JPH0517494B2 - - Google Patents
Info
- Publication number
- JPH0517494B2 JPH0517494B2 JP63109602A JP10960288A JPH0517494B2 JP H0517494 B2 JPH0517494 B2 JP H0517494B2 JP 63109602 A JP63109602 A JP 63109602A JP 10960288 A JP10960288 A JP 10960288A JP H0517494 B2 JPH0517494 B2 JP H0517494B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- rubber ring
- pipe
- stopping
- joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 54
- 238000012360 testing method Methods 0.000 claims description 20
- 238000007689 inspection Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Landscapes
- Examining Or Testing Airtightness (AREA)
- Joints With Sleeves (AREA)
Description
【発明の詳細な説明】
ａ 産業上の利用分野
本発明は、管体継手部の構造及び管体継手部の
水密検査方法に関する。DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to the structure of a pipe joint and a watertight inspection method for a pipe joint.
ｂ 従来の技術
従来、埋設管路の継手部における止水性はテス
トバンド方式の水密検査によつて確認されてい
た。b. Prior Art Conventionally, the watertightness of joints in buried pipes has been confirmed by watertightness testing using a test band method.
かかる検査方法は、第９図あるいは第１０図に
示す如く、管体１０１の継手部１０２の内壁面側
にジヨイント試験機１０３を挿入し、ジヨイント
試験機１０３と管体１０１の内壁面側との間隙で
あつて、かつ管体継手部１０２の両側にあたる部
分に１対のゴム輪１０４を挿入することにより、
継手部１０２の内壁面側に水路１０５を形成し、
該水路１０５に連通する注入孔１０６より加圧水
を注入することにより確認するものであつた。 In this inspection method, as shown in FIG. 9 or 10, a joint tester 103 is inserted into the inner wall side of the joint 102 of the tube body 101, and the joint tester 103 and the inner wall side of the tube body 101 are tested. By inserting a pair of rubber rings 104 into the gap and on both sides of the tube joint part 102,
A water channel 105 is formed on the inner wall surface side of the joint part 102,
This was confirmed by injecting pressurized water through an injection hole 106 communicating with the water channel 105.
ｃ 発明が解決しようとする課題
しかしながら、上述した検査方法は装置自体が
大掛かりとなるばかりでなく、第１０図に示した
FRP層１０７の内側にコンクリート層１０８を
形成し、管体両端部の該両層１０７，１０８間に
透水層１０９を設けた管体１０１においては、透
水層１０９への加圧水の侵入を防止するため合成
樹脂等のパツキン１１０によつてその入口を閉塞
する作業が必要となり、その作業に要する手間、
また検査装置のセツト及び検査後の閉塞部開放に
要する手間等、その実施のための作業性に多くの
課題を有していた。c Problems to be solved by the invention However, the above-mentioned inspection method not only requires a large-scale apparatus, but also
In the pipe body 101 in which a concrete layer 108 is formed inside the FRP layer 107 and a water permeable layer 109 is provided between the layers 107 and 108 at both ends of the pipe body, in order to prevent pressurized water from entering the water permeable layer 109, It is necessary to close the entrance with a gasket 110 made of synthetic resin, etc., and the time and effort required for this work are
In addition, there were many problems in the workability of carrying out the test, such as the time and effort required to set up the test device and open the closed part after the test.
本発明は、上述した従来技術の課題に鑑みなさ
れたものであつて、その目的は、管体継手部の止
水性を簡易な作業にて確認し得る管体継手部の構
造および管体継手部の水密検査方法を提供するこ
とにある。 The present invention has been made in view of the above-mentioned problems of the prior art, and the object thereof is to provide a structure of a pipe joint part that allows the water-stopping property of the pipe joint part to be confirmed with a simple operation, and a structure of the pipe joint part. The purpose of this invention is to provide a watertight inspection method.
ｄ 課題を解決するための手段
本発明は上述した課題を解決するため、その要
旨は、管体の継手部を覆うカラーを設け、管体継
手部の両側にあたる部分に配置した１対の第１の
止水ゴム輪と、該第１の止水ゴム輪の管体継手部
側で、かつ管体継手部の両側にあたる部分に配置
した１対の第２の止水ゴム輪とを共に前記カラー
の内周壁面と管体の外周壁面との間隙内に設け、
上記第２の止水ゴム輪には周方向に連続し止水性
の検査時に加圧水が注入される空洞を備え、上記
第２の止水ゴム輪と上記第１の止水ゴム輪との間
に形成される空隙に加圧水を注入し得るように第
２の止水ゴム輪に注水孔を穿設したことを特徴と
する管体継手部の構造、並びに管体の継手部を覆
うカラーを設け、該カラーの内周壁面と管体の外
周壁面との間隙内で、管体継手部の両側にあたる
部分に１対の第１の止水ゴム輪を設けることによ
り止水した管体における管体継手部の水密検査方
法であつて、上記第１の止水ゴム輪の管体継手部
側で、かつ前記間隙内における管体継手部の両側
にあたる部分に１対の第２の止水ゴム輪を設け、
上記第２の止水ゴム輪には周方向に連続し止水性
の検査時に加圧水が注入される空洞を備え、上記
第２の止水ゴム輪と上記第１の止水ゴム輪との間
に形成される空隙に、該第２の止水ゴム輪に穿設
された注水孔より加圧水を注入することにより止
水性を検査することとした管体継手部の水密検査
方法にある。d Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a collar that covers the joint part of the pipe body, and a pair of first collars arranged on both sides of the joint part of the pipe body. Both the water-stop rubber ring and a pair of second water-stop rubber rings arranged on the pipe joint side of the first water-stop rubber ring and on both sides of the pipe joint are attached to the collar. installed in the gap between the inner circumferential wall surface of the pipe body and the outer circumferential wall surface of the pipe body,
The second water-stopping rubber ring has a circumferentially continuous cavity into which pressurized water is injected during a water-stopping test, and the second water-stopping rubber ring is provided with a cavity between the second water-stopping rubber ring and the first water-stopping rubber ring. A structure of the pipe joint part characterized in that a water injection hole is bored in the second water stop rubber ring so that pressurized water can be injected into the gap formed, and a collar is provided to cover the joint part of the pipe body, A pipe joint in a pipe body in which water is stopped by providing a pair of first water stop rubber rings on both sides of the pipe joint part within the gap between the inner peripheral wall surface of the collar and the outer peripheral wall surface of the pipe body. A watertight inspection method for water-tightness testing, wherein a pair of second water-stop rubber rings are placed on the pipe joint side of the first water-stop rubber ring and on both sides of the pipe joint within the gap. established,
The second water-stopping rubber ring has a circumferentially continuous cavity into which pressurized water is injected during a water-stopping test, and the second water-stopping rubber ring is provided with a cavity between the second water-stopping rubber ring and the first water-stopping rubber ring. The present invention provides a method for watertightness testing of a pipe joint, in which watertightness is tested by injecting pressurized water into the gap formed through a water injection hole drilled in the second watertight rubber ring.
ｅ 実施例
以下、本発明の管体継手部の一実施例を添付図
面に従つて詳細に説明する。e. Embodiment Hereinafter, an embodiment of the pipe joint portion of the present invention will be described in detail with reference to the accompanying drawings.
ここで第１図は管体の斜視図であり、該管体１
はその継手部２の周囲を覆うカラー３が設けられ
ており、該カラー３の内周壁面と管体１の外周壁
面との間隙内であつて、かつ管体継手部２の両側
にあたる部分に１対の第１の止水ゴム輪４，４が
設けられ、該第１の止水ゴム輪４，４の継手部２
側で、かつ継手部２の両側にあたる部分に１対の
第２の止水ゴム輪５，５が設けられている。第２
の止水ゴム輪５，５には、該第２の止水ゴム輪
５，５と上記第１の止水ゴム輪４，４との間に形
成される空隙６，６に加圧水を注入し得るよう、
その側面に複数の注水孔７，７……が穿設されて
いる。 Here, FIG. 1 is a perspective view of the tube body, and the tube body 1 is a perspective view of the tube body 1.
is provided with a collar 3 that covers the periphery of the joint part 2, and is located within the gap between the inner circumferential wall surface of the collar 3 and the outer peripheral wall surface of the tube body 1 and on both sides of the tube body joint part 2. A pair of first water stop rubber rings 4, 4 are provided, and a joint portion 2 of the first water stop rubber rings 4, 4 is provided.
A pair of second water-stop rubber rings 5, 5 are provided on the sides and on both sides of the joint portion 2. Second
Pressurized water is injected into the gaps 6, 6 formed between the second water-stop rubber rings 5, 5 and the first water-stop rubber rings 4, 4. to get it,
A plurality of water injection holes 7, 7... are bored in the side surface thereof.
管体１は、上述の如き構造の継手部により管路
が形成される。 In the tube body 1, a conduit is formed by a joint portion having the structure as described above.
第２図及び第３図は上記管体１の縦断面を示す
ものであつて、第３図の管体１はFRP層８の内
側にコンクリート層９を形成し、管体両端部の該
両層８，９間に透水層１０を形成した管体であ
る。 FIGS. 2 and 3 show longitudinal sections of the tube 1, and the tube 1 in FIG. 3 has a concrete layer 9 formed inside the FRP layer 8, and has a This is a tube in which a water-permeable layer 10 is formed between layers 8 and 9.
上記管体１の継手部２における止水性を検査す
るためには、第４図に示した如く、第２の止水ゴ
ム輪５，５の側面に穿設された注入孔７，７，…
…にパイプ１１を連結し、該第２の止水ゴム輪
５，５と第１の止水ゴム輪４，４との間に形成さ
れる空隙６，６に加圧水を注入することにより行
なう。また、検査後あるいは検査せずに管体１を
管路として使用する場合は、上記第２の止水ゴム
輪５，５の側面に穿設された注入孔７，７，……
に連結したパイプ１１にゴム栓１２等を挿入する
ことにより、パイプ内に汚泥等の侵入を防止でき
る。 In order to test the water-stopping properties of the joint portion 2 of the pipe body 1, as shown in FIG. 4, injection holes 7, 7, . . .
This is done by connecting a pipe 11 to... and injecting pressurized water into the gaps 6, 6 formed between the second water-stop rubber rings 5, 5 and the first water-stop rubber rings 4, 4. In addition, when the tube body 1 is used as a conduit after or without inspection, injection holes 7, 7, .
By inserting a rubber stopper 12 or the like into the pipe 11 connected to the pipe 11, it is possible to prevent sludge and the like from entering the pipe.
つぎに、本発明にかかる管体継手部の水密検査
方法を説明する。 Next, a watertight inspection method for a pipe joint according to the present invention will be explained.
まず、第６図に示す如き構造の検査体である管
体１においては、その継手部２から注水孔７，
７，……が穿設された１対の第２の止水ゴム輪
５，５を管体１の外周壁面とカラー３の内周壁面
との間隙内に挿入する。但し、上述した本発明に
かかる管体継手部の構造を有する管体１において
は、この作業は不要となる。 First, in a pipe body 1 which is an inspection body having a structure as shown in FIG.
A pair of second water-stop rubber rings 5, 5 having holes 7, . However, in the tube body 1 having the structure of the tube joint portion according to the present invention described above, this operation is not necessary.
つぎに、注水孔７，７，……に加圧水を導入す
るためのパイプ１１を連結し、該第２の止水ゴム
輪５，５と止水ゴム輪４，４との間に形成される
空隙６，６に加圧水を注入する（第７図の状態）。 Next, a pipe 11 for introducing pressurized water is connected to the water injection holes 7, 7, . Pressurized water is injected into the gaps 6, 6 (state shown in FIG. 7).
加圧水注入後、一定時間その圧力を保持し、止
水ゴム輪４，４の間隙等から漏水が認められるか
否かを目視検査あるいは圧力ゲージの低下によつ
て確認する。 After pressurized water is injected, the pressure is maintained for a certain period of time, and whether or not water leaks from the gap between the water-stop rubber rings 4, 4, etc. is confirmed by visual inspection or by a drop in the pressure gauge.
なお、第８図に示した如く、第２の止水ゴム輪
５，５には周方向に連続した空洞１３，１３を設
け、該空洞１３，１３にもパイプ１１（他のより
高圧の加圧水を導入するパイプに接続してもよ
い）より加圧水を注入するように構成すると、そ
の圧力により第２の止水ゴム輪５，５が膨張し、
より強固に第２の止水ゴム輪５，５がカラーの内
周壁面と管体１の外周壁面との間隙内に固定さ
れ、高い圧力の加圧水を空隙６，６に注入するこ
とが可能となり、より高い止水性の検査ができ
る。例えば、実験では、第４図に示した構造の第
２の止水ゴム輪では、加圧水の圧力が10Kgｆ／cm2
程度までであつたのに対し、第８図の構造の第２
の止水ゴム輪では、15Kgｆ／cm2の加圧水による試
験が可能であつた。 As shown in FIG. 8, the second water stop rubber rings 5, 5 are provided with cavities 13, 13 that are continuous in the circumferential direction, and the cavities 13, 13 are also provided with pipes 11 (other high-pressure pressurized water). When pressurized water is injected from the pipe (which may be connected to a pipe introducing water), the second water stop rubber rings 5, 5 expand due to the pressure.
The second water stop rubber rings 5, 5 are more firmly fixed in the gap between the inner peripheral wall surface of the collar and the outer peripheral wall surface of the tube body 1, making it possible to inject high pressure water into the gaps 6, 6. , it is possible to test higher water resistance. For example, in an experiment, the pressure of pressurized water was 10 kgf/cm 2 in the second water-stop rubber ring with the structure shown in Figure 4.
On the other hand, the second part of the structure in Figure 8
With the water-stop rubber ring, it was possible to test with pressurized water of 15 kgf/cm 2 .
ｆ 発明の効果
以上、既述した如く、本発明における管体継手
部の構造は、継手部の止水のために設けられた１
対の第１の止水ゴム輪の他に、注水孔が穿設され
た１対の第２の止水ゴム輪を前記第１の止水ゴム
輪の管体継手部側で、かつ管体継手部の両側にあ
たる部分に設けたため、かかる継手部の止水性を
検査する場合、上記注水孔に加圧水を導入するた
めのパイプを連結する作業のみで行なうことがで
き、水密検査の作業性を向上させることができ
る。f. Effects of the Invention As mentioned above, the structure of the pipe joint part of the present invention is such that the pipe body joint part of the present invention has a
In addition to the pair of first water-stopping rubber rings, a pair of second water-stopping rubber rings having water injection holes are installed on the pipe body joint part side of the first water-stopping rubber rings, and Since it is installed on both sides of the joint, when testing the watertightness of such a joint, all you have to do is connect the pipe for introducing pressurized water into the water injection hole, improving the workability of watertightness inspections. can be done.
また、本発明における管体継手部の水密検査方
法は、上述の如く、継手部の止水のために設けら
れた１対の止水ゴム輪の管体継手部側で、かつ管
体継手部の両側にあたる部分に１対の第２の止水
ゴム輪を設け、該第２の止水ゴム輪と上記止水ゴ
ム輪との間に形成される空隙に、第２の止水ゴム
輪に穿設された注水孔より加圧水を注入すること
により止水性を検査することとしたため、従来の
テストバンド方式の水密検査方法と異なり、その
作業が簡易で、しかも少ない水量で正確に管体継
手部の止水性が確認でき、また、管端面に透水層
を有する管体であつても、その透水層の閉塞及び
開放等の作業が不要となり、経済的である。 Further, as described above, the method for watertightness inspection of a pipe joint in the present invention is to inspect the pipe joint on the pipe joint part side of a pair of water-stopping rubber rings provided to stop water in the joint. A pair of second water-stop rubber rings are provided on both sides of the water-stop rubber ring, and a pair of second water-stop rubber rings are provided in the gap formed between the second water-stop rubber ring and the water-stop rubber ring. We decided to test the watertightness by injecting pressurized water through a drilled water injection hole, which is different from the conventional test band method for watertightness testing, which simplifies the process and allows accurate inspection of pipe joints with a small amount of water. The water-stopping properties of the pipe can be confirmed, and even if the pipe body has a water-permeable layer on the end surface of the pipe, there is no need to close or open the water-permeable layer, which is economical.
さらに、本発明は、１対の第１の止水ゴム輪
と、１対の第２の止水ゴム輪とを共にカラーの内
周壁面と管体の外周壁面との間隙内に設けること
により、カラーの端面に当接させて止水ゴム輪を
設けるのに比較して、止水ゴム輪をカラーの端面
へ押さえ付けるための部材等が不要になるので、
必要部品数が減少して、構造が簡単になり、、第
２の止水ゴム輪には周方向に連続し止水性の検査
時に加圧水が注入される空洞を備えることによ
り、該加圧水の圧力によつて、第２の止水ゴム輪
が膨張し、該第２の止水ゴム輪がより強固にカラ
ーの内周壁面と管体の外周壁面との間隙内に固定
され、高い圧力の加圧水を空隙内に注入すること
が可能となり、より高い止水性の検査をすること
ができるという優れた効果を奏する。 Furthermore, the present invention provides a pair of first water-stopping rubber rings and a pair of second water-stopping rubber rings in the gap between the inner circumferential wall surface of the collar and the outer circumferential wall surface of the pipe body. Compared to providing a water stop rubber ring in contact with the end surface of the collar, there is no need for a member to press the water stop rubber ring against the end surface of the collar.
The number of required parts is reduced, the structure is simplified, and the second water-stopping rubber ring is provided with a circumferentially continuous cavity into which pressurized water is injected during water-stopping tests. Therefore, the second water-stopping rubber ring expands, and the second water-stopping rubber ring is more firmly fixed in the gap between the inner circumferential wall of the collar and the outer circumferential wall of the pipe body, allowing high-pressure pressurized water to flow through the second water-stopping rubber ring. It has the excellent effect of being able to be injected into the void, allowing for higher water-stopping tests.
第１図〜第５図は本発明にかかる管体継手部構
造を示すものであつて、第１図は管体の斜視図、
第２図及び第３図は管体の要部縦断面図である。
第４図は水密検査を実施している状態を示す管体
の要部縦断面図、第５図は管路として使用してい
る状態を示す管体の要部縦断面図である。第６図
〜第８図は本発明にかかる管体継手部の水密検査
方法を示すものであつて、第６図は管体の斜視
図、第７図は検査装置を装着した管体の斜視図で
ある。第８図は管体の要部縦断面図である。第９
図及び第１０図は従来の管体継手部の構造及び水
密検査方法を示す管体の要部縦断面図である。
１……管体、２……継手部、３……カラー、４
……第１の止水ゴム輪、５……第２の止水ゴム
輪、６……空隙、７……注水孔、８……FRP層、
９……コンクリート層、１０……透水層、１１…
…パイプ、１２……ゴム栓、１３……空洞。
1 to 5 show the structure of the pipe joint according to the present invention, in which FIG. 1 is a perspective view of the pipe body;
FIGS. 2 and 3 are longitudinal sectional views of main parts of the tube.
FIG. 4 is a vertical cross-sectional view of the main part of the pipe body showing a state in which a watertight inspection is being carried out, and FIG. 5 is a longitudinal cross-sectional view of the main part of the pipe body showing a state in which it is used as a conduit. Figures 6 to 8 show the watertightness inspection method for a pipe joint according to the present invention, in which Figure 6 is a perspective view of the pipe, and Figure 7 is a perspective view of the pipe fitted with an inspection device. It is a diagram. FIG. 8 is a longitudinal sectional view of the main part of the tube. 9th
1 and 10 are longitudinal cross-sectional views of main parts of a pipe body showing the structure and watertightness inspection method of a conventional pipe joint part. 1... Pipe body, 2... Joint part, 3... Collar, 4
...First water stop rubber ring, 5...Second water stop rubber ring, 6...Void, 7...Water injection hole, 8...FRP layer,
9... Concrete layer, 10... Permeable layer, 11...
...Pipe, 12...Rubber stopper, 13...Cavity.
Claims (1)
部の両側にあたる部分に配置した１対の第１の止
水ゴム輪と、該第１の止水ゴム輪の管体継手部側
で、かつ管体継手部の両側にあたる部分に配置し
た１対の第２の止水ゴム輪とを共に前記カラーの
内周壁面と管体の外周壁面との間隙内に設け、上
記第２の止水ゴム輪には周方向に連続し止水性の
検査時に加圧水が注入される空洞を備え、上記第
２の止水ゴム輪と上記第１の止水ゴム輪との間に
形成される空隙に加圧水を注入し得るように第２
の止水ゴム輪に注水孔を穿設したことを特徴とす
る管体継手部の構造。 ２ 管体の継手部を覆うカラーを設け、該カラー
の内周壁面と管体の外周壁面との間隙内で、管体
継手部の両側にあたる部分に１対の第１の止水ゴ
ム輪を設けるとこにより止水した管体における管
体継手部の水密検査方法であつて、上記第１の止
水ゴム輪の管体継手部側で、かつ前記間隙内にお
ける管体継手部の両側にあたる部分に１対の第２
の止水ゴム輪を設け、上記第２の止水ゴム輪には
周方向に連続し止水性の検査時に加圧水が注入さ
れる空洞を備え、上記第２の止水ゴム輪と上記第
１の止水ゴム輪との間に形成される空隙に、該第
２の止水ゴム輪に穿設された注水孔より加圧水を
注入することにより止水性を検査することとした
管体継手部の水密検査方法。[Scope of Claims] 1. A collar is provided to cover the joint of the pipe, and a pair of first water-stop rubber rings are arranged on both sides of the pipe-joint. A pair of second water-stop rubber rings arranged on the pipe joint part side and on both sides of the pipe joint part are both provided in the gap between the inner circumferential wall surface of the collar and the outer circumferential wall surface of the pipe body. , the second water-stopping rubber ring is provided with a circumferentially continuous cavity into which pressurized water is injected during a water-stopping test, and the second water-stopping rubber ring is between the second water-stopping rubber ring and the first water-stopping rubber ring. The second
A pipe joint structure characterized by having a water injection hole drilled in the water-stop rubber ring. 2. A collar is provided to cover the joint of the pipe, and a pair of first water-stop rubber rings are installed on both sides of the joint within the gap between the inner peripheral wall of the collar and the outer peripheral wall of the pipe. A watertight inspection method for a pipe joint in a pipe whose water has been stopped by providing a watertight rubber ring on the pipe joint part side of the first water stop rubber ring and on both sides of the pipe joint within the gap. a pair of second
A water-stopping rubber ring is provided, and the second water-stopping rubber ring has a circumferentially continuous cavity into which pressurized water is injected during a water-stopping test, and the second water-stopping rubber ring and the first water-stopping rubber ring are The watertightness of a pipe joint was tested by injecting pressurized water into the gap formed between the second water-stopping rubber ring and the water-stopping rubber ring through a water injection hole drilled in the second water-stopping rubber ring. Inspection method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10960288A JPH01280234A (en) | 1988-05-02 | 1988-05-02 | Structure of tube body joint part and watertightness inspecting method for tube body joint part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10960288A JPH01280234A (en) | 1988-05-02 | 1988-05-02 | Structure of tube body joint part and watertightness inspecting method for tube body joint part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01280234A JPH01280234A (en) | 1989-11-10 |
| JPH0517494B2 true JPH0517494B2 (en) | 1993-03-09 |
Family
ID=14514441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10960288A Granted JPH01280234A (en) | 1988-05-02 | 1988-05-02 | Structure of tube body joint part and watertightness inspecting method for tube body joint part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01280234A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0282129A (en) * | 1988-09-19 | 1990-03-22 | Nippon Pressed Concrete Co Ltd | Method and device for hydraulic test of box culvert flexible joint |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5384122U (en) * | 1977-09-01 | 1978-07-12 | ||
| JPS6098034U (en) * | 1983-12-08 | 1985-07-04 | 株式会社クボタ | Joint leak test device on the outside of the pipe |
-
1988
- 1988-05-02 JP JP10960288A patent/JPH01280234A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01280234A (en) | 1989-11-10 |
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