CN209416606U - A kind of gas machine air leakage detection system - Google Patents
A kind of gas machine air leakage detection system Download PDFInfo
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- CN209416606U CN209416606U CN201920350624.4U CN201920350624U CN209416606U CN 209416606 U CN209416606 U CN 209416606U CN 201920350624 U CN201920350624 U CN 201920350624U CN 209416606 U CN209416606 U CN 209416606U
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- detection system
- air leakage
- inner tube
- fuel gas
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Abstract
The utility model belongs to gas machine technical field, discloses a kind of gas machine air leakage detection system.The gas machine air leakage detection system includes: fuel gas pipeline, and fuel gas pipeline includes the inner and outer tubes of coaxial arrangement, forms annular chamber between inner and outer tubes, one end of inner tube is selectively passed through combustion gas, and inner tube is respectively communicated in the cylinder cap of multiple gas machines；First testing agency, the first testing agency include air engine and detection piece, and air engine is selectively connected to one end of inner tube, and detection piece is removably connected to cylinder cap and can extend into annular chamber；Second testing agency, one end are connected to annular chamber, and the other end is configured as the gas extraction in annular chamber and discharge.For the gas machine air leakage detection system when being passed through compressed air to inner tube, whether detection there is air leakage on cylinder cap, and the leakage position for facilitating locking general guarantees integrally-built leakproofness, to improve security performance for detecting the air-tightness of fuel gas pipeline.
Description
Technical field
The utility model relates to gas machine technical field more particularly to a kind of gas machine air leakage detection systems.
Background technique
For some marine engines using natural gas as fuel, fuel gas pipeline is used to convey natural gas to marine engine.
Since fuel gas pipeline can generate oxidation, aging in use for a long time, so that fuel gas pipeline is cracked, cause gas leakage and occur
It is dangerous.
Existing fuel gas pipeline uses double-layer tube wall structure, is used for duplicate protection, can reduce leakage to a certain extent
Combustion gas be diffused into atmosphere.But due to lacking the leakage monitoring device to fuel gas pipeline, and operator cannot without when without
Quarter can be monitored fuel gas pipeline, once gas leakage occurs, gently then occur poisoning, heavy then explode, and exist
Security risk endangers health of human body safety.
Utility model content
The purpose of this utility model is to provide a kind of gas machine air leakage detection systems to guarantee for detecting gas leakage
Integrally-built leakproofness, to improve security performance.
For this purpose, the utility model uses following technical scheme:
A kind of gas machine air leakage detection system, comprising:
Fuel gas pipeline, the fuel gas pipeline includes the inner and outer tubes of coaxial arrangement, between said inner tube and the outer tube
Annular chamber is formed, one end of said inner tube is selectively passed through combustion gas, and said inner tube is respectively communicated in the cylinder cap of multiple gas machines；
First testing agency, first testing agency include air engine and detection piece, and the air engine is selectively connected to
In said inner tube, for being passed through compressed air to one end of said inner tube, the detection piece is removably connected to the cylinder cap simultaneously
It can extend into the annular chamber；
Second testing agency, one end are connected to the annular chamber, and the other end is configured as the gas in the annular chamber
Body is extracted and is discharged, for detecting gas leakage.
Preferably, the detection piece is screw, the screw thread worn for the detection piece is provided on the cylinder cap
Hole.
Preferably, second testing agency include exhaust pipe and pumping fan assembly, the one of the exhaust pipe
End is connected to the annular chamber, and the other end is connected to the pumping fan assembly.
Preferably, the pumping fan assembly includes the primary pumping wind parallel with one another being set on the exhaust pipe
Machine and spare pumping blower.
Preferably, the pumping fan assembly further includes the differential pressure pickup being set on the exhaust pipe, it is described
Differential pressure pickup and the primary pumping fan parallel-connection are arranged, between the inlet and outlet for detecting the primary pumping blower
Pressure difference.
Preferably, second testing agency further includes the gas security being arranged on the exhaust pipe, it is described
Gas security is used to detect the combustion gas of leakage.
Preferably, second testing agency further includes the expansion box being arranged on the exhaust pipe, the combustion gas
Sensor is set on the expansion box.
Preferably, the side on the cylinder cap close to the fuel gas pipeline is provided with attachment base, the attachment base is used for
It is connected to the fuel gas pipeline, the threaded hole is set on the attachment base.
Preferably, fuel gas injection valve is additionally provided on the attachment base, for controlling the fuel gas pipeline to the cylinder
Lid is passed through the opening and closing of combustion gas.
Preferably, the quantity of the fuel gas pipeline be it is multiple, pass through bellows between the two neighboring fuel gas pipeline
It is connected.
The utility model has the beneficial effects that
The utility model provides a kind of gas machine air leakage detection system, when gas machine is in normal operation, detection
Part is connected on cylinder cap and protrudes into annular chamber, so that detection piece, cylinder cap and fuel gas pipeline form complete enclosed construction, inside
One end of pipe is passed through combustion gas, and inner tube is respectively communicated in the cylinder cap of multiple gas machines, enables and endlessly leads to combustion gas
Enter in gas machine.At this point, in combustion gas meeting overflow to annular chamber, passing through setting second if the inner tube of fuel gas pipeline is damaged
The combustion gas of leakage is discharged the gas extraction in annular chamber and discharge by testing agency in time.
When gas machine long-time be not used or booting before, when needing to fuel gas pipeline leak check, will test part
It is detached from and dismantles from cylinder cap, be connected to air engine in one end of inner tube, the compression for being passed through left and right to one end of inner tube is empty
Gas is detected at this time for whether there is air leakage at the position of connecting detection part on cylinder cap, if one of cylinder cap exists
Gas leakage is serious at the position, remaining cylinder cap gas leakage very little at this location then shows the somewhere fuel gas conduit before this cylinder cap
There is leakage in road, facilitates and locks general leakage position, for detecting the air-tightness of fuel gas pipeline, guarantees integrally-built close
Feng Xing, to improve security performance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model gas machine air leakage detection system.
In figure:
1, fuel gas pipeline；2, the first testing agency；3, the second testing agency；4, cylinder cap；5, fuel gas injection valve；6, ripple
Pipe；
11, inner tube；12, outer tube；
21, detection piece；
31, exhaust pipe；32, it is evacuated fan assembly；33, differential pressure pickup；34, gas security；35, expansion box；
321, primary pumping blower；322, spare pumping blower
41, attachment base.
Specific embodiment
The technical issues of to solve the utility model, the technical solution of use and the technical effect that reaches are clearer,
It is described in further detail below in conjunction with technical solution of the attached drawing to the utility model embodiment, it is clear that described reality
Applying example is only the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention,
It is practical new to belong to this for those skilled in the art's every other embodiment obtained without creative efforts
The range of type protection.
In the description of the present invention, unless otherwise clearly defined and limited, term " connected ", " connection ", " Gu
It is fixed " it shall be understood in a broad sense, for example, it may be being fixedly connected, it may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.For the ordinary skill in the art, it can be managed with concrete condition
Solve the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it
"lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to
Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above "
One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special
Sign is directly below and diagonally below the second feature including fisrt feature under the second feature " below ", " below " and " below ", or only
Indicate that first feature horizontal height is less than second feature.
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
A kind of gas machine air leakage detection system is present embodiments provided, for providing natural gas as fuel for gas machine
Meanwhile and detected to whether natural gas is revealed, wherein gas machine is specially marine engine.As shown in Figure 1, the gas machine
Air leakage detection system includes: fuel gas pipeline 1, the first testing agency 2 and the second testing agency 3, and fuel gas pipeline 1 is used to be gas machine
Combustion gas is provided, fuel gas pipeline 1 includes the inner tube 11 and outer tube 12 of coaxial arrangement, it is combined between the two using welding procedure, and
Annular chamber, the i.e. middle layer of double-wall pipe are formed between inner tube 11 and outer tube 12, one end of inner tube 11 is selectively passed through combustion gas, and interior
Pipe 11 is respectively communicated with the cylinder cap 4 in multiple gas machines.Wherein gas machine particular number is six, for the convenience of description, intermediate save
Slightly four gas machines only show two gas machines, are located at most upstream and most downstream.
Combustion gas refers generally to natural gas, and ingredient is methane, if combustion gas leakage meeting overflow occurs into atmosphere, pollutes environment,
And it is easy to appear the dangerous situation of poisoning or explosion, in order to carry out air-leakage test, the first testing agency 2 to fuel gas pipeline 1
Including air engine (not shown) and detection piece 21, air engine is selectively connected to one end of inner tube 11, is used for inner tube 11
One end be passed through compressed air, detection piece 21 is removably connected to cylinder cap 4 and can extend into annular chamber, and detection piece 21 is for examining
Survey the air-tightness of fuel gas pipeline 1.One end of second testing agency 3 is connected to annular chamber, and the other end is configured as will be in annular chamber
Gas extraction and discharge, when gas machine work run when, can be by persistently being extracted to annular chamber, will be in annular chamber
Gas extraction discharged into atmosphere, for detecting gas leakage.
A kind of gas machine air leakage detection system is present embodiments provided, when gas machine is in normal operation, detection piece
21 are connected on cylinder cap 4 and protrude into annular chamber, so that detection piece 21, cylinder cap 4 and fuel gas pipeline 1 form complete closing knot
Structure is passed through combustion gas in one end of inner tube 11, and inner tube 11 is respectively communicated with the cylinder cap 4 in multiple gas machines, enables combustion gas source
Source is constantly passed through in gas machine.At this point, if the inner tube 11 of fuel gas pipeline 1 is damaged, in combustion gas meeting overflow to annular chamber,
The gas extraction in annular chamber and discharge are discharged the combustion gas of leakage in time by the second testing agency 3 of setting.
When gas machine long-time be not used or booting before, when needing to 1 leak check of fuel gas pipeline, will test part
21 are detached from and dismantle from cylinder cap 4, air engine are connected in one end of inner tube 11, for being passed through the pressure of 4bar or so to inner tube 11
Contracting air is detected at this time for whether there is air leakage at the position of connecting detection part 21 on cylinder cap 4, if one of them
Gas leakage is serious at this location for cylinder cap 4, remaining cylinder cap 4 gas leakage very little at this location then shows certain before this cylinder cap 4
There is leakage in place's fuel gas pipeline 1, facilitates and locks general leakage position, for detecting the air-tightness of fuel gas pipeline 1, guarantees whole
The leakproofness of body structure, to improve security performance.
Above-mentioned fuel gas pipeline 1 adopts a split structure, and is easily installed, dismantles and replaces, specifically, the number of fuel gas pipeline 1
It is multiple for measuring, and since each fuel gas pipeline 1 can have foozle, brings great difficulty to installation, therefore, two neighboring combustion
Be connected between air pipe 1 by bellows 6, bellows 6 using metal material hose, can plastic deformation, for mending
Repay the manufacture installation error of two neighboring fuel gas pipeline 1.
It is connected for the ease of cylinder cap 4 with fuel gas pipeline 1, the side on cylinder cap 4 close to fuel gas pipeline 1 is provided with attachment base
41, attachment base 41 is for being connected to fuel gas pipeline 1.Optionally, fuel gas injection valve 5 is provided on attachment base 41, for controlling combustion
Air pipe 1 is passed through the opening and closing of combustion gas to cylinder cap 4.
Specifically, above-mentioned detection piece 21 can be screw, specially M5 screw, be provided with spiral shell on the attachment base 41 of cylinder cap 4
Pit, threaded hole are specially M5 threaded hole, and threaded hole is worn for detection piece 21, are realized between detection piece 21 and cylinder cap 4
It is detachably connected.
As shown in Figure 1, in order to extract gas, above-mentioned second detection in the annular chamber between inner tube 11 and outer tube 12
Mechanism 3 includes exhaust pipe 31 and pumping fan assembly 32, and one end of exhaust pipe 31 is connected to annular chamber, and the other end is communicated with
It is evacuated fan assembly 32.Optionally, pumping fan assembly 32 includes primary pumping blower 321, spare pumping blower 322 and pressure difference
Sensor 33, primary pumping blower 321 and spare pumping blower 322 is parallel with one another is set on exhaust pipe 31, when primary pumping
When gas blower 321 breaks down, it can use spare pumping blower 322 and work, optionally, prevent from extracting workpiece
Interruption and influence gas discharge effect.
In order to judge whether primary pumping blower 321 breaks down in time, pressure difference is set on exhaust pipe 31 and is passed
Sensor 33, differential pressure pickup 33 can be pressure switch etc., and differential pressure pickup 33 is arranged in parallel with primary pumping blower 321, is used
Pressure difference between the inlet and outlet for detecting primary pumping blower 321.Primary pumping wind is detected by differential pressure pickup 33
The fan inlet outlet pressure differential of machine 321 then illustrates that the fan of primary pumping blower 321 breaks down, at this time when the pressure difference is zero
It needs to be switched to spare pumping blower 322 to work, so that whole system works normally.
As shown in Figure 1, there is the combustion gas of leakage in the exhaust pipe 31, it is desirable to it can detecte at the first time and early warning,
Relevant treatment operations are carried out in time convenient for operator, and the second testing agency 3 further includes expansion box 35 and gas security thus
34, expansion box 35 is arranged on exhaust pipe 31 and is located between fuel gas pipeline 1 and pumping fan assembly 32, gas security 34
It is set on expansion box 35, for detecting the combustion gas of leakage.Gas security 34 is specially methane detector.
By the way that an expansion box 35 is arranged at the fan inlet of primary pumping blower 321, and a combustion gas sensing is installed
Device 34, for storing certain gas, can reduce the gas flow rate of extraction, pass combustion gas since 35 volume of expansion box is larger
The detection of sensor 34 is more accurate.When the combustion gas letter that fuel gas pipeline 1 has any leakage, and gas security 34 can will test
The control system being electrically connected with it number is passed to, control system control alarm is alarmed.
The course of work of gas machine air leakage detection system provided in this embodiment is as follows:
When gas machine is in normal operation, detection piece 21 is connected on the attachment base 41 of cylinder cap 4 and protrudes into annular chamber
It is interior, it is passed through combustion gas in one end of inner tube 11, the other end is respectively communicated with the cylinder cap 4 in multiple gas machines, enables combustion gas source
Source is constantly passed through in gas machine.If the inner tube 11 of fuel gas pipeline 1 is damaged, in combustion gas meeting overflow to annular chamber, pass through
Primary pumping blower 321 is arranged the combustion gas of leakage is discharged the gas extraction in annular chamber and discharge in time.It is logical
Over-voltage gap sensor 33 then illustrates primary to detect the fan inlet outlet pressure differential of primary pumping blower 321 when the pressure difference is zero
The fan for being evacuated blower 321 breaks down, and needs to be switched to spare pumping blower 322 at this time and works, so that whole system
It works normally.
When gas machine long-time be not used or booting before, when needing to 1 leak check of fuel gas pipeline, will test part
21 are detached from and dismantle from cylinder cap 4, air engine are connected in one end of inner tube 11, for being passed through the pressure of 4bar or so to inner tube 11
Contracting air, whether the threaded hole detected at this time in cylinder cap 4 there is air leakage, if the threaded hole gas leakage of one of cylinder cap 4
Seriously, the threaded hole gas leakage very little of remaining cylinder cap 4 then shows that letting out occurs in the somewhere fuel gas pipeline 1 before this cylinder cap 4
Dew, to lock general leakage position.
In the description of this article, it is to be understood that term " on ", "lower", " right side ", etc. orientation or positional relationships be based on
Orientation or positional relationship shown in the drawings is merely for convenience of description and simplification and operates, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model
Limitation.In addition, term " first ", " second ", are only used to distinguish between description, have no special meaning.
In the description of this specification, the description of reference term " embodiment ", " example " etc. means to combine the embodiment
Or example particular features, structures, materials, or characteristics described are contained at least one embodiment or example of the utility model
In.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
In addition, above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, is able to carry out for a person skilled in the art various bright
Aobvious variation, readjustment and substitution is without departing from the protection scope of the utility model.Therefore, although passing through above embodiments
The utility model is described in further detail, but the utility model is not limited only to above embodiments, is not departing from
It can also include more other equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended
Scope of the claims determine.
Claims (10)
1. a kind of gas machine air leakage detection system characterized by comprising
Fuel gas pipeline (1), the fuel gas pipeline (1) include the inner tube (11) and outer tube (12) of coaxial arrangement, said inner tube (11)
Annular chamber is formed between the outer tube (12), one end of said inner tube (11) is selectively passed through combustion gas, and said inner tube (11)
It is respectively communicated with the cylinder cap (4) in multiple gas machines；
First testing agency (2), first testing agency (2) include air engine and detection piece (21), the air engine selection
Property be connected to said inner tube (11), for one end of said inner tube (11) being passed through compressed air, the detection piece (21) is removable
It unloads and is connected to the cylinder cap (4) and can extend into the annular chamber；
Second testing agency (3), one end are connected to the annular chamber, and the other end is configured as the gas in the annular chamber
It extracts and is discharged, for detecting gas leakage.
2. gas machine air leakage detection system according to claim 1, which is characterized in that the detection piece (21) is screw,
The threaded hole worn for the detection piece (21) is provided on the cylinder cap (4).
3. gas machine air leakage detection system according to claim 1, which is characterized in that the second testing agency (3) packet
Exhaust pipe (31) and pumping fan assembly (32) are included, one end of the exhaust pipe (31) is connected to the annular chamber, another
End is connected to the pumping fan assembly (32).
4. gas machine air leakage detection system according to claim 3, which is characterized in that pumping fan assembly (32) packet
Include the primary pumping blower (321) and spare pumping blower (322) parallel with one another being set on the exhaust pipe (31).
5. gas machine air leakage detection system according to claim 4, which is characterized in that the pumping fan assembly (32) is also
Including the differential pressure pickup (33) being set on the exhaust pipe (31), the differential pressure pickup (33) and the primary pumping
Blower (321) is arranged in parallel, the pressure difference between inlet and outlet for detecting primary pumping blower (321).
6. gas machine air leakage detection system according to claim 3, which is characterized in that second testing agency (3) is also
Including the gas security (34) being arranged on the exhaust pipe (31), the gas security (34) is used to detect leakage
Combustion gas.
7. gas machine air leakage detection system according to claim 6, which is characterized in that second testing agency (3) is also
Including the expansion box (35) being arranged on the exhaust pipe (31), the gas security (34) is set to the expansion box
(35) on.
8. gas machine air leakage detection system according to claim 2, which is characterized in that close to described on the cylinder cap (4)
The side of fuel gas pipeline (1) is provided with attachment base (41), and the attachment base (41) is described for being connected to the fuel gas pipeline (1)
Threaded hole is set on the attachment base (41).
9. gas machine air leakage detection system according to claim 8, which is characterized in that also set up on the attachment base (41)
There are fuel gas injection valve (5), the opening and closing for being passed through combustion gas for controlling the fuel gas pipeline (1) Xiang Suoshu cylinder cap (4).
10. gas machine air leakage detection system according to claim 1, which is characterized in that the quantity of the fuel gas pipeline (1)
To be multiple, it is connected between the two neighboring fuel gas pipeline (1) by bellows (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920350624.4U CN209416606U (en) | 2019-03-19 | 2019-03-19 | A kind of gas machine air leakage detection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920350624.4U CN209416606U (en) | 2019-03-19 | 2019-03-19 | A kind of gas machine air leakage detection system |
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| CN209416606U true CN209416606U (en) | 2019-09-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708818A (en) * | 2019-03-19 | 2019-05-03 | 中船动力研究院有限公司 | A kind of gas machine air leakage detection system |
| CN111947850A (en) * | 2020-09-17 | 2020-11-17 | 核工业西南物理研究院 | Double-layer-pipe helium leakage detection device with interlayer and method |
-
2019
- 2019-03-19 CN CN201920350624.4U patent/CN209416606U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708818A (en) * | 2019-03-19 | 2019-05-03 | 中船动力研究院有限公司 | A kind of gas machine air leakage detection system |
| CN111947850A (en) * | 2020-09-17 | 2020-11-17 | 核工业西南物理研究院 | Double-layer-pipe helium leakage detection device with interlayer and method |
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