CN207080427U - Vacuum generator - Google Patents

Abstract

The utility model provides a kind of vacuum generator,Vacuum generator includes valve body and extraction sector,Valve body includes body,Body is provided with the first air inlet,Gas outlet and bleeding point,Jet pipe and diffuser pipe are provided with body,Jet pipe is provided with jet gas circuit,Diffuser pipe is provided with diffusion gas circuit,Body is provided with the first gas circuit and the second gas circuit,First gas circuit both ends connect the first air inlet and jet gas circuit respectively,Second gas circuit both ends connect jet gas circuit and diffusion gas circuit respectively,The connection gas outlet of diffusion gas circuit,Body is additionally provided with pumping air flue,Pumping air flue includes the first stomata and the second stomata being connected,Vacuum generator also includes closing means,Closing means include diaphragm and limited block,Diaphragm one end is limited block and is fixed on the step surface between the second stomata and the first stomata,Diaphragm is tilted by the suction of the second gas circuit,The air of the second stomata is set to be drawn into the first stomata,Diaphragm is covered and closed off the second stomata to maintain the vacuum of the second stomata by the suction of the second stomata.

Description

Vacuum generator

Technical field

It the utility model is related to a kind of vacuum equipment, more particularly to a kind of vacuum generator.

Background technology

Vacuum generator is widely used as a kind of economic, efficient vacuum component.Existing vacuum hair Raw device needs constantly pumping to maintain vacuum at work.Because the exhaust outlet of vacuum generator directly connects outside big Gas, motor need to be always maintained at the operating of high capacity, could maintain vacuum.Which results in very big waste, increases use Cost.

Utility model content

In view of the foregoing, it is necessary to which a kind of vacuum generator for being able to maintain that certain vacuum degree after evacuation is provided.

A kind of vacuum generator, for vacuumizing, the vacuum generator includes valve body and extraction sector, and the valve body includes this Body, the body are provided with the first air inlet, gas outlet and bleeding point, and first air inlet is used to connect air supply plant, in the body Provided with jet pipe and diffuser pipe, the jet pipe is provided with jet gas circuit, and the diffuser pipe is provided with diffusion gas circuit, the body be provided with the first gas circuit and Second gas circuit, the first gas circuit both ends connect first air inlet and the jet gas circuit respectively, and the second gas circuit both ends connect respectively The jet gas circuit and the diffusion gas circuit are connect, the other end of the diffusion gas circuit connects the gas outlet, first gas circuit, the jet gas Road, second gas circuit and the diffusion gas circuit form a ventilation air flue, and the body is additionally provided with pumping air flue, and the pumping air flue includes The first stomata and the second stomata being connected, the aperture of first stomata are more than the aperture of second stomata, and first stomata connects Lead to second gas circuit, second stomata connects the bleeding point, and the vacuum generator also includes closing means, and the closing means include Diaphragm and limited block, the diaphragm one end are fixed on the step surface between second stomata and first stomata by the limited block, The diaphragm is tilted by the suction of second gas circuit, the air of second stomata is drawn into first stomata, is stopped to the pumping After air flue pumping, the diaphragm is covered and closed off second stomata to maintain the vacuum of second stomata by the suction of second stomata Degree.

Further, first gas circuit includes tie point, the second branch road and the 3rd branch road, tie point both ends difference First air inlet and second branch road are connected, the second branch road other end connects the 3rd branch road, the 3rd branch road other end Connect the jet gas circuit.

Further, the valve body also includes top cover and diaphragm seal, and the top cover is located at the top surface of the body, and the diaphragm seal is located at Between the body and the top cover, the top surface of the body is provided with mounting hole, and the mounting hole connects second branch road and the 3rd simultaneously Branch road, the vacuum generator also include the first embolism and pressure regulating device, and first embolism is located in the mounting hole and has separated this Tie point and second branch road, the top cover are provided with the avoid holes of the face mounting hole to avoid first embolism, the pressure regulator Structure part, which is located in the top cover, to be used to control first embolism to move, to adjust the company between the tie point and second branch road Logical area.

Further, the body also sets pressure regulation air flue, and the pressure regulation air flue includes air inlet branch road, supercharging branch road and outlet branch Road, the air inlet branch road one end connect first air inlet, and the air inlet branch road other end connects the supercharging branch road and the outlet simultaneously Branch road, the supercharging branch road connect the avoid holes, and the outlet branch road connects with outside atmosphere, and the pressure regulating device part is located at the outlet In branch road, for controlling the break-make of the outlet branch road and outside atmosphere.

Further, first embolism includes the first cylinder and the second cylinder being connected, and first column diameter is more than Second cylinder, first cylinder are located in the mounting hole, and second cylinder can extend into this first in the tie point Road and second branch road are blocked.

Further, the body is additionally provided with the second air inlet and pressure release air flue, and the pressure release air flue includes the 4th branch road, the 5th Branch road, the 6th branch road and the 7th branch road, the 4th branch road one end connect second air inlet, and the other end connects the 5th branch road, 6th branch road both ends connect the 5th branch road and the pumping air flue respectively, and the top surface is additionally provided with positioning hole, and the positioning hole is simultaneously The 4th branch road and the 5th branch road are connected, the pressure relief mechanism is located in the positioning hole, is used for and is controlled the 4th branch road with being somebody's turn to do The break-make of 5th branch road.

Further, what the top cover was provided with the face positioning hole keeps away a hole, and the pressure release air flue also includes the 7th branch road, and this Seven branch roads connect the tie point and keep away a hole with this respectively, and the pressure relief mechanism includes the second embolism and the 3rd elastic component, and this second Embolism is located in positioning hole, and second embolism can separate the 4th branch road and the 5th branch road, and the 3rd elastic component is located at In 5th branch road, elasticity contradicts the body and second embolism respectively at its both ends, to promote second embolism to move, make this Four branch roads connect with the 5th branch road.

Further, the limited block includes main body, fixed part and limiting section, and the fixed part is located at the main body one end and should The step surface is fixed in diaphragm one end, and the limiting section one end is in the middle part of the main body and the parallel step surface extends to second gas Above hole, the limiting section is used for the spacing diaphragm.

Further, the body side forms a screw bosses, and the gas outlet is in the screw bosses, the screw thread Lug boss is formed with external screw thread to be threadedly coupled a muffler.

Further, the valve body also includes fixed seat, and the fixed seat is located at the bottom surface of the body, and the fixed seat is used to connect Outside workpiece.

Vacuum generator of the present utility model includes valve body, extraction sector and closing means.Closing means can close valve The part gas circuit of body saves the energy to maintain vacuum when air supply plant is stopped.

Brief description of the drawings

Fig. 1 is the schematic perspective view of the vacuum generator of embodiment of the present utility model.

Fig. 2 is the schematic perspective view of another angle of vacuum generator shown in Fig. 1.

Fig. 3 is the decomposing schematic representation of vacuum generator shown in Fig. 1.

Fig. 4 is the first broken isometric schematic diagram of vacuum generator shown in Fig. 1.

Fig. 5 is the second broken isometric schematic diagram of vacuum generator shown in Fig. 1.

Fig. 6 is sectional view of the vacuum generator shown in Fig. 2 along line VI -- VI.

Fig. 7 is the 3rd broken isometric schematic diagram of vacuum generator shown in Fig. 1.

Fig. 8 is the 4th broken isometric schematic diagram of vacuum generator shown in Fig. 1.

Fig. 9 is the 5th broken isometric schematic diagram of vacuum generator shown in Fig. 1.

Figure 10 is the 6th broken isometric schematic diagram of vacuum generator shown in Fig. 1.

Figure 11 is the 7th broken isometric schematic diagram of vacuum generator shown in Fig. 1.

Main element symbol description

Following embodiment will further illustrate the utility model with reference to above-mentioned accompanying drawing.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describe, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole realities Apply example.Based on the embodiment in the utility model, those of ordinary skill in the art institute under the premise of creative work is not made The every other embodiment obtained, belong to the scope of the utility model protection.

It should be noted that when a component is considered as " connection " another component, it can be directly to separately One component may be simultaneously present the component being centrally located.When a component is considered as " being arranged on " another component, It can be set directly on another component or may be simultaneously present the component being centrally located.

Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to technology of the present utility model The implication that the technical staff in domain is generally understood that is identical.It is simply in term used in the description of the present utility model herein The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein " and/or " include The arbitrary and all combination of one or more related Listed Items.

Also referring to Fig. 1 to Fig. 3, the present embodiment provides a kind of vacuum generator 100, for vacuumizing.Vacuum occurs Device 100 includes valve body 10, the extraction sector 20 and closing means 30 being arranged in valve body 10.

Valve body 10 includes body 12, top cover 14, diaphragm seal 16 and fixed seat 18.The substantially cuboid of body 12.Body 12 Including top surface 101, bottom surface 103 and the first side 105 and second side 107 being oppositely arranged.Top cover 14 is fixed on top surface 101 On.Diaphragm seal 16 is installed between body 12 and top cover 14.Fixed seat 18 is fixed on bottom surface 103.As shown in Fig. 2 fixed seat 18 are provided with bleeding point 181 produces negative pressure so as to which workpiece be fixed to be vacuumized to workpiece (not shown).

Also referring to Fig. 4 and Fig. 5, first side 105 is provided with the first air inlet 1052.Formed in second side 107 One screw bosses 1071, and a gas outlet 1072 is opened up in screw bosses 1071.Screw bosses 1071 are formed with outer Screw thread is used to be threadedly coupled a muffler 60.

Extraction sector 20 is in body 12.Extraction sector 20 includes jet pipe 21 and diffuser pipe 23.Jet pipe 21 and diffuser pipe 23 intervals are in body 12, and wherein jet pipe 21 is generally in the medium position of body 12.Jet pipe 21 is located at neighbouring first air inlet 1052 side.Diffuser pipe 23 is located at the side of neighbouring gas outlet 1072.The jet through its opposite end is provided with jet pipe 21 Gas circuit 212.The diffusion gas circuit 232 through its opposite end is provided with diffuser pipe 23.

The first gas circuit 1211 and the second gas circuit 1212 are additionally provided with body 12.The both ends of first gas circuit 1211 connect first respectively Air inlet 1052 and jet gas circuit 212.The other end of the one end of second gas circuit 1212 connection jet gas circuit 212, the second gas circuit 1212 are another One end connection diffusion gas circuit 232.The other end of diffusion gas circuit 232 connects gas outlet 1072.First gas circuit 1211, jet gas circuit 212, Second gas circuit 1212 and diffusion gas circuit 232 form a ventilation air flue 121.

First air inlet 1052 is used to connect an outside air supply plant to be passed through compressed gas to ventilation air flue 121.Jet The cross-sectional area of gas circuit 212 tapers into from its both ends to centre, to compress the gas being passed through, and sprays at a high speed.Diffusion gas circuit 232 cross-sectional area towards the one end of gas outlet 1072 becomes larger, and to siphon away the air of the second gas circuit 1212, forms vacuum.The Two gas circuits 1212 are also connected with being evacuated air flue 122, to be vacuumized to pumping air flue 122.

As shown in figure 5, pumping air flue 122 one end connects the second gas circuit 1212.As shown in fig. 6, the pumping other end of air flue 122 Extend to bottom surface 103 and connected with bleeding point 181 to be evacuated to workpiece.When air supply plant is supplied gas, after gas is passed through, by jet Gas circuit 212 is compressed, and produces jet and enters diffusion gas circuit 232 by the second gas circuit 1212.High-speed jet forms Entraining Effect by the The air of two gas circuits 1212 siphons away.Gas velocity reduces after being passed through diffusion gas circuit 232, and forms negative pressure, makes in pumping air flue 122 Air be supplemented to the second gas circuit 1212.

Specifically, the first stomata 1221 and the second stomata 1223 that air flue 122 includes being connected are evacuated.First stomata 1221 Aperture be more than the second stomata 1223 aperture.Step surface 1225 is formed between first stomata 1221 and the second stomata 1223.The One stomata 1221 connects the second gas circuit 1212.Second stomata 1223 connects bleeding point 181.In the present embodiment, as shown in fig. 6, the One stomata 1221 also extends to top surface 101 to install closing means 30.At work, the first opening in top surface 101 of stomata 1221 Mouth is closed by diaphragm seal 16 to ensure pumping effect.

As shown in Figure 3 and Figure 6, closing means 30 are in pumping air flue 122, for being tieed up after air supply plant is stopped Hold the vacuum of pumping air flue 122.Closing means 30 include diaphragm 32 and limited block 34.Diaphragm 32 is substantially rectangular.Diaphragm 32 The second stomata 1223 can be covered, is circulated with the gas completely cut off between the first stomata 1221 and the second stomata 1223.Limited block 34 Including main body 341, fixed part 342 and limiting section 343.The one end of diaphragm 32 located at the one end of main body 341 and is fixed on by fixed part 342 The step surface 1225.The one end of limiting section 343 is extended on the second stomata 1223 located at the middle part of main body 341 and parallel step surface 1225 Side.Limiting section 343 is used for spacing diaphragm 32.

In ventilation, the first stomata 1221 forms negative pressure.Gas in second stomata 1223 pushes up diaphragm 32, makes film The one end of piece 32 is tilted to allow gas to be passed through the first stomata 1221.Limiting section 343 is used for the tilting angle for limiting diaphragm 32.Supply gas After device is stopped, diaphragm 32 restores, and covers the second stomata 1223.First stomata 1221 passes through air flue 121 of ventilating Outside atmosphere is connected, and at the second stomata 1223 is negative pressure, diaphragm 32 is close to step surface by the suction of the second stomata 1223 1225, so as to ensure that the vacuum in the second stomata 1223.

Refer to Fig. 3, Fig. 4 and Fig. 7, in the present embodiment, vacuum generator 100 also includes the first embolism 41 and pressure regulating device 43, the break-make and regulation vacuum of air flue 121 of being ventilated with control.

The part of first embolism 41 is stretched into the first gas circuit 1211.Pressure regulating device 43 is used for the first embolism 41 of regulation and stretches into first The volume size of the part of gas circuit 1211, the gas flow for being passed through ventilation air flue 121 is controlled with this, so as to adjust vacuum.

Specifically, as shown in figure 4, the first gas circuit 1211 is also including tie point 1201, the second branch road 1202 and the 3rd Road 1203.The both ends of tie point 1211 connect the first air inlet 1052 and the second branch road 1202 respectively.Second branch road 1202 is another The 3rd branch road 1203 of end connection.The other end of 3rd branch road 1203 connection jet gas circuit 212.The near normal top surface of second branch road 1202 101 are set.Second branch road 1202 and the 3rd branch road 1203 substantially form L-type, and the 3rd branch road 1203 is close to top surface 101.Such as Fig. 3 Shown in Fig. 4, top surface 101 is provided with mounting hole 1012.Mounting hole 1012 connects the second branch road 1202 and the 3rd branch road simultaneously 1203.Top cover 14 is additionally provided with the avoid holes 141 of face mounting hole 1012.By diaphragm seal between mounting hole 1012 and avoid holes 141 16 have separated gas circulation.

First embolism 41 includes connected the first cylinder 412 and the second cylinder 414.The diameter of first cylinder 412 is more than second Cylinder 414.First cylinder 412 is located in mounting hole 1012.Second cylinder 414 is stretched into tie point 1214, has separated first The connectivity part of the branch road 1215 of branch road 1214 and second.After the first air inlet 1052 is passed through gas, gas pushes against the second cylinder 414, make the first cylinder 412 pushing and pressing diaphragm seal 16 and enter avoid holes 141, the second cylinder 414 no longer separates tie point 1214 With the second branch road 1215.After the first air inlet 1052 stops being passed through gas, the first embolism 41 is fallen by Action of Gravity Field, and makes the Two cylinders 414 separate the branch road 1215 of tie point 1214 and second again.

Fig. 7 and Fig. 8 are referred to, body 12 is additionally provided with pressure regulation air flue 123.Pressure regulation air flue 123 includes air inlet branch road 1231, increased Press branch road 1232 and outlet branch road 1234.The one end of air inlet branch road 1231 also connects the first air inlet 1052.Air inlet branch road 1231 is another One end connects supercharging branch road 1232 and outlet branch road 1234 simultaneously.It is pressurized branch road 1232 and connects avoid holes 141.Outlet branch road 1234 Second side 107 is extended to, is connected with outside atmosphere.The part of pressure regulating device 43 is located in outlet branch road 1234, for controlling out Gas branch road 1234 and the break-make and gas flow of outside atmosphere.In the present embodiment, current limliting nail is additionally provided with air inlet branch road 1231 1235.Current limliting nail 1235 is used to control the throughput for leading to supercharging branch road 1232 and outlet branch road 1234.

When outlet branch road 1234 and ft connection, after the first air inlet 1052 is passed through gas, the cylinder of gas push second 414 make tie point 1214 be connected with the second branch road 1215.

When outlet branch road 1234 is with outside separate, portion gas enters avoid holes 141 by supercharging branch road 1232, makes avoidance Hole 141 produces malleation, and the thrust for making the first cylinder 412 be moved by the second branch road 1202 downwards.Due to pressure regulation air flue 123 The first air inlet 1052 is all connected with ventilation air flue 121, the air pressure at avoid holes 141 and the air pressure phase at the second branch road 1202 Together.The section of first cylinder 412 is more than the section of the second cylinder 414, the downward thrust that the first cylinder 412 is subject to is more than the The upward thrust that two cylinders 414 are subject to, so that the second cylinder 414 can separate the second branch road 1202 under different air pressure With the 3rd branch road 1203, so as to close ventilation air flue 121, air inlet is closed.

Pressure regulating device 43 can also adjust the gas flow size that outlet branch road 1234 leads to outside, to adjust avoid holes Pressure size at 141, and then change the downward thrust size that the first cylinder 412 is subject to.Because what the second cylinder 414 was subject to Upward thrust size is constant, therefore pressure regulating device 43 can change position of second cylinder 414 in mounting hole 1012, so as to change Become the second branch road 1202 and connect area to control the gas flow of ventilation air flue 121, so as to adjust vacuum with the 3rd branch road 1203 The vacuum of generator 100.

Also referring to Fig. 4, Fig. 7 and Fig. 8, pressure regulating device 43 include airway tube 431, the first elastic component 432, ball 433, Fixed seat 434, the knob 436 of thimble 435 and the second elastic component 437.Airway tube 431 is located in body 12, and has separated outlet branch Road 1234 and the connection of outside atmosphere.Airway tube 431 is hollow cylinder, is internally provided with air guide branch road 4312.Air guide branch road 4312 one end connection outlet branch road 1234, other end connection outside atmosphere.First elastic component 432 is in outlet branch road 1234. The one end of first elastic component 432 is connected to body 12, and the other end stretches into air guide branch road 4312.Ball 433 is installed in the first elastic component 432 stretch into one end of air guide branch road 4312.Ball 433 is promoted by the first elastic component 432 and supports airway tube 431, by air guide branch road 4312 closings, while outlet branch road 1234 is separated with outside atmosphere.Top surface 101 is additionally provided with receiving hole 1014.Receiving hole 1014 Above airway tube 431.Fixed seat 434 is movably arranged on receiving hole 1014, and the top gluing, sealing film 16 of fixed seat 434. Top cover 14 is provided with fixing hole 143.The face receiving hole 1014 of fixing hole 143 is moved with avoiding fixed seat 434.The one end of thimble 435 Fixed seat 434 is fixed on, the other end of thimble 435 stretches into air guide branch road 4312 and contradicts ball 433.Knob 436 is bolted in fixation Hole 143, while fixing hole 143 is closed.The one end of second elastic component 437 elasticity contradicts knob 436.Second elastic component 437 is another End elasticity contradicts diaphragm seal 16 and fixed seat 434.Second elastic component 437 can be pushed by turn knob 436, make the second elasticity Part 437 pushes against fixed seat 434, and pushes against ball 433 away from airway tube 431 by thimble 435.Ball 433 is away from airway tube 431 Afterwards, outlet branch road 1234 connects with air guide branch road 4312, and connects outside atmosphere.By adjusting ball 433 and airway tube 431 Distance, the gas flow for being passed through outside atmosphere can be controlled, so that vacuum changes.

Refer to Fig. 9 to Figure 11, in the present embodiment, vacuum generator 100 also includes pressure relief mechanism 50.Pressure relief mechanism 50 is set In body 12, for destroying the vacuum of pumping air flue 122.

Referring to Fig. 9, body 12 is additionally provided with the second air inlet 1054 and pressure release air flue 124.Please referring also to Fig. 1, second Air inlet 1054 is opened in first side 105, and closes on the first air inlet 1052.

As shown in Figure 9 and Figure 10, pressure release air flue 124 includes the 4th branch road 1241, the 5th branch road 1242 and the 6th branch road 1243.4th branch road 1241 and the 5th branch road 1242 are substantially L-shaped.The both ends of 4th branch road 1241 connect the second air inlet respectively 1054 and the 5th branch road 1242.The near normal top surface 101 of 5th branch road 1242.6th branch road 1243 is substantially L-shaped, its both ends point Lian Jie not the 5th branch road 1242 and pumping air flue 122.

It is appreciated that pressure release air flue 124 is not limited to include the 4th branch road 1241, the 5th branch road 1242 and the 6th branch road above 1243, as long as pressure release air flue 124 can connect the second air inlet 1054 and pumping air flue 122 respectively, with into pumping air flue 122 It is passed through air.The part of pressure relief mechanism 50 is stretched into pressure release air flue 124, to control the break-make of pressure release air flue 124.

As shown in Figure 10 and Fig. 3, top surface 101 is provided with positioning hole 1016.Positioning hole 1016 simultaneously with the 4th branch road 1241 and 5th branch road 1242 connects.Top cover 14 keeps away a hole 145 provided with face positioning hole 1016.Positioning hole 1016 is with keeping away a hole 145 Between separated by diaphragm seal 16.

Pressure relief mechanism 50 includes the second embolism 52 and the 3rd elastic component 54.Second embolism 52 is located in positioning hole 1016, its Including connected the 3rd cylinder 521 and the 4th cylinder 523.The diameter of 3rd cylinder 521 is more than the diameter of the 4th cylinder 523.The Four cylinders 523 separate the 4th branch road 1241 and the 5th branch road 1242.3rd elastic component 54 is located in the 4th branch road 1241.3rd Elasticity contradicts the cylinder 521 of body 12 and the 3rd to the both ends of elastic component 54 respectively, the second embolism 52 is promoted to a hole 145 is kept away, simultaneously The 4th branch road 1241 is set to be connected with the 5th branch road 1242.

Referring to Fig. 9, body 12 is additionally provided with the 7th branch road 1244.7th branch road 1244 is substantially L-shaped, its one end connection the The other end of one branch road 1201 keeps away a hole 145 through the connection of diaphragm seal 16.

When air flue 121 of ventilating is passed through gas, gas is entered by the branch road 1244 of tie point 1201 and the 7th keeps away a hole 145, make to keep away the air pressure increase of a hole 145.The second embolism of gas push 52 compresses the 3rd elastic component 54 to the direction of the 5th branch road 1242 It is mobile, while the 4th branch road 1241 is separated with the 5th branch road 1242.

In the present embodiment, the second air inlet 1054 can connect an outside blowning installation, by the way that gas is passed through into pumping air flue 122 so that vacuum to be destroyed rapidly.

In the present embodiment, as shown in Figure 10, pressure release air flue 124 also includes the 8th branch road 1245.The one end of 8th branch road 1245 Connect one end of 1243 neighbouring pumping air flue 122 of the 6th branch road.As shown in figure 11, the other end of the 8th branch road 1245 is connected hole 143.In the present embodiment, the 8th branch road 1245 includes the first branch 1246, the second branch 1247 and the 3rd branch 1248.First point The both ends of road 1246 connect the 6th branch road 1243 and the second branch 1247 respectively.The other end of second branch 1247 connects the 3rd branch 1248.The other end of 3rd branch 1248 extends to top surface 101.The 9th branch road 147 is additionally provided with top cover 14.9th 147 liang of branch road End connects the 3rd branch 1248 and fixing hole 143 respectively.It is appreciated that in other embodiments, the 9th branch road 147 can take Disappear, fixing hole 143 is directly connected to by the 8th branch road 1245；In addition, the 8th branch road 1245 is also not necessarily limited to include the first branch above 1246th, the second branch 1247 and the 3rd branch 1248, as long as it can connect the 9th branch road 147.

When the second air inlet 1054 is passed through gas, portion gas is entered by the 8th branch road 1245 and the 9th branch road 147 Fixing hole 143, increase the air pressure of fixing hole 143.Gas push fixed seat 434 moves down, and thimble 435 is promoted ball 433, pressure regulation air flue 123 is connected with outside atmosphere, to discharge the pressure of pressure regulation air flue 123.

Referring to Fig. 1, in the present embodiment, muffler 60 is bolted in screw bosses 1071, to reduce high velocity air discharge When noise.

Vacuum generator 100 of the present utility model includes valve body 10, extraction sector 20 and closing means 30.Closing means 30 The energy can be saved with the part gas circuit of closed valve 10 to maintain vacuum when air supply plant is stopped.

It is appreciated that in other embodiments, fixed seat 18 can be cancelled, it is directly arranged in by bleeding point 181 on body 12.

It is appreciated that in other embodiments, it need not such as adjust vacuum, the first embolism 41 and pressure regulating device 43 and phase The pressure regulation air flue 123 answered can be cancelled.Rapid damage vacuum is not needed such as, and pressure relief mechanism 50 can take with pressure release air flue 124 Disappear.In the case where not setting the first embolism 41, pressure regulating device 43 and pressure relief mechanism 50, then top cover 14 can take with diaphragm seal 16 Disappear.

In addition, those skilled in the art can also do other changes in the utility model spirit, certainly, these are according to this reality The change made of new spirit, it should all be included in the utility model scope claimed.

Claims (10)

1. a kind of vacuum generator, for vacuumizing, the vacuum generator includes valve body and extraction sector, and the valve body includes this Body, the body are provided with the first air inlet, gas outlet and bleeding point, and first air inlet is used to connect air supply plant, and its feature exists In：Jet pipe and diffuser pipe are provided with the body, the jet pipe is provided with jet gas circuit, and the diffuser pipe is provided with diffusion gas circuit, and the body is set There are the first gas circuit and the second gas circuit, the first gas circuit both ends connect first air inlet and the jet gas circuit respectively, second gas Road both ends connect the jet gas circuit and the diffusion gas circuit respectively, and the other end of the diffusion gas circuit connects the gas outlet, first gas Road, the jet gas circuit, second gas circuit and the diffusion gas circuit form a ventilation air flue, and the body is additionally provided with pumping air flue, should Pumping air flue includes the first stomata and the second stomata being connected, and the aperture of first stomata is more than the aperture of second stomata, First stomata connects second gas circuit, and second stomata connects the bleeding point, and the vacuum generator also includes closing means, should Closing means include diaphragm and limited block, and the diaphragm one end is fixed between second stomata and first stomata by the limited block Step surface on, the diaphragm by second gas circuit suction tilt, the air of second stomata is drawn into first stomata, stop After being only evacuated to the pumping air flue, the diaphragm by the suction of second stomata covered and closed off second stomata with maintain this second The vacuum of stomata.

2. vacuum generator as claimed in claim 1, it is characterised in that：First gas circuit includes tie point, the second branch road And the 3rd branch road, the tie point both ends connect first air inlet and second branch road respectively, the second branch road other end connects The 3rd branch road is connect, the 3rd branch road other end connects the jet gas circuit.

3. vacuum generator as claimed in claim 2, it is characterised in that：The valve body also includes top cover and diaphragm seal, the top cover Located at the top surface of the body, the diaphragm seal is located between the body and the top cover, and the top surface of the body is provided with mounting hole, the installation Hole connects second branch road and the 3rd branch road simultaneously, and the vacuum generator also includes the first embolism and pressure regulating device, and this first Embolism is located in the mounting hole and has separated the tie point and second branch road, and the top cover is provided with the avoidance of the face mounting hole To avoid first embolism, the pressure regulating device part, which is located in the top cover, to be used to control first embolism to move, should with regulation in hole Connection area between tie point and second branch road.

4. vacuum generator as claimed in claim 3, it is characterised in that：The body also sets pressure regulation air flue, the pressure regulation air flue bag Include air inlet branch road, supercharging branch road and outlet branch road, the air inlet branch road one end and connect first air inlet, the air inlet branch road other end The supercharging branch road and the outlet branch road are connected simultaneously, the supercharging branch road connects the avoid holes, and the outlet branch road connects with outside atmosphere Logical, the pressure regulating device part is located in the outlet branch road, for controlling the break-make of the outlet branch road and outside atmosphere.

5. vacuum generator as claimed in claim 3, it is characterised in that：First embolism include the first cylinder for being connected with Second cylinder, first column diameter are more than second cylinder, and first cylinder is located in the mounting hole, and second cylinder can Stretch into the tie point so that the tie point and second branch road is blocked.

6. vacuum generator as claimed in claim 3, it is characterised in that：The body is additionally provided with the second air inlet and pressure release gas Road, the pressure release air flue include the 4th branch road, the 5th branch road, the 6th branch road and the 7th branch road, the 4th branch road one end connect this Two air inlets, the other end connect the 5th branch road, and the 6th branch road both ends connect the 5th branch road and the pumping air flue respectively, should Top surface is additionally provided with positioning hole, and the positioning hole connects the 4th branch road and the 5th branch road simultaneously, and the pressure relief mechanism is located at the positioning Kong Zhong, it is used for and controls the break-make of the 4th branch road and the 5th branch road.

7. vacuum generator as claimed in claim 6, it is characterised in that：What the top cover was provided with the face positioning hole keeps away a hole, The pressure release air flue also includes the 7th branch road, and the 7th branch road connects the tie point and keeps away a hole with this respectively, the pressure relief mechanism bag The second embolism and the 3rd elastic component are included, second embolism is located in positioning hole, and second embolism can be by the 4th branch road with being somebody's turn to do 5th branch road separates, and the 3rd elastic component is located in the 5th branch road, and elasticity contradicts the body and second bolt respectively at its both ends Plug, to promote second embolism to move, the 4th branch road is set to be connected with the 5th branch road.

8. vacuum generator as claimed in claim 1, it is characterised in that：The limited block includes main body, fixed part and limiting section, The step surface located at the main body one end and is fixed in the diaphragm one end by the fixed part, and the limiting section one end is in the middle part of the main body And the parallel step surface is extended to above second stomata, the limiting section is used for the spacing diaphragm.

9. vacuum generator as claimed in claim 1, it is characterised in that：The body side forms a screw bosses, and this goes out Gas port is in the screw bosses, and the screw bosses are formed with external screw thread to be threadedly coupled a muffler.

10. vacuum generator as claimed in claim 1, it is characterised in that：The valve body also includes fixed seat, and the fixed seat is located at The bottom surface of the body, the fixed seat are used to connect outside workpiece.