CN2342111Y

CN2342111Y - Oil cut-off magnetic valve of diesel engine

Info

Publication number: CN2342111Y
Application number: CN 98223055
Authority: CN
Inventors: 叶适彬; 叶适君; 王强飞
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-01-13
Filing date: 1998-01-13
Publication date: 1999-10-06
Anticipated expiration: 2008-01-13

Abstract

The utility model relates to an oil cut-off magnetic valve of a diesel engine, which comprises a coil winding and a piston assembly. The coil winding comprises a high current pull-in coil and a low current holding coil which are mutually paralleled, a piston is arranged in a winding core and the head part of the piston is supported by a return spring, an electric switch of the diesel motor can be a main switch of the pull-in coil and the holding coil, the piston can directly act on a controlling toothed bar of the oil valve, and can also control the existing oil cut-off pull rod. The utility model achieves the aim of automatic flameout by that the movement of the piston drives links, which causes diesel locomotives automatic flameout as gasoline locomotives.

Description

Oil cut-off solenoid valve for diesel engine

The utility model relates to a kind of motorized vehicles and vessels and the engineering machinery flame-out solenoid valve of diesel engine oil-break.

Current also have many motorized vehicles and vessels such as tractor to adopt diesel engine as power source, but because diesel engine adopts the ignition by compression mode, diesel engine is flame-out not only will turn off electric switch so make, also must cut off oil pump feed, the method that adopts has steel wire plug-type at present, pressurized air controlling type and solenoid valve push button, all need additionally to do the flame-out action of pull bar oil-break, particularly use the most general plug-type needs of steel wire always with pulling until engine misses, it is very inconvenient to operate, and can not only need the switch electric switch just can light a fire automatically as petrol engine, flame-out.

The purpose of this utility model just is in order to provide a kind of switch that utilizes can control the flame-out solenoid valve of diesel engine oil-break automatically at above-mentioned prior art present situation.

Design proposal of the present utility model is: oil cut-off solenoid valve for diesel engine mainly comprises coil winding and piston apparatus, coil winding comprises a heavy current hauling-eye parallel with one another and a light current hold-in winding, one piston is positioned at coil core and its head is supported by a Returnning spring, and the switch of diesel engine is then as the main switch of described hauling-eye and hold-in winding.

Described hauling-eye can be controlled by the time relay on the diesel engine, but be more preferably by the proprietary automatic change-over control of the utility model: automatic change-over is positioned at the afterbody of coil, comprise push rod, be fixed on static touching plate on the base, movable touching plate and the Returnning spring thereof relative with static touching plate, the push rod head stretches into the coil core afterbody, its afterbody and movable touching plate offset, and described static touching plate and movable touching plate are to being connected on the described hauling-eye loop.

Described piston can directly act on the control ratch of fuel tap, also can control existing oil-break pull bar.

When the diesel engine electric switch is opened, hauling-eye and hold-in winding are switched on simultaneously, hauling-eye produces maximum magnetic force inspiration piston, opens oil circuit under the heavy current state, hold-in winding continues to keep piston to be in fallback state under the light current effect, make oil circuit keep unimpeded, hauling-eye cuts off the power supply automatically simultaneously; When electric switch cut out, hold-in winding also cut off the power supply, and piston just protracts, closes oil circuit under its action of reset spring.

Dual coil electromagnetic valve in parallel that the utility model is exclusive and automatic change-over structure thereof make diesel engine possess the auto extinguishing function the same with petrol engine by piston motion, and flame-out of shutdown need be closed switch and be got final product, and is easy to use, laborsaving.

Description of drawings:

Fig. 1 is the most preferred embodiment structural representation of the utility model by fuel tap fuel-flow control ratch oil-break.

Fig. 2 directly drives the example structure schematic representation of oil-break control pull rod for the utility model.

Fig. 3 is for being applied to output transmission damper mechanism of the present utility model.

Fig. 4 is a kind of simplified embodiment structural representation of the present utility model.

Fig. 5 is circuit theory diagrams of the present utility model.

Fig. 6 is the driving mechanism structural representation between fuel tap fuel-flow control ratch and the oil-break control pull rod in the existing diesel engine.

Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.

As Fig. 1, Figure 5 shows that the utility model passes through the most preferred embodiment of fuel tap 21 fuel-flow control ratch 22 oil-breaks, comprises coil winding, piston apparatus and automatic change-over SJ;

Coil winding comprises heavy current hauling-eye L1 parallel with one another and the light current hold-in winding L2 that is arranged in the housing, be by coil 10 hauling-eyes and hold-in winding shown in Fig. 1) on winding support 11, constitute, the front end of winding support 11 is provided with front cover 13, the rear end is provided with rear end cover 8; The switch K of diesel engine is promptly as the main switch of described hauling-eye L1 and hold-in winding L2.

Piston 12 is positioned at coil 10 in-cores and its head is overhanging and be supported on guide 14 by a Returnning spring 15, guide 14 rear portions are threaded with above-mentioned front cover 13, anterior and fuel tap limit cigarette termination 23 (prior art be threaded herein an end cap excessive to limit oil smoke) is threaded, and being positioned at its overhanging fuel-flow control ratch 22, then to stretch into guide 14 relative with described piston 12 heads;

Automatic change-over is positioned at the afterbody of coil winding, comprise push rod 7 in housing 1 and the housing, be fixed on static touching plate 5 on the base, movable touching plate 4 and the Returnning spring 3 thereof relative with static touching plate 5, base 6 leans against on the above-mentioned rear end cover 8, push rod 7 heads pass rear end cover 8 and stretch into coil 10 core afterbodys, its afterbody and movable touching plate 4 offset, Returnning spring 3 is enclosed within on its guide rod, one end withstands on the movable touching plate 4, the other end withstands on housing 1 afterbody, 4 pairs of described static touching plate 5 and movable touching plates are connected on the above-mentioned hauling-eye L1 loop, as shown in Figure 5 as switch S J; 2 is wiring terminal among Fig. 1.

During work as shown in Figure 5, when electric switch K opens, hauling-eye L1 and hold-in winding L2 switch on simultaneously, hauling-eye L1 produces maximum magnetic force inspiration piston 12, opens oil circuit under the heavy current state, hold-in winding L2 continues to keep piston 12 to be in fallback state under the light current effect, fuel-flow control ratch 22 is in the overhanging state of nature, it is unimpeded that oil circuit keeps, meanwhile push rod 7 is by piston 12 back pushing tow Kaiyuan elder generation and static touching plate 5 contacted movable touching plates 4, also be that automatic change-over SJ disconnects, hauling-eye L1 cuts off the power supply automatically; And when electric switch K closes; hold-in winding L2 also cuts off the power supply, and piston 12 just protracts under its Returnning spring 15 effects, and the fuel-flow control ratch is headed in the fuel tap 21; close oil circuit by driving mechanism (Fig. 6 has shown such driving mechanism) pulling oil-break control pull rod, shut down.

As Fig. 2, Figure 5 shows that the utility model directly drives the embodiment of oil-break control pull rod, its coil winding, the structure of automatic change-over and embodiment-consistent, it is stretched in piston crown outside the coil winding and is supported by a Returnning spring 16 and be positioned at dustproof leather bag 17, one connecting rod 18 passes leather bag 17 front ends and is connected with piston 12 head threads, this connecting rod 18 can directly link to each other with oil-break control pull rod or its driving mechanism, but the damper mechanism that is more preferably by as shown in Figure 3 links to each other with oil-break control pull rod or its driving mechanism again: described connecting rod 18 anterior cover upper springs 32 also are limited in the housing 31, one push rod, 33 afterbodys are limited in housing 31 heads and with connecting rod 18 hemispheric heads and push up mutually, and push rod 33 heads remove to connect oil-break control pull rod or its driving mechanism by a universal ball end 34 again.

As shown in Figure 4, be a kind of simplified embodiment of the present utility model, saved the automatic change-over in the previous embodiment, with the time relay of diesel engine self as the switch S J among Fig. 5, the remaining part structure is consistent with above-mentioned two embodiments, and the wiring 2 that institute's difference has been to have more a hauling-eye L1 is used for connecting the above-mentioned time relay.

Claims

1. oil cut-off solenoid valve for diesel engine, comprise coil winding and piston apparatus, it is characterized in that: coil winding comprises a heavy current hauling-eye parallel with one another and a light current hold-in winding, one piston is positioned at coil core and its head is supported by a Returnning spring, and the switch of diesel engine is then as the main switch of described hauling-eye and hold-in winding.

2. oil cut-off solenoid valve for diesel engine as claimed in claim 1, it is characterized in that also comprising that one is positioned at the automatic change-over of coil afterbody, comprise push rod, be fixed on static touching plate on the base, movable touching plate and the Returnning spring thereof relative with static touching plate, the push rod head stretches into the coil core afterbody, its afterbody and movable touching plate offset, and described static touching plate and movable touching plate are to being connected on the described hauling-eye loop.

3. oil cut-off solenoid valve for diesel engine as claimed in claim 1 or 2 is characterized in that the described piston crown that is supported by Returnning spring stretches in outside the coil winding and be positioned at a dustproof leather bag, and a connecting rod passes the leather bag front end and is threaded with piston crown.

4. oil cut-off solenoid valve for diesel engine as claimed in claim 1 or 2 is characterized in that described connecting rod anterior cover upper spring and is limited in the housing, and it is inner and push up mutually with the hemispheric head of connecting rod that a push rod afterbody is limited in housing head.