KR20020052338A - A Eletric Valve of Flash Short Type - Google Patents

Abstract

PURPOSE: An instantaneous electric current application type electric valve is provided to avoid the discharge of a battery and to improve the durability of an electric valve by instantaneously applying electric currents to the valve via an electric motor. CONSTITUTION: A transmission section(3) and a non-transmission section(4) are formed on the outer face of a body having a rotating switch(1). Pistons(8) are installed in a first valve and a second valve. The pistons are operated by a motor(7). A clamp(10) is installed on a rotating shaft(9) of the piston to restrain the rotation over 90 angular degrees of the piston. According to the transmission section and the non-transmission section, the rotational direction of the piston is controlled. If the rotating switch is placed in the non-transmission section, electric currents are blocked up.

Description

A eletric valve of flash short type

The present invention relates to a valve used in opening and closing a door of a medium and large bus, and more particularly, to an instantaneous energizing electric valve which can prevent battery discharge while improving durability by operating the valve by energizing it with an electric motor. .

Medium and large buses are usually equipped with an automatic door device for the convenience of passengers and drivers, the pneumatic cylinder is mainly used as a device for opening and closing the automatic door device.

On the other hand, as the pneumatic control valve used to control the pneumatic cylinder, a magnetic valve that can easily control the flow of current is used a lot, and the system currently mounted on the bus is usually used to control the cylinder with two magnetic valves have.

Figure 6 shows opening the door with a magnetic valve according to the conventional use example. The system uses three-way valves and two types of magnetic valves are used.

That is, the first valve 33 and the second valve 34 are connected to the ports 31 and 32 formed in the door cylinder 30, respectively, and the first valve 33 and the second valve 34 are doors. Electrically connected to the switch 35 and at the same time connected to the air tank 36 in series via a pipe 37, while the first valve 33 is connected to the C port and the S port when energized, The second valve 34 is connected to the S port and the E port at the time of energization.

Therefore, when the door switch 35 is turned on and current flows through the respective valves, the air pressure introduced from the air tank 36 flows into the port 31 through the C port and the S port of the first valve 33 so that the piston rod ( 38) is moved to the left in the figure, i.e., in the contracting direction, to open the door. In this case, the second valve 34 disconnects the S port and the C port, thereby blocking the air pressure.

On the contrary, when the door switch 35 is turned off, as shown in FIG. 7, the C port and the E port of the first valve 33 are connected, and the second valve 34 is connected to the C port and the S port. Air pressure introduced from 36 is introduced into the second valve to move the piston rod 38 to the right side, that is, in the direction of extension in the drawing to close the door.

However, the valve operated in the above-described structure is not only a cause of battery discharge because the current is continuously flowed to the valve if the door is kept in the open state for a long time, as well as switching manually from the closed state when the door is open for a long time. It is inconvenient to do it.

In addition, if the current continuously flowing for a long time, there is a drawback that the heat generated in the magnetic will adversely affect the durability of the valve.

Accordingly, the present invention has been invented to solve the above drawbacks, the instantaneous energization of the valve by operating the electric motor to improve the durability while improving the durability while preventing the discharge of the battery to provide an instantaneous electrical valve There is this.

The present invention for achieving the above object, the rotation direction of the piston is controlled through the rotary switch is formed on the outer circumferential surface of the body of the energized section and the non-conducted section repeatedly.

1a, b, c, d is a schematic diagram for explaining the operation of the rotary switch according to the invention,

2 is a connection diagram of a rotary switch and an electric valve according to the present invention;

3 is an electrical wiring diagram of a rotary switch according to the present invention;

4 is a configuration diagram showing the opening of the door by the electric valve according to the invention,

5 is a block diagram showing the closing of the door with the electric valve according to the invention,

6 is a block diagram showing the opening of the door with a magnetic valve according to the conventional use example,

7 is a block diagram showing the closing of the door to the magnetic valve according to the conventional use example,

<Description of Symbols for Main Parts of Drawings>

1 --- rotary switch, 2 --- body,

3 --- energized section, 4 --- non-active section,

5 --- 1st valve, 6 --- 2nd valve,

7 --- motor, 8 --- piston,

9 --- rotary shaft, 10 --- brace,

30 --- door cylinder, 38 --- piston rod,

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a schematic diagram for explaining the operation of the rotary switch according to the present invention, the same reference numerals are shown in the same parts as the conventional use example, the present invention, as shown in the figure, the rotary switch 1 is An energization section 3 is formed on the outer circumferential surface of the installed body 2 in the direction of 180 degrees, and a non-energization section 4 is formed in the remaining sections except for the energization section 3, and the rotary switch 1 is (a). When it is in the section, the current does not flow through the first valve 5 and the second valve 6, and the rotary switch 1 is rotated so that the motor 7 rotates when passing the section (b). In the section (c), no current flows, and in section (d), current flows in the opposite direction as in the section (b), so that the motor 7 rotates in the opposite direction.

And, Figure 2 shows the connection of the rotary switch 1, the first valve 5 and the second valve 6, the first valve 5 and the second valve 6, respectively, the piston (8) This piston 8 is adapted to be operated by the motor 7 via the rotary switch 1. When the switch 1 is rotated, the current flows in the reverse direction, and the latching shaft 10 is installed on the rotation shaft 9 of the piston 8 to prevent the piston 8 from rotating more than 90 degrees. have.

In addition, the + switch and-power are always supplied to the rotary switch 1, and the emergency charging battery 11 is electrically connected to these power sources so that they can be used even in the event of a power failure.

Next, the operation of the electric valve according to the present invention will be described.

When the rotary switch 1 rotates, when the current passes through the energization section 3, the current is simultaneously applied to the first valve 5 and the second valve 6, and the air pressure flowing from the air tank 36 is reduced. As the air flows into the door cylinder 30 through the first valve 5 and the air in the door cylinder 30 is exhausted through the second valve 6, the piston rod 38 is leftward in the drawing, that is, the door open. When the rotary switch 1 is located in the section of the non-conduction section 4, the supplied current is cut off and the door is kept open (see FIG. 4).

In addition, if the rotary switch 1 is rotated once more in the same direction, the current flows in the opposite direction, which is the opposite of the above. Thus, the piston rod 38 moves in the right direction, that is, the door close direction in the drawing, and rotates. When the switch 1 is located in the section of the non-conduction section 4, the supplied current is interrupted and the state in which the door is closed is maintained as it is (see FIG. 5).

As described above, according to the present invention, there is an advantage that the battery can be prevented from being discharged while improving durability by operating the momentary energization of the valve with an electric motor.

Claims (2)

Instantaneous energized electric valve to control the rotation direction of the piston (8) via the rotary switch (1) in which the energization section (3) and non-electricity section (4) is formed on the outer circumferential surface of the body (2) 2. The momentary energizing electric valve according to claim 1, characterized in that the rotation angle is limited by means of the catch (10) formed on the rotating shaft (9).