JP2010106902A - Vessel valve and its attaching method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vessel valve which can reduce the possibility that cracks may be generated in a vessel attachment section even when an external force such as impact is applied to the vessel valve, and its attaching method. <P>SOLUTION: A vessel attachment section 3 is arranged in projection on the periphery of a housing body 2; a taper male screw 9 is formed on the vessel attachment section; a taper female screw 11 is formed on the valve attachment section 10 of a gas vessel 8; the vessel attachment section is fixed to the valve attachment section by screwing the male screw to the female screw; a screw length L2 of the male screw is made shorter than the interfit length of L0 of the vessel attachment section when the male screw is fastened to the female screw with a proper torque; and the maximum crest diameter d4 of the male screw is set to 105% or less of the maximum root diameter d1 of the female screw. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a container valve attached to a gas container and a method for attaching the container valve, and more particularly to a container valve and a method for attaching the container valve that reduce the possibility of cracking in the container attaching portion even when an external force such as impact is applied to the container valve.

  For example, as shown in FIG. 5, a conventional container valve attached to a high-pressure gas container has a container mounting portion (52) protruding from the outer surface of a housing body (51), and a tip of the container mounting portion (52). There is a taper male thread (53) having a smaller diameter (see, for example, Patent Document 1). The valve mounting portion (55) of the gas container (54) is formed with a taper female thread (56), and by screwing the male thread (53) into the female thread (56), the container valve (50 ) Container mounting portion (52) is fixed to the valve mounting portion (55). A gas extraction path (57) is formed in the container mounting portion (52), and the stored gas in the gas container (54) is stored in a state where the container valve (50) is mounted on the gas container (54). The gas is taken out to a gas consuming device (not shown) through the gas extraction path (57).

  When fixing the container mounting portion (52) to the valve mounting portion (55), the male screw (53) is inserted into the female screw (56) with a predetermined appropriate torque in order to ensure the sealing performance between them. The female screw (56) is slightly enlarged in diameter by the tightening force. The thread length (L2) of the male screw (53) is longer than the insertion allowance length (L0) of the container mounting portion (52) screwed by the above tightening, and the container valve ( Even when 50) is remounted, the male screw (53) is securely screwed into the female screw (56). For example, according to JIS B8246, in the case of the symbol V1, the reference diameter is 20.000 mm, which is equal to the maximum valley diameter of the female thread of the gas container to be mounted. The margin length is 15 to 17 mm. On the other hand, as for the dimensions of the container valve, the thread length of the male screw is 22 mm and the maximum thread diameter is 21.2 mm, which is 106% of the maximum valley diameter of the female thread.

JP 2002-181298 A

  In the conventional container valve, since the thread length of the male screw is long and the maximum thread diameter of the male screw is large, the container valve attached to the gas container is such that the large-diameter side of the male screw is the female thread. It is in a state exposed to the outside. When an impact is applied to the container valve in this attached state, the container attaching portion whose tip is fixed to the gas container is likely to be deformed. At this time, the male screw formed in the container mounting portion is prevented from being deformed because the small-diameter tip side portion is screwed into the female screw of the gas container and is securely held. The large-diameter side portion exposed to the space tends to concentrate stress particularly in the vicinity of the gas container and may be greatly deformed. In addition, since the screw thread is formed in the male screw, if the stress concentrates on the exposed part and deforms, cracks are likely to start from the valley part of the male screw, and the gas extraction path passes through the crack. There is a possibility that the stored gas in the gas container leaks from the crack.

  The technical problem of the present invention is to provide a container valve and a method for mounting the same, which eliminates the above-mentioned problems and reduces the possibility of cracking in the container mounting portion even when an external force such as an impact is applied to the container valve. is there.

In order to solve the above-described problems, the present invention is described as follows, for example, based on FIGS. 1 to 4 showing an embodiment of the present invention.
That is, the present invention 1 relates to a container valve, and a container mounting portion (3) is projected from the outer surface of the housing body (2), and a tapered male screw (9) having a smaller diameter is formed at the tip of the container mounting portion (3). The above-mentioned container mounting part (3) is attached to the valve by attaching the male screw (9) to the taper female thread (11) formed in the valve mounting part (10) of the gas container (8). A container valve which is fixed to the portion (10) and through which a stored gas in the gas container (8) is taken out via a gas extraction path (7) formed in the container attachment portion (3), The thread length (L2) of the male screw (9) is the insertion allowance length (L0) of the container mounting portion (3) when the male screw (9) is fastened to the female screw (11) with an appropriate torque. ) Is shorter than ().

  Further, the present invention 2 relates to a container valve, and a container mounting portion (3) projects from the outer surface of the housing main body (2), and a tapered male screw (9) having a smaller diameter is formed at the tip of the container mounting portion (3). The above-mentioned container mounting part (3) is attached to the valve by attaching the male screw (9) to the taper female thread (11) formed in the valve mounting part (10) of the gas container (8). A container valve which is fixed to the portion (10) and through which a stored gas in the gas container (8) is taken out via a gas extraction path (7) formed in the container attachment portion (3), The maximum thread diameter (d4) of the male screw (9) is 105% or less of the maximum valley diameter (d1) of the female thread (11).

  Further, the present invention 3 relates to a method for mounting a container valve, wherein a container mounting portion (3) is projected on the outer surface of the housing body (2), and a tapered male screw (9) is formed on the container mounting portion (3). By screwing the male screw (9) into the taper female screw (11) formed in the valve mounting part (10) of the container (8), the container mounting part (3) is attached to the valve mounting part (10). A method for mounting a container valve to be fixed, characterized in that the large end diameter portion (12) of the male screw (9) is screwed inwardly from the large end diameter portion of the female screw (11). .

  In the present invention 1, the thread length of the male screw is shorter than the insertion allowance length of the container mounting portion when tightened with an appropriate torque. In the present invention 2, the maximum thread diameter of the male screw is the maximum of the female screw. Since the dimension is 105% or less of the valley diameter, when the container valve is attached to the gas container, the large end diameter portion of the male screw is larger than the large end diameter portion of the female screw as in the present invention 3 described above. Is also screwed inward. As a result, when an external force such as an impact is applied to the container valve in this attached state, the male screw is not easily deformed because the entire male screw is screwed into the female screw and is not easily deformed. Of these, the screw groove is not formed in the portion located outside the gas container and exposed to the external space, so that the occurrence of cracks is prevented even if the exposed portion is deformed.

  Here, the above-mentioned appropriate torque in the present invention differs depending on the stored gas pressure in the gas container, the opening diameter of the valve mounting portion, the material of the gas container and the container valve, the structure and dimensions of the container valve, etc. Torque that is greater than the maximum permissible torque that does not cause excessive torsional stress that may cause damage such as damage to the container valve or gas container. Say.

Since the maximum thread diameter of the male screw is 105% or less of the maximum valley diameter of the female thread, the entire male thread can be screwed into the female thread by tightening with an appropriate torque. A size of 103.5% or less of the maximum valley diameter of the female screw is preferable because it can be more reliably screwed into the female screw, and a size of 102.5% or less is more preferable.
In addition, said female screw says the part except this chamfering, when the chamfering is given to the large diameter side edge part. Moreover, the screw length of said male screw means the length of an effective screw part.

  Since the male screw screwed into the female screw has the screw thread of the large end diameter portion arranged between the screw threads of the female screw, the large screw end portion of the male screw is securely held by the female screw, When an external force is applied to the valve, it is preferable that deformation of the male screw can be prevented more satisfactorily.

  The container mounting portion is not limited to a specific shape or structure, but the maximum thread diameter of the male screw is between the large end diameter portion of the male screw and the housing body of the container mounting portion. If the thin small-diameter portion is formed over a length of 4 mm or more, the small-diameter portion is easily deformed when the container valve is subjected to the external force. By absorbing the external force by this deformation, the housing main body or Each constituent member such as a shut-off valve and a safety valve arranged in the main body is preferable because it can reduce the possibility of functional deformation due to large deformation.

Since the present invention is configured and operates as described above, the following effects can be obtained.
That is, in the container valve attached to the gas container, the entire male screw of the container mounting portion is screwed into the female screw of the gas container, and is located outside the gas container in the container mounting portion and exposed to the external space. Since the thread groove is not formed in the portion where the screw is present, the external thread portion is not easily deformed even when an external force such as an impact is applied to the container valve in this attached state. In addition, since the screw groove is not formed in the portion located outside the gas container and exposed to the external space, the possibility of cracking even if deformed by the above external force can be reduced. Gas leakage can be prevented.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a first embodiment of the present invention, FIG. 1 is a front view of a container valve attached to a gas container, FIG. 2 is an enlarged view of the vicinity of a container attachment part immediately before being attached to the gas container, and FIG. FIG. 2 is an enlarged cross-sectional view of a portion A in FIG. 1.

  As shown in FIG. 1, the housing body (2) of the container valve (1) has a container mounting portion (3) projecting from the lower outer surface, and a gas is disposed at the lower end surface of the container mounting portion (3). The inlet (4) is open. An extraction nozzle (5) is provided in the upper part of the housing body (2), and a gas outlet (6) is opened on the upper surface of the extraction nozzle (5). A gas extraction path (7) is formed between the gas outlet (6) and the gas inlet (4), and a shut-off valve (not shown) is provided in the middle of the gas extraction path (7). . By opening this shut-off valve, the stored gas in the gas container (8) is taken out through the gas take-out passage (7) and connected to the take-out nozzle (5). Supplied to the equipment.

  The container mounting portion (3) has a tapered male screw (9) with a smaller diameter at the outer peripheral surface on the lower end side. On the other hand, the gas container (8) has a taper female thread (11) formed in the valve mounting part (10), and the male thread (9) is screwed onto the female thread (11). The container mounting portion (3) is fixed to the valve mounting portion (10). The container mounting portion (3) has a maximum root diameter of the male screw (9) between the large end diameter portion (12) of the male screw (9) and the housing body (2). A smaller diameter portion (13) is formed over a length of 4 mm or more. The outer peripheral surface of the small diameter portion (13) and the large end diameter portion (12) of the male screw (9) are connected by a smooth curved surface.

  As shown in FIG. 2, the thread length (L2) of the male screw (9) is such that the male screw (9) is tightened into the female screw (11) with an appropriate torque. ) Is shorter than the insertion allowance length (L0). Specifically, for example, in the case of the symbol V1 defined in JIS B8246, when the tightening is performed with an appropriate torque as described above, the allowance length (L0) of the container mounting portion (3) is 15 to 17 mm. On the other hand, the screw length (L2) of the male screw (9) is 14 mm.

  The maximum thread diameter (d4) of the male screw (9) is set to a dimension of 105% or less of the maximum valley diameter (d1) of the female thread (11). That is, in the above specific example, the maximum valley diameter (d4) of the male screw (9) is about 20.3 mm, which is the maximum valley diameter (d1) of the female screw (11) of the gas container (8). ) Corresponds to a dimension of about 101.5% of 20.0 mm.

  As a result of the above dimension setting, the container mounting portion (3) of the container valve (1) is twisted to the valve mounting portion (10) of the gas container (8) with an appropriate torque, for example, a tightening torque of 250 N · m. As shown in FIGS. 1 and 2, the male screw (9) is screwed inwardly from the large end diameter portion of the female screw (11) as shown in FIGS. (9) is in a state of being screwed onto the female screw (11) over the entire length. Therefore, as shown in FIG. 3, the large-end diameter portion (12) of the male screw (9) has a thread (14) of the male screw (9) that is a thread (15) of the female screw (11). It is in a state of being disposed between, and is securely held by the female screw (11).

  When the container valve (1) is attached to the gas container (8) and an impact (W) is applied to the upper position of the container valve (1) as shown in FIG. The male screw (9) is securely held by the female screw (11). As a result, the possibility that the male screw (9) is cracked or broken can be reduced, and gas leakage from the male screw (9) is prevented. On the other hand, the small-diameter portion (13) is deformed by the impact described above, but the small-diameter portion (13) is not formed with a thread groove and is connected to the male screw (9) with a smooth curved surface. Bending stress and shearing stress are not concentrated on a specific part, and there is no possibility of causing cracks or fractures. Further, the impact (W) is absorbed by the deformation of the small diameter portion (13), thereby preventing the deformation of the housing body (2) and the internal mechanism, and the opening / closing function of the shut-off valve is maintained. The gas extraction path (7) can be closed.

  In said 1st Embodiment, the container valve which provided the gas outlet in the upper surface of the housing main body (2) was demonstrated. However, the container valve of the present invention only needs to have a tapered male thread in the container mounting portion, and the shape of the housing main body, the formation position of the gas outlet, and the like are not limited to specific ones. For example, a take-out nozzle may be provided in the middle in the vertical direction of the housing body, and a gas outlet may be opened in the take-out nozzle. In addition, the container valve of the present invention can be applied to an internal mechanism such as a shut-off valve or a safety valve, an open / close handle or the like having an arbitrary shape, structure, and arrangement.

  In the second embodiment shown in FIG. 4, a gas outlet (6) is opened on the side surface of the housing body (2), and a yoke (not shown) is attached to the gas outlet (6) so that the inside of the gas container (8). This is applied to a so-called yoke-type container valve from which the stored gas is taken out.

  Also in the second embodiment, similarly to the first embodiment, the container mounting portion (3) is formed with the tapered male screw (9) and the small diameter portion (13) in order from the lower end side, and this male screw (9 ) Screw length (L2) is shorter than the insertion allowance length (L0) when screwed into the female screw (11) formed in the valve mounting part (10) of the gas container (8). For example, it is 14 mm. The maximum thread diameter (d4) of the male screw is 105% or less of the maximum valley diameter of the female thread (11), specifically, 101.5%. Therefore, also in the second embodiment, the male screw (9) is screwed inward from the large end diameter portion of the female screw (11) by tightening with an appropriate torque, for example, 250 N · m. .

[Results of impact test]
Next, the behavior when an impact was applied to the container valve was observed in comparison with a conventional container valve. The container valve used in the test is that of the second embodiment, and the male thread has a thread length of 14 mm and a maximum peak diameter of 20.3 mm. This corresponds to 101.5% of 0 mm. The conventional container valve used for comparison has a male thread length of 22 mm and a maximum peak diameter of 21.2 mm, which is 106% of the maximum valley diameter of the female thread. The other dimensions and structure of the conventional container valve are the same as those in the second embodiment.

  Each said container valve was attached to the gas container by screwing in with an appropriate torque, respectively, and the allowance length of the container attaching part was 16 mm. In this state, as shown in FIG. 4, an impact (W) having a work amount of 400 J was applied from the side to a height position of about one third from the upper end of the container valve. As a result, in the container valve of the present invention, the male screw (9) was held almost entirely by the female screw (11), and thus was hardly deformed. Moreover, although the said small diameter part (13) provided above the external thread (9) greatly curved and deformed, the crack and fracture | rupture did not arise in this part. In addition, because the above-mentioned impact was absorbed by the deformation of the small diameter portion (13), the deformation in the housing body (2) was suppressed, and the opening / closing function of the shut-off valve was maintained.

  On the other hand, in the conventional container valve, the portion of the male screw that is screwed with the female screw was hardly deformed, but it was located outside the female screw and exposed to the external space. The part that was bent was greatly curved and deformed. And in the site | part extended by this deformation | transformation, the crack of the said male thread | valve was produced, and the gas extraction path was in the state connected to external space through this crack.

  The container valve and its mounting method described in each of the above embodiments are illustrated to embody the technical idea of the present invention, and the shape, structure, arrangement, etc. of each part such as the housing main body are shown in this embodiment. The present invention is not limited to those described above, and various modifications can be made within the scope of the claims of the present invention.

  For example, the thread length and the maximum valley diameter of the male screw are not limited to those of the above embodiment, and are appropriate according to the stored gas pressure of the gas container, the required sealing performance, the material of the container valve, the structure, etc. Set to the correct dimensions. In the above embodiment, the small-diameter portion (13) formed in the container mounting portion has a cylindrical outer peripheral surface. However, in the present invention, the outer peripheral surface of the small diameter portion may be a conical surface or another curved surface. Further, a large diameter portion thicker than the small diameter portion may be formed between the small diameter portion and the housing main body, and the outer peripheral surface of the large diameter portion can be formed into an arbitrary shape such as a screw shape. .

  The container valve and the mounting method of the present invention are particularly suitable for a valve device for a high-pressure gas container because the risk of cracking in the container mounting portion can be reduced even when an external force such as an impact is applied to the container valve. It is also suitable for the gas container valve device.

It is a front view of the container valve attached to the gas container which shows 1st Embodiment of this invention. It is an enlarged view near a container attachment part of a container valve just before attaching to a gas container of a 1st embodiment. It is an expanded sectional view of the A section of FIG. It is a front view of a container valve showing a 1st embodiment of the present invention. It is a figure equivalent to FIG. 1 which shows a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Container valve 2 ... Housing main body 3 ... Container attachment part 7 ... Gas extraction path 8 ... Gas container 9 ... Male screw
10… Valve mounting part
11 ... Female thread
12 ... Large end diameter part of male screw (9)
13 ... Small diameter part
14 ... Thread of male screw (9)
15 Thread of female thread (11)
d1 ... Maximum valley diameter of female thread (11)
d4: Maximum thread diameter of male screw (9)
L0: Length of allowance for container mounting part (3)
L2 ... Thread length of male screw (9)

Claims (5)

A container mounting portion (3) projects from the outer surface of the housing main body (2), and a tapered male screw (9) having a smaller diameter is formed on the container mounting portion (3) toward the tip. By screwing the male screw (9) into the taper female screw (11) formed in the valve mounting part (10), the container mounting part (3) is fixed to the valve mounting part (10). A container valve for taking out the stored gas in the gas container (8) via a gas extraction path (7) formed in the container mounting portion (3),
The thread length (L2) of the male screw (9) is the insertion allowance length of the container mounting portion (3) when the male screw (9) is fastened to the female screw (11) with an appropriate torque ( A container valve characterized by having a shorter dimension than L0). A container mounting portion (3) projects from the outer surface of the housing main body (2), and a tapered male screw (9) having a smaller diameter is formed on the container mounting portion (3) toward the tip. By screwing the male screw (9) into the taper female screw (11) formed in the valve mounting part (10), the container mounting part (3) is fixed to the valve mounting part (10). A container valve for taking out the stored gas in the gas container (8) via a gas extraction path (7) formed in the container mounting portion (3),
A container valve characterized in that the maximum thread diameter (d4) of the male screw (9) is 105% or less of the maximum valley diameter (d1) of the female thread (11).   Between the large end diameter portion (12) of the male screw (9) and the housing body (2), a small diameter portion (13) thinner than the maximum valley diameter of the male screw (9) is 4 mm or more. The container valve according to claim 1, wherein the container valve is formed over a length. A container mounting part (3) is projected on the outer surface of the housing body (2), a tapered male screw (9) is formed on the container mounting part (3), and formed on the valve mounting part (10) of the gas container (8). A container valve mounting method for fixing the container mounting portion (3) to the valve mounting portion (10) by screwing the male screw (9) into the tapered female screw (11).
A method for mounting a container valve, wherein the large end diameter portion (12) of the male screw (9) is screwed inwardly from the large end diameter portion of the female screw (11).   The method for mounting a container valve according to claim 4, wherein the thread (14) of the large end diameter portion (12) of the male screw (9) is disposed between the threads (15) of the female screw (11). .

Images