JPH054551B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a liquid storage and transfer mechanism or a liquid sealing mechanism for liquid transfer piping, and a valve body and a valve box used for these purposes. Especially regarding four-way valves.

(Prior art) In the production process of the chemical industry, fluid transfer, storage (fluid cutoff), flow rate adjustment, etc. are generally indispensable operations, and furthermore, when the production process is carried out in batch mode, Cleaning tanks or pipes,
Liquid sealing to protect the physical properties of piping surfaces has become an essential operation to maintain smooth production, and various valves or valves are used for these operations.

For example, tank ball valves and bottom valves installed at the bottom of tanks are known as devices for discharging liquid from inside a tank, and a combination of ball valves and bottom valves is used for cleaning piping lines and liquid sealing. .

In addition, as a tank ball valve, Utility Model No. 48-30981,
There are disclosures in No. 48-30982, No. 48-54522, No. 48-114334, and JP-A-47-7800, and the bottom valve is described in the Chemical Equipment Handbook (Maruzen; edited by the Chemical Industry Association, p. 1281). be.

In addition, when cleaning piping systems using ball valves and bottom valves, there are two types: one in which the cleaning liquid flows into the discharge system from above, and the other in which backwashing (backwashing) is carried out from below. The drawback is poor cleaning of contaminants due to the use of ball valves.
Note that the inside of the valve counterflow path of the bottom valve cannot be cleaned as long as there is liquid material in the tank.

These valves that have been put to practical use have considerable drawbacks in practical use, particularly in fine chemical production processes. In other words, the disadvantage of ball valves is that the sliding surfaces of the valve seat (valve box) and the spherical valve body are sealed by line contact or surface contact using a sealing material, and as a result, the seal between the valve seat and the annular valve body is A gap (dead space) occurs between the two. A disadvantage of this ball valve is that the transferred liquid in the flow path of the valve body enters this dead stream when opening and closing operations are performed. The liquid that has entered the dead space becomes a contaminant and cannot be easily cleaned, and a small amount flows out each time the opening/closing operation is performed and mixes with new or different types of liquid in the flow path.

Furthermore, there is a risk that air bubbles trapped in the dead space of the valve body may be brought into the system during the opening/closing operation.

Furthermore, there is a risk of leakage due to wear of the seal, the ball seal must be frequently inspected, and errors are likely to occur in channel alignment due to rotation angle.

(Objective of the Invention) In view of the defects of the piping system using the conventional valves, the object of the present invention is to (1) almost eliminate the mixing of contaminants into the transferred liquid; (3) There are no bubble traps in the piping flow path, which is convenient for flotation and defoaming, and has good bubble removal properties. (4) The valve body seal is reliable and there is no operational error. (5) To provide a valve mechanism that provides a simple and compact piping system.

(Structure of the Invention) Three valve boxes each having a chamber through which at least one outlet conduit communicates laterally and outwardly are connected and reciprocatingly slides through the three valve boxes and their chambers. In the sliding hollow pipe of a conduit system in which both ends of the sliding hollow pipe are connected to supply pipes, (a) the supply pipes at both ends are connected at the central valve box position of the three connected valve boxes; (b) communication ports are bored on both sides of the blocked position to allow communication between the supply pipe and the outlet pipe; and (c) each chamber is closed. Each chamber is equipped with a fixed valve body whose inner wall serves as a valve seat, and the three valve bodies are connected to each other by either one of the valves on either side of the valve body by sliding the sliding hollow pipe back and forth. Two sets of pipes, a set of a supply pipe on the box side and a lead-out pipe of the central valve box chamber, and a set of a supply pipe on the other valve box side and a lead-out pipe of the valve box chamber are made to communicate at the same time. The above-mentioned object of the present invention is achieved by a multi-way valve which is characterized in that it switches pipe lines.

In addition, among the three valve boxes connected as an embodiment of the present invention, each of the chambers of the valve boxes on both sides (hereinafter referred to as sleeve valve boxes) except for the central valve case (hereinafter referred to as the central valve case) has a side outer side. By providing two outlet pipes leading to the valve, it is possible to obtain a practically useful application in addition to a simple switching valve function.

Next, embodiments of the present invention will be described using figures.

FIG. 1 is a sectional view of a multi-way valve (four-way valve) as an example of an embodiment of the present invention.

A, B, and C are three connected valve boxes,
A is the central valve box, B and C are the side valve boxes on both sides. 3
The valve boxes each have chambers A1, B1, and C1.
Further, each chamber has a respective outlet conduit A2 and B2, C2 connected to the outside of the respective valve body.

1 is valve box A, B, C and their chamber A
1, B1, and C1 and slides back and forth, the tips of which protrude outward from the sleeve valve box are connected to supply pipes, respectively.

The sliding hollow pipe 1 has a blocking plug 11 at the position of the central valve box A, and a supply pipe L _b on the side valve boxes B and C side.
and L _c are cut off from each other. 1b
and _1c are sliding hollow pipe parts on the side of the sleeve valve box B and C, respectively.

Further, reference numerals 12 _b and 12 _c are communication ports bored in sliding hollow pipes 1 b and 1 _c on both sides of the plug 11 .
Sliding hollow pipe 1 _b is connected to chambers A1 and B1,
_1c is provided in the chambers A1 and C1 at a position where it can be opened within the reciprocating width of the sliding hollow pipe 1.

13 _a , 13 _b , and 13 _c are valve bodies fixedly connected to the sliding hollow pipe 1 in chambers A1, B1, and C1, and at the reciprocating end point of the pipe 1, the reciprocating direction of each chamber is the same. Aligns and abuts against the valve seat on the side. It is useful to use a valve body and/or an elastic body to ensure a complete seal between the valve body and the valve seat.

2 is a cylinder that slides back and forth on the sliding hollow pipe 1; 21 is a piston fixed to the sliding hollow pipe 1; The illustrated cylinder uses compressed air, and 22 and 23 are air ports through which compressed air is injected or discharged.

The mechanism for reciprocating the sliding hollow pipe may be of any type as long as it can smoothly operate the reciprocating width of the sliding movement and ensure that each valve element repeatedly comes into close contact with the valve seat, and the driving force is It may be driven manually, mechanically or electrically. For example, in addition to the compressed air piston method, a hydraulic piston method, a combination method of compressed air or oil pressure and a biasing member such as a spring as a restoring force, an electric or manual crank method, a pinion-rack method, a solid cam-reciprocating rod method, etc. Can be adopted arbitrarily.

In the illustrated state, a set of sliding hollow pipe 1 _c and outlet pipe A2, a pair of sliding hollow pipe 1 _b and outlet pipe B
Two sets of channels flow, one sliding hollow pipe and the other.
If you slide it to the left in the diagram and place it at the end point, 1 _c - C2
and 1 _b and A2 are in circulation and completely perform the function of a four-way valve.

Further, FIG. 2 shows another embodiment of the present invention.

This is an example in which in addition to the outlet pipes B2 and C2 which lead outward from the chambers B1 and C1 of the sleeve valve boxes B and C, B3 and C3 are added, respectively. In FIG. 2, the same symbols as those in FIG. 1 have the same meanings.

In the state shown in Fig. 2, 1 _c -A2 is flowing on the supply pipe L _c side, and at the same time, 1 _b -B2, B3 - B2, C3 - C2 are flowing on the supply pipe L _b side. A set of conduits are in circulation.

Therefore, when the liquid to be treated is supplied to or discharged from a tank by the supply pipe L _c of 1 _c - A2, for example, the supply pipe L _b is connected to the L _b pipe and the chamber independently from the supply pipe L _c . It is possible to pass liquid B1 and C1,
If cleaning water is used for the liquid passage, the _Lb pipe, chambers B1 and C1, and the outer wall of the sliding hollow pipe 1 exposed to both chambers can be cleaned.

In Fig. 2, if the sliding hollow pipe 1 is slid to the left opposite to that shown in the figure and the supply pipe L _b is switched to supply or discharge the liquid to be treated into the tank, the same result as described above is obtained. Operation is possible.

Therefore, waste products and impurities of the liquid to be treated are not mixed into the supply pipe line with the pipe structure according to the present invention, and air bubbles do not remain in the pipe line due to switching.

Furthermore, an outlet pipe A3 (not shown) is provided in the chamber A1, and the flow ports 12 _b and 12 _c are connected to the chamber B.
1 and A1 and chambers C1 and A3-, which are blinded at the partition part of A1 and independent from the supply pipes L _b and L _c .
It is also possible to create an A2 conduit system.

(Effects of the Invention) A four-way valve that satisfies the above-mentioned objects of the present invention, is easy to operate, is free from operational errors, and is convenient for automation.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views of examples of embodiments of the present invention. A, B and C...valve box, A1, B1 and C1...
...Chamber, A2, B2 and C2... Outlet pipe line, B3 and C3... Outlet pipe line, 1... Sliding hollow pipe, 11... Blocking plug, 12 _b and 12 _c ... Distribution port, 13 _a , 13 _b and 13 _c ... Valve body, 2...
Cylinder, 21...Piston.

Claims (1)

[Scope of Claims] 1. Three valve boxes each having a chamber through which at least one outlet pipe communicates with the outside are connected, and the three valve boxes are connected.
In the sliding hollow pipe of the pipeline system in which both ends of the sliding hollow pipe that reciprocates through the valve box and its chamber are connected to the supply pipeline, (a) three connected valves; At the central valve box position of the box, the flow from the supply pipes at both ends is blocked, and (b) there are flow channels on both sides of the closed position that allow the flow between the supply pipe and the outlet pipe. (c) Each chamber is provided with a fixed valve body whose valve seat is the inner wall of each chamber, and the sliding hollow pipe is slid back and forth. A set of three valve boxes connected together, a supply pipe on either side of the valve box and a lead-out pipe from the central valve box chamber, and a supply pipe on the other valve box side and a lead-out pipe from the valve box chamber. A multi-way valve characterized in that it connects two sets of pipe lines simultaneously and switches the pipe lines. 2. Claim 1, characterized in that each of the chambers of the valve boxes on both sides, excluding the central valve case of the three connected valve boxes, is provided with two lead-out conduits leading to the outside. Multi-way valve as described in section.