US3587294A - Rotary tube-testing presses - Google Patents

Rotary tube-testing presses Download PDF

Info

Publication number
US3587294A
US3587294A US810203A US3587294DA US3587294A US 3587294 A US3587294 A US 3587294A US 810203 A US810203 A US 810203A US 3587294D A US3587294D A US 3587294DA US 3587294 A US3587294 A US 3587294A
Authority
US
United States
Prior art keywords
testing
pressure
driving shaft
stationary
tube
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
Application number
US810203A
Other languages
English (en)
Inventor
Erwin Kost
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schloemann AG
Original Assignee
Schloemann AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schloemann AG filed Critical Schloemann AG
Application granted granted Critical
Publication of US3587294A publication Critical patent/US3587294A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2846—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for tubes

Definitions

  • a tube-testing press having a main driving shaft journaled at one end in a stationary bolster and at the other end in an axially movable bolster, with testing-head carriers secured thereon, and a number of testing heads displaceable over stationary cams, and symmetrically arranged around the driving shaft and rotating about the latter, with sealing and clamping devices located in the pipe-testing heads.
  • a pressure-raiser with a differential piston-and-cylinder unit in the main driving shaft provides high-pressure liquid for one cylinder space, the other cylinder space being'in communication with a source of low pressure, for returning the piston.
  • the tube-testing press in this case consists of a stationary bolster arranged upon a base frame, an axially movable bolster, and a main driving shaft joumaled in the bolsters, with a number of tube-testing heads axially displaceable over stationary cams, and symmetrically arranged around the driving shaft and rotating about the latter, with sealing and clamping devices located in the pipe-testing heads.
  • a pressure-raiser with a differential piston for producing an extremely high pressure for the testing of the tubes and for the clamping and sealing of the same in the testing heads, as well as stationary filling liquid and primary pressure liquid connections to the rotating main driving shaft.
  • the object of the present invention is therefore to provide an economically operating rotating tube-testing press, in which the requisite high pressures are produced within the rotating system in an intelligent and simple manner.
  • this aim is attained by arranging a pressure-raiser centrally in the main driving shaft of the stationary bolster of the testing press, revolving with it, and passing the high-pressure testing medium inside the driving shaft and in stationary conduits to the testing heads, the piston of the pressure-raiser being returnable into its initial position by means of a pressure force.
  • the pressure force is provided by putting the cylinder space on one side of the piston into communication with a source of low pressure.
  • the filling water which is in any case available for filling the tubes to be between the rotating system of the testing presses, may for instance be employed in a simple manner for this purpose.
  • a mechanical spring on the other hand, has the disadvantage of a variable spring force conditioned by the stroke, as well as that restricted durability.
  • the differential piston of the pressure raiser is here supplied by primary-pressure liquid on one side of the piston and by filling-pressure liquid on the other side. Consequently the effective primary pressure upon the piston is the difference in pressure between the two pressure liquids.
  • the pressure-raiser is only to be switched on by means of an electrical impulse controlled by the tube that is being tested. In this way it is ensured that the pressure-raiser operates only when a tube is present for testing.
  • HO. 1 is a side view of the tube-testing press as a whole.
  • FIG. 2 shows on a larger scale a longitudinal section through a part of a stationary bolster, with a main driving shaft and a pressure-raiser.
  • FIG. 1 shows the stationary bolster or abutment 2 arranged upon a base frame 1, and an axially movable bolster or abutment 3.
  • the axial displacement of the bolster 3 is effected by means of a displacing motor 4, by way of a pinion 5, and a toothed rack 6 secured upon the base frame l.
  • each of the testing-head carriers 9 and 11 are arranged symmetrically around the main driving shaft 7, a number of testing-head holders l2, movable axially and parallel to the main driving shaft 7, with testing heads 13 directed in each case towards the center of the press.
  • a pair of rollers 14 At the other ends of the testing-head holders 12, namely the ends directed towards the bolster 2 and 3, is arranged in each case a pair of rollers 14, in such a way that their axes are perpendicular to the axes of the testing-head holders.
  • These pairs of rollers 14 roll upon and/or in stationary annular cams 15, arranged around the main driving shaft 7 on the bolsters 2 and 3. These cams, drawn forward in their upper region and rearward in their lower region, effect the axial displacement of the testing heads 13.
  • main driving shaft 7 Upon the main driving shaft 7 are also arranged a number of holding-tongs wheels 16, revolving with the shaft 7, for holding the tubes to be tested during the testing.
  • main driving shaft 7 On the displaceable bolster 3 the main driving shaft 7 is divided into a hollow shaft 7a and a solid shaft 7b, which are so connected with one another by means of key and keyway 17 as to be rotationally fast, but axially slidable one in the other.
  • a casing 18 for the accommodation of sliding electrodes for the transmission of electrical impulses to the rotatableportion of the press, as well as a rotating pressure-raising device 19, with a stationary outer filling-water connection 20, and a likewise stationary primary pressure-water connection 21, the casing 18, and a holding block 22 carrying the water connections 20 and 21, and resting upon a girder 23, constructed as a cantilever or bracket and secured upon the base frame 1.
  • the main driving shaft 7 (see FIG. 2) is journaled in the bolster 2 in radial or self-aligning roller bearings 24.
  • the rotation of the shaft 7 is effected by means of a drive, not shown, by way of a spur gear 26 secured upon it by means of a key and keyway 25.
  • a spur gear 26 secured upon it by means of a key and keyway 25.
  • Upon the spur gear 26 is also provided a copyingmechanism drive 27.
  • a hollow cylindrical externally offset screw-threaded insertion piece 28 upon the external thread 29 of which is secured a cylindrical hollow body 19a.
  • the latter together with a differential piston 30 sliding in it, forms the pressure-raising device 19.
  • the piston rod 31 of the differential piston 30 slides in a bore 32 of the screw-threaded insertion piece 28.
  • This bore 32 is continued with the same diameter into the left-hand end of the shaft 7, and is then extended axially through the shaft 7, and is then extended axially through the shaft 7, beyond the testinghead carrier 9 as a stationary conduit 33 with a smaller bore for the high-pressure or secondary-pressure water, to the testing heads 13.
  • an internally and externally tapering hollow cylindrical filling-water coupling piece 34 secured by means of a screw thread.
  • a bore 35 Through the periphery of this coupling piece there passes a bore 35, with an externally arranged flange 36.
  • a filling-water conduit 37 passes longitudinally around the outside of the pressure-raiser 19, and enters, by way of a further flange 38, through a bore 39 into the main driving shaft 7.
  • the filling water is supplied, by way of a longitudinal bore 40 to the testing heads 13.
  • a branch 40a passes into an annular cavity 4], which is formed between the cylindrical hollow body 19a and the piston rod 31.
  • the cavity 41 is therefore constantly subjected to filling-water pressure.
  • a stationary horizontal cylindrical tubular member 42 mounted upon the holding block or supporting casting 22 projects into the rotating hollow cylindrical filling-water connecting piece 34. Sealing sleeves 43 arranged between these two members 34 and 42 are held by a stufling box 44.
  • the filling water is admitted through the stationary outer filling-water connection 20 into the rotating filling-water connection 34, and passes, by way of the conduit 37, into the bore 40 of the main driving shaft 7.
  • the primary pressure water is passed by way of the primary pressure-water connection 21, and, by way of a stationary cylindrical tubular member 45 arranged in the cylindrical filling-water connecting piece 345, into the rotating pressure-raising cylinder 19a. Between the pressure-raising cylinder 19a and the stationary tubular member 45, further sealing sleeves 46 are held by a stuffing box 47.
  • the primary pressure water energizes the left-hand side of the differential piston 30.
  • the right-hand side of the piston 30 is subject to filling-water pressure.
  • the high-pressure or secondary-pressure water present in the bore 32 is forced by the piston rod 31 through the conduit 33, by way of inlet valves not represented, to the testing heads 13.
  • the differential piston 30 comprises a bush 48, upon the externally offset ends of which are likewise arranged sealing sleeves 49.
  • a further longitudinal bore 50 arranged in the shaft 7 serves for the passage of cables from the sliding electrodes, located in the casing 18, to the testing heads 13.
  • a rotary tube-testing press for the continuous testing of tubes under very high internal pressures, comprising a base frame, a bolster mounted in a stationary position on the base frame, an axially movable bolster, a main driving shaft journaled in the bolsters, tube-testing heads arranged centrally around the driving shaft and rotating about the said shaft, stationary cams, the said tube-testing heads being axially displaceable over the said cams, sealing and clamping devices located in the tube-testing heads, a pressure-raiser, including a differential piston, for producing the very high pressure required for testing the tubes and for clamping and sealing the same in the tube-testing heads, the pressure-raiser being arranged centrally in the main driving shaft of the stationary bolster of the testing press and moving with it, stationary connections for admitting liquids at filling pressure and at a very high pressure to the rotating main driving shaft, stationary conduits inside the driving shaft for conveying the high-pressure liquid to the testing heads, and means for applying pressure to the piston of the pressure-rais
  • a rotary tube-testing press as claimed in claim 1 further comprising means for supplying high-pressure liquid to one side of the differential piston and filling-pressure liquid to the other side.
  • a rotary tube-testing press as claimed in claim 1 further comprising means for producing electrical impulses, and means for bringing the pressure-raiser into operation by means of these electrical impulses, under the control of a tube that is being tested.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Examining Or Testing Airtightness (AREA)
US810203A 1968-04-09 1969-03-25 Rotary tube-testing presses Expired - Lifetime US3587294A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681773160 DE1773160B1 (de) 1968-04-09 1968-04-09 Rotierende rohrpruefpresse zum kontinuierlichen pruefen von rohren unter innendruck mit hoechsten druecken

Publications (1)

Publication Number Publication Date
US3587294A true US3587294A (en) 1971-06-28

Family

ID=5701568

Family Applications (1)

Application Number Title Priority Date Filing Date
US810203A Expired - Lifetime US3587294A (en) 1968-04-09 1969-03-25 Rotary tube-testing presses

Country Status (9)

Country Link
US (1) US3587294A (ja)
JP (1) JPS4924313B1 (ja)
BE (1) BE731181A (ja)
DE (1) DE1773160B1 (ja)
ES (1) ES365402A1 (ja)
FR (1) FR2005830A1 (ja)
GB (1) GB1249921A (ja)
NL (1) NL6903700A (ja)
SE (1) SE338181B (ja)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760632A (en) * 1970-12-04 1973-09-25 Csepeli Tervezo Intezet Pressure testing machines for tubes
US4127026A (en) * 1977-10-13 1978-11-28 Wean United, Inc. Pipe detecting arrangement for an hydrostatic pipe testing apparatus
US4416147A (en) * 1981-07-15 1983-11-22 Hasha Brian B Apparatus and method for hydrostatically testing pipe
CN100425968C (zh) * 2005-08-05 2008-10-15 中国水利水电科学研究院 管材试压机
CN100565168C (zh) * 2008-09-23 2009-12-02 中国石油集团川庆钻探工程有限公司 无尾杆阀的动态检测方法
CN104568470A (zh) * 2015-01-22 2015-04-29 杭州沃镭智能科技股份有限公司 一种真空助力器总成性能在线检测装置的压力测试机构
CN105115670A (zh) * 2015-09-22 2015-12-02 浙江众立不锈钢管股份有限公司 一种钢管水压测试系统
CN105486458A (zh) * 2016-01-25 2016-04-13 南京宝泰特种材料股份有限公司 一种试压装置
CN106198233A (zh) * 2016-08-23 2016-12-07 中国重型机械研究院股份公司 一种适用于多管水压试验的接箍装置
CN107843500A (zh) * 2017-10-13 2018-03-27 中冶天工集团天津有限公司 一种水压机冲水试压装置
CN114264418A (zh) * 2022-01-04 2022-04-01 福安市宇冠制动科技有限公司 一种汽车制动液储液罐密封性检测台

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53107230U (ja) * 1977-02-01 1978-08-29

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE413285C (de) * 1923-11-06 1925-05-04 Anton Zore Vorrichtung zum Pruefen von Rohren u. dgl. auf Innendruck
DE827723C (de) * 1950-08-20 1952-01-14 Rheinische Roehrenwerke A G Rohrpruefpresse fuer das selbsttaetige Abpressen von Rohren
DE946668C (de) * 1954-03-19 1956-08-02 Th Kieserling & Alberecht Rohrpruefmaschine mit Ruecklaufsperre fuer die Aufnahmekoepfe

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760632A (en) * 1970-12-04 1973-09-25 Csepeli Tervezo Intezet Pressure testing machines for tubes
US4127026A (en) * 1977-10-13 1978-11-28 Wean United, Inc. Pipe detecting arrangement for an hydrostatic pipe testing apparatus
US4416147A (en) * 1981-07-15 1983-11-22 Hasha Brian B Apparatus and method for hydrostatically testing pipe
CN100425968C (zh) * 2005-08-05 2008-10-15 中国水利水电科学研究院 管材试压机
CN100565168C (zh) * 2008-09-23 2009-12-02 中国石油集团川庆钻探工程有限公司 无尾杆阀的动态检测方法
CN104568470B (zh) * 2015-01-22 2017-03-08 杭州沃镭智能科技股份有限公司 一种真空助力器总成性能在线检测装置的压力测试机构
CN104568470A (zh) * 2015-01-22 2015-04-29 杭州沃镭智能科技股份有限公司 一种真空助力器总成性能在线检测装置的压力测试机构
CN105115670A (zh) * 2015-09-22 2015-12-02 浙江众立不锈钢管股份有限公司 一种钢管水压测试系统
CN105486458A (zh) * 2016-01-25 2016-04-13 南京宝泰特种材料股份有限公司 一种试压装置
CN106198233A (zh) * 2016-08-23 2016-12-07 中国重型机械研究院股份公司 一种适用于多管水压试验的接箍装置
CN106198233B (zh) * 2016-08-23 2023-11-07 中国重型机械研究院股份公司 一种适用于多管水压试验的接箍装置
CN107843500A (zh) * 2017-10-13 2018-03-27 中冶天工集团天津有限公司 一种水压机冲水试压装置
CN107843500B (zh) * 2017-10-13 2024-03-26 中冶天工集团天津有限公司 一种水压机冲水试压装置
CN114264418A (zh) * 2022-01-04 2022-04-01 福安市宇冠制动科技有限公司 一种汽车制动液储液罐密封性检测台

Also Published As

Publication number Publication date
BE731181A (fr) 1969-06-13
NL6903700A (ja) 1969-10-13
GB1249921A (en) 1971-10-13
ES365402A1 (es) 1971-01-01
JPS4924313B1 (ja) 1974-06-21
FR2005830A1 (ja) 1969-12-19
SE338181B (ja) 1971-08-30
DE1773160B1 (de) 1972-05-04

Similar Documents

Publication Publication Date Title
US3587294A (en) Rotary tube-testing presses
EP0769340B1 (de) Spannantrieb, insbesondere für rotierend angetriebene Spannmittel von Werkzeugmaschinen
DE3821971C2 (de) Stopfbuchse zum Abdichten einer Welle mit großem Rundlauffehler
US4989436A (en) System for axially shifting a roll in a roll stand
FI64441C (fi) Vals med reglerad boejning
GB893426A (en) Improvements in or relating to pressure rollers for calenders, foulards or the like machines
US2953952A (en) Apparatus for cleaning rolls
US3593553A (en) Method and apparatus for rolling tubes
GB2128526A (en) Apparatus for making and breaking screw couplings
US2503464A (en) Tube forming
US2480381A (en) Thrust bearing for seamless tube mills and the like
US4006668A (en) Hydrostatic piston machine having a cylindrical mounting pin
SU912491A1 (ru) Устройство дл резки труб
US2542371A (en) Hydraulic log barker with selflubricating sealing means
US2966846A (en) Print roll support means for rotary print machines
HU177660B (en) Punch bench for forming pipe ingots and method for working the rollers belonging to the punch bench
EP0313610A1 (en) ROLLING STAND.
FI66053C (fi) Styrning foer en borrstaong i en borrmaskin
SU362686A1 (ru) УСТРОЙСТВО ДЛЯ ВЫПРЕССОВКИ и ЗАПРЕССОВКИ
SU495806A3 (ru) Прокатна клеть со сменными валками
US2161023A (en) Drawbench
FR2326992A1 (fr) Dispositif d'avancement, notamment pour laminoirs de forgeage rotatif pour la fabrication de tubes sans soudures
US2822006A (en) Hydraulic saw mill long piston carriage feed
SU986525A1 (ru) Устройство дл установки оправочного стержн
SU616161A1 (ru) Устройство дл синхронизации движени силовых цилиндров