JP2002156069A - Valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve capable of dispensing with a detent member, reducing the number of components, being miniaturized, simplifying the assembling, disassembling and maintenance, and preventing the abrasion and seizure of the components. SOLUTION: In this valve opened and closed by connecting a male screw shaft 26 to a valve element 25 axially movably inserted into a valve body 24, rotating a driving female screw part 28 engaged with the male screw shaft 26 by a handle 30, and axially moving the valve element 25 without rotating the valve element 25 and the male screw shaft 26, the shaft centers a, b of the valve element 25 and the male screw shaft 26 are shifted from each other, whereby a detent state of the valve element 25 and the male screw shaft 26 can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve, such as a globe valve, which opens and closes by moving a valve body in the axial direction without rotating the valve body. The present invention relates to a valve that can be reduced in size and simplified in assembly, disassembly, and maintenance as well as in number.

[0002]

2. Description of the Related Art Conventionally, a valve which is opened and closed by moving the valve body in the axial direction without rotating it, as shown in FIG. 4, has one connection port 1 disposed coaxially and a valve body insertion hole. A valve body 4 is formed by providing the other connection port 3 in a branched shape between the two, and the valve body 5 is inserted into the one connection port 1 from the insertion hole 2 so as to be movable in the axial direction. A male screw shaft 6 is connected to the end, and a support member 9 of a female screw member 8 is fixed to the tip of a plurality of stays 7 fixed to the valve body 4 so as to be parallel to the male screw shaft 6. The female screw member 8 held so as not to move in the direction is screwed with the male screw shaft 6, a handle 10 for rotating operation is fixed to the female screw member 8, and a stay protruding from the valve body 4 of the valve body 5 is provided. 7 in the rotational direction,
It has a structure in which a rotation stopping member 11 that is movable in the axial direction of the valve element 5 is fixed.

In such a conventional valve, since the valve element 5 and the male screw shaft 6 are coaxial, the valve is provided so that the female screw member 8 and the male screw shaft 6 can feed the male screw shaft 6. It is necessary to fix the rotation stop member 11 to the body 5,
When the female screw member 8 is rotated by the handle 10, the valve element 5 and the male screw shaft 6 move by the stroke S in the axial direction without rotating due to the feeding action of the female screw 12 and the male screw shaft 6 of the female screw member 8 rotating at a fixed position. Then, a valve closed state in which one connection port 1 and the other connection port 3 are shut off by the valve body 5 and a valve open state in which the one connection port 1 communicates with the other connection port 3 are obtained.

[0004]

By the way, when the rotation stopping member 11 is fixed to the valve body 5 like a conventional valve,
The total length L of the valve becomes longer by the amount of attaching the rotation stopping member 11, and the entire valve becomes larger.

Further, the number of parts is increased by the amount corresponding to the attachment of the rotation stop member 11, which complicates the work of assembling, disassembling, and maintaining, and a large moment acts on the sliding portion of the rotation stop member 11. It causes wear and seizure.

Accordingly, an object of the present invention is to eliminate a rotation stopper member as a separate part, to reduce the number of parts, to reduce the size, simplify assembly, disassembly and maintenance, and to prevent abrasion and seizure of parts. Is to provide.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an externally threaded shaft connected to a valve body inserted in a valve body so as to be movable in the axial direction. In the valve which opens and closes by rotating the driving female screw portion screwed to the male screw shaft and moving the valve member in the axial direction without rotating the valve member and the male screw shaft, the axis of the valve member and the male screw shaft is adjusted. By displacing the valve body, a configuration is adopted in which a detent state is obtained between the valve body and the male screw shaft.

Here, the valve body and the male screw shaft may be processed to be eccentric from an integral material, or the valve body and the male screw shaft may be formed from separate materials and connected in an eccentric state.

When the driving female screw portion is rotated, a rotational force acts on the male screw shaft and an eccentric rotational force acts on the valve body about the axis of the male screw shaft, but the valve body is held in the valve body. Eccentric rotation cannot be performed, and the rotation stops.

Another aspect of the present invention is to provide a valve body which is inserted into a valve body so as to be movable in an axial direction, and which has a female screw hole, and which rotates a male screw shaft screwed into the female screw hole. In the valve which is opened and closed by moving the shaft in the axial direction, the female screw hole of the valve body with which the male screw shaft is screwed is displaced from the axis of the valve body so that the valve body can be prevented from rotating. It adopts the configuration described above.

[0011]

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

As shown in the figure, a valve of a type that is opened and closed by moving the valve body in the axial direction without rotating it has one connection port 21 and a valve body insertion hole 22 that are coaxially arranged with the same inner diameter.
The other connection port 23 is provided in a branch shape between
A male screw shaft 26 having a smaller diameter than the valve body 25 is formed at one end of a valve body 25 which is formed so as to be able to slide in the axial direction from the insertion hole 22 to the one connection port 21. The support member 29 of the female screw member 28 is fixed to the tip of a plurality of stays 27 fixed to the valve body 24 so as to be parallel to the male screw shaft 26, and is held by the support member 29 so as to be rotatable and not to move in the axial direction. The female screw member 28 is screwed to the male screw shaft 26, and a handle 30 for rotating operation is fixed to the female screw member 28.

The valve body 25 and the male screw shaft 26 are connected to the valve body 25.
And the axis b of the male screw shaft 26 is shifted,
Therefore, the valve body insertion hole 22 and the female screw member 28 provided in the valve body 24 are eccentrically arranged by the amount of which both axes are shifted, and the inner periphery of the valve body insertion hole 22 in the valve body 24 is provided with the valve body 25 and the valve body 25. A packing 31 that seals the gap is incorporated, and a packing holder 32 is attached to the outside of the valve body 24.

The valve according to the first embodiment shown in FIG.
It is formed by processing the valve body 25 and the male screw shaft 26 in an eccentric state from an integral material.

The valve according to the second embodiment shown in FIG.
The valve body 25 and the male screw shaft 26 are formed separately, and the valve body 25 and the male screw shaft 26 are connected in a non-rotating manner by a connecting portion 33, so that the valve body 25 and the male screw shaft 26 are eccentric.

The valve according to the third embodiment shown in FIG.
The valve body 25 and the male screw shaft 26 are formed separately, and the male screw shaft 26 is formed.
Is directly rotated by the handle 30 so that the valve body 25
Is moved in the axial direction.
A female screw hole 34 into which the male screw shaft 26 is screwed is formed in an eccentric arrangement with respect to the axis a of the valve body 25 from one end to the middle, and the male screw shaft 26 screwed into the female screw hole 34 is The support member 29 is rotatable and held so as not to move in the axial direction, and the handle 30 is fixed directly to the male screw shaft 26.

Since the female screw hole 34 is eccentric with respect to the axis of the valve body 25, the male screw shaft 26 screwed into the female screw hole 34 and the valve body 25 have a relationship that their axes a and b are shifted. become.

The valve of the present invention is constructed as described above, and in the first and second embodiments, the handle 3
When the female screw member 28 is rotated at 0, a rotational force acts on the male screw shaft 26, and the valve body 2 is integrated with or fixed to the male screw shaft 26.
5, an eccentric rotational force about the axis b of the male screw shaft 26 is applied. However, since the valve body 25 is held by the packing 31 in the valve body 24, the valve body 25 cannot rotate eccentrically.
And the male screw shaft 26 is stopped from rotating, whereby a feeding action occurs between the female screw member 28 and the male screw shaft 26,
The male screw shaft 26 and the valve body 25 move by the stroke S in the axial direction without rotating, and the valve is opened or closed.

Further, in the third embodiment, when the male screw shaft 26 is rotated by the handle 30, an eccentric rotational force about the axis of the male screw shaft 26 acts on the valve body 25. Cannot be eccentrically rotated because it is held by the packing 31 in the valve body 24, and the valve body 25 is prevented from rotating, whereby the female screw hole 34 and the male screw shaft 2
6, the valve element 25 moves axially by the stroke S without rotating, and opens or closes the valve.

In the third embodiment, since the male screw shaft 26 is housed inside the valve body 25, the total length L of the valve is reduced.
2 can be made shorter than the total length L1 of the valves of the first and second embodiments.

[0021]

As described above, according to the present invention, there is provided a valve which is opened and closed by moving the valve body inserted in the valve body so as to be able to move in the axial direction in the axial direction without rotating it. By deviating the axis of the valve element and the male screw shaft, a detent state is obtained between the valve element and the male screw axis. The use of such a non-rotating member can be omitted, and the reduction in the number of parts enables simplification of assembly, disassembly, and maintenance.

By omitting the use of the rotation-stopping member, the space for mounting the rotation-stopping member becomes unnecessary, and the overall length of the valve is shortened, so that the size of the valve can be reduced.

Furthermore, there is no occurrence of abrasion or seizure due to sliding of the rotation preventing member, and the durability of the valve is improved.

[Brief description of the drawings]

1A is a longitudinal sectional front view showing a valve according to a first embodiment, FIG. 1B is an enlarged front view showing an eccentric portion between a valve body and a male screw shaft, and FIG.

FIG. 2 is a longitudinal sectional front view showing a valve according to a second embodiment;

FIG. 3A is a longitudinal sectional front view showing a valve according to a third embodiment, and FIG. 3B is an enlarged longitudinal sectional front view showing an eccentric portion between a valve body and a male screw shaft.

FIG. 4 is a longitudinal sectional front view showing a conventional valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 One connection port 22 Valve body insertion hole 23 The other connection port 24 Valve body 25 Valve body 26 Male screw shaft 27 Stay 28 Female screw member 29 Support member 30 Handle 31 Packing 32 Packing presser 33 Joining part 34 Female screw hole

Claims (2)

[Claims] 1. A male screw shaft is connected to a valve body inserted in a valve body so as to be movable in an axial direction, and a female screw part for driving screwed to the male screw shaft is rotated to form a valve body. In a valve that opens and closes by moving a valve body in the axial direction without rotating a male screw shaft, by shifting the axis of the valve body and the male screw shaft, a detent state can be obtained between the valve body and the male screw shaft. A valve characterized by: 2. A female screw hole is provided in a valve body inserted in the valve body so as to be movable in an axial direction, and a valve screw body is axially moved by rotating a male screw shaft screwed into the female screw hole. A valve which opens and closes by opening a female screw hole of the valve body with respect to an axis of the valve body so as to obtain a detented state on the valve body.