JPS6112839B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bottom valve operating device for a tank truck.

The bottom valves provided in each tank compartment of a tank truck are operated not only when discharging the fuel oil in each tank compartment, but also during reverse pumping and filling. In the case of such draining and filling, the progress of draining and filling inside each tank should be monitored through the manhole window attached to the canopy of each tank compartment, or the capacity should be confirmed using a gauge installed at the top of the tank before draining. If the bottom valve operation part is located at the top and bottom of the tank, instead of only at the bottom or top of the tank, the supervisor should finally contact the person in charge of operating the bottom valve at the bottom of the tank. This is preferable because the monitor can operate the system by himself without having to take any steps, or because the bottom valve operator does not have to go up and down the tank every time to monitor and operate the bottom valve.

However, simply having a bottom valve operating section at both the top and bottom of the tank will not work.
For example, it is possible to open the valve at the top of the tank, then go down to the ground and close the bottom valve at the bottom of the tank. In other words, the valve can be operated independently without being restricted by the operation of the other side. If it is not possible, it will be inconvenient and useless.

However, the reality is that there is still no such system in which the bottom valve is operated using fluid pressure.

The present invention has been made in view of the above points, and one embodiment will be described in detail below based on the drawings.

Figure 1 is an overall view of a tank truck to which the present invention has been applied. In the figure, 1 is the tank body, 2, ... are partition plates for configuring tank compartments, and 3, ... are manhole windows provided on the canopy of each tank compartment. , 4, ... are the bottom valves of each tank compartment, 5 is the bottom valve operating valve on the lower side of the tank, 6
is the bottom valve operation valve on the upper side of the tank, 7, ... is the bottom valve 4
8 indicates the above-mentioned fluid piping, 9 is a discharge valve, 10 is an emergency valve, and 11 is a cylinder part (fluid operating device) attached to each bottom valve to operate it by fluid pressure. The emergency release devices installed are shown below.

Fig. 2 is a piping circuit diagram of the device of the present invention which employs a system in which the bottom valve operating valve is held in two positions and in either switching position.In the figure, air is used as the fluid for operating the bottom valve. , but is not limited to this, and may be hydraulic.

In the figure, 12 is a compressor, 13 is an air tank, 14, ... is a buzzer that senses the pressure in the circuit, which is preferably attached to the circuit behind each operating valve.
A fluid pressure notification device that notifies the opening and closing of the bottom valve by using a display device such as a lamp, and the bottom valve operating valves 5 and 6 mentioned above.
In the A position, fluid is supplied to the rear circuit connected to the cylinder section 7, and in the B position, the fluid in the rear circuit is discharged to the outside.The switching operation part is pilot operated as shown schematically in the figure. It is constructed in an integral relationship with an actuating body (piston) that is biased in one direction by a repellent strip provided on the part, and the mode when biased in one direction is the above-mentioned B position, in which fluid is applied behind the actuating body (piston). The above-mentioned A position is a mode in which pressure is applied and the actuating body (piston) is moved against the plucked stripes.

The rear circuits of each of the upper and lower operation valves of the tank are connected to the cylinder part 7 after merging with each other,
In addition, the fluid emergency opening section consisting of only one emergency opening device 11 and emergency valve 10 is connected to the fluid emergency opening section through check valves 15, . . . The pilot actuating portions are in communication with each other.

In this embodiment, as described above, the back side circuits of the operation valves for different bottom valves are communicated with each other through the check valve 15, so that reverse operations performed simultaneously on different bottom valves, In other words, 1
Even if the fluid pressure is released by the operation valve of the bottom valve of 1 and the fluid is injected by the operation valve of the adjacent bottom valve, check valve 1
The presence of 5 prevents problems such as infusion fluid flowing into an open circuit.

This is achieved by carefully using check valves.
This means that the fluid emergency release section, which would normally have to be provided separately in the circuit behind the operating valve for each bottom valve, can be omitted to just one.

In addition, since they are mutually connected to the pilot operating section of the other operating valve, when one operating valve is manually set to the A position, fluid pressure is generated behind the operating body (piston) of the pilot operating section of the other operating valve. is activated and automatically becomes the A position, and when one operating valve is manually moved to the B position, the fluid behind the actuating body (piston) of the pilot operating part of the other operating valve is also released, and the Becomes B position. In other words, when either one is switched, the other is also switched at the same time.

The device of the present invention having the above-mentioned configuration allows any operation to be performed independently without any hindrance or restriction to the previous operation even if the operation valve on either the upper or lower side of the tank is operated. It can be done by taking

In addition, in FIG. 2, reference numeral 16 indicates a throttle valve. Further, FIG. 3 shows another embodiment in which an emergency valve 10 is provided in the circuit between the compressor 12 and the bottom valve operating valves 5 and 6. In the figure, 17 is a cable wire 18 for operating the emergency valve 10. 19 indicates an automatic closing device interposed in the middle of the wire of the emergency lever connected to the emergency lever.

The difference between Fig. 2 and Fig. 3 is the arrangement of the emergency opening part; in Fig. 2, the opening is done in the circuit behind the operating valve, whereas in Fig. 3, it is opened in the circuit on the front side of the operating valve. The valve is designed to open automatically, eliminating the need for a check valve.

Next, the mechanism of the above-mentioned bottom valve operation valve will be explained with reference to FIG.

In the case of the three-way pipe joint 20 in the case of Figure A, there is an opening 2 for connection on the air tank 13 side.
1. Opening hole 22 for connection to the circuit behind the operating valve;
Opening holes 23 are provided for connection to the atmosphere side, respectively.
Further, the valve body 24 has a connecting bending passage 25 bored therein, and a hand rod 26 is installed therein. The B position is the mode in which the apertures 22 and 23 are in communication, and the A position is in which the apertures 22 and 21 are in communication when the hand rod 26 is rotated to the left.
position.

Cylinder body 2 of the aforementioned pilot operating section 27
7-a is pivotally fixed to the mounting base 28, and the piston rod body 29 of the actuating body (piston) 70 is pivotally fixed to the hand rod 26 to form the above-mentioned integral relationship. In addition, the pilot operating section 27
A plucked strip 27-c is provided to press and urge the actuating body (piston) 70 to the right in the figure.

In the example shown in Fig. B, the switching valve section in Fig. A is constructed within the cylinder body 27-a, and the bottom valve operation valve 5 (or 6) and the pilot operating section 27 are integrally constructed. is configured with a total of four tsuba 31, . . . and each tsuba 31, .
Opening holes 32 for connecting to the air tank 13, communicating with the respective empty chambers defined by...
A hole 33 for connection to the circuit behind the operating valve and a hole 34 for connection to the atmosphere side are provided, and the hand rod 26 is connected between the hole 33 and the hole 34 shown in the figure as shown by the solid line. This is the B position, and when the hand rod 26 rotates to the left, the opening 32
This is the A position in which the aperture 33 and the aperture 33 are in communication with each other. Also, inside the cylinder 27-b, there is a repellent 2
7-d is provided to press and urge the collar 31... to the right in the figure. In this embodiment, the repellent strip 27-d
is provided not on the pilot operating portion 27 side but on the bottom valve operation valve 5 (or 6) side.

The mechanism of the emergency valve 10 described above will be explained with reference to FIG.
In the two-way joint 35, a connecting hole 36 is provided on the circuit side communicating with the cylinder portion 7, and a connecting hole 37 is provided on the atmosphere side, and the valve body 38 is provided with a connecting straight passage 39. Drilled and hand rod 4
0 is planted.

The hand rod 40 is in the closed position when the communication passage 39 shown by the solid line does not correspond to the openings 36 and 37, and is always kept in this position by the tensile force of the plectrum 41 fixed to the hand rod 40. While held in position, the hand rod 40 is rotated to the right against the plectrum 41 to bring the communication passage 39 into alignment with the openings 36, 37, thereby causing the emergency release of fluid.

The emergency release device 11 mentioned above will be explained with reference to FIG.

This is made by attaching a stopper made of a material that melts when it reaches a predetermined temperature to the opening of a branch pipe section 42 attached in front of the emergency valve 10. Plug body 4 formed in a plate shape in hole step portion 43
4 is mounted by pressing with a cylindrical retaining screw 45, and in the case of Fig. B, a plug body 46 configured as a screw plug is mounted in the opening.

In the event of a fire during refueling, the above-mentioned emergency valve 10 can close each bottom valve at the same time at a location apart from the discharge valve 9, and
The emergency opening device 11 can automatically close the bottom valve when a worker cannot approach due to a fire.

A bottom valve mechanism equipped with the previously described cylinder section 7 (fluid operating section) will be explained with reference to FIG.

Figure A shows an example in which the cylinder part 7 is installed inside the tank, and Figure B shows an example in which the cylinder part 7 is installed outside the tank. In the figure, 47 is an opening provided at the bottom of each tank compartment, and this is where the flange part 48 is installed. It is welded, and an intervening pipe joint 49 is flange-connected to this for communicating with the pipe leading to the discharge valve 9.

The diameter of the pipe joint 49 is set smaller than that of the opening 47, and in order to serve as a valve seat, it protrudes slightly, and the valve body 5
0 is brought into contact with a biasing force such as a repellent.

The cylinder portion 7 has its piston rod tip fixedly attached to the valve body 50, and resists the aforementioned biasing force to push the valve body 5.
0 in the valve opening direction using fluid pressure.

That is, in the case of Fig. A, a dish-shaped pedestal 51 is fixed to the flange of the pipe joint 49, and the cylinder part 7 is placed on top of this, and 52 in the figure is between the top plate of the pedestal 51 and the valve body 50. 53 is a passage hole perforated in the side wall of the pedestal 51;
4 is a piston, 55 is a piston rod, and 56 is a communication hole provided through the piston rod 55, which guides the pressure inside the pipe joint 49 to the upper part of the piston 54 when filling the tank compartment from the pipe joint 49 with a pump. , to balance the pressure applied to the valve body 50.

The piping 8 is connected to the lower part of the cylinder part 7, and fluid is forced into the lower side of the piston 54 to raise the piston rod 55 and open the valve body 50.

In the case of figure B, a branch pipe part is shaped to the pipe joint 49, and this is made into the cylinder part 7, which is indicated by 5 in the figure.
7 is a piston rod guide shaped in the pipe joint 49, and 52' is a rod interposed between the guide 57 and the piston 54, which presses the piston 54 downward to force it to the tip of the piston rod 55. The fixed valve body 50 is urged in the closing direction. Since the pressure within the pipe joint 49 acts on the opposing surfaces of the piston 54 and the valve body 50, the pressure within the pipe joint 49 applied to the valve body 50 is balanced.

The pipe 8 is connected to the bottom cover 58 of the cylinder section 7, and the fluid is forced into the lower side of the piston 54 to raise the piston rod 55 and open the valve body 50.

The previously described automatic closing device 19 will be explained with reference to FIG.
In the figure, 59 is a cylinder case, 60 is a rod that passes through the cylinder case 59, one end is connected to the cable wire 18 connected to the emergency valve 10, the other end is pivoted to the emergency lever 17, and 61 is the rod 60.
63 is a spring that urges the piston 61 in the direction of operating the emergency lever; 64 is a locking recess 61 shaped in the piston 61; ' is a stopper whose tip is locked and fitted, and this is a stopper housing cylinder 6 attached to the bottom surface of the cylinder case 59.
Fuse 6 which melts at a predetermined temperature within 5
6 and is received and mounted by a set screw 67.

68 is a cylinder case 59 mounting base.
With the configuration described above, when the fuse 66 melts under a predetermined temperature atmosphere, the stopper 64 falls and disengages the piston 61.
is forcibly moved in the biasing direction of the spring 63. That is, the emergency valve 10 is opened by operating the emergency lever 17.

Note that the fluid operating device and the pilot operating section are not limited to the cylinder type, and a diaphragm type may also be used.

As explained above, according to the present invention, it is possible to independently open and close the bottom valve either in the upper part of the tank or on the ground, which has an extremely significant effect on work efficiency.

[Brief explanation of the drawing]

Fig. 1 is an overall view of a tank truck when the present invention is applied, Figs. 2 and 3 are piping circuit diagrams of the device of the present invention,
Figure 4 is a cross-sectional view of the switching valve part of the bottom valve operation valve, Figure 5 is a cross-sectional view of the emergency opening device, Figure 6 is a cross-sectional view of the emergency valve, Figure 7 is a cross-sectional view of the automatic closing device, and Figure 8 is a cross-sectional view of the switching valve part of the bottom valve operation valve. The figure is a sectional view of the bottom valve. Brief explanation of symbols, 1...tank, 2...tank compartment, 4...bottom valve, 5, 6...bottom valve operation valve, 7
...Fluid actuation device (cylinder part), 27...Pilot actuation part, 27c, 27d...Repellent strip, 52
... Plucked stripes.

Claims (1)

[Claims] 1. In the fluid piping circuit of a bottom valve operating device using fluid pressure, in which bottom valve operating valves for operating the bottom valve provided at the bottom of the tank compartment are arranged at multiple locations such as on the top and bottom of the tank, A fluid actuator is provided in conjunction with the valve and operates in a direction to open the bottom valve against a reel that biases the bottom valve in a direction to close the bottom valve, and a fluid actuator is provided in a pressurized fluid circuit of the fluid actuator. The plurality of bottom valve operating valves are arranged in parallel, and the bottom valve operating valves are communicated with each other against a reel that urges the bottom valve operating valve in a direction to close the bottom valve operating valve. A bottom of a tank truck, characterized in that each pilot operating section is provided to operate in a direction in which the bottom valve is operated, and the respective pilot operating sections are interlocked to maintain the respective bottom valve operation valves at the same switching position. Valve operating device.