Emergency stop device and emergency stop system

Abstract

The invention discloses an emergency stop system which comprises an emergency stop device, an oil tank, an oil delivery pump, a duplex filter, a high-pressure oil pump and an oil sprayer. A channel I, a channel II, a channel III, a channel IV and a channel V are respectively arranged in the emergency stop device; two ends of the channel I are respectively communicated with the oil outlet end of the oil tank and the oil inlet end of the oil delivery pump through pipelines; the two ends of the channel II are respectively communicated with the oil inlet end of the duplex filter and the oil outlet end of the oil delivery pump through pipelines; the two ends of the channel III are respectively communicated with the oil outlet end of the duplex filter and the oil inlet end of the high-pressure oil pump through pipelines; two ends of the channel IV are respectively communicated with the oil return end of the oil tank and the oil return end of the high-pressure oil pump through pipelines; according to the emergency stop system, the situation that the emergency stop time is long when the diesel engine encounters an emergency situation in the operation process is avoided, and rapid stop of the diesel engine under the emergency situation is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of diesel engines, in particular to an emergency stop device and an emergency stop system. Background Art

[0002] When a diesel engine is operating, it may encounter many emergency situations that require us to quickly switch the diesel engine from a running state to a stopped state. For example, when the diesel engine speed exceeds the specified speed, the diesel engine is prone to shaft seizure or cylinder scuffing, causing damage to the diesel engine. Therefore, the emergency stop device is very important for emergency situations. In an emergency, the diesel engine receives the stop command and achieves the purpose of quickly cutting off fuel and stopping.

[0003] The current emergency stop method is mostly achieved by closing the intake pipe or the main oil inlet pipe, and the combustion stops due to lack of oxygen or fuel, thus achieving the stop date. However, there will be residual fuel in the pipeline, which makes it impossible to stop the combustion process immediately, resulting in the diesel engine being unable to stop immediately. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide an emergency stop device and an emergency stop system to solve the technical problem that the diesel engine cannot be stopped immediately in an emergency due to residual fuel in the pipeline.

[0005] To achieve the above object, the present invention provides the following technical solutions: an emergency stop system, comprising an emergency stop device, a fuel tank, an oil transfer pump, a duplex filter, a high-pressure oil pump and a fuel injector;

[0006] The emergency stop device is respectively provided with channel I, channel II, channel III, channel IV and channel V;

[0007] The two ends of the channel I are connected to the oil outlet of the oil tank and the oil inlet of the oil pump through pipelines respectively;

[0008] The two ends of the channel II are connected to the oil inlet end of the duplex filter and the oil outlet end of the oil pump through pipelines respectively;

[0009] The two ends of the channel III are connected to the oil outlet of the duplex filter and the oil inlet of the high-pressure oil pump through pipelines respectively;

[0010] The two ends of the channel IV are connected to the oil return end of the oil tank and the oil return end of the high-pressure oil pump through pipelines respectively;

[0011] The oil outlet end of the high-pressure oil pump is connected to the oil inlets of multiple injectors respectively, and the channel V is connected to the oil return ports of a corresponding number of injectors through pipelines. The channel V and channel IV are internally connected.

[0012] As a preferred technical solution of the present invention, when the diesel engine is operating normally, its operating mode is as follows: the fuel in the fuel tank enters the fuel pump through channel I of the emergency stop device, the fuel pressurized by the fuel pump enters the duplex filter through channel II of the emergency stop device, the fuel filtered by the duplex filter enters the high-pressure fuel pump through channel III of the emergency stop device, the fuel in the high-pressure fuel pump is delivered to each injector for operation, and the fuel returning from each injector enters channel V and merges into the return channel IV of the high-pressure fuel pump, and then flows back to the fuel tank together;

[0013] When emergency stop is required, its working mode is: under the action of the stop signal, channel I and channel III in the emergency stop device are no longer connected, channel II, channel IV and channel V are connected, and the oil pump is used to pump back and return it to the fuel tank through the pipeline to prevent the fuel system from continuing to work.

[0014] As a preferred technical solution of the present invention, a first one-way valve is provided on the connecting pipeline between the channel I and the oil tank, a second one-way valve is provided on the connecting pipeline between the channel II and the oil pump, and a third one-way valve is provided on the connecting pipeline between the channel IV and the high-pressure oil pump.

[0015] As a preferred technical solution of the present invention, a manual pump is provided on one side of the emergency stop device, the oil outlet end of the manual pump is connected to the channel II, and the oil return end of the manual pump is connected to the channel I.

[0016] As a preferred technical solution of the present invention, the emergency stop device includes an oil collecting block, a sealing ring, a valve stem, a solenoid valve, an oil chamber conical surface and an oil chamber;

[0017] The channel I, channel II, channel III, channel IV and channel V are all arranged in the oil collecting block;

[0018] The oil chamber is arranged inside the oil collecting block, the channel I and channel III are connected to the oil chamber, the valve stem is arranged inside the oil chamber, three sealing rings are provided on the outer side of the valve stem, three oil chamber cone surfaces are provided inside the oil chamber, the three oil chamber cone surfaces are respectively located at channel I, channel II and therebetween, the oil chamber cone surfaces cooperate with the sealing rings, the other end of the valve stem is connected to the solenoid valve, the solenoid valve is installed on one side of the oil collecting block, and the input end of the solenoid valve is electrically connected to the output end of the external ECU.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: when the emergency stop device and the emergency stop system are in normal working conditions, the fuel pump pressurizes the fuel in the fuel tank and enters the injector through the pipeline to work; when in emergency stop conditions, the inertia of the fuel pump itself can quickly pump the remaining fuel in the fuel pipeline back to the fuel tank, thereby achieving the purpose of rapid stop, avoiding the situation where the emergency stop time is long when the diesel engine encounters an emergency during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of the emergency stop system of the present invention under normal working conditions;

[0021] Figure 2 This is a schematic structural diagram of the emergency stop system of the present invention under emergency stop working conditions;

[0022] Figure 3 It is a structural diagram of the emergency stop device;

[0023] Figure 4 This is a schematic diagram of the internal structure of the emergency stop device under normal working conditions;

[0024] Figure 5 This is a schematic diagram of the internal structure of the emergency stop device under emergency stop conditions;

[0025] Figure 6 This is a schematic diagram of the interface positions on channels I to V on the oil collecting block;

[0026] Figure 7 This is a schematic diagram of the interface positions on channels I to V on the oil collecting block from another direction.

[0027] In the figure: 1 emergency stop device, 101 oil collecting block, 102 sealing ring, 103 valve stem, 104 solenoid valve, 105 oil chamber cone, 106 oil chamber, 2 oil tank, 3 manual pump, 4 first one-way valve, 5 oil delivery pump, 6 second one-way valve, 7 third one-way valve, 8 duplex filter, 9 high-pressure oil pump, 10 fuel injector. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 3-7, the present invention provides a technical solution: an emergency stop device 1 includes an oil collecting block 101, a sealing ring 102, a valve stem 103, a solenoid valve 104, an oil chamber conical surface 105 and an oil chamber 106;

[0030] The oil collecting block 101 is provided with channels I, II, III, IV and V. The inlets and outlets of channels I, II, III and V are all provided on two opposite sides of the oil collecting block 101. One port of channel IV is provided on one side of the oil collecting block 101, and the other port is provided on another side perpendicular to the side.

[0031] For clarity, the two ports of channel I are A and B, the two ports of channel II are C and D, the two ports of channel III are E and F, the two ports of channel IV are G and J, and the two ports of channel V are J1 and J2. Channels V and IV are internally connected.

[0032] The oil chamber 106 is arranged inside the oil collecting block 101, channel I and channel III are connected to the oil chamber 106, the valve stem 103 is arranged inside the oil chamber 106, and three sealing rings 102 are provided on the outer side of the valve stem 103. Three oil chamber cone surfaces 105 are provided inside the oil chamber 106, and the three oil chamber cone surfaces 105 are respectively located at channel I, channel II and therebetween. The oil chamber cone surface 105 cooperates with the sealing ring 102, and the other end of the valve stem 103 is connected to the solenoid valve 104. The solenoid valve 104 is installed on one side of the oil collecting block 101, and the input end of the solenoid valve 104 is electrically connected to the output end of the external ECU. After the solenoid valve 104 receives the stop command from the external ECU, it controls the valve stem 103 to move, so that the sealing ring 102 cooperates with the oil chamber cone surface 105 to seal, thereby blocking the fuel and achieving the purpose of stopping.

[0033] An emergency stop system includes an emergency stop device 1, a fuel tank 2, an oil pump 5, a duplex filter 8, a high-pressure oil pump 9, and a fuel injector 10;

[0034] The two ends of the channel 1 in the oil collecting block 101 are connected to the oil outlet of the oil tank 2 and the oil inlet of the oil pump 5 through pipelines respectively;

[0035] The two ends of the channel II in the oil collecting block 101 are connected to the oil inlet end of the duplex filter 8 and the oil outlet end of the oil pump 5 through pipelines respectively;

[0036] The two ends of the channel III in the oil collecting block 101 are connected to the oil outlet of the duplex filter 8 and the oil inlet of the high-pressure oil pump 9 through pipelines respectively;

[0037] The two ends of the channel IV in the oil collecting block 101 are connected to the oil return end of the oil tank 2 and the oil return end of the high-pressure oil pump 9 through pipelines respectively;

[0038] The oil outlet of the high-pressure oil pump 9 is connected to the oil inlets of the multiple injectors 10 respectively. In this embodiment, it is assumed that there are two injectors 10, and the channel V in the oil collecting block 101 is connected to the oil return ports of the two injectors 10 through pipelines.

[0039] According to the external ECU sending instructions to the solenoid valve 14, the operation process is as follows:

[0040] (1) When the diesel engine is operating normally, its working mode is:

[0041] like Figure 1 The fuel in the fuel tank 2 enters channel I of the oil collecting block 101 through port A, enters the oil pump 5 from port B of channel I, the fuel pressurized by the oil pump 5 flows into channel II of the oil collecting block 101 through port C, enters the duplex filter 8 from port D of channel II, the fuel filtered by the duplex filter 8 enters channel III of the oil collecting block 101 through port E, enters the high-pressure fuel pump 9 from port F of channel III, the fuel in the high-pressure fuel pump 9 is delivered to the two injectors 10 for operation, the return fuel of the two injectors 10 enters channel V of the oil collecting block 101 through ports J1 and J2 respectively, the return oil interface of the high-pressure fuel pump 9 enters channel IV of the oil collecting block 101 through port G, the return fuel of the injector 10 and the return fuel of the high-pressure fuel pump 9 flow back to the fuel tank 2 through port J of the oil collecting block 101;

[0042] Among them, a first one-way valve 4 is provided on the connecting pipeline between channel I and the fuel tank 2, a second one-way valve 6 is provided on the connecting pipeline between channel II and the oil pump 5, and a third one-way valve 7 is provided on the connecting pipeline between channel IV and the high-pressure oil pump 9. The function of the first one-way valve 4, the second one-way valve 6 and the third one-way valve 7 is to only allow the fuel in the pipeline to flow to the oil collecting block 101.

[0043] (2) When emergency stop is required, the working mode is:

[0044] like Figure 2 Under the action of the stop signal, the valve stem 103 of the emergency stop device 1 moves, causing the sealing ring 102 to block the channel I and the channel III, so that the A, B, E, and F ports on the oil collecting block 101 are no longer connected, and the C, D ports and the G, and J ports remain connected. The fuel in the pipeline is pumped back by the inertia of the oil pump 5 itself and returns to the fuel tank 2 through the pipeline, preventing the fuel system from continuing to work and achieving the purpose of rapid parking.

[0045] (3) A manual pump 3 is provided on one side of the emergency stop device. The oil outlet of the manual pump 3 is connected to the channel II, and the oil return end of the manual pump 3 is connected to the channel I. When the engine is restarted after emergency stop, its working mode is:

[0046] After the emergency stop, the oil transfer pump 5 sucks out the fuel in the fuel system. There may be oil mist gas in the fuel system due to vacuum extraction. The oil and gas in the system need to be discharged. First, loosen the bleed screw on the duplex filter 8, repeatedly squeeze the manual pump 3 to supply oil until the fuel coming out of the bleed screw does not contain bubbles, and finally tighten the bleed screw.

[0047] Parts of the invention not described in detail are prior art. Although embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention. The scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An emergency parking system, characterized in that: It comprises an emergency stop device (1), a fuel tank (2), a fuel pump (5), a duplex filter (8), a high-pressure fuel pump (9) and a fuel injector (10); The emergency stop device (1) is provided with a channel I, a channel II, a channel III, a channel IV and a channel V respectively; The two ends of the channel I are connected to the oil outlet of the oil tank (2) and the oil inlet of the oil pump (5) through pipelines respectively; The two ends of the channel II are connected to the oil inlet end of the duplex filter (8) and the oil outlet end of the oil pump (5) through pipelines respectively; The two ends of the channel III are connected to the oil outlet of the duplex filter (8) and the oil inlet of the high-pressure oil pump (9) through pipelines respectively; The two ends of the channel IV are respectively connected to the oil return end of the oil tank (2) and the oil return end of the high-pressure oil pump (9) through pipelines; The oil outlet end of the high-pressure oil pump (9) is respectively connected to the oil inlets of a plurality of oil injectors (10), and the channel V is respectively connected to the oil return ports of a corresponding number of oil injectors (10) through pipelines, and the channel V and channel IV are internally connected.

2. An emergency parking system according to claim 1, characterized in that: When the diesel engine is operating normally, its working mode is as follows: the fuel in the fuel tank (2) enters the fuel pump (5) through the channel I of the emergency stop device (1), the fuel pressurized by the fuel pump (5) enters the duplex filter (8) through the channel II of the emergency stop device (1), the fuel filtered by the duplex filter (8) enters the high-pressure fuel pump (9) through the channel III of the emergency stop device (1), the fuel in the high-pressure fuel pump (9) is delivered to each injector (10) for operation, the fuel returned from each injector (10) enters the channel V, and is merged into the return oil channel IV of the high-pressure fuel pump (9), and flows back to the fuel tank (2) together; When emergency stop is required, its working mode is as follows: under the action of the stop signal, channel I and channel III in the emergency stop device (1) are no longer connected, channel II, channel IV and channel V are connected, and the oil pump is used to pump back and return the oil to the fuel tank (2) through the pipeline to prevent the fuel system from continuing to work.

3. An emergency parking system according to claim 1, characterized in that: A first one-way valve (4) is provided on the connecting pipeline between the channel I and the oil tank (2), a second one-way valve (6) is provided on the connecting pipeline between the channel II and the oil delivery pump (5), and a third one-way valve (7) is provided on the connecting pipeline between the channel IV and the high-pressure oil pump (9).

4. An emergency parking system according to claim 1, characterized in that: A manual pump (3) is provided on one side of the emergency stop device (1), the oil outlet end of the manual pump (3) is communicated with the channel II, and the oil return end of the manual pump (3) is communicated with the channel I.

5. The emergency parking system according to claim 1, characterized in that: The emergency stop device (1) comprises an oil collecting block (101), a sealing ring (102), a valve stem (103), a solenoid valve (104), an oil chamber conical surface (105) and an oil chamber (106); The channel I, channel II, channel III, channel IV and channel V are all arranged in the oil collecting block (101); The oil chamber (106) is arranged inside the oil collecting block (101), the channel I and the channel III are connected to the oil chamber (106), the valve stem (103) is arranged inside the oil chamber (106), the outer side surface of the valve stem (103) is provided with three sealing rings (102), the oil chamber (106) is provided with three oil chamber conical surfaces (105), the three oil chamber conical surfaces (105) are respectively located at channel I, channel II and therebetween, the oil chamber conical surfaces (105) are matched with the sealing ring (102), the other end of the valve stem (103) is connected to the electromagnetic valve (104), the electromagnetic valve (104) is installed on one side of the oil collecting block (101), and the input end of the electromagnetic valve (104) is electrically connected to the output end of an external ECU.

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