JPH09133228A - Sanitary valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the residue of a flow-in hole of a sanitary valve so as to prevent the contamination to be generated by the residue in a sanitary valve, in which a diaphragm is driven forward and backward by an actuator so as to open and close a valve seat, by horizontally arranging a flow-in hole, and on the other hand, inclining the valve seat. SOLUTION: In a valve body 8, a flow-in hole 1 and a flow-out hole 2 are arranged in parallel with each other so that the flow-in hole 1 is arranged over the flow-out hole 2, and on the other hand, a downstream end of the flow-in hole 1 is formed with a valve seat 3, which is inclined in relation to the flow-in hole 1, and both the holes 1, 2 are communicated with each other by a communication hole 24. The valve seat 3 is provided so as to be covered with a diaphragm 4, and the diaphragm 4 is driven forward and backward by an actuator 5 so as to open and close the valve seat 3 through the diaphragm 4. Since the flow-in hole 1 side of the diaphragm 4 is formed flat, the generation of puddle can be prevented. Furthermore, since the valve seat 3 is inclined in relation to the flow-in hole 1, a space for a sanitary valve can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanitary valve that causes a fluid to flow out or shut off, and requires a certain strict quality such as ultrapure water, sterile water, and culture solution used in the fields of pharmaceutical manufacturing, food manufacturing, etc. The present invention relates to a sanitary valve used for flowing out or shutting off the fluid to be discharged.

[0002]

2. Description of the Related Art Conventionally used sanitary valves are shown in FIGS. In FIG. 2, a valve seat 103 is formed between the inflow hole 101 and the outflow hole 102, and
This is a sanitary valve in which 3 is provided so as to be covered by the diaphragm 104, and the diaphragm 104 is driven forward and backward by the actuator 105 to open and close the valve seat 103 by the diaphragm 104.

In FIG. 3, a valve seat 203 is formed between an inflow hole 201 and an outflow hole 202, the valve seat 203 is provided so as to be covered by a diaphragm 204, and the diaphragm 204 is gripped by a grip 206 and rotated. It is a sanitary valve that opens and closes the valve seat 203 with a diaphragm 204.

[0004]

In the sanitary valve of FIGS. 2 and 3, the inflow holes 101 and 201 and the outflow holes are arranged in a straight line.
Providing rising portions 107 and 207 between 102 and 202,
The valve seats 103 and 203 are formed. So the inflow hole 101
The liquid in the inflow holes 101 and 201 is blocked by the rising portions 107 and 207 and does not flow out to the outflow holes 102 and 202 even if the pipe members 108 and 208 having the 201 and outflow holes 102 and 202 are slightly inclined.

As described above, the sanitary valve pipe members 108 and 208
The liquid in the inflow holes 101 and 201 does not flow out to the outflow holes 102 and 202 when it is horizontal or slightly tilted. Cause. In addition, products (chemicals, beverages, etc.)
The liquid itself also stays, waste is generated in the staying amount, and a large loss occurs in an expensive liquid.

In order to solve such a problem, the side of the inflow holes 101 and 201 of the pipe members 108 and 208 are set vertically or at 45 °.
It must be installed at an angle, mainly in space,
In some cases, there are restrictions on piping, and the entire device that uses the sanitary valve may become large, or unnecessarily long piping may be required.

[0007]

In view of the above-mentioned circumstances, the present invention provides a sanitary valve with almost no inclination of the piping member so that the fluid in the inflow hole can completely flow out to the outflow hole. In a sanitary valve in which a valve seat is formed between the inflow hole and the outflow hole, the valve seat is covered by a diaphragm, and the diaphragm is opened and closed by an actuator to open and close the valve seat, the inflow hole is made horizontal. A sanitary valve is provided in which the valve seat is arranged and formed so as to be inclined with respect to the horizontal, the inflow hole is penetrated to the valve seat, and a flat diaphragm is provided.

When the pipe member is installed so that the inflow hole is horizontal, the valve seat does not rise above the bottom of the inflow hole, so that no liquid pool occurs.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below based on a specific embodiment shown in FIG. In FIG. 1, the inflow hole 1 and the outflow hole 2 are parallel to the valve body 8, and the inflow hole 1 is arranged above the outflow hole 2. At the downstream end of the inflow hole 1, the inflow hole 1
A valve seat 3 that is inclined with respect to is formed, and the inflow hole 1 and the outflow hole 2 are communicated with each other by an oblique communication hole 24. The valve seat 3 is provided so as to be covered with the diaphragm 4, and the diaphragm 4 is driven forward and backward by the actuator 5 to open and close the valve seat 3 by the diaphragm 4.

As the drive source of the actuator 3, any drive source such as electricity, hydraulic pressure, and air pressure can be used. Here, air pressure is used as the drive source. That is, the actuator 5 of this embodiment is composed of a single-acting air cylinder, covers the diaphragm 4, and faces the valve chamber 18 on the downstream end side of the inflow hole 1 of the valve body 8, and the valve lid 11.
A cylinder chamber 12 formed in 11, a piston 13 slidably fitted in the cylinder chamber 12, a pressure receiving chamber 14 defined by the piston 13 in the cylinder chamber 12, and the valve lid 11
A supply port 15 formed in the pressure chamber 14 for connecting the pressure receiving chamber 14 to a compressed air source; a spring case 16 assembled to the valve lid 8 side of the valve lid 11; It is provided with a spring 17 for biasing to the 14 side.

The piston 13 penetrates through the valve lid 11 and the valve chamber
An indicator 21 is connected to the central portion of the diaphragm 4 via a piston rod 19 protruding into 18, and the piston rod 19 is connected to an end wall 20 of the spring case 16 so as to be retractable outside thereof. . Reference numeral 22 is an air hole in the spring case 16, and reference numeral 23 is also an air hole. When compressed air having a predetermined pressure is supplied from the compressed air source to the pressure receiving chamber 14 of the sanitary valve, the spring 17 is compressed and the piston 13, the piston rod 19, and the diaphragm 4 are driven in the valve opening direction,
As a result, the diaphragm 4 is separated from the valve seat 3 to open the sanitary valve, and the liquid flows from the inflow hole 1 through the valve seat 3 to the communication hole 24 that connects the inflow hole 1 and the outflow hole 2, and the outflow hole 2
More outflow.

When the supply of compressed air to the pressure receiving chamber 14 is stopped and the compressed air in the pressure receiving chamber 14 is opened to the atmosphere, the spring 17 extends and the piston 13, piston rod 19 and diaphragm 4 are driven in the valve closing direction. As a result, the diaphragm 4 comes into close contact with the valve chamber 3 and the sanitary valve is closed. Here, in this sanitary valve, in order to eliminate the liquid pool, the valve seat 3 is formed to be inclined with respect to the inflow hole 1, the inflow hole 1 is penetrated to the valve seat 3, and the valve seat from the bottom of the inflow hole 1 No. 3 was located below so that no liquid pool was formed.

Further, in the present invention, since there is no protrusion on the side of the inflow hole 1 of the diaphragm 4 and it is flat, the diaphragm 4 does not cause a liquid pool. Further, in the present invention, since the valve seat 3 is inclined with respect to the inflow hole 1 and the diaphragm 4 and the actuator 5 are attached thereto, even if the inflow hole 1 and the outflow hole 2 are arranged in parallel, It does not take up too much space for the sanitary valve.

Furthermore, according to the present invention, since the actuator 5 and the diaphragm 4 can be conventional products, no die cost is required, and only the piping member 8 needs to be changed, and the cost can be provided at a low cost.

[0015]

As described above, according to the present invention, the valve seat is formed between the inflow hole and the outflow hole, the valve seat is provided so as to be covered by the diaphragm, and the diaphragm is driven forward and backward by the actuator to drive the valve by the diaphragm. In a sanitary valve that opens and closes a seat, the inflow hole is arranged horizontally, the valve seat is formed so as to be inclined with respect to the horizontal, and the inflow hole is penetrated to the valve seat, and the sanitary valve is provided with a flat diaphragm. Since it is a valve, by eliminating the liquid pool in the inflow hole of the sanitary valve and preventing the contamination caused by the liquid pool,
Product quality can be improved.

Further, according to the present invention, the loss of the liquid itself can be prevented by eliminating the liquid pool.
Furthermore, the present invention has the effect of reducing the piping space and reducing the size of the entire device.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a specific example of a sanitary valve according to the present invention.

FIG. 2 is a vertical cross-sectional view of a conventional sanitary valve.

FIG. 3 is a vertical cross-sectional view of another conventional sanitary valve.

[Explanation of symbols]

 1 ... Inflow hole 2 ... Outflow hole 3 ... Valve seat 4 ... Diaphragm 5 ... Actuator 8 ... Valve body 11 ... Valve lid 12 ... Cylinder chamber 13 ... Piston 14 ... Pressure receiving chamber 15 ... Pilot supply port 16 ... Spring case 17 ... Spring 18 ... Valve chamber 19 ... Piston rod 20 ... End wall 21 ... Indicator 22 ... Air hole 23 ... Air hole 24 ... Communication hole

Claims (1)

[Claims] 1. A sanitary valve in which a valve seat having a valve seat formed between an inflow hole and an outflow hole is provided so as to cover the valve seat with a diaphragm, and the diaphragm is driven forward and backward by an actuator to open and close the valve seat with the diaphragm. In the above, the sanitary valve is characterized in that the inflow hole is arranged horizontally, the valve seat is formed to be inclined with respect to the horizontal, the inflow hole is penetrated to the valve seat, and a flat diaphragm is provided.