CN205477978U

CN205477978U - Gas spraying rail

Info

Publication number: CN205477978U
Application number: CN201620090649.1U
Authority: CN
Inventors: 谢成忠
Original assignee: CHENGDU DUJIA ELECTRICAL Co Ltd
Current assignee: CHENGDU DUJIA ELECTRICAL Co Ltd
Priority date: 2016-01-29
Filing date: 2016-01-29
Publication date: 2016-08-17
Anticipated expiration: 2026-01-29

Abstract

The utility model discloses a gas spraying rail, including intake pipe and hollow tube, it has the cross -section to be the recess of major arc to open at the hollow tube inner wall, the jet orifice is just at the bottom of the arc to the recess, be provided with a plurality of electrothermal tubes in the recess, the guide block is installed to the electrothermal tube bottom, it has the guide way with guide block matched with to open bottom the recess, the electrothermal tube includes the body, fill the insulating material inside the body and arrange the inside heating wire of body in, the heating wire end -to -end connection has the terminal, the terminal runs through the aperture to be connected with the wiring picture peg, it has the heat -conducting plate to serve to cover in the opening of recess. A plurality of electric heating pipe place in curved recess, seal up the side of recess through the wiring picture peg, can reduce the heat loss, also conveniently simultaneously put getting of electrothermal tube, and the user can guarantee to accomplish the stable operation to the gas output flow with the heating cost of minimum according to the real -time number of confirming the electrothermal tube of the size of fuel gas supply volume promptly.

Description

A kind of gas injection rail

Technical field

This utility model relates to gas injection rail, specifically refers to a kind of gas injection rail.

Background technology

Gas injection rail is necessaries on CNG-gasoline double-fuel car, but when temperature is relatively low, low temperature makes the contraction of gas in low pressure line, forms negative pressure, make gas injection rail open and be difficult between combustion gas common rail and filter, affects the normal use of gas burning system；By the way of we use hydro-thermal, gas injection rail is heated so that it is can normally work, however it is necessary that installation water route, increase pipeline and interfere, fluid leakage easily occurs, increase maintenance difficulties.

Utility model content

The purpose of this utility model is to provide a kind of gas injection rail, it is ensured that combustion gas normal through, avoid fuel gas pipeline occurs liquid simultaneously.

The purpose of this utility model is achieved through the following technical solutions:

A kind of gas injection rail, including air inlet pipe and hollow pipe in communication, multiple spray-hole is had in hollow pipe upper end, and correspondence is provided with electromagnetic valve on described spray-hole, the groove that cross section is major arc is had at described hollow pipe inwall, and at the bottom of described spray-hole just arc to described groove, multiple electrothermal tube is installed in described groove, guide pad is installed bottom electrothermal tube, and the gathering sill matched with guide pad is had at bottom portion of groove, described electrothermal tube includes body, it is filled in the insulant of tubular body and is placed in the heating wire of tubular body, described heating wire end connects binding post, groove has, away from one end of air inlet pipe, the aperture being in communication with the outside, binding post runs through aperture and is connected with wiring plate, and on the open end of groove, it is coated with heat-conducting plate, described inside grooves is separated by heat-conducting plate with hollow tube；Also include the overheat protector being placed on hollow pipe inwall; described overheat protector includes housing, support and is arranged on enclosure interior and the static contact cooperated, movable contact spring; described static contact is connected with external power source by wire; it is fixed with the first thermal sensitive piece, the second thermal sensitive piece being from top to bottom sequentially stacked on the bracket, and the first thermal sensitive piece is connected with the end of movable contact spring.

During utility model works, combustion gas is injected directly in hollow pipe by air inlet pipe, and after being flowed in electromagnetic valve by spray-hole, accurately regulating and then guaranteeing that combustion gas is maintained at optimal flow output through electromagnetic valve；And relatively low for the air pressure in prior art mesolow pipeline and between the spray rail and the filter that cause, the situation of negative pressure occurs, this utility model just has groove at inwall to spray-hole at hollow pipe, and the cross section of groove is major arc shape, will wrap up in the gas circulation region in hollow pipe, utilize the caloric value of electrothermal tube and the heat transfer of heat-conducting plate, make combustion gas in the ambient temperature entered before hollow pipe in hollow pipe relative to extraneous temperature drift, i.e. pressure in hollow pipe raises, after combustion gas enters hollow pipe, combustion gas is heated up to a certain extent, effectively prevent and produce negative pressure between spray rail and filter and affect the flow velocity of combustion gas, ensure the normal circulation of combustion gas.And, use Electric heating compared with hydro-thermal mode, while there is liquid risk of leakage, the efficiency of heating is greatly improved, and multiple electric heating tube is placed in the groove of arc, is sealed the side of groove by wiring plate, heat loss can be reduced, be also convenient for picking and placeing electrothermal tube, i.e. user can determine the number of electrothermal tube in real time according to the size of fuel gas supply amount simultaneously, it is ensured that completes the stable operation to combustion gas output flow with minimum heating cost；The body bottom of electrothermal tube is provided with guide pad simultaneously; guide pad coordinates with gathering sill; make laying of body more stable; i.e. need not increase new fixed structure and be just capable of the fastening of electrothermal tube; reach optimize spray rail internal structure purpose, and the overheat protector installed can overheated at heating wire or cross stream time timely deenergization, it is to avoid occur heating wire overload and impaired; power supply is reconnected, to ensure continual and steady heating internal to spray rail when temperature keeps stablizing.

Wherein, overheat protector is installed in hollow pipe, when i.e. the ambient temperature in hollow pipe is too high, the electricity of heating wire directly can be exported and interrupt by overheat protector, prevent heating wire overload or cross stream and damage, concrete control mode is as follows, the main part of housing is placed in hollow pipe inwall, by this partial shell, the ambient temperature in hollow pipe is detected in real time, when temperature is too high, first thermal sensitive piece and the second thermal sensitive piece are because of its different coefficient of expansion, make the first thermal sensitive piece and the second thermal sensitive piece that different bendings occur respectively, the movable contact spring being positioned at the first thermal sensitive piece end is i.e. made to separate with static contact, heating wire disconnects with external power source；When temperature is returned to normal level, the first thermal sensitive piece and the second thermal sensitive piece reply its state again so that movable contact spring contacts again with static contact, and then ensure that heating wire works on, and so, greatly reduce heating wire and the impaired probability of electrothermal tube.

Between multiple described electrothermal tubes parallel with one another.During the lasting use of electrothermal tube, the loss of electrothermal tube is relatively large, the most multiple electrothermal tubes there will be the faults such as damage or short circuit, and multiple electrothermal tubes are arranged to parallel connection by this utility model, i.e. when single electrothermal tube breaks down, do not interfere with the normal use of remaining electrothermal tube, to prevent from spraying the output flow deficiency forming negative pressure between rail and filter and cause combustion gas at low ambient temperatures.

Multiple described electrothermal tubes are evenly distributed in the circular arc passage that described groove and heat-conducting plate are formed.As preferably, multiple electrothermal tubes are uniformly distributed so that in hollow pipe, the circulation environment of combustion gas is all the time by the homogeneous radiation of heat, there is not the situation that local temperature is too high or too low, thoroughly stop to spray at low ambient temperatures and negative pressure condition occurs between rail and filter, improve the circulation efficiency of combustion gas.

Being also equipped with aluminium bar at described tubular body, described heating wire winding is on described aluminium bar.When heating wire transships or crosses stream, it is easily caused power of heating wire decline or directly produce fusing, and the aluminium bar installed in body is wound around by heating wire, can ensure that within the regular hour heating wire works on, it is to avoid between spray rail and filter, again form the output flow deficiency of negative pressure and combustion gas.

This utility model compared with prior art, has such advantages as and beneficial effect:

1, this utility model uses Electric heating compared with hydro-thermal mode, while there is liquid risk of leakage, the efficiency of heating is greatly improved, and multiple electric heating tube is placed in the groove of arc, by wiring plate, the side of groove is sealed, heat loss can be reduced, be also convenient for electrothermal tube is picked and placeed simultaneously, i.e. user can determine the number of electrothermal tube in real time according to the size of fuel gas supply amount, it is ensured that completes the stable operation to combustion gas output flow with minimum heating cost；

2, this utility model uses Electric heating compared with hydro-thermal mode, while there is liquid risk of leakage, the efficiency of heating is greatly improved, and multiple electric heating tube is placed in the groove of arc, by wiring plate, the side of groove is sealed, heat loss can be reduced, be also convenient for electrothermal tube is picked and placeed simultaneously, i.e. user can determine the number of electrothermal tube in real time according to the size of fuel gas supply amount, it is ensured that completes the stable operation to combustion gas output flow with minimum heating cost；

3, multiple electrothermal tubes are uniformly distributed by this utility model, make in hollow pipe the circulation environment of combustion gas all the time by the homogeneous radiation of heat, there is not the situation that local temperature is too high or too low, thoroughly stop to spray at low ambient temperatures and negative pressure condition occurs between rail and filter, improve the circulation efficiency of combustion gas.

Accompanying drawing explanation

Accompanying drawing described herein is used for providing being further appreciated by this utility model embodiment, constitutes the part of the application, is not intended that the restriction to this utility model embodiment.In the accompanying drawings:

Fig. 1 is this utility model structural representation；

Fig. 2 is the sectional view of Fig. 1；

Fig. 3 is the structural representation of electrothermal tube；

Fig. 4 is the structural representation of overheat protector；

Labelling and corresponding parts title in accompanying drawing:

1-air inlet pipe, 2-hollow pipe, 3-spray-hole, 4-groove, 5-heat-conducting plate, 6-electromagnetic valve, 7-electrothermal tube, 8-wiring plate, 9-overheat protector, 10-body, 11-insulant, 12-heating wire, 13-guide pad, 14-aluminium bar, 15-binding post, 16-wire, 17-housing, 18-electro-insulating rubber, 19-static contact, 20-movable contact spring, 21-the first thermal sensitive piece, 22-the second thermal sensitive piece, 23-support.

Detailed description of the invention

For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, exemplary embodiment of the present utility model and explanation thereof are only used for explaining this utility model, are not intended as restriction of the present utility model.

Embodiment 1

nullAs shown in Fig. 1 ~ Fig. 4，The present embodiment includes air inlet pipe 1 and hollow pipe 2 in communication，Multiple spray-hole 3 is had in hollow pipe 2 upper end，And correspondence is provided with electromagnetic valve 6 on described spray-hole 3，The groove 4 that cross section is major arc is had at described hollow pipe 2 inwall，And at the bottom of described spray-hole 3 just arc to described groove 4，Multiple electrothermal tube 7 is installed in described groove 4，Guide pad 13 is installed bottom electrothermal tube 7，And bottom groove 4, have the gathering sill matched with guide pad 13，Described electrothermal tube 7 includes body 10、It is filled in the insulant 11 within body 10 and is placed in the heating wire 12 within body 10，Described heating wire 12 end connects binding post 15，Groove 4 has, away from one end of air inlet pipe 1, the aperture being in communication with the outside，Binding post 15 runs through aperture and is connected with wiring plate 8，And on the open end of groove 4, it is coated with heat-conducting plate 5，Heat-conducting plate 5 is by described groove 4 inside and spaced-apart in hollow pipe 2；Also include the overheat protector 9 being placed on hollow pipe 2 inwall; described overheat protector 9 includes housing 17, support 23 and is arranged on housing 17 inside and the static contact 19 cooperated, movable contact spring 20; described static contact 19 is connected with external power source by wire 16; described support 23 is fixed with first thermal sensitive piece the 21, second thermal sensitive piece 22 being from top to bottom sequentially stacked, and the first thermal sensitive piece 21 is connected with the end of movable contact spring 20.

During work, combustion gas is injected directly in hollow pipe 2 by air inlet pipe 1, and is flowed into after in electromagnetic valve 6 by spray-hole 3, accurately regulating and then guaranteeing that combustion gas is maintained at optimal flow output through electromagnetic valve 6；And relatively low for the air pressure in prior art mesolow pipeline and between the spray rail and the filter that cause, the situation of negative pressure occurs, the present embodiment just has groove 4 at inwall to spray-hole 3 at hollow pipe 2, and the cross section of groove 4 is major arc shape, will wrap up in the gas circulation region in hollow pipe 2, utilize caloric value and the heat transfer of heat-conducting plate 5 of electrothermal tube 7, make combustion gas in the ambient temperature entered before hollow pipe 2 in hollow pipe 2 relative to extraneous temperature drift, i.e. pressure in hollow pipe 2 raises, after combustion gas enters hollow pipe 2, combustion gas is heated up to a certain extent, effectively prevent and produce negative pressure between spray rail and filter and affect the flow velocity of combustion gas, ensure the normal circulation of combustion gas.

And, use Electric heating compared with hydro-thermal mode, while there is liquid risk of leakage, the efficiency of heating is greatly improved, and multiple electric heating tube is placed in the groove 4 of arc, is sealed the side of groove 4 by wiring plate 8, heat loss can be reduced, it is also convenient for picking and placeing electrothermal tube 7, i.e. user simultaneously and can determine the number of electrothermal tube 7 according to the size of fuel gas supply amount in real time, it is ensured that complete the stable operation to combustion gas output flow with minimum heating cost；Body 10 bottom of electrothermal tube 7 is provided with guide pad 13 simultaneously; guide pad 13 coordinates with gathering sill; make laying of body 10 more stable; i.e. need not increase new fixed structure and be just capable of the fastening of electrothermal tube 7; reach to optimize the purpose of spray rail internal structure; and the overheat protector 9 installed can overheated at heating wire 12 or cross stream time timely deenergization; avoid the occurrence of heating wire 12 to transship and impaired; power supply is reconnected, to ensure continual and steady heating internal to spray rail when temperature keeps stablizing.nullOverheat protector 9 is installed in hollow pipe 2，When i.e. the ambient temperature in hollow pipe 2 is too high，The electricity of heating wire 12 directly can be exported and interrupt by overheat protector 9，Prevent heating wire 12 from transshipping or cross stream and damage，Concrete control mode is as follows，The main part of housing 17 is placed in hollow pipe 2 inwall，By this partial shell 17, the ambient temperature in hollow pipe 2 is detected in real time，Wire 16 is sealed by electro-insulating rubber 18 with the junction of static contact 19 simultaneously，When temperature is too high，First thermal sensitive piece 21 from the second thermal sensitive piece 22 because of its different coefficient of expansion，Make the first thermal sensitive piece 21, from the second thermal sensitive piece 22, different bendings occur respectively，The movable contact spring 20 being positioned at the first thermal sensitive piece 21 end is i.e. made to separate with static contact 19，Heating wire 12 disconnects with external power source；When temperature is returned to normal level, first thermal sensitive piece 21 and the second thermal sensitive piece 22 reply its state again so that movable contact spring 20 contacts again with static contact 19, and then ensure that heating wire 12 works on, so, heating wire 12 and the impaired probability of electrothermal tube are greatly reduced.

Wherein, during the lasting use of electrothermal tube 7, the loss of electrothermal tube 7 is relatively large, the most multiple electrothermal tubes 7 there will be the faults such as damage or short circuit, and multiple electrothermal tubes 7 are arranged to parallel connection by the present embodiment, i.e. when single electrothermal tube 7 breaks down, do not interfere with the normal use of remaining electrothermal tube 7, to prevent from spraying the output flow deficiency forming negative pressure between rail and filter and cause combustion gas at low ambient temperatures.

As preferably, multiple electrothermal tubes 7 are uniformly distributed, make in hollow pipe 2 circulation environment of combustion gas all the time by the homogeneous radiation of heat, there is not the situation that local temperature is too high or too low, thoroughly stop to spray at low ambient temperatures and negative pressure condition occurs between rail and filter, improve the circulation efficiency of combustion gas.

As preferably, being also equipped with aluminium bar 14 inside described body 10, described heating wire 12 is wrapped on described aluminium bar 14.When heating wire 12 transships or crosses stream, it is easily caused heating wire 12 power drop or directly produces fusing, and the aluminium bar 14 installed in body 10 is wound around by heating wire 12, can ensure that within the regular hour heating wire 12 works on, it is to avoid between spray rail and filter, again form the output flow deficiency of negative pressure and combustion gas.

Above-described detailed description of the invention; the purpose of this utility model, technical scheme and beneficial effect are further described; it is it should be understood that; the foregoing is only detailed description of the invention of the present utility model; it is not used to limit protection domain of the present utility model; all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. done, within should be included in protection domain of the present utility model.

Claims

null1. a gas injection rail，Including air inlet pipe (1) and hollow pipe (2) in communication，Multiple spray-hole (3) is had in hollow pipe (2) upper end，And in described spray-hole (3) upper correspondence, electromagnetic valve (6) is installed，It is characterized in that: have, at described hollow pipe (2) inwall, the groove (4) that cross section is major arc，And at the bottom of described spray-hole (3) just arc to described groove (4)，Multiple electrothermal tube (7) is installed in described groove (4)，Electrothermal tube (7) bottom is provided with guide pad (13)，And have, in groove (4) bottom, the gathering sill matched with guide pad (13)，Described electrothermal tube (7) includes body (10)、It is filled in the internal insulant (11) of body (10) and is placed in the heating wire (12) that body (10) is internal，Described heating wire (12) end connects binding post (15)，Groove (4) has, away from one end of air inlet pipe (1), the aperture being in communication with the outside，Binding post (15) runs through aperture and is connected with wiring plate (8)，And on the open end of groove (4), it is coated with heat-conducting plate (5)，Heat-conducting plate (5) is by internal for described groove (4) and hollow pipe (2) interior spaced-apart；Also include the overheat protector (9) being placed on hollow pipe (2) inwall; described overheat protector (9) includes housing (17), support (23) and is arranged on housing (17) inside and the static contact (19) cooperated, movable contact spring (20); described static contact (19) is connected with external power source by wire (16); described support (23) is fixed with the first thermal sensitive piece (21), the second thermal sensitive piece (22) being from top to bottom sequentially stacked, and the first thermal sensitive piece (21) is connected with the end of movable contact spring (20).
A kind of gas injection rail the most according to claim 1, it is characterised in that: parallel with one another between multiple described electrothermal tubes (7).
A kind of gas injection rail the most according to claim 1, it is characterised in that: multiple described electrothermal tubes (7) are evenly distributed in the circular arc passage that described groove (4) and heat-conducting plate (5) are formed.
A kind of gas injection rail the most according to claim 1, it is characterised in that: being also equipped with aluminium bar (14) in described body (10) inside, described heating wire (12) is wrapped on described aluminium bar (14).