CN107762671A - A kind of batch (-type) injection supply system of Vehicular liquefied natural gas - Google Patents

Abstract

The invention discloses a kind of batch (-type) of Vehicular liquefied natural gas to spray supply system, including air inlet pipe, hollow tube, multiple spray-holes are provided with hollow tube upper end, magnetic valve is correspondingly installed on spray-hole, groove is provided with hollow inside pipe wall, spray-hole face groove, multiple electrothermal tubes have been arranged side by side in groove, electric heating bottom of the tube is provided with guide pad, the guide groove being engaged with guide pad is provided with bottom portion of groove, electrothermal tube includes body, it is filled in the insulating materials of tubular body and is placed in the heating wire of tubular body, heating wire end is connected with binding post, the one end of groove away from air inlet pipe is provided with the aperture being in communication with the outside, binding post is connected through aperture with wiring plate, covered with heat-conducting plate on the open end of groove.The body bottom of electrothermal tube is provided with guide pad, and guide pad coordinates with guide groove so that the placement of body is more stable, i.e., need not increase new fixed structure just can realize the fastening of electrothermal tube, reaches the purpose of optimization spray rail internal structure.

Description

A kind of batch (-type) injection supply system of Vehicular liquefied natural gas

Technical field

The present invention relates to the batch (-type) of gas injection rail, in particular to a kind of Vehicular liquefied natural gas to spray supply system.

Background technology

Gas injection rail is necessaries on CNG- gasoline double-fuel cars, but when temperature is relatively low, low temperature makes low-voltage tube Contraction of gas in road, negative pressure is formed between combustion gas common rail and filter, open gas injection rail and be not easy, influence gas burning system Normal use；We use hydro-thermal by way of gas injection rail is heated, can normal work, but need Water route is installed, increase pipeline interference, fluid leakage easily occurs, increases maintenance difficulties.

The content of the invention

It is an object of the invention to provide a kind of batch (-type) of Vehicular liquefied natural gas to spray supply system, ensures combustion gas Normal through, while avoid occurring liquid in fuel gas pipeline.

The purpose of the present invention is achieved through the following technical solutions：

A kind of batch (-type) injection supply system of Vehicular liquefied natural gas, including air inlet pipe and hollow tube in communication, Hollow tube upper end is provided with multiple spray-holes, and is correspondingly provided with magnetic valve on the spray-hole, is opened in the hollow inside pipe wall It is fluted, and groove described in the spray-hole face, multiple electrothermal tubes, electric heating bottom of the tube peace have been arranged side by side in the groove Equipped with guide pad, and the guide groove being engaged with guide pad is provided with bottom portion of groove, the electrothermal tube includes body, is filled in pipe The insulating materials in internal portion and the heating wire for being placed in tubular body, the heating wire end are connected with binding post, and groove is remote One end of air inlet pipe is provided with the aperture being in communication with the outside, and binding post is connected through aperture with wiring plate, and in the opening of groove The inside grooves are separated with hollow tube covered with heat-conducting plate, heat-conducting plate on end；Also include being placed in hollow inside pipe wall On overheat protector, the overheat protector include housing, support and installed in enclosure interior and cooperate stationary contact Piece, movable contact spring, the static contact are connected with external power source by wire, are fixed with from top to bottom fold successively on the bracket The first thermal sensitive piece, the second thermal sensitive piece put, and the end of movable contact spring and movable contact spring connects；The magnetic valve includes setting on inwall There is the solenoid valve seat of magnet coil, be disposed with moving valve, housing from inside to outside in the solenoid valve seat, on the housing End stretches out, and the housing lower end is provided with the connector of inner hollow, between connector upper end and moving valve lower end Gap is left, valve nozzle is threaded with the elongated end of housing, the gas with being connected in the middle part of connector is provided with inside the moving valve Road, spring are arranged in air flue, and two through holes connected with air flue are provided with the moving valve side wall, moving valve upper end with Connect inside valve nozzle, and multiple fumaroles are provided with the circumference on valve nozzle top, in addition to axis overlaps with the axis of valve nozzle Straight tube, the straight tube are made up of body and connecting tube, and the bottom of the pipe is connected with the open end at the top of moving valve, and even The top that valve nozzle is run through in upper end is taken over, connecting tube lower end is through the end face of body and extends downwardly, in connecting tube bottom outer rim Be provided with it is outstanding annular seal space is formed between inboard wall of tube body, and the fluid of 1/2 volume is marked with annular seal space.

During present invention work, combustion gas is injected directly in hollow tube by air inlet pipe, and is flowed into by spray-hole in magnetic valve Afterwards, by magnetic valve accurate adjustment so that ensure that combustion gas is maintained at optimal flow and exported；And in the prior art Sprayed caused by air pressure in low pressure line is relatively low and occur the situation of negative pressure between rail and filter, the present invention is in hollow tube face Groove is provided with the inwall of spray-hole, i.e., the gas circulation region in hollow tube is subjected to heat temperature raising, utilizes the hair of electrothermal tube The heat transfer of heat and heat-conducting plate so that environment temperature of the combustion gas before hollow tube is entered in hollow tube is relative to the external world Temperature drift, i.e., the pressure rise in hollow tube, is heated up, has to a certain extent after combustion gas into combustion gas after hollow tube Effect avoids and produces negative pressure between spray rail and filter and influence the flow velocity of combustion gas, ensures the normal circulation of combustion gas.Also, use Electric heating is compared with hydro-thermal mode, and while with liquid leakage risk, the efficiency of heating greatly improves, and multiple electricity Heating tube is placed in groove, and the side of groove is sealed by wiring plate, can reduce heat loss, be also convenient for simultaneously Electrothermal tube is picked and placeed, i.e., user can determine the number of electrothermal tube in real time according to the size of fuel gas supply amount, ensure with minimum Heating cost complete stable operation to combustion gas output flow；The body bottom of electrothermal tube is provided with guide pad simultaneously, is oriented to Block coordinates with guide groove so that the placement of body is more stable, i.e., need not increase new fixed structure just can realize electric heating The fastening of pipe, reach the purpose of optimization spray rail internal structure.

Wherein, overheat protector is installed in hollow tube, i.e., when the environment temperature in hollow tube is too high, overtemperature protection Device can be interrupted directly to the output of the electricity of heating wire, prevent heating wire overload or excessively stream and damage, specific control mode As follows, the main part of housing is placed in hollow inside pipe wall, the environment temperature in hollow tube is carried out by the partial shell real-time Detection, when temperature is too high, the first thermal sensitive piece is from the second thermal sensitive piece because of its different coefficient of expansion so that the first thermal sensitive piece and the Different bendings occurs respectively for two thermal sensitive pieces, that is, make it that the movable contact spring positioned at the first thermal sensitive piece end separates with static contact, Heating wire disconnects with external power source；When temperature is returned to normal level, the first thermal sensitive piece returns again with the second thermal sensitive piece Its multiple state so that movable contact spring contacts again with static contact, and then ensures that heating wire works on, in this way, greatly reducing electricity The probability that heated filament and electrothermal tube are damaged.And in the prior art, the supply of combustion gas is directly transmitted often through fuel gas pipeline, The requirement of precise fine-adjustment is not reached in terms of the adjustment of air demand so that gas supply can not meet actual demand；Present invention work When, for supplying normal discharge, moving valve contacts with each other with the corresponding end face of connector, and through hole is blocked up by inner walls completely Plug, combustion gas are flowed into straight tube by the open end at the top of air flue, finally passed through by being entered inside connector in air flue Flow out straight tube upper end；And when needing to increase gas supply amount, by magnet coil by around moving valve in solenoid valve seat Magnetic field changes so that departs between moving valve and connector, i.e., moving valve moves up, and now, what is connected with air flue is logical Hole can pass through the open end at the top of through hole and moving valve gradually with being connected inside valve nozzle by the combustion gas of output inside connector Into in valve nozzle, the combustion gas input quantity that need to only increase at connector can then increase the final combustion gas output quantity of valve nozzle, with existing skill Art is compared, and on the premise of equally increase combustion gas input quantity, the output quantity of single gas distribution channel is well below double gas distribution channels Output quantity, and then the rate of change of fuel gas supply amount in spray rail is realized, reach the purpose of gas flow flexible modulation.Also, Multiple fumaroles are set on the excircle at the top of valve nozzle, and combustion gas when being suitable for gas quantity increase in air flue or reducing is stablized defeated Go out, wherein valve nozzle is threadedly coupled with the elongated end of housing, can carry out quick-replaceable to it when valve nozzle is damaged, and then avoid to valve The integral replacing of the part such as core and solenoid valve seat, reduce use cost.Also, the axis of straight tube and the axis weight of valve nozzle Close, while improving the stability sprayed outside combustion gas, ensure the flow ejection efficiency at valve nozzle；And straight tube is by body and connecting tube Form, connecting tube is fixed during supply, and body is when servo-actuated valve body moves together, using the fluid in annular seal space by body with being connected Coupling part between pipe is fully sealed, to reach the purpose for preventing gas from leaking.

It is parallel with one another between multiple electrothermal tubes.During the lasting use of electrothermal tube, the loss of electrothermal tube is relative It is larger, i.e., the failures such as damage or short circuit occur in multiple electrothermal tubes, and multiple electrothermal tubes are arranged to parallel connection by the present invention, i.e., When single electrothermal tube breaks down, do not interfere with the normal use of remaining electrothermal tube, with prevent from spraying at low ambient temperatures rail with Negative pressure is formed between filter and causes the output flow deficiency of combustion gas.

Aluminium bar is also equipped with the tubular body, the heating wire winding is on the aluminium bar.Overloaded when heating wire Or during excessively stream, easily cause power of heating wire to decline or directly produce fusing, and the aluminium bar of installation is by heating wire in body Wound, can ensure that heating wire works within the regular hour, avoid spraying form negative pressure between rail and filter again and The output flow deficiency of combustion gas.

Cushion pad is installed in the gap.To reduce the impact between moving valve and connector end, in gap location Cushion pad is installed, on the one hand can ensure that moving valve keeps moving back and forth on stable vertical direction, on the other hand will can also subtract The abrasion of small moving valve end face, extend the service life of moving valve.

O-ring is installed in the junction of the valve nozzle outer wall and housing elongated end inwall.Because valve nozzle and housing extend Hold as threaded connection, further to strengthen the connection sealing between valve nozzle and housing, set O-ring to realize that enhancing is close The purpose of sealing property, moreover it is possible to combustion gas is buffered when spraying to the impact dynamics between housing and valve nozzle junction, to ensure to fill Put overall stability.

The present invention compared with prior art, has the following advantages and advantages：

1st, the present invention uses Electric heating compared with hydro-thermal mode, while with liquid leakage risk, the efficiency of heating Greatly improve, and multiple electric heating tubes are placed in the groove of arc, and the side of groove is sealed by wiring plate, can Reduce heat loss, while be also convenient for picking and placeing electrothermal tube, i.e., user can determine in real time according to the size of fuel gas supply amount The number of electrothermal tube, ensure to complete the stable operation to combustion gas output flow with the heating cost of minimum；

2nd, the present invention uses Electric heating compared with hydro-thermal mode, while with liquid leakage risk, the efficiency of heating Greatly improve, and multiple electric heating tubes are placed in the groove of arc, and the side of groove is sealed by wiring plate, can Reduce heat loss, while be also convenient for picking and placeing electrothermal tube, i.e., user can determine in real time according to the size of fuel gas supply amount The number of electrothermal tube, ensure to complete the stable operation to combustion gas output flow with the heating cost of minimum；

3rd, the present invention easily causes power of heating wire to decline or directly produce fusing when when heating wire overload or excessively stream, It and the aluminium bar of installation is wound by heating wire in body, can ensure that heating wire works within the regular hour, avoid spraying rail Form the output flow deficiency of negative pressure and combustion gas again between filter.

Brief description of the drawings

Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：

Fig. 1 is schematic structural view of the invention；

Fig. 2 is the structural representation of electrothermal tube；

Fig. 3 is the structural representation of overheat protector；

Fig. 4 is the structural representation of magnetic valve；

Fig. 5 is the enlarged drawing at A in Fig. 4；

Mark and corresponding parts title in accompanying drawing：

1- air inlet pipe, 2- hollow tubes, 3- spray-holes, 4- grooves, 5- heat-conducting plates, 6- magnetic valves, 7- electrothermal tubes, 8- wiring plate, 9- overheat protectors, 10- bodys, 11- insulating materials, 12- heating wire, 13- guide pads, 14- aluminium bars, 15- binding posts, 16- are led Line, 17- housings, 18- electro-insulating rubbers, 19- static contacts, 20- movable contact springs, the thermal sensitive pieces of 21- first, the thermal sensitive pieces of 22- second, 23- branch Frame, 24- through holes, 25- fumaroles, 26- straight tubes, 261- fluid, 262- annular seal spaces, 263- connecting tubes, 27- springs, 28- move valve Body, 29- housings, 30- air flues, 31- connectors, 32- solenoid valve seats, 33- cushion pads, 34-O types circle, 35- valve nozzles.

Embodiment

For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make For limitation of the invention.

Embodiment 1

As shown in Fig. 1 ~ Fig. 5, the present embodiment includes air inlet pipe 1 and hollow tube 2 in communication, is provided with the upper end of hollow tube 2 Multiple spray-holes 3, and magnetic valve 6 is correspondingly installed on the spray-hole 3, it is excellent to be provided with section in the inwall of hollow tube 2 The groove 4 of arc, and groove 4 described in the face of the spray-hole 3, have been arranged side by side multiple electrothermal tubes 7, electric heating in the groove 4 The bottom of pipe 7 is provided with guide pad 13, and the guide groove being engaged with guide pad 13 is provided with the bottom of groove 4, and the electrothermal tube 7 wraps Include body 10, the insulating materials being filled in inside body 10 11 and the heating wire 12 being placed in inside body 10, the heating wire 12 ends are connected with binding post 9, and the one end of groove 4 away from air inlet pipe 1 is provided with the aperture being in communication with the outside, and binding post 9 is through small Hole is connected with wiring plate 8, and covered with heat-conducting plate 5 on the open end of groove 4, heat-conducting plate 5 is by the inside of groove 4 with Separated inside blank pipe 2；Also include the overheat protector 9 being placed on the inwall of hollow tube 2, the overheat protector 9 includes housing 17th, support 23 and installed in the inside of housing 17 and the static contact 19, the movable contact spring 20 that cooperate, the static contact 19 is by leading Line 16 is connected with external power source, and the first thermal sensitive piece 21, second being from top to bottom sequentially stacked is fixed with the support 23 Thermal sensitive piece 22, and movable contact spring 20 is connected with the end of movable contact spring 20；The magnetic valve 6 includes being provided with magnet coil on inwall Solenoid valve seat 32, it is disposed with moving valve 28, housing 29, the upper end of housing 29 from inside to outside in the solenoid valve seat 32 Stretch out, and the connector 31 of inner hollow is provided with the lower end of housing 29, under the upper end of connector 31 and moving valve 28 Gap is left between end, valve nozzle 35 is threaded with the elongated end of housing 29, is provided with inside the moving valve 28 and connector The air flue 30 of 31 middle part connections, spring 27 is arranged in air flue 30, and is provided with two and air flue in the side wall of moving valve 28 The through hole 24 of 30 connections, the upper end of moving valve 28 is connected with the inside of valve nozzle 35, and multiple sprays are provided with the circumference on the top of valve nozzle 35 Stomata 25, in addition to the straight tube 26 that axis overlaps with the axis of valve nozzle 35, the straight tube 26 is by body and the structure of connecting tube 263 Into the bottom of the pipe is connected with the open end at the top of moving valve 28, and the top of valve nozzle 35 is run through in the upper end of connecting tube 263, even The lower end of adapter 263 is through the end face of body and extends downwardly, and the bottom outer rim of connecting tube 263 is provided with outstanding and body Annular seal space 262 is formed between inwall, and the fluid 261 of 1/2 volume is marked with annular seal space 262.

During work, combustion gas is injected directly in hollow tube 2 by air inlet pipe 1, and by spray-hole 3 flow into magnetic valve 6 in after, By magnetic valve 6 accurate adjustment so that ensure that combustion gas is maintained at optimal flow and exported；And for low in the prior art Sprayed caused by air pressure in pressure pipe road is relatively low and occur the situation of negative pressure between rail and filter, the present embodiment in hollow tube 2 just To being provided with groove 4 at the inwall of spray-hole 3, i.e., the gas circulation region in hollow tube 2 is subjected to heating heating, utilizes electrothermal tube 7 caloric value and the heat transfer of heat-conducting plate 5 so that environment temperature of the combustion gas before hollow tube 2 is entered in hollow tube 2 is relative In the external world temperature drift, i.e., in hollow tube 2 pressure rise, after combustion gas enter hollow tube 2 after combustion gas to a certain extent by Heat temperature raising, it effectively prevent and produce negative pressure between spray rail and filter and influence the flow velocity of combustion gas, ensure the normal stream of combustion gas It is logical.In process is supplied, for supplying normal discharge, moving valve 28 contacts with each other with the corresponding end face of connector 31, and through hole 24 are blocked by the inwall of housing 29 completely, and combustion gas passes through the top of air flue 30 by being entered inside connector 31 in air flue 30 Open end is flowed into valve nozzle 35, is finally flowed out by the fumarole 25 on the top of valve nozzle 35；And working as needs to increase gas supply amount When, the magnetic field around moving valve 28 is changed by magnet coil in solenoid valve seat 32 so that moving valve 28 and connector 31 it Between depart from, i.e., moving valve 28 moves up, and now, the through hole 24 connected with air flue 30 gradually connects with the inside of valve nozzle 35, It can be entered by the combustion gas of the inside of connector 31 output by the open end of through hole 24 and the top of moving valve 28 in valve nozzle 35, only The combustion gas input quantity at connector 31, which need to be increased, can then increase the final combustion gas output quantity of valve nozzle 35, compared with prior art, On the premise of same increase combustion gas input quantity, the output quantity of single gas distribution channel is entered well below the output quantity of double gas distribution channels And the rate of change of fuel gas supply amount in spray rail is realized, reach the purpose of gas flow flexible modulation.Also, at the top of valve nozzle 35 Excircle on multiple fumaroles 25 are set, combustion gas when being suitable for the increase of gas quantity in air flue 30 or reducing is stable to be exported, Wherein valve nozzle 35 is threadedly coupled with the elongated end of housing 29, can carry out quick-replaceable to it when valve nozzle 35 is damaged, and then avoid To valve element and the integral replacing of the grade part of solenoid valve seat 32, use cost is reduced.The axis of straight tube 26 and the axle of valve nozzle 35 Line overlaps, and while improving the stability sprayed outside combustion gas, ensures the flow ejection efficiency at valve nozzle 35；And straight tube 26 is by body Formed with connecting tube 263, connecting tube 263 is fixed during supply, and body utilizes annular seal space 262 when servo-actuated valve body 28 moves together In fluid 261 coupling part between body and connecting tube 263 is fully sealed, to reach the mesh for preventing combustion gas from leaking 's.

Also, using Electric heating compared with hydro-thermal mode, while with liquid leakage risk, the efficiency of heating Greatly improve, and multiple electric heating tubes are placed in the groove 4 of arc, the side of groove 4 are carried out by wiring plate 8 close Envelope, can reduce heat loss, while be also convenient for picking and placeing to electrothermal tube 7, i.e., user can be according to the size reality of fuel gas supply amount When determine the number of electrothermal tube 7, ensure to complete the stable operation to combustion gas output flow with the heating cost of minimum.In hollow tube Overheat protector 9 is installed, i.e., when the environment temperature in hollow tube 2 is too high, overheat protector 9 can be directly to heating wire in 2 12 electricity output interrupted, prevent heating wire 12 overload or excessively stream and damage, specific control mode is as follows, housing 17 Main part is placed in the inwall of hollow tube 2, the environment temperature in hollow tube 2 is detected in real time by the partial shell 17, together When wire 16 and static contact 19 junction sealed by electro-insulating rubber 18, when temperature is too high, the first thermal sensitive piece 21 and second Thermal sensitive piece 22 is because of its different coefficient of expansion so that and from the second thermal sensitive piece 22 different bendings occur respectively for the first thermal sensitive piece 21, I.e. so that the movable contact spring 20 positioned at the end of the first thermal sensitive piece 21 separates with static contact 19, heating wire 12 disconnects with external power source Connection；When temperature is returned to normal level, the first thermal sensitive piece 21 and the second thermal sensitive piece 22 reply its state again so that dynamic to touch Piece 20 contacts again with static contact 19, and then ensures that heating wire 12 works on, in this way, greatly reducing heating wire 12 and electricity The impaired probability of heat pipe.

Wherein, during the lasting use of electrothermal tube 7, the loss of electrothermal tube 7 is relatively large, i.e., in multiple electrothermal tubes 7 The failures such as damage or short circuit occur, and multiple electrothermal tubes 7 are arranged to parallel connection by the present embodiment, i.e., go out in single electrothermal tube 7 During existing failure, the normal use of remaining electrothermal tube 7 is not interfered with, is formed with preventing from spraying at low ambient temperatures between rail and filter Negative pressure and cause combustion gas output flow deficiency；The bottom of body 10 of electrothermal tube 7 is provided with guide pad 13 simultaneously, guide pad 13 with Guide groove coordinates so that the placement of body 10 is more stable, i.e., need not increase new fixed structure just can realize electrothermal tube 7 Fastening, reach optimization spray rail internal structure purpose.

The present embodiment installs cushion pad 33 to reduce the impact between moving valve 28 and the end of connector 31, in gap location, On the one hand it can ensure that moving valve 28 keeps moving back and forth on stable vertical direction, on the other hand can also will reduce moving valve 28 The abrasion of end face, extend the service life of moving valve 28.It is further due to valve nozzle 35 with the elongated end of housing 29 to be threadedly coupled Strengthen the connection sealing between valve nozzle 35 and housing 29, set O-ring 34 to realize the purpose of enhancing sealing property, also Combustion gas can be buffered when spraying to the impact dynamics between housing 29 and the junction of valve nozzle 35, to ensure the overall stabilization of device Performance.

Preferably, being also equipped with aluminium bar 14 inside the body 10, the heating wire 12 is wrapped in the aluminium bar 14 On.Overloading or during excessively stream when heating wire 12, easily causing the power drop of heating wire 12 or directly produce fusing, and body The aluminium bar 14 of installation is wound by heating wire 12 in 10, can be ensured that heating wire 12 works within the regular hour, be avoided spraying The output flow deficiency of negative pressure and combustion gas is formed between rail and filter again.

Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include Within protection scope of the present invention.

Claims (5)

1. a kind of batch (-type) injection supply system of Vehicular liquefied natural gas, including air inlet pipe（1）It is and in communication hollow Pipe（2）, in hollow tube（2）Upper end is provided with multiple spray-holes（3）, and in the spray-hole（3）Upper correspondence is provided with magnetic valve （6）, it is characterised in that：In the hollow tube（2）Inwall is provided with groove（4）, and the spray-hole（3）Groove described in face（4）, In the groove（4）Multiple electrothermal tubes have inside been arranged side by side（7）, electrothermal tube（7）Bottom is provided with guide pad（13）, and in groove （4）Bottom is provided with and guide pad（13）The guide groove being engaged, the electrothermal tube（7）Including body（10）, be filled in body （10）Internal insulating materials（11）And it is placed in body（10）Internal heating wire（12）, the heating wire（12）End connects There is binding post（9）, groove（4）Away from air inlet pipe（1）One end be provided with the aperture being in communication with the outside, binding post（9）Through aperture With wiring plate（8）Connection, and in groove（4）Open end on covered with heat-conducting plate（5）, heat-conducting plate（5）By the groove（4） Internal and hollow tube（2）Inside separates；Also include being placed in hollow tube（2）Overheat protector on inwall（9）, the overheat guarantor Protect device（9）Including housing（17）, support（23）And installed in housing（17）Static contact that is internal and cooperating（19）, dynamic touch Piece（20）, the static contact（19）Pass through wire（16）It is connected with external power source, in the support（23）On be fixed with by upper The first thermal sensitive piece being sequentially stacked under（21）, the second thermal sensitive piece（22）, and movable contact spring（20）With movable contact spring（20）End connect Connect；The magnetic valve（6）Solenoid valve seat including being provided with magnet coil on inwall（32）, in the solenoid valve seat（32）It is interior by Moving valve is disposed with from inside to outside（28）, housing（29）, the housing（29）Upper end stretches out, and in the housing（29） Lower end is provided with the connector of inner hollow（31）, connector（31）Upper end and moving valve（28）Gap is left between lower end, Housing（29）Elongated end be threaded with valve nozzle（35）, the moving valve（28）Inside is provided with and connector（31）Middle part connects Air flue（30）, spring（27）It is arranged in air flue, and in the moving valve（28）Two and air flue are provided with side wall（30）Even Logical through hole（24）, moving valve（28）Upper end and valve nozzle（35）Inside connection, and in valve nozzle（35）It is provided with the circumference on top more Individual fumarole（25）, in addition to axis and valve nozzle（35）Axis overlap straight tube（26）, the straight tube（26）By body With connecting tube（263）Form, the bottom of the pipe and moving valve（28）The open end connection at top, and connecting tube（263）Upper end Through valve nozzle（25）Top, connecting tube（263）Lower end is through the end face of body and extends downwardly, in connecting tube（263）Lower end Portion's outer rim is provided with outstanding forms annular seal space between inboard wall of tube body（262）, and in annular seal space（262）Inside it is marked with 1/2 body Long-pending fluid（261）.

A kind of 2. batch (-type) injection supply system of Vehicular liquefied natural gas according to claim 1, it is characterised in that：It is more The individual electrothermal tube（7）Between it is parallel with one another.

A kind of 3. batch (-type) injection supply system of Vehicular liquefied natural gas according to claim 1, it is characterised in that： The body（10）Inside is also equipped with aluminium bar（14）, the heating wire（12）It is wrapped in the aluminium bar（14）On.

A kind of 4. batch (-type) injection supply system of Vehicular liquefied natural gas according to claim 1, it is characterised in that： Cushion pad is installed in the gap（33）.

A kind of 5. batch (-type) injection supply system of Vehicular liquefied natural gas according to claim 1, it is characterised in that： The valve nozzle（35）Outer wall and housing（29）The junction of elongated end inwall is provided with O-ring（34）.