JPH0350077Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a shipping device, and more particularly to a shipping device configured to prevent a loading arm from being pulled up accidentally during shipping.

BACKGROUND TECHNOLOGY In general, in a shipping device that ships a predetermined amount of oil into the tank of a tank truck, when the tank truck arrives at the stage, a loading arm is inserted into the fill port of each hatch of the tank truck, and two Oil liquid is shipped to each hatch by stage opening and closing type metering valve opening and closing operations. In addition, in this type of shipping device, the loading arm is raised or lowered by operating a lifting lever provided on the loading arm, and the loading arm is raised or lowered by a cylinder device or the like that adjusts the downward position. A mechanism is provided on the loading arm.

Therefore, when shipping work to each hatch of a tank truck, first the loading arm provided on the stage is moved above the hatch refueling port.
Next, operate the lift lever to operate the cylinder device of the loading arm lift mechanism to lower the loading arm into the hatch from the fuel filler port. After that, when the amount of liquid to be supplied is set and the shipping start operation is performed, the metering valve is opened and shipping is started. In addition, since the metering valve opens and closes in two stages, shipping is completed by closing the valve in the first stage and then closing the valve in the second stage. Also, the worker judged that shipping was complete based on his intuition at that time, and operated the lift lever to lift the loading arm from the fuel filler port.

Problems to be Solved by the Invention However, the loading arm elevating mechanism of the above shipping device is such that the loading arm can be raised or lowered at any time by operating the elevating lever. In addition, the workers did not confirm that the metering valve was fully closed, and made judgments based on their feelings at the time. Therefore, since the flow rate decreases when the metering valve is closed in the first stage, the operator may conclude that the valve is closed in the second stage. Therefore, with conventional shipping equipment, workers may accidentally operate the lift lever and raise the loading arm while shipping is in progress.
There was a problem that the oil could leak into the surrounding area.

Therefore, an object of the present invention is to provide a shipping device that solves the above problems.

Means for Solving the Problems The shipping device of the present invention has a loading arm that is inserted into the hatch refueling port of a tank truck, and a refueling pipe connected to the loading arm that is provided in the middle of the refueling pipe, and is configured by a diaphragm. a metering valve that opens or closes in conjunction with displacement of the diaphragm; and a piston connected to the loading arm, the piston a cylinder device that drives the loading arm up and down in conjunction with the displacement of the metering valve, a diaphragm chamber for opening the metering valve, a diaphragm chamber for closing the metering valve, and a piston of the cylinder device that urges the loading arm to rise. a fluid supply source connected to the loading arm downward biasing side of the cylinder device through piping and supplying fluid thereto, and the loading arm downward biasing side of the piston of the cylinder device and the It is provided in the middle of a pipe connecting the opening diaphragm chamber of the metering valve, and the fluid supplied to the opening diaphragm chamber of the metering valve is supplied to the downward urging side of the loading arm of the piston of the cylinder device. a check valve that allows the loading arm to descend, while prohibiting the fluid supplied to the loading arm downward biasing side from being supplied to the opening diaphragm chamber of the metering valve; Fluid is supplied from the fluid supply source to the valve diaphragm chamber, and when a predetermined amount is shipped, fluid is supplied from the fluid supply source to the valve closing diaphragm chamber of the metering valve, and the fluid is supplied to the valve diaphragm chamber from the fluid supply source. When the loading arm is inserted into the hatch oil supply port, fluid is supplied from the fluid supply source to the downward urging side of the loading arm of the piston of the cylinder device, and when the loading arm is pulled out from the hatch oil supply port, A fluid supply control means for supplying fluid from the fluid supply source to the loading arm upward urging side of the piston of the cylinder device.

Operation By supplying fluid from the fluid supply source to the loading arm downward urging side of the piston of the cylinder device, the loading arm connected to the piston is lowered to the hatch filler port of the tank truck. At the beginning of shipping, fluid is supplied from the fluid supply source to the opening diaphragm chamber of the metering valve to open the metering valve, and fluid from the fluid supply source is passed from the opening diaphragm chamber to the check valve. It is also supplied to the lower biasing side of the loading arm of the piston of the cylinder device. Therefore, while the metering valve is opened, the metering valve is opened via the check valve from the opening diaphragm chamber on the lower biasing side of the loading arm of the piston of the cylinder device. Fluid from the fluid supply source is introduced, and the side of the piston of the cylinder device that urges the loading arm downward is always pressurized in the same way as the opening diaphragm chamber of the metering valve, so there is no possibility of accidental loading during shipping. Even if the arm is pulled out, the piston of the cylinder device is not displaced and the loading arm is locked in the inserted state.

Embodiment FIG. 1 shows an embodiment of the shipping device according to the present invention. In FIG. 1, a loading arm 4 for shipping oil to a tank 3 of a tank lorry vehicle 2, for example, is disposed on a stage 1 of the shipping device. Also, 1
Six loading arms 4 are arranged on each stage so that up to six types of oil can be shipped.

The loading arm 4 is rotatably supported on the stage 1, and has a base 4a connected to the oil supply pipe 5 at one end, and an arm that rotatably extends upward and downward via a joint 6 at the upper end of the base 4a. It consists of a section 4b and an insertion tube 4c extending downward via a joint 7 at the tip of the arm section 4b. Further, a loading arm elevating mechanism 8 is provided between the base portion 4a and the arm portion 4b of the loading arm 4 to rotate the arm portion 4b and move the insertion tube 4c up and down. Also, in the middle of the insertion tube 4c, there is a lifting lever 9 that is operated when operating the loading arm lifting mechanism 8.
is provided.

As shown in FIG. 2, a cylinder device 10 is fixed to the base 4a of the loading arm 4. As shown in FIG. A rod 10b of a piston 10a provided inside the cylinder device 10 penetrates upward and is connected to one end of a link 11. In addition, link 1
The other end of 1 is the arm portion 4a of the loading arm 4.
It is connected to the. Therefore, when air is supplied to the lower chamber 10c in the cylinder device 10, the piston 1
0a moves upward and the arm portion 4b rotates counterclockwise. Furthermore, when air is supplied to the upper chamber 10d within the cylinder device 10, the piston 10a moves downward and the arm portion 4b rotates clockwise.

Further, the loading arm 4 is connected to a tank 12 for storing oil via a liquid supply pipe 5, and the liquid supply pipe 5 is provided with a pump 13, a flow meter 14, a metering valve 15, etc. . The metering valve 15 is 1
It is a two-stage open/close type, in which the valves of the first stage and the second stage are opened to become fully open, and the valves of the first stage and the second stage are closed to become fully closed. The diaphragm chamber of the metering valve 15 is divided into a valve-closing diaphragm chamber 15b and a valve-opening diaphragm chamber 15c by a diaphragm 15a.

Reference numeral 16 denotes an air supply device connected to the air source 17, which is connected via an air pipe 18 to the valve opening diaphragm chamber 15c, and via an air pipe 19 to the valve closing diaphragm chamber 15b. Also,
The air supply device 16 is connected to the lower chamber 10c of the cylinder device 10 via an air pipe 20. Further, the upper chamber 10d of the cylinder device 10 has an air pipe 2
1 to an air supply device 16.
Further, the valve opening diaphragm chamber 15c communicates with the air pipe 21 via the check valve 25. Therefore, when the metering valve 15 is open, air is also supplied to the upper chamber 10d of the cylinder device 10 through the air pipe 21, and the piston 10a is lowered by air pressure from the valve opening diaphragm chamber 15c. It is held at the limit of movement. That is, while the oil is being shipped, the cylinder device 10 becomes inoperable, and the loading arm 4 is locked with the insertion tube 4c being lowered. Therefore, the insertion tube 4c can be raised only when the metering valve 15 is closed.

Next, the operation of the shipping apparatus having the above configuration will be explained. First, when the tank truck 2 arrives at the stage 1, the loading arm 4 is rotated to position the insertion tube 4c above the hatch filler port 3a of the tank 3.

Here, the elevating lever 9 is operated to lower the insertion tube 4c. That is, when the signal from the lift lever 9 is input to the control device 23, the control device 23 outputs a lowering signal to the air supply device 16. Therefore,
The air supply device 16 supplies air to the upper chamber 10d of the cylinder device 10 via the air pipe 21. As a result, the piston 10a moves downward, the arm portion 4b rotates clockwise, and the insertion tube 4c connects to the hatch oil supply port 3.
It is inserted into the hatch of the tank 3 from a.

Next, a grounding device (not shown) is connected to the tank truck 2, and a setting switch on the operation panel 22 on the stage 1 is operated to set the amount of liquid to be supplied according to the hatch capacity. Then, the user operates the start button on the operation panel 22. When a signal from the start button is input to the control device 23, the control device 23 starts the pump starter 2.
A pump start signal is output to 4, and the pump 13 is started. Further, the control device 23 outputs a valve opening signal to the air supply device 16. Therefore, air supply device 1
6 supplies air through the air pipe 18 into the opening diaphragm chamber 15c of the metering valve 15, and
The valve opening degree of 5 is considered to be one step open. The air supplied into the valve opening diaphragm chamber 15c also flows into the air pipe 21 and is supplied to the upper chamber 10d of the cylinder device 10. Therefore, the piston 10a is pressed and held at the lower limit of movement by the air pressure in the upper chamber 10d.

Further, when the metering valve 15 is opened, the oil in the tank 12 is pumped by the pump 13 and shipped from the loading arm 4 into the tank 3 of the tank lorry vehicle 2. Further, the amount of supplied oil that has been shipped is measured by a flow meter 14, and the flow meter 14 supplies a flow rate measurement signal to the control device 23.

After a predetermined period of time has elapsed after the valve is opened, the metering valve 15 is opened in two stages, and the valve opening becomes fully open. When shipping occurs and before the preset liquid supply amount is reached, the metering valve 1
5 is closed in two stages, and its opening degree is narrowed down.

When the opening degree of the metering valve 15 is narrowed, the flow rate of the oil decreases, so that an operator may conclude that the set amount of liquid has been shipped. However, the upper chamber 10 of the cylinder device 10
d is a diaphragm chamber 15c for opening the metering valve 15;
Since air is supplied from the piston 10
b is held at the lower limit of movement. Therefore, even if the lift lever 9 is operated by mistake during shipping, the cylinder device 10 will not operate, and the insertion tube 4c will not close to the hatch oil supply port 3a.
remains inserted. That is, when the metering valve 15 is open, the loading arm 4 is locked with the insertion tube 4c lowered.

When the set liquid supply amount is shipped, the control device 23
outputs a valve closing signal, and the air supply device 16 stops supplying air to the valve opening diaphragm chamber 15c.

Further, the air supply device 16 supplies air to the valve-closing diaphragm chamber 15b. As a result, metering valve 1
5 is fully closed and the shipment of oil liquid is stopped. Therefore, air is no longer supplied from the valve opening diaphragm chamber 15c to the upper chamber 10d of the cylinder device 10. Therefore, the loading arm 4 is unlocked.

Here, when the lift lever 9 is operated, air is supplied from the air supply device 16 to the lower chamber 10c, and the piston 10a moves upward. Therefore, arm portion 4b
is driven by the cylinder device 10 to rotate counterclockwise, and the insertion tube 4c is pulled out from the hatch oil supply port 3a.

In this way, since the cylinder device 10 is locked while the metering valve 15 is open, erroneous operations such as accidentally pulling out the loading arm 4 from the tank 3 during shipping can be reliably prevented. Therefore, the safety of shipping operations is further improved.

In the above embodiment, the cylinder device 10 is driven by pneumatic pressure, but it goes without saying that a hydraulic cylinder device or an electromagnetic actuator or the like may be used instead of the cylinder device.

Effects of the Invention As described above, in the shipping device according to the present invention, when fluid is supplied from the fluid supply source by the fluid supply control means to the loading arm downward biasing side of the piston of the cylinder device, the loading arm descends. It is inserted into the hatch filler port of a tank truck, and in this state, when fluid is supplied to the opening diaphragm chamber of the metering valve, the metering valve opens and shipping begins, and the fluid in the opening diaphragm chamber is Since it is supplied to the loading arm downward biasing side of the piston of the cylinder device through the check valve, the piston is always pressurized toward the loading arm downward biasing side while the metering valve is open. Therefore, even if the loading arm is pulled out by mistake during shipping, the piston of the cylinder device cannot be displaced from this state, and the loading arm is locked in the inserted state with respect to the hatch oil filler port. is completed. Furthermore, the loading arm can be pulled up from the hatch oil filler port during shipping with a simple configuration such as installing a check valve in the piping connecting the downward urging side of the piston of the cylinder device and the opening diaphragm chamber of the metering valve. In other words, it is possible to reliably prevent an accident in which a worker accidentally pulls up the loading arm and spills the oil while the product is still being shipped. Therefore, it has the advantage that the oil liquid can be shipped more safely and the reliability of shipping operations can be improved.

[Brief explanation of the drawing]

FIG. 1 is a front view for explaining an embodiment of a shipping device according to the present invention, and FIG. 2 is a schematic configuration diagram of the main parts of the present invention. 1...Stage, 2...Tank truck, 3...
... Tank, 4 ... Loading arm, 8 ... Loading arm lifting mechanism, 9 ... Lifting lever,
10... Cylinder device, 15... Metering valve.

Claims (1)

[Scope of Claim for Utility Model Registration] A loading arm inserted into the hatch refueling port of a tank truck, and a valve opening defined by a diaphragm provided in the middle of a fluid supply pipe connected to the loading arm. A metering valve comprising a diaphragm chamber and a closing diaphragm chamber, the metering valve opening or closing in conjunction with the displacement of the diaphragm, and a piston connected to the loading arm, the metering valve opening or closing in conjunction with the displacement of the diaphragm; a cylinder device that drives the loading arm up and down; a diaphragm chamber for opening the metering valve, a diaphragm chamber for closing the metering valve, a side of the piston of the cylinder device that urges the loading arm to rise; A fluid supply source that is connected to the downward biasing side of the loading arm through piping and supplies fluid thereto, and a fluid supply source that is connected to the downward biasing side of the loading arm of the piston of the cylinder device and for opening the metering valve. It is provided in the middle of the piping connecting the diaphragm, and allows the fluid supplied to the opening diaphragm chamber of the metering valve to be supplied to the loading arm downward urging side of the piston of the cylinder device. a check valve that prohibits the fluid supplied to the lowering biasing side of the lowering arm from being supplied to the opening diaphragm chamber of the metering valve; and a check valve that prohibits the fluid supplied to the lowering biasing side of the metering arm from being supplied to the opening diaphragm chamber of the metering valve; Fluid is supplied from the supply source, and when a predetermined amount is shipped, the fluid is supplied from the fluid supply source to the opening diaphragm chamber of the metering valve and to the hatch oil supply port of the loading arm. When the piston of the cylinder device is inserted, fluid is supplied from the fluid supply source to the loading arm downward urging side of the piston of the cylinder device, and when the loading arm is pulled out from the hatch filler port, the piston of the cylinder device is lowered. A shipping device comprising: fluid supply control means for supplying fluid from the fluid supply source to the lifting arm biasing side.