CN108439274B - Electric control pressure control air inlet cutting device, operation method thereof and forklift - Google Patents
Electric control pressure control air inlet cutting device, operation method thereof and forklift Download PDFInfo
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- CN108439274B CN108439274B CN201810305329.7A CN201810305329A CN108439274B CN 108439274 B CN108439274 B CN 108439274B CN 201810305329 A CN201810305329 A CN 201810305329A CN 108439274 B CN108439274 B CN 108439274B
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- valve
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- air inlet
- oil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/0759—Details of operating station, e.g. seats, levers, operator platforms, cabin suspension
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07504—Accessories, e.g. for towing, charging, locking
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention relates to an electric control pressure control air inlet cutting device, an operation method thereof and a forklift. The invention aims to provide an electric control pressure control air inlet cutting device with simple structure, good reliability and high reaction speed, an operation method thereof and a forklift. The technical scheme of the invention is as follows: an electrically controlled pressure controlled intake air shut-off device, comprising: an intake air shut-off valve; the air inlet cut-off valve handle is connected with the air inlet cut-off valve through a pull wire and synchronously acts with the air inlet cut-off valve to control the opening and closing of the air inlet cut-off valve; the oil pressure mechanism is communicated with the air inlet cut-off valve and is used for maintaining the opening state of the air inlet cut-off valve through the pressure of hydraulic oil in the oil pressure mechanism; the oil pressure mechanism has a pressure cutoff solenoid valve that controls the pressure of hydraulic oil that the oil pressure mechanism delivers to the intake cutoff valve. The invention is suitable for explosion-proof internal combustion forklifts and other explosion-proof internal combustion engineering machinery vehicles.
Description
Technical Field
The invention relates to an electric control pressure control air inlet cutting device, an operation method thereof and a forklift. The method is suitable for explosion-proof internal combustion forklifts and other explosion-proof internal combustion engineering machinery vehicles.
Background
The explosion-proof forklift takes the explosion-proof engine as a power system, and the explosion-proof engine is required to have an air inlet cutting function, so that the air inlet of the explosion-proof engine is cut off when the overspeed runaway phenomenon of the explosion-proof engine is stopped, and the explosion-proof engine is stopped.
At present, the air inlet cutting devices on the domestic and foreign explosion-proof forklifts are all mechanical control type air inlet cutting devices, so that the problems that the structure is complex and the air inlet is easily cut off by mechanical mechanisms due to sudden impact of the whole forklift exist. When an emergency situation occurs and an air inlet channel needs to be cut off in an emergency way, a driver is required to judge and cut off air inlet manually, the cut-off is not timely, the explosion-proof forklift is used in a dangerous environment, when an overspeed phenomenon occurs in the explosion-proof whole car, the temperature and the speed of the whole car are quickly increased and lose control, if the operation is not timely, the temperature of the whole car is quickly over the limit temperature, the speed is out of control, an impact accident is easily caused, or sparks are generated by impact, and a combustible gas mixture and combustible dust are ignited.
Disclosure of Invention
The invention aims to solve the technical problems that: aiming at the problems, the electric control pressure control air inlet cutting device with simple structure, good reliability and high reaction speed, and the operation method thereof, and the forklift are provided.
The technical scheme adopted by the invention is as follows: an electrically controlled pressure controlled intake air shut-off device, comprising:
an intake air shut-off valve;
the air inlet cut-off valve handle is connected with the air inlet cut-off valve through a pull wire and synchronously acts with the air inlet cut-off valve to control the opening and closing of the air inlet cut-off valve;
the oil pressure mechanism is communicated with the air inlet cut-off valve and is used for maintaining the opening state of the air inlet cut-off valve through the pressure of hydraulic oil in the oil pressure mechanism;
the oil pressure mechanism has a pressure cutoff solenoid valve that controls the pressure of hydraulic oil that the oil pressure mechanism delivers to the intake cutoff valve.
The oil pressure mechanism is provided with a three-way joint, a joint I of the three-way joint is connected with an oil pressure source through an oil pipe I, a joint II of the three-way joint is connected with the air inlet cut-off valve through an oil pipe II, and a joint III of the three-way joint is connected with an oil tank through the pressure cut-off electromagnetic valve and the oil pipe III.
The pressure cut-off solenoid valve adopts a normally open solenoid valve.
An operation method of the electric control pressure control air inlet cutting device is characterized in that:
supplying power to the pressure cut-off electromagnetic valve, so that pressure energy generated by an oil pressure source in the oil pressure mechanism is transmitted to the air inlet cut-off valve;
operating an air inlet cut-off valve handle to control the air inlet cut-off valve to be opened through a pull wire, and keeping the opened state;
the oil pressure source in the oil pressure mechanism generates pressure, the pressure is transmitted to the air inlet cut-off valve, the opening state of the air inlet cut-off valve is maintained through the pressure, and at the moment, the handle of the air inlet cut-off valve is released;
the power supply to the pressure cut-off solenoid valve is stopped, the pressure transmitted from the hydraulic mechanism to the intake cut-off valve is set to 0, the intake cut-off valve is returned to the closed state, and the intake cut-off valve handle, which operates in synchronization with the intake cut-off valve, is returned to the initial position.
A forklift truck, characterized in that: the electric control pressure control air inlet cutting device is provided.
After the key switch of the forklift is electrified, the pressure cut-off electromagnetic valve in the electric control pressure control air inlet cut-off device is powered;
after the whole forklift is started, the electric control pressure controls an oil pressure source in an air inlet cutting device to generate pressure;
after the forklift key is closed, the electric control pressure controls the pressure cut-off electromagnetic valve in the air inlet cut-off device to cut off power.
And an air inlet cut-off valve handle in the electric control pressure control air inlet cut-off device is arranged on the leg guard of the overhead guard of the forklift.
The beneficial effects of the invention are as follows: the pressure cut-off solenoid valve controls pressure and the pressure control air inlet cut-off valve, so that intelligent control air inlet cut-off can be realized by combining a control system. The invention maintains the opening state of the air inlet cut-off valve by pressure, thereby judging whether the parts generating pressure work normally or not by the opening state of the air inlet cut-off valve. The air inlet cutting-off function is more reliable, more timely and more intelligent, and the whole vehicle is safer.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment.
Detailed Description
The embodiment is a forklift, which is provided with an electric control pressure control air inlet cutting device, wherein the electric control pressure control air inlet cutting device comprises an air inlet cutting valve 4, an air inlet cutting valve handle 1 and an oil pressure mechanism.
The air inlet cut-off valve handle 1 is fixed on the overhead guard leg of the forklift through bolts, and the air inlet cut-off valve handle 1 is connected with a control rocker arm of the air inlet cut-off valve 4 through a stay wire matched pin and synchronously acts with the air inlet cut-off valve 4.
The hydraulic mechanism in this embodiment includes three way connection 7 and pressure cut-off solenoid valve 9 (normally open solenoid valve), three way connection 7 has three joints of joint I, II, III, wherein connect I through oil pipe I3 and connect the oil pressure source, connect II through oil pipe II 6 cooperation joint spare 5 connect the air inlet trip valve 4, pressure cut-off solenoid valve 9 both ends pass through threaded connection joint spare 5, the joint III of three way connection 7 passes through the thread tightening on the joint spare 5 of pressure cut-off solenoid valve 9 one end, the joint spare 5 of the other end of pressure cut-off solenoid valve 9 passes through the screw thread and is connected with the one end of oil pipe III 10, the other end of oil pipe III 10 is connected to the oil tank.
In the embodiment, after a key switch of the forklift is electrified, the pressure cut-off electromagnetic valve 9 is electrified and closed; after the whole vehicle is started, the electric control pressure controls an oil pressure source in the air inlet cutting device to generate pressure; after the forklift key is closed, the electric control pressure controls the pressure cut-off electromagnetic valve 9 in the air inlet cut-off device to cut off power and return to the open state.
The operation method of this embodiment is as follows:
before the whole vehicle starts, the air inlet cut-off valve 4 is closed, and the pressure cut-off electromagnetic valve 9 is opened.
When the whole vehicle needs to be started, after the key switch is electrified, the pressure cut-off electromagnetic valve 9 is electrified to be closed, and meanwhile, the air inlet cut-off valve handle 1 is manually operated to control the air inlet cut-off valve 4 through the stay wire 2 to control the rocker arm to open the air inlet cut-off valve 4 and keep the same (by keeping the handle position, the opening state of the air inlet cut-off valve 4 is kept).
The whole vehicle is started, an oil pressure source (a gearbox, an engine and the like) generates pressure after the whole vehicle is started, the pressure is conducted to the air inlet cut-off valve 4 through the oil pipe I3, the three-way joint 7 and the oil pipe II 6, the opening state of the air inlet cut-off valve 4 is maintained through the pressure, the air inlet cut-off valve handle 1 is released at the moment, the position of the air inlet cut-off valve handle 1 in the opening state of the air inlet cut-off valve 4 is also maintained, and the whole vehicle runs normally.
When flameout occurs, the key switch is closed, the pressure cut-off electromagnetic valve 9 is powered off and returns to an open state, the oil pipe I3 is connected with the oil pipe III 10, the pressure in the oil tank is 0, therefore, the pressure in the oil pipe II 6 is also 0, the air inlet cut-off valve 4 returns to a closed state, the air inlet cut-off valve 4 returns to the closed state under the action of the spring force of the valve spring, and the air inlet cut-off valve 4 is closed, so that the air inlet of the engine is cut off. At this time, the intake cut-off valve handle 1 connected to the control rocker arm of the intake cut-off valve 4 via the wire returns to the initial position under the action of the wire.
In this embodiment, the pressure cutoff solenoid valve 9 may also be combined with a control system to achieve intelligent control of intake cutoff.
Claims (7)
1. An electrically controlled pressure controlled intake air shut-off device, comprising:
an intake shutoff valve (4);
an air inlet cut-off valve handle (1) which is connected with the air inlet cut-off valve (4) through a pull wire (2) and synchronously acts with the air inlet cut-off valve (4) to control the opening and closing of the air inlet cut-off valve (4);
an oil pressure mechanism which is communicated with the air inlet cut-off valve (4) and is used for maintaining the opening state of the air inlet cut-off valve (4) through the pressure of hydraulic oil in the oil pressure mechanism;
the hydraulic mechanism has a pressure cut-off solenoid valve (9) that controls the pressure of hydraulic oil supplied from the hydraulic mechanism to the intake cut-off valve (4).
2. The electrically controlled pressure controlled intake air shut-off device according to claim 1, wherein: the oil pressure mechanism is provided with a three-way joint (7), a joint I of the three-way joint is connected with an oil pressure source through an oil pipe I (3), a joint II of the three-way joint (7) is connected with the air inlet cut-off valve (4) through an oil pipe II (6), and a joint III of the three-way joint (7) is connected with an oil tank through the pressure cut-off electromagnetic valve (9) and the oil pipe III (10).
3. The electrically controlled pressure controlled intake air shut-off device according to claim 2, wherein: the pressure cut-off electromagnetic valve (9) adopts a normally open electromagnetic valve.
4. A method of operating an electronically controlled pressure controlled inlet shutoff device as claimed in any one of claims 1 to 3, wherein:
supplying power to the pressure cut-off electromagnetic valve (9) so that pressure energy generated by an oil pipe III (10) in the oil pressure mechanism is transmitted to the air inlet cut-off valve (4);
the air inlet cut-off valve handle (1) is operated to control the air inlet cut-off valve (4) to be opened through the stay wire (2), and the opened state is kept;
an oil pipe III (10) in the oil pressure mechanism generates pressure and transmits the pressure to an air inlet cut-off valve (4), and the air inlet cut-off valve (4) is kept in an open state by the pressure, and at the moment, an air inlet cut-off valve handle (1) is released;
the power supply to the pressure cut-off solenoid valve (9) is stopped, the pressure transmitted from the hydraulic mechanism to the air intake cut-off valve (4) is set to 0, the air intake cut-off valve (4) returns to the closed state, and the air intake cut-off valve handle (1) which operates in synchronization with the air intake cut-off valve (4) returns to the initial position.
5. A forklift truck, characterized in that: an electrically controlled pressure controlled intake air shut-off device according to any one of claims 1 to 3.
6. The forklift of claim 5, wherein:
after the key switch of the forklift is electrified, the pressure cut-off electromagnetic valve (9) in the electric control pressure control air inlet cut-off device is powered;
after the whole forklift is started, the electric control pressure controls an oil pipe III (10) in the air inlet cutting device to generate pressure;
after the forklift key is closed, the electric control pressure controls the pressure cut-off electromagnetic valve (9) in the air inlet cut-off device to cut off power.
7. The forklift of claim 5 or 6, wherein: an air inlet cut-off valve handle (1) in the electric control pressure control air inlet cut-off device is arranged on a top protection frame leg guard of a forklift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810305329.7A CN108439274B (en) | 2018-04-08 | 2018-04-08 | Electric control pressure control air inlet cutting device, operation method thereof and forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810305329.7A CN108439274B (en) | 2018-04-08 | 2018-04-08 | Electric control pressure control air inlet cutting device, operation method thereof and forklift |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108439274A CN108439274A (en) | 2018-08-24 |
| CN108439274B true CN108439274B (en) | 2023-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810305329.7A Active CN108439274B (en) | 2018-04-08 | 2018-04-08 | Electric control pressure control air inlet cutting device, operation method thereof and forklift |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1133342A (en) * | 1980-03-28 | 1982-10-12 | Laszlo Tamas | Engine cylinder cutout system and control therefor |
| JPH08159107A (en) * | 1994-12-08 | 1996-06-18 | Mikasa Sangyo Kk | Automatic control device for road roller |
| NO330016B1 (en) * | 2009-04-22 | 2011-02-07 | Tor Henrik Vik | Energy recovery |
| CN105347257A (en) * | 2015-11-27 | 2016-02-24 | 衡阳合力工业车辆有限公司 | Explosion-proof diesel fork lift truck |
| CN208700497U (en) * | 2018-04-08 | 2019-04-05 | 杭叉集团股份有限公司 | Electrohydraulic pressure control controls air inlet disconnecting device and fork truck |
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2018
- 2018-04-08 CN CN201810305329.7A patent/CN108439274B/en active Active
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| CN108439274A (en) | 2018-08-24 |
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