CN203452932U - Anti-backfire safety valve of engine - Google Patents
Anti-backfire safety valve of engine Download PDFInfo
- Publication number
- CN203452932U CN203452932U CN201320536103.0U CN201320536103U CN203452932U CN 203452932 U CN203452932 U CN 203452932U CN 201320536103 U CN201320536103 U CN 201320536103U CN 203452932 U CN203452932 U CN 203452932U
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- Prior art keywords
- valve
- valve body
- valve rod
- diameter end
- motor
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- 238000007789 sealing Methods 0.000 claims abstract description 56
- 230000000694 effects Effects 0.000 abstract description 9
- 230000035945 sensitivity Effects 0.000 abstract description 8
- 238000003912 environmental pollution Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000005496 tempering Methods 0.000 description 3
- 238000013475 authorization Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Safety Valves (AREA)
Abstract
The utility model provides an engine anti-backfire safety valve, which comprises a valve body, the case, the inside of valve body is provided with the case, the valve rod pipe, the case includes interconnect's seal receptacle, the valve rod, the seal receptacle is the taper type structure, including big diameter end, the minor diameter end, the inlet end is provided with the sealed face with seal receptacle matched with, big diameter end, the minor diameter end respectively with the top of sealed face, the bottom seal cooperation of sealed face, the big diameter end of seal receptacle and the one end fixed connection of valve rod, the other end of valve rod passes valve rod pipe after-fixing at the top of valve rod pipe, and the middle part of valve rod is provided with spacing boss, the outside cover of valve rod is equipped with return spring, the inlet end of valve body is connected with the intake pipe of engine, the end of giving vent to anger of valve body. The design can improve the air inlet surge phenomenon of the engine, and has good sealing effect and high sensitivity; in addition, the design can also reduce environmental pollution and ensure normal execution of pressure relief operation.
Description
Technical field
The utility model relates to a kind of safety protection device of motor, relates in particular to a kind of motor backfireproof safety valve, is specifically applicable to improve sealing effect, improves sensitivity, reduces environmental pollution.
Background technique
Shortage of resources and environmental pollution make internal-combustion engine production firm Devoting Major Efforts To Developing natural gas engine, present stage, natural gas engine all converts on diesel engine or petrol engine basis, Spark ignition type gas engine is all to concentrate with single-point the air inlet supply mode spraying, belong to premixed combustion mode, fuel mixes by suction tude, air flue and enters firing chamber with air.If engine air distribution system is unreasonable or the damage of components such as ignition system, spark plug, easily produce the phenomenons such as undesired igniting, cause engine flashback, cause the acute burning generation of the mixing air exhaustion immense pressure in suction tude to cause the mechanical failures such as engine air throttle damage.
Chinese patent notice of authorization number is CN2816388Y, notice of authorization day is that the utility model patent on September 13rd, 2006 discloses a kind of blasting proof valve of gas engine, comprise the pipe type valve seat being connected with engine air inlet tube, the sealed valve body of passage that can shutoff valve seat, return spring, one end of described return spring connects sealed valve body, the other end is connected with the guide holder with pilot hole, when the unexpected tempering of gas engine causes pressure in suction tude to surpass safety pressure value, in pipe, gas will promote sealed valve body away from valve seat so that gas is discharged along the gap between valve seat and sealed valve body, Pressure Drop in suction tude is during to safety value, return spring promotes sealed valve body and restores, engine work.Although this model utility has solved gas engine infringement to suction tude, filter cleaner and intercooler when tempering, but still has following defect:
1, in this model utility, sealed valve body is cylindrical structure, and this structure not only makes the sealing effect between sealed valve body and housing poor, and its sensitivity for pressure change is also lower;
2, this model utility is being provided with a plurality of bleeder ports near valve seat and sealed valve body place, and after sealed valve body is opened, the inflammable gas in suction tude can enter atmosphere by bleeder port, to environment.
Summary of the invention
The purpose of this utility model is to overcome that the sealing effect existing in prior art is poor, sensitivity is lower, the problem of befouling environment, provide a kind of sealing effect better, sensitivity is higher and can effectively reduce the motor backfireproof safety valve of environmental pollution.
For realizing above object, the technical solution of the utility model is as follows:
A kind of motor backfireproof safety valve, comprise valve body, spool, return spring, the inlet end of described valve body is connected with the suction tude of motor, the inside of described valve body is provided with spool, described spool comprises interconnective sealing seat, valve rod, described sealing seat and inlet end are sealed and matched, and the outer cover of described valve rod is provided with return spring;
Described sealing seat is tapered structure, comprises larger diameter end, smaller diameter end, and described inlet end is provided with the sealing surface matching with sealing seat, and described larger diameter end coordinates with the top seal of sealing surface, and described smaller diameter end coordinates with the sealed bottom of sealing surface.
Described larger diameter end is fixedly connected with one end of valve rod, and the other end of described valve rod is through be fixed on the top of valve stem guide after the valve stem guide of valve inner setting by nut.
Described larger diameter end is provided with valve core spring seat, and the bottom of described valve stem guide is provided with the valve body spring seat corresponding with valve core spring seat, and the two ends of described return spring are pressed against respectively in valve core spring seat, valve body spring seat.
The middle part of described valve rod is provided with positive stop lug boss.
The inlet end of described valve body is connected with the suction tude of motor by joint, and the outlet side of valve body is fixedly connected with one end of valve gap, and the other end of described valve gap is connected with the outlet side pipeline of air-strainer by being set in its outside sebific duct.
Compared with prior art, the beneficial effects of the utility model are:
1, in a kind of motor backfireproof of the utility model safety valve, sealing seat is tapered structure, comprise larger diameter end, smaller diameter end, and inlet end is provided with the sealing surface matching with sealing seat, described larger diameter end coordinates with the top seal of sealing surface, described smaller diameter end coordinates with the sealed bottom of sealing surface, the inlet end that is valve body adopts conical surface sealing structure, on the one hand, when air pressure in engine air inlet tube is uneven, inlet end can be in micro-opening state under the promotion of air pressure, thereby complete pressure release operation, improve the air inlet surging phenomenon of motor, on the other hand, this design not only makes between sealing seat and inlet end, to have good sealing effect, and improved the sensitivity of spool for pressure change.Therefore, the utility model not only can improve the air inlet surging phenomenon of motor, and sealing effect is better, and sensitivity is higher.
2, in a kind of motor backfireproof of the utility model safety valve, the inlet end of valve body and the suction tude of motor are connected, the outlet side of valve body is connected with the outlet side pipeline of air-strainer, this structure not only makes whole device form confined space, effectively prevented that the flammable mixed gas that suction tude from motor enters valve body from entering pollution of atmosphere environment, and can again get back in the suction tude of motor via the outlet side pipeline of air-strainer from the mixed gas of outlet side discharge, effectively mentioned the utilization ratio of the energy.Therefore, the utility model has not only reduced environmental pollution, and has mentioned energy utilization rate.
3, in a kind of motor backfireproof of the utility model safety valve, the outer cover of valve rod is provided with return spring, the middle part of valve rod is provided with positive stop lug boss, return spring and positive stop lug boss can jointly prevent valve rod because of displacement cross ambassador's sealing seat block that the outlet passageway of mixed gas causes cannot pressure release, thereby guarantee the normal execution of safety valve pressure release operation.Therefore, the utility model has guaranteed the normal execution of safety valve pressure release operation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of spool in Fig. 1.
In figure: valve body 1, valve stem guide 11, valve body spring seat 111, inlet end 12, sealing surface 121, outlet side 13, spool 2, sealing seat 21, valve core spring seat 211, larger diameter end 212, smaller diameter end 213, valve rod 22, positive stop lug boss 221, return spring 3, nut 4, joint 5, valve gap 6, sebific duct 7.
Embodiment
Below in conjunction with accompanying drawing explanation and embodiment, the utility model is described in further detail.
Referring to figure 1 ?Fig. 2, a kind of motor backfireproof safety valve, comprise valve body 1, spool 2, return spring 3, the inlet end 12 of described valve body 1 is connected with the suction tude of motor, the inside of described valve body 1 is provided with spool 2, described spool 2 comprises interconnective sealing seat 21, valve rod 22, and described sealing seat 21 is sealed and matched with inlet end 12, and the outer cover of described valve rod 22 is provided with return spring 3;
Described sealing seat 21 is tapered structure, comprise larger diameter end 212, smaller diameter end 213, described inlet end 12 is provided with the sealing surface 121 matching with sealing seat 21, described larger diameter end 212 coordinates with the top seal of sealing surface 121, and described smaller diameter end 213 coordinates with the sealed bottom of sealing surface 121.
Described larger diameter end 212 is fixedly connected with one end of valve rod 22, is fixed on the top of valve stem guide 11 after the valve stem guide 11 that the other end of described valve rod 22 arranges through valve body 1 inside by nut 4.
Described larger diameter end 212 is provided with valve core spring seat 211, and the bottom of described valve stem guide 11 is provided with the valve body spring seat 111 corresponding with valve core spring seat 211, and the two ends of described return spring 3 are pressed against respectively in valve core spring seat 211, valve body spring seat 111.
The middle part of described valve rod 22 is provided with positive stop lug boss 221.
The inlet end 12 of described valve body 1 is connected with the suction tude of motor by joint 5, the outlet side 13 of valve body 1 is fixedly connected with one end of valve gap 6, and the other end of described valve gap 6 is connected with the outlet side pipeline of air-strainer by being set in its outside sebific duct 7.
Principle of the present utility model is described as follows:
Backfireproof principle: under motor normal operating condition, return spring 3 promotes sealing seat 21, make inlet end 12 close contacts of itself and valve body 1, play seal action, when the unexpected tempering of motor, while making the interior generation of suction tude immense pressure, high pressure air in suction tude fails to be convened for lack of a quorum and promotes sealing seat 21 and depart from and the contacting of inlet end 12, now, flammable mixed gas cognition in engine air inlet tube enters valve body 1 inside by inlet end 12, thereby the air pressure in reduction suction tude, when the air pressure in suction tude is reduced in safety value, return spring 3 promotes sealing seat 21 and contacts with inlet end 12 sealings, engine work.
Improve the principle of engine charge surge: the component such as engine supercharger, intake manifold produce pressure surge because its foozle can make engine charge supply system, engine charge uniformity variation, cause engine charge surge, and then affect engine performance.The sealing seat 21 being sealed and matched with the inlet end 12 of valve body 1 in the utility model is tapered structure, when motor produces air inlet surge, sealing seat 21 departs from and contacts with the sealing of sealing surface 121 bottoms with the smaller diameter end 213 of inlet end 12 under the promotion of gas, be inlet end 12 in micro-opening state, thereby complete pressure release operation.
In the utility model, the inlet end 12 of valve body 1 is connected with the suction tude of motor, the outlet side 13 of valve body 1 is fixedly connected with one end of valve gap 6, the other end of valve gap 6 is connected with the outlet side pipeline of air-strainer by being set in its outside sebific duct 7, because the suction tude inside of motor is negative pressure, therefore the flammable mixed gas being entered in valve body 1 by engine air inlet tube is known from experience successively via valve gap 6, sebific duct 7, the outlet side pipeline of air-strainer is got back to formation loop in engine air inlet tube, not only effectively avoided mixed gas to enter pollution of atmosphere environment, and improved the utilization ratio of the energy.
When air pressure in engine air inlet tube is excessive, the continuous top to valve body 1 of sealing seat 21 meeting under the effect of high pressure draught moves to its larger diameter end 212 and contacts with the inwall of valve body 1, now sealing seat 21 can be blocked the outlet passageway of mixed gas, cause mixed gas cannot be from outlet side 13 to discharge, and then cannot complete pressure release operation, therefore the utility model is provided with positive stop lug boss 221 at the middle part of valve rod 22, this positive stop lug boss 221 can effectively stop sealing seat 21 displacements excessive and contact with the inwall of valve body 1, thereby guaranteed the normal execution of safety valve pressure release operation.
Embodiment 1:
Referring to figure 1 ?Fig. 2, a kind of motor backfireproof safety valve, comprise valve body 1, spool 2, the inside of described valve body 1 is provided with spool 2, valve stem guide 11, described spool 2 comprises interconnective sealing seat 21, valve rod 22, described sealing seat 21 is tapered structure, comprise larger diameter end 212, smaller diameter end 213, described inlet end 12 is provided with the sealing surface 121 matching with sealing seat 21, described larger diameter end 212, smaller diameter end 213 respectively with the top of sealing surface 121, the sealed bottom of sealing surface 121 coordinates, described larger diameter end 212 is provided with valve core spring seat 211, the middle part of described valve rod 22 is provided with positive stop lug boss 221, the outer cover of valve rod 22 is provided with return spring 3, the bottom of described valve stem guide 11 is provided with the valve body spring seat 111 corresponding with valve core spring seat 211, described larger diameter end 212 is fixedly connected with one end of valve rod 22, the other end of described valve rod 22 is through be fixed on the top of valve stem guide 11 after valve stem guide 11 by nut 4, the two ends of described return spring 3 are pressed against respectively valve core spring seat 211, in valve body spring seat 111, the inlet end 12 of described valve body 1 is connected with the suction tude of motor by joint 5, the outlet side 13 of valve body 1 is fixedly connected with one end of valve gap 6, the other end of described valve gap 6 is connected with the outlet side pipeline of air-strainer by being set in its outside sebific duct 7.
The utility model not only can improve the air inlet surging phenomenon of motor, and sealing effect is better, and sensitivity is higher; In addition, the utility model can also reduce environmental pollution, guarantee the normal execution that pressure release operates.
Claims (5)
1. a motor backfireproof safety valve, comprise valve body (1), spool (2), return spring (3), the inlet end (12) of described valve body (1) is connected with the suction tude of motor, the inside of described valve body (1) is provided with spool (2), described spool (2) comprises interconnective sealing seat (21), valve rod (22), described sealing seat (21) is sealed and matched with inlet end (12), and the outer cover of described valve rod (22) is provided with return spring (3), it is characterized in that:
Described sealing seat (21) is tapered structure, comprise larger diameter end (212), smaller diameter end (213), described inlet end (12) is provided with the sealing surface (121) matching with sealing seat (21), described larger diameter end (212) coordinates with the top seal of sealing surface (121), and described smaller diameter end (213) coordinates with the sealed bottom of sealing surface (121).
2. a kind of motor backfireproof safety valve according to claim 1, it is characterized in that: described larger diameter end (212) is fixedly connected with one end of valve rod (22), the other end of described valve rod (22) is through the rear top that is fixed on valve stem guide (11) by nut (4) of the inner valve stem guide (11) arranging of valve body (1).
3. a kind of motor backfireproof safety valve according to claim 2, it is characterized in that: described larger diameter end (212) is provided with valve core spring seat (211), the bottom of described valve stem guide (11) is provided with the valve body spring seat (111) corresponding with valve core spring seat (211), and the two ends of described return spring (3) are pressed against respectively in valve core spring seat (211), valve body spring seat (111).
4. according to a kind of motor backfireproof safety valve described in claim 2 or 3, it is characterized in that: the middle part of described valve rod (22) is provided with positive stop lug boss (221).
According to claim 1 ?a kind of motor backfireproof safety valve described in any one in 3, it is characterized in that: the inlet end (12) of described valve body (1) is connected with the suction tude of motor by joint (5), the outlet side (13) of valve body (1) is fixedly connected with one end of valve gap (6), and the other end of described valve gap (6) is connected with the outlet side pipeline of air-strainer by being set in its outside sebific duct (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320536103.0U CN203452932U (en) | 2013-08-30 | 2013-08-30 | Anti-backfire safety valve of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320536103.0U CN203452932U (en) | 2013-08-30 | 2013-08-30 | Anti-backfire safety valve of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203452932U true CN203452932U (en) | 2014-02-26 |
Family
ID=50132814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320536103.0U Expired - Lifetime CN203452932U (en) | 2013-08-30 | 2013-08-30 | Anti-backfire safety valve of engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203452932U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437916A (en) * | 2013-08-30 | 2013-12-11 | 东风商用车有限公司 | Anti-backfire safety valve of engine |
| CN104033296A (en) * | 2014-06-13 | 2014-09-10 | 广东宾士动力科技有限公司 | Explosion-proof pressure relief valve for gas engine |
| CN104791133A (en) * | 2015-03-17 | 2015-07-22 | 南京理工大学 | Automatic anti-backfire device for pasty propellant rocket motor |
-
2013
- 2013-08-30 CN CN201320536103.0U patent/CN203452932U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437916A (en) * | 2013-08-30 | 2013-12-11 | 东风商用车有限公司 | Anti-backfire safety valve of engine |
| CN103437916B (en) * | 2013-08-30 | 2015-10-14 | 东风商用车有限公司 | Anti-backfire safety valve of engine |
| CN104033296A (en) * | 2014-06-13 | 2014-09-10 | 广东宾士动力科技有限公司 | Explosion-proof pressure relief valve for gas engine |
| CN104791133A (en) * | 2015-03-17 | 2015-07-22 | 南京理工大学 | Automatic anti-backfire device for pasty propellant rocket motor |
| CN104791133B (en) * | 2015-03-17 | 2016-07-06 | 南京理工大学 | A kind of automatic fireproof tempering device being applied to Pasty Propellant Rocket Engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140226 Effective date of abandoning: 20151014 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |