JP2002005399A - Jig for inspection and replacement for accessory equipment with bulk storage tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely and easily execute a detaching work from a connecting valve of an accessory equipment without loosing the connecting valve. SOLUTION: This jig 20 for inspection and replacement applied when the accessory equipment 1 mounted on a neck part 7 of the bulk storage tank 100 via the connecting valve 8 is inspected or replaced is provided with a neck fixing body 11 engaged attachably/detachably by restraining mutual rotation by an outside part of the neck part 7, a fixed nut 12 engaged attachably/ detachably by restraining mutual rotation by an outside part of the connecting valve 8 and a fastening means 13 for restraining mutual rotation of the neck fixing body 11 and the fixed nut 12. The neck part 7 and the connecting valve 8 are integrated via the neck fixing body 11, the fixed nut 12 and the fastening means 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary device such as a safety valve which is attached to a neck portion fixed to a bulk storage tank of, for example, liquefied petroleum gas (hereinafter abbreviated as LPG) via a connection valve. The present invention relates to a jig for inspection and replacement of a device attached to a bulk storage applied at the time of inspection or replacement.

[0002]

2. Description of the Related Art As shown in FIG. 5, a bulk storage tank 100 of LPG or the like is provided with various attached devices in a narrow area covered by a protector 101. These various accessories include, for example, a safety valve 1, a gas extraction valve 2, a coupling for liquid intake + a liquid intake valve + a unit 3 for overfilling prevention device, a pressure equalizing valve 4, a float type liquid level meter 5, and The liquid take-out valve 6 and the like.

At this time, the safety valve 1 is mounted via a connection valve 8 to a neck portion 7 fixed to the bulk storage tank 100 by welding 100a as shown in FIG. That is, the connection valve 8 is screwed and connected to the neck portion 7 fixed to the bulk storage tank 100, and the safety valve 1 as an accessory is mounted by screwing into the connection valve 8. The connection valve 8 functions as a base valve of the screw-in type safety valve 1, and when the safety valve 1 is attached, the valve body 10 is pushed down at the tip 1 a of the safety valve 1 against the spring force of the return spring 9 to open the valve, and When the safety valve 1 is removed, the valve body 10 is automatically moved upward by the spring force of the return spring 9, and the flow path 8 a is closed by the valve body 10 to close the valve.

When the safety valve 1 needs to be inspected or replaced, the connection valve 8 is fixed with one spanner wrench or the like, the safety valve 1 is loosened with another spanner wrench or the like, and the safety valve 1 is detached from the connection valve 8. By doing so, inspection or replacement work can be performed.

[0005]

However, it is necessary to remove the safety valve 1 in a narrow area covered by the protector 101 and under the installation of other accessory equipment. Therefore, the connecting valve 8 is loosened. Performing without it requires a certain amount of skill and is a tedious task.

Accordingly, the present invention provides a jig for inspecting and replacing an accessory of a bulk storage tank, which can reliably and easily execute the operation of detaching the accessory from the connecting valve without loosening the connecting valve. The purpose is to:

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a connection valve is connected by being screwed into a neck portion fixed to a bulk storage tank, and is screwed into the connection valve. And the attached equipment is attached,
A jig for inspection and replacement of the auxiliary equipment of a bulk storage tank applied at the time of inspection or replacement of the auxiliary equipment, the neck fixing body being removably engaged with an outer part of the neck part by being restricted in mutual rotation, and It is characterized by comprising: a fixing nut that is removably engaged with an outer portion of the connection valve and is removably engaged with the coupling valve; and fastening means that restricts the mutual rotation of the neck fixing body and the fixing nut.

Therefore, in the first aspect of the present invention, the neck fixing member and the fixing nut are detachably engaged with the neck portion and the connection valve by restricting mutual rotation, respectively, and are fastened to the neck fixing member by the fastening means. By fastening the fixing nut, the neck portion and the connection valve can be integrated via the neck fixing body, the fixing nut, and the fastening means. By this integration, a fixing jig (for example, a spanner wrench or the like) for the connection valve, which has been conventionally required, is not required at the time of detachment work of the accessory device from the connection valve, and loosening of the connection valve can be reliably prevented. .

According to a second aspect of the present invention, there is provided a jig for inspecting and replacing a device attached to a bulk storage tank according to the first aspect,
The neck fixing body has a fixed side flat portion which is inserted into the neck portion and conforms to a neck side flat portion formed on an outer portion of the neck portion to restrain mutual rotation, and is formed on the upper inner side. The fixed nut has a square hole which is inserted into the connection valve and matches the square peripheral portion of the connection valve to restrain mutual rotation. And a ring body having an outer diameter that can be accommodated in the step portion, and the fastening means is accommodated in the step portion and is provided on an outer peripheral portion of the fixed nut accommodated in the step portion. It is characterized by comprising a pressing piece that abuts and a screw member that is screwed so as to be able to protrude and retract into the step and presses the pressing piece against the outer peripheral portion of the fixed nut.

For this reason, in the second aspect of the present invention, the neck fixing body is constituted by a cylindrical body which can be inserted into the neck part, and the fixing nut and the pressing piece are accommodated and assembled in the step part of the cylindrical body. Therefore, it is possible to reduce the size of the jig after assembling and avoid downsizing. In addition, the fastening means is constituted by a pressing piece and a screw member, and the fixing nut is fixed via the pressing piece, thereby preventing damage to the fixing nut and increasing the contact area, thereby stably fixing the fixing nut. A fixed state of the nut is obtained.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. Note that the same components as those shown in FIGS. 4 and 5 are denoted by the same reference numerals and described.

FIGS. 1 (a) and 1 (b) show an applied state of a jig 20 for inspection and replacement of a device attached to a bulk storage tank according to an embodiment of the present invention. In the present embodiment, the inspection and replacement jig 20 is applied to an installation site of the safety valve 1 as an accessory device. That is, as in the conventional case, the bulk storage tank 10
The connection valve 8 is connected by being screwed into the neck portion 7 fixed at 0, and the safety valve 1 is screwed into this connection valve 8
The connection valve 8 has a valve body 10 and functions as a base valve of the safety valve 1.

The inspection / replacement jig 20 is detachably engaged with the neck fixing body 11 which is removably engaged with the outer portion of the neck portion 7 and is removably engaged with the outer portion of the connection valve 8. A fixing nut 12 to be engaged with the neck fixing body 1
1 and fastening means 13 for restraining mutual rotation of fixing nut 12
It is generally configured to include:

More specifically, the neck fixing member 11 is inserted into the neck portion 7 and matches the neck side flat portion 7a formed on the outer portion of the neck portion 7 to restrict the mutual rotation.
a is formed on the inside, and a stepped portion 11b is formed on the inside of the upper part, which can accommodate the fixing nut 12.
As shown in FIGS. 2A and 2B, the neck-side flat portion 7a is formed on both upper sides of the cylindrical neck portion 7 so as to be parallel to each other. It is formed so as to be parallel to each other at an opposing portion inside the lower part of the cylindrical body. Further, the step portion 11b is formed in an annular shape such that the step portion 11b is located above the portion where the fixed side flat portion 11a is formed inside the cylindrical body and is expanded in diameter.

Further, the fixing nut 12 is shown in FIG.
As shown in FIG. 2B, a square hole 12a which is inserted into the connection valve 8 and matches the square peripheral portion 8b of the connection valve 8 to restrict mutual rotation is provided, and has an outer diameter which can be accommodated in the step portion 11b. It is composed of a ring body. The square peripheral portion 8b is hexagonal,
For this reason, the square hole 12a of the fixing nut 12 is also formed in a hexagonal shape. The outer peripheral shape of the fixed nut 12 is formed in a circular shape so that the hexagonal direction of the rectangular peripheral portion 8b of the connection valve 8 when mounting is not selected.

Further, the fastening means 13 is housed in the step 11b, and is pressed into contact with the outer periphery of the fixed nut 12 housed in the step 11b. And a screw member 15 that is screwed into the fixing member 12 and presses the pressing piece 14 against the outer peripheral portion of the fixed nut 12.

More specifically, the circular peripheral wall 11 of the step portion 11b
c, a recess 16 is formed at an equal interval in the circumferential direction and is open toward the center, and the pressing piece 14
It is accommodated in the concave portion 16 so as to be able to move forward and backward in the radial direction. In the present embodiment, the concave portions 16 are formed at three places on the circular peripheral wall 11c.

The pressing piece 14 has an abutting surface 14a that abuts on the outer peripheral portion of the fixed nut 12 is formed into a curved surface that matches the outer peripheral shape of the fixed nut 12, and the abutting surface 14a
The rear surface 14b opposite to a is formed in a flat surface, and the whole is configured in a small block shape. The screw member 15 is provided in the recess 1
6 is screwed to the circular peripheral wall 11 c so as to be able to protrude and retract into the inner surface 6, and acts so as to push the pressing piece 14 against the outer peripheral part of the fixed nut 12 by abutting the tip against the back surface 14 b by screwing.

The fastening means 1 constructed as described above
In the present embodiment, 3 is incorporated in the neck fixing body 11 to be unitized.

The inspection / replacement jig 20 configured as described above
Is applied to the place where the safety valve 1 is installed as follows.

First, the neck fixing body 11 is inserted from above the safety valve 1, and the fixed side flat portion 11a is changed to the neck side flat portion 7a.
By this, the mutual rotation is restrained to the neck portion 7 and the neck portion 7 is detachably engaged.

Next, the fixing nut 12 is inserted from above the safety valve 1, and the square hole 12 a is formed in the square peripheral portion 8 b of the connection valve 8.
, The mutual rotation of the connection valve 8 is restrained and the connection valve 8 is detachably engaged. At this time, the fixing nut 12
Is placed on the step 11b of the neck fixing body 11, and the above-mentioned engaged state is maintained.

Further, the screw member 15 is advanced to press the pressing piece 14 against the outer periphery of the fixed nut 12. Thereby, the neck part 7 and the connection valve 8 can be integrated.

That is, the neck fixing member 11 and the fixing nut 12 are detachably engaged with the neck portion 7 and the connection valve 8 by restricting the mutual rotation, and the fastening means 1 is provided.
3, the neck 7 and the connection valve 8 are connected to each other by fastening the neck fixing body 11 and the fixing nut 12.
They can be integrated via the fixing nut 12 and the fastening means 13. By this integration, a fixing jig (for example, a spanner wrench, etc.) for the connection valve 8 which has been conventionally required becomes unnecessary when the safety valve 1 is detached from the connection valve 8, and the connection valve 8 is securely prevented from being loosened. be able to. The safety valve 1 can be easily detached by, for example, engaging a spanner wrench with the square peripheral portion 1b. In the course of this separation, the connection valve 8 is closed, so that the external ejection of the gas in the bulk storage tank 100 can be prevented.

Further, in the present embodiment, the neck fixing body 11 is constituted by a cylindrical body which can be inserted into the neck part 7, and the fixing nut 12 and the pressing piece 14 are accommodated and assembled in the step part 11b of the cylindrical body. Therefore, the jig 20 after assembling can be made compact while avoiding an increase in size. Also, the fastening means 13
Is composed of a pressing piece 14 and a screw member 15, and the pressing piece 14
The fixing nut 12 is fixed via the fixing nut 12, thereby preventing damage to the fixing nut 12 and increasing the contact area, whereby a stable fixing state of the fixing nut 12 is obtained.

The jig 20 for inspection and replacement can be easily removed by releasing the safety member 1 from the connection valve 8 and then loosening the screw member 15 to release the fastening state between the neck fixing member 11 and the fixing nut 12. Can be. That is, the neck fixing body 11 and the fixing nut 12 can be detached from the neck 7 and the connection valve 8 respectively.

The jig 20 for inspection and replacement can be detached after the safety valve 1 whose inspection or replacement is completed is mounted. In this case, it is possible to prevent the connection valve 8 from being tightened more strongly when the safety valve 1 is mounted by the inspection and replacement jig 20. At this time, the screw member 15 is loosened to release the fastening state between the neck fixing body 11 and the fixing nut 12 in the same manner as described above.
The fixing nut 12 can be removed by pulling it out above the safety valve 1. The connection valve 8 is a safety valve 1
The valve is opened by mounting.

As described above, according to the jig 20 for inspection and replacement, even when the gas is being used, the inspection of the attached device (the safety valve 1) screwed and attached to the connection valve 8 can be performed without interrupting the use of the gas. The replacement work can be easily performed.

[0029]

As described above in detail, according to the first aspect of the present invention, the neck portion and the connection valve can be integrated via the neck fixing body, the fixing nut, and the fastening means. In addition, it is possible to provide a jig for inspection and replacement of the auxiliary equipment of the bulk storage tank, which can reliably and easily execute the operation of detaching the auxiliary equipment from the connection valve without loosening the connection valve.

According to the second aspect of the present invention, in addition to the effect of the first aspect, the jig after assembly can be made compact by avoiding an increase in size, and can be fixed via the pressing piece. Since the nut is fixed, the damage to the fixing nut is prevented and the contact area is increased, whereby a stable fixing state of the fixing nut is obtained.

[Brief description of the drawings]

FIG. 1 shows an application state of a jig for inspection and replacement of a device attached to a bulk storage tank as one embodiment of the present invention, where (a) is a plan view and (b) is a side view of a main part with a part cut away.

FIGS. 2A and 2B show bulk storage tank accessories before the inspection and replacement jig of FIG. 1 is applied, wherein FIG. 2A is a plan view and FIG.

3A and 3B show a fixing nut used in the inspection and replacement jig of FIG. 1, wherein FIG. 3A is a plan view and FIG. 3B is a cross-sectional view taken along line bb of FIG.

FIG. 4 is a partially cutaway side view showing the installation state of the conventional bulk storage tank accessory.

FIG. 5 is a partial plan view of a bulk storage tank showing an installation state of a conventional accessory for a bulk storage tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Safety valve (attached equipment) 7 Neck part 7a Neck side flat part 8 Connection valve 8b Square peripheral part 11 Neck fixed body 11a Fixed side flat part 11b Step 12 Fixed nut 12a Square hole 13 Fastening means 14 Pressing piece 15 Screw member 100 Bulk Storage tank

Claims (2)

[Claims] 1. A connection valve is connected by being screwed into a neck portion fixed to a bulk storage tank, and an accessory is screwed into the connection valve, and an accessory is attached. A jig for inspection and replacement of the auxiliary equipment attached to the bulk tank, wherein the neck rotation body is detachably engaged with the outer part of the neck part and is removably engaged with the outer part of the connection valve. A jig for inspection and replacement of a device attached to a bulk storage tank, comprising: a fixed nut that is removably engaged with being restrained; and fastening means that restrains mutual rotation of the neck fixed body and the fixed nut. 2. The jig for inspection and replacement of a device attached to a bulk storage tank according to claim 1, wherein the neck fixing body is inserted into the neck portion and formed on an outer side of the neck portion. A fixed side flat portion that restrains mutual rotation in accordance with is formed on the inner side, and is formed of a cylindrical body having a step portion capable of accommodating the fixed nut on the upper inner side, and the fixed nut is connected to the connection portion. The coupling means comprises a ring having a square hole which is inserted into the valve, matches the square peripheral portion of the connection valve and restricts mutual rotation, and has an outer diameter capable of being accommodated in the step portion, and the fastening means A pressing piece which is housed in the step portion and abuts on an outer peripheral portion of the fixed nut accommodated in the step portion; and And a screw member that presses against the part Inspection tool for use in replacement of the bulk storage tank accessories characterized.