CN112814957B - Small valve pilot type sheet-mounted integrated high-flow vacuum generator - Google Patents
Small valve pilot type sheet-mounted integrated high-flow vacuum generator Download PDFInfo
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- CN112814957B CN112814957B CN202110260701.9A CN202110260701A CN112814957B CN 112814957 B CN112814957 B CN 112814957B CN 202110260701 A CN202110260701 A CN 202110260701A CN 112814957 B CN112814957 B CN 112814957B
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- 230000000903 blocking effect Effects 0.000 claims description 35
- 230000000712 assembly Effects 0.000 claims description 14
- 238000000429 assembly Methods 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000007921 spray 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
- 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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- 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
- F04F5/46—Arrangements of nozzles
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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
- F04F5/48—Control
- F04F5/52—Control of evacuating pumps
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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 invention belongs to the technical field of air pressure, and particularly relates to a vacuum generator. The pilot-operated sheet-mounted large-flow vacuum generator comprises a generator shell, a main air inlet, a vacuum piston, a vacuum valve, a nozzle assembly and a nozzle assembly, wherein the nozzle assembly is arranged in a nozzle cavity, and the air inlet of the nozzle assembly is communicated with an air inlet cavity in the nozzle cavity. The main air inlet is respectively communicated with the air inlet of the vacuum piston and the air inlet end of the vacuum valve, the air outlet end of the vacuum valve is communicated with the driving port of the vacuum piston, the air outlet of the vacuum piston is communicated with the air inlet cavity, and the air outlet of the nozzle assembly is communicated with the external environment through the air outlet; the nozzle further comprises a first suction port and a second suction port, wherein a suction joint is arranged at the first suction port, and the second suction port is separated from the first suction cavity and the second suction cavity in the nozzle cavity through two clacks. Compared with other inherent vacuum generators, the invention simultaneously realizes the advantages of large flow, small volume, sheet-mounted, two small valve pilot, piston pilot and the like.
Description
Technical Field
The invention belongs to the technical field of air pressure, and particularly relates to a vacuum generator.
Background
The vacuum generator is a novel, efficient, clean, economical and small-sized vacuum component for generating negative pressure by utilizing a positive pressure air source, so that the negative pressure can be obtained easily and conveniently at a place where compressed air exists or a place where positive and negative pressures are simultaneously required in a pneumatic system. Vacuum generators are widely used in industrial automation in the fields of machinery, electronics, packaging, printing, plastics, robots, etc.
The existing vacuum generator generally generates vacuum flow through high-pressure injection Laval nozzle, and whether vacuum is generated or not is controlled through various pilot valves, so that the following problems exist:
1. Under the requirement of large flow, the large-flow vacuum generator adopts a large-volume spray pipe structure, so that the whole volume is larger;
2. when the small-volume vacuum generator is integrated to form a large-flow vacuum generator, a plurality of independent small valve leads are adopted, so that the number of the small valves is large, the energy consumption is large, and the outgoing lines are large.
Disclosure of Invention
The invention aims at solving the technical problems of large whole volume, large quantity of small valves and more outgoing lines of the existing large-flow vacuum generator, and provides a pilot-type sheet-mounted large-flow vacuum generator with small valves.
The pilot-type sheet-mounted small valve integrated high-flow vacuum generator comprises a generator shell, a main air inlet communicated with an external air source, a vacuum piston arranged in the generator shell, a vacuum valve used for driving the vacuum piston, and a nozzle assembly, wherein the nozzle assembly is detachably arranged in a nozzle cavity in the generator shell, four independent cavities are arranged in the nozzle cavity along the air inlet-to-air outlet direction of the nozzle assembly, the four independent cavities are respectively an air inlet cavity, a first suction cavity, a second suction cavity and an air outlet cavity, the air inlet of the nozzle assembly is communicated with the air inlet cavity, the air outlet of the nozzle assembly is communicated with the air outlet cavity, two nozzle side holes are respectively arranged on the nozzle assembly along the air inlet-to-air outlet direction, the nozzle side holes positioned below are communicated with the first suction cavity, and the nozzle side holes positioned above are communicated with the second suction cavity;
The main air inlet is respectively communicated with the air inlet of the vacuum piston and the air inlet end of the vacuum valve through an air passage, the air outlet end of the vacuum valve is communicated with the driving port of the vacuum piston through an air passage, the air outlet of the vacuum piston is communicated with the air inlet cavity through an air passage, and the air outlet cavity is communicated with the external environment through an air passage and an air outlet;
The device also comprises a first suction port and a second suction port, wherein the first suction port is communicated with the first suction cavity and the external environment, a suction connector is arranged at the first suction port, the second suction port is separated from the first suction cavity through a first valve clack, and the second suction port is separated from the second suction cavity through a second valve clack;
The external air source is used for air inflow through the main air inlet, and respectively reaches the air inlet of the vacuum piston and the air inflow end of the vacuum valve through the air passage, when the vacuum valve works, the air outflow valve port of the vacuum valve is opened, the air outflow end of the vacuum valve is used for air outflow, the vacuum piston is moved, the valve port at the vacuum piston is opened, air enters the air inlet of the nozzle assembly from the air inlet of the vacuum piston through the air outlet of the vacuum piston, when the air flows through the nozzle assembly, negative pressure is generated around the nozzle assembly, the suction connector is driven to suck air, the two valve clacks are opened, when the negative pressure value of the second suction cavity is smaller than the negative pressure value of the second suction port, the second valve clack is closed, and at the moment, the first valve clack is still opened to realize suction.
Through the design, the invention can realize the suction selection of two modes through the pilot action of the vacuum valve, and when the mode is needed, the suction port corresponding to the other mode is blocked.
The air inlet of the nozzle assembly is positioned below, the air outlet of the nozzle assembly is positioned above, a lower blocking opening is formed in the generator shell, the lower blocking opening is positioned below the first valve clack, a lower blocking block is detachably arranged on the lower blocking opening, and the lower blocking block is used for blocking the valve clack to be opened.
The air inlet of the air breaking piston and the air inlet end of the air breaking valve are respectively communicated with the air outlet end of the air breaking valve through an air passage, the air outlet end of the air breaking valve is communicated with the driving port of the air breaking piston through the air passage, and the air outlet of the air breaking piston is communicated with the second suction port through the air passage;
An external air source is used for air inflow through the main air inlet and respectively reaches an air inlet of the air breaking piston and an air inflow end of the air breaking valve through an air path, when the air breaking valve works, an air outflow valve port of the air breaking valve is opened, the air outflow end of the air breaking valve is used for air outflow, the air breaking piston is moved, a valve port at the air breaking piston is opened, and high-pressure air enters the second suction port from the air inlet of the air breaking piston through an air outlet of the air breaking piston; when the suction connector is in a suction mode, the first valve clack and the second valve clack are opened by the air pressure generated by high-pressure air at the second suction opening, the vacuum is broken after the high-pressure air enters the first suction cavity and the second suction cavity, and finally the high-pressure air is discharged from the exhaust port and the suction connector; when the high-pressure gas is in the mode of sucking through the second suction port, the first valve clack and the second valve clack are opened by the air pressure generated by the high-pressure gas at the second suction port, the high-pressure gas enters the first suction cavity and the second suction cavity and breaks vacuum, and finally the high-pressure gas is discharged from the exhaust port and the second suction port.
The vacuum piston and the emptying piston both comprise a pilot cavity arranged in the generator shell, a valve core positioned in the pilot cavity and a valve rod for controlling the valve port of the valve core to be opened and closed, the valve rod is I-shaped, one end of the valve rod is inserted into the valve core, the valve rod divides the valve core and the pilot cavity into an upper area, a middle area and a lower area, and the middle area and the lower area are separated or communicated through the up-down movement of the valve rod;
The driving port of the vacuum piston is positioned in the upper area, the air outlet end of the vacuum valve is communicated with the upper area through an air passage, the air inlet of the vacuum piston is positioned in the middle area, the main air inlet is communicated with the middle area through an air passage, the air outlet of the vacuum piston is positioned in the lower area, and the air inlet cavity is communicated with the lower area through an air passage;
The driving port of the broken air piston is located in the upper area, the air outlet end of the broken air valve is communicated with the upper area through an air passage, the air outlet of the broken air piston is located in the middle area, the second suction port is communicated with the middle area through an air passage, the air inlet of the broken air piston is located in the lower area, and the main air inlet is communicated with the lower area through an air passage.
The nozzle assemblies in the nozzle cavity are at least two groups, and the at least two groups of nozzle assemblies are arranged in the nozzle cavity side by side.
The generator shell is provided with an upper blocking opening, the upper blocking opening is positioned above the air outlets of at least two groups of nozzle assemblies, an upper blocking block is detachably arranged on the upper blocking opening and is used for blocking at least one air outlet of the nozzle assemblies.
The nozzle assembly comprises a primary nozzle, a secondary nozzle and a receiving pipe which are sequentially connected from bottom to top, the length of the primary nozzle is smaller than that of the secondary nozzle, and the interior of the receiving pipe is hollow and adopts a Laval nozzle;
the lower part of the primary nozzle is an air inlet of the nozzle assembly, and the upper part of the receiving pipe is an air outlet of the nozzle assembly.
The lower part of the secondary nozzle is provided with one nozzle side hole which is communicated with the inside and the outside of the secondary nozzle, and the lower part of the receiving tube is provided with the other nozzle side hole which is communicated with the inside and the outside of the receiving tube.
The generator shell comprises a vacuum shell, at least one single-piece shell and a broken shell, wherein at least one single-piece shell is integrated between the vacuum shell and the broken shell;
the vacuum valve and the vacuum piston are positioned on the vacuum shell, the air breaking valve and the air breaking piston are positioned on the air breaking shell, the nozzle cavity, the nozzle assembly, the first suction port, the second suction port, the suction connector, the first valve clack and the second valve clack are all arranged on each single-piece shell, each single-piece shell shares one main air inlet and one air outlet, the air inlet cavities on each single-piece shell are all communicated with each other, the air outlet cavities are all communicated with each other, and the second suction port on each single-piece shell is communicated with the external environment through one uniform suction port;
The main air inlet, the air outlet and the unified suction port are positioned on the vacuum shell or the broken shell.
Preferably, the main air inlet, the air outlet and the unified suction port are all positioned on the vacuum shell, and the air breaking valve is communicated with the main air inlet through a penetrating flow passage penetrating through the vacuum shell to the air breaking shell.
When a plurality of single-piece shells are arranged, the invention can be additionally provided with another air vent, the other air vent is communicated with the air outlet cavity through an air path, and the two air vents are respectively positioned on the vacuum shell and the broken shell.
The invention has the positive progress effects that: the invention adopts the pilot valve sheet to assemble the large-flow vacuum generator, and has the following advantages:
1. compared with other inherent vacuum generators, the device has the advantages of large flow, small volume, chip mounting, two small valve guide, piston guide and the like;
2. a plurality of Laval nozzles are arranged in the single-piece shell, and the number of the Laval nozzles can be configured according to the requirements;
3. the two alternative suction modes are widely applied.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a right side view of FIG. 1;
FIG. 3 is a left side view of FIG. 1;
FIG. 4 is a bottom view of FIG. 1;
FIG. 5 is a front view of a monolithic housing according to the present invention;
FIG. 6 is an exploded view of the monolithic housing of the present invention;
FIG. 7 is an internal cross-sectional view of a monolithic housing of the present invention;
FIG. 8 is an internal cross-sectional view of the present invention in an unguided state;
FIG. 9 is an internal cross-sectional view of the vacuum valve of the present invention under the pilot;
fig. 10 is an internal cross-sectional view of the present invention from the first to the next.
Detailed Description
In order that the manner in which the invention is practiced, as well as the features and objects and functions thereof, will be readily understood and appreciated, the invention will be further described in connection with the accompanying drawings.
Referring to fig. 1 to 10, the small valve pilot type chip-mounted integrated high-flow vacuum generator includes a generator housing including a vacuum housing 11, at least one single-piece housing 12, and a breaking housing 13, the at least one single-piece housing 12 being integrated between the vacuum housing 11 and the breaking housing 13. As shown in fig. 1, five single-piece housings 12 are arranged side by side between a vacuum housing 11 and a broken hollow housing 13, each single-piece housing 12 adopts the same structure, two sides of the assembled single-piece housings 12 are fixed with the vacuum housing 11 and the broken hollow housing 13, and the assembled single-piece housings 12 are assembled into a large-flow vacuum generator. The user can set up the number of monolithic casing 12 according to the scene demand, and during the collection dress, the bolt and nut installation through the marginal interface in four angles of monolithic casing 12 is fixed to between vacuum casing 11 and the broken shell 13.
The vacuum piston and the vacuum valve are characterized by further comprising a vacuum piston 21 arranged in the vacuum shell 11, a vacuum valve 22 used for driving the vacuum piston 21, a vacuum breaking piston 23 arranged in the vacuum shell 13 and a vacuum breaking valve 24 used for driving the vacuum breaking piston 23, wherein the vacuum valve 22 is arranged on the vacuum shell 11, and the vacuum breaking valve 24 is arranged on the vacuum shell 13. When the single-piece housing 12 is provided in plural, one vacuum piston 21 and one vacuum valve 22 are shared, and one blow-out piston 23 and one blow-out valve 24 are shared. And further comprises a main air inlet 14, a unified suction port 15 and an air outlet 16, wherein the main air inlet 14, the unified suction port 15 and the air outlet 16 can be positioned on the vacuum shell 11 or the broken shell 13. The main air inlet 14 communicated with an external air source is respectively communicated with the air inlet of the vacuum piston 21, the air inlet end of the vacuum valve 22, the air inlet of the air breaking piston 23 and the air inlet end of the air breaking valve 24 through air paths. Preferably, the main air inlet 14, the unified suction port 15 and the air outlet 16 are located on the vacuum housing 11, the air break valve 24 communicates with the main air inlet 14 through a through flow passage 241 penetrating the vacuum housing 11 to the air break housing 13, and the plurality of single-piece housings 12 share one main air inlet 14 for air intake and one air outlet 16.
Referring to fig. 5 to 7, each of the single-piece housings 12 is provided with a nozzle chamber, a nozzle assembly 31, a first suction port, a second suction port 32, a suction connector 33, two flaps 34, a lower block 35, and an upper block 36. The nozzle intracavity is equipped with four independent cavities along the air inlet to the direction of giving vent to anger of nozzle subassembly, be air inlet 371, first suction chamber 372, second suction chamber 373 and the chamber 374 of giving vent to anger respectively, nozzle subassembly 31 detachable sets up in the nozzle intracavity, the air inlet and the air inlet 371 UNICOM of nozzle subassembly 31, the gas outlet and the chamber 374 UNICOM of giving vent to anger of nozzle subassembly, be equipped with two nozzle side openings 314 on the nozzle subassembly along the air inlet to the direction of giving vent to anger respectively, the nozzle side opening 314 that is located the below communicates with first suction chamber 372, the nozzle side opening 314 that is located the top communicates with second suction chamber 373.
The first suction port communicates the first suction cavity 372 with the external environment, a suction joint 33 is arranged at the first suction port, the two valve clacks 34 are respectively a first valve clack and a second valve clack, the second suction port 32 separates the second suction port 32 from the first suction cavity 372 through the first valve clack, and the second suction port 32 separates from the second suction cavity 373 through the second valve clack. Preferably, the suction connector 33 and one of the valve flaps 34 are disposed at both sides of the rear of the air inlet of the nozzle assembly 31, the other valve flap 34 is disposed at the side of the middle of the nozzle assembly 31, and the two valve flaps 34 are disposed symmetrically. When the number of the single-piece housings 12 is plural, the air inlet cavities 371 and the air outlet cavities 374 on each single-piece housing 12 are all communicated with each other. The second suction ports 32 on each of the monolithic housings 12 communicate with each other and with the external environment through a common unified suction port 15.
The air inlet of the nozzle assembly 31 is located below, the air outlet of the nozzle assembly 31 is located above, the single-piece shell 12 is provided with a lower blocking opening, the lower blocking opening is located below the first valve clack, a lower blocking block 35 is detachably arranged on the lower blocking opening, and the lower blocking block 35 is used for blocking the first valve clack to be opened. When uniform suction through the uniform suction port 15 is not required, all the valve flaps 34 can be blocked by adopting the lower blocking piece 35, and the valve flaps 34 in part of the single-piece housing 12 can be blocked as required.
Referring to fig. 6 and 7, the nozzle assemblies 31 in the nozzle chamber are at least two groups, and at least two groups of nozzle assemblies 31 are disposed side by side in the nozzle chamber. As shown in fig. 6, three sets of nozzle assemblies 31 are disposed within the nozzle cavity of a single monolithic housing 12. The generator shell is provided with an upper blocking opening, the upper blocking opening is positioned above the air outlets of the at least two groups of nozzle assemblies 31, an upper blocking block 36 is detachably arranged on the upper blocking opening, and the upper blocking block 36 is used for blocking the air outlets of the at least one nozzle assembly 31. When not too many spray-set assemblies 31 are needed, the air outlets of portions of the nozzle assemblies 31 in a single monolithic housing 12 may be plugged by an upper plug 36.
The nozzle assembly 31 comprises a primary nozzle 311, a secondary nozzle 312 and a receiving pipe 313 which are sequentially connected from bottom to top, wherein the length of the primary nozzle 311 is smaller than that of the secondary nozzle 312, and the receiving pipe 313 is hollow and adopts a Laval nozzle. Below the primary nozzle 311 is an air inlet of the nozzle assembly 31, and above the receiving pipe 313 is an air outlet of the nozzle assembly 31. The lower part of the secondary nozzle 312 is provided with one nozzle side hole 314 communicating the inside and the outside thereof, and the lower part of the receiving pipe 313 is provided with the other nozzle side hole 314 communicating the inside and the outside thereof.
Referring to fig. 8 to 10, the air outlet end of the vacuum valve 22 is communicated with the driving port of the vacuum piston 21 through an air path, the air outlet of the vacuum piston 21 is communicated with the air inlet of the nozzle assembly 31 through an air path, and the air outlet of the nozzle assembly 31 is communicated with the external environment through the air outlet 16 through an air path. The air outlet end of the air breaking valve 24 is communicated with the driving port of the air breaking piston 23 through an air path, and the air outlet of the air breaking piston 23 is communicated with the second suction port 32 through an air path. When the single-piece housings 12 are plural, each single-piece housing 12 shares one exhaust port 16 for exhaust. Preferably, for smooth exhaust, the invention can be additionally provided with another exhaust port 16, the other exhaust port 16 is communicated with the air outlet cavity 374 through an air path, and the two exhaust ports 16 are respectively positioned on the vacuum shell 11 and the broken shell 13.
The vacuum piston 21 and the breaking piston 23 each comprise a pilot cavity arranged in the generator shell, a valve core 41 positioned in the pilot cavity and a valve rod 42 for controlling the valve port of the valve core 41 to be opened and closed, wherein the valve rod 42 is I-shaped, one end of the valve rod 42 is inserted into the valve core 41, the valve rod 42 divides the valve core 41 and the pilot cavity into an upper area 43, a middle area 44 and a lower area 45, and the middle area 44 and the lower area 45 are separated or communicated through the up-and-down movement of the valve rod 42. As shown in fig. 9, the driving port of the vacuum piston 21 is located at the upper region 43, the air outlet end of the vacuum valve 22 is in communication with the upper region 43 through an air path, the air inlet of the vacuum piston 21 is located at the middle region 44, the main air inlet 14 is in communication with the middle region 44 through an air path, the air outlet of the vacuum piston 21 is located at the lower region 45, and the air inlet chamber 371 is in communication with the lower region 45 through an air path. As shown in fig. 10, the driving port of the breaking piston 23 is located in the upper region 43, the air outlet end of the breaking valve 24 is in communication with the upper region 43 through an air path, the air outlet of the breaking piston 23 is located in the middle region 44, the second suction port 32 is in communication with the middle region 44 through an air path, the air inlet of the breaking piston 23 is located in the lower region 45, and the main air inlet 14 is in communication with the lower region 45 through an air path.
Referring to fig. 8, an external air source is supplied through the primary air inlet 14, through the air passage to the central region 44 of the vacuum piston 21 and the air inlet end of the vacuum valve 22, respectively, and the central region 44 and the lower region 45 are sealed from communication by the air pressure differential of the air acting on the valve stem 42 such that the valve stem 42 moves up against the upper wall of the pilot chamber.
Referring to fig. 9, when the vacuum valve 22 is operated, the air outlet valve port of the vacuum valve 22 is opened, the air outlet end of the vacuum valve 22 is discharged, air enters the upper region 43, the vacuum piston 21 is moved downward, the valve port at the vacuum piston 21 is opened, air enters the air inlet of the nozzle assembly 31 from the air inlet of the vacuum piston 21 through the air outlet of the vacuum piston 21, when flowing through the nozzle assembly 31, negative pressure is generated around the nozzle assembly 31, namely, high negative pressure is generated around the primary nozzle 311, low negative pressure is generated around the secondary nozzle 312, the suction joint 33 is driven to suck air, and the air pressure difference between the nozzle cavity and the second suction port 32 is such that both valve flaps 34 are opened, when the negative pressure value generated by the second suction cavity 373 is smaller than the negative pressure value of the second suction port 32, the second valve flaps are closed, and at this time the first valve flaps are still opened to realize suction. Through the design, the invention can realize two suction options through the guiding action of the vacuum valve 22, namely, the unified suction can be carried out through the unified suction port 15, and the independent suction of each single-piece shell 12 can be carried out through the suction joint 33. When any mode is needed, the suction port corresponding to the other mode is blocked.
Referring to fig. 9, an external air source is supplied through the main air inlet 14, reaches the air inlet of each of the air-break pistons 23 through the through passages 241, and communicates with the air inlet end of the air-break valve 24 through the air passage. Similarly, the middle region 44 and the lower region 45 are sealed from communication due to the air pressure differential valve stem 42 ascending.
Referring to fig. 10, when the blow-out valve 24 works, the air outlet valve port of the blow-out valve 24 is opened, the air outlet end of the blow-out valve 24 is discharged, the blow-out piston 23 is moved downwards, the valve port at the blow-out piston 23 is opened, high-pressure gas enters the second suction port 32 from the air inlet of the blow-out piston 23 through the air outlet of the blow-out valve piston 31, when the suction joint 33 is in a suction mode, the first valve clack and the second valve clack are opened by the air pressure generated by the high-pressure gas at the second suction port 32, vacuum is broken after the high-pressure gas enters the first suction cavity 372 and the second suction cavity 373, and finally the high-pressure gas is discharged from the air outlet 16 and the suction joint 33; when the second suction port 32 is in the suction mode, the first valve clack and the second valve clack are opened by the air pressure generated by the high-pressure air at the second suction port 32, the vacuum is broken after the high-pressure air enters the first suction cavity 372 and the second suction cavity 373, and finally the high-pressure air is discharged from the air outlet 16 and the second suction port 32.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a small valve guide formula piece dress integrated high-flow vacuum generator, includes the generator casing, with the main air inlet of outside air supply UNICOM, set up vacuum piston in the generator casing, be used for driving the vacuum valve of vacuum piston, a serial communication port, still include the nozzle subassembly, the nozzle subassembly detachable sets up in the nozzle intracavity in the generator casing, the nozzle intracavity is equipped with four independent cavities along the inlet to the air-out direction of nozzle subassembly, be inlet chamber, first suction chamber, second suction chamber and air-out chamber respectively, the air inlet of nozzle subassembly with inlet chamber UNICOM, the gas outlet of nozzle subassembly with the air-out chamber UNICOM, be equipped with two nozzle side openings on the nozzle subassembly along the inlet to the air-out direction respectively, lie in the below the nozzle side opening UNICOM with first suction chamber, lie in the top the nozzle side opening UNICOM with second suction chamber;
The main air inlet is respectively communicated with the air inlet of the vacuum piston and the air inlet end of the vacuum valve through an air passage, the air outlet end of the vacuum valve is communicated with the driving port of the vacuum piston through an air passage, the air outlet of the vacuum piston is communicated with the air inlet cavity through an air passage, and the air outlet cavity is communicated with the external environment through an air passage and an air outlet;
The device also comprises a first suction port and a second suction port, wherein the first suction port is communicated with the first suction cavity and the external environment, a suction connector is arranged at the first suction port, the second suction port is separated from the first suction cavity through a first valve clack, and the second suction port is separated from the second suction cavity through a second valve clack;
the external air source is introduced through the main air inlet and respectively reaches the air inlet of the vacuum piston and the air inlet end of the vacuum valve through the air path, when the vacuum valve works, the air outlet valve port of the vacuum valve is opened, the air outlet end of the vacuum valve is discharged to move the vacuum piston, the valve port at the vacuum piston is opened, air enters the air inlet of the nozzle assembly from the air inlet of the vacuum piston through the air outlet of the vacuum piston, when the air flows through the nozzle assembly, negative pressure is generated around the nozzle assembly to drive the suction joint to suck air, and the two valve clacks are opened, when the negative pressure value of the second suction cavity is smaller than the negative pressure value of the second suction port, the second valve clack is closed, and at the moment, the first valve clack is still opened to realize suction;
The air inlet of the nozzle assembly is positioned below, the air outlet of the nozzle assembly is positioned above, a lower blocking opening is formed in the generator shell, the lower blocking opening is positioned below the first valve clack, a lower blocking block is detachably arranged on the lower blocking opening, and the lower blocking block is used for blocking the first valve clack to be opened;
The air inlet of the air breaking piston and the air inlet end of the air breaking valve are respectively communicated with the air outlet end of the air breaking valve through an air passage, the air outlet end of the air breaking valve is communicated with the driving port of the air breaking piston through the air passage, and the air outlet of the air breaking piston is communicated with the second suction port through the air passage;
An external air source is used for air inflow through the main air inlet and respectively reaches an air inlet of the air breaking piston and an air inflow end of the air breaking valve through an air path, when the air breaking valve works, an air outflow valve port of the air breaking valve is opened, the air outflow end of the air breaking valve is used for air outflow, the air breaking piston is moved, a valve port at the air breaking piston is opened, and high-pressure air enters the second suction port from the air inlet of the air breaking piston through an air outlet of the air breaking piston; when the suction connector is in a suction mode, the first valve clack and the second valve clack are opened by the air pressure generated by high-pressure air at the second suction port, the vacuum is broken after the high-pressure air enters the first suction cavity and the second suction cavity, and finally the high-pressure air is discharged from the exhaust port and the suction connector; when the high-pressure gas is in a mode of sucking through the second suction port, the first valve clack and the second valve clack are opened by the gas pressure generated by the high-pressure gas at the second suction port, the high-pressure gas breaks vacuum after entering the first suction cavity and the second suction cavity, and finally the high-pressure gas is discharged from the exhaust port and the second suction port;
The vacuum piston and the emptying piston both comprise a pilot cavity arranged in the generator shell, a valve core positioned in the pilot cavity and a valve rod for controlling the valve port of the valve core to be opened and closed, the valve rod is I-shaped, one end of the valve rod is inserted into the valve core, the valve rod divides the valve core and the pilot cavity into an upper area, a middle area and a lower area, and the middle area and the lower area are separated or communicated through the up-down movement of the valve rod;
The driving port of the vacuum piston is positioned in the upper area, the air outlet end of the vacuum valve is communicated with the upper area through an air passage, the air inlet of the vacuum piston is positioned in the middle area, the main air inlet is communicated with the middle area through an air passage, the air outlet of the vacuum piston is positioned in the lower area, and the air inlet cavity is communicated with the lower area through an air passage;
The driving port of the broken air piston is located in the upper area, the air outlet end of the broken air valve is communicated with the upper area through an air passage, the air outlet of the broken air piston is located in the middle area, the second suction port is communicated with the middle area through an air passage, the air inlet of the broken air piston is located in the lower area, and the main air inlet is communicated with the lower area through an air passage.
2. The small valve pilot-operated chip-package integrated high-flow vacuum generator of claim 1, wherein said nozzle assemblies in said nozzle chamber are at least two groups, at least two groups of said nozzle assemblies being disposed side-by-side in said nozzle chamber;
the generator shell is provided with an upper blocking opening, the upper blocking opening is positioned above the air outlets of at least two groups of nozzle assemblies, an upper blocking block is detachably arranged on the upper blocking opening and is used for blocking at least one air outlet of the nozzle assemblies.
3. The small valve pilot type chip-mounted integrated high-flow vacuum generator according to claim 1, wherein the nozzle assembly comprises a primary nozzle, a secondary nozzle and a receiving pipe which are sequentially connected from bottom to top, the length of the primary nozzle is smaller than that of the secondary nozzle, and a Laval nozzle is hollow in the receiving pipe;
the lower part of the primary nozzle is an air inlet of the nozzle assembly, and the upper part of the receiving pipe is an air outlet of the nozzle assembly.
4. The pilot-operated sheet-mounted integrated high-flow vacuum generator of claim 3, wherein one of said nozzle side holes is provided at a lower portion of said secondary nozzle to communicate the inside and the outside thereof, and the other of said nozzle side holes is provided at a lower portion of said receiving pipe to communicate the inside and the outside thereof.
5. The small valve pilot-operated on-chip high flow vacuum generator of any one of claims 1-4, wherein said generator housing comprises a vacuum housing, at least one monolithic housing, and a break-out housing, at least one of said monolithic housings being integrated between said vacuum housing and said break-out housing;
The vacuum valve and the vacuum piston are positioned on the vacuum shell, the air breaking valve and the air breaking piston are positioned on the air breaking shell, the nozzle cavity, the nozzle assembly, the first suction port, the second suction port, the suction connector, the first valve clack and the second valve clack are all arranged on each single-piece shell, each single-piece shell shares one main air inlet and one air outlet, the air inlet cavities on each single-piece shell are all communicated with each other, the air outlet cavities are all communicated with each other, and the second suction port on each single-piece shell is all communicated with the external environment through one uniform suction port;
The main air inlet, the air outlet and the unified suction port are positioned on the vacuum shell or the broken shell.
6. The small valve pilot-operated chip-package integrated high-flow vacuum generator of claim 5, wherein said primary air inlet, said air outlet and said unified suction port are all located on said vacuum housing, and said blow-out valve communicates with said primary air inlet through a through flow passage extending through said vacuum housing to said blow-out housing.
7. The pilot-operated type sheet-mounted integrated large-flow vacuum generator of claim 5, wherein when a plurality of single-piece shells are arranged, another exhaust port is additionally arranged for smooth exhaust, the other exhaust port is communicated with the air outlet cavity through an air path, and the two exhaust ports are respectively positioned on the vacuum shell and the air breaking shell.
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| CN202110260701.9A CN112814957B (en) | 2021-03-10 | 2021-03-10 | Small valve pilot type sheet-mounted integrated high-flow vacuum generator |
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| CN202110260701.9A CN112814957B (en) | 2021-03-10 | 2021-03-10 | Small valve pilot type sheet-mounted integrated high-flow vacuum generator |
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| CN212563568U (en) * | 2020-06-30 | 2021-02-19 | 行益科技(宁波)有限公司 | Energy-saving vacuum generator |
| CN214698532U (en) * | 2021-03-10 | 2021-11-12 | 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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|---|---|---|---|---|
| DE10250532B3 (en) * | 2002-10-29 | 2004-07-01 | J. Schmalz Gmbh | Propellant powered ejector assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122121A (en) * | 2016-06-29 | 2016-11-16 | 南通星宇电气有限公司 | A kind of vacuum generator |
| CN207715442U (en) * | 2017-12-15 | 2018-08-10 | 宁波蓝野医疗器械有限公司 | A kind of secondary vacuum generator |
| CN109026856A (en) * | 2018-09-30 | 2018-12-18 | 浙江艾迪贝尔科技有限公司 | Compact type vacuum generator |
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