CN105569983A

CN105569983A - Safe vacuumizing environmental protection pump

Info

Publication number: CN105569983A
Application number: CN201610043583.5A
Authority: CN
Inventors: 徐伟正
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-01-24
Filing date: 2016-01-24
Publication date: 2016-05-11

Abstract

The invention discloses a safe vacuumizing environmental protection pump, and belongs to the field of vacuum servo and the field of vacuum exhaust of vehicle braking. An electromagnetic coil is mounted in a protection shell, and is out of the lower surface part of a negative-pressure shell; an annular inner end of the protection shell is fixed out of the negative-pressure shell; an exhaust valve is fixed in a center hole of the negative-pressure shell; a push spring and a magnetic piston are arranged in the negative-pressure shell; the push spring is pressed on the magnetic piston; a hole-less sealing plate seals an exhaust cavity; a hole sealing plate seals an exhaust channel of an air extruding cavity; an air separation limiting plate is fixed in a limiting hole at the upper end of the magnetic piston; and a sealing cone or a sealing ball is mounted in an inner taper hole of the magnetic piston. The safe vacuumizing environmental protection pump is compact in structure, low in vibration, strong in power, high in utilization rate of electric energy, high in vacuumizing efficiency, suitable for installation of internal combustion engine-driven vehicles and electric vehicles and industrial vacuumizing, excellent in market prospect and in favor of industrial production.

Description

Safety vacuumizes environment protecting pump

Technical field

The present invention relates to a kind of safety for producing vacuum power and industrial extracting vacuum to the vacuum booster of the brake master cylinder of automobile and vacuumize environment protecting pump.

Background technique

Traditional vacuum pump adopts bias to lay eggs formula, lays eggs to produce suction when rotated and carry out bleeding and vacuum.

Summary of the invention

The object that the present invention relates to is a kind of manufacture and the method thereof that vacuum safety vacuumizes environment protecting pump in order to provide electromagnetic linear to pull piston movement to bleed.

For achieving the above object, safety of the present invention vacuumizes environment protecting pump and mainly comprises protecting crust, electromagnetic coil, negative pressure shell, bleeder hole, exhaust tube, atresia sealing plate, porose sealing plate, sealing cone or ball sealer, limited cap, promotion spring, answers magnetic piston, point gas confinement plate, internal taper hole, vent, gas outlet valve, field controller; Or described safety vacuumizes environment protecting pump and mainly comprises protecting crust, electromagnetic coil, negative pressure shell, bleeder hole, exhaust tube, atresia sealing plate, porose sealing plate, sealing cone or ball sealer, limited cap, promotion spring, answers magnetic piston, point gas confinement plate, internal taper hole, vent, gas outlet valve, field controller, electronic remote controller.

In protecting crust, be provided with electromagnetic coil, electromagnetic coil is fixed on the lower part outside negative pressure shell, and protecting crust is fixed on the outside protection electromagnetic coil of the bottom of negative pressure shell; Below the outside of protecting crust, one side is fixed with foot rest, and the lower end of foot rest is fixed on vacuum tank, and the lower end of foot rest is lower than the position of the bleeder hole of negative pressure shell lower end.

The circuit connecting electromagnetic coil is connected with field controller, and the circuit of field controller is connected with insulated electric conductor, and insulated electric conductor is connected with teacher position key operation, and field controller is arranged in protecting crust; Or, the circuit connecting electromagnetic coil is connected with field controller, the circuit of field controller is connected with electronic remote controller, electronic remote controller is connected with insulated electric conductor, insulated electric conductor is connected with teacher position key operation, and the electronic signal receiver of field controller, electronic remote controller and electronic remote controller is arranged in protecting crust.

Be provided with in negative pressure shell atresia sealing plate, limited cap, porose sealing plate, promote spring, answer magnetic piston, point gas confinement plate, promote the lower part of spring fitting at the inner chamber of negative pressure shell, answer magnetic piston to be arranged on the upper part of the inner chamber of negative pressure shell, promote spring top and be pressed in the lower end of answering magnetic piston; Answering the spacing hole internal fixtion of the upper end portion of magnetic piston to have a point water confinement plate, answer magnetic piston can slide up and down in the inner chamber of negative pressure shell; A point gas confinement plate is had answering the spacing hole internal fixtion of magnetic piston upper end, the annular sealing surface of the sealing neck end in point compression of answering the upper part of magnetic piston is provided with porose sealing plate, porose sealing plate can move up and down between annular sealing surface and point gas confinement plate, and porose sealing plate coordinates the bleed-off passage that can seal or open the squish chamber entered in negative pressure shell with answering the annular sealing surface of magnetic piston; Be provided with atresia sealing plate in closed hole in the sealing neck of the lower end in negative pressure shell, limited cap is fixed on the outside of sealing neck by screw thread or jump ring; The air inlet that atresia sealing plate can seal with the closed hole cooperation in the sealing neck of negative pressure shell lower end or open the pumping chamber entered in negative pressure shell is led to; When answering magnetic piston stroking upward, the inner chamber part of answering the negative pressure shell of magnetic piston lower part is pumping chamber; When answering magnetic descent of piston, the inner chamber part of the negative pressure shell of magnetic piston upper part is answered to be squish chamber.Be fixed with exhaust tube at the bleeder hole place of the lower end of negative pressure shell, the other end of exhaust tube is connected with vacuum tank, and the endoporus of exhaust tube communicates with bleeder hole and vacuum tank; Be provided with gas outlet valve in the upper end of negative pressure shell, the lower part of gas outlet valve is fixed in the center hole of the overlying one end of negative pressure shell.

The material of described protecting crust is the material of a type in metal, plastics, nylon, glass fibre reinforced plastics or the composite material of several types; The material of a type in material employing metal, plastics, nylon and the glass fibre reinforced plastics of hollow valve body and negative pressure shell or the composite material of several types; The material of a type in material employing metal, plastics, nylon and the rubber of sealing cone and ball sealer or the composite material of several types; Atresia sealing plate and porose sealing plate material adopt the material of a type in metal, plastics, nylon and glass fibre reinforced plastics or the composite material of several types; The material of magnetic piston is answered to be can the material of hard to bear magnetic field suction.

Described protecting crust is the hollow cavity of annular, hollow cavity has string holes, is provided with electromagnetic coil and field controller in hollow cavity, or, electromagnetic coil, field controller and electronic remote controller are installed in hollow cavity; The inner of the annular housing of hollow cavity is fixed on negative pressure shell; String holes is the hole allowing insulated electric conductor pass.

For the ease of protecting crust processing and be convenient to accessory to load in protecting crust, described protecting crust is the assemblying body after segmentation, and after the annular position of protecting crust is divided into two parts, recombinant is together.

The inner chamber of described negative pressure shell is circular cylindrical cavity, and the cylndrical surface of columniform cavity is smooth curved surface; Upper end on the center line of inner chamber has that center hole passes negative pressure shell, lower end has bleeder hole to pass negative pressure shell; There is sealing neck protruding upward at the middle part of the lower end in negative pressure shell, the upper part of the inside of sealing neck is closed hole, lower part is bleeder hole, the time in of not installing atresia sealing plate in closed hole, closed hole communicates with bleeder hole, closed hole and atresia sealing plate below one side coordinate.

Described gas outlet valve comprises hollow valve body and sealing is bored or ball sealer, and hollow valve body is hollow tubular, and internal taper hole is in the middle part of the inner chamber of hollow tubular or middle and lower part, and the internal diameter of the upper part of the internal taper hole in hollow tubular internal diameter that is large, lower part is little; There is return-air sealed end the lower end of hollow valve body, the lower end surface of return-air sealed end in the lower end of hollow valve body, upper-end surface is internal taper hole, the large end of internal taper hole communicates with the upper end of gas outlet valve, small end communicates with the lower end of gas outlet valve, and the inner conical surface of internal taper hole is provided with sealing cone or ball sealer.Described internal taper hole is the circular hole having tapering, the face of circular hole is inner conical surface, inner conical surface and the mating spherical surfaces sealing male cone (strobilus masculinus) or the ball sealer of boring, can inner conical surface be sealed under the effect of the gravity of sealing cone or ball sealer self, inner conical surface can be opened with sealing by suction when cone or ball sealer have above suction and bore or the passage of ball face sealing of ball sealer sealing; The air pressure sealed above cone or ball sealer is larger, and the gluing, sealing effect of sealing cone or ball sealer and inner conical surface is better; Can open when being with the air of pressure from the endoporus of hollow valve body lower end inner conical surface with sealing bore or ball sealer sealing and form passage.

For the ease of negative pressure shell processing and be convenient to accessory to load in negative pressure shell, described negative pressure shell is the assemblying body after segmentation; The upper end of the circular cylindrical cavity part in negative pressure shell is divided into two sections, the main body that the upper part of segmentation place is pump cover, lower part is negative pressure shell, center hole is on pump cover, and bleeder hole is at the middle part of the main body lower end of negative pressure shell, and the body combination of pump cover and negative pressure shell becomes a composite entity; Or, the lower end of the circular cylindrical cavity part in negative pressure shell is divided into two sections, the main body that the lower part of segmentation place is pump cover, upper part is negative pressure shell, bleeder hole is at the middle part of pump cover, center hole is at the middle part of the upper end of the main body of negative pressure shell, and the body combination of pump cover and negative pressure shell becomes a composite entity.

Described magnetic piston of answering is columniform iron core, the limited location hole, position of the center line of columniform iron core, point compression and vent; The limited location hole, upper end of columniform iron core is a point compression below spacing hole, is vent below the middle part of point compression; The inner ring of point compression is sealing neck, and the inside of sealing neck is one section above of vent, and the annular sealing surface of sealing neck upper end is lower than the upper end of the periphery of point compression; The annular sealing surface at top sealing neck is not installed porose sealing plate and porose sealing plate when seal with annular sealing surface, vent communicates with answering the compression that divides of magnetic piston upper end; Spacing hole is used for a fixing point of gas confinement plate, and point compression is for disperseing the air that passes through and guiding air to enter air passing hole on porose sealing plate; The periphery of columniform iron core is smooth periphery, and smooth periphery has the annular groove of depression, and annular groove is embedded with seal ring; Periphery coordinates with the inner chamber of negative pressure shell can the inner chamber of sealed negative-pressure shell, and can slide in the inner chamber of negative pressure shell.Described spacing hole is the rounded face of circular hole circular hole is inlay a point gas confinement plate stationary plane, and the annular bottom surface of circular hole is the face that restriction point gas confinement plate inlays the degree of depth; A described point compression is divided into two sections, and the upper part of sealing neck is circular hole, and the exterior portion of sealing neck is the groove of ring, and the periphery of the periphery of circular hole and the groove of ring is connected, and circular hole communicates with vent; Described vent is the hole communicated with point compression.

Described annular sealing surface is the smooth sealing surface of ring, annular sealing surface answer the upper end of the sealing neck of magnetic piston and porose sealing plate sealing surface coordinate.

Described porose sealing plate is dull and stereotyped, and the part that below dull and stereotyped, the intermediate portion of one side coordinates with annular sealing surface is sealing surface, and the part beyond dull and stereotyped sealing surface coordinates with annular sealing surface has passing hole, and passing hole is used for allowing gas pass through.

A described point of gas confinement plate is the plate having air passing hole, and the anchor ring being embedded in spacing hole is adjacent to the base ring face of spacing hole; Air passing hole is used for allowing air pass through.

Described sealing cone is cone or cone cylinder, and the periphery of cone or cone cylinder is smooth male cone (strobilus masculinus); The male cone (strobilus masculinus) of sealing cone and inner conical surface press down by the self gravitation sealing conisphere and seal inner conical surface when sealing.

Described ball sealer is spherosome or oval ball, and the periphery of spherosome or oval ball is sealing surface, and sealing surface is smooth sphere; To bore or the self gravitation of ball sealer presses down and seals inner conical surface by sealing when sealing cone or the sphere of ball sealer and inner conical surface seal.

Described closed hole is circular hole, above the bleeder hole in the sealing neck of the lower end in negative pressure shell, the rounded face of circular port be hold atresia sealing plate inner headed face or internal conical surface, the annular bottom surface of the circular hole of closed hole is sealing surface.

Described atresia sealing plate is circular flat board, and below dull and stereotyped, one side is sealing surface, and sealing surface coordinates with the closed hole in the sealing neck of negative pressure shell lower end.

Described limited cap is calotte, and the crown of calotte part has the air passing hole allowing gas pass through, and the hatband partial fixing of calotte can limit the distance of moving on the atresia sealing plate installed in sealing neck on sealing neck.

Described field controller controls the controller that generates an electromagnetic field of electromagnetic coil, control time and the time length generated an electromagnetic field that electromagnetic field produces and after generating an electromagnetic field at every turn to the interval time generated an electromagnetic field again for the second time.

In order to prevent robber from stealing automobile easily, not having vacuum servo when robber is driven a car and stopping stealing garage is adopt installing remote device between teacher position key operation and field controller to connect and cut off the power-on circuit generated an electromagnetic field; Described electronic remote controller connects and cuts off the circuit switch generated an electromagnetic field, and comprise the switch sections and electronic telecontrol part that switch on or off circuit, electronic telecontrol part comprises remote controller switch and electronic signal receiver; Remote controller switch is used for driver and carries with, and is convenient to pilot control and vacuumizes safely the normal work of environment protecting pump and cut off the control circuit that safety vacuumizes environment protecting pump; Described electronic remote controller can have in the present invention, also can not have.

Described exhaust tube connects the bleeder hole of negative pressure shell and the hollow tubular of vacuum tank.

Described bleeder hole be in air enters in negative pressure shell squish chamber through via hole, at the lower part in the center portion of sealing neck; The time in of not installing atresia sealing plate in closed hole, the closed hole on the sealing neck of protecting crust lower end communicates with bleeder hole.

The air extracted in vacuum tank is laid in and is waited to press in pumping chamber, extrudes air and produce air pressure and discharge outside negative pressure shell in squish chamber; In squish chamber during exhaust, pumping chamber communicates with squish chamber; When discharging air in squish chamber, pumping chamber is by sealing cone or ball sealer and answer the internal taper hole in magnetic piston seal and disconnect the bleed-off passage entering squish chamber.

Described safety vacuumizes environment protecting pump in the process of exhaust, and controlling does not have return spring in the one-way check valve of exhaust passage and deaeration passage; When pumping chamber exhaust, the suction of answering magnetic piston stroking upward to produce opens exhaust opened by atresia sealing plate passage with the sealing of the closed hole in the sealing neck of the lower end in negative pressure shell, the porose sealing plate being arranged on the sealing neck upper end of answering on magnetic piston automatic decline return and the passage of closing the exhaust entered in squish chamber seals under the effect of self gravitation; When squish chamber exhaust, be arranged on the sealing cone of the internal taper hole of gas outlet valve or ball sealer to utilize the air pressure official post outside self gravity and squish chamber and negative pressure shell to seal to bore or ball sealer decline return and the passage of closing the extrusion air on gas outlet valve seals automatically, answer magnetic descent of piston and make to produce in pumping chamber the up passage then opening the exhaust entered in squish chamber of porose sealing plate that pressure promotes to be arranged on the sealing neck upper end of answering magnetic piston; When giving vent to anger in squish chamber, under the effect of outlet pressure, promote sealing cone on the internal taper hole of gas outlet valve or ball sealer up and open the passage of giving vent to anger of gas outlet valve, answer magnetic descent of piston and make in pumping chamber, to produce the up passage then opening the exhaust entered in squish chamber of porose sealing plate that pressure promotes to be arranged on the sealing neck upper end of answering magnetic piston.

In order to ensure that safety vacuumizes environment protecting pump and can normally work, the teacher position key operation connected with insulated electric conductor is adopted to control connection and the cut-out of the connecting circuit of electromagnetic coil; Or, adopt connection and the cut-out of the connecting circuit of teacher position key operation and the electronic remote controller co-controlling electromagnetic coil connected with insulated electric conductor.

Keep shape in order to ensure protecting crust to protect electromagnetic coil and be not easy distortion, the cavity of protecting crust manufactures the skeleton having support.

Air in the squish chamber promoting in negative pressure shell to enable to answer magnetic piston enters gas outlet valve, adopts and promotes spring as promoting to answer magnetic piston stroking upward to compress air in squish chamber in air pressure air valve.

During use, do not have electronic remote controller, teacher of the opening position key operation directly connects the power-on circuit of insulated electric conductor and field controller; Have electronic remote controller, press the starting button of remote controller switch after the key of teacher of the opening position, the circuit of electronic remote controller and field controller connected by electronic signal receiver after receiving activating signal; The power-on circuit that field controller connects electromagnetic coil generates an electromagnetic field; The attraction force that electromagnetic field produces pulls the pressure of answering magnetic piston overpowers to promote spring to move down, when answering magnetic piston to start descending, the bleed-off passage entering pumping chamber is closed under the effect of the pull of vacuum of atresia sealing plate under the effect of self gravitation and in vacuum tank of installing in the sealing neck of negative pressure shell lower end, descending return under the effect of the sealing cone in gas outlet valve or the draught head of ball sealer under the effect of the gravity of self and inside and outside negative pressure shell and seal the inner conical surface of gas outlet valve, has cut off the outlet passageway in squish chamber; Answer magnetic piston when descending, the air of answering magnetic piston to promote to enter in pumping chamber and make air produce internal pressure, have the air of pressure from the upper end of answering the vent of magnetic piston to enter into sealing neck upwards wash open annular sealing surface and porose sealing plate sealing and porose sealing plate be shifted continue afterwards up, divide the passing hole on air drain, porose sealing plate through annular and enter in squish chamber after dividing the air passing hole on gas confinement plate.

Answer magnetic descent of piston move to compression promote the compression stage of spring spacing time, the power-on circuit of field controller cutoff solenoid, electromagnetic field disappears, and answers magnetic piston up under the promotion promoting spring; When answering magnetic piston to start up, be arranged on and answer the porose sealing plate of the sealing neck upper end of magnetic piston descending and close the bleed-off passage that air enters squish chamber under the effect of the gravity of self; When answering magnetic piston stroking upward, answer the up of magnetic piston and make the air in squish chamber create pressure, have the air of pressure from the endoporus of the sealed end of gas outlet valve lower end enter into internal taper hole in gas outlet valve promote sealing cone or ball sealer up and open the sealing channel of gas outlet valve, make the air in squish chamber enter in air through gas outlet valve; Answer magnetic piston when up, magnetic piston is answered also to make to create pull of vacuum in pumping chamber, pull of vacuum is inhaled dynamic atresia sealing plate and atresia sealing plate is separated with the sealing surface of closed hole, air enters exhaust tube and enters into closed hole through bleeder hole in vacuum tank, then the air passing hole on limited cap enters in the pumping chamber of answering below magnetic piston in negative pressure shell.

Answer magnetic piston promote spring promotion under up put in place time, the bleed-off passage entering pumping chamber is closed under the effect of the pull of vacuum of atresia sealing plate under the effect of self gravitation and in vacuum tank of installing in the sealing neck of negative pressure shell lower end, descending return under the effect of the sealing cone in gas outlet valve or the draught head of ball sealer under the effect of the gravity of self and inside and outside negative pressure shell and seal the inner conical surface of gas outlet valve, has cut off the outlet passageway in squish chamber; Now, the power-on circuit that field controller connects again electromagnetic coil generates an electromagnetic field again and to make to answer magnetic piston overpowers to promote the resistance of spring descending; The connection of circulation like this and cut off circuit, makes electromagnetic coil generate an electromagnetic field to pull to answer magnetic descent of piston and allows promoting spring and promote to answer magnetic piston stroking upward, constantly from extracting air in vacuum tank, and the air extracted is entered in air.

Safety vacuumizes a manufacture method for environment protecting pump, it is characterized in that:

During fabrication, the material of a type in protecting crust employing metal, plastics, nylon, glass fibre reinforced plastics, rubber or the composite material manufacture of several types; Hollow valve body and negative pressure shell adopt the material of a type in metal, plastics, nylon and glass fibre reinforced plastics or the composite material manufacture of several types; Seal the material of a type in cone and ball sealer employing metal, plastics, nylon and rubber or the composite material manufacture of several types; Atresia sealing plate and porose sealing plate adopt the material of a type in metal, plastics, nylon and glass fibre reinforced plastics or the composite material manufacture of several types; Magnetic piston is answered to adopt the material manufacture of the hard to bear magnetic field suction of energy.

Protecting crust creates the hollow cavity of annular, and hollow cavity has string holes, and string holes creates the hole allowing insulated electric conductor pass; Electromagnetic coil and field controller are installed in hollow cavity, or, electromagnetic coil, field controller and electronic remote controller are installed in hollow cavity; The inner of the annular housing of hollow cavity is fixed on negative pressure shell.

Conveniently assemble, during fabrication, after protecting crust is divided into two-part manufacture from annular position, recombinant together for protecting crust.

The inner chamber of negative pressure shell creates columniform cavity, and the periphery of columniform cavity creates smooth curved surface; Upper end on the center line of inner chamber manufacture have through negative pressure shell center hole, lower end manufactures has bleeder hole to pass negative pressure shell; The middle part of the lower end in negative pressure shell manufactures sealing neck protruding upward, the inside of sealing neck upper part creates closed hole, lower part creates bleeder hole, closed hole communicates with bleeder hole, closed hole and atresia sealing plate below simultaneously coordinate.

Gas outlet valve creates hollow valve body and sealing is bored or ball sealer two-part, hollow valve body creates hollow tubular, internal taper hole is manufactured on middle part or the middle and lower part of the inner chamber of hollow tubular, and the internal diameter that the internal diameter that the upper part of the internal taper hole in hollow tubular manufactures is large, lower part manufactures is little; The lower end of hollow valve body manufactures return-air sealed end, the lower end surface of return-air sealed end is manufactured on the lower end of hollow valve body, upper-end surface creates internal taper hole, the large end of internal taper hole communicates with the upper end of gas outlet valve, small end communicates with the lower end of gas outlet valve, and the inner conical surface of internal taper hole is provided with sealing cone or ball sealer.Described ball sealer creates spherosome or oval ball, and the periphery of spherosome or oval ball creates sealing surface, and sealing surface creates smooth sphere; To bore or the self gravitation of ball sealer presses down and seals inner conical surface by sealing when sealing cone or the sphere of ball sealer and inner conical surface seal; Described sealing cone creates cone or cone cylinder, and the periphery of cone or cone cylinder creates smooth male cone (strobilus masculinus); The male cone (strobilus masculinus) of sealing cone and inner conical surface press down by the self gravitation sealing conisphere and seal inner conical surface when sealing.

Described internal taper hole creates the circular hole of tapering, the face of circular hole creates inner conical surface, can inner conical surface be sealed under the effect of the gravity of sealing cone or ball sealer self, inner conical surface can be opened with sealing by suction when cone or ball sealer have above suction and bore or the passage of ball face sealing of ball sealer sealing; The air pressure sealed above cone or ball sealer is larger, and the gluing, sealing effect of sealing cone or ball sealer and inner conical surface is better; Can open when being with the air of pressure from the endoporus of hollow valve body lower end inner conical surface with sealing bore or ball sealer sealing and form passage.

For the ease of negative pressure shell processing and be convenient to accessory to load in negative pressure shell, described negative pressure shell create segmentation processing manufacture after assemblying body; The upper end of the circular cylindrical cavity part in negative pressure shell is divided into two sections of manufactures, the main body that upper part creates pump cover, lower part creates negative pressure shell of segmentation place, center hole is manufactured on pump cover, bleeder hole is manufactured on the middle part of the main body lower end of negative pressure shell, and being combined into after the main body after pump cover and negative pressure shell manufactures is a composite entity; Or, the lower end of the circular cylindrical cavity part in negative pressure shell is divided into two sections of manufactures, the main body that lower part creates pump cover, upper part creates negative pressure shell of segmentation place, bleeder hole is manufactured on the middle part of pump cover, center hole is manufactured on the middle part of the upper end of the main body of negative pressure shell, and being combined into after the main body of pump cover and negative pressure shell manufactures is a composite entity.

Answer magnetic piston to create columniform iron core, the position of the center line of columniform iron core manufactures limited location hole, point compression and vent; The upper end of columniform iron core manufactures limited location hole, and manufacturing below spacing hole has a point compression, and manufacturing below the middle part of point compression has vent; Divide the inner ring of compression to create sealing neck, the upper end portion of sealing neck creates annular sealing surface, and the upper-end surface of sealing neck creates the upper end of the periphery lower than point compression; The annular sealing surface of upper end sealing neck is not installed porose sealing plate and porose sealing plate when seal with annular sealing surface, vent communicates with answering the compression that divides of magnetic piston upper end; The periphery of columniform iron core creates smooth periphery, and smooth periphery manufactures the annular groove having depression, and annular groove is embedded with seal ring; Periphery coordinates with the inner chamber of negative pressure shell can the inner chamber of sealed negative-pressure shell, and can slide in the inner chamber of negative pressure shell.Described spacing hole creates circular hole, and the ring surface of circular hole creates inlays a point gas confinement plate stationary plane, and the annular bottom surface of circular hole creates the face that restriction point gas confinement plate inlays the degree of depth; A described point compression creates two sections, and the upper part of sealing neck creates circular hole, and the exterior portion of sealing neck creates the groove of ring, and the periphery of the periphery of circular hole and the groove of ring creates one, and circular hole communicates with vent; Described vent creates the circular hole communicated with point compression.

Described annular sealing surface creates the smooth sealing surface of ring, be manufactured on answer the upper end of the sealing neck of magnetic piston and porose sealing plate sealing surface coordinate.

Described porose sealing plate creates flat board, the part that below dull and stereotyped, the intermediate portion of one side coordinates with annular sealing surface creates sealing surface, in part beyond dull and stereotyped sealing surface coordinates with annular sealing surface, manufacture has passing hole, and passing hole is used for allowing gas pass through.

Point gas confinement plate creates the plate of air passing hole, and the anchor ring being embedded in spacing hole is adjacent to the base ring face of spacing hole; Air passing hole creates the hole allowing air pass through.

Closed hole creates circular hole, be manufactured on above the bleeder hole in the sealing neck of the lower end in negative pressure shell, the rounded face of closed hole create hold atresia sealing plate inner headed face or internal conical surface, the annular bottom surface of the circular hole of closed hole creates sealing surface.

Atresia sealing plate creates circular flat board, and below dull and stereotyped, one side creates sealing surface, and sealing surface coordinates with the closed hole in the sealing neck of negative pressure shell lower end.

Limited cap creates calotte, and the crown of calotte part manufactures the air passing hole allowing gas pass through, and the hatband partial fixing of calotte can limit the distance of moving on the atresia sealing plate installed in sealing neck on sealing neck.

Field controller creates and controls the controller that generates an electromagnetic field of electromagnetic coil, control time that electromagnetic field produces and the time that generates an electromagnetic field length and after generating an electromagnetic field at every turn to the interval time generated an electromagnetic field again for the second time.

In order to prevent robber from stealing automobile easily, not having vacuum servo when robber is driven a car and stopping stealing garage is adopt installing remote device between teacher position key operation and field controller to connect and cut off the power-on circuit generated an electromagnetic field; Described electronic remote controller creates to be connected and cuts off the circuit switch generated an electromagnetic field, and comprise the switch sections and electronic telecontrol part that switch on or off circuit, electronic telecontrol part comprises remote controller switch and electronic signal receiver; Described electronic remote controller can have in the present invention, also can not have.

Exhaust tube creates and connects the bleeder hole of negative pressure shell and the hollow tubular of vacuum tank.

Bleeder hole create in squish chamber that air enters in negative pressure shell through via hole, be manufactured on the lower part in the center portion of sealing neck; The time in of not installing atresia sealing plate in closed hole, the closed hole on the sealing neck of protecting crust lower end communicates with bleeder hole.

In protecting crust, be provided with electromagnetic coil, electromagnetic coil is fixed on the lower part outside negative pressure shell, and protecting crust is fixed on the outside protection electromagnetic coil of the bottom of negative pressure shell; Below the outside of protecting crust, one side is fixed with foot rest, and the lower end of foot rest is fixed on vacuum tank, and the lower end of foot rest is lower than the position of the bleeder hole of negative pressure shell lower end.The circuit connecting electromagnetic coil is connected with field controller, and the circuit of field controller is connected with insulated electric conductor, and insulated electric conductor is connected with teacher position key operation, and field controller is arranged in protecting crust; Or, the circuit connecting electromagnetic coil is connected with field controller, the circuit of field controller is connected with electronic remote controller, electronic remote controller is connected with insulated electric conductor, insulated electric conductor is connected with teacher position key operation, and the electronic signal receiver of field controller, electronic remote controller and electronic remote controller is arranged in protecting crust.Be provided with in negative pressure shell atresia sealing plate, porose sealing plate, limited cap, promotion spring, answer magnetic piston, point gas confinement plate, promote the lower part of spring fitting at the inner chamber of negative pressure shell, answer magnetic piston to be arranged on the upper part of the inner chamber of negative pressure shell, promote spring top and be pressed in the lower end of answering magnetic piston; Answering the spacing hole internal fixtion of the upper end portion of magnetic piston to have a point water confinement plate, answer magnetic piston can slide up and down in the inner chamber of negative pressure shell; A point gas confinement plate is had answering the spacing hole internal fixtion of magnetic piston upper end, the annular sealing surface of the sealing neck end in point compression of answering the upper part of magnetic piston is provided with porose sealing plate, porose sealing plate can move up and down between annular sealing surface and point gas confinement plate, and porose sealing plate coordinates the bleed-off passage that can seal or open the squish chamber entered in negative pressure shell with answering the annular sealing surface of magnetic piston; Be provided with atresia sealing plate in closed hole in the sealing neck of the lower end in negative pressure shell, limited cap is fixed on the outside of sealing neck by screw thread or jump ring; Atresia sealing plate coordinates with the closed hole in the sealing neck of negative pressure shell lower end and can seal or open the bleed-off passage of the pumping chamber entered in negative pressure shell; When answering magnetic piston stroking upward, the inner chamber part of answering the negative pressure shell of magnetic piston lower part is pumping chamber; When answering magnetic descent of piston, the inner chamber part of the negative pressure shell of magnetic piston upper part is answered to be squish chamber.Be fixed with exhaust tube at the bleeder hole place of the lower end of negative pressure shell, the other end of exhaust tube is connected with vacuum tank, and the endoporus of exhaust tube communicates with bleeder hole and vacuum tank; Be provided with gas outlet valve in the upper end of negative pressure shell, the lower part of gas outlet valve is fixed in the center hole of the overlying one end of negative pressure shell.

The present invention vacuumize safely environment protecting pump compact structure, vibrate little, powerful, utilization rate of electrical are high, the efficiency of extracting vacuum is high, be suitable for oil-engine driven automobile and electric vehicle is installed and used and industrial extracting vacuum use; The market prospects of industrialization are good, commercial value is high, manufacture and use all very convenient.

Accompanying drawing explanation

Fig. 1 and Fig. 2 is the structural representation that safety vacuumizes environment protecting pump;

Fig. 3 is the structural representation of answering magnetic piston;

Fig. 4 is the schematic appearance of the plan view of answering magnetic piston;

Shown in figure: negative pressure shell 1, answer magnetic piston 2, point gas confinement plate 3, passing hole 4, hollow valve body 5, sealing cone or ball sealer 6, porose sealing plate 7, promote spring 8, electromagnetic coil 9, protecting crust 10, atresia sealing plate 11, limited cap 12, foot rest 13, exhaust tube 15, bleeder hole 16, annular sealing surface 17, point compression 18, spacing hole 19, air passing hole 20, vent 21, annular bottom surface 25.

Embodiment

The present invention vacuumizes safely environment protecting pump and mainly comprises protecting crust 10, electromagnetic coil 9, negative pressure shell 1, bleeder hole 16, exhaust tube 15, atresia sealing plate 11, porose sealing plate 7, sealing cone or ball sealer 6, limited cap 12, promotes spring 8, answers magnetic piston 2, divides gas confinement plate 3, internal taper hole, vent 21, gas outlet valve, field controller; Or comprise protecting crust 10, electromagnetic coil 9, negative pressure shell 1, bleeder hole 16, exhaust tube 15, atresia sealing plate 11, porose sealing plate 7, sealing cone or ball sealer 6, limited cap 12, promote spring 8, answer magnetic piston 2, divide gas confinement plate 3, internal taper hole, vent 21, gas outlet valve, field controller, electronic remote controller.

In protecting crust 10, be provided with electromagnetic coil 9, electromagnetic coil 9 is fixed on the lower part outside negative pressure shell 1, and protecting crust 10 is fixed on the outside protection electromagnetic coil 9 of the bottom of negative pressure shell 1; Below the outside of protecting crust 10, one side is fixed with foot rest 13, and the lower end of foot rest is fixed on vacuum tank, and the lower end of foot rest 13 is lower than the position of the bleeder hole 16 of negative pressure shell 1 lower end.

Atresia sealing plate 11, limited cap 12, porose sealing plate 7 are installed in negative pressure shell 1, promote spring 8, answer magnetic piston 2, divide gas confinement plate 3, promote the lower part that spring 8 is arranged on the inner chamber of negative pressure shell 1, answer magnetic piston 2 to be arranged on the upper part of the inner chamber of negative pressure shell 1, promote spring 8 top and be pressed in the lower end of answering magnetic piston 2; Answer the spacing hole internal fixtion of the upper end portion of magnetic piston 2 to have a point water confinement plate, answer magnetic piston 2 can slide up and down in the inner chamber of negative pressure shell 1; A point gas confinement plate 3 is had answering spacing hole 19 internal fixtion of magnetic piston 2 upper end, the annular sealing surface 17 of the sealing neck end in point compression 18 of answering the upper part of magnetic piston 2 is provided with porose sealing plate 7, porose sealing plate 7 can move up and down between annular sealing surface 17 and point gas confinement plate 3, and porose sealing plate 7 can seal with answering the annular sealing surface 17 of magnetic piston 2 to coordinate or open the bleed-off passage in the squish chamber entered in negative pressure shell 1; Be provided with atresia sealing plate 11 in closed hole in the sealing neck of the lower end in negative pressure shell 1, limited cap 12 is fixed on the outside of sealing neck by screw thread or jump ring; Atresia sealing plate 11 coordinate with the closed hole in the sealing neck of negative pressure shell 1 lower end and can seal or open the pumping chamber entered in negative pressure shell 1 air inlet lead to; When answering magnetic piston 2 up, the inner chamber part of answering the negative pressure shell 1 of magnetic piston 2 lower part is pumping chamber; When answering magnetic piston 2 descending, the inner chamber part of the negative pressure shell 1 of magnetic piston 2 upper part is answered to be squish chamber.Be fixed with exhaust tube at the bleeder hole place of the lower end of negative pressure shell 1, the other end of exhaust tube is connected with vacuum tank, and the endoporus of exhaust tube communicates with bleeder hole and vacuum tank; Be provided with gas outlet valve in the upper end of negative pressure shell 1, the lower part of gas outlet valve is fixed in the center hole of the overlying one end of negative pressure shell 1.

During fabrication, protecting crust 10 adopts the material of the type in metal, plastics, nylon, glass fibre reinforced plastics, rubber or the composite material manufacture of several types; Hollow valve body 5 and negative pressure shell 1 adopt the material of the type in metal, plastics, nylon and glass fibre reinforced plastics or the composite material manufacture of several types; Sealing cone or ball sealer 6 adopt the material of the type in metal, plastics, nylon and rubber or the composite material manufacture of several types; Atresia sealing plate 11 and porose sealing plate 7 adopt the material of the type in metal, plastics, nylon and glass fibre reinforced plastics or the composite material manufacture of several types; Magnetic piston 2 is answered to adopt the material manufacture of the hard to bear magnetic field suction of energy.

Protecting crust 10 creates the hollow cavity of annular, and hollow cavity has string holes, and string holes creates the hole allowing insulated electric conductor pass; Electromagnetic coil 9 and field controller are installed in hollow cavity, or, electromagnetic coil, field controller and electronic remote controller are installed in hollow cavity; The inner of the annular housing of hollow cavity is fixed on negative pressure shell 1.

Conveniently assemble, during fabrication, after protecting crust 10 is divided into two-part manufacture from annular position, recombinant together for protecting crust 10.

The inner chamber of negative pressure shell 1 creates columniform cavity, and the periphery of columniform cavity creates smooth curved surface; Upper end on the center line of inner chamber manufacture have through negative pressure shell 1 center hole, lower end manufactures has bleeder hole 16 through negative pressure shell 1; The middle part of the lower end in negative pressure shell 1 manufactures sealing neck protruding upward, the upper part of the inside of sealing neck creates closed hole, lower part creates bleeder hole 16, closed hole communicates with bleeder hole 16, and closed hole coordinates with one side below atresia sealing plate 11.

Gas outlet valve creates hollow valve body 5 and sealing is bored or ball sealer 6 two-part, hollow valve body 5 creates hollow tubular, internal taper hole is manufactured on middle part or the middle and lower part of the inner chamber of hollow tubular, and the internal diameter that the internal diameter that the upper part of the internal taper hole in hollow tubular manufactures is large, lower part manufactures is little; The lower end of hollow valve body 5 manufactures return-air sealed end, the lower end surface of return-air sealed end is manufactured on the lower end of hollow valve body 5, upper-end surface creates internal taper hole, the large end of internal taper hole communicates with the upper end of gas outlet valve, small end communicates with the lower end of gas outlet valve, and the inner conical surface of internal taper hole is provided with sealing cone or ball sealer 6.Described ball sealer 6 creates spherosome or oval ball, and the periphery of spherosome or oval ball creates sealing surface, and sealing surface creates smooth sphere; Gravity by self when the sphere of sealing cone or ball sealer 6 and inner conical surface seal presses down and seals inner conical surface; Described sealing cone 6 creates cone or cone cylinder, and the periphery of cone or cone cylinder creates smooth male cone (strobilus masculinus); The male cone (strobilus masculinus) of sealing cone and inner conical surface press down by the self gravitation sealing conisphere and seal inner conical surface when sealing.

Described internal taper hole creates the circular hole of tapering, the face of circular hole creates inner conical surface, can inner conical surface be sealed under the effect of the gravity of sealing cone or ball sealer 6 self, inner conical surface can be opened with sealing by suction when cone or ball sealer 6 have above suction and bore or the passage of ball face sealing of ball sealer sealing; The air pressure sealed above cone or ball sealer 6 is larger, and the gluing, sealing effect of sealing cone or ball sealer 6 and inner conical surface is better; Can open when being with the air of pressure from the endoporus of hollow valve body 5 lower end inner conical surface with sealing bore or ball sealer 6 sealing and form passage.

For the ease of negative pressure shell 1 processing and be convenient to accessory to load in negative pressure shell 1, described negative pressure shell 1 create segmentation processing manufacture after assemblying body; The upper end of the circular cylindrical cavity part in negative pressure shell 1 is divided into two sections of manufactures, the main body that the upper part of segmentation place creates pump cover, lower part creates negative pressure shell 1, center hole is manufactured on pump cover, bleeder hole 16 is manufactured on the middle part of the main body lower end of negative pressure shell 1, and being combined into after the main body after pump cover and negative pressure shell 1 manufactures is a composite entity; Or, the lower end of the circular cylindrical cavity part in negative pressure shell 1 is divided into two sections of manufactures, the main body that the lower part of segmentation place creates pump cover, upper part creates negative pressure shell 1, bleeder hole 16 is manufactured on the middle part of pump cover, center hole is manufactured on the middle part of the upper end of the main body of negative pressure shell 1, and being combined into after the main body of pump cover and negative pressure shell 1 manufactures is a composite entity.

Answer magnetic piston 2 to create columniform iron core, the position of the center line of columniform iron core manufactures limited location hole 19, point compression 18 and vent 21; The upper end of columniform iron core manufactures limited location hole 19, and manufacturing below spacing hole 19 has point compression 18, and manufacturing below the middle part of point compression 18 has vent 21; Divide the inner ring of compression 18 to create sealing neck, the upper end portion of sealing neck creates annular sealing surface 17, and the upper-end surface of sealing neck creates the upper end of the periphery lower than point compression 18; The annular sealing surface 17 of upper end sealing neck is not installed porose sealing plate 7 and porose sealing plate 7 when not sealing with annular sealing surface 17, vent 21 communicates with answering the compression 18 that divides of magnetic piston 2 upper end; The periphery of columniform iron core creates smooth periphery, and smooth periphery manufactures the annular groove having depression, and annular groove is embedded with seal ring; Periphery coordinates with the inner chamber of negative pressure shell 1 can the inner chamber of sealed negative-pressure shell 1, and can slide in the inner chamber of negative pressure shell 1.Described spacing hole 19 creates circular hole, and the ring surface of circular hole creates inlays point gas confinement plate 3 stationary plane, and the annular bottom surface 25 of circular hole creates the face that restriction point gas confinement plate 3 inlays the degree of depth; A described point compression 18 creates two sections, and the upper part of sealing neck creates circular hole, and the exterior portion of sealing neck creates the groove of ring, and the periphery of the periphery of circular hole and the groove of ring creates one, and circular hole communicates with vent 21; Described vent 21 creates the circular hole communicated with point compression 18.

Described annular sealing surface 17 creates the smooth sealing surface of ring, is manufactured on and answers the upper end of the sealing neck of magnetic piston 2 to coordinate with the sealing surface of porose sealing plate 7.

Described porose sealing plate 7 creates flat board, the part that below dull and stereotyped, the intermediate portion of one side coordinates with annular sealing surface 17 creates sealing surface, in part beyond dull and stereotyped sealing surface coordinates with annular sealing surface 17, manufacture has passing hole, and passing hole is used for allowing gas pass through.

Point gas confinement plate 3 creates the plate of air passing hole 20, and the anchor ring being embedded in spacing hole 19 is adjacent to the base ring face of spacing hole 19; Air passing hole 20 creates the hole allowing air pass through.

Closed hole creates circular hole, be manufactured on above the bleeder hole 16 in the sealing neck of the lower end in negative pressure shell 1, the rounded face of closed hole creates the inner headed face or internal conical surface that hold atresia sealing plate 11, and the annular bottom surface 25 of the circular hole of closed hole creates sealing surface.

Atresia sealing plate 11 creates circular flat board, and below dull and stereotyped, one side creates sealing surface, and sealing surface coordinates with the closed hole in the sealing neck of negative pressure shell 1 lower end.

Limited cap 12 creates calotte, and the crown of calotte part manufactures the air passing hole 20 allowing gas pass through, and the hatband partial fixing of calotte can limit the distance that the atresia sealing plate 11 installed in sealing neck moves on sealing neck.

Field controller creates and controls the controller that generates an electromagnetic field of electromagnetic coil 9, control time that electromagnetic field produces and the time that generates an electromagnetic field length and after generating an electromagnetic field at every turn to the interval time generated an electromagnetic field again for the second time.

Exhaust tube 15 creates and connects the bleeder hole 16 of negative pressure shell 1 and the hollow tubular of vacuum tank.

Bleeder hole 16 create in squish chamber that air enters in negative pressure shell 1 through via hole, be manufactured on the lower part in the center portion of sealing neck; When not installing atresia sealing plate 11 in closed hole, the closed hole on the sealing neck of protecting crust 10 lower end communicates with bleeder hole 16.

Keep shape in order to ensure protecting crust 10 can protect electromagnetic coil 9 and be not easy distortion, the cavity of protecting crust 10 manufactures the skeleton having support;

Air in the squish chamber that can promote in negative pressure shell 1 to make to answer magnetic piston 2 enters gas outlet valve, adopts and promotes spring 8 as the air promoting to answer in magnetic piston 2 up compression squish chamber in air pressure air valve.

The air extracted in vacuum tank is laid in and is waited to press in pumping chamber, extrudes air and produce air pressure and discharge outside negative pressure shell in squish chamber; In squish chamber during exhaust, pumping chamber communicates with squish chamber; When discharging air in squish chamber, pumping chamber is by sealing cone or ball sealer 6 and answer the internal taper hole in magnetic piston 2 seal and disconnect the bleed-off passage entering squish chamber.

Described safety vacuumizes environment protecting pump in the process of exhaust, and controlling does not have return spring in the one-way check valve of exhaust passage and deaeration passage; When pumping chamber exhaust, answer the suction of the up generation of magnetic piston 2 to open atresia sealing plate 11 and the sealing of the closed hole in the sealing neck of the lower end in negative pressure shell 1 and open the passage of exhaust, the porose sealing plate 7 being arranged on the sealing neck upper end of answering on magnetic piston 2 automatic decline return and the passage of closing the exhaust entered in squish chamber seals under the effect of self gravitation; When squish chamber exhaust, being arranged on the sealing cone of the internal taper hole of gas outlet valve or ball sealer 6 utilizes the gravity of self to make sealing cone or ball sealer 6 decline return and the passage of closing the extrusion air on gas outlet valve seals automatically, answers magnetic piston 2 descending and makes to produce pumping chamber in the up passage then opening the exhaust entered in squish chamber of porose sealing plate 7 that pressure promotion is arranged on the sealing neck upper end of answering magnetic piston 2; When giving vent to anger in squish chamber, under the effect of outlet pressure, promote sealing cone on the internal taper hole of gas outlet valve or ball sealer 6 up and open the passage of giving vent to anger of gas outlet valve, answer magnetic piston 2 descending and make in pumping chamber, to produce the up passage then opening the exhaust entered in squish chamber of porose sealing plate 7 that pressure promotes to be arranged on the sealing neck upper end of answering magnetic piston 2.

During use, do not have electronic remote controller, teacher of the opening position key operation directly connects the power-on circuit of insulated electric conductor and field controller; Have electronic remote controller, press the starting button of remote controller switch after the key of teacher of the opening position, the circuit of electronic remote controller and field controller connected by electronic signal receiver after receiving activating signal; The power-on circuit that field controller connects electromagnetic coil 9 generates an electromagnetic field; The attraction force that electromagnetic field produces pulls the pressure of answering magnetic piston 2 to overcome promotion spring 8 to move down, when answering magnetic piston 2 to start descending, the bleed-off passage entering pumping chamber is closed under the effect of the pull of vacuum of atresia sealing plate 11 under the effect of self gravitation and in vacuum tank of installing in the sealing neck of negative pressure shell 1 lower end, descending return under the effect of the sealing cone in gas outlet valve or the draught head of ball sealer 6 under the effect of the gravity of self and inside and outside negative pressure shell and seal the inner conical surface of gas outlet valve, has cut off the outlet passageway in squish chamber; Answer magnetic piston 2 when descending, the air of answering magnetic piston 2 to promote to enter in pumping chamber and make air produce internal pressure, there is the air of pressure upwards wash the sealing of annular sealing surface 17 and porose sealing plate 7 open from the upper end of answering the vent 21 of magnetic piston 2 to enter into sealing neck and continue up after porose sealing plate 7 is shifted, enter in squish chamber after the air passing hole 20 that annular is divided on the passing hole on air drain, porose sealing plate 7 and point gas confinement plate 3.

Answer magnetic piston 2 descending move to compression promote the compression stage of spring 8 spacing time, the power-on circuit of field controller cutoff solenoid 9, electromagnetic field disappears, and answers magnetic piston 2 up under the promotion promoting spring 8; When answering magnetic piston 2 to start up, be arranged on and answer the porose sealing plate 7 of the sealing neck upper end of magnetic piston 2 descending and close the bleed-off passage that air enters squish chamber under the effect of the gravity of self; When answering magnetic piston 2 up, answer the up of magnetic piston 2 and make the air in squish chamber create pressure, have the air of pressure from the endoporus of the sealed end of gas outlet valve lower end enter into internal taper hole in gas outlet valve promote sealing cone or ball sealer 6 up and open the sealing channel of gas outlet valve, make the air in squish chamber enter in air through gas outlet valve; Answer magnetic piston 2 when up, magnetic piston 2 is answered also to make to create pull of vacuum in pumping chamber, pull of vacuum is inhaled dynamic atresia sealing plate 11 and atresia sealing plate 11 and the sealing surface of closed hole is separated, air enters exhaust tube and enters into closed hole through bleeder hole 16 in vacuum tank, then the air passing hole 20 on limited cap 12 enters in the pumping chamber of answering below magnetic piston 2 in negative pressure shell 1.

Answer magnetic piston 2 promote spring 8 promotion under up put in place time, the bleed-off passage entering pumping chamber is closed under the effect of the pull of vacuum of atresia sealing plate 11 under the effect of self gravitation and in vacuum tank of installing in the sealing neck of negative pressure shell 1 lower end, descending return under the effect of the sealing cone in gas outlet valve or the draught head of ball sealer 6 under the effect of the gravity of self and inside and outside negative pressure shell and seal the inner conical surface of gas outlet valve, has cut off the outlet passageway in squish chamber; Now, the power-on circuit that field controller connects again electromagnetic coil 9 again generates an electromagnetic field and makes to answer magnetic piston 2 descending; The connection of circulation like this and cut off circuit, makes electromagnetic coil 9 generate an electromagnetic field to pull to answer magnetic piston 2 descending and allow and promote spring 8 and promote to answer magnetic piston 2 up, constantly from extracting air in vacuum tank, and the air extracted is entered in air.

Claims

1. safety vacuumizes an environment protecting pump, it is characterized in that: described safety vacuumizes environment protecting pump and comprises protecting crust, electromagnetic coil, negative pressure shell, bleeder hole, exhaust tube, atresia sealing plate, porose sealing plate, ball sealer, limited cap, promotion spring, answers magnetic piston, point gas confinement plate, internal taper hole, vent, gas outlet valve, field controller;

In protecting crust, be provided with electromagnetic coil, electromagnetic coil is fixed on the lower part outside negative pressure shell, and protecting crust is fixed on the outside protection electromagnetic coil of the bottom of negative pressure shell; Below the outside of protecting crust, one side is fixed with foot rest, and the lower end of foot rest is fixed on vacuum tank, and the lower end of foot rest is lower than the position of the bleeder hole of negative pressure shell lower end;

The circuit connecting electromagnetic coil is connected with field controller, and the circuit of field controller is connected with insulated electric conductor, and insulated electric conductor is connected with teacher position key operation, and field controller is arranged in protecting crust;

Be provided with in negative pressure shell atresia sealing plate, limited cap, porose sealing plate, promote spring, answer magnetic piston, point gas confinement plate, promote the lower part of spring fitting at the inner chamber of negative pressure shell, answer magnetic piston to be arranged on the upper part of the inner chamber of negative pressure shell, promote spring top and be pressed in the lower end of answering magnetic piston; Answering the spacing hole internal fixtion of the upper end portion of magnetic piston to have a point water confinement plate, answer magnetic piston can slide up and down in the inner chamber of negative pressure shell; A point gas confinement plate is had answering the spacing hole internal fixtion of magnetic piston upper end, the annular sealing surface of the sealing neck end in point compression of answering the upper part of magnetic piston is provided with porose sealing plate, porose sealing plate can move up and down between annular sealing surface and point gas confinement plate, and porose sealing plate coordinates the bleed-off passage that can seal or open the squish chamber entered in negative pressure shell with answering the annular sealing surface of magnetic piston; Be provided with atresia sealing plate in closed hole in the sealing neck of the lower end in negative pressure shell, limited cap is fixed on the outside of sealing neck by screw thread or jump ring; The air inlet that atresia sealing plate can seal with the closed hole cooperation in the sealing neck of negative pressure shell lower end or open the pumping chamber entered in negative pressure shell is led to; When answering magnetic piston stroking upward, the inner chamber part of answering the negative pressure shell of magnetic piston lower part is pumping chamber; When answering magnetic descent of piston, the inner chamber part of the negative pressure shell of magnetic piston upper part is answered to be squish chamber; Be fixed with exhaust tube at the bleeder hole place of the lower end of negative pressure shell, the other end of exhaust tube is connected with vacuum tank, and the endoporus of exhaust tube communicates with bleeder hole and vacuum tank; Be provided with gas outlet valve in the upper end of negative pressure shell, the lower part of gas outlet valve is fixed in the center hole of the overlying one end of negative pressure shell;

The material of described protecting crust is the material of a type in metal, plastics, nylon, glass fibre reinforced plastics or the composite material of several types; The material of a type in material employing metal, plastics, nylon and the glass fibre reinforced plastics of hollow valve body and negative pressure shell or the composite material of several types; The material of a type in material employing metal, plastics, nylon and the rubber of ball sealer or the composite material of several types; Atresia sealing plate and porose sealing plate material adopt the material of a type in metal, plastics, nylon and glass fibre reinforced plastics or the composite material of several types; The material of magnetic piston is answered to be can the material of hard to bear magnetic field suction;

Described protecting crust is the hollow cavity of annular, hollow cavity has string holes, is provided with electromagnetic coil and field controller in hollow cavity; The inner of the annular housing of hollow cavity is fixed on negative pressure shell; String holes is the hole allowing insulated electric conductor pass;

For the ease of protecting crust processing and be convenient to accessory to load in protecting crust, described protecting crust is the assemblying body after segmentation, and after the annular position of protecting crust is divided into two parts, recombinant is together;

The inner chamber of described negative pressure shell is circular cylindrical cavity, and the cylndrical surface of columniform cavity is smooth curved surface; Upper end on the center line of inner chamber has that center hole passes negative pressure shell, lower end has bleeder hole to pass negative pressure shell; There is sealing neck protruding upward at the middle part of the lower end in negative pressure shell, the upper part of the inside of sealing neck is closed hole, lower part is bleeder hole, the time in of not installing atresia sealing plate in closed hole, closed hole communicates with bleeder hole, closed hole and atresia sealing plate below one side coordinate;

Described gas outlet valve comprises hollow valve body and ball sealer, and hollow valve body is hollow tubular, and internal taper hole is in the middle part of the inner chamber of hollow tubular or middle and lower part, and the internal diameter of the upper part of the internal taper hole in hollow tubular internal diameter that is large, lower part is little; There is return-air sealed end the lower end of hollow valve body, the lower end surface of return-air sealed end in the lower end of hollow valve body, upper-end surface is internal taper hole, the large end of internal taper hole communicates with the upper end of gas outlet valve, small end communicates with the lower end of gas outlet valve, and the inner conical surface of internal taper hole is provided with ball sealer; Described internal taper hole is the circular hole having tapering, the face of circular hole is inner conical surface, the mating spherical surfaces of inner conical surface and ball sealer, can inner conical surface be sealed under the effect of the gravity of ball sealer self, the passage of the ball face sealing of inner conical surface and ball sealer when having suction on ball sealer, can be opened by suction; Air pressure above ball sealer is larger, and the gluing, sealing effect of ball sealer and inner conical surface is better; The sealing of inner conical surface and ball sealer can be opened when being with the air of pressure from the endoporus of hollow valve body lower end and form passage;

For the ease of negative pressure shell processing and be convenient to accessory to load in negative pressure shell, described negative pressure shell is the assemblying body after segmentation; The upper end of the circular cylindrical cavity part in negative pressure shell is divided into two sections, the main body that the upper part of segmentation place is pump cover, lower part is negative pressure shell, center hole is on pump cover, and bleeder hole is at the middle part of the main body lower end of negative pressure shell, and the body combination of pump cover and negative pressure shell becomes a composite entity; Or, the lower end of the circular cylindrical cavity part in negative pressure shell is divided into two sections, the main body that the lower part of segmentation place is pump cover, upper part is negative pressure shell, bleeder hole is at the middle part of pump cover, center hole is at the middle part of the upper end of the main body of negative pressure shell, and the body combination of pump cover and negative pressure shell becomes a composite entity;

Described magnetic piston of answering is columniform iron core, the limited location hole, position of the center line of columniform iron core, point compression and vent; The limited location hole, upper end of columniform iron core is a point compression below spacing hole, is vent below the middle part of point compression; The inner ring of point compression is sealing neck, and the inside of sealing neck is one section above of vent, and the annular sealing surface of sealing neck upper end is lower than the upper end of the periphery of point compression; The annular sealing surface at top sealing neck is not installed porose sealing plate and porose sealing plate when seal with annular sealing surface, vent communicates with answering the compression that divides of magnetic piston upper end; Spacing hole is used for a fixing point of gas confinement plate, and point compression is for disperseing the air that passes through and guiding air to enter air passing hole on porose sealing plate; The periphery of columniform iron core is smooth periphery, and smooth periphery has the annular groove of depression, and annular groove is embedded with seal ring; Periphery coordinates with the inner chamber of negative pressure shell can the inner chamber of sealed negative-pressure shell, and can slide in the inner chamber of negative pressure shell; Described spacing hole is the rounded face of circular hole circular hole is inlay a point gas confinement plate stationary plane, and the annular bottom surface of circular hole is the face that restriction point gas confinement plate inlays the degree of depth; A described point compression is divided into two sections, and the upper part of sealing neck is circular hole, and the exterior portion of sealing neck is the groove of ring, and the periphery of the periphery of circular hole and the groove of ring is connected, and circular hole communicates with vent; Described vent is the hole communicated with point compression;

Described annular sealing surface is the smooth sealing surface of ring, annular sealing surface answer the upper end of the sealing neck of magnetic piston and porose sealing plate sealing surface coordinate;

Described porose sealing plate is dull and stereotyped, and the part that below dull and stereotyped, the intermediate portion of one side coordinates with annular sealing surface is sealing surface, and the part beyond dull and stereotyped sealing surface coordinates with annular sealing surface has passing hole, and passing hole is used for allowing gas pass through;

A described point of gas confinement plate is the plate having air passing hole, and the anchor ring being embedded in spacing hole is adjacent to the base ring face of spacing hole; Air passing hole is used for allowing air pass through;

Described ball sealer is spherosome or oval ball, and the periphery of spherosome or oval ball is sealing surface, and sealing surface is smooth sphere; Self gravitation by ball sealer when the sphere of ball sealer and inner conical surface seal presses down and seals inner conical surface;

Described closed hole is circular hole, above the bleeder hole in the sealing neck of the lower end in negative pressure shell, the rounded face of circular port be hold atresia sealing plate inner headed face or internal conical surface, the annular bottom surface of the circular hole of closed hole is sealing surface;

Described atresia sealing plate is circular flat board, and below dull and stereotyped, one side is sealing surface, and sealing surface coordinates with the closed hole in the sealing neck of negative pressure shell lower end;

Described limited cap is calotte, and the crown of calotte part has the air passing hole allowing gas pass through, and the hatband partial fixing of calotte can limit the distance of moving on the atresia sealing plate installed in sealing neck on sealing neck;

Described field controller controls the controller that generates an electromagnetic field of electromagnetic coil, control time and the time length generated an electromagnetic field that electromagnetic field produces and after generating an electromagnetic field at every turn to the interval time generated an electromagnetic field again for the second time;

Described exhaust tube connects the bleeder hole of negative pressure shell and the hollow tubular of vacuum tank;

Described bleeder hole be in air enters in negative pressure shell squish chamber through via hole, at the lower part in the center portion of sealing neck; The time in of not installing atresia sealing plate in closed hole, the closed hole on the sealing neck of protecting crust lower end communicates with bleeder hole;

The air extracted in vacuum tank is laid in and is waited to press in pumping chamber, extrudes air and produce air pressure and discharge outside negative pressure shell in squish chamber; In squish chamber during exhaust, pumping chamber communicates with squish chamber; When discharging air in squish chamber, pumping chamber is by ball sealer and answer the internal taper hole in magnetic piston to seal and disconnect the bleed-off passage entering squish chamber;

Described safety vacuumizes environment protecting pump in the process of exhaust, and controlling does not have return spring in the one-way check valve of exhaust passage and deaeration passage; When pumping chamber exhaust, the suction of answering magnetic piston stroking upward to produce opens exhaust opened by atresia sealing plate passage with the sealing of the closed hole in the sealing neck of the lower end in negative pressure shell, the porose sealing plate being arranged on the sealing neck upper end of answering on magnetic piston automatic decline return and the passage of closing the exhaust entered in squish chamber seals under the effect of self gravitation; When squish chamber exhaust, the ball sealer being arranged on the internal taper hole of gas outlet valve utilizes the gravity of self to make ball sealer decline return and the passage of closing the extrusion air on gas outlet valve seals automatically, answers magnetic descent of piston and makes to produce in pumping chamber the up passage then opening the exhaust entered in squish chamber of porose sealing plate that pressure promotes to be arranged on the sealing neck upper end of answering magnetic piston; When giving vent to anger in squish chamber, under the effect of outlet pressure, promote ball sealer on the internal taper hole of gas outlet valve up and open the passage of giving vent to anger of gas outlet valve, answer magnetic descent of piston and make to produce in pumping chamber the up passage then opening the exhaust entered in squish chamber of porose sealing plate that pressure promotes to be arranged on the sealing neck upper end of answering magnetic piston;

During use, the power-on circuit of insulated electric conductor and field controller connected by teacher of the opening position key operation, and the power-on circuit that field controller connects electromagnetic coil generates an electromagnetic field; The attraction force that electromagnetic field produces pulls the pressure of answering magnetic piston overpowers to promote spring to move down, when answering magnetic piston to start descending, the bleed-off passage entering pumping chamber is closed under the effect of the pull of vacuum of atresia sealing plate under the effect of self gravitation and in vacuum tank of installing in the sealing neck of negative pressure shell lower end, descending return under the effect of the draught head of the ball sealer in gas outlet valve under the effect of the gravity of self and inside and outside negative pressure shell and seal the inner conical surface of gas outlet valve, has cut off the outlet passageway in squish chamber; Answer magnetic piston when descending, the air of answering magnetic piston to promote to enter in pumping chamber and make air produce internal pressure, have the air of pressure from the upper end of answering the vent of magnetic piston to enter into sealing neck upwards wash open annular sealing surface and porose sealing plate sealing and porose sealing plate be shifted continue afterwards up, divide the passing hole on air drain, porose sealing plate through annular and enter in squish chamber after dividing the air passing hole on gas confinement plate;

Answer magnetic descent of piston move to compression promote the compression stage of spring spacing time, the power-on circuit of field controller cutoff solenoid, electromagnetic field disappears, and answers magnetic piston up under the promotion promoting spring; When answering magnetic piston to start up, be arranged on and answer the porose sealing plate of the sealing neck upper end of magnetic piston descending and close the bleed-off passage that air enters squish chamber under the effect of the gravity of self; When answering magnetic piston stroking upward, answer the up of magnetic piston and make the air in squish chamber create pressure, having the air of pressure to enter into internal taper hole in gas outlet valve from the endoporus of the sealed end of gas outlet valve lower end, to promote ball sealer up and open the sealing channel of gas outlet valve, makes the air in squish chamber enter in air through gas outlet valve; Answer magnetic piston when up, magnetic piston is answered also to make to create pull of vacuum in pumping chamber, pull of vacuum is inhaled dynamic atresia sealing plate and atresia sealing plate is separated with the sealing surface of closed hole, air enters exhaust tube and enters into closed hole through bleeder hole in vacuum tank, then the air passing hole on limited cap enters in the pumping chamber of answering below magnetic piston in negative pressure shell;

Answer magnetic piston promote spring promotion under up put in place time, the bleed-off passage entering pumping chamber is closed under the effect of the pull of vacuum of atresia sealing plate under the effect of self gravitation and in vacuum tank of installing in the sealing neck of negative pressure shell lower end, descending return under the effect of the draught head of the ball sealer in gas outlet valve under the effect of the gravity of self and inside and outside negative pressure shell and seal the inner conical surface of gas outlet valve, has cut off the outlet passageway in squish chamber; Now, the power-on circuit that field controller connects again electromagnetic coil generates an electromagnetic field again and to make to answer magnetic piston overpowers to promote the resistance of spring descending; The connection of circulation like this and cut off circuit, makes electromagnetic coil generate an electromagnetic field to pull to answer magnetic descent of piston and allows promoting spring and promote to answer magnetic piston stroking upward, constantly from extracting air in vacuum tank, and the air extracted is entered in air.

2. safety according to claim 1 vacuumizes environment protecting pump, it is characterized in that: the air in the squish chamber promoting in negative pressure shell to enable to answer magnetic piston enters gas outlet valve, adopting and promoting spring as promoting to answer magnetic piston stroking upward to compress air in squish chamber in air pressure air valve.

3. safety according to claim 1 vacuumizes environment protecting pump, it is characterized in that: keep shape in order to ensure protecting crust to protect electromagnetic coil and be not easy distortion, the cavity of protecting crust manufactures the skeleton having support.

4. safety according to claim 1 vacuumizes environment protecting pump, it is characterized in that: in order to ensure that safety vacuumizes environment protecting pump and can normally work, adopt the teacher position key operation connected with insulated electric conductor control the connection of the connecting circuit of electromagnetic coil and cut off and can normally work.

5. safety according to claim 1 vacuumizes environment protecting pump, it is characterized in that: described safety vacuumizes the compact structure of environment protecting pump, it is little to vibrate, powerful, utilization rate of electrical are high, the efficiency of extracting vacuum is high, be suitable for oil-engine driven automobile and electric vehicle is installed and used and industrial extracting vacuum use; The market prospects of industrialization are good, commercial value is high, manufacture and use all very convenient.

6. safety vacuumizes a manufacture method for environment protecting pump, it is characterized in that: during fabrication, the material of a type in protecting crust employing metal, plastics, nylon, glass fibre reinforced plastics, rubber or the composite material manufacture of several types; Hollow valve body and negative pressure shell adopt the material of a type in metal, plastics, nylon and glass fibre reinforced plastics or the composite material manufacture of several types; The material of a type in ball sealer employing metal, plastics, nylon and rubber or the composite material manufacture of several types; Atresia sealing plate and porose sealing plate adopt the material of a type in metal, plastics, nylon and glass fibre reinforced plastics or the composite material manufacture of several types; Magnetic piston is answered to adopt the material manufacture of the hard to bear magnetic field suction of energy;

Protecting crust creates the hollow cavity of annular, and hollow cavity has string holes, and string holes creates the hole allowing insulated electric conductor pass; Electromagnetic coil and field controller are installed in hollow cavity; The inner of the annular housing of hollow cavity is fixed on negative pressure shell;

Conveniently assemble, during fabrication, after protecting crust is divided into two-part manufacture from annular position, recombinant together for protecting crust;

The inner chamber of negative pressure shell creates columniform cavity, and the periphery of columniform cavity creates smooth curved surface; Upper end on the center line of inner chamber manufacture have through negative pressure shell center hole, lower end manufactures has bleeder hole to pass negative pressure shell; The middle part of the lower end in negative pressure shell manufactures sealing neck protruding upward, the inside of sealing neck upper part creates closed hole, lower part creates bleeder hole, closed hole communicates with bleeder hole, closed hole and atresia sealing plate below simultaneously coordinate;

Gas outlet valve creates hollow valve body and ball sealer two-part, hollow valve body creates hollow tubular, internal taper hole is manufactured on middle part or the middle and lower part of the inner chamber of hollow tubular, and the internal diameter that the internal diameter that the upper part of the internal taper hole in hollow tubular manufactures is large, lower part manufactures is little; The lower end of hollow valve body manufactures return-air sealed end, the lower end surface of return-air sealed end is manufactured on the lower end of hollow valve body, upper-end surface creates internal taper hole, the large end of internal taper hole communicates with the upper end of gas outlet valve, small end communicates with the lower end of gas outlet valve, and the inner conical surface of internal taper hole is provided with ball sealer; Described ball sealer creates spherosome or oval ball, and the periphery of spherosome or oval ball creates sealing surface, and sealing surface creates smooth sphere; Self gravitation by ball sealer when the sphere of ball sealer and inner conical surface seal presses down and seals inner conical surface; Described internal taper hole creates the circular hole of tapering, the face of circular hole creates inner conical surface, can inner conical surface be sealed under the effect of the gravity of ball sealer self, the passage of the ball face sealing of inner conical surface and ball sealer when having suction on ball sealer, can be opened by suction; Air pressure above ball sealer is larger, and the gluing, sealing effect of ball sealer and inner conical surface is better; The sealing of inner conical surface and ball sealer can be opened when being with the air of pressure from the endoporus of hollow valve body lower end and form passage;

For the ease of negative pressure shell processing and be convenient to accessory to load in negative pressure shell, described negative pressure shell create segmentation processing manufacture after assemblying body; The upper end of the circular cylindrical cavity part in negative pressure shell is divided into two sections of manufactures, the main body that upper part creates pump cover, lower part creates negative pressure shell of segmentation place, center hole is manufactured on pump cover, bleeder hole is manufactured on the middle part of the main body lower end of negative pressure shell, and being combined into after the main body after pump cover and negative pressure shell manufactures is a composite entity; Or, the lower end of the circular cylindrical cavity part in negative pressure shell is divided into two sections of manufactures, the main body that lower part creates pump cover, upper part creates negative pressure shell of segmentation place, bleeder hole is manufactured on the middle part of pump cover, center hole is manufactured on the middle part of the upper end of the main body of negative pressure shell, and being combined into after the main body of pump cover and negative pressure shell manufactures is a composite entity;

Answer magnetic piston to create columniform iron core, the position of the center line of columniform iron core manufactures limited location hole, point compression and vent; The upper end of columniform iron core manufactures limited location hole, and manufacturing below spacing hole has a point compression, and manufacturing below the middle part of point compression has vent; Divide the inner ring of compression to create sealing neck, the upper end portion of sealing neck creates annular sealing surface, and the upper-end surface of sealing neck creates the upper end of the periphery lower than point compression; The annular sealing surface of upper end sealing neck is not installed porose sealing plate and porose sealing plate when seal with annular sealing surface, vent communicates with answering the compression that divides of magnetic piston upper end; The periphery of columniform iron core creates smooth periphery, and smooth periphery manufactures the annular groove having depression, and annular groove is embedded with seal ring; Periphery coordinates with the inner chamber of negative pressure shell can the inner chamber of sealed negative-pressure shell, and can slide in the inner chamber of negative pressure shell; Described spacing hole creates circular hole, and the ring surface of circular hole creates inlays a point gas confinement plate stationary plane, and the annular bottom surface of circular hole creates the face that restriction point gas confinement plate inlays the degree of depth; A described point compression creates two sections, and the upper part of sealing neck creates circular hole, and the exterior portion of sealing neck creates the groove of ring, and the periphery of the periphery of circular hole and the groove of ring creates one, and circular hole communicates with vent; Described vent creates the circular hole communicated with point compression;

Described annular sealing surface creates the smooth sealing surface of ring, be manufactured on answer the upper end of the sealing neck of magnetic piston and porose sealing plate sealing surface coordinate;

Described porose sealing plate creates flat board, the part that below dull and stereotyped, the intermediate portion of one side coordinates with annular sealing surface creates sealing surface, in part beyond dull and stereotyped sealing surface coordinates with annular sealing surface, manufacture has passing hole, and passing hole is used for allowing gas pass through;

Point gas confinement plate creates the plate of air passing hole, and the anchor ring being embedded in spacing hole is adjacent to the base ring face of spacing hole; Air passing hole creates the hole allowing air pass through;

Closed hole creates circular hole, be manufactured on above the bleeder hole in the sealing neck of the lower end in negative pressure shell, the rounded face of closed hole create hold atresia sealing plate inner headed face or internal conical surface, the annular bottom surface of the circular hole of closed hole creates sealing surface;

Atresia sealing plate creates circular flat board, and below dull and stereotyped, one side creates sealing surface, and sealing surface coordinates with the closed hole in the sealing neck of negative pressure shell lower end;

Limited cap creates calotte, and the crown of calotte part manufactures the air passing hole allowing gas pass through, and the hatband partial fixing of calotte can limit the distance of moving on the atresia sealing plate installed in sealing neck on sealing neck;

Field controller creates and controls the controller that generates an electromagnetic field of electromagnetic coil, control time that electromagnetic field produces and the time that generates an electromagnetic field length and after generating an electromagnetic field at every turn to the interval time generated an electromagnetic field again for the second time;

Exhaust tube creates and connects the bleeder hole of negative pressure shell and the hollow tubular of vacuum tank;

Bleeder hole create in squish chamber that air enters in negative pressure shell through via hole, be manufactured on the lower part in the center portion of sealing neck; The time in of not installing atresia sealing plate in closed hole, the closed hole on the sealing neck of protecting crust lower end communicates with bleeder hole;

In order to ensure that safety vacuumizes environment protecting pump and can normally work, the teacher position key operation connected with insulated electric conductor is adopted to control connection and the cut-out of the connecting circuit of electromagnetic coil;

Keep shape in order to ensure protecting crust to protect electromagnetic coil and be not easy distortion, the cavity of protecting crust manufactures the skeleton having support;

Air in the squish chamber promoting in negative pressure shell to enable to answer magnetic piston enters gas outlet valve, adopts and promotes spring as promoting to answer magnetic piston stroking upward to compress air in squish chamber in air pressure air valve;

In protecting crust, be provided with electromagnetic coil, electromagnetic coil is fixed on the lower part outside negative pressure shell, and protecting crust is fixed on the outside protection electromagnetic coil of the bottom of negative pressure shell; Below the outside of protecting crust, one side is fixed with foot rest, and the lower end of foot rest is fixed on vacuum tank, and the lower end of foot rest is lower than the position of the bleeder hole of negative pressure shell lower end; The circuit connecting electromagnetic coil is connected with field controller, and the circuit of field controller is connected with insulated electric conductor, and insulated electric conductor is connected with teacher position key operation, and field controller is arranged in protecting crust; Be provided with in negative pressure shell atresia sealing plate, porose sealing plate, limited cap, promotion spring, answer magnetic piston, point gas confinement plate, promote the lower part of spring fitting at the inner chamber of negative pressure shell, answer magnetic piston to be arranged on the upper part of the inner chamber of negative pressure shell, promote spring top and be pressed in the lower end of answering magnetic piston; Answering the spacing hole internal fixtion of the upper end portion of magnetic piston to have a point water confinement plate, answer magnetic piston can slide up and down in the inner chamber of negative pressure shell; A point gas confinement plate is had answering the spacing hole internal fixtion of magnetic piston upper end, the annular sealing surface of the sealing neck end in point compression of answering the upper part of magnetic piston is provided with porose sealing plate, porose sealing plate can move up and down between annular sealing surface and point gas confinement plate, and porose sealing plate coordinates the bleed-off passage that can seal or open the squish chamber entered in negative pressure shell with answering the annular sealing surface of magnetic piston; Be provided with atresia sealing plate in closed hole in the sealing neck of the lower end in negative pressure shell, limited cap is fixed on the outside of sealing neck by screw thread or jump ring; Atresia sealing plate coordinates with the closed hole in the sealing neck of negative pressure shell lower end and can seal or open the bleed-off passage of the pumping chamber entered in negative pressure shell; When answering magnetic piston stroking upward, the inner chamber part of answering the negative pressure shell of magnetic piston lower part is pumping chamber; When answering magnetic descent of piston, the inner chamber part of the negative pressure shell of magnetic piston upper part is answered to be squish chamber; Be fixed with exhaust tube at the bleeder hole place of the lower end of negative pressure shell, the other end of exhaust tube is connected with vacuum tank, and the endoporus of exhaust tube communicates with bleeder hole and vacuum tank; Be provided with gas outlet valve in the upper end of negative pressure shell, the lower part of gas outlet valve is fixed in the center hole of the overlying one end of negative pressure shell.