JP2788704B2 - Filling structure in liquid storage container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filling structure of a container for storing a liquid such as liquefied gas or kerosene, and in particular, to replenish the liquid from outside the container according to the level of the liquid stored inside the container. The present invention relates to a filling structure in a liquid storage container in which the pressure is controlled.

[0002]

2. Description of the Related Art A float which rises and falls according to the height of a stored liquid (hereinafter referred to as a liquid level) is provided in a container, and this float is provided with a function as a valve opening / closing actuator to supply liquid. At times, filling structures in containers intended to prevent overfilling of liquids are widely and generally known.

FIG. 2 and FIG. 3 schematically show a filling structure in a liquid storage container. This container 60 is also called, for example, a ground bulk container, and has a liquid filling port 61 on the side of the container 60, and supplies the liquid L into the container 60 therefrom. Further, a fulcrum 6 is provided inside the container 60.
A float 63 is attached rotatably around 2, and a valve 66 for opening and closing a liquid inlet 65 to the inside of the container 60 is provided on an arm 64 of the float 63 according to the position of the float 63 in the container. .

[0004] The effect is, when filling the liquid from the outside,
When the float 63 inside the container 60 gradually rises with the rise of the liquid level, the arm 64 rotates around the fulcrum 62, and the valve 66 closes the liquid inlet 65, so that the liquid L can be prevented from being overfilled. It has become.

[0005]

However, since the container 60 has a structure in which the liquid inlet 65 is gradually closed in accordance with the gradually changing height of the float 63 during liquid replenishment, it is used as an inflow control valve. The opening / closing response cannot be said to be high, and the filling of the liquid cannot be instantaneously interrupted due to the liquid filling pressure and liquid filling speed at that time, or the state of the liquid level, and the liquid storage in the container 60 cannot be stopped. The amount tends to vary.

[0006] In addition, the valve 66 is usually made of a metal plate coated with rubber packing, and almost the entire area is immersed in a liquid. There is.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is possible to instantaneously shut off the supply of liquid at a desired place, to reduce the variation in the amount of liquid to be filled, and to reduce the valve portion. It is an object of the present invention to provide a liquid storage container that can reduce the degree of deterioration over time.

[0008]

In order to achieve the above object, the present invention according to claim 1 has a liquid filling port and stores the liquid in a container connected to a consuming facility through a pipe. A filling structure in a liquid storage container configured to control supply of LPG supplied from outside the container via the liquid filling port according to a liquid level of LPG as a liquid to be filled, wherein A valve body urged in a direction to close the mouth, a liquid level detecting unit provided in the container and detecting a liquid level in the container, and a thin tube and a pressure reducing pressure controlling unit provided in the container A decompression chamber connected to the liquid level detection unit via a decompression pressure adjusting mechanism, an atmospheric pressure chamber air-tightly connected to the decompression chamber via a diaphragm, and connecting the diaphragm and the valve body. , By the displacement of the diaphragm by the valve body Characterized in that it comprises a lever for opening and closing the fluid passage.

According to a second aspect of the present invention, the pipe connecting the container and the consuming equipment is provided with a pressure regulator as pressure adjusting means, and the pipe downstream of the pressure regulator is provided. And the decompression chamber is connected by a sub-pipe.

[0010]

According to the first aspect of the present invention, if the liquid level of LPG in the container has not reached the liquid level detecting unit set at a predetermined height, the pressure chamber and the atmospheric pressure chamber are connected. The internal pressure is maintained at a predetermined balance, and a lever connected to the diaphragm presses a valve element provided at the liquid filling port. As a result, the valve element moves in the valve opening direction against the urging force, and the valve opening state can be reliably maintained.

On the other hand, when the supply of LPG into the container reaches a predetermined amount and the liquid level of the LPG reaches the liquid level detecting section, the LPG
Enters the decompression chamber through the capillary due to the capillary phenomenon, and a sharp pressure rise occurs inside the chamber. As a result, the diaphragm is displaced to the atmospheric pressure chamber side, the pressing of the lever by the lever is released, the valve rapidly moves by the urging force and closes, and the filling of LPG is momentarily shut off. it can.

According to the second aspect of the present invention, since the pipe connecting the container and the consuming equipment is connected to the decompression chamber via the sub-pipe, the gas phase and the liquid generated in the decompression chamber are connected. No phase LPG is released into the atmosphere.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a filling structure for a liquid storage container according to the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, a housing 3 having a liquid filling structure is fixed to a liquid filling port 2 formed outside a container 1 for storing LPG by a bolt (not shown). The housing 3 has a vertical liquid passage 4 whose lower end communicates with the container 1,
A horizontal liquid passage 5 communicating with the upper end of the liquid passage 4
Are formed.

A supply pipe extending from a bulk lorry (liquid carrier) (not shown) is connected to a distal end of the liquid passage 5 via a connection fitting 6. A check valve 7 is provided at the inlet of the liquid passage 5, and is automatically opened when the supply pipe is connected and closed when the supply pipe is disconnected. A valve seat 8 is provided in the fluid passage 5 near the connection with the fluid passage 4, and an overfilling prevention valve 9 is provided opposite the valve seat 8. A compression coil spring 11 is stretched between the overfill prevention valve 9 and a spring receiver 10 fixed to the inlet side in the fluid passage 5.
Abuts on the valve seat 8 to urge the valve to close.

Further, an externally actuated ball valve 12 for controlling the flow of liquid by an operator is mounted at an intermediate portion of the liquid passage 4 in the vertical direction. The ball valve 12
A rotary valve body 13 that communicates with and shuts off the upstream and downstream fluid passages 4 by rotating within the liquid passage 4, and a handle 14 that is connected to and rotates the rotary valve body 13.
And FIG. 1 is in a communication state.

A decompression chamber 15 is provided in the lower part of the housing 3.
Atmospheric pressure chambers 16 are provided at the upper portions, respectively, and a diaphragm 17 is attached between the decompression chamber 15 and the atmospheric pressure chamber 16. The outer periphery of the diaphragm 17 is located in the decompression chamber 15.
And at the boundary between the atmospheric pressure chamber 16 and the air pressure chamber 16. A compression coil spring 19 is provided between the diaphragm 17 and a spring receiver 18 fixed to the inner periphery of the atmospheric pressure chamber 16.
The diaphragm 17 is held at a position where the urging force of the spring 19 and the atmospheric pressure are equal to the pressure in the decompression chamber 15.

A safety valve 20 is provided at the center of the diaphragm 17, and a vent 21 communicating with the atmosphere is formed in the atmospheric pressure chamber 16. A lower end of a connecting member 22 projecting into the atmospheric pressure chamber 16 is fixed near the center of the diaphragm 17.
One end of an L-shaped first lever 24 is rotatably connected via 3. The first lever 24 is connected to the housing 3
Are rotatably supported by a support shaft 25 provided at the center. The other end of the first lever 24 is connected to one end of a rod 26 slidably and horizontally slidably mounted on the housing 3. The other end of the rod 26 projecting into the liquid passage 5 is connected to the other end of the rod 26. , Is connected to the overfilling prevention valve 9.

At the bottom of the decompression chamber 15, a decompression pressure adjusting mechanism 27 is provided.
Is provided, and the pressure reducing / pressure adjusting mechanism 27 is provided in the housing 2.
Liquid level detection unit 2 through a thin tube 28 formed in the vertical direction
9 in communication. The pressure-reducing pressure adjusting mechanism 27 includes a valve seat 30, a valve element 31, and a compression coil spring 32, and a rod 33 provided integrally with the valve element 31 is a pressure-reducing chamber 1.
5 protrudes. A second lever 35 whose one end is rotatably supported by a support shaft 34 is provided in the decompression chamber 15, and the upper end of the rod 33 contacts the vicinity of the support shaft 34 of the second lever 35. The tip of the second lever 35 is connected to the safety valve 20.

The liquid level detecting section 29 has a lower end opened in a cone shape, and the lower surface is positioned at the liquid level when the liquid level in the container 1 reaches a predetermined height. Further, the container 1 is connected to a consumption facility (not shown) by a main pipe 36, and the main pipe 36 is provided with a pressure regulator 37.
Further, the downstream side of the pressure regulator 37 of the main pipe 36 and the decompression chamber 1
5 is connected by a sub pipe 38.

Next, the operation of the embodiment constructed as described above will be described. When a supply pipe for supplying the liquid gas on the tank lorry side is connected to the liquid passage 5 through the connection fitting 6,
The check valve 7 is pushed down and opens automatically. When the supply pipe is removed, the check valve 7 automatically closes and the container 1
Prevents the release of LPG in the interior. After connecting the supply pipe to the liquid passage 5, the handle 14 is manually operated,
When the ball valve 12 is opened, the container 1 is filled with LPG. When it is confirmed that the filling has been completed, the ball valve 12 is closed immediately, and this state is maintained until the next filling.

When the liquid level of the LPG in the container 1 is equal to or lower than a predetermined height and has not reached the liquid level detecting section 29,
The PG enters the decompression chamber 15 in a gaseous state. At this time, the pressure-reducing pressure adjusting mechanism 27 operates normally, and the sum of the atmospheric pressure and the urging force of the spring 19 becomes equal to the pressure in the pressure-reducing chamber 15. The pressure when the gas was not used was 350 mmH ₂
O, the first lever 24 connected to the diaphragm 17 is at the position shown by the solid line in FIG. 1, and presses the overfilling prevention valve 9 via the rod 26 against the urging force of the spring 11. Keep the valve open.

When the LPG in the container 1 is filled with a predetermined amount of liquid, the liquid level reaches the liquid level detecting section 29, and the LPG rises in the narrow tube 28 by a capillary phenomenon and passes through the pressure reducing pressure adjusting mechanism section 27. Into the decompression chamber 15. As a result, a small amount of liquid-phase LPG is vaporized in the decompression chamber 15, and the pressure in the decompression chamber 15 sharply increases. Then, the diaphragm 17 is raised to rotate the first lever 24 counterclockwise to reach a position shown by a two-dot chain line in FIG. 1, and the overfilling prevention valve 9 contacts the valve seat 8 to close the liquid passage 5. Close the valve. At the same time, the second lever 35 also rotates counterclockwise, the rod 33 rises, and the pressure-reducing pressure adjusting mechanism 27 also closes. At this time, the pressure in the decompression chamber 15 becomes 70
When the pressure exceeds 0 mmH ₂ O, the safety valve 20 operates to release gas to the outside. The overfilling prevention valve 9 keeps the closed state until the release of the gas from the safety valve 20 to the outside is completed. During this time, the lever 14 of the valve 12 is closed by rotation and the connection fitting 6 is removed to perform the filling. Complete.

The pressure-reducing and pressure-regulating mechanism 27 is in a state in which gas can always pass during gas consumption, and is adjusted to 280 ± 50 m by a pressure regulator 37 provided in the main pipe 36.
The sub-pipe 38 (280-33) is connected to the mH ₂ O low pressure gas phase line.
Gas flows out preferentially via 0 mmH ₂ O).

According to this embodiment, since the liquid level in the container 1 is detected by the diaphragm 17 without using the float, the gas supply when the tank is full can be instantaneously shut off, and the filling accuracy can be reduced. Improvement and reliability can be improved. Further, L has no effect on the gas consumption state.
PG can be filled into the container 1 and a large amount of LPG can be prevented from being released into the atmosphere. In addition, the deterioration with time of the valve portion can be reduced.

[0026]

As described above, according to the present invention,
Since the diaphragm is used as a means for detecting the liquid level in the container, the accuracy of filling the container with the liquid can be improved, and the reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional front view of a main part showing a configuration of a first embodiment of the present invention.

FIG. 2 is an explanatory view showing an example of a conventional float valve structure.

FIG. 3 is an enlarged explanatory view of a main part of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Fluid filling port 4, 5 Fluid passage 9 Valve body 15 Decompression chamber 16 Atmospheric pressure chamber 17 Diaphragm 26 Lever 27 Decompression pressure adjustment means (decompression pressure adjustment part) 28 Thin tube 29 Liquid level detection means (liquid level detection part) 36 Piping 37 Pressure adjusting means (pressure regulator) 38 Secondary piping

Continuation of the front page (56) References JP-A-3-69500 (JP, A) JP-A-62-287899 (JP, A) JP-A-1-147999 (JP, U) JP-A-60-89199 (JP, A) (U, U) 58-65298 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B67D 5/372 B65B 3/30

Claims (2)

(57) [Claims] 1. A container having a liquid filling port, which is supplied from outside the container via the liquid filling port according to the liquid level of a liquid stored in a container connected to a consuming facility via a pipe. A filling structure in a liquid storage container configured to control the supply of the liquid to be performed, wherein a valve body provided in the liquid filling port and urged in a direction to close a fluid passage is provided in the container. A liquid level detecting means for detecting the liquid level in the container, a decompression chamber connected to the liquid level detection means via a thin tube and a decompression pressure regulating means provided in the container, and a gas-tight chamber through the diaphragm to the decompression chamber. Connected atmospheric pressure chamber, the diaphragm and the valve body,
And a lever for opening and closing the fluid passage by the valve element by displacement of the diaphragm. 2. A pressure adjusting means is provided in the pipe connecting the container and the consumer equipment side, and the pipe on the downstream side of the pressure adjusting means and the decompression chamber are connected by a sub pipe. The filling structure for a liquid storage container according to claim 1, wherein: