JPS589449Y2 - Assembly type pipe continuity tester - Google Patents

Description

[Detailed explanation of the invention] This invention was developed to conduct an assembled conduit continuity test in which cables are inserted into a newly installed underground cable protection pipe in order to investigate bending, damage, joint conditions, etc. of the protection pipe before inserting the cable into the protection pipe. It is related to vessels.

Conventional pipe continuity testers usually test four pipes with the same diameter but different lengths depending on the degree of bend in the buried cable protection pipe.
500%, 800.1000゜1200) Take it to the work site, use one of these bags of appropriate length, insert it into one end of the buried cable protection tube, and push it in with the long rod attached to the rear end of the tester. Alternatively, insert the tester into the cable protection tube by pulling it from the other end of the protection tube with a rope or wire attached to the tip of the tester, and if this does not match the bend of the protection tube, the tester may get stuck in the middle.

Therefore, replace it with a tester of a different length and insert it into the protective tube again. If even a short tester gets stuck in the middle, it is obvious that the inside of the protective tube is blocked at that point or there is an obstruction.

In this way, the degree of bending and damage of the buried cable protection tube,
We were investigating the condition of joints, etc., but these testers are made of steel and are heavy, and in addition, several tubes of the same diameter and length must be carried to the site, which is inconvenient and difficult to transport. The work site where these testers are inserted into the buried cable protection tube is inside an extremely narrow manhole.
Conventional long products had poor workability.

This idea aims to eliminate these drawbacks by using lightweight materials with the necessary strength, such as aluminum and duralumin synthetic resin, in place of conventional steel materials, and also by making assembly easier.
As it is a disassembled type, it is lightweight and bulky when transported, and it is easy to assemble at the work site.In addition, the length of the tester can be easily changed depending on the bending of the buried cable protection tube, making it an extremely convenient tester. .

An embodiment of this invention will be described below with reference to the drawings. 1 is an end tube with a plug-in edge made of a lightweight material with necessary strength such as aluminum, with one end closed and the other end open; 2 is an opening of this end tube 1. 3 is a closed end wall of this end tube 1; 4 is a U-bolt that passes through the end of this closed end wall 3 from the outside; 5 is a closed end wall; A nut screwed onto both legs of the inner and outer U port 4 of 3 and fixing the U bolt 4 to the closed end wall 3, 6 a hole drilled in the closed end wall 3, and 7 the relative position of the outer periphery of the annular end edge 2. Bolt screwed through at the position where
9 is the screw attached to the end of the bolt 7 inside the end tube 1 with a rim.
1 is a joint made of the same material as the plug-in end pipe 1, 10 is an annular edge made by adding a step to one end of this joint 9 to reduce the diameter, and 11 is a position facing each other on the outer periphery of this annular edge 10. 12 is a bolt attached to the end of the bolt inside the joint pipe 9, 1
Reference numeral 3 denotes a key-shaped notch made in the forging die from opposite positions of the end edge opposite to the annular edge 10 of the joint pipe 9 toward the center of the outer circumference of the joint pipe 9, and 14 denotes a key-shaped cut at the inner end of the key-shaped cut. A counterbore provided on the periphery; 15 is an end tube made of the same material as the end tube 1 with an insert rim; one end is closed and the other end is open; 16 is a closed end wall of the end tube 15;
7 is a U-bolt passed through the end of the closed end wall 16 from the outside, 18 is a nut screwed onto both legs of the U-bolt 17 on the inside and outside of this closed end wall 16, and 19 is a nut screwed into the closed end wall 16. The drilled hole 20 is a key-shaped notch made in the forging mold from opposing positions of the opening edges of the end tube 15 toward the center of the outer circumference of the end tube 15, and 21 is the inner end of the key-shaped notch 20. It is a counterbore provided around the periphery of the

Then, one end of the joint pipe 9 is inserted into the outer periphery of the annular edge 2 of the end pipe 1 with an insertion rim, and the open end of the end pipe 15 is inserted into the outer periphery of the annular edge 10 of the joint pipe 9. Insert the bolts 7 of the edged end pipe 1 into the key-shaped notches 13 and the bolts 11 of the joint pipe 9 into the key-shaped cuts 20 of the end pipe 15, respectively.
and turn the end tube 15 to make the key-shaped notch 13 in 7.11.
．． 20, tighten the bolt 7.11, and fit the head of the bolt 7.11 into the counterbore 14.21.

This device has the above structure, and by simply tightening or loosening the bolts 7 and 11, the end tube 1 with an insert rim,
5 and joint pipe 9 can be separated and connected, and if several joint pipes 9 are prepared, the entire test device can be lengthened or shortened by connecting a single side or multiple joint pipes. .

As a result, the length of the tester can be easily adjusted on site depending on the degree of bending of the buried cable protection pipe, and when transporting the tester to the work site, an insertion rim with a diameter corresponding to the buried cable protection pipe that is the object to be tested is attached. It is sufficient to transport the end pipes 1, 15, and an appropriate number of joint pipes 9 to the work site.

There is no need to carry several testers of the same tube diameter and different lengths as in the past, and because it is made of lightweight material with the necessary strength, it is lightweight and easy to transport.

In addition, the connection between the end pipe 1 with a plug rim, the joint pipe 9, and the end pipe 15 of this invention is achieved by inserting the poles 7, 11 into the key-shaped notches 13, 20 of the joint pipe 9 and the end pipe 15, and Turn the tube 9 and the end tube 15, insert the bolts 7.11 into the deep part of the key-shaped notches 13 and 20, tighten the bolts 7.11, and then tighten the counterbores 14 and 21 provided at the periphery of the key-shaped deep part. Since the head of the bolt 7.11 is inserted into the tester, the tensile strength in the longitudinal direction of the connected tester is high, and there is no protrusion on the outer periphery of the tester.

In addition, in this device, holes 6°19 are bored in the closed end walls 3 and 16 of the end tube 1 and the end tube 15, respectively, so that the U-bolt 17 at the rear end of the tester has a long length, as shown in FIG. The rod 22 is fixed, the tip of the long rod 22 is inserted into the hole 19, the tester is inserted into the buried cable protection tube 23, and the long rod 22 is pushed. It is firmly supported and fixed with two U-bolts and 17 U-bolts.

As described above, this invention is easy to assemble and disassemble, and the length of the tester can be freely adjusted using similar members depending on the degree of bending of the buried cable protection tube.Therefore, it is lightweight and not bulky, making it extremely convenient to transport.

[Brief explanation of drawings]

The figures show one embodiment of this invention; Fig. 1 is an exploded partial view of this invention, Fig. 2 is a plan view of this invention, Fig. 3 is a side view of this invention, and Fig. 4 is an exploded partial view of this invention. A plan view of the joint pipe and FIG. 5 are perspective views showing the state of use of this invention. In the figure, 1 is an end tube with an insertion edge, 2 and 10 are annular edges, and 3
and 16 are closed end walls, 4 and 17 are U bolts, 7 and 1
1 is a bolt, and 13 and 20 are key-shaped notches.

Claims (1)

[Scope of utility model registration request] A plug-in edged end tube 1 made of a lightweight material with the required strength, with one end closed and the other end open, an appropriate number of joint tubes 9 made of the same material, and an end tube 1 with a required strength, with one end closed and the other end opened. An end tube 15 made of a certain lightweight material is attached to the annular edges 2 and 10 provided at the open end of the end tube 1 with a plug-in edge and one end of the joint tube 9, respectively, and the other end edge of the joint tube 9 and the end tube 15. Bolts 7 and 11 are fitted around the opening edge and are screwed through the outer periphery of the respective annular edges 2 and 10,
Insert and tighten the key-shaped notches 14 and 21 on the end edges of the joint pipe 9 and the end pipe 15, respectively, and attach the U bolts 4 and 17 ends to the outside of the closed end walls 3 and 16 of the end pipe 1 and the end pipe 15 with insertion edges. An assembly-type pipe continuity tester characterized by a fixed structure.