JPH0562773U - Branch valve - Google Patents

Abstract

(57) [Summary] [Purpose] Regarding a branch valve that branches and flows liquid from the main piping flow path, the main flow path without liquid accumulation is formed and maintained inside the branch valve, and the liquid branches and flows out to the branch pipe side at any time. In addition, it is possible to prevent the generation of dust in the main channel and the invasion of dust from the movable component into the main channel. [Structure] An annular space (2a) formed by projecting a cylindrical branch valve seat (3) into a cylindrical space (2) with one end opened to the outside in the valve box (1), In addition, the valve box (1) has two main ports (4), (5) communicating with each other through the annular space (2a).
And a branch port (6) communicating with the annular space (2a) through the inner diameter hole (3a) of the branch valve seat (3),
The opening of the cylindrical space (2) of (1) is closed, and the valve stem (9) mounted on the valve box lid (8) on the outside of the opening closes the central lower surface of the branch valve seat (3). The valve is a branch valve having a diaphragm valve (7) for closing and opening the branch valve seat (3) of the valve box (1) by bringing it into contact with the open end surface of the branch valve.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a branch valve for branching and outflowing a liquid from a main pipe flow path, and in particular, supplies ultrapure water, sterile water and a culture liquid used in the fields of electronic industry, pharmaceutical manufacturing, food manufacturing, etc. The present invention relates to a branch valve suitable for use in a piping system for

[0002]

[Prior Art]

 For branching out the liquid from the main pipe flow path, as shown in [Fig. 3], the branch pipe (13) in which the on-off valve (12) is inserted in the main pipe (11) by assembling or welding the T pipe ) Is connected to the main pipe (21) and the branch pipe (23) is connected to the main pipe (21) as shown in [Fig. 4]. A method of incorporating a multi-way valve (22) such as the T-shaped ball valve described above and branching out the liquid through the multi-way valve (22) and the branch pipe (23) is generally adopted.

[0003]

[Problems to be solved by the device]

 On the other hand, in piping systems that supply ultrapure water, sterile water, culture liquid, etc. used in the fields of electronics industry, pharmaceutical manufacturing, food manufacturing, etc., in order to maintain high quality of those liquids, the flow path is It goes without saying that the cleanliness and stability of the inner surface of the pipe to be formed are improved, and dust from the piping components is prevented from entering the flow path, while the cleanability of the flow path is improved. It is necessary to avoid the formation of a liquid pool that causes deterioration of the water content and bacterial growth. In addition, in order to prevent bacterial growth, it is necessary to avoid the retention of liquids in the flow channels.Usually, in the distribution system that supplies these liquids, it is necessary to stop the liquids in the main flow channel. A method is used in which the liquid in the main piping flow path is branched and flowed out at a suitable time to be supplied to the use side after being made to flow.

However, in the case of branching out the liquid by the conventional method shown in FIG. 3, between the main pipe (11) and the on-off valve (12), the inside of the main pipe (11) is opened to the on-off valve (12) side. It is unavoidable that a space D protruding to the inside is formed, and this protruding space D becomes a liquid pool that causes bacterial growth and deterioration of cleaning performance.

Further, when the liquid is branched out by the conventional method shown in FIG. 4, it is possible to prevent the protrusion portion from being formed in the inner diameter of the main pipe (21), but these multi-way valves (22) have a branch flow passage. Since it has a built-in valve body (22a) and changes the direction of the liquid by rotating or sliding the valve body (22a), as shown in [Fig. 4], the valve body (22a) A part of the branch flow passage space D becomes a liquid pool, and as a result, the main distribution flow channel in which these multi-way valves are incorporated has a liquid pool that causes bacterial growth and deterioration of cleaning performance. Furthermore, since a member that rotates or slides is incorporated in the main pipe flow path, dust and fine particles from those sliding surfaces directly enter the flow path, and dust and fine particles are generated. Increases the risk of damaging the liquid quality in the main piping flow path.

The present invention has been made in order to solve the above-mentioned problems of the prior art, in which a main flow path having no liquid pool is formed and maintained in the inner portion thereof, and the liquid is occasionally supplied to the branch pipe side. It can be diverted, and it does not form a liquid pool in the built-in main pipe flow path, and can block and open the liquid to the branch pipe without rotating or sliding. An object of the present invention is to provide a branch valve that can be formed and that can prevent dust from being generated from the opening / closing portion.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has the following configuration. That is, the branch valve according to the present invention forms a cylindrical space in which one end portion is opened to the outside, and a cylindrical branch valve from the closed inner end surface of the cylindrical space. The valve box is formed by concentrically projecting the seat to form an annular space around the branch valve seat inside the valve box, and the valve box is provided on opposite sides on a line orthogonal to the axis of the branch valve seat of the valve box. , The two main ports that communicate with each other through the annular space in the valve box and the part located on the base side of the branch valve seat of the valve box, and the circle inside the valve box through the inner diameter hole of the branch valve seat. The branch port that communicates with the columnar and annular spaces and the inner surface of the central portion, which has a flat disk shape, are placed at the opening of the columnar space of the valve box with the open end of the branch valve seat facing the open end. A diaphragm valve that closes the opening of the cylindrical space, and is located outside this diaphragm valve. A valve box lid mounted on the opening of the cylindrical space of the valve box and operably mounted on this valve box lid, and the operation causes the central part of the diaphragm valve to open at the open end of the branch valve seat in the valve box. And a valve rod that moves back and forth toward.

[0008]

【Example】

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

FIG. 1 is a view showing a branch valve of an embodiment of the present invention, wherein (a) is a front sectional view and (b) is an AA sectional view of (a). ..

In FIG. 1, (1) is a valve box, and this valve box (1) is made of non-magnetic stainless steel (JIS; SUS316L) and has a cubic shape inside. A cylindrical space (2) is formed on one surface of the main body, and the cylindrical branch valve seat (3) is made concentric with the closed inner end surface of this cylindrical space (2). An annular space (2a) is formed around the branch valve seat (3) that is projected and forms a main flow path. In addition, the central axes of the cylindrical space (2) and the branch valve seat (3) pass through the center of the main body of the valve box (1), and on the one surface of the main body where the cylindrical space (2) is opened. It is orthogonal.

In addition, two main ports (4), (5) with flanges of the same shape are formed on both sides of the branch valve seat (3) of the main body of the valve box (1) that face each other with the axis line interposed therebetween. ) Are projected in opposite directions. The inner diameter holes (4a), (5a) of these two main ports (4), (5) communicate with the annular space (2a) in the valve box (1), respectively, and the annular space (2a ) Communicate with each other.

On the surface of the main body of the valve box (1) located on the base side of the branch valve seat (3), a branch port (6) with a flange is provided with two main ports (4), It is projected in a direction orthogonal to the axis of (5). Also, the inner diameter hole (6a) of this branch port (6) is made to pass through the inner diameter hole (3a) of the branch valve seat (3) with the same diameter, and the inner diameter hole (3a) of this branch valve seat (3) It is communicated with the cylindrical space (2) and the annular space (2a) in the valve box (1) via the.

Here, the annular space (2a) forming the main flow path of the valve box (1) has a flow path capacity of two main ports (4), (5) inner diameter holes (4a), (5a). It has a cross-sectional area that is slightly larger than the flow path volume of each, and is designed to prevent the liquid flowing inside these from being throttled in this annular space (2a) and becoming negative pressure. The end face of the opening of (3) is formed into a smooth flat surface, and its inner diameter hole (3a) is smaller than the inner diameter holes (4a) and (5a) of the two main ports (4) and (5). Has been formed. Further, the valve box (1) is also passivated by electrolytically polishing all the inner surfaces and the sealing surfaces of the flanges and then heating them at a high temperature.

(7) is a diaphragm valve. This diaphragm valve (7) is made of a composite Teflon material (FPM + PTFE) that is stable against ultrapure water and has no eluent, and has a flat disk shape. The formed main body is provided with a connecting projection at the center of the outer surface, the inner surface of which is opposed to the opening end of the branch valve seat (3) and the opening of the cylindrical space (2) of the valve box (1). It is arranged in (2a) and closes the opening (2a) of the cylindrical space (2) of this valve box (1).

(8) is a valve box lid, and this valve box lid (8) is made of the same kind of stainless steel as the valve box (1) and is located outside the diaphragm valve (7). It is arranged on the opening (2a) of (1) and is detachably attached to the valve box (1) by a fastening bolt (8a). The inner end of the valve box lid (8) is fitted into the opening (2a) of the cylindrical space (2) of the valve box (1), and the outer peripheral edge of the diaphragm valve (7) is attached to the valve box. It is sandwiched between (1) and the diaphragm valve (7) to securely close and seal the opening (2a) of the cylindrical space (2) of the valve box (1).

(9) is a valve stem, which is screwed into the center of the upper part of the valve box lid (8) and is operated by a cock (10) connected to its outer end. It is supposed to be done. Further, the valve rod (9) has an inner end that can be moved back and forth in the direction of the valve box (1) in the valve box lid (8), and its lower surface is engaged with the connecting projection of the diaphragm valve (7). A valve push (9a) having a fitting recess is provided. The valve push (9a) of the valve rod (9) is connected to the diaphragm valve (7), and the engagement of the valve pushes the lower surface of the central part of the diaphragm valve (7) to the valve box (1). The diameter of the branch valve seat (3) is regulated to be a smooth circular surface with a diameter larger than the outer diameter of the valve seat (3). Move it back and forth toward the open end of 3).

Next, the operation of the branch valve of the present embodiment having the above configuration will be described with reference to FIG. 2 which is an explanatory diagram of its usage.

First, as shown in [FIG. 2], the branch valve of the present embodiment is provided with main pipes Mp, Mp which form a main pipe flow path for supplying ultrapure water, sterile water, a culture solution and the like. Between the two main ports (4) and (5) on both sides thereof, and the branch port (6) is connected to the branch supply pipe Sp that communicates with the side using these liquids.

When the liquid L is supplied into the main pipe flow path and the liquid L is branched out to the side of the branch supply pipe Sp, as shown in FIG. When the rod (9) is operated, the branch valve is opened with a space between the lower surface of the central part of the diaphragm valve (7) and the open end surface of the branch valve seat (3) in the valve box (1). At this time, a part of the liquid L enters the branch valve seat (3) from the annular space (2a) around the branch valve seat (3) in the valve box (1). While flowing in and being branched and discharged to the side of the branch supply pipe Sp through the branch port (6), the flow in the main pipe flow path is continued through this annular space (2a) and within the branch valve. It does not stay.

Further, when stopping the branch outflow of the liquid L to the side of the branch supply pipe Sp, the valve rod (9) is turned inward by the cock (10) as shown in FIG. Then, the lower surface of the central portion of the diaphragm valve (7) is brought into contact with the opening end surface of the branch valve seat (3) in the valve box (1) to put the branch valve in the closed operating state. , The liquid L is blocked from flowing into the branch valve seat (3) in the valve box (1), and flows in the main pipe flow path through the annular space (2a) around the branch valve seat (3). And does not stay in the branch valve.

Here, the branch valve seat (3) is closed by the contact between the opening end surface of the branch valve seat (3) and the lower surface of the diaphragm valve (7), that is, it causes dust generation. Since they do not rotate or slide with respect to each other, there is no concern that dust will be generated from the branch valve seat (3) and diaphragm valve (7) located in the main flow path when closing or opening them. On the other hand, the valve rod (9) and the valve push (9a), which rotate and slide during the operation to move the diaphragm valve (7) forward and backward, and which may cause dust generation, can be performed by the diaphragm valve (7). Since it is isolated from the inside of the box (1), dust from these movable members is reliably prevented from entering the main flow path inside the valve box (1).

In this way, in the branch valve of the present embodiment in which the liquid is branched and outflowed from the main pipe flow passage, the main flow passage having no liquid pool that causes deterioration of liquid quality and detergency is formed inside the branch valve. The liquid can be branched and flowed out to the branch pipe side at any time while being formed and maintained. Moreover, dust is not generated in the main flow passage and dust is generated from the movable member and fine particles are invaded into the main flow passage. Since this can be reliably prevented, the quality of the liquid in the built-in main pipe flow path can be maintained high.

In the branch valve of the present embodiment, the valve box is made of stainless steel (JIS; SUS316L) and the entire inner surface is passivated, but this is an example. As long as it is stable with respect to the liquid and does not elute, it may be made of another constituent material such as a glass lining material or a synthetic resin. Further, as for the diaphragm valve, a flexible material that is similarly stable to the target liquid may be made of another material such as viton.

[0024]

[Effect of the device]

 As described above, according to the branch valve of the present invention, it is possible to form and maintain a main flow path without a liquid pool inside thereof and still allow the liquid to branch out to the branch pipe side at any time. No liquid pool is formed in the built-in main pipe flow path, and it is possible to reliably prevent dust generation in the main flow path, dust generation from movable members, and intrusion of fine particles into the main flow path. Therefore, the quality of the liquid in the main piping channel can be maintained high.

[Brief description of drawings]

FIG. 1 is a view showing a branch valve according to an embodiment of the present invention,
(a) is a front sectional view, (b) is a sectional view taken along the line AA of (a).

FIG. 2 is an explanatory view of a usage mode of the branch valve according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram of a conventional branching method.

FIG. 4 is an explanatory diagram of another conventional branching method.

[Explanation of symbols]

(1) --Valve box, (2) --Cylindrical space, (2a)-Annular space, (3)
--Branch valve seat, (4) --Main port, (5) --Main port, (6)-
Branch port, (7) --diaphragm valve, (8) --valve box lid,
(9) --valve rod, (10)-cock.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Creator Ryoichi Mori 1225 Hattorigawa, Yao City 3 3

Claims (1)

[Scope of utility model registration request] 1. A cylindrical space having one end opened to the outside is formed inside, and a cylindrical branch valve seat is concentrically formed from the closed inner end surface of the cylindrical space. A valve box formed by projecting and forming an annular space around the branch valve seat inside the valve box, and the valve boxes provided on opposite sides on a line orthogonal to the axis of the branch valve seat of the valve box, and the valve box inside each other. Two main ports communicating with each other through the annular space, and a part located on the base side of the branch valve seat of the valve box, and communicating with the cylindrical and annular spaces inside the valve box through the inner diameter hole of the branch valve seat. Is arranged in the opening of the columnar space of the valve box with the branch port and the inner surface of the central part, which is flat disk-shaped, facing the opening end of the branch valve seat. Above the diaphragm valve that closes and the opening in the cylindrical space of the valve box that is located outside this diaphragm valve. A valve box lid attached to the valve box, and a valve rod that is operably attached to the valve box lid and that moves the central part of the diaphragm valve back and forth toward the open end of the branch valve seat in the valve box. A branch valve characterized in that