JPH0653800U - Liquid container - Google Patents

Abstract

(57) [Summary] [Structure] Pressurized position that opens the inlet port 4 to the inside of the container body 2 and closes the replenishment port 5, and refill position that closes the inlet port 4 to the inside of the container body 2 and opens the replenishment port 5. And a valve member 10 that can be selectively positioned. A pressure difference between the internal pressure and the external pressure of the container body 2 is applied to the valve member 10 so that the valve member 10 at the pressurizing position does not move. [Effect] The refill port is not opened while the gas pressure is acting inside the container body, and the valve member is not accidentally switched.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a liquid container used for supplying a liquid such as lubricating oil, hydraulic oil for a hydraulic actuator, auxiliary fuel, digestive liquid, etc. by the pressure of a pressurized gas.

[0002]

[Prior art]

 A liquid container having a container body for containing a liquid, a pressurized gas inlet port, a liquid outlet port, a liquid supply port, a lid for opening and closing the supply port, and a three-way valve has been conventionally used. Has been. The inlet port is connected to a pressurized gas supply source through a three-way valve, which opens the inside of the container body and the pressurized gas supply source and connects the inside and outside of the container body. It is possible to selectively switch between a closed position and a position that closes the inside of the container body and the pressurized gas supply source and opens the inside and outside of the container body.

According to the conventional liquid container, when the liquid is supplied by switching the three-way valve, the inside of the container main body and the pressurized gas supply source are communicated with each other, and the gas pressure causes the liquid in the container body to flow out from the outlet port. I was letting it. In addition, when replenishing the liquid, the inside and outside of the container body were communicated with each other by a three-way valve to release the gas in the container body, and then the lid of the replenishment port was opened to replenish the liquid in the container body.

[0004]

[Problems to be solved by the device]

 With conventional liquid containers, forget to switch the three-way valve when refilling the liquid, and open the cover of the refill port with gas pressure applied inside the container body to damage the cover. However, there was a problem that pressurized gas was released from the supply port to the atmosphere more than necessary. There was also the problem of accidental switching of the three-way valve due to accidental operation, such as during work to remove the lid.

An object of the present invention is to provide a liquid container which can solve the above-mentioned problems of the conventional technology.

[0006]

[Means for Solving the Problems]

 The feature of the present invention is that the container main body for containing the liquid, the inlet port for the pressurized gas, the outlet port for the liquid, the liquid supply port, and the selective positioning at the pressurization position and the supply position. The valve member opens in the pressurization position between the inside of the container body and the inlet port and closes the inside of the container body and the supply port, and in the supply position, the inside of the container body. The inside of the container is closed between the inlet port and the replenishing port, and the valve member at the pressurization position is designed so that the differential pressure between the internal pressure and the external pressure of the container prevents the valve member from moving. There is a point that works.

[0007]

[Action]

 According to the configuration of the present invention, when the valve member is in the refill position and the inside of the container body is opened between the refill port, the inside of the container body and the inlet port are closed, so that the gas inside the container body is closed. The supply port never opens with pressure applied. In addition, since the differential pressure between the internal pressure and the external pressure of the container body acts to prevent the valve member from changing its position at the pressurizing position, the valve member can be easily positioned unless the refilling port is closed by actively switching. Never changes to.

[0008]

【Example】

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

The liquid container 1 shown in FIG. 1 includes a container main body 2 that stores a liquid L. The container body 2 is composed of a cylindrical lower member 2a and an upper member 2b fitted into the upper end opening of the lower member 2a via a seal member 3. A pressurized gas inlet port 4 and a liquid supply port 5 are formed in the upper member 2b, and an outlet port 7 of the liquid L is formed in the lower member 2a. Female screw holes for pipe connection are formed at the outer end of the inlet port 4 and the outer end of the outlet port 7. A supply source 30 of a pressurized gas such as a nitrogen cylinder is connected to the inlet port 4 via a pipe, a regulator valve, a safety valve and the like. The outer end of the replenishment port 5 communicates with a replenishment liquid reservoir 2c formed in the upper portion of the upper member 2b, and the upper opening of the replenishment liquid reservoir 2c is detachably attached to the upper member 2b with a bolt 31. It is covered by a lid 32. Further, an air vent hole 33 is formed in the upper member 2b so as to communicate between the outer end and the inner end of the replenishment port 5 with the replenishment liquid reservoir 2c. A female screw hole 2d for connecting a pipe, which communicates with the replenishing liquid reservoir 2c, is formed in the upper member 2b, and is closed by a plug 35 in this embodiment. The outlet port 7 is connected to a supply destination of the liquid L via a pipe.

A vertical through hole 6 penetrating the upper member 2 a is formed, and a pair of upper and lower peripheral grooves 8 and 9 are formed on the inner periphery of the through hole 6, and the inlet port 4 is formed in the upper peripheral groove 8. The inner end of the refill port 5 communicates with the lower circumferential groove 9. A tubular valve member 10 is inserted into the through hole 6 so as to be vertically movable. Four seal rings 11, 12, 13, 14 are fitted on the outer periphery of the valve member 10, a peripheral groove 10a is formed between the lower two seal rings 13, 14, and a lower end is formed inside. A flow path 10b is formed, and a through hole 10c that connects the circumferential groove 10a and the flow path 10b is formed.

As shown in FIG. 1, the valve member 10 closes the inside of the container body 2 and the inlet port 4 and also surrounds the inside of the container body 2 and the supply port 5 with a circumferential groove 10 a and a flow path. 10b and the through hole 10c, and the refill position, and as shown in FIG. 2, the inner portion of the container body 2 and the inlet port 4 are opened through the circumferential groove 10a, the flow passage 10b, and the through hole 10c. The position can be selectively changed to a pressurizing position that closes the inside of the main body 2 and the supply port 5. In the supply position, the two seal rings 11 and 12 above the outer periphery of the valve member 10 are located above and below the peripheral groove 8 on the inner periphery of the through hole 6 communicating with the inlet port 4. A seal ring 15 is fitted on the lower end of the inner periphery of the through hole 6.

The valve member 10 is formed with a female screw hole 40 having an upward opening, a male screw 41 is screwed into the female screw hole 40, and a cover 42 covering the male screw 41 is attached to the upper member 2b by a bolt 43. The male screw 41 is rotatably inserted into the cover 42, and the cover 42 is sandwiched by a flange 41a formed on the outer periphery of the male screw 41 and a retaining ring 44 fitted on the outer periphery of the male screw 41. As a result, the male screw 41 is rotatable but axially immovable. Further, a stopper 45 protruding outward in the radial direction is integrally formed on the upper portion of the valve member 10, and the stopper 45 abuts on a rib 42a protruding inward from the inner periphery of the cover 42, whereby the valve member 10 Is made non-rotatable, and the stopper 45 contacts the upper surface of the upper member 2b and the inner surface of the cover 42, thereby restricting the vertical movement range of the valve member 10. As a result, by rotating the male screw 41, the valve member 10 moves vertically within a certain range, and its upper end position is the pressurizing position and its lower end position is the replenishing position. In addition, a through hole 42c that communicates the inside and the outside of the cover 42 is formed, and the atmospheric pressure acts on the upper portion of the valve member 10. A coupling portion 41b with the tool is formed at the upper end of the male screw 41.

According to the above configuration, as shown in FIG. 2, the valve member 10 is placed at the pressurizing position to open the inside of the container body 2 and the inlet port 4 and the inside of the container body 2 and the supply port 5. The liquid L in the container body 2 can be caused to flow out from the outlet port 7 by closing the gas pressure. Further, as shown in FIG. 1, the valve member 10 is placed in the refill position to close the interior of the container body 2 and the inlet port 4 and open the interior of the container body 2 and the refill port 5, This can be done by removing the gas in the container main body 2, whereby the lid 32 is opened and the liquid L is injected into the replenishment liquid reservoir 2c, whereby the liquid L can be replenished into the container main body 2 from the replenishment port 5. it can. The cross-sectional area of the flow path 10b formed in the valve member 10 is made large enough to allow air to flow even during liquid replenishment.

During replenishment of the liquid L, the inside of the container body 2 and the inlet port 4 are closed, so that the replenishment port 5 cannot be opened while the gas pressure acts on the inside of the container body 2. Absent. Further, since the differential pressure between the internal pressure and the external pressure of the container body 2 acts so as to prevent the position change of the valve member 10 at the pressurization position, the male screw 41 does not rotate when vibration or the like acts. The valve member 10 does not easily change its position. Further, according to the above-described embodiment, the lower end surface of the valve member 10 is located below the lower surface of the upper member 2b during liquid replenishment, and the liquid surface L'of the liquid L in the container body 2 is below the valve member 10. Since it is not located above the end surface, the position of the liquid surface L'in the container body 2 can be made constant.

The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the valve member 10 moves vertically but may move laterally. Further, the replenishment liquid reservoir 2c is connected to the pipe via the female screw hole 2d, and the replenishment port 5 is connected to the pipe. You may make it supply a liquid through.

[0016]

[Effect of device]

 According to the liquid container of the present invention, since the refill port does not open while the gas pressure is acting inside the container body, the cover of the refill port is damaged or the pressurized gas is released into the atmosphere more than necessary. It is possible to prevent it. Further, it is possible to prevent the valve member from being accidentally switched due to vibration or erroneous operation.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a liquid container according to an embodiment of the present invention during replenishment.

FIG. 2 is a cross-sectional view of a liquid container according to an embodiment of the present invention when pressurized.

[Explanation of symbols]

 2 Container body 4 Inlet port 5 Supply port 7 Outlet port 10 Valve member

Claims (1)

[Scope of utility model registration request] 1. A container body for containing a liquid, an inlet port for pressurized gas, an outlet port for liquid, a liquid supply port, and a valve member that can be selectively positioned between a pressurizing position and a supplying position. The valve member opens between the inside of the container body and the inlet port in the pressurizing position and closes between the inside of the container body and the supply port, and the inside of the container body and the inlet port in the supply position. A liquid container in which the space is closed and the inside of the container body is opened between the replenishment port, and the differential pressure between the internal pressure and the external pressure of the container body acts on the valve member at the pressurizing position to prevent movement of the valve member.