JP2889808B2 - Control device for bottom valve in tank lorry - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in the field of a control device for a bottom valve of a tank lorry which serves both as a bottom valve and an emergency valve of a tank lorry.

[0002]

2. Description of the Related Art Conventional bottom valves and emergency valves are described in Japanese Utility Model Publication No. 55-3.
As shown in No. 3994, the bottom valve 4 is opened and closed by operating the handle 3 at the top of the tank 1, and the emergency valve 6 is opened and closed from the ground behind the tank 1. The lever 11 opens and closes.

[0003]

The above structure requires two valves, a bottom valve and an emergency valve, which increases the cost. Therefore, an object of the present invention is to reduce the cost by using a single valve by using both a bottom valve and an emergency valve.

[0004]

According to the present invention, a bottom valve for opening and closing a discharge port at the bottom of a tank and a handle at the top of the tank are connected by a connecting member. In a tank lorry in which a bottom valve is raised and lowered to open and close a discharge port, a split valve for urging the bottom valve and a connecting member in a direction orthogonal to the connecting member.
The ball into the circumferential groove formed in the connecting member
And a connection means for releasing the engagement by the action of a constant load, a first arm connected to the bottom valve, and an emergency lever connected to an emergency lever to the valve box below the discharge port via a transmission member. Two arms are provided, and the first arm and the second arm are provided.
Connect the arm with a play part with a long hole and a pin,
The play portion allows the bottom valve to move up and down and when the outlet is opened by raising the bottom valve, the emergency lever is operated to release the connecting means and lower the bottom valve to close the outlet. It is characterized by becoming.

[0005]

First, when used as a bottom valve, when the handle at the top of the tank is rotated, the bottom valve rises via the connecting member to open the discharge port. At this time, the connection between the bottom valve and the connecting member is not released because only a load smaller than the predetermined load acts on the connecting means. In addition, the second arm has a play portion and the first arm
Since the arm is allowed to move up and down, it does not rotate and the emergency lever remains as it is. Next, when used as an emergency valve, when the emergency lever is operated, a load larger than a certain load acts on the connecting means via the transmission member, the second arm, the first arm, and the bottom valve, and the bottom valve and the connecting member are connected. Is disconnected and the bottom valve is lowered to close the outlet.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a tank mounted on a vehicle body and containing a liquid such as gasoline or kerosene, and a discharge port 2 is provided at the bottom of the tank 1. 3 is the outlet 2
The bottom valve 3 is included in a valve body 5 provided above the discharge port 2 to abut the valve seat 4 to close the discharge port 2.
The bottom valve 3 is connected to a handle 6 provided above the tank 1 via a connecting member 7. A threaded portion 8 screwed to the valve body 5 is provided on a part of the connecting member 7.
Up and down.

Next, as shown in detail in FIG. 3, reference numeral 9 denotes a first arm rotatably supported at a lower portion of the bottom valve 3, and the first arm 9 has a long hole 10 formed therein. . Reference numeral 11 denotes a second arm rotatably supported by a shaft 13 inside a valve box 12 provided at a lower portion of the discharge port 2. A pin 14 provided on the second arm 11 is placed above the long hole 10 of the first arm 9. When the bottom valve 3 rises and the discharge port 2 is opened, the pin 14
As shown in the figure, the lower end of the long hole 10 is engaged. The slot 10 and the pin 14 constitute a play portion 23. A third arm 15 is provided on the shaft 13 outside the valve box 12, and the third arm 15 is provided behind the tank 1 and is connected to an emergency lever 16 which can be operated from the ground by a transmission member 17.

The bottom valve 3 and the connecting member 7 are connected by connecting means 18 as shown in detail in FIG.
Is a spring 2 whose resilience is adjusted by nuts 19
The balls 21, 21 pressed by 0, 20 are engaged with the circumferential groove 22 of the connecting member 7, and the balls 21, 21
The engagement between the shaft and the circumferential groove 22 is not released by rotating the handle 6, but is released by operating the emergency lever 16.

The operation of the present invention having the above-described structure will now be described. First, when used as a bottom valve for discharging the liquid in the tank 1, when the handle 6 at the top of the tank 1 is rotated, the screw portion 8 of the connecting member 7 rises above the valve body 5, and the bottom valve 3 rises. Then, the discharge port 2 is opened. Then, the liquid in the tank 1 is discharged from the discharge port 2 through the valve box 12. At this time, springs 20, 2
Since only a load smaller than 0 is applied, the connection between the bottom valve 3 and the connecting member 7 is not released. Second arm 1
While the pin 14 of the first arm 9 remains as it is, the elongated hole 10 of the first arm 9 rises and the pin 14 is merely located at the lower end of the elongated hole 10, so that the second arm 11 does not rotate and
Is as it is.

When the emergency lever is pulled rearward when the liquid is discharged as an emergency valve for urgently stopping the discharge due to a fire or the like, the emergency valve is pulled through the transmission member 17 and the third arm 15. The two arms 11 rotate downward. Then, the pin 14 of the second arm 11 is inserted into the long hole 1 of the first arm 9.
By engaging with the lower end of the zero, the bottom valve 3 receives a load downward via the first arm 9. Then, the connecting means 18
, A load greater than the pressing force of the springs 20 is applied to the bottom valve 3.
The connection between the and the connecting member 7 is released, the bottom valve 3 moves down to close the discharge port 2, and the discharge of the liquid is stopped.

[0011]

As described above, the present invention can be used as a bottom valve by operating the bottom valve with a handle to raise the bottom valve, and by operating the emergency lever to lower the bottom valve with the play portion and the connecting means, the emergency valve can be used. Since it can be used as a valve, a single bottom valve can be used as both a bottom valve and an emergency valve, resulting in cost reduction.

[Brief description of the drawings]

FIG. 1 is a sectional view of the device of the present invention.

FIG. 2 is a detailed sectional view of a connecting means.

FIG. 3 is a detailed cross-sectional view showing a state where an outlet is closed by a bottom valve.

FIG. 4 is a detailed sectional view showing a state in which a discharge port is opened by a bottom valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank 2 Discharge port 3 Bottom valve 6 Handle 7 Connecting member 9 1st arm 10 Slot 11 Second arm 12 Valve box 14 Pin 16 Emergency lever 18 Connecting means 23 Play part

Claims (1)

(57) [Claims] A bottom valve for opening and closing a discharge port at a bottom of the tank;
In a tank lorry in which a handle at the top of the tank is connected by a connecting member, and the bottom valve is moved up and down by opening and closing the bottom valve by rotating the handle, the bottom valve and the connecting member are connected to each other by the connecting member. A switch that biases in the orthogonal direction
Pull the ball into the circumferential groove formed in the connecting member
It is engaged with, and coupled with a coupling means for releasing the engagement at the working of the predetermined load, to further the bottom valve of the first arm, the valve body of the outlet bottom via a transmission member to the emergency lever connected And the first arm and the second arm are connected by a play portion formed by a long hole and a pin. The play portion allows the bottom valve to move up and down and raises and lowers the bottom valve. A control device for a bottom valve in a tank lorry in which when the discharge port is opened, the connecting means is released by operating an emergency lever to lower the bottom valve to close the discharge port.