CN107762679A

CN107762679A - A kind of liquefied gas branch spraying system for automobile

Info

Publication number: CN107762679A
Application number: CN201610684551.3A
Authority: CN
Inventors: 邱晓霞
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-08-18
Filing date: 2016-08-18
Publication date: 2018-03-06

Abstract

The invention discloses a kind of liquefied gas branch spraying system for automobile, 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 liquefied gas branch spraying system for automobile

Technical field

The present invention relates to gas injection rail, in particular to a kind of liquefied gas branch spraying system for automobile.

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 liquefied gas branch spraying system for automobile, ensure the positive normal open of combustion gas Cross, while avoid occurring liquid in fuel gas pipeline.

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

A kind of liquefied gas branch spraying system for automobile, including air inlet pipe and hollow tube in communication, in hollow tube Upper end is provided with multiple spray-holes, and is correspondingly provided with magnetic valve on the spray-hole, and groove is provided with the hollow inside pipe wall, And groove described in the spray-hole face, multiple electrothermal tubes are arranged side by side in the groove, electric heating bottom of the tube, which is provided with, to be led To block, and the guide groove being engaged with guide pad is provided with bottom portion of groove, the electrothermal tube includes body, is filled in tubular body Insulating materials and be placed in the heating wire of tubular body, the heating wire end is connected with binding post, and groove is away from air inlet pipe One end be provided with the aperture being in communication with the outside, binding post is connected through aperture with wiring plate, and in the open end overlying of groove Heat-conducting plate is stamped, heat-conducting plate separates the inside grooves with hollow tube, and the magnetic valve includes being provided with inwall The solenoid valve seat of magnet coil, it is disposed with moving valve, housing, the housing upper end from inside to outside in the solenoid valve seat Stretch out, and the housing lower end is provided with the connector of inner hollow, stayed between connector upper end and moving valve lower end There is gap, valve nozzle be threaded with the elongated end of housing, the air flue with being connected in the middle part of connector is provided with inside the moving valve, Spring is arranged in air flue, and two through holes connected with air flue, moving valve upper end and valve are provided with the moving valve side wall Connected inside mouth, and multiple fumaroles are provided with the circumference on valve nozzle top.

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, in the prior art, the supply of combustion gas is directly transmitted often through fuel gas pipeline, in terms of the adjustment of air demand The requirement of precise fine-adjustment is not reached so that gas supply can not meet actual demand；During present invention work, for supplying normal stream Amount, moving valve contacts with each other with the corresponding end face of connector, and through hole is blocked by inner walls completely, and combustion gas passes through connector Inside is entered in air flue, is flowed into by the open end at the top of air flue in valve nozzle, finally by the fumarole stream on valve nozzle top Go out；And the magnetic field around moving valve is changed by magnet coil when needing to increase gas supply amount, in solenoid valve seat so that Depart between moving valve and connector, i.e., moving valve moves up, now, the through hole connected with air flue gradually with valve nozzle Portion connects, i.e., can be entered by the combustion gas of output inside connector by the open end at the top of through hole and moving valve in valve nozzle, only The combustion gas input quantity at connector, which need to be increased, can then increase the final combustion gas output quantity of valve nozzle, compared with prior art, same On the premise of increasing combustion gas input quantity, the output quantity of single gas distribution channel is well below the output quantity of double gas distribution channels, Jin Ershi The rate of change of fuel gas supply amount in rail is now sprayed, reaches the purpose of gas flow flexible modulation.It is also, cylindrical at the top of valve nozzle Multiple fumaroles are set on week, combustion gas when being suitable for the increase of gas quantity in air flue or reducing is stable to be exported, wherein valve nozzle with The elongated end threaded connection of housing, can carry out quick-replaceable, and then avoid to valve element and magnetic valve when valve nozzle is damaged to it The integral replacing of the parts such as seat, reduce use cost.

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.

Also include straight tube, the straight tube lower end is connected with the open end at the top of moving valve, the straight tube and valve nozzle Axis overlap.The setting of straight tube shortens operation distance of the combustion gas inside valve nozzle, avoids when increasing gas supply amount, By forming wadding stream between the combustion gas ejected in through hole and the combustion gas flowed out in moving valve open-top end, cause combustion gas in valve nozzle The internal residence time reduces the combustion gas output quantity at fumarole simultaneously；And the axis of straight tube overlaps with the axis of valve nozzle, The combustion gas that the combustion gas flowed out in through hole is flowed out with straight tube can be distinguished, but finally converged at fumarole, ensure valve nozzle The flow ejection efficiency at place.

The inwall on the valve nozzle top protrudes down along direct-injection tube axis direction, and the section of the protuberance is semicircle. Preferably, if the combustion gas of direct-injection pipe end output is applied directly on the inwall on valve nozzle top, launched by plane, combustion gas The inwall being possible to from valve nozzle top is launched in the side wall to valve nozzle, and then is extended combustion gas and persisted the time in valve nozzle, And the inwall on valve nozzle top protrudes down along direct-injection tube axis direction in the present invention, section is that semicircular protuberance can be to combustion gas Guide effect to a certain extent is carried out, that is, reduces the ejection of combustion gas, guiding gas is directly flow at fumarole along its arc surface, Further improve the gas flow ejection efficiency at valve nozzle.

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 magnetic valve；

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- binding posts, 10- bodys, 11- insulating materials, 12- heating wire, 13- guide pads, 14- aluminium bars, 15- through holes, 16- fumaroles, 17- straight tubes, 18- springs, 19- moving valves, 20- housings, 21- air flues, 22- connectors, 23- solenoid valve seats, 24- cushion pads, 25-O types circle, 26- 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. 3, 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；The magnetic valve 6 includes the solenoid valve seat 23 that magnet coil is provided with inwall, in the magnetic valve Moving valve 19, housing 20 are disposed with from inside to outside in seat 23, the upper end of housing 20 stretches out, and in the housing 20 Lower end is provided with the connector 22 of inner hollow, gap is left between the upper end of connector 22 and the lower end of moving valve 19, in housing 20 Elongated end be threaded with valve nozzle 26, the air flue 21 connected with the middle part of connector 22, spring are provided with inside the moving valve 19 18 are arranged in air flue 21, and two through holes 15 connected with air flue 21, moving valve 19 are provided with the side wall of moving valve 19 Upper end is connected with the inside of valve nozzle 26, and multiple fumaroles 16 are provided with the circumference on the top of valve nozzle 26.

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 19 contacts with each other with the corresponding end face of connector 22, and through hole 15 are blocked by the inwall of housing 20 completely, and combustion gas passes through the top of air flue 21 by being entered inside connector 22 in air flue 21 Open end is flowed into valve nozzle 26, is finally flowed out by the fumarole 16 on the top of valve nozzle 26；And working as needs to increase gas supply amount When, the magnetic field around moving valve 19 is changed by magnet coil in solenoid valve seat 23 so that moving valve 19 and connector 22 it Between depart from, i.e., moving valve 19 moves up, and now, the through hole 15 connected with air flue 21 gradually connects with the inside of valve nozzle 26, It can be entered by the combustion gas of the inside of connector 22 output by the open end of through hole 15 and the top of moving valve 19 in valve nozzle 26, only The combustion gas input quantity at connector 22, which need to be increased, can then increase the final combustion gas output quantity of valve nozzle 26, 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 26 Excircle on multiple fumaroles 16 are set, combustion gas when being suitable for the increase of gas quantity in air flue 21 or reducing is stable to be exported, Wherein valve nozzle 26 is threadedly coupled with the elongated end of housing 20, can carry out quick-replaceable to it when valve nozzle 26 is damaged, and then avoid To valve element and the integral replacing of the grade part of solenoid valve seat 23, use cost is reduced.

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.

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 24 to reduce the impact between moving valve 19 and the end of connector 22, in gap location, On the one hand it can ensure that moving valve 19 keeps moving back and forth on stable vertical direction, on the other hand can also will reduce moving valve 19 The abrasion of end face, extend the service life of moving valve 19.It is further due to valve nozzle 26 with the elongated end of housing 20 to be threadedly coupled Strengthen the connection sealing between valve nozzle 26 and housing 20, set O-ring 25 to realize the purpose of enhancing sealing property, also Combustion gas can be buffered when spraying to the impact dynamics between housing 20 and the junction of valve nozzle 26, to ensure the overall stabilization of device Performance.

The present embodiment also includes straight tube 17, and the lower end of straight tube 17 is connected with the open end at the top of moving valve 19, institute The axis that straight tube 17 is stated with valve nozzle 26 overlaps.The setting of straight tube 17 shortens operation distance of the combustion gas inside valve nozzle 26, Avoid when increasing gas supply amount, by the combustion gas ejected in through hole 15 and the combustion gas flowed out in the open-top end of moving valve 19 Between form wadding stream, cause residence time of the combustion gas inside valve nozzle 26 while reduce the combustion gas output quantity at fumarole 16；And And the axis of straight tube 17 overlaps with the axis of valve nozzle 26, the combustion that the combustion gas flowed out in through hole 15 and straight tube 17 can be flowed out Gas distinguishes, but finally converges at fumarole 16, ensures the flow ejection efficiency at valve nozzle 26.

Preferably, if the combustion gas of the end of straight tube 17 output is applied directly on the inwall on the top of valve nozzle 26, pass through Plane is launched, and the inwall that combustion gas is possible to from the top of valve nozzle 26 is launched to the side wall inside valve nozzle 26, and then is extended combustion gas and existed The time is persisted in valve nozzle 26, and the inwall on the top of valve nozzle 26 protrudes down along the axis direction of straight tube 17 in the present invention, section The ejection of guide effect, i.e. reduction combustion gas that can be to combustion gas progress to a certain extent for semicircular protuberance, guiding gas are straight Connect along its arc surface and flow at fumarole 16, further improve the gas flow ejection efficiency at valve nozzle 26.

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

1. a kind of liquefied gas branch spraying system for automobile, including air inlet pipe（1）And hollow tube in communication（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 special Sign is：In the hollow tube（2）Inwall is provided with groove（4）, and the spray-hole（3）Groove described in face（4）, described recessed 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 It 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 is connected with 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）Inserted through aperture and 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）Inside is with Blank pipe（2）Inside separates；The magnetic valve（6）Solenoid valve seat including being provided with magnet coil on inwall（23）, described Solenoid valve seat（23）Moving valve is inside disposed with from inside to outside（19）, housing（20）, the housing（20）Upper end stretches out, And in the housing（20）Lower end is provided with the connector of inner hollow（22）, connector（22）Upper end and moving valve（19）Lower end Between leave gap, in housing（20）Elongated end be threaded with valve nozzle（26）, the moving valve（19）Inside is provided with connecting Fitting（22）The air flue of middle part connection（21）, spring（18）It is arranged in air flue, and in the moving valve（19）It is provided with side wall Two and air flue（21）The through hole of connection（15）, moving valve（19）Upper end and valve nozzle（26）Inside connection, and in valve nozzle（26）Top Multiple fumaroles are provided with the circumference at end（16）.

A kind of 2. liquefied gas branch spraying system for automobile according to claim 1, it is characterised in that：It is multiple described Electrothermal tube（7）Between it is parallel with one another.

A kind of 3. liquefied gas branch spraying system for automobile according to claim 1, it is characterised in that：In the pipe 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. liquefied gas branch spraying system for automobile according to claim 1, it is characterised in that：Between described Cushion pad is installed in gap（24）.

A kind of 5. liquefied gas branch spraying system for automobile according to claim 1, it is characterised in that：In the valve Mouth（26）Outer wall and housing（20）The junction of elongated end inwall is provided with O-ring（25）.

A kind of 6. liquefied gas branch spraying system for automobile according to claim 1, it is characterised in that：Also include straight Jet pipe（17）, the straight tube（17）Lower end and moving valve（19）The open end connection at top, the straight tube（17）With valve nozzle （26）Axis overlap.

A kind of 7. liquefied gas branch spraying system for automobile according to claim 6, it is characterised in that：The valve nozzle （26）The inwall on top is along straight tube（17）Axis direction protrudes down, and the section of the protuberance is semicircle.