JPH0725507Y2 - Intermediate joint of underground power transmission line - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an intermediate joint of an underground power transmission line.

[0002]

2. Description of the Related Art In order to protect an underground power transmission line buried in the ground, a protective conduit made of FRP (fiber reinforced plastic) has been conventionally used. In the above FRP pipe line, in order to adjust the length of the pipe line between human holes,
In some cases, an FRP-made adjusting pipe is interposed, and both ends of the adjusting pipe are connected to the main pipe by intermediate joints.

The intermediate joint used in this case is composed of a pair of semi-cylindrical joint bodies that cover the abutting portions of the pipeline from both sides. The flange portions provided on both sides of each joint body along the both sides of the pipe line are connected to each other by bolts and nuts at two places at a total of four places.

[0004]

The above-mentioned pipelines are buried in a required number at the upper, lower, left, and right sides at a fixed interval, but the working space cannot be made sufficiently wide because of space restrictions.

For this reason, when the above-mentioned joint bodies are fastened to each other with bolts and nuts, it is necessary to insert a hand or a tool into a narrow space to perform the work, and there is a problem that the workability is extremely low. On the other hand, when burying a pipeline in an urban area, the road will be excavated, so it is necessary to shorten the construction period to avoid inconvenience to local residents and traffic congestion.

Therefore, it is an object of the present invention to improve the structure of the intermediate joint so that the conduits can be quickly connected even in a narrow space.

[0007]

In order to solve the above problems BRIEF SUMMARY OF THE INVENTION This invention is joint body and which the fitting 及 tightening separate from
And a water-proof packing, and the joint body is F
It is made of RP and has a cylindrical shape as a whole, a part of which is provided with a cutout portion over the entire length, engagement ribs are provided on both sides of the cutout portion, and an engagement groove is formed on the outer surface of each engagement rib. The tightening fitting connects two ends of two parallel fulcrum pins longer than the joint body and the action pin to each other by a pair of links with a gap longer than the width of both engaging ribs, and A lock piece is attached to the action pin, the fulcrum pin is engaged with one engagement groove of the joint body, and the tip end of the lock piece is engaged with the other engagement groove, respectively, so that the action pin has both the engagement grooves and a non-locked state on the outside of the neutral line connecting the engaging groove, to take two positions in the locked state in contact with the fitting body there on the inside of the neutral line
However, the above water-stop packing should be installed on both sides of the pipe joint.
It has a configuration of a cylindrical shape to be covered .

[0008]

[Operation] When connecting the main pipeline and the adjusting pipeline using the above-mentioned intermediate joint, fit the waterproof gasket at the abutting portion of both pipelines and the joint main body around the outer periphery of the waterproof gasket, and After engaging the fulcrum pin of the tightening fitting in one engagement groove and the tip of the lock piece in the other engagement groove, push down the action pin side to move the action pin beyond the neutral line and the joint body. To lock it. As a result, the cut-off portion of the joint body is pulled, and a predetermined tightening force is exerted on the water blocking packing and both pipe lines.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The intermediate joint of the first embodiment shown in FIGS. 1 to 4 comprises a joint body 1 and a fastening metal fitting 2 in combination.

The joint body 1 is made of FRP and has a main conduit 3
(See FIG. 2) and has an outer diameter slightly larger than the outer diameter of the adjusting pipe 4, and has a cylindrical shape having a length that extends over both of the abutting portions of both pipes 3, 4, and a cutout portion that extends over the entire length in a part thereof. Have 5. Shoulders 6, 6 are formed on the outer diameter surface of the joint body 1 on both sides of the cut-off portion 5, and engaging ribs 7, 7 are further formed on the shoulders 6, 6. The upper surfaces of the shoulders 6 and 6 have a required inclination angle θ (see FIG. 4) that descends as the distance from the cutoff portion 5 increases. Further, engagement grooves 8 and 8 are formed on the outer side surfaces of the engagement ribs 7 and 7, and an engagement recess 9 is formed at a rising portion of one shoulder portion 6.

The joint body 1 having the above structure has elasticity to some extent, and when an inward tightening force is applied to the outer side surfaces of the engaging ribs 7, 7, the separating portion 5 is elastically deformed so as to become narrow.

The tightening fitting 2 is composed of two parallel metal pins, which are slightly longer than the joint body 1, that is, a fulcrum pin 10 and an action pin 11.
Both ends of these pins 10 and 11 are rotatably connected by links 12 and 12, respectively. The distance between the pins 10 and 11 connected by the links 12 and 12 is formed to be larger than the outer width W (see FIG. 4) of the engaging ribs 7 and 7.

One side of the lock piece 13 is fixed to the action pin 11. The other side of the lock piece 13 is a fulcrum pin 1
The cutout 14 (see FIG. 2) is provided in the central portion of the fixed portion of the lock piece 13 in parallel with 0.
A claw piece 15 is attached rotatably around the action pin 11 through the through hole.

As shown in FIGS. 2 to 4, the above-mentioned tightening member 2 has both links 12, 12 along the outside of both end surfaces of the engaging ribs 7, 7 of the joint body 1 and the fulcrum pin 1.
By engaging 0 with the engaging groove 8 of the one engaging rib 7 and engaging the locking piece 13 with the engaging groove 8 of the other engaging rib 7, it is combined with the joint body 1.

In the unlocked state shown by the alternate long and short dash line in FIG. 4, the separating portion 5 of the joint body 1 is opened to the maximum extent, and the link 1
Nos. 2 and 12 are in a state of being inclined so that the working pin 11 side becomes higher. When the line connecting the centers of curvature of both engagement grooves 8 and 8 is referred to as the neutral line m, the action pin 11 is outside the neutral line m in the unlocked state.

Further, in the locked state shown by the solid line in FIG.
The working pin 11 is located slightly inside the neutral line m, and the working pin 11 contacts the upper surface of the one shoulder 6. Further, the claw piece 15 is engaged with the engagement recess 9 of the shoulder portion 6, and the action pin 1
The reversion of 1 is prevented.

The intermediate joint of the first embodiment is as described above, and its operation will be described below.

At the end of the main line 3, a water-stop packing 16 (see FIG. 2)
(See) and the joint body 1, and then the end face of the adjusting pipe line 4 is abutted against the end face of the main pipe line 3.
And the joint body 1 are pulled back so as to extend over the abutting portions of the two conduits 3, 4.

After that, both links 1 of the tightening fitting 2
2 and 12 are located outside both ends of the engaging ribs 7 and 7, and the fulcrum pin 10 is engaged with one engaging groove 8 and the lock piece 13 is engaged with the other engaging groove 8. This state is the unlocked state shown by the alternate long and short dash line in FIG.

Next, when the action pin 11 and the links 12 and 12 are pushed down, the action pin 11 slightly exceeds the neutral line m, and at the same time, the gap between the cut-off portions 5 is shortened and the water-stop packing 16 and the ends of the pipe lines 3 and 4 are reduced. Exerts a tightening force on the part. The tightening metal fitting 2 is locked in this state. In order to secure the lock, the claw piece 15 is inserted into the engagement recess 9 to complete the connection work.

Next, a second embodiment shown in FIGS. 5 and 6 will be described. In the intermediate joint in this case, bent portions 18, 18 are provided at both ends of the fulcrum pin 10, and the bent portion 18,
The tip of 18 is rotatably connected to both ends of the action pin 11. Further, the lock pin 19 is bent in a U-shape, and the bent end of the lock pin 19 on the action pin 11 is the fulcrum pin 10 described above.
Are rotatably connected inside the bent portions 18, 18. Nuts 20 and 21 for retaining are screwed into both ends of the action pin 11.

The bent portions 18 and 18 correspond to the links 12 and 12 in the first embodiment, and the lock pin 19 corresponds to the lock piece 13 in the first embodiment.

The "link" and "locking piece" in the claims for utility model registration are also the above-mentioned bent portions 1 respectively.
8 and lock pin 19 are included.

Further, the joint body 1 is also basically the same as in the case of the first embodiment, but in this case, only the engaging ribs 7, 7 are provided on both sides of the separating portion 5, and the joint body 1 of the first embodiment is provided. The shoulder 6 is not provided. Engaging grooves 8, 8 are provided on both sides of the engaging ribs 7, 7.

As a modified example of the second embodiment, as shown in FIGS. 7 and 8, U-shaped handle levers 23 are integrally provided at both ends of the lock pin 19 to facilitate the operation. Good. Further, the other modified examples shown in FIGS. 9 and 10 have a simpler structure, but the basic structure is the same as that of FIGS. 7 and 8.

Next, in the third embodiment shown in FIGS. 11 to 13, the threaded portion 2 is provided at both ends of the bent portions 18, 18 of the fulcrum pin 10.
Protrusions 2 and 4 provided on both sides of the lock piece 13
5 and 25 are passed through the threaded portions 24 and 24, and both ends of the action pin 11 are inserted into the respective projections 25. The above-mentioned protrusion 25 is fixed by the two lock nuts 26 and 27 at the screw portions 24 and 24.

A plate-shaped handle lever 23 is provided on the lock piece 13.

In both the second and third embodiments described above, the fulcrum pin 10 is connected to the engaging groove 8 of one engaging rib 7.
From the unlocked state in which the lock pin 19 (in the case of the second embodiment) or the lock piece 13 (in the case of the third embodiment) is engaged with the engagement groove 8 of the other engagement rib 7 The action pin 11 side is pushed down beyond the neutral line m to be locked.

[0029]

As described above, the intermediate joint of this invention is
A separate joint body mutually, is composed of a fastening bracket, the sale of engagement ribs provided on both sides of the disconnection unit of the joint body
Then, when the fulcrum pin is engaged with the engagement groove of one engagement rib,
Together, the lock piece is engaged with the engaging groove of the other engaging rib,
Then, push down the action pin to
Tighten the part of the body close to each other and attach it to the lock piece.
Since I try to lock it more tightly,
Business space is small. For this reason, many pipelines come close
Extremely convenient as a joint for underground transmission line pipelines
Yes, and can be tightened and locked with one touch,
Workability is also significantly improved. In addition, the joint body and
Both the waterproof and waterproof gaskets are cylindrical and
Move in the length direction of the
Therefore, there is no radial movement, and
Convenient for local work. Furthermore, the waterproof packing is cylindrical
Since it is, compared with the segmented, that is excellent in waterproofing effect.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a first embodiment.

FIG. 2 is a horizontal cross-sectional plan view of the same as above.

FIG. 3 is a front view of the same use condition as above.

FIG. 4 is a partially enlarged sectional view of the above.

FIG. 5 is a plan view of the second embodiment.

FIG. 6 is a partially cutaway front view of the above.

FIG. 7 is a plan view of a modification example of the above.

FIG. 8 is a partially cutaway front view of the above modification.

FIG. 9 is a plan view of another modification example of the above.

FIG. 10 is a partially cutaway front view of another modification example of the above.

FIG. 11 is a plan view of the third embodiment.

FIG. 12 is a partially cutaway front view of the above.

FIG. 13 is a partially exploded perspective view of the above.

[Explanation of symbols]

 1 Joint Main Body 2 Tightening Metal Fitting 3 Main Pipe Line 4 Adjustment Pipeline 5 Separation Part 6 Shoulder Part 7 Engagement Rib 8 Engagement Groove 9 Engagement Recess 10 Support Point Pin 11 Action Pin 12 Link 13 Lock Piece 14 Notch 15 Claw Piece 16 Water-stop packing 18 Bent portion 19 Lock pin 20, 21 Nut 23 Handle lever 24 Screw portion 25 Protrusion 26, 27 Lock nut

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shuji Tsugami 3-3-22 Nakanoshima, Kita-ku, Osaka City, Osaka Prefecture Kansai Electric Power Co., Inc. (72) Yasuto Ide 3 Nakanoshima, Kita-ku, Osaka-shi, Osaka Chome 3-22 Kansai Electric Power Co., Inc. (72) Creator Tadao Kondo 3-22 Nakanoshima, Kita-ku, Osaka-shi, Osaka Prefecture 3-22 Kansai Electric Power Co., Inc. (72) Creator Fukuya Kitahorie, Nishi-ku, Osaka-shi, Osaka 1-12-19 Kurimoto Iron Works Co., Ltd. (72) Inventor Koichiro Katayose 1-12-19 Kitahorie Nishi-ku, Osaka City Osaka Prefecture 1-12-19 Kurimoto Iron Works Co., Ltd. (72) Inventor Osamu Mizuta Nishi-ku Osaka City, Osaka Prefecture Kitahorie 1-12-19 Kurimoto Ironworks Co., Ltd. (72) Inventor Teruhiro Mihara 1-12-19 Kitahorie Nishi-ku, Osaka City, Osaka Prefecture Kurimoto Ironworks Co., Ltd. (56) References Japanese Patent Publication No. 3 -15071 (JP, B2)

Claims (1)

[Scope of utility model registration request] 1. A joint body and which with the fitting and fastening of the separate body
It consists of a combination with water-stop packing, and the joint body is FR
It is made of P and has a cylindrical shape as a whole, a part of which is provided with a cutout portion over the entire length, engagement ribs are provided on both sides of the cutout portion, and an engagement groove is formed on the outer side surface of each engagement rib. The tightening fitting connects two ends of two parallel fulcrum pins longer than the joint body and the action pin to each other by a pair of links with a gap longer than the width of both engaging ribs, and A lock piece is attached to the action pin, the fulcrum pin is engaged with one engagement groove of the joint body, and the tip end of the lock piece is engaged with the other engagement groove, respectively, so that the action pin has both the engagement grooves and a non-locked state on the outside of the neutral line connecting the engaging groove, to take two positions in the locked state in contact with the fitting body there on the inside of the neutral line
However, the above water-stop packing should be installed on both sides of the pipe joint.
An intermediate joint for underground power transmission line pipelines, which is characterized in that it has a cylindrical shape that is laid over.