CN213980968U - Diesel engine safety protection system - Google Patents
Diesel engine safety protection system Download PDFInfo
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- CN213980968U CN213980968U CN202023036691.0U CN202023036691U CN213980968U CN 213980968 U CN213980968 U CN 213980968U CN 202023036691 U CN202023036691 U CN 202023036691U CN 213980968 U CN213980968 U CN 213980968U
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Abstract
The utility model relates to the technical field of diesel engine safety protection, in particular to a diesel engine safety protection system, which comprises an air control system, an emergency stop valve, a solenoid valve A and a solenoid valve B; wherein: the input end of the emergency stop valve is respectively connected with the pneumatic control system and a belt fuel pump of the diesel engine; the output end of the emergency stop valve is connected with an oil injection pump group in the diesel engine; the input end of the electromagnetic valve A and the input end of the electromagnetic valve B are respectively connected with the output end of the oil injection pump group; and the output end of the electromagnetic valve A and the output end of the electromagnetic valve B are respectively connected with the oil tank. The utility model discloses can take the fuel in evacuation injection pump and the associative low pressure oil pipe rapidly, cut off the diesel engine fuel feeding rapidly, can effectually prevent the emergence of diesel engine driving and other serious accidents.
Description
Technical Field
The utility model relates to a diesel engine overspeed protection technical field, in particular to diesel engine safety protection system.
Background
Overspeed protection devices commonly used for diesel engines include governor overspeed protection, mechanical overspeed stopping devices (limit governors) and the like. When the electronic speed regulator or the electro-hydraulic speed regulator detects that the rotating speed of the diesel engine exceeds the highest set rotating speed, the speed regulator overspeed protection device acts to reduce a rack of an oil injection pump to a zero position, so that the diesel engine is automatically stopped; when the mechanical overspeed parking device detects that the rotating speed of the diesel engine exceeds the highest set rotating speed, the mechanical overspeed parking device acts to reduce the rack of the fuel injection pump to a zero position, so that the diesel engine is automatically stopped.
The two safety protection devices are used for changing the oil supply amount to stop the diesel engine by pulling the oil injection pump rack. When the diesel engine runs under high load and high rotating speed, if the speed governor, the mechanical overspeed stopping device and the oil supply pull rod system are in fault, the oil injection quantity of the oil injection pump is reduced but not reduced in time when the diesel engine is suddenly unloaded, the rotating speed of the diesel engine is quickly increased, and the runaway accident occurs. At this time, even if the fuel delivery pump is turned off and fuel supply is stopped, the fuel with certain pressure remained in the low-pressure pipeline of the fuel injection pump is enough to make the diesel engine fly.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a diesel engine safety protection system is provided, can take the fuel among the rapid evacuation injection pump low pressure oil pipe, cut off the diesel engine fuel feeding rapidly, can effectually prevent the emergence of driving accident.
The utility model provides a solution that technical problem adopted is:
a diesel engine safety protection system comprises an air control system, an emergency stop valve, an electromagnetic valve A and an electromagnetic valve B;
wherein: the input end of the emergency stop valve is respectively connected with the pneumatic control system and a belt fuel pump of the diesel engine;
the output end of the emergency stop valve is connected with an oil injection pump group in the diesel engine;
the input end of the electromagnetic valve A and the input end of the electromagnetic valve B are respectively connected with the output end of the oil injection pump group;
and the output end of the electromagnetic valve A and the output end of the electromagnetic valve B are respectively connected with the oil tank.
Under the normal working condition of the diesel engine, the air control system is closed, the electromagnetic valve A is closed, and the electromagnetic valve B is opened; fuel oil enters the fuel injection pump group through the engine-mounted fuel pump, part of the fuel oil enters the combustion chamber through the fuel injector group for combustion, and the rest fuel oil flows back to the oil tank through the electromagnetic valve B;
when the diesel engine is overspeed or needs emergency stop, the air control system is started, the electromagnetic valve A is opened, the electromagnetic valve B is closed, and gas enters the emergency stop valve, so that low-pressure fuel in the fuel injection pump group A, the fuel injection pump group B and a connected pipeline is blown to the fuel tank, and the rapid fuel cut-off is realized; thereby realizing the quick stop of the diesel engine.
In some possible embodiments, in order to effectively realize the normal operation of the emergency stop valve when the fuel is cut off, the emergency stop valve is also connected with the fuel tank through a pipeline; the emergency stop valve is provided with four interfaces, including a gas interface A connected with a gas control system, an oil inlet interface B connected with a machine belt fuel pump, an oil delivery interface C connected with a fuel injection pump group, and an oil drainage interface D connected with an oil tank.
In some possible embodiments, the oil supply and the oil cut are realized by an emergency stop valve in order to effectively realize the oil supply and the oil cut; the oil tank comprises an oil tank A connected with the output end of the electromagnetic valve B and a purging oil tank connected with the output end of the electromagnetic valve A; and the oil drainage interface D is connected with the purging oil tank.
In some possible embodiments, a fuel filter and a check valve B are connected between the emergency stop valve and the onboard fuel pump in sequence; and the output end of the machine with the fuel pump is connected with the check valve B.
In some possible embodiments, in order to effectively avoid the air pressure from being too high, the fuel filter is damaged; a check valve A is arranged between the fuel filter and the emergency stop valve; and the output end of the check valve A is connected with the oil inlet interface B.
In some possible embodiments, in order to prevent the fuel filter from being damaged due to too high fuel pressure of the fuel pump, a safety valve is further arranged between the fuel filter and the check valve B, and a fuel drainage port of the safety valve is connected with the fuel tank a.
In some possible embodiments, in order to achieve a stable operation of the injection pump group; and a pressure regulating valve is also arranged between the electromagnetic valve B and the oil tank A.
In some possible embodiments, in order to effectively implement the driving and control of the emergency stop valve; the pneumatic control system comprises a gas cylinder and an electromagnetic valve C which are connected in sequence; and the output end of the electromagnetic valve C is connected with the emergency stop valve.
In some possible embodiments, the solenoid valve a, the solenoid valve B, and the solenoid valve C are two-position two-way solenoid valves, respectively.
In some possible embodiments, the opening pressure of the safety valve is 0.35 MPa; the pressure of the gas in the pneumatic control system is at least 3 MPa.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model effectively realizes oil cut-off through the mutual cooperation of the pneumatic control system and the emergency stop valve, thereby realizing the shutdown of the diesel engine;
the utility model inputs compressed gas into the emergency stop valve through the gas control system, the compressed gas enters a low-pressure oil inlet pipeline in front of the oil injection pump, and the fuel oil in the emergency stop valve, the low-pressure oil inlet pipeline in front of the oil injection pump, an oil cavity of the oil injection pump and a low-pressure oil return pipeline behind the oil injection pump is completely swept to a sweeping oil tank, thereby realizing rapid oil cut-off;
the safety valve is arranged between the fuel filter and the check valve B, when the oil pressure of the oil pump is too high when the engine is provided with the fuel pump, the safety valve is opened, and fuel is input into the oil tank A through the safety valve, so that the damage of the fuel filter caused by the too high oil pressure of the oil pump is effectively avoided;
the utility model discloses simple structure, practicality are strong.
Drawings
FIG. 1 is a schematic diagram of the diesel engine in normal operation after the diesel engine is connected to the diesel engine of the present invention;
FIG. 2 is a schematic diagram of the operation of the utility model when the diesel engine is overspeed or needs emergency stop after being connected with the diesel engine;
wherein: 1. a machine-mounted fuel pump; 2. a fuel filter; 3. an emergency stop valve; 4. an oil injection pump group A; 5. an oil injection pump group B; 6. a group of fuel injectors; 7. a solenoid valve B; 8. a pressure regulating valve; 9. a solenoid valve C; 10. a gas cylinder; 11. an electromagnetic valve A; 12. a check valve B; 13. a safety valve; 14. a check valve A; 15. an oil tank A; 16. and (5) purging the oil tank.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Reference herein to "first," "second," and similar words, does not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
In the implementation of the present application, "and/or" describes an association relationship of associated objects, which means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone.
In the description of the embodiments of the present application, the meaning of "a plurality" means two or more unless otherwise specified. For example, the plurality of positioning posts refers to two or more positioning posts.
To make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below with reference to the drawings in the present application, and it is obvious that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The present invention will be further explained with reference to the drawings and examples.
The utility model is realized by the following technical proposal, as shown in figures 1-2,
a diesel engine safety protection system comprises a pneumatic control system, an emergency stop valve 3, an electromagnetic valve A11 and an electromagnetic valve B7;
wherein: the input end of the emergency stop valve 3 is respectively connected with an air control system and a belt fuel pump 1 of a diesel engine;
the output end of the emergency stop valve 3 is connected with an oil injection pump group in the diesel engine;
the input end of the electromagnetic valve A11 and the input end of the electromagnetic valve B7 are respectively connected with the output end of the oil injection pump group;
the output end of the electromagnetic valve A11 and the output end of the electromagnetic valve B7 are respectively connected with the oil tank.
Under the normal working condition of the diesel engine, the air control system is closed, the electromagnetic valve A11 is closed, and the electromagnetic valve B7 is opened; fuel oil enters the fuel injection pump group through the belt fuel pump 1, meanwhile, part of the fuel oil enters the combustion chamber through the fuel injector group 6 for combustion, and the fuel oil flows back to the oil tank through the electromagnetic valve B7;
when the diesel engine is overspeed or needs emergency stop, the air control system is started, the electromagnetic valve A11 is opened, the electromagnetic valve B7 is closed, and gas enters the emergency stop valve 3, so that the low-pressure fuel in the fuel injection pump group A5, the fuel injection pump group B5 and a connected pipeline is blown to the oil tank 15, and further the rapid oil cut-off is realized; thereby realizing the quick stop of the diesel engine.
As shown in fig. 1, the injection pump group includes an injection pump group a4 and an injection pump group B5 that are connected to the injector group 6, respectively; when the fuel injection pump group A4 and the fuel injection pump group B5 work normally, fuel is supplied to the fuel injector group 6, and the fuel injector group 6 injects atomized fuel into a cylinder, so that combustion of the diesel engine is realized.
In some possible embodiments, in order to effectively realize the normal operation of the emergency stop valve 3 when fuel is cut off, the emergency stop valve 3 is also connected with a fuel tank through a pipeline; the emergency stop valve 3 is provided with four interfaces, including a gas interface A connected with a gas control system, an oil inlet interface B connected with the belt fuel pump 1, an oil delivery interface C connected with a fuel injection pump group, and an oil drainage interface D connected with an oil tank.
The emergency stop valve 3 also comprises a shell and a slide valve arranged in the shell, and four interfaces are arranged on the shell and are communicated with the interior of the shell;
as shown in fig. 1 and 2, the gas port a and the oil drain port D are respectively disposed at two ends of the housing; the oil inlet interface B and the oil delivery interface C are positioned on the side surface of the shell; under the normal state, the slide valve communicates the oil inlet interface B with the oil delivery interface C; when the diesel engine is overspeed or needs emergency stop, the air system drives the slide valve in the shell to act, compressed gas enters the emergency stop valve 3 from the gas interface A and enters the oil inlet interface B and the oil delivery interface C, and the compressed gas sweeps low-pressure fuel in the fuel injection pump group A4, the fuel injection pump group B5 and a connected pipeline to the sweeping fuel tank 16 due to the fact that the check valve A14 is arranged on the upstream of the oil inlet interface B, and therefore rapid fuel cut-off is achieved; thereby realizing the quick stop of the diesel engine.
When the fuel cut is realized, the fuel leaked from the slide valve in the emergency stop valve 3 is delivered to the fuel tank A15 through the drain port D, and the fuel pumped by the belt fuel pump 1 is delivered to the fuel tank A15 through the drain port of the safety valve 13.
In some possible embodiments, in order to effectively realize the oil supply and the oil cut through the emergency stop valve 3; the oil tank comprises an oil tank A15 connected with the output end of the electromagnetic valve B7 and a purging oil tank 16 connected with the output end of the electromagnetic valve A11; the oil drainage interface D is connected with the purging oil tank 16. The purge reservoir 16 is used to collect fuel that leaks from the spool valve.
In some possible embodiments, a fuel filter 2 and a check valve B12 are connected between the emergency stop valve 3 and the onboard fuel pump 1 in sequence; wherein, the output end of the machine belt fuel pump 1 is connected with a check valve B12.
The fuel filter 2 effectively prevents particulate matters, water and impurities in the fuel, and ensures that precision parts of a fuel system are prevented from being abraded and damaged.
The check valve B12 effectively prevents the oil from flowing backwards.
In some possible embodiments, in order to effectively avoid the compressed gas from being too high, which leads to the destruction of the fuel filter 2; a check valve A14 is arranged between the fuel filter 2 and the emergency stop valve 3; and the output end of the check valve A14 is connected with the oil inlet interface B.
In some possible embodiments, in order to prevent the fuel filter 2 from being damaged by too high fuel pump oil pressure, a safety valve 13 is further arranged between the fuel filter 2 and the check valve B12, and a drain port of the safety valve 13 is connected with the oil tank a 15.
In some possible embodiments, a pressure regulating valve 8 is further arranged between the solenoid valve B7 and the oil tank a 15.
In some possible embodiments, in order to effectively implement the actuation and control of the emergency stop valve 3; the pneumatic control system comprises a gas cylinder 10 and an electromagnetic valve C9 which are connected in sequence; the output of the solenoid valve C9 is connected to the gas connection a of the emergency stop valve 3.
Compressed gas is filled in the gas cylinder 10, when the diesel engine is overspeed or needs emergency stop, the electromagnetic valve A11 and the electromagnetic valve C9 are opened, and the electromagnetic valve B7 is closed; compressed gas enters the emergency stop valve 3 from the gas cylinder 10 through the gas interface A, the emergency stop valve 3 acts under the action of the compressed gas, the compressed gas enters an oil inlet main pipe of the oil injection pump group, all fuel oil in the oil inlet main pipe is swept to the sweeping oil tank 16 through the electromagnetic valve through an oil outlet pipeline of the oil injection pump group, and the diesel engine is shut off and stops by exhausting residual fuel oil in a low-pressure fuel oil pipeline and an oil cavity of the oil injection pump.
Under the normal working condition of the diesel engine, a fuel oil path is as shown in figure 1, fuel oil enters a fuel injection pump group A4 and a fuel injection pump group B5 through a fuel oil pump 1, a check valve, a fuel oil filter 2, the check valve and an emergency stop valve 3, part of the fuel oil is injected into a combustion chamber through a fuel oil injector group 6 for combustion, and the rest of the fuel oil flows back to a fuel tank through an electromagnetic valve B7 and a pressure regulating valve 8.
In some possible embodiments, the solenoid valve a11, the solenoid valve B7, and the solenoid valve C9 are two-position two-way solenoid valves, respectively.
In some possible embodiments, the opening pressure of the safety valve 13 is 0.35 MPa; the pressure of the gas in the pneumatic control system is at least 3 MPa.
In order to prevent the fuel oil filter 2 from being damaged by too high oil pressure of the fuel pump, a safety valve 13 is arranged in front of the filter, the opening pressure of the safety valve 13 is 0.35MPa, and when the oil pressure in a pipeline is higher than 0.35MPa, the fuel oil flows back to the fuel tank 15 from the safety valve 13.
In order to protect the fuel filter 2 from being damaged by the compressed gas of 3MPa, a check valve A14 is arranged, and when the compressed gas of 3MPa enters the emergency stop valve 3, the check valve acts to protect the fuel filter 2.
Preferably, the compressed gas is compressed air;
preferably, the utility model discloses with speed regulator overspeed protection, machinery overspeed parking device mutual independence, can set up on the diesel engine simultaneously, each other does not influence. When the diesel engine hypervelocity or need promptly to shut down, the utility model discloses cut off remaining fuel in fuel oil supply evacuation low pressure fuel pipeline and the injection pump oil pocket simultaneously for the diesel engine is very fast because the automatic flame-out of lack of oil effectively avoids the diesel engine to overspeed.
The foregoing detailed description of the embodiments of the present application has been presented, and specific examples have been applied in the present application to explain the principles and implementations of the present application, and the above description of the embodiments is only used to help understand the method and the core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A diesel engine safety protection system which characterized in that: comprises an air control system, an emergency stop valve (3), an electromagnetic valve A (11) and an electromagnetic valve B (7);
wherein: the input end of the emergency stop valve (3) is respectively connected with an air control system and a belt fuel pump (1) of a diesel engine;
the output end of the emergency stop valve (3) is connected with an oil injection pump group in the diesel engine;
the input end of the electromagnetic valve A (11) and the input end of the electromagnetic valve B (7) are respectively connected with the output end of the oil injection pump group;
and the output end of the electromagnetic valve A (11) and the output end of the electromagnetic valve B (7) are respectively connected with an oil tank.
2. The diesel engine safety protection system according to claim 1, characterized in that: the emergency stop valve (3) is also connected with an oil tank through a pipeline; the emergency stop valve (3) is provided with four interfaces, including a gas interface A connected with a pneumatic control system, an oil inlet interface B connected with the mechanical belt fuel pump (1), an oil delivery interface C connected with the fuel injection pump group, and an oil drainage interface D connected with an oil tank.
3. The diesel engine safety protection system according to claim 2, characterized in that: the oil tank comprises an oil tank A (15) connected with the output end of the electromagnetic valve B (7) and a purging oil tank (16) connected with the output end of the electromagnetic valve A (11); and the oil drainage interface D is connected with a purging oil tank (16).
4. A diesel engine safety protection system according to claim 3, characterized in that: a fuel filter (2) and a check valve B (12) are sequentially connected between the emergency stop valve (3) and the engine belt fuel pump (1); wherein, the output end of the machine belt fuel pump (1) is connected with a check valve B (12).
5. The diesel engine safety protection system of claim 4, wherein: a check valve A (14) is arranged between the fuel filter (2) and the emergency stop valve (3); the output end of the check valve A (14) is connected with the oil inlet interface B.
6. The diesel engine safety protection system of claim 4, wherein: a safety valve (13) is further arranged between the fuel filter (2) and the check valve B (12), and an oil drainage port of the safety valve (13) is connected with an oil tank A (15).
7. A diesel engine safety protection system according to any one of claims 3-6, characterized in that: and a pressure regulating valve (8) is also arranged between the electromagnetic valve B (7) and the oil tank A (15).
8. The diesel engine safety protection system according to any one of claims 1 to 6, wherein: the pneumatic control system comprises a gas cylinder (10) and an electromagnetic valve C (9) which are connected in sequence; the output end of the electromagnetic valve C (9) is connected with the emergency stop valve (3).
9. The diesel engine safety protection system of claim 8, wherein: the electromagnetic valve A (11), the electromagnetic valve B (7) and the electromagnetic valve C (9) are two-position two-way electromagnetic valves respectively.
10. The diesel engine safety protection system of claim 6, wherein: the opening pressure of the safety valve (13) is 0.35 MPa; the pressure of the gas in the pneumatic control system is at least 3 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023036691.0U CN213980968U (en) | 2020-12-16 | 2020-12-16 | Diesel engine safety protection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023036691.0U CN213980968U (en) | 2020-12-16 | 2020-12-16 | Diesel engine safety protection system |
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| CN213980968U true CN213980968U (en) | 2021-08-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483269A (en) * | 2020-12-16 | 2021-03-12 | 中车资阳机车有限公司 | Diesel engine safety protection system |
| CN114962013A (en) * | 2022-06-02 | 2022-08-30 | 陕西柴油机重工有限公司 | Overspeed parking redundancy system for diesel engine |
-
2020
- 2020-12-16 CN CN202023036691.0U patent/CN213980968U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483269A (en) * | 2020-12-16 | 2021-03-12 | 中车资阳机车有限公司 | Diesel engine safety protection system |
| CN112483269B (en) * | 2020-12-16 | 2024-04-16 | 中车资阳机车有限公司 | Diesel engine safety protection system |
| CN114962013A (en) * | 2022-06-02 | 2022-08-30 | 陕西柴油机重工有限公司 | Overspeed parking redundancy system for diesel engine |
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