JPS6112398Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pinch valve that is attached to an outflow portion of a container to drain liquid, etc. from the container.

Generally, this type of pinch valve has a tube made of a soft elastic material that allows liquid to flow out, and a trachea that draws gas into a sealed container.When the tube is pinched and released by a pinch mechanism, At the same time, the passage opening of the trachea is opened and closed by a stopper provided on the movable part of the pinch mechanism.

As an example of the conventional technology of this type of pinch valve,
There is an idea described in Japanese Utility Model Application Publication No. 54-58349. In this system, upper and lower partition plates 3, 3' are provided in the hand body 1, and a push-back rod 9 having a pressure-welding piece 6 is installed between them, and an elastic tube passes through the hole 7 of the push-back rod 9 by the pressure-welding piece 6. 5 and also operates a check valve 12 that opens and closes the lower end of an air supply pipe 11 provided on the upper partition plate 3.

As the check valve 12, the first embodiment shows a valve body that moves up and down, and the second embodiment shows an automatic valve made of an elastic material. However, with these valves, if the pressure on the liquid level in the can drops significantly for some reason (for example, when a high-temperature liquid cools down), a large pressure difference between the pressure and the atmospheric pressure will occur. Due to this pressure difference, the valve body floats in the first embodiment, and the opening naturally opens due to elastic force in the second embodiment. For this reason, there was a risk that the atmosphere would enter the can at unexpected times other than when the liquid was flowing out, causing oxidation phenomena and the like, and impairing the quality of the stored liquid.

This invention was made in view of the above-mentioned circumstances, and includes at least one of the opening of the flow path and the plug that closes the opening made of a soft elastic material, and the plug is configured to move in the direction of its closing movement. It is an object of the present invention to provide a pinch valve that is inexpensive and has reliable sealing performance by forming a slope that slopes downward toward the plug portion, and by forming an abutting opening that has a slope similar to the slope of the plug portion.

This invention will be explained in detail below based on illustrated embodiments.

FIG. 1 shows a vertical sectional view of the pinch valve according to this invention, in which a connecting pipe 4 is formed in the upper part of the casing 3, which is fitted into the outlet part 2 of the closed container 1 filled with liquid. This connecting pipe 4 has a bottom wall 5,
The bottom wall 5 is provided in parallel with a large-diameter outflow passage 6 through which fluid flows out and a small-diameter inflow passage 7 through which outside air is taken in.

An outflow tube 8 made of a soft elastic material such as vinyl chloride is fitted and suspended in the outflow path 6 via a bush 9. Further, a tube 10 made of the same material as the outflow tube 8 is inserted into the inflow channel 7,
The lower part 10a is made to project slightly downward from the lower opening of the inflow passage 7.

Directly below the connecting pipe 4, a valve chamber 11 is formed which extends in the horizontal direction. The valve chamber 11 has an upper wall formed by a part of the bottom wall 5 described above, and an outflow passage 6 and an inflow passage 7 communicate with the valve chamber 11.
Furthermore, a guide cylinder 12 communicating with the outside is formed on the lower wall of the valve chamber 11 facing the above-mentioned outflow passage 6, and the outflow tube 8 is inserted into this portion.

A pinch mechanism 13 is attached to the valve chamber 11, and the pinch mechanism 13 is operated by a spring 15 having a movable stopper 14 which can be slid horizontally within the valve chamber 11 interposed on its right side. The movable stopper 14 is moved to the left against the elastic force of the spring 15 by means of an operating lever 16 which is elastically biased to the right and pivoted to the left side of the movable stopper 14 via a pin 21. It becomes like you get it. In the middle part of the movable stopper 14,
When the movable stopper 14 is moved to the right by the spring 15, the stopper pin 17 moves halfway through the outflow tube 8.
The pressure piece 18 that clamps and closes the tube 1
Plug portion 19 that comes into contact with the lower surface of 0 and closes the inflow path 7
and Note that the stopper pin 17 is connected to the valve chamber 11.
The movable stopper body 14 is constructed and fixed therein, and passes through a horizontal elongated hole 22 formed in the middle part of the movable stopper body 14.

Further, the plug part 19 is formed with a slope that slopes downward in the direction of its closing movement (to the right), and the lower part 10a of the tube 10 with which it comes into contact is also formed with a slope similar to the slope of the plug part 19. ing. A trachea 20 made of a hard material is fitted and erected in the upper part of the tube 10, and its upper end opens into the space at the top of the container 1. The operating lever 16 is formed in an L-shape, and the lower portion 16a of the short side thereof is in contact with the lower wall of the left end of the valve chamber 11.

Since this invention has the above configuration, the operation lever 1
6 is rotated counterclockwise in the figure, its lower part 16a presses the left end lower wall of the valve chamber 11, and the reaction force causes the movable stopper 14 to move to the left against the elastic force of the spring 15. It will be moved.

As a result, the pressing piece 18 is moved to the stopper pin 17.
The clamping pressure blockage of the outflow tube 8 is released, and at the same time, the plug part 19 is removed from the lower part 10a of the tube 10.
The trachea 20 is opened.

This causes the liquid in the container 1 to flow through the outflow tube 8.
A volume of outside air corresponding to this outflow amount is sucked into the container 1 via the tube 10 and the trachea 20.

Next, when the operating lever 16 is released, the movable stopper 14 is moved to the right in the figure by the elastic force of the spring 15, and its pressing piece 18 comes close to the stopper pin 17 and pinches and closes the outflow tube 8. The plug part 19
comes into contact with the lower part 10a of the tube 10 and closes it. (Situation shown in Fig. 1) In this case, since the tube 10 is made of a soft elastic body, it conforms to the slope of the plug part 19 and compensates for slight irregularities in flatness and positional deviation. . The opening of the flow path is made of a hard material, and part of the plug is made of a soft elastic material (for example, by adhesive).
It can also be a structure.

This idea was constructed as explained above, so
Even if the pressure on the liquid level in the container drops significantly and a large pressure difference occurs between it and the atmospheric pressure, there is no risk that the opening of the channel will open and the atmosphere will flow in, unlike in the prior art. Rather, if a large pressure difference occurs,
This has the effect of increasing the airtightness.

In addition, when the opening is made of a soft elastic material, when a hard tube such as a trachea is inserted into the opening, the trachea can be easily inserted.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing an embodiment of the pinch valve according to this invention. DESCRIPTION OF SYMBOLS 1... Container, 2... Outflow part, 3... Casing, 4... Connection part, 5... Bottom wall, 6... Outflow path,
7...Inflow path, 8...Inflow tube, 9...Button, 10...Tube, 10a...Lower, 11
... Valve chamber, 12 ... Guide cylinder, 13 ... Pinch mechanism, 14 ... Movable stopper, 15 ... Spring, 16 ...
Operation lever, 16a... lower part, 17... stopper pin, 18... pressing piece, 19... plug part, 20...
...trachea, 21...pin, 22...long hole.

Claims (1)

[Scope of utility model registration request] A pinch valve having a flow path opening provided in a casing and a plug portion facing the opening,
At least one of the opening and the stopper is made of a soft elastic material, and the stopper is formed into a slope that slopes downward in the direction of closing movement of the stopper, and the opening that comes into contact with this is also formed on the stopper. A pinch valve that forms a slope similar to a slope.