CN109184997B - Safety protection device of marine electronic control high-pressure common rail system - Google Patents
Safety protection device of marine electronic control high-pressure common rail system Download PDFInfo
- Publication number
- CN109184997B CN109184997B CN201811318085.2A CN201811318085A CN109184997B CN 109184997 B CN109184997 B CN 109184997B CN 201811318085 A CN201811318085 A CN 201811318085A CN 109184997 B CN109184997 B CN 109184997B
- Authority
- CN
- China
- Prior art keywords
- common rail
- pipe
- oil
- adapter body
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000007788 liquid Substances 0.000 claims description 17
- 230000007704 transition Effects 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 3
- 230000007257 malfunction Effects 0.000 abstract 1
- 239000000446 fuel Substances 0.000 description 14
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
-
- 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
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/003—Measuring variation of fuel pressure in high pressure line
Abstract
The invention sets up the adapter body (2) on the common rail pipe (7), then set up PCV valve (1), oil return pipe (3) and rail pressure sensor (6) on the adapter body (2) separately, when the diesel engine parks abnormally or the high-pressure common rail system of the electric control malfunctions, can reach the purpose of controlling the pressure in the common rail pipe through controlling PCV valve, namely when the high-pressure common rail system of the electric control parks abnormally, can remotely control and reduce the pressure in the common rail pipe to the required value, has avoided the work of manual depressurization, has guaranteed the security of the experimenter, can reduce the rail pressure through controlling PCV valve at the same time, avoid the diesel engine to break down, guarantee the operational reliability of the common rail diesel engine, etc.
Description
Technical Field
The invention relates to the technical field of diesel engines, in particular to a safety protection device of a marine electronic control high-pressure common rail system.
Background
In order to meet the increasingly stringent emission regulation requirements, diesel engine manufacturers in all countries of the world are actively developing new products to reduce the emission of diesel engines, and in the technology for reducing the emission of diesel engines, the electric control high-pressure common rail fuel injection technology has a unique application prospect.
The electric control high pressure common rail fuel injection technology is that a common rail fuel injection pump is used for conveying high pressure fuel into a common rail pipe, and the aim of respectively adjusting fuel injection pressure and fuel injection quantity and accurately optimizing combustion efficiency according to the change of power and rotating speed of a diesel engine and the change of the fuel supply pressure in the common rail pipe and the opening time of an electric control fuel injector is achieved by accurately controlling the fuel supply pressure in the common rail pipe, so that the economy of the diesel engine can be improved and the emission can be reduced in a full working condition range. Particularly, the low-speed performance of the diesel engine is optimized, so that the electric control high-pressure common rail system is widely applied to the field of marine diesel engines. The pressure in the common rail pipe basically keeps the highest working pressure and reaches more than 180MPa, and if the diesel engine is abnormally stopped, the pressure in the common rail pipe keeps the peak pressure of 180MPa, so that the diesel engine cannot be started (remark: the normal starting rail pressure is 400 bar), and the starting test requirement of a classification society cannot be met. If the pressure is released manually, the pressure may be harmful to personnel; if the electric control high-pressure common rail system fails, rail pressure cannot be controlled, and even the diesel engine is damaged. In order to avoid the occurrence of the above situations, the current marine electronic control high-pressure common rail system is usually provided with a mechanical pressure limiting valve, and pressure relief and the like can be realized only when the pressure in the common rail system exceeds a limit value.
Therefore, it is highly desirable to provide a safety protection device for a marine electrically controlled high voltage common rail system to meet the current demands.
Disclosure of Invention
In order to overcome the defects in the background art, the invention provides a safety protection device of a marine electric control high-pressure common rail system, which is characterized in that an adapter body is arranged on a common rail pipe, and then a PCV valve, an oil return pipe and a rail pressure sensor are respectively arranged on the adapter body.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
the utility model provides a safety arrangement of marine automatically controlled high pressure common rail system, includes PCV valve, adapter, returns oil pipe, rail pressure sensor and common rail pipe the fluid reposition of redundant personnel interface department of common rail pipe is equipped with the adapter, the adapter is hollow structure be equipped with rail pressure sensor, the oil pipe that returns and the PCV valve that link up to middle part hole on the adapter respectively, the case of PCV valve corresponds the oil inlet of returning oil pipe, returns oil pipe's oil-out and connects the oil tank, rail pressure sensor and PCV valve respectively through line connection control system formation marine automatically controlled high pressure common rail system's safety arrangement.
The safety protection device of the marine electric control high-pressure common rail system is characterized in that the PCV valve is a normally open valve.
The marine safety protection device of the electric control high-pressure common rail system comprises a marine electric control high-pressure common rail system, wherein the lower end of a switching body is fixed on an oil liquid split joint of a common rail pipe through a pipe joint nut, an oil liquid channel is arranged in the middle of the switching body, a sensor connecting port penetrating through the oil liquid channel is arranged on the outer edge surface of the middle of the switching body, a rail pressure sensor is arranged on the sensor connecting port, an oil return pipe joint penetrating through the oil liquid channel is arranged on the outer edge surface of the upper part of the switching body, an oil return pipe is arranged on the oil return pipe joint, a valve joint penetrating through the oil liquid channel is arranged at the upper end of the switching body, and a PCV valve is arranged on the valve joint.
The safety protection device of the marine electric control high-pressure common rail system is characterized in that a screwing gasket is arranged between the inner edge surface of the pipe joint nut and the outer edge surface of the lower end of the common rail pipe.
The marine safety protection device of the electric control high-pressure common rail system is characterized in that the outer edge surface of the pipe joint nut is hexagonal, an outer thread is arranged on the outer edge surface of the lower end of the pipe joint nut, a through hole is formed in the middle of the pipe joint nut, an O-shaped groove is formed in the upper portion of the through hole, and an O-shaped ring is arranged in the O-shaped groove.
The marine safety protection device of the electric control high-pressure common rail system is characterized in that the oil return pipe is fixed on the oil return pipe connector through a pipe joint screw, an oil hole is formed in the middle of the pipe joint screw, and at least one group of crisscross through holes penetrating to the oil hole are formed in the outer edge surface of the pipe joint screw.
The safety protection device of the marine electronic control high-pressure common rail system is characterized in that a transition block is sleeved on the outer edge surface of the middle part of the adapter body, one side of the transition block is provided with a threaded hole, a rail pressure sensor is arranged in the threaded hole, and a detection head of the rail pressure sensor is connected with a sensor connecting port on the adapter body.
The marine safety protection device of the electric control high-pressure common rail system is characterized in that a screwing table is arranged on the upper portion of the outer edge surface of the adapter body, and the screwing table is quadrilateral or hexagonal.
By adopting the technical scheme, the invention has the following advantages:
according to the invention, the switching body is arranged on the common rail pipe, and then the PCV valve, the oil return pipe and the rail pressure sensor are respectively arranged on the switching body, so that when the diesel engine is abnormally stopped or an electric control high-pressure common rail system fails, the purpose of controlling the pressure in the common rail pipe can be achieved by controlling the PCV valve, namely, when the electric control high-pressure common rail system is abnormally stopped, the pressure in the common rail pipe can be reduced to a required value by remote control, the manual depressurization work is avoided, the safety of test personnel is ensured, and meanwhile, when the rail pressure is continuously increased due to the occurrence of the system failure of the electric control high-pressure common rail, the rail pressure is reduced by controlling the PCV valve, the diesel engine is prevented from failure, the operation reliability of the common rail diesel engine is ensured, and the like.
Drawings
FIG. 1 is a schematic diagram of an explosive structure of the present invention;
FIG. 2 is a schematic diagram of the structure of the present invention;
in the figure: 1. a PCV valve; 2. An adapter; 3. an oil return pipe; 4. pipe joint screws; 5. a transition block; 6. a rail pressure sensor; 7. a common rail pipe; 8. screwing in the gasket; 9. and (5) pipe joint nuts.
Detailed Description
The present invention will be explained in more detail by the following examples, which are not intended to limit the scope of the invention;
it should be noted that, in describing the structure, the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The safety protection device of the marine electric control high-pressure common rail system comprises a PCV valve 1, an adapter body 2, an oil return pipe 3, a rail pressure sensor 6 and a common rail pipe 7, wherein the adapter body 2 is arranged at an oil liquid split joint of the common rail pipe 7, the adapter body 2 is of a hollow structure, the adapter body 2 is respectively provided with the rail pressure sensor 6, the oil return pipe 3 and the PCV valve 1 which penetrate through an inner hole in the middle, the PCV valve 1 is a normally open valve, a valve core of the PCV valve 1 corresponds to an oil inlet of the oil return pipe 3, an oil outlet of the oil return pipe 3 is connected with an oil tank, and the rail pressure sensor 6 and the PCV valve 1 are respectively connected with a control system through lines to form the safety protection device of the marine electric control high-pressure common rail system.
Further, the lower end of the adapter body 2 is fixed on the oil liquid diversion interface of the common rail pipe 7 through a pipe joint nut 9, and when the adapter is implemented, the outer edge surface of the pipe joint nut 9 is hexagonal, an external thread is arranged on the outer edge surface of the lower end of the pipe joint nut 9, a through hole is arranged in the middle of the pipe joint nut 9, an O-shaped groove is arranged at the upper part of the through hole, an O-shaped ring is arranged in the O-shaped groove, and a screwing gasket 8 is arranged between the inner edge surface of the pipe joint nut 9 and the outer edge surface of the lower end of the common rail pipe 7; the middle part of the adapter body 2 is provided with an oil liquid channel, the outer edge surface of the middle part of the adapter body 2 is provided with a sensor connector communicated with the oil liquid channel, the sensor connector is provided with a rail pressure sensor 6, the outer edge surface of the upper part of the adapter body 2 is provided with an oil return pipe interface communicated with the oil liquid channel, the oil return pipe interface is provided with an oil return pipe 3, the upper end head of the adapter body 2 is provided with a valve interface communicated with the oil liquid channel, and the valve interface is provided with a PCV valve 1.
Further, the oil return pipe 3 is fixed on the oil return pipe interface through the pipe joint screw 4, an oil hole is arranged in the middle of the pipe joint screw 4, and at least one group of crisscross through holes penetrating to the oil hole are arranged on the outer edge surface of the pipe joint screw 4.
Further, a transition block 5 is sleeved on the outer edge surface of the middle part of the adapter body 2, a threaded hole is formed in one side of the transition block 5, a rail pressure sensor 6 is arranged in the threaded hole, and a detection head of the rail pressure sensor 6 is connected with a sensor connecting port on the adapter body 2.
Further, a screwing table is arranged at the upper part of the outer edge surface of the adapter body 2, and the screwing table is quadrilateral or hexagonal.
The working principle of the invention is as follows: the high-pressure fuel in the common rail pipe 7 passes through the inner hole of the adapter body 2, one path is contacted with the rail pressure sensor 6, the rail pressure sensor 6 displays the pressure value in the common rail pipe 7 through an electric signal, the other path is contacted with the PCV valve 1, when the PCV valve 1 is in an electrified state, the high-pressure fuel passes through the conical surface seal with the adapter body 2, a common rail system is closed, the pressure of the common rail system is ensured to be in a required range, if the PCV valve 1 is powered off, the high-pressure fuel does not pass through the conical surface seal with the adapter body 2, the high-pressure fuel passes through the pipe joint screw 4 and returns to the fuel tank through the oil return pipe 3, and the purpose of reducing pressure is achieved.
In the concrete implementation of the invention, the inside of the pipe joint screw 4 is provided with a unthreaded hole, the outside is provided with threads for connecting with the adapter body 2, and the outer edge surface is provided with cross holes for oil circulation, namely, the adapter body 2 flows into the oil return pipe 3.
The transition block 5 is of a cube structure, the upper surface of the transition block 5 is provided with a stepped hole penetrating to the lower surface, the adapter body is ensured to penetrate through, and the left end of the transition block is provided with a threaded hole for fixing the rail pressure sensor 6.
The rail pressure sensor 6 is connected with the transition block 5 through threads, the head part is a conical surface, and the head part is matched and sealed with a conical hole on the adapter body 2;
the pipe joint nut 9 is internally processed into a through hole, wherein a groove is processed at the upper part of the pipe joint nut and is used for installing an O-shaped ring, a thread is processed at the lower part of the pipe joint nut and is used for being connected with a screwing-in gasket 8, and a thread is processed at the outer part of the pipe joint nut and is connected with the common rail pipe 7;
the inner part of the screwing-in liner 8 is processed into a through hole, the upper part is processed into threads and is used for being connected with the adapter body 2, the lower end of the outer part is processed into a conical surface, the conical surface is matched with the conical hole in the pipe joint nut 9, and the distance between the pipe joint nut 9 and the end face of the adapter body 2 is ensured by adjusting the screwing-in depth;
the lower part of the rotating step body 2 is machined into a conical surface, the conical hole of the common rail pipe 7 is sealed, high-pressure fuel is in contact with the rail pressure sensor 6 through an inner hole, the rail pressure sensor 6 is in contact with the PCV valve 1 through an electric signal, the PCV valve 1 is a normally open valve, the PCV valve 1 is closed when the electric power is on, the rail pressure can be ensured to be within a required range, if an electric control system fails or stops accidentally, the PCV valve 1 is not in contact with the sealing surface of the rotating step body 2 any more through power failure, and the pressure in the common rail pipe 7 can be released.
The invention has the following advantages:
1. if the electric control high-pressure common rail system is stopped abnormally, the pressure in the common rail pipe 7 can be reduced to a required value by remote control, so that the safety of test personnel is ensured;
2. if the rail pressure is continuously increased due to the failure of the electric control high-pressure common rail system, the rail pressure can be reduced by controlling the PCV valve 1, so that the failure of the diesel engine is avoided, and the running reliability of the common rail diesel engine is ensured;
3. the PCV valve 1 and the rail pressure sensor 6 are integrated together through the adapter body 2, so that the rail pressure can be tested and adjusted in the same device, and the testing accuracy and the like are ensured.
The invention is not described in detail in the prior art.
The embodiments selected herein for the purposes of disclosing the present invention are presently considered to be suitable, however, it is to be understood that the present invention is intended to include all such variations and modifications as fall within the spirit and scope of the present invention.
Claims (5)
1. The utility model provides a marine automatically controlled high pressure common rail system's safety arrangement, includes PCV valve (1), adapter (2), returns oil pipe (3), rail pressure sensor (6) and common rail pipe (7), characterized by: an adapter body (2) is arranged at an oil liquid split joint of the common rail pipe (7), the adapter body (2) is of a hollow structure, a rail pressure sensor (6), an oil return pipe (3) and a PCV valve (1) which are communicated with an inner hole in the middle are respectively arranged on the adapter body (2), a valve core of the PCV valve (1) corresponds to an oil inlet of the oil return pipe (3), an oil outlet of the oil return pipe (3) is connected with an oil tank, and the rail pressure sensor (6) and the PCV valve (1) are respectively connected with a control system through a circuit to form a safety protection device of the marine electric control high-pressure common rail system; the lower end of the adapter body (2) is fixed on an oil liquid split joint of the common rail pipe (7) through a pipe joint nut (9), an oil liquid channel is arranged in the middle of the adapter body (2), a sensor connecting port penetrating through the oil liquid channel is arranged on the outer edge surface of the middle of the adapter body (2), a rail pressure sensor (6) is arranged on the sensor connecting port, an oil return pipe joint penetrating through the oil liquid channel is arranged on the outer edge surface of the upper part of the adapter body (2), an oil return pipe (3) is arranged on the oil return pipe joint, a valve joint penetrating through the oil liquid channel is arranged at the upper end of the adapter body (2), and a PCV valve (1) is arranged on the valve joint; the oil return pipe (3) is fixed on an oil return pipe interface through a pipe joint screw (4), an oil hole is formed in the middle of the pipe joint screw (4), and at least one group of crisscross through holes penetrating into the oil hole are formed in the outer edge surface of the pipe joint screw (4).
2. The safety protection device of the marine electrically controlled high pressure common rail system according to claim 1, characterized in that: the PCV valve (1) is a normally open valve.
3. The safety protection device of the marine electrically controlled high pressure common rail system according to claim 2, characterized in that: a screwing gasket (8) is arranged between the inner edge surface of the pipe joint nut (9) and the outer edge surface of the lower end of the common rail pipe (7).
4. The safety protection device of the marine electrically controlled high pressure common rail system according to claim 1, characterized in that: the transition block (5) is sleeved on the outer edge surface of the middle part of the adapter body (2), a threaded hole is formed in one side of the transition block (5), a rail pressure sensor (6) is arranged in the threaded hole, and a detection head of the rail pressure sensor (6) is connected with a sensor connecting port on the adapter body (2).
5. The safety protection device of the marine electrically controlled high pressure common rail system according to claim 1, characterized in that: the upper part of the outer edge surface of the adapter body (2) is provided with a screwing table, and the screwing table is quadrilateral or hexagonal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811318085.2A CN109184997B (en) | 2018-11-07 | 2018-11-07 | Safety protection device of marine electronic control high-pressure common rail system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811318085.2A CN109184997B (en) | 2018-11-07 | 2018-11-07 | Safety protection device of marine electronic control high-pressure common rail system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109184997A CN109184997A (en) | 2019-01-11 |
| CN109184997B true CN109184997B (en) | 2024-01-30 |
Family
ID=64942297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811318085.2A Active CN109184997B (en) | 2018-11-07 | 2018-11-07 | Safety protection device of marine electronic control high-pressure common rail system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109184997B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003155948A (en) * | 2001-11-19 | 2003-05-30 | Denso Corp | Common rail type fuel injection system |
| JP2003176746A (en) * | 2001-12-11 | 2003-06-27 | Denso Corp | Fuel injector for diesel engine |
| CN206234033U (en) * | 2016-12-09 | 2017-06-09 | 上海扬发动力有限公司 | A kind of Design of High Pressure Common Rail Diesel Engine |
| CN107366597A (en) * | 2017-09-15 | 2017-11-21 | 河南柴油机重工有限责任公司 | A kind of layout pattern of electronic control system in marine high-speed high-power diesel engine |
| CN207568756U (en) * | 2017-09-15 | 2018-07-03 | 河南柴油机重工有限责任公司 | A kind of electronic control system is in the layout pattern of marine high-speed high-power diesel engine |
| CN209244708U (en) * | 2018-11-07 | 2019-08-13 | 河南柴油机重工有限责任公司 | A kind of safety guard of electronic control system peculiar to vessel |
-
2018
- 2018-11-07 CN CN201811318085.2A patent/CN109184997B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003155948A (en) * | 2001-11-19 | 2003-05-30 | Denso Corp | Common rail type fuel injection system |
| JP2003176746A (en) * | 2001-12-11 | 2003-06-27 | Denso Corp | Fuel injector for diesel engine |
| CN206234033U (en) * | 2016-12-09 | 2017-06-09 | 上海扬发动力有限公司 | A kind of Design of High Pressure Common Rail Diesel Engine |
| CN107366597A (en) * | 2017-09-15 | 2017-11-21 | 河南柴油机重工有限责任公司 | A kind of layout pattern of electronic control system in marine high-speed high-power diesel engine |
| CN207568756U (en) * | 2017-09-15 | 2018-07-03 | 河南柴油机重工有限责任公司 | A kind of electronic control system is in the layout pattern of marine high-speed high-power diesel engine |
| CN209244708U (en) * | 2018-11-07 | 2019-08-13 | 河南柴油机重工有限责任公司 | A kind of safety guard of electronic control system peculiar to vessel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109184997A (en) | 2019-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11953153B2 (en) | High-pressure gas cylinder valve for vehicle | |
| CN109103482B (en) | Hydrogen-in integrated manifold block and fuel cell using same | |
| CN104454275A (en) | Synchronous oil supply and hold-down device for detecting high-pressure common-rail oil sprayer online and application method thereof | |
| CN209244708U (en) | A kind of safety guard of electronic control system peculiar to vessel | |
| CN109184997B (en) | Safety protection device of marine electronic control high-pressure common rail system | |
| CN201546860U (en) | Oil-way detection connecting device of diesel high-pressure common-rail oil injector | |
| CN209179918U (en) | New Marine low speed machine high pressure co-rail system | |
| CN104806406A (en) | Normally closed electro-mechanical hybrid high-pressure oil pump | |
| CN107905930A (en) | A kind of heavy monoblock pump peculiar to vessel with anti-outer dripping structure | |
| CN202955297U (en) | Threaded pilot-operated overflow valve | |
| CN103791965B (en) | Gas meter flat wire sealing assembly | |
| CN204677346U (en) | The electromechanical combined formula high pressure oil pump of normal close type | |
| CN215595707U (en) | Piston cooling nozzle and engine using same | |
| CN212398563U (en) | Welding gun joint | |
| CN109441685A (en) | Marine low-speed machine high pressure co-rail system | |
| CN213065568U (en) | High-pressure water pressure stabilizing valve block structure | |
| CN204357611U (en) | A kind of synchronous fuel feeding of high pressure common rail injector on-line checkingi and hold down gag | |
| CN217841877U (en) | Performance detection device for electric control oil injector | |
| CN207609495U (en) | A kind of heavy monoblock pump peculiar to vessel with anti-outer dripping structure | |
| CN203441659U (en) | Oil injector assembly embedded into cylinder cover of diesel engine and used for injecting and returning oil | |
| CN206368861U (en) | A kind of steam turbine and its EH oil system | |
| CN208380731U (en) | Control device for harbour tyre crane diesel electric power plant oil supply system duplicate protection | |
| CN113335550A (en) | Airplane ground environment control vehicle with automatic filling function | |
| CN203551284U (en) | Fault cylinder detection block assembly of high pressure common rail diesel engine | |
| CN204361026U (en) | For the spring hydraulic stored energy mechanism of the automatic divide-shut brake powder operation device of primary cut-out |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |