JPS6323435B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a valve device used when pouring out internal fluid from a closed container. This relates to improvements to prevent this.

<Prior Art> When pouring liquid from a closed container, if the liquid drains poorly, it will drip off after the valve is closed, which is unfavorable both in terms of hygiene and appearance. Also, when drinking in a glass, if you pull the glass too quickly, the liquid will spill onto the tabletop. In such a pouring state, when used in an industrial device, there is also a drawback that it is difficult to adjust the pouring amount.

An example of a conventional device for solving this drawback is the invention described in Japanese Patent Application Laid-Open No. 153230/1983. This is done by closing the hole 6 of the valve seat 5 with the valve body 4 to stop the flow of liquid, and then pushing the valve body 4 further into the hole 6 from the closed position. Due to this displacement, the volume of the chamber 1d on the outflow port 1b side is increased compared to when the liquid is stopped, and by sucking in excess liquid, the valve improves liquid drainage. Then, the fitting operation of the valve body 4 is controlled by the diaphragm 3.
This is done by the displacement of

<Problems to be Solved by the Invention> However, it is structurally unreasonable to force the valve body 4, which has already been inserted into the hole 6, further into the interior, and this may cause liquid leakage. Therefore, it is considered difficult to commercialize it.

The present invention solves the above-mentioned problems and replaces the means for generating negative pressure after occlusion, thereby eliminating the problem of liquid leakage and improving liquid drainage. The purpose is to provide a valve device that does not.

<Means for Solving the Problems> In order to achieve this object, the present invention is configured as follows.

In other words, a valve is provided at the inlet of the fluid flow path in the valve box to open and close the valve, and the valve rod that operates this valve is a main valve rod, and the slave valve is thinner than the main valve rod and continues from it via a step. The slave valve rod has a two-stage structure consisting of a rod, and the slave rod slides through the valve, supports the valve by a sub spring interposed between its tip and the valve, and the upper end of the valve rod is attached to the valve. The piston at the top of the rod is connected to a diaphragm that partitions the hollow chamber, and the diaphragm is pressed against the opposite side of the valve by a main spring that is stronger than the sub spring, thereby constantly urging the slave valve rod in the direction of closing the valve. The valve device is characterized in that the hollow chamber on the branch side is connected to an external pressure source, and the hollow chamber on the valve side is connected to the outlet side of the fluid flow path through a small hole.

<Function> In this way, the valve stem has a two-stage structure, and after the inlet is closed by the valve, the valve stem moves further, thereby further displacing the diaphragm. For this reason, the negative pressure becomes larger, so that liquid drainage becomes even better.

<Example> Examples of the present invention will be described below based on the drawings.

A valve box 3 is attached to the opening 2 of a closed container 1 as shown in FIG. 1, and an inlet 41 of a fluid flow path 4 provided in the valve box 3 is opened and closed by a valve 5. A valve rod 6 for operating the valve 5 has a two-stage structure consisting of a main valve rod 61 and a slave valve rod 62 which is thinner than the main valve rod 61 and continues to it via a stepped portion 63. The slave valve rod 62 is slidably passed through the center of the valve 5 in the vertical direction, and a subsidiary spring 17 is interposed between the locking piece 16 at the tip of the slave valve rod 62 and the valve 5. Support from below. A piston 64 is provided at the upper part of the main valve rod 6, and its upper end is connected to a diaphragm 7 that partitions a hollow chamber 8. The piston 64 is fitted into the communication hole 9 connecting the fluid flow path 4 and the hollow chamber 8 via a guide 91 so as to be slidable in the vertical direction.

The diaphragm 7 partitions the hollow chamber 8 in the valve box 3 into a branch-side hollow chamber 82 and a valve-side hollow chamber 81 . A secondary spring 17 is placed between the diaphragm 7 and the guide 91.
A stronger main spring 10 is installed, which raises the valve 5 to close the inlet 41 and pushes the diaphragm 7 upward as shown in FIG.

An inflow tube 11a extending to the bottom of the closed container 1 is connected to the inflow port 41 of the fluid flow path 4, and the inflow tube 11a extending to the bottom of the closed container 1 is connected to
On one side, a flow path 12 is provided through which a pressurized medium, in this case air, flows. One end of the channel 12 is connected to a pressurized channel 121 in the closed container 1, and the other end is connected to a pressure source 13, here a pump 13. Furthermore, a branch passage 14 is provided in the flow passage 12, and one end of the branch passage 14 is connected to a hollow chamber 82 on the branch passage side. In addition, the valve side hollow chamber 81 and the fluid flow path 4
and the outlet 42 side thereof through the small hole 15. The outflow tube 11b is connected to the outflow port 42 of the fluid flow path 4.

With this configuration, when the pump 13 operates and sends air from the channel 12, it presses the liquid level and pushes up the liquid. At the same time, a part of the air flows from the branch passage 14 into the branch passage side hollow chamber 82 and presses the diaphragm 7 downward from above. When the diaphragm 7 is pressed downward, the diaphragm 7 and the main spring 10 are lowered, and the main valve rod 61 is lowered. When the main valve rod 61 is lowered, the sub spring 1
7 extends, and the stepped portion 63 comes into contact with the valve 5 and pushes it. When the step 63 pushes the valve 5, the valve 5 lowers and opens the inlet 41 of the fluid flow path 4. When the inlet 41 opens, the liquid pressed by the air passes through the fluid flow path 4 and flows through the outlet 42 into the outlet tube 11.
flows out to b. At this time, the diaphragm 7 is at the lowest stage as shown in FIG.

Next, when the pump 13 is stopped and the pressing force on the diaphragm 7 is released, the valve stem 6 and the diaphragm 7
is returned from the position shown in FIG. 2 to the position shown in FIG. 3 by the main spring 10 and the restoring force of the diaphragm 7 itself, and the valve 5 closes the outlet 41. However, since the main spring 10 is stronger than the sub spring 17, the restoring force of the main spring 10 causes the sub valve rod 61 to
compresses the sub spring 17 and further raises the valve stem 6 and diaphragm 7, resulting in the state shown in FIG. In this way, even after the inlet 41 of the fluid flow path 4 is closed by the valve 5, the diaphragm 7 is pushed up by the restoring force of the main spring 10 and rises. On the other hand, there is residual liquid near the outlet 42 of the fluid channel 4, and therefore, there is no communication between the outlet tube 11b and the outlet 42 of the fluid channel 4. Therefore, the volume of the valve-side hollow chamber 81 expands due to the upward displacement of the diaphragm 7, and since no air enters from the outside (the branch passage 14 does not communicate with the atmosphere), the valve-side hollow chamber 82 is under negative pressure. becomes. On the other hand, the tip of the outflow tube 11b is at atmospheric pressure. Therefore, the residual liquid is pushed by atmospheric pressure and sucked by negative pressure, so the residual liquid is sucked from the small hole 15 into the valve-side hollow chamber 81, and when it is retained in the upper part of the small hole 15, the atmospheric pressure balance with. In this way, the liquid drains better and there is no dripping.

By the way, even in the state shown in FIG. 4, the diaphragm 7 has not yet returned to its original position, so it is further displaced and returns to the initial state shown in FIG. This displacement further increases the negative pressure, which causes the liquid to be sucked even more strongly. In this embodiment, a pump is operated to pressurize air, but carbon dioxide gas sealed in a pressure cylinder may be used as the pressurizing medium.

<Effects of the Invention> As explained above, in the present invention, the valve stem has a two-stage structure, and in addition to the main spring, a weaker auxiliary spring is provided to support the valve. Therefore, after the inlet is closed by the valve, the diaphragm is displaced due to the contraction of the sub spring, and negative pressure is generated in the hollow part on the valve side. Prevents liquid from dripping. In this way, unlike the conventional device described above, in the present invention, the valve does not move further after closing, but the diaphragm is displaced only by the movement of the valve stem, so that the liquid remains reliably without the risk of leakage. This prevents liquid from dripping.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view showing the valve device of the present invention, Fig. 2 is a longitudinal sectional view showing the valve device of the present invention;
Figures 1 to 4 are longitudinal sectional views showing the movements of the valve and diaphragm in the same device. 1-Airtight container, 3-Valve box, 4-Fluid channel, 5-
Valve, 6-valve stem, 61-main valve stem, 62-subvalve stem, 6
3-Step part, 7-Diaphragm, 8-Hollow chamber, 10
-Main spring, 17-Secondary spring.

Claims (1)

[Claims] 1. A valve is provided at the inlet of the fluid flow path in the valve box to open and close the valve, and a valve stem for operating this valve is connected to the main valve stem and a secondary valve that is thinner than the main valve stem and continues through a step. It has a two-stage structure consisting of a valve stem, and the subordinate valve stem slidably passes through the valve, and the valve is supported by an auxiliary spring interposed between its tip and the valve, and the upper end of the valve stem is The piston at the top of the valve stem is connected to a diaphragm that partitions a hollow chamber, and the diaphragm is pressed to the opposite side of the valve by a main spring that is stronger than the sub spring, thereby constantly urging the slave valve stem in the direction of closing the valve. A valve device characterized in that the hollow chamber on the branch side of the chamber is connected to an external pressure source, and the hollow chamber on the valve side is connected to the outlet side of the fluid flow path through a small hole.