusion and second location hole, the shell or sight
It examines and is formed with annular groove on block end face and is equipped with observation block sealing element, the suction end leading portion outer diameter is greater than outside suction end middle section
Diameter, the suction end are fixed by third screw and third shell so that observation block be limited in suction end leading portion and shell it
Between, and it is clamped at observation block sealing element between shell and observation block.
10. compact type vacuum generator according to claim 1 or 2, it is characterised in that the shell is examined equipped with pressure
Gaging hole, the pressure sensing port are communicated with the second gas circuit, and pressure sensor or sprue are removably fixed on the shell, works as pressure
Force snesor is fixed with shell, and the pressure sensor detects the air pressure in the second gas circuit, described to block up when sprue and shell are fixed
Block closes the pressure sensing port.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811152789.7A CN109026856B (en) | 2018-09-30 | 2018-09-30 | Compact vacuum generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811152789.7A CN109026856B (en) | 2018-09-30 | 2018-09-30 | Compact vacuum generator |
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| CN109026856B CN109026856B (en) | 2023-09-29 |
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| CN111059084A (en) * | 2019-12-09 | 2020-04-24 | 行益科技(宁波)有限公司 | Miniature integrated vacuum generator and generation method and miniature vacuum generation assembly |
| CN112814957A (en) * | 2021-03-10 | 2021-05-18 | 行益科技(宁波)有限公司 | Small valve pilot type sheet-mounted integrated large-flow vacuum generator |
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| CN109026856B (en) | 2023-09-29 |
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