JPS6112396Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an on-off valve for a tank that stores fluid.

BACKGROUND ART As this type of on-off valve, one using a globe valve is conventionally known.

The biggest drawback of this conventional on-off valve is that liquid accumulates around the valve at the bottom of the tank. This is because, in this on-off valve, a valve seat for the valve body must be separately provided at the bottom of the tank, but the valve seat protrudes into the tank.
In other words, the valve seat protrudes into the tank,
This creates a level difference between the tank bottom and the fluid outlet. Fluid would accumulate in this step and would not flow out forever, sometimes resulting in deterioration.

Particularly, when fluids that have deteriorated in quality as described above are left as they are and new fluids are added and mixed, some of the fluids may cause chemical reactions, and eliminating the liquid pools has been a major problem.

Further, when a globe valve is used, a sufficient opening area cannot be secured unless the vertical stroke of the valve body is large. However, if the vertical stroke is increased, the handle must be turned many times when opening and closing, resulting in a lack of speed. This has also been an obstacle when automating the opening and closing of the valve.

This invention eliminates the above-mentioned conventional drawbacks, and each of the illustrated embodiments will be described below.

In the first embodiment shown in FIGS. 1 and 2, a hole 3 is formed in the bottom 2 of a funnel-shaped tank 1.
A thick portion 4 is formed around this hole 3, and the lower surface of this thick portion 4 is made horizontal.

Further, the housing 5 is inserted into the hole 3 from below, and the portion that protrudes into the tank 1 has a trapezoidal cross section, while the portion that protrudes below the tank 1 is provided with a flange 6. This flange 6 is tightly fitted to the lower surface of the thick walled portion 4, and by fastening them with bolts 7, the housing 5 is firmly fixed to the bottom 2 of the tank 1.

A fluid port 9 with a valve seat 8 around it is formed in a portion of the housing 5 that protrudes into the tank 1.

When the housing 5 is fixed to the tank 1 as described above, the fluid port 9 is designed to prevent a step from being formed between the fluid port 9 and the inner bottom surface of the tank 1.

A ball-shaped rotary valve body 10 is incorporated into the housing 5 fixed to the tank 1, and a support ring 12 provided with a thrust seat 11 is screwed into the rotary valve body 10 from below, so that the valve body 10 can be rotated. It is held in

The rotary valve body 10 has the same number of switching holes 13 as the fluid ports 9, and the switching holes 13
An outflow hole 1 that further communicates with the lower part of the housing 5
4 is formed.

When the switching hole 13 coincides with the fluid port 9, there is no difference in level between the switching hole 13 and the fluid port 9. That is, the inner bottom surface of the tank, the fluid port 9, and the switching hole 13 are continuous without any difference in level between them.

Conventionally, special members such as jigs were required to attach the on-off valve to the tank, but in this invention, the flange 6 is formed on the housing 5 as described above, so there is no need for special parts like the conventional one. parts are no longer needed.

On the other hand, the discharge pipe 15 constituting the discharge passage of this invention
The upper end opening is fitted into the lower end of the housing 5, and a flange 16 formed around the upper end is fixed to the flange 6 with bolts 17.

Although the discharge pipe 15 is slightly bent in the middle, a through hole 18 is formed in the vertical direction from the center of the valve body 10.

A shaft 19 is inserted from the outside of the through hole 18, and the upper end of the shaft 19 is screwed into the rotary valve body 10. A gland packing 20, a packing presser ring 21, and a packing presser 22 are attached to the outside of the through hole 18, and a handle 23 is fixed to the lower end of the shaft 19.

Note that numerals 24 and 25 in the figure are gaskets.

However, when the handle 23 is turned now, the rotary valve body 10 also rotates, and the switching hole 13 and the fluid port 9 are aligned or misaligned, so that the valve opens and closes.

The angle at which the handle 23 is rotated varies depending on the number of fluid ports 9 and switching holes 13, but it is clear that it is not necessary to rotate the handle 23 by at least 360 degrees.

In this way, since the rotation angle of the handle is small, it becomes easier to automate the opening and closing of the valve.

Furthermore, when the valve is open, there is no difference in level between the inner bottom surface of the tank 1, the fluid port 9, and the switching hole 14 as described above, so the fluid does not accumulate at the bottom of the tank 1.

Further, since the rotary valve body 10 is completely held within the housing 5, the discharge pipe 15 can be replaced at any time by keeping it in the closed state, and the outlet direction of the discharge pipe 15 can be easily changed. Can be done.

Furthermore, when the tank 1 is to be closed for a long period of time, the discharge pipe 15 and the shaft 19 can be removed and a lid 26 shown in FIG. 2 can be attached. Further, in the event that the valve breaks down, the housing 5 and the rotary valve body 10 can be replaced while being integrated.

The second embodiment shown in FIG. 3 has a coil-shaped conductor 27 between the upper end of the rotary valve body 10 and the housing 5.
A spring 29 is interposed between the support ring 12 and the thrust seat 11 with a washer 28 interposed therebetween.

The coil 27 and spring 28 are connected to the valve seat 8
This is particularly effective when the thrust seat 11 is made of synthetic resin.

That is, if the valve seat 8 and the thrust seat 11 are made of synthetic resin, they will melt at high temperatures and the rotary valve body 10 will become electrically charged.

In particular, if the valve seat 8 or thrust seat 11 melts in the event of a fire, the fluid in the tank will flow out, which is very dangerous.
If this is provided, the rotary valve body 10 will be automatically pushed up and maintained in the closed state, thereby avoiding the above-mentioned danger.

Further, the spring 29 is effective even when the valve seat 8 and the thrust seat 11 are made of metal.

That is, the rotary valve body 10 is brought into close contact with the valve seat 8, and even if liquid enters between the valve seat 8 and the rotary valve body 10, the valve body 10 can be resiliently retracted against the spring 28. The rotation of the valve body 10 becomes smooth.

In this embodiment, the rotary valve body is shaped like a ball, but it is clear that it may be shaped like a truncated cone or a cylinder.

As is clear from the above explanation, the scope of claims No.
According to the on-off valve described in item (1), the inner bottom surface of the tank, the liquid port, and the switching hole are continuous without creating a step between them, so that so-called liquid pooling does not occur. Furthermore, the rotation angle for rotating the rotary valve body is small, making automation easier.

According to the on-off valve recited in claim (2), no special member is required to attach the valve to a tank.

According to the on-off valve described in claim (3), not only can the direction of the outlet of the discharge pipe etc. be changed or removed with the valve closed, but also a separate cover can be installed after the discharge pipe is removed. can be installed.

Additionally, the rotary valve body can be replaced together with the housing.

According to the on-off valve described in claim (4), the rotary valve body is not charged with electricity even if the valve seat and the like are made of synthetic resin.

According to the on-off valve described in claim (5), the rotary valve body is in close contact with the valve seat, and even if fluid or the like enters between them, the rotary valve body can rotate smoothly.

Further, if the valve seat or the like is made of synthetic resin, even if it melts at high temperatures such as during a fire, the valve can remain closed.

[Brief explanation of the drawing]

Drawings 1 and 2 show the first embodiment,
Figure 1 is a cross-sectional view with the discharge pipe installed, Figure 2 is a cross-sectional view with a lid installed in place of the discharge pipe,
FIG. 3 is a sectional view of a main part showing the second embodiment. 1...tank, 2...bottom, 5...housing,
6...Flange, 9...Fluid port, 10...Rotary valve body, 13...Switching hole, 27...Conductor, 29...
spring.

Claims (1)

[Claims for Utility Model Registration] (1) A housing provided at the bottom of a funnel-shaped tank and having a required number of fluid ports, and rotatably held within this housing,
A rotary valve body having the same number of switching holes as the fluid ports and an outflow hole for guiding the switching holes to a discharge passage, and a step is formed between the inner bottom surface of the tank, the fluid ports, and the switching holes. A tank opening/closing valve that can be connected continuously without any problems. (2) The tank according to claim (1), wherein the lower end of the housing protrudes below the tank, a flange is formed on this protruding portion, and the flange is fixed to the lower surface of the tank with bolts or the like. on-off valve. (3) Screw the support ring into the housing from below,
The tank opening/closing valve according to claim (1) or (2), wherein the rotary valve body is held within the housing by this support ring. (4) Claims (1) to (3) above, wherein a conductor is interposed between the upper end of the rotary valve body and the housing.
A tank opening/closing valve as described in any of paragraphs. (5) The tank opening/closing valve according to claim (3), wherein a spring is interposed between the support ring and the rotary valve body.