CN110173376A - A kind of gas engine and its leakage detection method - Google Patents
A kind of gas engine and its leakage detection method Download PDFInfo
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- CN110173376A CN110173376A CN201910492338.6A CN201910492338A CN110173376A CN 110173376 A CN110173376 A CN 110173376A CN 201910492338 A CN201910492338 A CN 201910492338A CN 110173376 A CN110173376 A CN 110173376A
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- fuel gas
- gas pipeline
- valve
- pipe road
- engine
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0293—Safety devices; Fail-safe measures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses a kind of gas engines, comprising: the inlet end of fuel gas pipeline, the fuel gas pipeline is provided with pressure regulator valve, and the exhaust outlet of the fuel gas pipeline is provided with exhaust solenoid valve, is provided with pressure sensor on the fuel gas pipeline；Inert gas source, the inert gas source connect the pressure regulator valve by intake solenoid valve.The invention also discloses a kind of leakage detection methods of gas engine.The device and method are detected before gas engine starts every time by leakproofness of the inert gas to fuel gas pipeline system to improve the safety of gas engine.
Description
Technical field
The present invention relates to engine failure detection fields, and more specifically, particularly relate to a kind of gas engine and its
Leakage detection method.
Background technique
Natural gas, coal gas, biogas that gas engine uses etc. belong to hazardous gas, and fuel gas pipeline once leaks
It may lead ignition calamity even to explode, jeopardize personnel and property safety, so gas engine has gas leakage to detect and protect
Protective function.And prior art be all pipeline leakage occur after detect, and it is rare to gas engine starting before fuel gas conduit
The state on road is detected.
Some installs combustible gas probe around gas engine, when pipeline leakage combustion gas can be detected, control
System processed issues alarm signal and executes corresponding protection act.
Some gas engines install pressure sensor on fuel gas pipeline, when gaseous-pressure lower than setting value is in pipeline
There is leakage in pipeline, control system issues alarm signal and executes corresponding protection act.
Either combustible gas probe still installs pressure sensor, is all the fuel gas conduit after gas engine starting
Road has occurred and that leakage can be just detected, so still there is security risk.
The gas pipeline leakage detection system and detection method of a kind of gas engine are disclosed, not yet in the prior art with solution
Certainly above-mentioned technical problem.
Summary of the invention
In view of this, the purpose of the embodiment of the present invention is to propose a kind of gas pipeline leakage detection system of gas engine
System and detection method, the system and method are before gas engine starts every time, by inert gas to fuel gas pipeline system
Leakproofness is detected to improve the safety of gas engine.
Based on above-mentioned purpose, the one side of the embodiment of the present invention provides a kind of gas engine, comprising:
Fuel gas pipeline, the inlet end of the fuel gas pipeline are provided with pressure regulator valve, and the exhaust outlet of fuel gas pipeline is provided with exhaust electricity
Magnet valve is provided with pressure sensor on fuel gas pipeline；
Inert gas source, the inert gas source connect pressure regulator valve by intake solenoid valve.
In some embodiments, which further includes interlocking valve group, and pressure regulator valve passes through interlocking valve group connection combustion
Gas source, also, inert gas source between interlocking valve group and pressure regulator valve by accessing.
In some embodiments, fuel gas pipeline includes main combustible pipe road and pre- fuel gas pipeline, wherein
In main combustible pipe road, the inlet end on main combustible pipe road is arranged in the first pressure regulator valve, and first pressure sensor setting exists
The exhaust end on main combustible pipe road is arranged in main combustible pipe road, the first solenoid valve；
In pre- fuel gas pipeline, the inlet end of pre- fuel gas pipeline is arranged in the second pressure regulator valve, and the setting of second pressure sensor exists
On pre- fuel gas pipeline, the exhaust end of pre- fuel gas pipeline is arranged in second solenoid valve；
First pressure regulator valve and the second pressure regulator valve are connected in parallel interlocking valve group.
In some embodiments, the first pressure regulator valve and the second pressure regulator valve are connected in parallel intake solenoid valve.
In some embodiments, be disposed between inert gas source and intake solenoid valve shut-off valve, filter with
And the 4th pressure sensor.
In some embodiments, interlocking valve group includes a two position three-way valve and a two position two-way valve.
The another aspect of the embodiment of the present invention additionally provides a kind of leakage detection method of gas engine, including following
Step:
Inert gas is passed through in main combustible pipe road and pre- fuel gas pipeline before gas engine starting and detects whether to leak?
If so, alarm leakage, No starting gas engine,
If it is not, then starting gas engine.
In some embodiments, whether detection fuel gas pipeline, which leaks, includes:
S1: the enabled instruction of engine is received；
S2: each leading into main combustible pipe road and pre- fuel gas pipeline for inert gas,
The detection of main combustible pipe road: whether the gas pressure value on the first setting time detection main combustible pipe road sets less than second
Definite value, if so, carrying out step S3；
The detection of pre- fuel gas pipeline: whether set less than third in the gas pressure value that the second setting time detects pre- fuel gas pipeline
Definite value, if so, carrying out step S4；
If main combustible pipe road testing result and pre- fuel gas pipeline testing result be it is no, carry out step S5；
S3: the leakage of alarm main combustible pipe road, No starting engine；
S4: pre- gas pipeline leakage of alarming, No starting engine；
S5: starting engine.
In some embodiments, this method further include:
Main combustible pipe road detection further include: stop inert gas and be passed through, on third setting time detection main combustible pipe road
Whether gas pressure value is less than the 4th setting value, if so, carrying out step S3；
Pre- fuel gas pipeline detection further include: stop inert gas and be passed through, detect pre- fuel gas pipeline in the 4th setting time
Whether gas pressure value is less than the 5th setting value, if so, carrying out step S4.
In some embodiments, this method further include:
Before inert gas to be each led into main combustible pipe road and pre- fuel gas pipeline, detection inert gas source pressure whether
In first range of set value, if so, step S2 is carried out, if it is not, inert gas source topping up is then given, until pressure is the
After in two ranges of set value, step S2 is carried out.
The present invention has following advantageous effects: a kind of gas engine provided in an embodiment of the present invention and its leakage inspection
Survey method, including main combustible pipe road leak detection process and pre- fuel gas pipeline leak detection process:
(1) by introducing inert gas such as nitrogen, and pass through pressure regulator valve, pressure sensor and exhaust solenoid valve
It cooperates, realizes before gas engine starts every time, to the sealing propertytest of fuel gas pipeline system, change existing skill
Detection in art fuel gas pipeline just must can be carried out and existing safety in the case where having occurred and that leakage after the engine started
Risk, to improve the safety of gas engine；
(2) during main combustible pipe road leak detection process and pre- fuel gas pipeline leak detection, one is opened in pressure regulator valve
It fixes time and closes in the case of two kinds of certain time, measure the pressure in fuel gas pipeline and be compared to determine whether gas
Leakage occurs, and improves the accuracy of measurement.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the schematic diagram of gas engine provided by the invention；
Fig. 2 is the main combustible pipe road pressure of gas engine and the schematic diagram of the relationship between the time in Fig. 1；
Fig. 3 is the schematic diagram of pre- the fuel gas pipeline pressure and the relationship between the time of the gas engine in Fig. 1；
Fig. 4 is the flow diagram of the leakage detection method of gas engine provided by the invention；
Fig. 5 is the detailed process schematic diagram of the leakage detection method of gas engine provided by the invention；
Fig. 6 is the detailed process schematic diagram of the step 3 of the leakage detection method of the gas engine in Fig. 5；
Fig. 7 is the detailed process schematic diagram of the step 4 of the leakage detection method of the gas engine in Fig. 5.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
The embodiment of the present invention is further described in attached drawing.
It should be noted that all statements for using " first " and " second " are for differentiation two in the embodiment of the present invention
The non-equal entity of a same names or non-equal parameter, it is seen that " first " " second " only for the convenience of statement, does not answer
It is interpreted as the restriction to the embodiment of the present invention, subsequent embodiment no longer illustrates this one by one.
Based on above-mentioned purpose, the first aspect of the embodiment of the present invention proposes a kind of embodiment of gas engine.Figure
1 shows the schematic diagram of the embodiment of gas engine provided by the invention.
A kind of gas engine, comprising:
The inlet end of fuel gas pipeline, the fuel gas pipeline is provided with pressure regulator valve, and the exhaust outlet of the fuel gas pipeline is provided with exhaust
Solenoid valve is provided with pressure sensor on the fuel gas pipeline；
Inert gas source, the inert gas source connect pressure regulator valve by intake solenoid valve.
As shown in Figure 1, gas engine of the invention includes fuel gas pipeline system, first it is passed through before connecing combustion gas body lazy
Property gas, such as nitrogen carry out leak detection.Before gas engine starts every time, inert gas is passed through gas engine
Main combustible pipe road 22 and pre- fuel gas pipeline 23, and the cooperation mutual by above-mentioned component detect the close of fuel gas pipeline system
Envelope property is to improve the safety of gas engine.
In one embodiment, which further includes interlocking valve group, and pressure regulator valve passes through interlocking valve group connection combustion
Gas source, also, inert gas source between interlocking valve group and pressure regulator valve by accessing.
In one embodiment, fuel gas pipeline includes main combustible pipe road 22 and pre- fuel gas pipeline 23, wherein
In main combustible pipe road 22, the inlet end on main combustible pipe road 22, first pressure sensor 9 is arranged in the first pressure regulator valve 8
It is arranged on main combustible pipe road 22, the exhaust end on main combustible pipe road 22 is arranged in the first solenoid valve 12；
In pre- fuel gas pipeline 23, the inlet end of pre- fuel gas pipeline 23, second pressure sensor is arranged in the second pressure regulator valve 17
16 are arranged on pre- fuel gas pipeline 23, and the exhaust end of pre- fuel gas pipeline 23 is arranged in second solenoid valve 13；
First pressure regulator valve 8 and the second pressure regulator valve 17 are connected in parallel interlocking valve group.
As shown in Figure 1, fuel gas pipeline system of the invention includes main combustible pipe road 22 and pre- fuel gas pipeline 23, the main combustion gas
The inlet end of pipeline 22 and pre- fuel gas pipeline 23 is connected to respectively powers off normally opened the first pressure regulator valve 8 and the second pressure regulator valve 17, exhaust
End is separately installed with the first solenoid valve 12 and second solenoid valve 13 for exhaust, and the first solenoid valve 12 and second solenoid valve 13 are again
It is separately connected air exit C and air exit D.First pressure biography is separately installed on main combustible pipe road 22 and pre- fuel gas pipeline 23
Sensor 9 and second pressure sensor 16, wherein first pressure sensor 9 is first pressure transmitter.Second pressure sensor 16
For second pressure transmitter.Nitrogen sparge tube road is connected between interlocking valve group and pressure regulator valve, that is, as shown in Figure 1 first
Vertical pipeline part between pressure regulator valve 8 and the second pressure regulator valve 17.
In one embodiment, the first pressure regulator valve 8 and the second pressure regulator valve 17 are connected in parallel intake solenoid valve 18.
In one embodiment, shut-off valve 21, filtering are disposed between inert gas source and intake solenoid valve 18
Device 20 and the 4th pressure sensor 19.
Wherein, inert gas source is connected to the input of the first pressure regulator valve 8 and the second pressure regulator valve 17 by intake solenoid valve 18
End, wherein inert gas is preferably nitrogen.
In one embodiment, interlocking valve group includes a two position three-way valve 6 and a two position two-way valve 7.
Wherein, as shown in Figure 1, two position three-way valve 6 connects air exit B.Main combustible pipe road 22 and pre- fuel gas pipeline 23
It is arranged in parallel to reduce and be taken up space, to reduce the volume of gas engine.Fuel gas source passes through by two position three-way valve 6 and two
The interlocking valve group that position two-port valve 7 is constituted is connected to the input terminal of the first pressure regulator valve 8 and the second pressure regulator valve 17.Solenoid valve 5 is located at exhaust
Export A branch on, the quantity of snifting valve 10 and cylinder head 11 be it is identical, preferred amount be 6, and each pair of snifting valve 10 and
Cylinder head 11 is disposed in parallel between each other.Third pressure sensor 3 is third pressure transmitter.Check valve 15 and precombustion chamber
14 quantity be it is identical, preferred amount be 6, and each pair of check valve 15 and precombustion chamber 14 be between each other it is disposed in parallel with
Conducive to reduce its shared by space.
Based on above-mentioned purpose, the second aspect of the embodiment of the present invention proposes a kind of leak detection of gas engine
The embodiment of method.Fig. 2 shows the signals of the main combustible pipe road pressure of gas engine in Fig. 1 and the relationship between the time
Figure；Fig. 3 shows the schematic diagram of pre- the fuel gas pipeline pressure and the relationship between the time of the gas engine in Fig. 1；Fig. 4 is shown
The flow diagram of the leakage detection method of gas engine provided by the invention；Fig. 5 shows gas provided by the invention
The detailed process schematic diagram of the leakage detection method of engine；Fig. 6 shows the leakage detection method of the gas engine in Fig. 5
Step 3 detailed process schematic diagram；Fig. 7 shows the detailed of the step 4 of the leakage detection method of the gas engine in Fig. 5
Flow diagram.
A kind of leakage detection method of gas engine, it is preferable that the following steps are included:
Inert gas is passed through in main combustible pipe road 22 and pre- fuel gas pipeline 23 before gas engine starting and is detected whether
Leakage?
If so, alarm leakage, No starting gas engine,
If it is not, then starting gas engine.
Wherein as shown in figure 4, realizing the leakage feelings of the fuel gas pipeline of gas engine before activation by the above method
Condition detection.
In one embodiment, whether detection fuel gas pipeline, which leaks, includes:
S1: the enabled instruction of engine is received；
S2: each leading into main combustible pipe road 22 and pre- fuel gas pipeline 23 for inert gas,
Detect on main combustible pipe road 22: the first setting time detection main combustible pipe road 22 gas pressure value whether less than the
Two setting values, if so, carrying out step S3；
Pre- fuel gas pipeline 23 detects: whether detecting the gas pressure value of pre- fuel gas pipeline 23 less than the in the second setting time
Three setting values, if so, carrying out step S4；
If 22 testing result of main combustible pipe road and 23 testing result of pre- fuel gas pipeline be it is no, carry out step S5；
S3: alarm main combustible pipe road 22 leaks, No starting engine；
S4: pre- fuel gas pipeline 23 of alarming leaks, No starting engine；
S5: starting engine.
Wherein, as shown in figure 5, being realized before the starting of gas engine through the above steps, pass through inert gas
To the leak detection on main combustible pipe road to carry out leakage alarm in the case of a leak depositing, in the good situation of leakproofness into
The leak detection of the pre- fuel gas pipeline of row.
In one embodiment, the detection method is further comprising the steps of:
It detects on main combustible pipe road 22 further include: stop inert gas and be passed through, detect main combustible pipe road in third setting time
Whether 22 gas pressure value is less than the 4th setting value, if so, carrying out step S3；
Pre- fuel gas pipeline 23 detects further include: stops inert gas and is passed through, detects pre- fuel gas pipeline in the 4th setting time
Whether 23 gas pressure value is less than the 5th setting value, if so, carrying out step S4.
In one embodiment, before inert gas to be each led into main combustible pipe road 22 and pre- fuel gas pipeline 23, inspection
Inert gas source pressure is surveyed whether in the first range of set value, if so, step S2 is carried out, if it is not, then giving inert gas source
Topping up, until carrying out step S2 after pressure is in the second range of set value.
As illustrated in figs. 2-7, leakage detection method, including main combustion are carried out to pipeline with nitrogen before a kind of gas engine starting
23 leak detection process of 22 leak detection process of air pipe and pre- fuel gas pipeline.
A. starting order is received；
B. pressure of source nitrogen is detected, confirms it in range of set value；
C. main combustible pipe road 22 is detected
C1. the second pressure regulator valve 17 and the first solenoid valve 12 are closed, C2. opens intake solenoid valve 18 and the first pressure regulator valve 8, nitrogen
Gas enters main combustible pipe road 22；
C2. the gas pressure value P in main combustible pipe road 22 is detectedMIf: in setting time TM1It is interior, PMLower than setting value
PM1, then E is entered step；Otherwise enter next step；
C3. the first pressure regulator valve 8 is closed；
C4 continues to test the gas pressure value P in main combustible pipe road 22MIf: in setting time TM2It is interior, PMLower than setting
Value PM2, then E is entered step；Into next step；
C5. the first solenoid valve 12 is opened；
D. pre- fuel gas pipeline 23 is detected
D1. second solenoid valve 13 is closed, the second pressure regulator valve 17 is opened, nitrogen enters pre- fuel gas pipeline 23；
D2. the gas pressure value P in pre- fuel gas pipeline 23 is detectedPIf: T within the set timeP1It is interior, PPLower than setting value
PP1, then F is entered step；Otherwise enter next step；
D3. the second pressure regulator valve 17 and intake solenoid valve 18 are closed；
D4 continues to test the gas pressure value P in pre- fuel gas pipeline 23PIf: in the time T of settingP2It is interior, PPLess than setting
Definite value PP2, then F is entered step；Into next step；
D5. second solenoid valve 13 is opened, subsequently into step G；
E. alarm main combustible pipe road 22 leaks, and does not enter engine start；
F. pre- fuel gas pipeline 23 of alarming leaks, and does not enter engine start；
G. enter engine start.
Wherein, as shown in figure 5, being realized before the starting of gas engine through the above steps, pass through inert gas
To the leak detection of pre- fuel gas pipeline to carry out leakage alarm in the case of a leak depositing, opened in the good situation of leakproofness
Dynamic engine.As seen in figs, the comparison procedure of gas pressure value in main combustible pipe road is described in detail, passes through the second pressure regulation
The mutual cooperation of valve 17, the first solenoid valve 12, intake solenoid valve 18 and the first pressure regulator valve 8 realize inert gas it is logical close and
The control of intake.After the certain time after inert gas is passed through certain time and the first pressure regulator valve 8 is closed
In main combustible pipe road 22 twice pressure value relatively accurately react main combustible pipe road 22 leakage situation.As shown in Figure 3 and 7,
The comparison procedure of gas pressure value in pre- fuel gas pipeline is described in detail, passes through second solenoid valve 13, the first pressure regulator valve 8, air inlet
The mutual cooperation of solenoid valve 18 and the second pressure regulator valve 17 realizes that the logical of inert gas closes and the control of intake.By lazy
Property gas be passed through the pre- combustion gas after certain time and the second pressure regulator valve 17 and intake solenoid valve 18 are closed after certain time
The leakage situation for relatively accurately reacting pre- fuel gas pipeline 23 of pressure value twice in pipeline 23.
From above-described embodiment as can be seen that a kind of gas engine provided in an embodiment of the present invention and its leak detection side
Method, including 23 leak detection process of 22 leak detection process of main combustible pipe road and pre- fuel gas pipeline:
(1) by introducing inert gas such as nitrogen, and pass through pressure regulator valve, pressure sensor and exhaust solenoid valve
It cooperates, realizes before gas engine starts every time, to the sealing propertytest of fuel gas pipeline system, change existing skill
Detection in art fuel gas pipeline just must can be carried out and existing safety in the case where having occurred and that leakage after the engine started
Risk, to improve the safety of gas engine；
(2) it during 22 leak detection process of main combustible pipe road and pre- 23 leak detection of fuel gas pipeline, is beaten in pressure regulator valve
It opens certain time and closes in the case of two kinds of certain time, measure the pressure value in pre- fuel gas pipeline of advocating peace and be compared with true
It is fixed whether to have gas leakage, improve the accuracy of measurement.
It is important to note that each in each embodiment of the gas pipeline leakage detection method of above-mentioned body engine
A step can be intersected, replaces, increases, be deleted, therefore, these reasonable permutation and combination transformation in body engine
Gas pipeline leakage detection method should also be as belonging to the scope of protection of the present invention, and should not limit to protection scope of the present invention
On the embodiment.
It is exemplary embodiment disclosed by the invention above, the disclosed sequence of the embodiments of the present invention is just to retouching
It states, does not represent the advantages or disadvantages of the embodiments.It should be noted that the discussion of any of the above embodiment is exemplary only, it is not intended that
Imply that range disclosed by the embodiments of the present invention (including claim) is limited to these examples, what is limited without departing substantially from claim
Under the premise of range, it may be many modifications and modify.According to the claim to a method of open embodiment described herein
Function, step and/or movement are not required to the execution of any particular order.In addition, although element disclosed by the embodiments of the present invention can be with
It is described or is required in the form of individual, but be unless explicitly limited odd number, it is understood that be multiple.
It should be understood by those ordinary skilled in the art that: the discussion of any of the above embodiment is exemplary only, not
It is intended to imply that range disclosed by the embodiments of the present invention (including claim) is limited to these examples；In the think of of the embodiment of the present invention
Under road, it can also be combined between the technical characteristic in above embodiments or different embodiments, and exist as described above
Many other variations of the different aspect of the embodiment of the present invention, for simplicity, they are not provided in details.Therefore, all at this
Within the spirit and principle of inventive embodiments, any omission, modification, equivalent replacement, improvement for being made etc. should all be included in this hair
Within the protection scope of bright embodiment.
Claims (10)
1. a kind of gas engine characterized by comprising
Fuel gas pipeline, the inlet end of the fuel gas pipeline are provided with pressure regulator valve, and the exhaust outlet of the fuel gas pipeline is provided with exhaust
Solenoid valve is provided with pressure sensor on the fuel gas pipeline；
Inert gas source, the inert gas source connect the pressure regulator valve by intake solenoid valve.
2. gas engine according to claim 1, which is characterized in that further include interlocking valve group, the pressure regulator valve passes through
It interlocks valve group and connects fuel gas source, also, the inert gas source between the interlocking valve group and the pressure regulator valve by accessing.
3. gas engine according to claim 2, which is characterized in that the fuel gas pipeline includes main combustible pipe road (22)
With pre- fuel gas pipeline (23), wherein
In the main combustible pipe road (22), the inlet end in the main combustible pipe road (22), the first pressure is arranged in the first pressure regulator valve (8)
Force snesor (9) is arranged on the main combustible pipe road (22), and the first solenoid valve (12) is arranged in the main combustible pipe road (22)
Exhaust end；
In the pre- fuel gas pipeline (23), the second pressure regulator valve (17) be arranged the pre- fuel gas pipeline (23) inlet end, second
Pressure sensor (16) is arranged on the pre- fuel gas pipeline (23), and second solenoid valve (13) is arranged in the pre- fuel gas pipeline
(23) exhaust end；
First pressure regulator valve (8) and second pressure regulator valve (17) are connected in parallel the interlocking valve group.
4. gas engine according to claim 3, which is characterized in that first pressure regulator valve (8) and described second is adjusted
Pressure valve (17) is connected in parallel the intake solenoid valve (18).
5. gas engine according to claim 4, which is characterized in that the inert gas source and the intake solenoid valve
(18) shut-off valve (21), filter (20) and the 4th pressure sensor (19) are disposed between.
6. gas engine according to claim 2, which is characterized in that the interlocking valve group includes a two position three-way valve
(6) and a two position two-way valve (7).
7. a kind of leakage detection method of gas engine, which comprises the following steps:
Inert gas is passed through in fuel gas pipeline before gas engine starting, whether detection fuel gas pipeline leaks,
If so, alarm leakage, No starting gas engine,
If it is not, then starting gas engine.
8. the method according to the description of claim 7 is characterized in that whether the detection fuel gas pipeline leaks and includes:
S1: the enabled instruction of engine is received；
S2: each leading into main combustible pipe road (22) and pre- fuel gas pipeline (23) for inert gas,
Main combustible pipe road (22) detection: the first setting time detection main combustible pipe road (22) gas pressure value whether less than the
Two setting values, if so, carrying out step S3；
The detection of pre- fuel gas pipeline (23): whether the gas pressure value of pre- fuel gas pipeline (23) is detected less than the in the second setting time
Three setting values, if so, carrying out step S4；
If main combustible pipe road (22) testing result and pre- fuel gas pipeline (23) testing result be it is no, carry out step S5；
S3: main combustible pipe road (22) leakage of alarming, No starting engine；
S4: alarm pre- fuel gas pipeline (23) leakage, No starting engine；
S5: starting engine.
9. according to the method described in claim 8, it is characterized in that,
Main combustible pipe road (22) detection further include: stop inert gas and be passed through, detect main combustible pipe in third setting time
Whether the gas pressure value on road (22) is less than the 4th setting value, if so, carrying out step S3；
Pre- fuel gas pipeline (23) detection further include: stop inert gas and be passed through, detect pre- fuel gas conduit in the 4th setting time
Whether the gas pressure value on road (23) is less than the 5th setting value, if so, carrying out step S4.
10. according to the method described in claim 8, it is characterized in that, inert gas is each led into main combustible pipe road (22)
Before pre- fuel gas pipeline (23), inert gas source pressure is detected whether in the first range of set value, if so, carrying out step
S2, if it is not, inert gas source topping up is then given, until carrying out step S2 after pressure is in the second range of set value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910492338.6A CN110173376A (en) | 2019-06-06 | 2019-06-06 | A kind of gas engine and its leakage detection method |
Applications Claiming Priority (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114636523A (en) * | 2022-05-17 | 2022-06-17 | 浙江大学 | Carrier gas bin testing device for hydrogen conveying pipeline |
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