JPH0798089A - Valve opening/closing tool of branch coupler - Google Patents

Abstract

PURPOSE:To provide a valve opening/closing tool which is also used for valve opening/closing work of both branch couplers, and which may not give any damage to the sleeve part of a lining branch coupler. CONSTITUTION:A valve opening/closing tool is provided with the male screw part 16a of a tool main body which can be screwed in any one of screw the female screw part of a metal made branch coupler and the female screw part 24a of a lining branch coupler, the rotational grip part 16b of the tool main body, and a rotary shaft 17 which is arranged to freely project and retreat by penetrating the axial core part of the tool main body and whose engaging part 12 on its top end is engaged with a valve 27. And also the valve opening/ closing tool is provided with the abutting part 52 of the tool main body which freely abut on the taper surface of the metal made branch coupler and the taper surface 24c of a lining branch coupler and for carrying out positioning of the tool main body in relation to both branch couplers, and an extended part 53 between the male screw part 16a and rotary grip part 16b in the tool main body, and the abutting part 52 abuts on both branch couplers so as to carry out positioning.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutoff for a valve screwed in a trunk portion of a branch joint to close the main pipe passage side to shut off the main pipe passage and the branch passage branched from the trunk portion. The present invention relates to a valve opening / closing tool that moves between a position and a communication position that separates from a source pipe passage side and connects the source pipe passage side and a branch passage.

[0002]

2. Description of the Related Art Steel pipes and cast iron pipes have been conventionally used as gas pipes buried in the ground. When drawing gas from this gas pipe, a T-shaped branch joint is attached to the base pipe of the gas pipe, and a branch pipe is piped to a required location via this branch joint.

When the original pipe is a cast iron pipe, the thickness is large and a plurality of internal thread portions can be formed. Therefore, as shown in FIG. 5, the original pipe 1 is perforated to directly form the internal thread portion 1a. ,
A male threaded portion 3 of a metal branch joint 2 made of cast iron or the like is screwed into the female threaded portion 1a of the base pipe 1 to be fixed.

On the other hand, when the source pipe is a steel pipe, the thickness thereof is so small that the female screw portion cannot be formed sufficiently. Therefore, as shown in FIG. 6, the saddle 5 having the female screw portion 5a is attached to the source pipe 4. After mounting, the mounting location of the saddle 5 is perforated and the male threaded portion 3 of the metallic branch joint 2 is screwed onto the female threaded portion 5a of the saddle 5.

Here, in FIGS. 5 and 6, reference numeral 6 denotes an elbow pipe interposed between the metal branch joint 2 and the branch pipe 7. The metal branch joint 2 is provided with a body portion 8 whose one end side is attached to the main pipes 1 and 4, a branch pipe line 9 branched from the body portion 8, and a valve 10 installed in the body portion 8. The female screw portion 8a formed from the central portion to the upper portion of the body portion 8
A male screw portion 10a formed on the outer peripheral surface of the valve 10 is screwed into the. The upper surface of the bulb 10 has a rectangular recess 1
0b is formed, and as shown in FIG. 7, the engaging portion 12 at the tip of the valve opening / closing tool 11 is engaged with the recess 10b to rotate the valve 10. Valve 10
Approaches the source pipe passage side and approaches the source pipe passages 1b and 4a and the body portion 8
The blocking position A for blocking the branch passage 9a of the branch pipe 9 branched from the main pipe passage 1
It is movable between the b, 4a side and the communication position B for communicating the branch passage 9a. In addition, 8b is a tapered surface formed on the upper end of the body portion 8, and 13 is a valve 10
Is a rubber sealing member that is externally fitted to the lower end of the. Further, in the gas pipe, each threaded portion (male threaded portion 3,
5a, 10a, female threaded portions 1a, 8a, etc.) are formed in a taper shape so as to ensure a sealing property when they are screwed together and tightened.

Before the metal branch joint 2 is assembled to the main pipes 1 and 4, the valve 10 is arranged at a position other than the shutoff position A so as not to unnecessarily deteriorate the sealing member 13, but the main pipe 1 When the metal branch joint 2 is screwed to the first and fourth valves 4, the valve 10 is moved to the shutoff position A by the valve opening / closing tool 11 to prevent gas from the source pipes 1 and 4 from leaking from the metal branch joint 2. To do. Then, in a state of being connected to the branch pipe 7 via the metal branch joint 2 and the elbow pipe 6, as shown in FIG.
Is attached to the other end side where is not connected, and an air injector 14 and a water column gauge 15 are attached to inspect gas leakage in a portion downstream of the branch joint 2 such as the metal branch joint 2, the elbow pipe 6 and the branch pipe 7. . After that, if there is no abnormality, the air injector 14 and the water column gauge 15 are removed, the valve opening / closing tool 11 is attached, and the valve 10 is moved to the communication position B, so that the main pipe passages 1b and 4a side and the branch passage 9a. And communicate with.

As shown in FIG. 7, a valve opening / closing tool 11
Is arranged so as to be able to move back and forth through the tool main body 16 and the axial center portion of the tool main body 16, and the engagement portion 12 at the tip end portion of the valve 10
A rotary shaft 17 with a handle 17a engaged with the tool body 16, a male screw portion 16a screwed into the female screw portion 8a of the body portion 8, and a tool body 16 with respect to the body portion 8 of the branch joint 2. Rotation grip portion 16 that is gripped when rotating by rotating
b are formed. Then, with the tool body 16 screwed into the body portion 8 until the rotating grip portion 16b comes into contact with the upper end of the body portion 8, the engaging portion 12 at the tip of the rotating shaft 17 is engaged with the recess portion 10b of the valve 10. By rotating the rotary shaft 17, the valve 10 is moved within the range from the shutoff position A shown by the solid line in FIG. 7 to the communication position B shown by the phantom line in FIG. 7 to open and close the branch passage 9a.

Here, by screwing the tool main body 16 into the body portion 8 until the rotating grip portion 16b comes into contact with the upper end of the body portion 8, the valve 10 is restricted from rising from the communicating position B, and the valve 10 is The gas is prevented from leaking from the gap due to the taper between the female screw portion 8a of the body portion 8 and the male screw portion 10a of the valve 10 by being raised more than necessary.

After that, a closing plug 19 (see FIG. 9) for sealing is screwed into the upper portion of the body portion 8 to prevent gas leakage from the other end side of the body portion 8. By the way, outer pipes 1 and 4 made of steel pipe or cast iron pipe are coated on their outer peripheral surfaces so as to suppress the generation of rust, but as shown in FIG.
In recent years, a lining pipe 20 has been used in which the circumference of a steel pipe or a cast iron pipe is covered with a resin 20a or the like so that the metal portion 20b is not exposed in the outer peripheral portion, and the rust in the outer peripheral portion is further prevented. Similarly, the metal branch joint 2 is coated on the outer peripheral surface other than the threaded portion so as to suppress the generation of rust, but when the metal branch joint 2 is screwed into the main pipes 1 and 4, a predetermined fixing is performed. When chucking with a tool etc., the coating on this part may peel off and rust, so in order to eliminate this problem, in recent years, the periphery of the metal part made of steel pipe or cast iron pipe is covered with resin 22. A lining branch joint 21 has been used in which the metal is not exposed at the outer peripheral portion so that the outer peripheral portion is prevented from rusting.

In this type of lining branch joint 21, as shown in FIG. 11, the outer peripheral surface excluding the connection with the main pipe (lining pipe) 20 and the elbow pipe 28 is covered with resin 22. Further, a sleeve portion 25 made of resin is extended above the upper end edge of the body portion 24 so as to prevent water from entering the joint with the lining closing plug 23 screwed at the end of the branching work. Part 25
On the inner peripheral surface of the lining closing plug 23 (see FIG. 12)
The sealing ring 26, which is externally mounted, is closely attached to the upper portion of the male screw portion 23a. Therefore, as shown in FIGS. 13 and 14A and 14B, the valve opening / closing tool 31 used in the lining branch joint 21 has a male screw portion 16a and a rotation gripping portion 16b ( The portion having the same function as the valve opening / closing tool 11 is designated by the same reference numeral), and the sleeve portion 25 of the body portion 24 is provided.
Is extended by the extension portion 32c by a dimension corresponding to. The tool body 3 is rotated until the rotating grip portion 16b of the tool body 32 comes into contact with the edge of the sleeve portion 25 of the body portion 24.
By screwing 2 into the body portion 24, the tool body 32 can be arranged at a predetermined position.

Here, in FIG. 11, reference numeral 24a designates the body portion 2.
Female thread portion formed from the central portion to the upper portion of 4,
b is a male screw portion formed on the lower portion of the body portion 24, 24c is a taper surface formed on the upper end of the metal portion of the body portion 24, 27a is a male screw portion of the valve 27, and 27b is a rectangular shape formed on the upper surface of the valve 27. A concave portion, 27c is a rubber sealing member fitted on the lower end portion of the valve 27, and 29 is a sealing ring disposed above the male screw portion 24b of the body portion 24.

[0012]

However, according to the above-mentioned conventional configuration, the valve opening / closing tool 11 is required to open / close the valve 10 of the metal branch joint 2, and the valve 27 of the lining branch joint 21 is used. Since a valve opening / closing tool 31 is required for opening / closing, when the metal branch joint 2 and the lining branch joint 21 are appropriately used, these two valve opening / closing tools 11 and 31 are always required and work is required. The valve opening / closing tool 11
It is necessary to use 31 properly and the work becomes complicated.

When the valve opening / closing tool 31 is assembled to the lining branch joint 21, the rotating gripping portion 16b of the tool body 32 is brought into contact with the end edge 25a of the sleeve portion 25 made of a relatively soft material. At this time, the edge 25a of the sleeve portion 25 may be damaged.

The present invention solves the above problems, and an object thereof is to provide a valve opening / closing tool which can be used for valve opening / closing work of both branch joints and which does not damage the sleeve portion of the lining branch joint. To do.

[0015]

In order to solve the above problems, a first means of the present invention is to provide a lining branch in which a female thread portion formed in a body portion of a metal branch joint and a metal portion are coated with a resin. A male thread part of the tool body that can be screwed into any of the female thread part formed in the body part of the joint, and the male thread part is screwed into the female thread part of the branch joint to rotate the tool body with respect to the body part. A grip portion for rotation of the tool body that is gripped when it is made to move, a rotation shaft that is arranged so as to extend and retract through the axial center portion of the tool body and has a tip end that engages with the valve, and the metal branch The other end of the body of the joint and the abutment portion of the tool body that is abuttable on a predetermined portion of the body of the lining branch joint to position the tool body with respect to the branch joint, and the male thread portion of the tool body. Formed between the rotating grip and the lining Those having a extension portion disposed extending to a sleeve portion of a metal part and the other end edge of the body portion of the lining branch connection during fitting mounting.

Further, the second means of the present invention is the same as the first means, wherein the step portion provided on the tool body constitutes an abutment portion, and the abutment portion is formed on the body portion of the metal branch joint. And the other end of the metal portion of the body portion of the lining branch joint to position the tool body with respect to both branch joints, and the dimension of the extension portion in the extending direction is set to the sleeve portion. It is made larger than.

[0017]

With the first means, the tool main body is screwed in until the contact portion of the tool main body comes into contact with the predetermined position, and the tip end of the rotary shaft of the tool main body is engaged with the valve to rotate the metal body. It can also be used for valve opening / closing work for both branch joints made of lining and branch joints.

Further, since the contact portion of the tool main body is brought into contact with the other end portion of the metal portion of the body portion of the lining branch joint by the second means, the sleeve portion of the lining branch joint is prevented from being damaged. To be done.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. It should be noted that those having the same functions as those of the conventional one are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 1 to 4, the valve opening / closing tool 50 has a lining in which a resin 20a covers the female screw portion 8a formed in the body portion 8 of the metal branch joint 2 and the metal portion 20b. The male threaded portion 16a of the tool body 51 that can be screwed into any of the female threaded portion 24a formed in the body portion 24 of the branch joint 21 and the male threaded portion 16a are used as the branch joints 2 and 2
The rotation gripping portion 16b of the tool body 51, which is gripped when the tool body 51 is rotated with respect to the body portions 8 and 24 by being screwed into the female screw portions 8a and 24a of 1, and the axial center portion of the tool body 51. The rotary shaft 17 which is arranged so as to penetrate therethrough and whose front end engaging portion 12 engages the valves 10 and 27, the other end of the body portion 8 of the metallic branch joint 2 and the lining branch joint 21. The other end of the metal portion of the body portion 24 can be freely brought into contact with the tool body 5
1, the contact portion 52 of the tool body 51 for positioning the branch joints 2 and 21 and the male screw portion 1 of the tool body 51.
An extension formed between the 6a and the rotating grip 16b and arranged inside the sleeve portion 25 extending from the other end edge of the metal portion of the body portion 24 of the lining branch joint 21 when the lining branch joint 21 is mounted. And a section 53.

Here, the abutting portion 52 of the tool body 51 is 45
Consists of a tapered step that is inclined at an angle of
The upper side has a large diameter. And this tool body 51
The abutting portion 52 of the abutting portion 52 comes into contact with the tapered surface 8b formed on the other end portion of the body portion 8 of the metal branch joint 2, and the metal portion of the body portion 24 of the lining branch joint 21 and the like. The taper surface 24b formed at the end is in contact with the taper surface 24b. Further, as shown in FIGS. 1 and 4, the valve opening / closing tool 50 has a contact portion 5 in the tool body 51.
2 and the dimension H1 of the extending portion 53 between the rotating grip portion 16b
However, it is set to be slightly larger than the dimension H2 corresponding to the sleeve portion 25 of the body portion 24.

With the above structure, the valve opening / closing tool 5
When assembling 0 into the metal branch joint 2, as shown in FIG. 3, the male grip portion 16a of the tool body 51 is screwed into the female thread portion 8a of the metal branch joint 2 by holding the rotation gripping portion 16b. The contact portion 52 of the contact 51 is brought into contact with the tapered surface 8b of the body portion 8 of the metal branch joint 2. As a result, the valve opening / closing tool 50 is positioned at a predetermined position, and the rotary shaft 1
Valve 10 of the metallic branch joint 2 via the engaging portion 12 of
Can be engaged and rotated.

When assembling the valve opening / closing tool 50 to the lining branch joint 21, as shown in FIG.
Holding the rotating grip portion 16b, the male screw portion 1 of the tool body 51
6a is a female screw portion 2 of the body portion 24 of the lining branch joint 21
It is screwed into 4a, and the contact portion 52 of the tool body 51 is brought into contact with the tapered surface 24c of the body portion 24 of the lining branch joint 21. As a result, the valve opening / closing tool 50 is positioned at a predetermined position, and the valve 27 of the lining branch joint 21 can be engaged and rotated via the engaging portion 12 of the rotary shaft 17. In this case, the contact portion 52 of the tool main body 51 is brought into contact with the tapered surface 24c of the body portion 24 of the lining branch joint 21, and at this time, the rotating grip portion 16b is the edge of the sleeve portion 25 of the lining branch joint 21. In order to keep the distance from 25a,
The edge 25a of the sleeve portion 25 is prevented from being damaged.

In this way, the valve opening / closing tool 50 can be used for valve opening / closing work of both the branch joint 2 made of metal and the branch joint 21 made of metal, and the branch joint 2 made of metal and the branch joint 21 made of metal can be used. Even if it is used appropriately, it is only necessary to prepare the valve opening / closing tool 50, and it is not necessary to use the two valve opening / closing tools differently depending on the person doing the work as in the conventional case, so that the work efficiency is improved. improves.

[0025]

As described above, according to the present invention, in the valve opening / closing tool, the other end edge of the body portion of the metal branch joint and the other end edge of the metal portion of the body portion of the lining branch joint or in the vicinity thereof are provided. This valve opening / closing tool can be used for both branch joints of metal and lining branch joints by providing a contact portion of the tool main body that can be brought into contact with the lining location and positions the tool main body with respect to the branch joint. It can also be used for valve opening and closing work, improving work efficiency.

Further, one step portion provided on the tool body constitutes an abutting portion, and this abutting portion is used for the other end portion of the body portion of the metal branch joint and the metal portion of the body portion of the lining branch joint. The tool body is configured to be positioned with respect to both branch joints by contacting the other end, and the dimension of the extending portion in the extending direction is made larger than that of the sleeve portion, so that the abutting portion of the tool body is lined. Since it abuts against the other end of the metal portion of the body of the branch joint, the sleeve portion of the lining branch joint is prevented from being damaged and reliability is improved.

[Brief description of drawings]

FIG. 1 is a front view of a valve opening / closing tool according to an embodiment of the present invention.

2A and 2B are a plan view and a bottom view of the valve opening / closing tool.

FIG. 3 is a front cross-sectional view when the valve opening / closing tool is assembled to a metal branch joint.

FIG. 4 is a front cross-sectional view of the valve opening / closing tool assembled to a lining branch joint.

FIG. 5 is a partially cut front view of the metal branch joint attached to a base pipe made of cast iron pipe.

FIG. 6 is a partially cut front view when the metal branch joint is attached to a base pipe made of a steel pipe.

FIG. 7 is a partially cut front view of a conventional valve opening / closing tool assembled to a base pipe made of cast iron pipe.

FIG. 8 is a partially cut front view at the time of gas leak inspection of a metal branch joint or the like.

FIG. 9 is a partially cut front view of the metal branch joint when the closure plug is attached.

FIG. 10 is a partially cut front view when the lining branch joint is attached to the lining pipe.

FIG. 11 is a partially cut front view of a conventional valve opening / closing tool assembled to a base pipe made of a lining pipe.

FIG. 12 is a partially cut front view of the lining branch joint when the lining closing plug is attached.

FIG. 13 is a front view of a conventional valve opening / closing tool.

14 (a) and 14 (b) are a plan view and a bottom view of the conventional valve opening / closing tool.

[Explanation of symbols]

 1,4 Main pipe 1a, 4a Main pipe passage 8,24 Body portion 8a, 24a Female screw portion 9 Branch pipe 9a Branch passage 10,27 Valve 12 Engagement portion 16a Male screw portion 16b Rotating gripping portion 17 Rotating shaft 22 Resin 25 Sleeve Part 50 Valve opening / closing tool 51 Tool body 52 Abutting part 53 Extended part A Blocking position B Communication position

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junji Ishikawa 4-1-2, Hirano-cho, Chuo-ku, Osaka City Osaka Gas Co., Ltd. (72) Inventor Mikio Nakaoka 2--10-16 Minamikagaya, Suminoe-ku, Osaka Shinwa Sangyo Co., Ltd.

Claims (2)

[Claims] 1. A valve is internally mounted movably in a threaded state in a body portion of which one end side is attached to the source pipe side of the branch joint, and the valve is approached to the source pipe passage side and the source pipe passage and the body portion. A valve opening / closing tool for moving between a shut-off position for shutting off a branch passage branched from and a communicating position for separating the main pipe passage side and communicating the main pipe passage side and the branch passage from each other. A male threaded portion of the tool body that can be screwed into any of the female threaded portion formed in the body of the branch joint and the female threaded portion formed in the body of the lining branch joint that is coated with resin around the metal portion, The male threaded portion is screwed into the female threaded portion of the branch joint, and the rotation gripping portion of the tool body that is gripped when rotating the tool body with respect to the body portion and the axial center portion of the tool body are passed through. It is arranged so that it can move in and out, and the tip part engages with the valve Rotating shaft, and the abutment portion of the tool main body for positioning the tool main body with respect to the branch joint by being freely abuttable to the other end of the body of the metal branch joint and a predetermined portion of the body of the lining branch joint. And an extension formed in the tool body between the male screw portion and the rotating grip portion and arranged in a sleeve portion extending from the other end edge of the metal portion in the body portion of the lining branch joint when the lining branch joint is mounted. A tool for opening and closing a valve of a branch joint that has a section. 2. A step portion provided on the tool body constitutes an abutting portion, and the abutting portion is used for the other end of the body portion of the metal branch joint and the metal portion of the body portion of the lining branch joint. 2. A valve for opening and closing a branch joint according to claim 1, wherein the tool main body is positioned so as to be positioned with respect to both branch joints by contacting the other end, and the dimension of the extension portion in the extending direction is larger than that of the sleeve portion. tool.