CN207245906U - Diesel fuel system leak detecting device - Google Patents
Diesel fuel system leak detecting device Download PDFInfo
- Publication number
- CN207245906U CN207245906U CN201721121834.3U CN201721121834U CN207245906U CN 207245906 U CN207245906 U CN 207245906U CN 201721121834 U CN201721121834 U CN 201721121834U CN 207245906 U CN207245906 U CN 207245906U
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- oil
- hydraulic device
- manual hydraulic
- pressure
- fuel
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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
- Y02T10/40—Engine management systems
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Abstract
The utility model provides diesel fuel system leak detecting device, including manual hydraulic device, high-pressure oil pipe, high pressure connection, crossover sub and diesel engine oil return manifold；It is characterized in that：It is characterized in that：The oil return pipe of each fuel injector of diesel engine is connected to return flow oil manifold by pipeline；Manual hydraulic device is fixed on diesel oil machine base, and manual hydraulic device is connected on return flow oil manifold by high pressure connection, high-pressure oil pipe, crossover sub；High pressure connection is the fuel discharge port of manual hydraulic device, for connecting high-pressure oil pipe；Crossover sub is used to high-pressure oil pipe from the return flow oil manifold of different connector models being connected；Manual hydraulic device is used to pump out working media oil, reversely to be pressed to return flow oil manifold；The present apparatus is safe, and trouble hunting can be carried out in the case where not starting diesel engine；Fuel leakage trouble point can be accurately found out, can be widely applied to the industries such as oil, chemical industry, automobile, electric power.
Description
Technical field
It the utility model is related to diesel fuel system, and in particular to diesel fuel system leak detecting device.
Background technology
In diesel engine operation process, if fuel system leaks diesel oil, oil sump machine oil can cause diesel engine after being diluted
The generation of bearing shell burning damage accident, causes damage or the equipment scrapping accident of crankshaft of diesel engine, or causes low oil pressure automatic stopping to be protected
Protection unit acts, and forces diesel engine auto extinguishing to stop, causes serious production safety hidden danger or traffic safety hidden danger.
In diesel fuel system, since every fuel injector will pass through the injection pressure detection of 20Mpa or so and adjust
School, which could be fitted into cylinder, to be used, so, the high-pressure section of fuel injector usually all has higher leakproofness, will not generally leak
Diesel oil, fuel system leak the oil return piping for occurring mainly in fuel injector.Since unified remittance bavin is in charge of in each cylinder injector oil return
Fuel tank is flowed back to after oil machine oil return manifold, so, the pipeline of diesel engine way to cycle oil is more, connector is more, seal is more, these are located at gas
It is not easy to be found when pipeline, connector in cylinder cover enclosure, seal leakage diesel oil.Especially it is mounted to oil sprayer protective cover, oil spout
Fuel injector component inside device pressing sleeve and injector plate this 3 cover parts, due to foregoing cover parts block and cylinder
The lubricating oil to splash in lid is attached on these component surfaces, so, from diesel engine invention so far, also without any work
Tool and effective method come observe, judge fuel injector regulator bolts simultaneously cap, oil return helmet, these positions of nozzle cap nut whether
To External leakage diesel oil.
Certain drilling crew just occurred to cause with axis out of plumb when diesel injector oil return helmet sealing surface produces and processes
Cause the regular low oil pressure auto extinguishing failure of diesel engine after poorly sealed leakage diesel fuel dilution machine oil.Each road expert of factory
From 2007 to 2015,8 years are lasted, the fuel system upkeep operation and 3 of more than 10 times has successively been carried out for this diesel engine
Secondary cylinder sleeve piston special project replacement operation fails to find out the failure cause for causing diesel engine auto extinguishing, for enterprise cause compared with
Big economic loss, causes larger society's negative effect.
Utility model content
The technical problem to be solved by the utility model is to provide diesel fuel system leak detecting device.
To solve the above-mentioned problems, technical solution according to the present utility model, diesel fuel system leak detecting device,
Including manual hydraulic device, high-pressure oil pipe, high pressure connection, crossover sub and diesel engine oil return manifold；It is characterized in that：Diesel engine
The oil return pipe of each fuel injector is connected to return flow oil manifold by pipeline；Manual hydraulic device is fixed on diesel oil machine base
On, manual hydraulic device is connected on return flow oil manifold by high pressure connection, high-pressure oil pipe, crossover sub；High pressure connection is
The fuel discharge port of manual hydraulic device, for connecting high-pressure oil pipe；Crossover sub is used for high-pressure oil pipe and different joint-types
Number return flow oil manifold be connected；Manual hydraulic device is used to pump out working media oil, anti-to be carried out to return flow oil manifold
To pressure；Pressure gauge is installed, pressure gauge shows pressure value on manual hydraulic device.
The utility model one is that solve not had any effective tool and method to examine since diesel engine invention
Sealing, the leakage situation of fuel system are looked into, judged, is especially mounted to oil sprayer protective cover, fuel injector pressing sleeve and injector plate
Injector assembly inside these three cover parts whether to External leakage diesel fuel dilution lubricating oil problem；Second, the present apparatus is pacified
Quan Xinggao, can carry out trouble hunting in the case where not starting diesel engine, ensure operator from noise injury and machinery wound
Evil；Third, the present apparatus is easy to operate, device detects diesel fuel system leakproofness by the change of pressure gauge indicating value, operation
Person need not possess too many professional skill also can complete independently failure lookup operation；Fourth, diesel fuel system is leaked
Trouble shooting effective percentage 100%, it is high to trouble point accuracy of detection；Fifth, detection efficiency height；Sixth, the present apparatus is widely used, can
Pressure on diesel engine after all system sealing performance detections and cylinder head lubricating stopping up of oil channel with seal request
Dredge, available for various safety valves, the Opening pressure Task of Debugging of pressure limiting valve.The present apparatus is a kind of peace in engine maintenance field
Entirely, it is widely used, powerful that is time saving, laborsaving, saving maintenance cost.
According to the preferred solution of diesel fuel system leak detecting device described in the utility model, manual hydraulic device
Including mounting base, oil drum, three-way connection, fuel feed pump plunger pressure handle and fuel feed pump plunger；The tail end of mounting base is provided with fuel feed pump plunger
Set, fuel feed pump plunger are arranged in plunger piston sleeve of oil pump；The bottom of fuel feed pump plunger sets plunger return spring；Set at the top of fuel feed pump plunger
Fuel feed pump plunger pressure handle is put, fuel feed pump plunger pressure handle is fixed in mounting base by hinge and joint pin；The oil pocket of fuel feed pump plunger and oil
Road connects, and oil duct is oil inlet and oil extraction shared track；The oil inlet and oil discharge outlet of oil duct set inlet valve and draining valve, oil inlet respectively
Valve is also connected with oil drum；When fuel feed pump plunger moves up and down, oil inlet and oil extraction are realized using the opening and closing of inlet valve and draining valve,
And prevent hydraulic oil from flowing back to oil drum；The tail end of oil duct is blocked by technique plug；Oil drum is fixed in mounting base, oil drum
High pressure center pipe is inside provided with, the lower end of high pressure center pipe is plugged in oil extraction valve base, and the upper end of high pressure center pipe is plugged on
In upper seal head, upper seal head is connected with three-way connection input terminal；The three-way connection is arranged on pumping out for manual hydraulic device
End, the second output terminal of three-way connection are connected with pressure gauge, the first output terminal connection high pressure connection of three-way connection.
According to the preferred solution of diesel fuel system leak detecting device described in the utility model, oil extraction valve base and
Closure gasket groove is both provided with upper seal head, sealing ring is installed in closure gasket groove, high pressure center pipe top and bottom are by close
Seal seals.
The beneficial effect of diesel fuel system leak detecting device described in the utility model is：Present apparatus security
Height, can carry out trouble hunting in the case where not starting diesel engine；It is easy to operate, device by the change of pressure gauge indicating value come
Diesel fuel system leakproofness is detected, it is efficient, fuel leakage trouble point can be accurately found out, there is safe, time saving, province
Power, save the features such as maintenance cost, can be widely used for oil, chemical industry, electric power, ship, automobile and other industries.
Brief description of the drawings
Fig. 1 is the structure diagram of diesel fuel system leak detecting device described in the utility model.
Fig. 2 is manual hydraulic device structure diagram described in the utility model.
Embodiment
Referring to Fig. 1 and Fig. 2, diesel fuel system leak detecting device, including manual hydraulic device, high-pressure oil pipe 18,
High pressure connection 17, crossover sub 16 and diesel engine oil return manifold 39；The each fuel injector of diesel engine respectively passes through back leakage connection and oil return
Pipe connects；Oil return pipe accesses oil return collecting pipe 47 by oil return threeway 43 or oil return elbow 48；Oil return collecting pipe 47 passes through oil return
Manifold bent subs 42 are connected to return flow oil manifold 39；I.e. oil return elbow 48, oil return threeway 43 and oil return collecting pipe 47 are each
The oil return line of a fuel injector is converging together, by the commutation of oil return manifold bent subs 42, finally with return flow oil manifold 39
It is connected；Manual hydraulic device is fixed on diesel oil machine base 28, and manual hydraulic device passes through high pressure connection 17, high-pressure oil pipe
18th, crossover sub 16 is connected on return flow oil manifold 39；High pressure connection 17 is the fuel discharge port of manual hydraulic device 49, is used
In connection high-pressure oil pipe 18；Crossover sub 16 is used to high-pressure oil pipe 18 from the return flow oil manifold 39 of different connector models being connected
Connect, and bear high pressure and improve leakproofness.For screw thread button-type crossover sub；Manual hydraulic device 49 is used to pump out working media
Oil, reversely to be pressed to return flow oil manifold 39；Pressure gauge 15 is installed, pressure gauge 15 is shown on manual hydraulic device 49
Pressure value.Crossover sub 16 is the double public high pressure crossover subs of spherical seal surface.
Fuel injector is mainly by tight cap of oil nozzle 31, oil injector body 32, fuel injector regulator bolts locking back of the body cap lower seal pad 35, spray
Gasket 37, oil return of oil injector helmet 38, oil return in oily device regulator bolts locking back of the body cap 36, fuel injector regulator bolts locking back of the body cap
Joint sealing pad 40 and back leakage connection 41 are formed.Back leakage connection 41 connects oil return pipe 44.Fuel injector is by fuel injector pressing sleeve 34, oil spout
Device pressing plate 45 and injector plate fixing bolt 46 are fixed on inside oil sprayer protective cover 33, wherein the lower end of oil sprayer protective cover 33 with
Cylinder head is installed for interference fit, and top is by sealing ring sealing coolant.
In a particular embodiment, manual hydraulic device includes mounting base 29, oil drum 11, three-way connection 14, fuel feed pump plunger
Pressure handle 10 and fuel feed pump plunger 8；The tail end of mounting base 29 is provided with plunger piston sleeve of oil pump 6, and fuel feed pump plunger 8 is arranged on plunger piston sleeve of oil pump 6
It is interior；The bottom of fuel feed pump plunger 8 sets plunger return spring 2；The top of fuel feed pump plunger 8 sets fuel feed pump plunger pressure handle 10, oil pump column
Plug pressure handle 10 is fixed in mounting base by hinge 9 and joint pin 21；The oil pocket of fuel feed pump plunger is connected with oil duct 26, and oil duct 26 is
Oil inlet and oil extraction shared track, oil duct 26 also also serve as oil inlet and the drainback passage of plunger-type fuel pump；The oil inlet and oil discharge outlet of oil duct 26
Inlet valve and draining valve, inlet valve is set also to be connected with oil drum 11 respectively；Inlet valve is by oil inlet valve spring 3, oil inlet valve body
7th, inlet valve steel ball 5 and oil inlet valve base 4 are formed, and draining valve is by oil extraction valve base 22, oil extraction valve body 23, oil extraction valve spring 24
Formed with draining valve steel ball 25；Oil inlet valve base 4 and oil extraction valve base 22 are arranged in mounting base and under oil drums 11
Side；When fuel feed pump plunger moves up and down, oil inlet and oil extraction are realized using inlet valve and draining valve, and prevent hydraulic oil from flowing back to storage
Oily cylinder 11；The tail end of oil duct 26 is blocked by technique plug 1；Oil drum 11 is fixed in mounting base, and height is provided with oil drum 11
Central tube 20 is pressed, the lower end of high pressure center pipe 20 is plugged in oil extraction valve base 22, and the upper end of high pressure center pipe 20 is plugged on
In seal head 13, upper seal head 13 is connected with 14 input terminal of three-way connection；It is all provided with oil extraction valve base 22 and upper seal head 13
Be equipped with closure gasket groove, sealing ring be installed in closure gasket groove, 20 top and bottom of high pressure center pipe respectively by sealing ring 19a,
19b is sealed.Three-way connection 14 is arranged on the end that pumps out of manual hydraulic device, the second output terminal and the pressure gauge 15 of three-way connection 14
Connection, the first output terminal connection high pressure connection 17 of three-way connection 14.The top of oil drum 11 is provided with oil filler, by oil filler
Plug 12 blocks.Mounting base 29 is fixed on diesel oil machine base 28 by fixed bolt hole 27 and fixing bolt 30.
" pressure in closed container can be constant to each side by liquid size using Pascal's law for the utility model
To transmitting " principle carry out the inspection of diesel fuel system leakproofness, according to the voltage stabilizing state of pressure detecting system and from letting out
The diesel oil that leak source flows out carries out the lookup and positioning of leakage point with lubricating oil in the different recognition methods of color, viscosity,
Replacement is precisely repaired further according to the corresponding sealing device of leakage point progress for checking next.
The working media oil that the utility model is pumped out using manual hydraulic device 49 presses fuel oil return pipe to 5Mpa, root
Fuel system leakproofness is judged according to whether the pressure indicating value on 15 dial plate of pressure gauge can decline, according to checking from system leak
The location point of working media oil that pumps out of manual hydraulic device 49 accurate searched and positioning carry out leak source.
Specifically used method is as follows：
Firstth, the installation of diesel fuel system leak detecting device is carried out：
1. hand hydraulic tool 49 is fixed on diesel oil machine base 28 with fixing bolt 30.
2. pressure gauge 15 is installed on the second output terminal of the three-way connection 14 that manual hydraulic device 49 pumps out end.
3. high-pressure oil pipe 18 and hand hydraulic tool 49 are pumped out to the three-way connection 14 at end with spherical high-pressure connector 17
First output terminal connects.
4. high-pressure oil pipe 18 is connected with return flow oil manifold 39 with spherical seal surface double public high pressure crossover subs 16,
Secondth, the use of diesel fuel system leak detecting device is carried out：
1. the clean diesel oil for precipitating 72h or other liquid oils are poured into manual hydraulic device 49 at oiling plug 12
In oil drum 11.
2. press 10 pump oil of plunger pressure handle of manual hydraulic device 49, the hydraulic oil pair pumped out using manual hydraulic device 49
Diesel engine fuel oil oil return piping or oil inlet piping reversely press.
3. observing pressure gauge 15, stop pressing plunger pressure handle 10 after being forced into 5Mpa, as diesel engine fuel oil oil return piping is steady
10min no pressures are pressed to decline phenomenon, then the sealing of diesel engine fuel oil oil return system is intact.
4. observe pressure gauge 15, when return flow oil system can not voltage stabilizing, then diesel engine fuel oil oil return system have the leakage existing
As.With towel wiped clean oil return manifold bent subs 42, each oil return of oil injector pipe three-way connection 43, oil return collecting pipe 47, return
The dirt of oily 48 connector of bent sub, the plunger pressure handle 10 for pressing manual hydraulic device 49 continue pump oil, keep diesel engine fuel oil to return
Oil system pressure maintains 5Mpa or so all the time, observes whether each connector of exposed piping leaks under pressure.
5. if exposed piping dismantles cylinder head cover housing by cylinder, is pressurizeed with manual hydraulic device 49, maintain system without leakage
For pressure in 5Mpa, observation is located at piping inside the oil return of oil injector pipe 44 in cylinder head cover housing, oil return of oil injector connector 41 etc.
Whether soldering opening, joint location leak.
6. if visible piping No leakage inside cylinder head cover housing, observes 33 top of oil sprayer protective cover and fuel injector pressing sleeve 34
Whether there is the working media oil product that manual hydraulic device 49 pumps out to flow through on the cylinder-head plane of lower part, or observation cylinder head machine oil
The trace that the working media oil product whether oil return aperture has manual hydraulic device 49 to pump out is assembled, can find out connecing for oil leak accordingly
Head or fuel injector.
7. the uncertain fuel injector for suspection oil leak, can use the double public high pressure crossover subs 16 of spherical seal surface by high pressure
Oil pipe 18 presses after being directly connected to oil return of oil injector connector 41, close to determine according to whether the pressure indicating value of pressure gauge 15 declines
Envelope property and lookup leakage point.
8. for leaking not serious general Seepage, the pump oil pressure of manual hydraulic device 49 need to only be brought up to
10Mpa, voltage stabling control is slightly longer, as long as the amount of the working media oil product aggregation of leakage is enough, is just readily viewed
Judge leakage point.
9. if the multi-cylinder diesel engine of V-type arrangement or the arrangement of W types, each list is respectively connected to using by manual pressure instrument 49
Total oil return pipe of exhaust casing, pressurizes total oil return pipe of each single cylinder with manual hydraulic device 49, finds out and be unable to voltage stabilizing
Inblock cylinder, then hydraulic pressure is applied according to preceding method to the exhaust casing and searches and determine trouble point.
10. carrying out the replacement of seal according to the leak source found out, fuel system leakage maintenance is completed.After seal is replaced,
Voltage stabilizing state and leakproofness are checked according to preceding method.
Diesel engine fuel oil oil inlet piping leakproofness is checked according to same operating method or searches leakage point.
The utility model is solved has not had any effective tool and method to observe, judge since diesel engine invention
Oil dilution problem caused by the fuel injector leakage diesel oil covered in by oil sprayer protective cover, fuel injector pressing sleeve and injector plate,
Solves the detection problem of fuel system leakproofness.Can with safely, fast and accurately, labour-saving method exclude the fuel supply system
The failure of system leakage, reaches and improves trouble shooting accuracy rate, reduce the equipment shutdown maintenance time, save maintenance cost, raising labor
Dynamic work efficiency, reduce work workload, reduce maintenance personal's labor intensity, prevent maintenance personal by noise injury and machinery
The purpose of injury.
Claims (3)
1. diesel fuel system leak detecting device, including manual hydraulic device (49), high-pressure oil pipe (18), high pressure connection
(17), crossover sub (16) and diesel engine oil return manifold (39)；It is characterized in that：The oil return pipe of each fuel injector of diesel engine is logical
Cross pipeline and be connected to return flow oil manifold (39)；Manual hydraulic device is fixed on diesel oil machine base (28), manual hydraulic device
It is connected to by high pressure connection (17), high-pressure oil pipe (18), crossover sub (16) on return flow oil manifold (39)；High pressure connection
(17) be manual hydraulic device (49) fuel discharge port, for connecting high-pressure oil pipe (18)；Crossover sub (16) is used for height
Pressuring oil pipe (18) is connected from the return flow oil manifold (39) of different connector models；Manual hydraulic device (49) is used to pump out work
Medium Oil, reversely to be pressed to return flow oil manifold (39)；Pressure gauge (15) is installed on manual hydraulic device (49), is pressed
Power table (15) shows pressure value.
2. the diesel fuel system leak detecting device described in claim 1, it is characterised in that：Manual hydraulic device (49) wraps
Include mounting base (29), oil drum (11), three-way connection (14), fuel feed pump plunger pressure handle (10) and fuel feed pump plunger (8)；Mounting base (29)
Tail end be provided with plunger piston sleeve of oil pump (6), fuel feed pump plunger (8) is arranged in plunger piston sleeve of oil pump (6)；The bottom of fuel feed pump plunger (8)
Plunger return spring (2) is set；The top of fuel feed pump plunger (8) sets fuel feed pump plunger pressure handle (10), and fuel feed pump plunger pressure handle (10) is logical
Cross hinge (9) and joint pin (21) is fixed in mounting base (29)；The oil pocket of fuel feed pump plunger is connected with oil duct (26), oil duct (26)
For oil inlet and oil extraction shared track；The oil inlet and oil discharge outlet of oil duct (26) set inlet valve and draining valve respectively, inlet valve also with
Oil drum (11) connects；The tail end of oil duct (26) is blocked by technique plug (1)；Oil drum (11) is fixed in mounting base (29),
High pressure center pipe (20) is provided with oil drum (11), the lower end of high pressure center pipe (20) is plugged in oil extraction valve base (22),
The upper end of high pressure center pipe (20) is plugged in seal head (13), and upper seal head (13) is connected with three-way connection (14) input terminal
It is logical；The three-way connection (14) is arranged on the end that pumps out of manual hydraulic device, the second output terminal and pressure gauge of three-way connection (14)
(15) connect, the first output terminal connection high pressure connection (17) of three-way connection (14).
3. the diesel fuel system leak detecting device described in claim 2, it is characterised in that：Oil extraction valve base (22) and upper
Closure gasket groove is both provided with seal head (13), sealing ring is installed in closure gasket groove, high pressure center pipe (20) top and bottom are equal
Sealed by sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721121834.3U CN207245906U (en) | 2017-09-04 | 2017-09-04 | Diesel fuel system leak detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721121834.3U CN207245906U (en) | 2017-09-04 | 2017-09-04 | Diesel fuel system leak detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207245906U true CN207245906U (en) | 2018-04-17 |
Family
ID=61885115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721121834.3U Expired - Fee Related CN207245906U (en) | 2017-09-04 | 2017-09-04 | Diesel fuel system leak detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207245906U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111451989A (en) * | 2020-04-01 | 2020-07-28 | 江苏核电有限公司 | Double-ball-bowl joint oil pipe assembly detection method |
-
2017
- 2017-09-04 CN CN201721121834.3U patent/CN207245906U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111451989A (en) * | 2020-04-01 | 2020-07-28 | 江苏核电有限公司 | Double-ball-bowl joint oil pipe assembly detection method |
| CN111451989B (en) * | 2020-04-01 | 2021-05-18 | 江苏核电有限公司 | Double-ball-bowl joint oil pipe assembly detection method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180417 Termination date: 20180904 |
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| CF01 | Termination of patent right due to non-payment of annual fee |