JPH0542887U - Intermediate joint of underground power transmission line - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an intermediate joint that can quickly connect both pipelines when connecting the main pipeline and the length adjusting pipeline in the middle of the underground transmission line pipeline. [Structure] A combination of a joint body 1 and a tightening metal fitting 2 is formed, and the joint body 1 has a cylindrical shape. The metal fitting 2 connects both ends of the fulcrum pin 10 and the action pin 11 with links 12, and a lock piece 13 is attached to the action pin 11, the fulcrum pin 10 is engaged with one engagement rib 7, and the lock piece 13 is the other. The engaging pin 7 is engaged with the engaging rib 7 to push down the action pin 11 beyond the neutral line m to lock it.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to an intermediate joint of an underground power transmission line.

[0002]

[Prior Art]

 In order to protect the underground power transmission line buried in the ground, a protection pipeline made of FRP (fiber reinforced plastic) has been conventionally used. In the above-mentioned FRP pipe, in order to adjust the length of the pipe between human holes, there is an FRP adjustment pipe in the middle, and both ends of the adjustment pipe are intermediate. It may be connected to the main pipe with a joint.

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. After fitting the water-stop packing to the abutting portions of the pipeline, each joint body Are arranged along both sides of the pipe, and the flange parts provided on both sides of each joint body are connected with bolts and nuts at two places, totaling four places.

[0004]

[Problems to be solved by the device]

 The above-mentioned pipelines are buried in the required number in the vertical and horizontal directions at a fixed interval, but the working space cannot be made sufficiently wide due to local restrictions.

Therefore, when the 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 workability is extremely low. On the other hand, when burying pipes in urban areas, roads will be excavated, so it is necessary to shorten the construction period to avoid inconvenience to local residents and traffic congestion.

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

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention consists of a combination of a joint body and a tightening fitting, and the joint body is made of FRP and has a cylindrical shape as a whole, and a part of which has a cut-off portion over the entire length. It is provided with engaging ribs on both sides of the separated part, and engaging grooves are formed on the outer side surface of each engaging rib. The tightening metal fittings are two parallel fulcrums that are longer than the joint body. Both ends of the pin and the action pin are connected by a pair of links with an interval longer than the width of the engaging ribs on both sides, and a lock piece is attached to the action pin. The one end of the lock piece is engaged with the other engagement groove in the one engagement groove, and the action pin is in the unlocked state outside the neutral line connecting the engagement grooves. A lock located inside the neutral line that contacts the fitting body. It is obtained by a configuration to take two positions in the state.

[0008]

[Action]

 When connecting the main pipeline and the adjustment pipeline using the above-mentioned intermediate joint, fit the waterproof gasket at the abutting part of both pipelines and the fitting main body on the outer periphery of the waterproof packing, and After engaging the fulcrum pin of the tightening bracket with the engaging groove of and the engaging end of the lock piece with the other engaging groove, push down the action pin side and move the action pin over the neutral line to the joint body. Make contact and lock. 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]

【Example】

 The intermediate joint of the first embodiment shown in FIGS. 1 to 4 comprises a combination of a joint body 1 and a fastening member 2.

The joint body 1 is made of FRP and has an outer diameter slightly larger than the outer diameters of the main conduit 3 (see FIG. 2) and the adjusting conduit 4, and both of the abutting portions of both conduits 3 and 4 are joined together. It has a cylindrical shape extending over the entire length, and has a cutout 5 extending over the entire length in a part thereof. 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. Engagement grooves 8 are formed on the outer side surfaces of the engagement ribs 7 and 7, and an engagement recess 9 is formed at the rising portion of one shoulder 6.

The joint body 1 having the above-mentioned 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 has two parallel metal pins, which are slightly longer than the joint body 1, that is, a fulcrum pin 10 and an action pin 11, and both ends of these pins 10 and 11 are linked to links 12 and 12, respectively. It is rotatably connected by. The distance between the pins 10 and 11 connected by the links 12 and 12 is formed to be longer 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 parallel to the fulcrum pin 10, and a notch 14 (see FIG. 2) is provided in the center of the fixed portion of the lock piece 13, and the action pin 11 is rotated through the notch 14. A claw piece 15 is rotatably attached to the.

As shown in FIG. 2 to FIG. 4, the tightening fitting 2 has both links 12, 12 along the outer sides of both end surfaces of the engaging ribs 7, 7 of the joint body 1 and a fulcrum pin. By engaging 10 with the engaging groove 8 of 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 links 12 and 12 are 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.

In the locked state shown by the solid line in FIG. 4, the action pin 11 is located slightly inside the neutral line m, and the action 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 to prevent the action pin 11 from returning.

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

After passing the waterproof packing 16 (see FIG. 2) and the joint body 1 at the end of the main conduit 3, the end surface of the adjusting conduit 4 is butted against the end surface of the main conduit 3, and 16 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 12, 12 of the tightening metal fitting 2 are positioned outside both ends of the engaging ribs 7, 7, and the fulcrum pin 10 is engaged with one of the engaging grooves 8 and is locked. The piece 13 is engaged with the other engagement groove 8. This state is the non-locked state shown by the one-dot chain 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 reduced 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 tips of the bent portions 18, 18 are rotatably connected to both ends of the action pin 11. Further, the lock pin 19 is bent in a U-shape, and its bent end is rotatably connected on the action pin 11 inside the bent portions 18, 18 of the fulcrum pin 10. Locking nuts 20 and 21 are screwed onto both ends of the action pin 11.

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

The “link” and the “lock piece” in the claims for utility model include the bent portion 18 and the lock pin 19, respectively.

Further, the joint body 1 is basically the same as that 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, the 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, threaded portions 24 and 24 are provided at both ends of the bent portions 18 and 18 of the fulcrum pin 10, and projections 25 provided on both sides of the lock piece 13 are provided. No. 25 is passed through the screw portions 24, 24, and both ends of the action pin 11 are inserted into each protrusion 25. The above-mentioned protrusion 25 is fixed by two lock nuts 26 and 27 at the screw portions 24 and 24.

The lock piece 13 is provided with a plate-shaped handle lever 23.

In any of the above-described second and third embodiments, the fulcrum pin 10 is engaged with the engaging groove 8 of the one engaging rib 7, and the lock pin 19 (of the second embodiment is used). Case) or the lock piece 13 (in the case of the third embodiment) is engaged with the engaging groove 8 of the other engaging rib 7 from the unlocked state, and the action pin 11 side is pushed down beyond the neutral line m to lock. It is what makes them.

[0029]

[Effect of the device]

 As described above, the intermediate joint of the present invention is composed of the joint body and the tightening metal fittings which are independent of each other, and the fasteners are fitted to the engaging ribs provided on both sides of the cutout portion of the joint body. Since it is fastened with one touch, it is easy to handle even in a narrow space and has the effect of significantly improving workability.

[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 Fitting 3 Main Pipeline 4 Adjustment Pipeline 5 Separation Part 6 Shoulder Part 7 Engaging Rib 8 Engaging Groove 9 Engaging Recess 10 Support Point Pin 11 Working Pin 12 Link 13 Lock Piece 14 Notch 15 Claw Piece 16 Water-stop packing 18 Bent section 19 Lock pin 20, 21 Nut 23 Handle lever 24 Screw section 25 Protrusion 26, 27 Lock nut

Front page continuation (72) Inventor Shuji Tsugami, 3-3-22 Nakanoshima, Kita-ku, Osaka City, Kansai Electric Power Co., Inc. (72) Instructor, Yasuhito Ide 3--22, Nakanoshima, Kita-ku, Osaka Kansai Electric Power Co., Ltd. (72) Inventor Tadao Kondo 3-3-22 Nakanoshima, Kita-ku, Osaka City Kansai Electric Power Co., Inc. (72) Inventor Fukuya Riho 1-12-19 Kitahorie, Nishi-ku, Osaka Kurimoto Ironworks Co., Ltd. (72) Koichiro Katayose Koichiro Katayose 1-12-19 Kitahori, Nishi-ku, Osaka Stock Company Shari Kurimoto Ironworks (72) Inventor Osamu Mizuta 1-12-19 Kitahori, Nishi-ku, Osaka City Stock Association Kurimoto Ironworks Co., Ltd. (72) Inventor Teruhiro Mihara 1-12-19 Kitahorie, Nishi-ku, Osaka City Stock Company Kurimoto Ironworks Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A combination of a joint main body and a tightening metal fitting, wherein the joint main body is made of FRP and has a cylindrical shape as a whole, a part of which is provided with a cutout portion over the entire length and both sides of the cutout portion. Engaging ribs are provided, and engaging grooves are formed on the outer side surface of each engaging rib. The tightening metal fitting has two parallel fulcrum pins longer than the joint body and both ends of the action pin. Is connected by a pair of links at a distance longer than the width of the engaging rib, and a lock piece is attached to the action pin, and the fulcrum pin is provided in one engagement groove of the joint main body with the lock piece. Of the engaging pin is engaged with the other engaging groove, and the action pin contacts the joint body inside the neutral line and outside the neutral line connecting the engaging grooves. It features two positions in the locked state. Intermediate joint of underground transmission line pipeline to be considered.