JP2001272300A - Water pressure test device for medium and small diameter pipes - Google Patents
Water pressure test device for medium and small diameter pipesInfo
- Publication number
- JP2001272300A JP2001272300A JP2000296249A JP2000296249A JP2001272300A JP 2001272300 A JP2001272300 A JP 2001272300A JP 2000296249 A JP2000296249 A JP 2000296249A JP 2000296249 A JP2000296249 A JP 2000296249A JP 2001272300 A JP2001272300 A JP 2001272300A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- cylindrical
- main body
- cylindrical main
- inspected
- 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.)
- Granted
Links
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、地中に埋設する
鋳鉄管などの管の継手部を埋め戻す前に水密性能を検査
する中小口径管用水圧試験器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic tester for small and medium diameter pipes for inspecting watertightness before refilling a joint portion of a pipe such as a cast iron pipe buried underground.
【０００２】[0002]
【従来の技術】従来より、管の中に人が入ることができ
る（口径８００ｍｍ以上）管の接合では、接合作業後、
各継手部位置にテストバンドと称する水圧試験器を用い
て管内に人が入り、当該バンドを管内面で人力にて押し
広げ密着することにより、水圧試験を行ない、接合の不
具合による漏水の発見に行なってきた。また、管内に人
が入れない口径７００ｍｍ以下の場合では、現実にはそ
の都度接合毎に水圧試験器を管内に挿入して水圧試験を
行なうことが出来ないため、全長配管後、通水して継手
部の漏水試験を行なっている。したがって、もし漏水が
生じてている場合、漏水箇所が継手部のどの位置なのか
を確認することが出来ない。このため、漏水が激しい場
合、再度掘り返して継手部を外し再び接合しなければな
らない。テストバンドを該当する管の継手部にてセット
するのに、管内に人が入り、締結ボルトを締め付ける必
要があるので、適用口径は８００ｍｍ以上の場合でしか
使用できない。従って、口径７００ｍｍ以下のケースで
は、継手部の作業の良否はある系統の配管作業が完了し
た時点で通水検査を行ない判断してきたが、通水検査を
実施するまでは、管の埋め戻しができず、また通水検査
前に管の埋め戻しが必要な場合、通水検査で漏水があっ
た場合、漏水箇所を特定するためには、掘り返して確認
しなければならない。2. Description of the Related Art Conventionally, in joining a pipe (having a diameter of 800 mm or more) that allows a person to enter the pipe, after joining,
A person enters the pipe using a hydraulic tester called a test band at each joint position, and the band is pushed by human power on the inner surface of the pipe and adheres tightly to perform a water pressure test to find leakage due to joint failure. I've been going. In addition, in the case where the diameter is 700 mm or less that does not allow a person to enter the pipe, it is actually impossible to insert a hydraulic pressure tester into the pipe and perform a water pressure test each time the pipe is joined. We conduct a water leakage test of the joint. Therefore, if water is leaking, it is not possible to confirm which position of the joint is at the leak location. For this reason, when water leakage is severe, it must be dug again to remove the joint portion and join again. In order to set the test band at the joint of the corresponding pipe, it is necessary to insert a person into the pipe and tighten the fastening bolt, so that it can be used only when the applicable diameter is 800 mm or more. Therefore, in the case of a diameter of 700 mm or less, whether the work of the joint portion is good or bad has been determined by performing a water flow inspection when the piping work of a certain system is completed. If it is not possible and the pipes need to be backfilled before the water flow inspection, or if there is a leak at the water flow inspection, it must be dug up to identify the leak location.
【０００３】[0003]
【発明が解決しようとする課題】この発明は、管内に人
が入れない口径７００ｍｍ以下の場合に継手部の良否を
判定することができる水圧試験器を提供することを目的
とするものである。SUMMARY OF THE INVENTION It is an object of the present invention to provide a hydraulic tester capable of judging the quality of a joint portion when the bore is 700 mm or less where no person can enter the pipe.
【０００４】[0004]
【課題を解決するための手段】上記の課題を解決するた
め、この発明の中小口径管用水圧試験器は、鋳鉄管など
の被検査管９と前記と同様の被検査管９とを水密ゴム９
ｄを介装して接続する継手部９ａの水密性能を検査する
水圧試験器であって、該水圧試験器は円筒状本体２と、
円筒状本体２に設けた移動用の車輪４、５と、円筒状本
体２の長手方向外周に所定の間隔を存して配設した膨張
・収縮可能なチューブリング８、８と、該チューブリン
グに連通する開口部２ｃ、２ｃに接続したチューブリン
グ内注入管１０と、円筒状本体２の長手方向中間に形成
した開口部２ｄ、２ｅにそれぞれ接続したチューブリン
グ間注入管１１およびチューブリング間排気管１２と、
円筒状本体２の後方側の側板３に連結した継ぎ足し可能
な移動用竿１４と、からなることである。In order to solve the above-mentioned problems, a hydraulic tester for small and medium-diameter pipes according to the present invention comprises a test pipe 9 such as a cast iron pipe and a test pipe 9 similar to the above described.
a hydraulic tester for inspecting the watertightness of a joint portion 9a to be connected by interposing d, the hydraulic tester comprising: a cylindrical main body 2;
Moving wheels 4, 5 provided on the cylindrical body 2, inflatable / contractible tube rings 8, 8 arranged at predetermined intervals on the outer periphery in the longitudinal direction of the cylindrical body 2, and the tube rings In the tube ring connected to the openings 2c and 2c communicating with the tube, and the tube-to-tube injection tube 11 and the exhaust between the tube rings connected to the openings 2d and 2e formed in the middle of the cylindrical body 2 in the longitudinal direction. Tube 12;
And a movable rod 14 connected to the side plate 3 on the rear side of the cylindrical main body 2.
【０００５】[0005]
【発明の実施の形態】この発明の中小口径管用水圧試験
器は、鋳鉄管などの被検査管９の受け口９ｂと前記と同
様の被検査管９の挿し口９ｃとを水密ゴム９ｄを介装し
て接続する継手部９ａの水密性能を検査する水圧試験器
であって、該水圧試験器は円筒状本体２と、円筒状本体
２に設けた移動用の車輪４、５と、円筒状本体２の長手
方向外周に所定の間隔を存して配設した膨張・収縮可能
なチューブリング８、８と、該チューブリングに連通す
る開口部２ｃ、２ｃに接続したチューブリング内注入管
１０と、円筒状本体２の長手方向中間に形成した開口部
２ｄ、２ｅにそれぞれ接続したチューブリング間注入管
１１およびチューブリング間排気管１２と、円筒状本体
２の後方側の側板３に連結した継ぎ足し可能な移動用竿
１４と、から構成される。そして、これによって、中小
口径７００ｍｍ以下の場合において、通水検査前に継手
部の水密性能検査結果の良否を確認することができる。
また、そのことにより、接合部（継手部）の検査が完了
した管を、直ちに埋め戻しすることができ、配管現場作
業エリアを縮小することができる。さらに、通水試験に
おいて、接合部での漏水の心配がないため、場合によっ
ては、通水試験を省略することができる。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the hydraulic tester for small and medium diameter pipes of the present invention, a watertight rubber 9d is provided between a receiving port 9b of a pipe 9 to be inspected such as a cast iron pipe and an insertion port 9c of the same pipe 9 to be inspected. A hydraulic tester for inspecting the watertightness of a joint portion 9a to be connected by means of a cylindrical main body, moving wheels 4 and 5 provided on the cylindrical main body 2, and a cylindrical main body. An inflatable / contractible tube ring 8, 8 arranged at a predetermined interval on the outer circumference in the longitudinal direction of 2, and an injection tube 10 in the tube ring connected to the openings 2c, 2c communicating with the tube ring; Injection pipe 11 between tube rings and exhaust pipe 12 between tube rings connected to openings 2d and 2e formed in the middle of the cylindrical body 2 in the longitudinal direction, and a refillable part connected to the side plate 3 on the rear side of the cylindrical body 2 Composed of a moving rod 14 It is. Thus, in the case of a small or medium diameter of 700 mm or less, it is possible to confirm the quality of the result of the water tightness test of the joint before the water flow test.
In addition, by this, the pipe for which the inspection of the joint (joint part) has been completed can be immediately backfilled, and the work area of the piping site can be reduced. Furthermore, in the water flow test, since there is no risk of water leakage at the joint, the water flow test can be omitted in some cases.
【０００６】請求項２に係る発明は、円筒状本体２の長
手方向の外周に嵌装固定した補強部２２と膨張・収縮可
能な非補強部２３とからなる外部ホース２０を嵌装固定
したものである。請求項３に係る発明は、円筒状本体２
の長手方向の外周に所定の間隔を存して配設した膨張・
収縮可能な円筒状ゴム３０、３０を嵌装固定したもので
ある。According to the second aspect of the present invention, an external hose 20 comprising a reinforcing portion 22 fitted and fixed on the outer periphery in the longitudinal direction of the cylindrical main body 2 and a non-reinforcing portion 23 which can be expanded and contracted is fitted and fixed. It is. The invention according to claim 3 is a cylindrical body 2
Inflated and arranged at predetermined intervals on the outer circumference in the longitudinal direction of
The shrinkable cylindrical rubber 30, 30 is fitted and fixed.
【０００７】請求項４に係る発明は、鋳鉄管などの被検
査管９と前記と同様の被検査管９とを水密ゴム９ｄを介
装して接続する継手部９ａの水密性能を検査する水圧試
験器であって、該水圧試験器は、所定の間隔で対向状に
配設した側壁４１,４１を有する短円筒状本体４０,４０
と、前記短円筒状本体の間隔を保持する可撓性を有する
間隔保持材４２と、前記短円筒状本体に設けた移動用の
車輪４、５と、前記両短円筒状本体間に掛け渡し、両端
部を該両短円筒状本体の外周に嵌装固定した補強部２２
と膨張・収縮可能な非補強部２３とからなる外部ホース
２０と、前記側壁と外部ホース２０とで形成する空間部
４３に注水する注入管１０と、外部ホース２０の長手方
向中間の補強部２２に形成した開口部２０ａ、２０ｂに
それぞれ接続した非補強部間注入管１１および非補強部
間排気管１２と、前記後方側の短円筒状本体４０の側壁
４１に連結した継ぎ足し可能な移動用竿１４とからなる
ことである。According to a fourth aspect of the present invention, there is provided a hydraulic pressure tester for inspecting the watertightness of a joint portion 9a for connecting a pipe 9 to be inspected such as a cast iron pipe and the same pipe 9 to be inspected as described above with a watertight rubber 9d interposed therebetween. A test device, wherein the hydraulic test device has a short cylindrical body 40, 40 having side walls 41, 41 disposed opposite to each other at a predetermined interval.
And a spacing member 42 having flexibility for maintaining an interval between the short cylindrical bodies, a moving wheel 4, 5 provided on the short cylindrical bodies, and a bridge between the two short cylindrical bodies. A reinforcing portion 22 having both ends fitted and fixed to the outer periphery of the two short cylindrical bodies.
And an inflatable and contractible non-reinforcing portion 23, an injection pipe 10 for injecting water into a space 43 formed by the side wall and the external hose 20, and a reinforcing portion 22 in the middle of the external hose 20 in the longitudinal direction. Non-reinforcement part injection pipe 11 and non-reinforcement part exhaust pipe 12 respectively connected to the openings 20a and 20b formed at the bottom, and an extendable moving rod connected to the side wall 41 of the short cylindrical body 40 on the rear side. 14.
【０００８】[0008]
【実施例】この発明の一実施例について、図面を参照し
て説明する。図１〜図５および図１０において、１は水
圧試験器で、水圧試験器１は円筒状本体２と、円筒状本
体２の両端に設けた側板３と、側板３から突設したブラ
ケット６、７に設けた車輪４、５とからなり、後述する
被検査管内を軸線方向に進退自在となっている。円筒状
本体２の長手方向に所定の間隔を設けて肉厚部２ａ、２
ａが形成され、肉厚部２ａ、２ａに凹周溝２ｂ、２ｂが
形成される。肉厚部２ａ、２ａに凹周溝２ｂ、２ｂに通
じる開口部２ｃ、２ｃを少なくとも円周上に１ヵ所形成
され、さらに円筒状本体２の長手方向中間の下部に開口
部２ｄが、上部に開口部２ｅが形成される。開口部２
ｃ、２ｃにはチューブリング内注入管１０が分岐注入管
１０ａ、１０ｂを介して接続され、開口部２ｄ、２ｅに
はそれぞれチューブリング間注入管１１およびチューブ
リング間排気管１２が接続される。また、注入管１０、
１１および排気管１２にはそれぞれホース１５、１６お
よびホース１７が接続され、さらに各ホースの後端側に
はバルブ１５ａ、１６ａおよび１７ａが接続される。８
は凹周溝２ｂ内に収縮状態で収納されたチューブリング
で、ゴム、ナイロン製などのド−ナツ状の環状体からな
る。チューブリング８の注入口８ａを開口部２ｃと対向
させ、フランジ部８ｂを取付フランジ部８ｃ上に着座さ
せて押え板８ｄ、ビス８ｅを介して円筒状本体２に固定
する。８ｆは水密用Ｏリングである。An embodiment of the present invention will be described with reference to the drawings. 1 to 5 and 10, reference numeral 1 denotes a hydraulic tester. The hydraulic tester 1 includes a cylindrical main body 2, side plates 3 provided at both ends of the cylindrical main body 2, a bracket 6 protruding from the side plate 3, The wheel comprises wheels 4 and 5 provided on a tube 7 and is movable in an axial direction in a tube to be inspected which will be described later. Thick portions 2a, 2a are provided at predetermined intervals in the longitudinal direction of cylindrical body 2.
a is formed, and concave circumferential grooves 2b, 2b are formed in the thick portions 2a, 2a. Openings 2c, 2c communicating with the concave circumferential grooves 2b, 2b are formed at least at one location on the circumference of the thick portions 2a, 2a. An opening 2e is formed. Opening 2
The in-tube injection tube 10 is connected to c and 2c via branch injection tubes 10a and 10b, and the inter-tube injection tube 11 and the inter-tube exhaust tube 12 are connected to the openings 2d and 2e, respectively. Also, the injection tube 10,
Hose 15, 16 and hose 17 are connected to 11 and exhaust pipe 12, respectively, and valves 15a, 16a and 17a are connected to the rear end side of each hose. 8
Is a tube ring housed in a contracted state in the concave circumferential groove 2b, and is formed of a toroidal annular body made of rubber, nylon or the like. The injection port 8a of the tube ring 8 faces the opening 2c, the flange 8b is seated on the mounting flange 8c, and is fixed to the cylindrical main body 2 via the holding plate 8d and the screw 8e. 8f is a watertight O-ring.
【０００９】９は鋳鉄管などの被検査管で、前方側の被
検査管９と後方側の被検査管９は継手部９ａにより接続
（接合）される。継手部９ａは前方側の被検査管９の受
け口９ｂに後方側の被検査管９の挿し口９ｃを水密ゴム
９ｄを介装して接続し、水密ゴム９ｄを押輪９ｅ、ボル
ト・ナット９ｆにより押し付けることにより構成され、
継手部９ａの水密を保持する。前記した継手部９ａは一
例にすぎず、水密ゴムを採用する形式のものであればど
んな継手部でもよい。１４は後方側の側板３から突設し
た竿取付部１３に連結した継ぎ足し可能な定尺の移動用
竿で、竿取付部１３のめねじ部１３ａに移動用竿１４の
おねじ部１４ａを螺合し、順次移動用竿１４のめねじ部
１４ｂに移動用竿１４のおねじ部１４ａを螺合して連結
するようになっている。この場合の移動用竿１４の継ぎ
足し数は、鋳鉄管の場合、中小口径管で定尺５〜６ｍで
あることから、定尺竿１４の長さを１．０〜１．５ｍと
すれば複数本継ぎ足せばよいことになる。なお、被検査
管９を複数本接続した後、２ヵ所乃至３ヵ所の継手部９
ａを検査することもできる。その場合は移動用竿１４の
継ぎ足し数を多くすればよい。Reference numeral 9 denotes a pipe to be inspected such as a cast iron pipe. The pipe 9 to be inspected on the front side and the pipe 9 to be inspected on the rear side are connected (joined) by a joint 9a. The joint 9a is connected to the receiving port 9b of the tube 9 to be inspected on the front side by inserting the insertion port 9c of the tube 9 to be inspected on the rear side with the watertight rubber 9d interposed therebetween, and the watertight rubber 9d is connected to the pressing ring 9e and the bolt / nut 9f. It is composed by pressing
The joint 9a is kept watertight. The above-mentioned joint portion 9a is merely an example, and any joint portion may be used as long as the joint portion employs watertight rubber. Reference numeral 14 denotes a releasable fixed-length moving rod connected to a rod mounting portion 13 protruding from the rear side plate 3, and an external thread portion 14 a of the moving rod 14 is screwed into a female thread portion 13 a of the rod mounting portion 13. Then, the external thread portion 14a of the moving rod 14 is sequentially screwed and connected to the female thread portion 14b of the moving rod 14. In this case, the number of additions of the moving rod 14 is 5 to 6 m in the case of a cast iron pipe with a medium and small diameter pipe. It is only necessary to add this. After connecting a plurality of tubes 9 to be inspected, two or three joint portions 9 are connected.
a can also be tested. In that case, the number of extension of the moving rod 14 may be increased.
【００１０】次に実施例の作用を説明する。前方側の被
検査管９と後方側の被検査管９とを継手部９ａにより接
合した状態で、受け口９ｂと挿し口９ｃの間に介装した
水密ゴム９ｄによる接合状態を検査するに当たり、水圧
試験器１を前方側の被検査管９と後方側の被検査管９の
継手部９ａに位置させる。すなわち、後方側の被検査管
９の挿し口９ｃ（図示省略）から水圧試験器１を該被検
査管９内に挿入するのであるが、円筒状本体２を竿取付
部１３に定尺の移動用竿１４を順次螺合連結しながら押
し込んでいく。この例では竿取付部１３のめねじ部１３
ａに移動用竿１４のおねじ部１４ａを螺合し、順次移動
用竿１４のめねじ部１４ｂに移動用竿１４のおねじ部１
４ａを螺合して連結することにより、円筒状本体２は中
の方に入り込む。継ぎ足し可能な移動用竿１４を使用
し、所定本数継ぎ足すことで、簡単容易にチューブリン
グ８間が継手部（検査箇所）９ａの位置に正しくセット
されることになる。円筒状本体２は被検査管９内を車輪
４、５により移動するから、移動用竿１４による移動が
容易である。チューブリング８内に注水してチューブリ
ング８を膨張させ、被検査管９の内周面に圧着させる。
チューブリング内注入管１０から分岐管１０ａ、１０ｂ
を介して開口部２ｃ、２ｃ、開口部８ａを経てチューブ
リング８内に注水すると、チューブリング８が膨張し、
被検査管９の内周面に圧着する。これにより、継手部９
ａを含むチューブリング間が密閉された空間となる。チ
ューブリング８内が規定の水圧になると、注入管１０に
後続するホース１５に設けたバルブ１５ａを閉じてその
水圧を保持する。チューブリング８間の密閉空間にチュ
ーブリング間注入管１１から開口部２ｄを経て注水す
る。このとき、前記密閉空間に残存する空気は前記注水
に伴って開口部２ｅからチューブリング間排気管１２を
経て排気される。空気が前記空間から排出されると、チ
ューブリング間排気管１２に後続するホース１７に設け
たバルブ１７ａを閉め、密閉空間内を規定の水圧になる
まで上昇させ、規定の水圧になると、チューブリング間
注入管１１に後続するホース１６に設けたバルブ１６ａ
を閉めて水圧検査を行なう（図５参照）。この場合の水
圧検査は、前記のようにチューブリング間排気管１２側
のバルブ１７ａを閉じ、さらにチューブリング間注水管
１１側のバルブ１６ａを閉じた状態で一定時間維持し、
この間の水圧の変化を視て継手部９ａの水密ゴム９ｄの
間からの漏水状態を確認するのである。水圧検査が終る
と、継手部９ａのチューブリング間注入管１１側のバル
ブ１６ａを開放して密閉空間内の水を排水し、さらにチ
ューブリング８内の水を、バルブ１５ａを開放して排水
して収縮させた後、移動用竿１４を引き戻して、水圧試
験器１を引き出し回収し、一連の水圧検査を完了する。Next, the operation of the embodiment will be described. In a state where the pipe 9 to be inspected on the front side and the pipe 9 to be inspected on the rear side are joined by the joint portion 9a, when inspecting the joint state by the watertight rubber 9d interposed between the receiving port 9b and the insertion port 9c, water pressure is used. The tester 1 is positioned at the joint 9a between the front tube 9 to be inspected and the rear tube 9 to be inspected. That is, the hydraulic pressure tester 1 is inserted into the test pipe 9 from the insertion port 9c (not shown) of the test pipe 9 on the rear side. The rods 14 are pushed in while being sequentially screwed and connected. In this example, the female screw portion 13 of the rod mounting portion 13
a of the external thread portion 14a of the moving rod 14 is screwed into the female thread portion 14b of the moving rod 14 sequentially.
By screwing and connecting 4a, the cylindrical main body 2 enters the middle. By using a movable rod 14 that can be extended and extended by a predetermined number, the space between the tube rings 8 can be easily and correctly set at the position of the joint (inspection location) 9a. Since the cylindrical main body 2 moves in the tube 9 to be inspected by the wheels 4 and 5, the movement by the moving rod 14 is easy. Water is injected into the tube ring 8 so that the tube ring 8 expands and is pressed against the inner peripheral surface of the tube 9 to be inspected.
From the injection tube 10 in the tube ring to the branch tubes 10a, 10b
When water is injected into the tube ring 8 through the openings 2c, 2c and the opening 8a through the, the tube ring 8 expands,
Crimping is performed on the inner peripheral surface of the tube 9 to be inspected. Thereby, the joint 9
The space between the tube rings including a is a sealed space. When the inside of the tube ring 8 reaches a specified water pressure, the valve 15a provided on the hose 15 following the injection pipe 10 is closed to maintain the water pressure. Water is injected into the closed space between the tube rings 8 from the inter-tube ring injection pipe 11 through the opening 2d. At this time, the air remaining in the closed space is exhausted from the opening 2e through the inter-tube ring exhaust pipe 12 with the water injection. When the air is exhausted from the space, the valve 17a provided in the hose 17 following the inter-tube ring exhaust pipe 12 is closed, and the inside of the sealed space is raised to a specified water pressure. A valve 16a provided on a hose 16 following the intervening injection pipe 11
And a water pressure test is performed (see FIG. 5). In this case, the water pressure test is performed for a certain period of time with the valve 17a on the exhaust pipe 12 between the tube rings closed and the valve 16a on the water pipe 11 between the tube rings closed as described above.
The state of water leakage from between the watertight rubber 9d of the joint portion 9a is confirmed by observing the change in the water pressure during this time. When the water pressure test is completed, the valve 16a of the joint portion 9a on the side of the injection pipe 11 between the tube rings is opened to drain the water in the sealed space, and the water in the tube ring 8 is drained by opening the valve 15a. Then, the moving rod 14 is pulled back, the hydraulic tester 1 is pulled out and collected, and a series of hydraulic test is completed.
【００１１】水圧試験器１は、前記実施例の他に下記の
構造のものも採用することができる。図６のように、円
筒状本体２の外周に筒状のゴム製外部ホース２０を嵌装
する。外部ホース２０は、長手方向の両端部とほぼ中央
部にあらかじめ部分的に布製の補強材２１を埋設した
（図示の例では３ヵ所）補強部２２と、前記中央の補強
部２２の両側に形成した補強材２１を入れない非補強部
２３とからなり、外部ホース２０の両端部の補強部２２
を鋼製バンド２７で円筒状本体２に縛着させた構造であ
る。なお、２４は非補強部２３の外周に突出させた２条
の外部ホース突条部で圧着効果を高める。２５は円筒状
本体２の両端外周に外嵌固定したリングで、このリング
は外部ホース２０の円筒状本体２への嵌め込みを容易に
するためである。２６はリング２５の外周に形成したリ
ング突条部で、水密性を高めるものである。したがっ
て、外部ホース２０の非補強部２３内へ注入管１０から
注水すると、中央の補強部２２は膨張することなく非補
強部２３のみが膨張して被検査管９の内側に密着し、非
補強部２３間に密閉空間を形成するものである。その
後、非補強部２３間の密閉空間に非補強部間注入管１１
から注水する。このとき、前記密閉空間に残存する空気
は前記注水に伴って非補強部間排気管１２を経て排気さ
れる。以後前記の実施例のようにして密閉空間内を規定
の水圧になるまで上昇させ、所定の水圧を保持した状態
で、水圧検査を行なう。また、図７のように、チューブ
リング８の代わりに円筒状本体２の外周に所定の間隔を
存して円筒状ゴム３０、３０を嵌装し、鋼製バンド３１
で縛着する構造である。この場合も、円筒状ゴム３０内
へ注入管１０からの注水すると、円筒状ゴム３０が膨張
して仮想線で示すように被検査管９の内側に密着し、円
筒状ゴム３０間に密閉空間を形成するものである。これ
は一般的なゴムを円筒状に成型して使用することによ
り、図１や図６で示した実施例のものに比べてゴムの費
用が低減できる。The hydraulic tester 1 may have the following structure in addition to the above embodiment. As shown in FIG. 6, a cylindrical rubber outer hose 20 is fitted around the outer periphery of the cylindrical main body 2. The outer hose 20 is formed on both sides of the reinforcing portion 22 in which cloth reinforcing members 21 are partially buried in advance (at three locations in the illustrated example) at both ends in the longitudinal direction and substantially at the center in advance. And non-reinforcing portions 23 in which the reinforcing material 21 is not inserted.
Is tied to the cylindrical main body 2 by a steel band 27. Reference numeral 24 denotes two external hose protrusions protruding from the outer periphery of the non-reinforcing portion 23 to enhance the crimping effect. Reference numeral 25 denotes a ring externally fitted and fixed to the outer periphery of both ends of the cylindrical main body 2, and this ring is for facilitating the fitting of the external hose 20 into the cylindrical main body 2. Reference numeral 26 denotes a ring ridge formed on the outer periphery of the ring 25 for enhancing watertightness. Therefore, when water is injected from the injection pipe 10 into the non-reinforced part 23 of the outer hose 20, the central reinforcing part 22 does not expand and only the non-reinforced part 23 expands and adheres to the inside of the pipe 9 to be inspected. A closed space is formed between the parts 23. Thereafter, the injection pipe 11 between the non-reinforced portions is inserted into the closed space between the non-reinforced portions 23.
Pour water from At this time, the air remaining in the closed space is exhausted through the non-reinforcement-portion exhaust pipe 12 with the water injection. Thereafter, as in the above-described embodiment, the inside of the sealed space is raised to a specified water pressure, and a water pressure test is performed while maintaining the predetermined water pressure. As shown in FIG. 7, cylindrical rubbers 30 are fitted around the outer circumference of the cylindrical main body 2 at predetermined intervals in place of the tube ring 8, and a steel band 31 is provided.
It is a structure to bind with. Also in this case, when water is injected from the injection pipe 10 into the cylindrical rubber 30, the cylindrical rubber 30 expands and closely adheres to the inside of the tube 9 to be inspected as indicated by a virtual line, and a sealed space between the cylindrical rubbers 30. Is formed. By using a general rubber molded into a cylindrical shape, the cost of the rubber can be reduced as compared with the embodiment shown in FIGS.
【００１２】水圧試験器１は、さらに他の実施例として
図８〜図９に示すような構造のものも採用することがで
きる。同図において、短円筒状本体４０,４０を、所定
間隔を有して対向状に配設し、短円筒状本体４０,４０
の対向側面に設けた側壁４１,４１に間隔保持材４２の
端部を固定して短円筒状本体４０,４０の間隔を保持す
る。両短円筒状本体４０,４０間に筒状のゴム製外部ホ
ース２０を掛け渡し、外部ホース２０の両端部を両短円
筒状本体４０,４０の外周に嵌装する。これにより、短
円筒状本体４０,４０と外部ホース２０内に空間部４３
が形成される。外部ホース２０は、前記図６で示した外
部ホースと同一のもので、長さ方向の両端部とほぼ中央
部に布製などの補強材２１を埋設した（図示の例では３
ヵ所）補強部２２と補強材２１を入れない非補強部２３
とからなり、外部ホース２０の両端部の補強部２２を短
円筒状本体４０,４０に嵌装し鋼製バンド２７により固
定する。４４,４４は短円筒状本体４０,４０の外周に形
成した凹溝であり、外部ホース２０の補強部２２を鋼製
バンド２７で短円筒状本体４０,４０に固定するに当た
り、鋼製バンド２７を円筒状本体４０,４０の外周から
縛着して、外部ホース２０の補強部２２を凹溝４４,４
４内にはまり込ませる。これにより、水密性を高めると
ともに、外部ホース２０の短円筒状本体４０,４０から
の抜けを阻止する機能を果たす。間隔保持材４２は、側
壁４１,４１に設けたフック４２ａ,４２ａに掛けた鋼製
ワイヤ４２ｂと、ワイヤ４２ｂの折り返し部とともに着
脱自在に固定する止め具４２ｃ,４２ｃとからなり、短
円筒状本体４０,４０の間隔が広がるのを抑える。前記
した構成において、空間部４３に注入管１０から注水す
ると、先ず空間部４３内が充満し、続いて中央の補強部
２２は膨張することなく非補強部２３のみが膨張して被
検査管９の内側に密着し、非補強部２３間に密閉空間が
形成される。このとき、空間部４３内の水圧による短円
筒状本体４０,４０の引き離し力を間隔保持材４２で支
える。その後、非補強部２３間の密閉空間に非補強部間
注入管１１から注水する。このとき、前記密閉空間に残
存する空気は前記注水に伴って非補強部間排気管１２を
経て排気される。以後は前記実施例のように密閉空間内
を規定の水圧になるまで上昇させ、所定の水圧を保持し
た状態で、水圧検査を行なう。この実施例によれば、短
円筒状本体４０,４０をワイヤ４２ｂのような可撓性の
ある間隔保持材４２により連結することで、曲管であっ
ても容易に被検査管９内に挿入することができる。ま
た、間隔保持材４２は可撓性のあるロッドを直接側壁４
１,４１に固定してもよいし、曲管の無い管路の場合で
あれば、剛性部材を用いることもできる。The hydraulic pressure tester 1 may have a structure as shown in FIGS. 8 and 9 as still another embodiment. In the figure, short cylindrical main bodies 40, 40 are arranged facing each other at a predetermined interval, and short cylindrical main bodies 40, 40 are arranged.
The ends of the spacing members 42 are fixed to the side walls 41, 41 provided on the opposed side surfaces of the short cylindrical bodies 40, 40 to keep the spacing between the short cylindrical bodies 40, 40. A cylindrical rubber outer hose 20 is stretched between the two short cylindrical bodies 40, 40, and both ends of the outer hose 20 are fitted around the outer circumferences of the two short cylindrical bodies 40, 40. Thereby, the space 43 is formed in the short cylindrical main bodies 40 and 40 and the outer hose 20.
Is formed. The external hose 20 is the same as the external hose shown in FIG. 6, and has reinforcing members 21 made of cloth or the like buried at both ends and a substantially central portion in the length direction (3 in the illustrated example).
Location) Reinforcing part 22 and non-reinforcing part 23 without reinforcing material 21
The reinforcing portions 22 at both ends of the outer hose 20 are fitted to the short cylindrical bodies 40 and 40 and fixed by the steel bands 27. Reference numerals 44, 44 denote concave grooves formed on the outer periphery of the short cylindrical bodies 40, 40. When the reinforcing portion 22 of the outer hose 20 is fixed to the short cylindrical bodies 40, 40 by the steel bands 27, the steel bands 27 are used. From the outer periphery of the cylindrical bodies 40, 40, and the reinforcing portion 22 of the outer hose 20 is
4 Thereby, the function of improving water tightness and preventing the outer hose 20 from coming off from the short cylindrical main bodies 40, 40 is achieved. The spacing member 42 comprises a steel wire 42b hung on hooks 42a provided on the side walls 41, 41 and stoppers 42c, 42c detachably fixed together with a folded portion of the wire 42b. Suppress the widening of the 40, 40 spacing. In the above-described configuration, when water is injected from the injection pipe 10 into the space 43, the space 43 is first filled, and then the non-reinforced portion 23 is expanded without expanding the central reinforcing portion 22, and the tube 9 to be inspected is expanded. And a closed space is formed between the non-reinforced portions 23. At this time, the separation force between the short cylindrical bodies 40, 40 due to the water pressure in the space 43 is supported by the spacing member 42. Thereafter, water is injected into the closed space between the non-reinforced portions 23 from the non-reinforced portion injection pipe 11. At this time, the air remaining in the closed space is exhausted through the non-reinforcement-portion exhaust pipe 12 with the water injection. Thereafter, as in the above-described embodiment, the inside of the closed space is raised to a specified water pressure, and a water pressure test is performed while maintaining a predetermined water pressure. According to this embodiment, even if it is a curved tube, it can be easily inserted into the tube 9 to be inspected by connecting the short cylindrical bodies 40, 40 with the flexible spacing member 42 such as the wire 42b. can do. In addition, the spacing member 42 directly connects the flexible rod to the side wall 4.
1, 41, or in the case of a pipe without a curved pipe, a rigid member can be used.
【００１３】なお、前記各実施例において、円筒状本体
２の前部および後部に車輪４、５と並列に図示の仮想線
で示すような車輪４ａ、５ａを設けることもできる。こ
のように車輪４ａ、５ａを設けることで、鋳鉄管などの
被検査管９の受け口９ｂと前記と同様の被検査管９の挿
し口９ｃとの間にあらかじめ隙間のある耐震形継手の場
合に、この隙間に該車輪が落ち込むのを防止することが
でき、円滑な挿入・抜き出しが可能となる。さらに、大
口径８００ｍｍ以上の場合、従来のようなテストバンド
にて水圧試験を行なってきたが、本体重量が大きいこと
や締付ボルトの数が多いことなどより、作業性があまり
良くなかったのに対して、中小口径ばかりでなく、大口
径管の水圧試験の場合でも作業性の良い水圧試験が可能
である。In each of the above embodiments, wheels 4a, 5a as shown by phantom lines in the drawing may be provided in front and rear portions of the cylindrical main body 2 in parallel with the wheels 4, 5. By providing the wheels 4a and 5a in this way, in the case of a seismic joint having a gap in advance between the receiving port 9b of the pipe 9 to be inspected such as a cast iron pipe and the insertion port 9c of the same pipe 9 to be inspected as described above. The wheel can be prevented from dropping into this gap, and smooth insertion and removal can be achieved. Furthermore, in the case of a large diameter of 800 mm or more, a water pressure test has been performed with a conventional test band, but workability was not so good due to a large body weight and a large number of tightening bolts. On the other hand, a water pressure test with good workability can be performed not only for a small and medium diameter pipe but also for a large diameter pipe.
【００１４】なお、図６で示した実施例のものを使用
し、口径２５０ｍｍの被検査管９で実験した結果、外部
ホース２０内に注水し、３．０Ｋｇｆ／ｃｍ2にて水圧
を保持した状態で、密閉空間に注水して所定の水圧をか
けたところ、継手部９ａ（検査箇所）は２Ｋｇｆ／ｃｍ
2の水圧を保持することが確認された。The experiment shown in FIG. 6 was carried out using a test tube 9 having a diameter of 250 mm. As a result, water was injected into the outer hose 20 and the water pressure was maintained at 3.0 kgf / cm 2 . In this state, when water was injected into the enclosed space and a predetermined water pressure was applied, the joint 9a (inspection location) was 2 kgf / cm.
It was confirmed that the water pressure of 2 was maintained.
【００１５】[0015]
【発明の効果】この発明は、以上説明したような形態で
実施されるので、以下に記載されるような効果を奏す
る。この発明によれば、簡単な構造による継ぎ足し式の
移動用竿を使用することにより、水圧試験器を継手部の
位置に確実に合わせることができる。また、本水圧試験
器以外には、少量の水、ポンプのみを準備すれば、検査
が実施できるので、検査にかかる費用が少額ですむ。ま
た、被検査管を接合した直後に、短時間で検査が実施で
き、検査が完了した管を直ちに埋め戻すことができるた
め、配管現場作業エリアを縮小できる。The present invention is embodied in the form described above, and has the following effects. According to the present invention, by using the extension type moving rod having a simple structure, the hydraulic tester can be surely adjusted to the position of the joint. In addition, if only a small amount of water and a pump are prepared in addition to the hydraulic tester, the inspection can be performed, so that the inspection cost is small. In addition, the inspection can be performed in a short time immediately after joining the pipes to be inspected, and the pipes that have been inspected can be immediately backfilled, so that the work area of the piping site can be reduced.
【００１６】さらに、短円筒状本体４０,４０を可撓性
のある間隔保持材４２により連結すれば、曲がり管であ
っても容易に被検査管内に押し込み、検査することがで
きる。Furthermore, if the short cylindrical bodies 40, 40 are connected by a flexible spacing member 42, even a bent tube can be easily pushed into the tube to be inspected and inspected.
【図１】この発明の一実施例に係る水圧試験器の縦断面
図。FIG. 1 is a longitudinal sectional view of a hydraulic tester according to an embodiment of the present invention.
【図２】図１のＡ−Ａ線矢視図。FIG. 2 is a view taken along the line AA of FIG. 1;
【図３】この発明の一実施例に係るチューブリングの一
部拡大縦断面図。FIG. 3 is a partially enlarged longitudinal sectional view of a tube ring according to one embodiment of the present invention.
【図４】この発明の一実施例に係る移動用竿の正面図。FIG. 4 is a front view of a moving rod according to one embodiment of the present invention.
【図５】この発明の一実施例に係る水圧試験器の注水後
の縦断面図。FIG. 5 is a longitudinal sectional view of a hydraulic tester according to one embodiment of the present invention after water injection.
【図６】この発明の他の実施例に係る水圧試験器の縦断
面図。FIG. 6 is a longitudinal sectional view of a hydraulic tester according to another embodiment of the present invention.
【図７】この発明の他の実施例に係る水圧試験器の縦断
面図。FIG. 7 is a longitudinal sectional view of a hydraulic tester according to another embodiment of the present invention.
【図８】この発明の他の実施例に係る水圧試験器の縦断
面図。FIG. 8 is a longitudinal sectional view of a hydraulic tester according to another embodiment of the present invention.
【図９】図８のＢ−Ｂ線矢視図。FIG. 9 is a view taken along line BB of FIG. 8;
【図１０】この発明の実施例に係る水圧試験器の設置状
況を示す概念図。FIG. 10 is a conceptual diagram showing an installation state of a hydraulic tester according to an embodiment of the present invention.
１ 水圧試験器 ２ 円筒状本体 ３ 側板 ４、５ 車輪 ８ チューブリング、 ９ 被検査管 ９ａ 継手部 ９ｂ 受け口 ９ｃ 挿し口、 ９ｄ 水密ゴム １０ チューブリング内注入管 １１ チューブリング間注入管 １２ チューブリング間排気管 １３ 竿取付部 １４ 移動用竿、 ２０ 外部ホース ２２ 補強部 ２３ 非補強部 ３０ 円筒状ゴム ４０ 短円筒状本体 ４１ 側壁 ４２ 間隔保持部材 ４３ 空間部 DESCRIPTION OF SYMBOLS 1 Hydraulic tester 2 Cylindrical main body 3 Side plate 4, 5 Wheel 8 Tube ring, 9 Tube to be inspected 9a Joint part 9b Receptacle 9c Insertion port, 9d Watertight rubber 10 Injection tube in tube ring 11 Injection tube between tube rings 12 Between tube rings Exhaust pipe 13 Rod attachment part 14 Moving rod, 20 External hose 22 Reinforcement part 23 Non-reinforcement part 30 Cylindrical rubber 40 Short cylindrical body 41 Side wall 42 Interval maintaining member 43 Space part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西田 義也 大阪市西区北堀江１丁目12番19号 株式会 社栗本鐵工所内 (72)発明者 上田 隆司 大阪市西区北堀江１丁目12番19号 株式会 社栗本鐵工所内 Ｆターム(参考） 2G067 AA16 BB04 BB26 BB34 CC02 DD02 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshiya Nishida 1-12-19 Kitahorie, Nishi-ku, Osaka City Inside Kurimoto Iron Works, Ltd. (72) Inventor Takashi Ueda 1-112-19 Kitahorie, Nishi-ku, Osaka City F-term in Kurimoto Iron Works (Reference) 2G067 AA16 BB04 BB26 BB34 CC02 DD02
Claims (4)
検査管とを水密ゴムを介装して接続する継手部の水密性
能を検査する水圧試験器であって、該水圧試験器は円筒
状本体２と、円筒状本体２に設けた移動用の車輪４、５
と、円筒状本体２の長手方向外周に所定の間隔を存して
配設した膨張・収縮可能なチューブリング８、８と、該
チューブリングに連通する開口部２ｃ、２ｃに接続した
チューブリング内注入管と、円筒状本体２の長手方向中
間に形成した開口部２ｄ、２ｅにそれぞれ接続したチュ
ーブリング間注入管およびチューブリング間排気管と、
円筒状本体２の後方側の側板３に連結した継ぎ足し可能
な移動用竿１４とからなることを特徴とする中小口径管
用水圧試験器。1. A hydraulic tester for inspecting the watertightness of a joint for connecting a pipe to be inspected such as a cast iron pipe and a pipe to be inspected as described above with a watertight rubber interposed therebetween. Are cylindrical body 2 and wheels 4, 5 for movement provided on cylindrical body 2;
And inflatable / contractible tube rings 8, 8 arranged at predetermined intervals on the outer circumference in the longitudinal direction of the cylindrical body 2, and inside the tube rings connected to the openings 2 c, 2 c communicating with the tube rings. An injection pipe, an injection pipe between tubing and an exhaust pipe between tubing connected to openings 2d and 2e respectively formed in the middle of the cylindrical main body 2 in the longitudinal direction;
A hydraulic tester for small and medium diameter pipes, comprising a movable rod 14 connected to the side plate 3 on the rear side of the cylindrical body 2.
検査管とを水密ゴムを介装して接続する継手部の水密性
能を検査する水圧試験器であって、該水圧試験器は円筒
状本体２と、円筒状本体２に設けた移動用の車輪４、５
と、円筒状本体２の長手方向外周に嵌装固定した補強部
２２と膨張・収縮可能な非補強部２３とからなる外部ホ
ース２０と、該外部ホースに連通する開口部２ｃに接続
した非補強部内注入管と、円筒状本体２の長手方向中間
に形成した開口部２ｄ、２ｅにそれぞれ接続した非補強
部間注入管および非補強部間排気管と、円筒状本体２の
後方側の側板３に連結した継ぎ足し可能な移動用竿１４
とからなることを特徴とする中小口径管用水圧試験器。2. A hydraulic tester for inspecting the watertightness of a joint for connecting a pipe to be inspected such as a cast iron pipe and the same pipe to be inspected as described above, with a watertight rubber interposed therebetween. Are cylindrical body 2 and wheels 4, 5 for movement provided on cylindrical body 2;
And an external hose 20 comprising a reinforcing portion 22 fitted and fixed on the outer periphery in the longitudinal direction of the cylindrical main body 2 and a non-reinforcing portion 23 which can be expanded and contracted, and a non-reinforcement connected to an opening 2c communicating with the external hose. An internal injection pipe, an injection pipe between non-reinforcement parts and an exhaust pipe between non-reinforcement parts connected to openings 2d and 2e formed in the middle of the cylindrical main body 2 in the longitudinal direction, and a side plate 3 on the rear side of the cylindrical main body 2. Movable rod 14 connected to the vehicle
And a hydraulic tester for small and medium diameter pipes.
検査管とを水密ゴムを介装して接続する継手部の水密性
能を検査する水圧試験器であって、該水圧試験器は円筒
状本体２と、円筒状本体２に設けた移動用の車輪４、５
と、円筒状本体２の長手方向外周に所定の間隔を存して
配設した膨張・収縮可能な円筒状ゴム３０と、該円筒状
ゴムに連通する開口部２ｃ、２ｃに接続した円筒状ゴム
内注入管と、円筒状本体２の長手方向中間に形成した開
口部２ｄ、２ｅにそれぞれ接続した円筒状ゴム間注入管
および円筒状ゴム間排気管と、円筒状本体２の後方側の
側板３に連結した継ぎ足し可能な移動用竿１４とからな
ることを特徴とする中小口径管用水圧試験器。3. A hydraulic tester for inspecting the watertightness of a joint for connecting a test pipe such as a cast iron pipe and a test pipe similar to the above with a watertight rubber interposed therebetween. Are cylindrical body 2 and wheels 4, 5 for movement provided on cylindrical body 2;
And an inflatable / contractible cylindrical rubber 30 disposed at predetermined intervals on the longitudinal outer periphery of the cylindrical main body 2, and a cylindrical rubber connected to the openings 2 c, 2 c communicating with the cylindrical rubber An inner injection pipe, a cylindrical inter-rubber injection pipe and a cylindrical inter-rubber exhaust pipe connected to openings 2d and 2e formed in the middle of the cylindrical main body 2 in the longitudinal direction, and a side plate 3 on the rear side of the cylindrical main body 2. A hydraulic tester for small and medium-diameter pipes, comprising a movable rod 14 which can be extended and connected to the pipe.
検査管とを水密ゴムを介装して接続する継手部の水密性
能を検査する水圧試験器であって、該水圧試験器は、所
定の間隔で対向状に配設した側壁４１,４１を有する短
円筒状本体４０,４０と、前記短円筒状本体の間隔を保
持する可撓性を有する間隔保持材４２と、前記短円筒状
本体に設けた移動用の車輪４、５と、前記両短円筒状本
体間に掛け渡し、両端部を該両短円筒状本体の外周に嵌
装固定した補強部２２と膨張・収縮可能な非補強部２３
とからなる外部ホース２０と、前記側壁と外部ホース２
０とで形成する空間部４３に注水する注入管と、外部ホ
ース２０の長手方向中間の補強部２２に形成した開口部
２０ａ、２０ｂにそれぞれ接続した非補強部間注入管お
よび非補強部間排気管と、前記後方側の短円筒状本体４
０の側壁４１に連結した継ぎ足し可能な移動用竿１４と
からなることを特徴とする中小口径管用水圧試験器。4. A hydraulic tester for inspecting the watertightness of a joint for connecting a pipe to be inspected such as a cast iron pipe and the same pipe to be inspected as described above with a watertight rubber interposed therebetween. A short cylindrical body 40, 40 having side walls 41, 41 disposed opposite to each other at a predetermined interval; a flexible spacing member 42 for maintaining the interval between the short cylindrical bodies; The wheels 4, 5 for movement provided on the cylindrical main body and the reinforcing portion 22 fitted and fixed to the outer circumferences of the both short cylindrical main bodies with both ends being stretched between the two short cylindrical main bodies and expandable and contractable. Non-reinforcing part 23
An outer hose 20 consisting of:
0, and a non-reinforcement-portion injection pipe and a non-reinforcement-portion exhaust pipe connected to openings 20a and 20b formed in the reinforcing portion 22 formed in the longitudinally intermediate reinforcing portion 22 of the external hose 20, respectively. Tube and said short cylindrical body 4 on the rear side
A hydraulic tester for small and medium diameter pipes, comprising a movable rod 14 which can be added to the side wall 41 of the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000296249A JP3597455B2 (en) | 2000-01-17 | 2000-09-28 | Water pressure tester for small and medium diameter pipes |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000008392 | 2000-01-17 | ||
| JP2000-8392 | 2000-01-17 | ||
| JP2000296249A JP3597455B2 (en) | 2000-01-17 | 2000-09-28 | Water pressure tester for small and medium diameter pipes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001272300A true JP2001272300A (en) | 2001-10-05 |
| JP3597455B2 JP3597455B2 (en) | 2004-12-08 |
Family
ID=26583663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000296249A Expired - Fee Related JP3597455B2 (en) | 2000-01-17 | 2000-09-28 | Water pressure tester for small and medium diameter pipes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3597455B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296587A (en) * | 2011-05-18 | 2011-12-28 | 中铁西北科学研究院有限公司 | Vibration-free ramming hole-expansion device |
| JP2013040866A (en) * | 2011-08-17 | 2013-02-28 | Saitama City | Hydraulic tester |
| JP2013120124A (en) * | 2011-12-07 | 2013-06-17 | Saitama City | Hydraulic tester pipe carrying-in guiding device |
| CN103557325A (en) * | 2013-10-30 | 2014-02-05 | 东方电气(广州)重型机器有限公司 | Hydraulic test sealing structure of pressure container and mounting and use method of hydraulic test sealing structure |
| CN103954411A (en) * | 2014-05-14 | 2014-07-30 | 宁波工程学院 | Water pressure detecting device and method in drainage pipe |
| JP2014157079A (en) * | 2013-02-15 | 2014-08-28 | Saitama City | Hydraulic tester |
| JP2015219018A (en) * | 2014-05-14 | 2015-12-07 | サンエス護謨工業株式会社 | Piping pressure testing device |
| JP2017049241A (en) * | 2015-08-31 | 2017-03-09 | 横浜市 | Water pressure tester |
-
2000
- 2000-09-28 JP JP2000296249A patent/JP3597455B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296587A (en) * | 2011-05-18 | 2011-12-28 | 中铁西北科学研究院有限公司 | Vibration-free ramming hole-expansion device |
| JP2013040866A (en) * | 2011-08-17 | 2013-02-28 | Saitama City | Hydraulic tester |
| JP2013120124A (en) * | 2011-12-07 | 2013-06-17 | Saitama City | Hydraulic tester pipe carrying-in guiding device |
| JP2014157079A (en) * | 2013-02-15 | 2014-08-28 | Saitama City | Hydraulic tester |
| CN103557325A (en) * | 2013-10-30 | 2014-02-05 | 东方电气(广州)重型机器有限公司 | Hydraulic test sealing structure of pressure container and mounting and use method of hydraulic test sealing structure |
| CN103954411A (en) * | 2014-05-14 | 2014-07-30 | 宁波工程学院 | Water pressure detecting device and method in drainage pipe |
| JP2015219018A (en) * | 2014-05-14 | 2015-12-07 | サンエス護謨工業株式会社 | Piping pressure testing device |
| JP2017049241A (en) * | 2015-08-31 | 2017-03-09 | 横浜市 | Water pressure tester |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3597455B2 (en) | 2004-12-08 |
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