JPS58206943A - Hydraulic pressure testing device of pipe or the like - Google Patents

Abstract

PURPOSE:To extend a durable life, by providing plural rod-like seal materials having rubber elasticity, which are wound round in series in the pipe axial direction along the outside circumferential face of a pipe to be tested, and are provided with a clamping mechanism by which each of them draws both end parts in each opposite direction, and a pre-loading piston. CONSTITUTION:Each outside cylinder 1 of the head and the tail of a hydraulic testing machine body is installed to both end parts of a pipe to be tested 10, rod-like seal materials 4, 5 are wound around in series like a circular arc, subsequently, the seal materials 4, 5 are clamped suitably by clamping mechanisms 6, 7, and thereafter, pre-loading is applied into both of the outside cylinders 1, a pre-loading piston 3 is advanced, and the seal materials 4, 5 are made to adhere closely to a backup hardware 2. After said static operation, a prescribed testing hydraulic pressure liquid is injected from a pressurized water injecting socket 8 of one outside cylinder 1 and is pressed. In this case, the other end part of the pipe to be tested 10 is sealed by the other outside cylinder 1 so that high pressurized water does not leak.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a water pressure testing device for pipe bodies, and its purpose is to have a long service life as a sealing material and to withstand high water pressure for testing. In addition, the outer diameter of the pipe end is significantly larger than the pipe diameter due to upset processing, flange, insertion, and socket joint processing, which are especially performed on the pipe end to increase strength. The purpose of the present invention is to provide a water pressure testing device for pipes that can be applied to the pipe-〇 test in which the pipes are heated. It also makes it possible to apply

In general, all steel pipes, except pot pipes, are subjected to a water pressure test before purchase. This hydraulic test is primarily performed as a means of detecting pipe defects and is not performed at pressures that are directly related to actual burst pressures, service pressures, or design materials. However, On the other hand, depending on the use of steel pipes, there are two types of hydraulic test pressure: specified pressure, which is specified by the applicable standards, and specified pressure, which is determined by agreement with the relevant parties. ^ Pressure piping and other special steel pipes for oil wells made by Yasugi are tested at 70 [1 kg 7 cal] for steel pipes for oil well drilling, and 9/cI at 1050 for steel pipes for oil well drilling. A testing device is used to apply internal pressure to the pipe for a specified, specified, or in-house standard period of time using water pressure according to the regulations, specifications, or in-house standards, and to inspect for defects such as leaks.

The conventional water pressure test equipment used for such water pressure tests has an insertion end of the main body of the water pressure tester into which the tube to be tested is inserted. A ring-folding backing is used, which has a built-in coil spring or ring-shaped wave spring that compresses and biases the tube under test in the circumferential direction KFf of the tube under test. These act as an initial pressure to reduce the internal pressure in the test tube and maintain watertightness.

However, with the above-mentioned conventional technology, the backing with a built-in coil spring has a small amount of deformation and compression, and the backing with a built-in ring wave spring has a large deformation and a large compression, but both have a short service life and the above-mentioned problems. There is a problem in that this method cannot be applied to a tube to be tested in which the outside diameter of the tube portion that has been subjected to upset processing or the like is larger than the tube diameter.

The present invention is based on the above-mentioned conventional pipe water 8:
&, I'm going to do something to improve this.

In general, the present invention is provided at the test tube insertion end of the main body (outer cylinder) of the hydraulic tester.
tltlc, a number of comb bullets wound in series in the tube axis direction along the outer circumferential surface of the tube under test, each equipped with a tightening mechanism that individually pulls both ends in opposite directions. This is a pipe hydraulic testing device characterized by being provided with a rod-shaped sealing material and a preloading piston for preloading the sealing material.

Next K,' The tubing hydraulic testing apparatus of the present invention is shown in the figure (1) and will be explained based on an embodiment. This front sectional view corresponds to the 1-1 arrow cross sectional view in Figure 2.m2
The figure is a cross-sectional view taken along the O-Rin arrow in FIG.

In the figure, the symbol (υ) is the outer cylinder of the main body of the hydraulic tester, which consists of a pair of heads and tails. The end ρ is inserted. Also, the other end K of the test tube + IG [Figure 1]
Although N is omitted, the other outer cylinder ψ is inserted. An aqua regia injection socket (8) is provided at the front end of the one outer cylinder 110, from which high-pressure water corresponding to the test water 1EK is injected. In addition, the insertion of each outer cylinder (〃; tOVr is
A backup metal fitting (2) having a hole inserted therein to accommodate the circumference of one tube under test αa is fixed by fixing the flanges of both the outer cylinders (1) and K with bolts. It has become 5. i41. i51 is a rod-shaped sealing material that is important in the present invention, and is wound back in series in the tube axis direction along the outer circumferential surface of the tube under test IIO at the inside position of the backup metal fitting 121. and is equipped with nine tightening mechanisms +71, each of which pulls both ends in opposite directions. This rod-shaped sealing material (tl, i51 is brought into close contact with the outer circumferential surface of the tube to be tested by the operation of the tightening mechanism IQ), I51 just before applying the test water pressure, and sealing of the aqua regia is performed. This tightening mechanism 1! ! 1. ＋ヱIK can have various configurations, but the example shown in Figure 1 is the simplest tension mechanism, 1IliG flange, al is OI
J song 01 is connecting rod, Ql is joint, cl
G is volt. In addition, since the rod-shaped sealing material (4) bar 6) is used for sealing high-pressure water as described above, the cross-sectional shape is made of synthetic rubber, natural rubber, or synthetic resin-based rubbery substance having rubber elasticity. is round,
It is made in the shape of a rod, such as a square or polygon. 18) is a preload piston, and the rod-shaped sealing material +41. In order to preload +51, the inner position, that is, the outer cylinder space 19101JK is provided. [14+ are all 0 rings. Further, all shown in Figure 2 is an outer groove fixing plate, and d2 is a bolt for fixing the outer structure. O5 is the rod-shaped sealing material +41. Along with i61, this is an important protrusion, and as shown in FIGS. 1 and 2, there is a rod-shaped sealing material on the backup metal fitting (2) that protrudes into the outer cylindrical space and is wound around the outer peripheral surface of the tube under test 1111. 14) is provided so as to protrude in a shape that fills the arc-shaped space gap.

Since the pipe hydraulic testing device of the present invention has the above-described configuration, it can be applied to hydraulic testing not only of steel pipes and other metal pipes, but also of other plastic pipes and the like.

Next, a procedure for conducting a water pressure test on pipes using the apparatus of the present invention will be explained. First, the head and tail outer cylinders (9 are attached to both ends of the test tube αG, respectively, and the bar-shaped sealing material 14) ill are wound in series in an arc shape, and then the tightening machine l11t61. Appropriate sealing material +41. After tightening +51, both outside ItB
The preload piston 13) is moved forward by applying preload inward, and the sealing material +41. Attach +5+ to backup hardware (2). After the static operation described above, a predetermined test hydraulic fluid is injected from the pressure water injection tank of one outer cylinder (9) and pressurized. In this case, the other end of the test tube αG is Needless to say, the water is sealed to prevent shallow water.

The water pressure test of pipes performed by the device of the present invention using the above procedure has a longer service life than the ring-shaped backing in the conventional device, and the sealing action is completely performed even when the test water pressure is high. Moreover, it exhibits excellent electrodynamic properties and can be applied even to pipes in which the outer diameter of the pipe end is significantly larger than the pipe diameter.

In addition, by interposing a resistant woven fabric or the like between the rod-shaped sealing material 141 and 151 of the apparatus of the present invention that comes into contact with the tube when the tube is wound, the steel tube can be quenched. It can also be effectively used as a device for However, in that case, the outer tube of this device only needs to be attached to one end of the hardened pipe body.

[Brief explanation of the drawing]

8I! 1 is a front sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along arrow 1-1 in FIG. 1, and FIG.
It is an arrow sectional view. ψ Water pressure tester main body (outer cylinder), (2) Backup hardware,
+31 Yo-King Piston-141, ill rod-shaped sealing material, (
! i), (n tightening mechanism, +81 E water injection knob, (
9) Outer cylinder space, test tube, on external fixing plate, tta bolt, +13. Q41017 ng, αS protrusion, ae
Flange, α71011 ring, ill connection rod, shout joint, (support) bolt. Agent: Patent Attorney Sanro Kimura and Muneharu Sasaki

Claims (1)

[Claims] The inner side of the backup metal fittings attached to the insertion end of the tube to be tested on the main body of the water mold tester (outer station) is fJ (w). , and is characterized by being provided with a number of rubber-elastic bow sealing members each having a tightening mechanism that pulls both ends in opposite directions, and a preloading piston for preloading the sealing member. Piping water pressure testing equipment.