JPH05231556A - Four-way valve - Google Patents

Abstract

PURPOSE:To provide a four-way valve that can be easily manufactured and assembled by blocking both ends of a through-hole formed on a valve box by using blocking plugs, and by forming two valve chambers that are partitioned by an annular partition wall integrated with the valve box inside of the valve box. CONSTITUTION:An annular partition wall 4 having a center communicating hole 3 on the intermediate part of a through-hole 2 penetrating a valve box 1 laterally is provided on the valve box 1 in an integrated manner, and valve seats 4a, 4b are formed on both sides of the wall 4. Both sides of the through-hole 2 are blocked airtight by blocking plugs 5, 6 through closing rings 7, 8, while annular valve seat forming bodies 9, 10 are arranged on the end surfaces of the blocking plugs 5, 6 that are opposed to each another, and valve chambers 11, 12 are formed between the inner surfaces of the valve seat forming bodies 9, 10 and both the side surfaces of the wall 4 that are opposed to the inner surfaces. The valve seat formed on the part opposed to a valve seat 4a of the wall 4 of one valve body 14 is formed into a gradually tilted conical surface, and a screw rod 21 extending in the axial direction is provided on one side of the conical surface, while a screw hole 22 in which the screw rod 21 is to be screwed is formed on one side of the other valve body 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a four-way valve, and more particularly to a four-way valve for a differential pressure gauge whose opening state can be changed accurately by a simple operation and which can be easily manufactured and assembled.

[0002]

2. Description of the Related Art In a storage and supply container of a low-temperature liquefied gas that easily vaporizes such as liquid oxygen and liquid nitrogen, the internal liquid is measured by measuring the pressure difference between the upper gas phase and the lower liquid phase. The amount is being detected. In this case, in order to properly connect the liquid phase portion, the gas phase portion, the + side portion of the differential pressure gauge, and the − side portion of the differential pressure gauge, the four parties are connected via a four-way valve, and the four-way valve is operated. By doing so, the differential pressure is measured. The four-way valve for differential pressure gauge disclosed in Japanese Utility Model Publication No. 47-5437 developed by the present inventor is also used for this purpose.

[0003]

However, in the above-mentioned prior art, since the two valve bodies are incorporated and one of them is driven to move them, the driving force of the other valve in the returning direction is Since there is no choice but to rely on a spring, there is the disadvantage that the valve actuation is inaccurate, and the spindle is moved by the thread of the valve casing, the two valves are moved at equal intervals via the push rod, or Since one of the valves is moved by the spindle and the other is returned by the spring, the relative positions of the valve seats must be accurate, which is a drawback of difficult manufacture and assembly.

Further, in the above-mentioned one, since the two valve bodies move intricately in the two valve chambers, it is difficult to operate accurately, and the drain,
There was also a drawback in that safety could not be guaranteed, because malfunctions and malfunctions frequently occurred due to biting of sliding parts such as rust and freezing of water due to low temperature.

The present invention solves the above-mentioned drawbacks of the conventional four-way valve for a differential pressure gauge, is easy to manufacture and assemble, operates accurately, is safe and reliable, and has a reliable difference. The purpose is to provide a four-way valve for a pressure gauge.

[0006]

A four-way valve according to the present invention includes a valve casing, a through hole formed in the valve casing, an embolus for hermetically closing both ends of the through hole, and a central portion of the through hole. A ring-shaped partition wall integrally formed with the valve housing and having valve seats on both side surfaces, two valve chambers partitioned by the partition walls, and a portion of each valve chamber facing the valve seat of the partition wall. A valve seat formed in the valve seat, two conduit holes that open in each valve chamber on both sides of the valve seat, a valve element inserted in each valve chamber, and one of the valve elements for rotating the valve element. A spindle extending from the valve body to the outside of the valve casing in an airtight manner through one of the embolic plugs, a rotary handle provided on the spindle, a screw rod protruding from either one of the two valve discs, and a screw rod. And a screw hole formed in the other one of the valve bodies so as to be screwed into A prism formed on either one of the embolic opposed thereto, characterized in that the prismatic made more a square hole formed in the other one to be inserted.

[0007]

Since the four-way valve of the present invention has the above-described structure, the other valve body is rotatably or slidably supported with respect to the casing by the action of the prismatic portion and the rectangular blind hole. One valve element is supported so that it can slide and rotate,
Since the sliding range of the two is defined by the valve seat, the two valve bodies screwed together by rotating the rotary handle move toward or away from each other, and the valves on both side edges of the respective valve chambers are closed. It selectively occludes or opens the seat to act exactly as a four-way valve.

[0008]

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

In the present invention, as shown in FIG.
A through hole 2 penetrating in the lateral direction is formed, and a ring-shaped partition wall 4 having a center communication hole 3 is integrally provided with the valve housing 1 in the middle of the hole 2. 4b is formed.

Further, as shown in FIGS. 2 and 3, both sides of the through hole 2 are airtightly closed by sealing plugs 7 and 8 by plugs 5 and 6 screwed into the through holes 2, and the plugs 5 and 6 are mutually closed. Ring-shaped valve seat forming bodies 9 and 10 are arranged on the opposite end surfaces, and as a result, the valve chambers 11 and 12 are respectively provided between the inner surfaces of the valve seat forming bodies 9 and 10 and the opposite side surfaces of the partition wall 4 facing the inner surfaces. Are formed in the valve chambers 11 and 12, respectively.
3 and 14 are arranged, and valve seats having conical surfaces are formed on both sides of the valve bodies 13 and 14, respectively.

Further, ring-shaped valve seats 15 and 16 made of a non-metal material such as Teflon are provided on the inner end surfaces of the valve seat forming bodies 9 and 10 so as to be in contact with the respective valve seats of the valve bodies 13 and 14. In addition, the valve chamber 1 is provided on both sides of the valve seats 15 and 16.
Two conduit holes 17, 18 and 19, 20 opening respectively in 1, 12 are formed through the valve housing 1 and the valve seat forming bodies 9, 10.

The valve seat 4 of the partition wall 4 of the one valve body 14
The valve seat formed on one side facing b is a gently inclined conical surface, and a screw rod 21 extending in the axial direction is projected on the one side, and the other valve body facing the one valve body 14 is formed. 1
3 is formed with a screw hole 22 into which the screw rod 21 is screwed.

Further, on the other side of the one valve body 14, a spindle 24 which is hermetically protruded outside the valve casing 1 via a sealing ring 23 is fixed, and a rotary handle 25 is fixed to an end portion of the spindle 24. At the same time, the plate body 26 is projectingly provided on the other side of the other valve body 13, and the rectangular hole 2 into which the plate body 26 is fitted.
7 is provided on the end surface of the embolus 5.

Since the four-way valve of the present invention is constructed as described above, the rotary handle 25 is rotated in one direction from the state shown in FIG. 3 so that the valve bodies 13 and 14 are separated from each other by the action of the screw rod 21. When pushed, one valve body 14 moves to the right in FIG. 3 and the other valve body 13 moves to the left in FIG. 3, and the valve seat forming body 9 corresponding to the valve seats on the other side of both valve bodies 13 and 14 is moved. , 10
Abut on the valve seats of the conduit holes 17 and 1 as shown in FIGS.
9, the conduit holes 18 and 20 are closed.

When the rotary handle 25 is rotated in the opposite direction from this state, the valve discs 13 and 14 are actuated by the screw rod 21 so that the valve seats on the minus side of the valve discs 13 and 14 correspond to each other.
The valve seats 1 and 12 are brought into contact with the valve seats 4a and 4b so that the conduit holes 17 and 18 communicate with each other and 19 and 20 communicate with each other as shown in FIGS.

By the rotation of the rotary handle 25,
If the valve bodies 13 and 14 are in the intermediate position between FIG. 4 and FIG. 5, all the conduit holes 17 to 20 are in communication with each other as shown in FIGS. 3 and 8.

[0017]

As described above, in the four-way valve of the present invention, the through hole 2 is formed in the valve casing 1, and both ends thereof are provided with the two plugs 5, 5.
6 is used to form two valve chambers 11 and 12 which are separated by a ring-shaped partition wall 4 which is integrated with the valve casing, so that the valve casing 1 is divided into two and a ring body is provided between them. It does not require a complicated structure such as inserting the valve chamber to separate the valve chamber. Further, since the surface of one of the valve bodies 14 which is advanced and retracted while being rotated by the rotary handle 25 is in contact with the valve seat 4b of the partition wall 4 is a conical surface with a gentle inclination, the valve seat formed on the partition wall is made of metal. Even so, there is a great advantage that the deterioration of the valve function due to wear can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view of a valve casing of a four-way valve according to the present invention.

FIG. 2 is a cross-sectional view of the four-way valve of the present invention excluding a non-rotating valve body portion.

FIG. 3 is a sectional view of the four-way valve of the present invention.

FIG. 4 is a cross-sectional view of the four-way valve of the present invention when the valve bodies are at the outer ends of each other.

FIG. 5 is a cross-sectional view of the four-way valve of the present invention when the valve bodies are at inner ends of each other.

FIG. 6 is an explanatory diagram of an open / closed state of a conduit hole of the four-way valve of the present invention.

FIG. 7 is an explanatory diagram of an open / closed state of a conduit hole of the four-way valve of the present invention.

FIG. 8 is an explanatory diagram of an open / closed state of a conduit hole of the four-way valve of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 valve casing 2 through hole 3 center communication hole 4 partition wall 4a valve seat 4b valve seat 5 embolism 6 embolism 7 sealing ring 8 sealing ring 9 valve seat forming body 10 valve seat forming body 11 valve chamber 12 valve chamber 13 valve body 14 valve body 15 valve seat 16 valve seat 17 conduit hole 18 conduit hole 19 conduit hole 20 conduit hole 21 screw rod 22 screw hole 23 sealing ring 24 spindle 25 rotation handle 26 plate 27 rectangular hole

Claims (2)

[Claims] 1. A valve casing, a through hole formed in the valve casing,
An embolus that hermetically seals both ends of the through hole, a ring-shaped partition wall integrally formed with the valve casing at the center of the through hole and having valve seats on both side surfaces, and separated by the partition wall Two valve chambers, a valve seat formed in a portion of each of the valve chambers that faces the valve seat of the partition wall, two conduit holes that open in each of the valve chambers on both sides of the valve seat, and each of the valve chambers. And a spindle that extends in an airtight manner from one of the valve bodies via one of the embolic plugs to rotate one of the valve bodies, and a rotary handle provided on the spindle.
A threaded rod formed so as to project into one of the two valve bodies, a threaded hole formed in the other of the valve bodies so as to be screwed into the threaded rod, and the other of the valve bodies and the opposite side thereof. A four-way valve, comprising: a prism formed on either one of the emboli described above and a square hole formed on the other side into which the prism is inserted. 2. The surface of the rotary valve body facing the valve seat of the partition wall is a gentle conical surface, and the valve seat formed in each of the valve chambers is made of a non-metallic material. A four-way valve according to claim 1.