JPS649234B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a bottom valve opening/closing device for a tank lorry, and particularly to a bottom valve opening/closing device that can also be used as an emergency valve.

(b) Prior Art A conventional bottom valve opening/closing device for a tank truck is disclosed in Japanese Patent Application Laid-Open No. 52-101709 (Figures 1 and 2), which uses an arm piece and a pusher piece provided at a connecting part. The arm piece is connected to an operating lever via a wire, and the operating lever is provided with a hook piece that engages and holds the operating lever in an open position. This hook piece is connected to the emergency lever via a wire, and under normal conditions, the operating lever is operated to the open position and engaged and held by the hook piece, and when the valve body is closed, the hook piece is removed to release the engagement. It is becoming more common to do so.
In addition, in an emergency, the valve body can be closed by operating the emergency lever and removing the hook.

(c) Problem to be solved by the invention However, with the above structure, even when opening and closing the bottom valve in normal operation, the operating lever must be operated and the hook piece must be operated at all times, making the opening and closing operation very complicated. It has the disadvantage of becoming.

The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a bottom valve opening/closing device in which the bottom valve can be opened and closed only by the operating lever in normal times, and only by the emergency lever in the event of an emergency. It is something to do.

(d) Means for Solving the Problems The present invention achieves the above object, and provides a tank truck in which a tank is divided into a plurality of chambers and a bottom valve is provided at the bottom of each chamber. A bottom valve opening/closing device main body for opening and closing the bottom valve is provided, and a control device is provided for the plurality of bottom valve opening/closing device main bodies that can simultaneously control each bottom valve opening/closing device main body in the bottom valve closing direction, The main body of the device connects the bottom valve side and the operation handle via a transmission member that is always biased in the direction of closing the bottom valve by a spring, a male thread is formed in a part of the transmission member, and a male thread is formed in a part of the transmission member. A female screw is screwed into a sliding member slidably guided in the front and back direction by a fixed short pipe, and a lock pin is provided on the fixed short pipe to integrate the sliding member with the fixed short pipe, and the lock pin is controlled. This invention relates to a bottom valve opening/closing device for a tank truck, which is connected to an emergency lever that is a component of the device.

(e) Embodiment An embodiment will be explained below with reference to the drawings. 1 is a tank having a plurality of chambers 2...

A bottom valve 3 is provided at the bottom of each of the chambers 2.

Each of the bottom valves 3 has the same structure, so to explain one of them, 4 is a valve box fixed to the bottom of the tank 1 by bolts 5, and the valve box 4 communicates with the chamber 2 at one end and the discharge pipe 6 at the other end. I've let it happen.

A valve shaft 7 supported so as to be vertically movable is provided within the valve body 4, and a valve body 8 for closing the valve body 4 is fixed to the valve shaft 7.

A shaft 9 is rotatably passed through the valve box 4, and an inner arm 10 connected to the valve shaft 7 is fixed to an end inside the valve box 4 of both ends of the shaft 9.
An outer arm 12 to which a bush pull wire 11 serving as a transmission means is connected is fixed to the outer end of the valve box 4.

Each of the bottom valves 3... is provided with a bottom valve opening/closing device main body A for opening and closing the bottom valve, and each bottom valve opening/closing device main body A is provided for the plurality of bottom valve opening/closing device main bodies A... Control device B that can simultaneously control the bottom valve closing direction
is provided.

Next, the bottom valve opening/closing device body A will be explained.
Reference numeral 13 denotes an operating handle for opening and closing the bottom valve 3, and the operating handle 13 is fixed to the end of a rod 14 serving as a transmission means.

The other end of the rod 14 is connected to the bush pull wire 1 via a joint 15 to which only forward and backward movement is transmitted.
1.

A part of the rod 14 is supported so as to be movable back and forth by a fixing member 16 fixed to the tank 1 side, and a direction in which the bottom valve 3 is closed (see FIG. 2) is provided between the fixing member 16 and the rod 14. A biased spring 17 is provided on the left side).

Further, a male thread 18 is formed in a part of the rod 14, and the female thread 19 of the sliding member 19 is attached to the male thread 18.
are screwed together. The sliding member 19 is provided in a fixed short pipe 20 fixed to the tank 1 side, and protrusions 21, 21 provided on the upper and lower sides of the sliding member 19 are cut out in the front-back direction of the inner surface of the fixed short pipe 20. Notch groove 2
2 and 22, so that the sliding member 19 can slide only in the front-back direction.

Reference numeral 23 denotes a lock pin provided radially on the fixed short tube 20. The lock pin 23 has its distal end engaged with the groove 24 of the sliding member 19 to integrate the sliding member 19 with the fixed short tube 20, and the proximal end of the lock pin 23. is made to protrude from the fixed short tube 20.

A bell crank 2 is attached to the base end of the lock pin 23.
5 is pivotally supported, and the bell crank 25
Due to the rotation of the sliding member 19 by the lock pin 23,
The lock is now being released.

Next, the control device B will be described. Reference numeral 26 is an emergency lever for urgently closing the bottom valve 3 when a fire occurs during liquid discharge.

A rod 27 is attached to the emergency lever 26, and one end of each bell crank 25 on the bottom valve opening/closing device main body A is pivotally supported in the middle of the rod 27, and the emergency lever 26 is operated. By doing so, each bell crank 25... is rotated.

On the rod 27 is a lock pin automatic release device 28 that automatically unlocks each lock pin 23 and closes each bottom valve 3 in the event of a fire.
is provided.

The lock pin automatic release device 28 is
A large diameter portion 29 is formed on the large diameter portion 7, a movable member 30 is provided on the large diameter portion 29, and the movable member 30 is made large by pressing the engagement pin 31 provided on the movable member 30 with a soluble material 32. It is designed to be integrated into the diameter portion 29.

A spring 33 is provided between the movable member 30 and the rod 27 and is biased in a direction to unlock the lock pins 23.

Further, a fixed plate 34 is fixed to the tank 1 side at a location somewhat apart from the movable member 30, and the soluble material 32 of the movable member 30 is dissolved to release the integration between the movable member 30 and the large diameter portion 29. By doing so,
The movable member 30 is slid by the spring 33 until it comes into contact with the fixed plate 34, and as a reaction force, the rod 2
7 is the lock pin 23 in the direction of unlocking the rod 2
It is designed to move 7.

In the embodiment, the rotation of the sliding member is restricted by the protrusion of the sliding member and the notch groove of the fixed short tube, but the outer surface of the sliding member and the inner surface of the fixed short tube are Even if it is shaped, it has similar effects.

The operation of the present invention having the above-described structure will now be explained. First, when discharging the liquid in the chamber 2, the operating handle 13 is turned from the solid line position in FIG. 2 to the dot-dashed line position.

At that time, since the sliding member 19 is integrated with the fixed short pipe 20 by the lock pin 23, the rod 14
moves against the force of the spring 17 to the position indicated by the dashed dot line in FIG.

When the rod 14 moves to the right in FIG.
2, and the outer arm 12 is rotated clockwise. The rotation of the outer arm 12 causes the inner arm 10 to rotate clockwise via the shaft 9, thereby lifting the valve stem 7, opening the valve body 8 as shown by the dashed line in FIG. 2, and draining the liquid in the chamber 2. is discharged through the valve box 4 and the discharge pipe 6.

Next, if a fire occurs during the liquid discharge, the emergency lever 26 is pushed to the right in FIG. Then,
The lock pin 23 is unlocked via the rod 27 and the bell crank 25, and the sliding member 19, which had been fixed to the fixed short tube 20, is integrally moved to the second rod 14 by the force of the spring 17.
It is moved to the left side of the figure (the state shown in FIG. 4).

As the rod 14 is moved, the movement of the rod 14 causes the bush pull wire 11, the outer arm 12,
This is transmitted to the shaft 9, inner arm 10, and valve stem 7, thereby closing the valve body 8.

This will help keep fires to a minimum.

Furthermore, in the event of a severe fire, the soluble material 32 of the lock pin automatic release device 28 will melt as shown in FIG.
The integration between the movable member 30 and the movable member 30 is released, and the movable member 30 abuts the fixed plate 34 and the rod 27
is moved by the force of the spring 33 to the right side in FIG. 4, that is, in the direction in which the lock pin 23 is unlocked.

When the lock pin 23 is unlocked, the valve body 8 is closed in the same order as described above, and thereby the discharge of liquid can be automatically stopped without operating the emergency lever 26.

(f) Effects of the Invention As described above, the present invention uses a spring to urge the transmission means that connects the bottom valve side and the operating handle side in the bottom valve closing direction, and forms a male thread in a part of the transmission means, The female screw of the sliding member, which is restricted to be able to move back and forth only, is screwed into the male screw by a fixed short pipe, and the sliding member is integrated with the fixed short pipe using a lock pin, so that it corresponds to each bottom valve. Each of the lock pins is connected to one emergency lever so that the bottom valve can be closed in an emergency by operating the emergency lever.

Under normal circumstances, the bottom valve can be opened and closed by simply operating the operating handle, and in an emergency, the bottom valve can be closed by simply operating the emergency lever, making opening and closing the bottom valve extremely easy. Become.

[Brief explanation of the drawing]

FIG. 1 is an overall view, FIG. 2 is a partially enlarged view, FIG. 3 is a sectional view taken along line XX in FIG. 2, and FIG. 4 is an operating state diagram. 3 is a bottom valve, 13 is an operating handle, 17 is a spring, 18 is a male screw, 19 is a sliding member, 20 is a fixed short tube, 23 is a lock pin, 26 is an emergency lever, and 28 is an automatic lock pin release device.

Claims (1)

[Claims] 1. In a tank truck in which a tank is divided into a plurality of chambers and a bottom valve is provided at the bottom of each chamber, a bottom valve opening/closing device main body for opening and closing the bottom valve is provided corresponding to each bottom valve, and the plurality of bottom valve opening/closing devices are provided. The main body is provided with a control device capable of simultaneously controlling each bottom valve opening/closing device main body in the bottom valve closing direction, and the bottom valve opening/closing device main body is configured to:
The bottom valve side and the operating handle are connected through a transmission member that is constantly biased in the bottom valve closing direction by a spring, a male thread is formed in a part of the transmission member, and a fixed short pipe is formed in the male thread. A female thread of a sliding member that is slidably guided in the front and back direction is screwed together at the fixed short pipe, and the fixed short pipe is provided with a lock pin that integrates the sliding member with the fixed short pipe, and the lock pin is connected to a component of the control device. A bottom valve opening/closing device for a tank truck connected to a barrel emergency lever.