JPS6226996B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid supply device for supplying fuel liquid to, for example, a tank truck. a first side passage that communicates with the inflow side of the valve and communicates with the outflow side of the main valve via a second valve that is biased in a direction to close the outflow portion of the hydraulic pressure chamber against hydraulic pressure; established,
Separately from the first side channel, a second side channel is provided with a first valve of a self-closing device operated by negative pressure and a negative pressure generator, with one end thereof on the inflow side of the main valve; The other end communicates with the outflow side of the main valve, a side passage discharge pipe is provided on the downstream side of the first and second side passages, and the second valve is interlocked with the first valve by an interlocking means. This invention relates to a liquid supply device.

Such liquid supply devices are known, and when supplying a relatively large amount of liquid, such as when supplying a tank truck, a side pipe, ie, a secondary pipe, is used to facilitate control of the main valve. A second side passage is provided, and a first valve that is opened and closed by an external operation such as a lever is provided in the middle of the side passage pipe, and the back pressure of the main valve is reduced by opening and closing the first valve. The main valve is controlled to open and close the main valve.
-Refer to Publication No. 55992). This first valve is normally activated and closed by a signal from a liquid level sensor (e.g. negative pressure), so that the main valve can be closed when the tank is "full". It's summery. When the main valve is controlled to open and close based on the back pressure and signals from the liquid level sensor, the main valve's back pressure is linked to external operation, and the main valve opens when the pressure in the liquid supply pipe, that is, the main valve's back pressure increases. a second valve is provided in a first side passage provided separately from the second side passage;
The valve is designed to function as a safety valve when the pressure in the liquid supply pipe increases due to a rise in temperature, for example.

When supplying liquid with such a liquid supply device, (a) Even if the main valve is closed, the liquid adhering to the inner wall of the liquid supply pipe will drip due to the viscosity of the liquid, and (b) the pressure of the liquid supply pipe may increase due to, for example, a rise in temperature. As it climbs up, the second valve opens and liquid leaks from the side pipe. There is a drawback.

The technique of providing a closure at the tip of the liquid supply pipe in order to prevent this liquid from dripping was developed, for example, in Japanese Patent Application Laid-open No. 50
-Described in Publication No. 16912.

However, such known techniques relate to expandable drop pipes, and cannot solve the above-mentioned drawbacks a and b even if applied to ordinary liquid supply pipes.

Therefore, an object of the present invention is to provide a side discharge pipe with a valve that opens when the liquid pressure increases, so that even if the valve opens due to expansion of the liquid due to temperature rise or other causes, the liquid will not be discharged from the side passage. An object of the present invention is to provide a liquid supply device that does not flow out of a pipe.

According to the present invention, a main valve having a hydraulic pressure chamber on the back part is provided in the middle of the liquid supply pipe, and the hydraulic chamber communicates with the inflow side of the main valve, and the outflow part of the hydraulic pressure chamber is controlled by hydraulic pressure. A first side passage communicating with the outflow side of the main valve via a second valve biased in a direction of closing against the resistance is provided, and the first side passage is operated by negative pressure separately from the first side passage. A first valve of the automatic closing device and a second side passage provided with a negative pressure generating section communicate at one end with the inflow side of the main valve and at the other end with the outflow side of the main valve. In a liquid supply device in which a side passage discharge pipe is provided on the downstream side of the first and second side passages, and the second valve is interlocked with the first valve by an interlocking means, the distal end of the side passage discharge pipe is closed. A closure having a section is slidably mounted on the discharge tube.

Therefore, even if the second valve, which is opened and closed by an external operation and opens when the liquid pressure in the liquid supply pipe increases, opens due to a rise in temperature of the liquid supply device, liquid will not flow out from the side discharge pipe. This second valve serves as a safety valve and is therefore safe to prevent oil spillage by means of a closure.

Therefore, the main valve can be smoothly controlled by the side discharge pipe without polluting the surrounding area, and there is no risk of fire if the liquid is flammable oil, and there is no waste of resources.

When the side discharge pipe is provided inside the liquid supply pipe when carrying out the present invention, the closure of the liquid supply pipe can also serve as the closure of the side discharge pipe. however,
If the side discharge pipe is provided outside the liquid supply pipe, an independent closure must be provided.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a circuit diagram schematically showing the entirety of a liquid supply device embodying the present invention. It is adapted to flow into the liquid supply pipe 1 through the valve V. This liquid supply pipe 1 includes a main pipe 1a having a main valve 3 and a valve 5 that opens when the liquid pressure becomes high.
A side passage discharge pipe 4 having a diameter is connected in parallel, and both 1a and 4 are connected to the discharge pipe 2. According to the present invention, a closure body 6 is provided at the distal end of the discharge pipe 2 on the discharge side.

FIG. 2 shows a tank T being supplied with liquid using the liquid supply device according to the present invention, in which a closure body 6 is provided at the tip of the discharge pipe 2. This closure body 6 is constructed as a telescopic tube that is slidably fitted into the discharge pipe 2, and its details will be described later in FIGS. 4 to 6.
First, the configuration of the main valve 3 of the liquid supply device to which the closure body 6 is applied will be explained.

In FIGS. 2 and 3, the main valve 3 has a spring 3
a in the closing direction, and the central sleeve 3b is guided by the main valve guide rod 3c.
The main valve 3 is designed to move smoothly. A hydraulic chamber 7 is formed at the back of the main valve 3, and this hydraulic chamber 7
is sealed by a seal 8 provided on the main valve 3, and is provided with an inlet 10 which is adjusted by an inflow adjustment screw 9.

A side passage inlet pipe 11 constituting a second side passage is connected to the liquid supply pipe 1 on the upstream side of the main valve 3.
A side discharge pipe 4 is connected to the liquid supply pipe 1 on the downstream side of the liquid supply pipe 1 . An automatic closing device 13 is provided between the side channel inlet pipe 11 and the side channel discharge pipe 4, and the device 1
3 has a first or bypass valve 15 biased by a spring 14. An external contact device for opening and closing this sideway valve 15, that is, a lever 16 in the illustrated example, is fixed to a shaft 18 that is pivotally supported by a case 17, and a bell crank 19 is fixed to the shaft 18.
The bell crank is rotated by the lever 16.
The bell crank 19 is provided with contact pieces 20 and 21 for regulating the rotation of the lever 16, and one end of the bell crank 19 is provided with a recess 24 that can engage with a click made of a spring 22 and a ball 23. A swing lever 25 is in contact with the other end. An operating rod 27 of a cam lever 26 that opens and closes the bypass valve 15 comes into contact with the center of the swing lever 25, and
The end of the swing lever 25 is pivotally attached to a sliding rod 28. The sliding rod 28 is locked by a locking rod 30 and a ball 31 fixed to the diaphragm 29. With the above configuration, when the lever 16 is rotated clockwise, the bell crank 19, the swing lever 25, and the cam lever 26 are sequentially rotated, and the side passage valve 15 is rotated.
open. That is, the first valve 15 is opened and closed by the operation of the lever 16 and the diaphragm 29.

A check valve 34 biased by a spring 33 is provided downstream of the bypass valve 15.
A negative pressure generating section 35 is provided near the spring 3 through a negative pressure pipe 36.
A negative pressure pipe 39 is transmitted to a diaphragm chamber 38 provided with a negative pressure pipe 7, and the other end is opened to a tank T.
is connected to. At the open end of the negative pressure tube 39,
A float valve is provided that floats up with the liquid and closes the negative pressure pipe 39 when the liquid level in the tank T rises above a certain value. This float valve was created in 1983.
No. 29360, and illustration thereof is omitted since it is not the gist of the present application. Further, a function test valve 40 and an alarm device 41 are provided in the middle of the negative pressure pipe 39.

Further, the hydraulic pressure chamber 7 at the back of the main valve 3 is connected to the side discharge pipe 4.
A second valve, i.e., a second valve, which is connected to the first valve, i.e., the bypass valve 15, is in communication with the pipes 46, 47 constituting the first side passage, and is biased by a spring 48 between these pipes 46, 47. A main valve opening/closing valve 49 is provided. This second valve, that is, the main valve opening/closing valve 49
is mechanically interlocked to open when the first valve 15 opens, and communicates the hydraulic chamber 7 with the side discharge pipe, and when the first valve 15 closes, it is closed by the spring 48, and the liquid supply is closed. When the internal pressure of the tube 1 increases, it opens against a spring 48. In addition, 50 is the swing lever 2
A peephole is provided in the case 17 to observe the movement of the support shaft 51, 52 is a vapor recovery pipe, and 58 is a pressure equalization pipe (FIG. 2). When a vapor recovery is provided in the vapor recovery pipe 52, the internal pressure in the tank T increases with refueling, but the increased pressure is applied to the diaphragm chamber 60 via the pressure equalization pipe 58 and the passage 59.
Check valve 34 regardless of the internal pressure of tank T.
The diaphragm 29 operates properly due to the negative pressure generated. Therefore, changes in the internal pressure of the tank T do not affect the operation of the diaphragm 29.

Next, to explain the operation of the main valve 3, first the lever 1
6 clockwise and held in that position by clicks 22 and 23. Then, bell crank 1
9, the side passage valve 15 is opened via the swing lever 25 and the cam lever 26, and the liquid from the side passage inlet pipe 11 is
The check valve 34 is pushed open and the water flows into the side discharge pipe 4. Therefore, negative pressure is about to be generated in the negative pressure generating section 35, but since it is communicated with the pressure inside the tank T, that is, the atmospheric pressure, through the negative pressure pipe 39, no negative pressure is generated in the negative pressure section yet. The main valve opening/closing valve 49 opens in response to the side passage valve 15, and fluid flows into the side passage discharge pipe 4, so that the pipe 47 becomes negative pressure, and the negative pressure is transferred to the pipe 46.
is transmitted to the hydraulic pressure chamber 7 via.

That is, since the pipe 46 is larger than the inlet 10, the pressure in the hydraulic chamber 7 becomes negative, and the main valve 3 is smoothly guided by the guide pipe 6 and moves toward the hydraulic pressure chamber 7.

Therefore, the liquid supply pipe 1 is opened and the liquid is supplied into the tank T. When the liquid in the tank reaches a certain height, the outlet of the negative pressure tube 39 is closed, and negative pressure is generated in the negative pressure generating section 35, and this negative pressure causes the diaphragm 29 to bend against the spring 37. At the same time, the locking rod 30 moves, and the sliding tube 28 and its support shaft 51, which were locked together with the ball 31, move to the left.

At this time, the side passage valve 15 and the main valve on-off valve 49 are
They are closed by the forces of springs 14 and 48, respectively. As a result, no negative pressure acts on the hydraulic pressure chamber 7 at the back of the main valve 3, and the main valve 3 is closed by the spring 3a. At this time, liquid is gradually supplied to the hydraulic chamber 7 from the side passage inlet pipe 11 via the inlet 10, so the main valve 3 closes at a low speed, and therefore the liquid supply pipe 1 closes rapidly. No phenomena such as water hammer occur. Also, usually a flowmeter C with preset
The amount of liquid to be replenished into the tank T is preset, and when a certain amount of liquid is replenished into the tank, the flow meter C indicates the amount and a signal is sent to the on-off valve V to close the valve V. The specified liquid is replenished into the tank, the hand valve is closed, and the liquid supply ends.

However, if you make a mistake in the preset amount,
If the flow meter C and on-off valve V malfunction, or if there is residual liquid in the tank T and it fills up earlier than planned, there is a risk that the tank T will be filled with more than the planned amount. At this time, the liquid supply device of the present invention operates to ensure that a predetermined amount of liquid is supplied to the tank.

Next, an embodiment of the closure body 6 will be described with reference to FIGS. 4 to 6.

The closing body 6 provided at the tip of the discharge pipe 2 has a fourth
In the figure and FIG. 5, it consists of a cylindrical part 61 that is slidably inserted into the discharge pipe 2, a bottom part 62 that matches the tip of the discharge pipe 2, and a closing part, that is, a central protrusion 66 in the illustrated example, The cylindrical portion 61 is provided with an outlet 63 for draining the liquid. bottom 6
In order to improve the outflow of liquid, the center portion of the container 2 is raised and a closing portion, that is, a protrusion 66 protrudes upward. Further, the upper end of the cylindrical portion 61 is provided with a hook 6a that engages with a protrusion 2a provided on the discharge pipe 2 when the closure body 6 is in the raised position, as shown in FIG. and side passage discharge pipe 4
An annular gasket 65 is provided on the holder, and the gasket 65 is adapted to fit into a projection 66.
Note that the gasket 65 may be omitted and the protrusion 66 may be made flexible.

With the above configuration, an operator disengages the protrusion 2a and the hook 6a, lowers the closing body 6 via a chain (not shown), and connects the discharge pipe 2 to the tank T.
Insert it into the tank, open the main valve 3 as described above and supply oil,
The main valve 3 is closed to finish refueling, and the discharge pipe 2 is connected to the tank T.
When the closing body 6 is pulled up outward and the hook 6a is engaged with the protrusion 2a, the protrusion 66 engages with the gasket 65 to prevent liquid from dripping from the side discharge pipe 4. When the liquid in the liquid supply pipe between the on-off valve V and the main valve 3 expands due to a rise in temperature when the liquid supply device is not in use, the expanded liquid passes through the hydraulic pressure chamber 7 and the pipe 46 and pushes the valve 49 against the spring 48. It is pushed open against the resistance and drips into the side discharge pipe 4 through the pipe 47. However, since the distal end of the side discharge pipe 4 is closed by a closure part or protrusion 66, dripping of liquid can still be prevented.

In yet another embodiment shown in FIG.
A gasket 64 for closing the distal end of the discharge pipe 2 is provided on the periphery of the bottom portion 62, a gasket 65 is provided on the distal end of the bypass discharge pipe 4, and a protrusion 66 that engages with the gasket 65 is provided on the bottom portion 62.

In the above embodiment, after refueling, the closing body 6
When the liquid is raised, both the discharge pipe 2 and the side discharge pipe 4 are closed at the same time, as described in each of the above embodiments, thereby preventing the liquid from dripping.

As explained above, in the liquid supply device according to the present invention, since the closing body that closes the discharge pipe and/or the side discharge pipe is slidably provided at the tip of the discharge pipe, the closing body is immediately removed after refueling. By closing, it is possible to prevent the liquid from dripping and to prevent the liquid from flowing out due to the expansion of the liquid due to temperature rise.As a result, it is possible to prevent danger and contamination, and to save resources. It is possible to shorten the working time and prevent dirt from entering the discharge pipe, etc.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing an embodiment of the liquid supply device according to the present invention, Fig. 2 is a diagram showing an example of use of the liquid supply device, Fig. 3 is a detailed view of the main valve section, and Fig. 4 is a closed view. FIG. 5 is a detailed sectional view showing the closed body shown in FIG. 4, and FIG. 6 is a sectional view showing another embodiment of the closure body. DESCRIPTION OF SYMBOLS 1...Liquid supply pipe, 2...Discharge pipe, 3...Main valve, 4...Side passage discharge pipe, 5...Side passage valve, 6...Closing body, 15...Side passage valve (first valve), 16...Lever (external operation means),
49...Main valve opening/closing valve (second valve), 66...Protrusion (closing part).

Claims (1)

[Claims] 1. A main valve having a hydraulic pressure chamber on the back is installed in the middle of the liquid supply pipe, and the hydraulic pressure chamber communicates with the inflow side of the main valve, and the direction in which the outflow part of the hydraulic pressure chamber is closed against the hydraulic pressure is a first side passage communicating with the outflow side of the main valve via a second valve energized by the valve; A second side passage provided with the first valve and the negative pressure generating part communicates at one end with the inflow side of the main valve and at the other end with the outflow side of the main valve, and A side passage discharge pipe is provided on the downstream side of the side passage, and a second side passage is provided.
A liquid supply device in which a first valve is interlocked with a first valve by an interlocking means, characterized in that a closing body having a closing part that closes the tip of the side discharge pipe is slidably provided on the discharge pipe. liquid equipment.