JPS6255030B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small high-pressure bellows valve, and more specifically, to provide a small-sized high-pressure bellows valve that has a small number of components, is suitable for downsizing, and has excellent durability and safety. With the goal.

Conventionally, a high-pressure bellows valve as shown in FIG. 1 is known, but in this prior art, the lower end of an arcuate yoke 5 is screwed into the neck 4 of a main body 3 consisting of a body 1 and a bonnet 2. By rotating the handle 7, which is fixedly fixed and supported by the yoke 5 through the sleeve 6, the stem 9, which has a rotation stopper 8 mounted approximately in the axial center thereof, is moved in the axial direction, and is attached to the lower end of the stem 9. disk 10
The structure is such that a part of the flow path can be opened and closed using the . However, according to the above-mentioned prior art, the handle 7
Since the upper end of the stem 9 is screwed onto the inner periphery of the sleeve 6 which is fitted and fixed in the center hole, the rotation stopper 8 is not only an essential component in order to measure the vertical movement of the stem 9, but also the above-mentioned The yoke 5, which has a flange 11 integrally molded on the inside that assists in preventing rotation, is also constructed as a separate component, increasing the total number of components and making it difficult to miniaturize. Furthermore, the bellows valve described in JP-A-54-128027 does not have a rotation stopper, so it is suitable for miniaturization.
Since the valve stem is always urged upward by the spring member, there are the following problems.

Since the dome-shaped outer end of the valve stem is strongly pressed against the conical concave surface of the handle, the contact portion is easily worn, resulting in poor durability.

If you turn the handle counterclockwise from the valve closed state, the valve stem will immediately move upwards, so even if you accidentally touch the handle and rotate the handle a little, the valve will open and the valve will open. You can't expect safety.

Therefore, an object of the present invention is to provide a compact high-pressure bellows valve that is suitable for downsizing and has excellent durability and safety. A male thread is formed on the outer periphery of the neck of the handle, and a female thread formed on the inner periphery of the lower end support portion integrally formed at the lower part of the handle is screwed to the male thread to support the handle so as to be movable in the axial direction. One end of the stem is loosely inserted into the stem insertion hole, and a nut is fixed to the stem by sandwiching the handle, and the other end of the stem forming a valve portion is inserted into the main body so as to be freely retractable. A bellows is interposed between a convex part provided inside the main body by seal welding, and a gland is inserted between the neck part of the main body and the stem, and a male thread on the outer periphery of the neck part of the main body is inserted. A main body mounting nut is screwed together with the main body to sandwich the mounting base, and the spacing between the nuts is slightly larger than the thickness of the handle.

Hereinafter, one embodiment of the present invention will be described with reference to FIG. 2. 3a is a body 1a and a body 1
The main body consists of a bonnet 2a which is screwed into and fixed to the main body 3a, and a male thread 12a is cut on the outer periphery of the neck 4a of the main body 3a. A female thread 14a carved on the inner periphery of a lower end support portion 13a integrally molded at the lower part of the handle 7a is screwed into the male thread 12a to support the handle 7a, and its rotation causes the handle 7a to be rotated in the axial direction. Configure to move. Reference numeral 9a denotes a stem with a valve portion 15a formed at one end, and the other end is inserted into a stem insertion hole 16a provided at the center of the handle 7a, and the stem 9a is held in the axial direction of the handle 7a ( It is fixed in the vertical direction) and is inserted into the main body 3a so that it can move forward and backward. Note that by providing a slight gap between the stem 9a and the handle 7a, and between the handle 7a and the nuts 17a and 18a, the stem 9a can be moved relative to the handle 7a.
is configured so that it can rotate freely. Reference numeral 19a is a bellows, which is clamped by seal welding between a disk portion 20a provided on the stem 9a and a convex portion 21a provided on the main body 3a. Further, 22a is a gland that is screwed and fixed to the inner periphery of the neck portion 4a of the main body 3a.

The present invention has the above-mentioned configuration, and includes a male thread 14a carved on the inner periphery of the lower end support portion 13a integrally formed at the lower part of the handle 7a, and a male thread 12a carved on the outer periphery of the neck portion 4a of the main body 3a. The alignment position changes by rotating the handle 7a,
The handle 7a is moved up and down by rotating the handle 7a clockwise.
moves downward, so stem 9a follows this.
moves downward. Then, the stem 9a that has moved downward closes the flow path by the valve portion 15a provided at its lower end. From this state, the handle 7a
When the handle 7a is rotated clockwise, the handle 7a becomes the nut 17a.
Since the lower nut 18a is strongly pressed downward by moving downward between the lower nut 18a and the lower nut 18a, the flow path is firmly closed. Further, when the handle 7a is rotated to the left, the handle 7a pushes up the nut 17a located above the handle 7a to open the flow path, contrary to the case of the above-mentioned right rotation. In this case, when the handle 7a is rotated to the left, the handle 7a first moves upward between the nuts 18a and 17a,
After that, the nut 17a is pushed up. Furthermore, before screwing the lower end support portion 13a of the handle 7a onto the mounting base of the bellows valve main body 3a shown in FIG.
It can be easily installed by simply screwing and fixing it to a.

As described above, in the small-sized high-pressure bellows valve of the present invention, the stem does not rotate following the rotation of the handle even without providing a rotation stopper or the like. Therefore, the number of component parts is reduced, making it suitable for miniaturization. Furthermore, since the friction between the parts is small, the product has excellent durability with little wear. Since the spacing between the nuts is slightly larger than the thickness of the handle, even if the handle is rotated counterclockwise from the valve closed state, it will not immediately come into contact with the nut above and push it up. Therefore, the small-sized high-pressure bellows valve of the present invention has excellent safety because it will not open even if the handle is rotated a little if the valve accidentally comes into contact with the handle.

[Brief explanation of the drawing]

The drawings show an embodiment of the small-sized high-pressure bellows valve according to the present invention. Fig. 1 is a partially cutaway front cross-sectional view of a conventional high-pressure bellows valve, and Fig. 2 shows an embodiment of the small-sized high-pressure bellows valve according to the present invention. It is a partially cutaway front sectional view. 1, 1a... Body, 2, 2a... Bonnet, 3, 3a... Main body, 4, 4a... Neck, 5...
... Yoke, 6 ... Sleeve, 7, 7a ... Handle, 8 ... Stopper, 9, 9a ... Stem, 1
0... Disc, 11... Flange, 12a... Male thread, 13a... Lower end support, 14a... Female thread,
15a... Valve portion, 16a... Stem insertion hole, 17
a, 18a...Natsuto, 19a...Bellows, 2
0a...disc part, 21a...convex part, 22a...ground, A...mounting base, B...mounting nut.

Claims (1)

[Claims] 1 A male thread 12a is carved on the outer periphery of the neck portion 4a of a main body 3a consisting of a body 1a and a bonnet 2a screwed and fixed to the body 1a.
The handle 7a is supported movably in the axial direction by screwing a female thread 14a cut into the inner periphery of the lower end support part 13a integrally formed at the lower part of the handle 7a into the stem insertion hole 16a of the handle 7a. While loosely inserting one end of the stem 9a,
a with the handle 7a between the nuts 17a, 1
8a is fixed, and the other end of the stem 9a on which the valve portion 15a is formed is inserted into the main body 3a so as to be freely retractable, and between the disk portion 20a provided on the stem 9a and the convex portion 21a provided inside the main body 3a. A bellows 19a is sandwiched between the neck portion 4a of the main body 3a and the stem 9a with a sealing solution, and a ground 22a is inserted between the neck portion 4a of the main body 3a and the stem 9a.
is inserted into the body 3a, and a body mounting nut B for sandwiching the mounting base A between the body 3a and the body 3a is screwed onto the external thread 12a on the outer periphery of the neck portion 4a of the body 3a, and the spacing between the nuts 17a and 18a is as described above. Handle 7
A small high-pressure bellows valve characterized by having a thickness slightly larger than that of a.