RU2300047C1 - Arrangement for testing pipes - Google Patents

Abstract

FIELD: test engineering.

SUBSTANCE: arrangement comprises device for lying pipes, frame, bearings, systems for driving and pressurizing, and movable and unmovable plugs. The side load-bearing plates are mounted on both sides of the frame. The bottom racks of the transmission engage the teeth of the driving-locking sprockets that permit the movable plug to move together with mandrel and the pipe to be tested. The top racks are mounted on the top of the side plates and permit the movable plug to be locked. The movable plug is provided with through openings for the locks and arranged so that the locks pass between the teeth of the sprockets and are secured to the carriage of the movable bearing provided with the driving system that moves along the rails provided along the arrangement. The mandrel is provided with rollers made of a flexible material. The sealing members of the movable and unmovable plugs are set in yoke locks.

EFFECT: enhanced reliability of testing.

3 cl, 8 dwg

Description

The invention relates to testing equipment, in particular to devices for hydro- and pneumatic testing of pipes of large diameters for strength, tightness and other strength tests.

A known installation for hydraulic testing of pipes (RF patent 2150683, MKI G01M 3/08, F17D 5/02, application. March 23, 1998, publ. 10.06.2000, BI No. 16), containing a device with lodgements for laying pipes, frame, supports movable and fixed plugs with sealing elements, a fixed plug installed on one of the supports, a movable plug drive mounted on another support, a movable plug mounted to move in the direction of the fixed plug, the device with lodges made in the form of a horizontally arranged cylindrical of the vessel with a rectangular cutout in the upper part, providing the possibility of lowering and raising the test pipe, the flat bottoms of the vessel at both ends are supporting and equipped with reinforcing elements, the drive of the movable plug is made in the form of three screw pairs with ball clamps, the hydraulic system associated with one of plugs, contains a collector, a press to create pressure and control valves.

The disadvantages of the installation are the inability to test pipes of large diameter due to the occurrence of excessively large forces on the plugs and clamps, the complexity of the design, the unreliability of the screw drive, high energy consumption.

In addition, the installation is not intended for pneumatic testing.

The closest technical solution to the claimed invention is "Installation for testing pipes" (RF patent 2247957, MKI G01M 3/08, decl. 11.27.2002, publ. 10.03.05, BI No. 7), containing a device for laying pipes, a frame, supports, drive and test pressure generation systems, a movable and fixed plug, a fixed plug installed on one of the supports, a movable plug mounted on the other with the ability to move in the direction of the stationary plug, the movable plug is equipped with a frame for shells of rotation, based on a prism, about the end of the frame is made tapering, the other end is rigidly connected to the movable plug, and the frame has dimensions that allow it to pass freely through the test pipe and the through hole of the stationary plug with the formation of a closed cavity between the test pipe and the frame using sealing elements located in the fixed and movable stubs.

The disadvantages of the known installation are the difficulty of testing large diameter pipes due to the unreliability of the installation due to the possible rollback of the frame with a movable support due to the elongation of the ropes from the forces arising from testing, and bending of the installation at high forces, the increased risk of operation of the installation due to testing in open volume, labor intensive maintenance.

The invention solves the problem of providing the possibility of testing pipes of any diameter, increasing the reliability of operation, reducing the complexity of maintenance and improving the safety of operation of the installation.

This problem is solved by the fact that in the installation for testing pipes containing a device for laying pipes, a frame, a support, a drive system and create a test pressure, a movable and fixed plug, a fixed plug is installed on one of the supports, a movable plug is installed on the movable support with the possibility movement in the direction of the fixed plug, the movable plug is equipped with a frame for shells of rotation, based on the support-prism, one end of the frame is made tapering, the other end is rigidly connected to the movable a flange, and the frame has dimensions that allow it to freely pass through the test pipe and the through hole of the fixed plug with the formation of a closed cavity between the test pipe and the frame using sealing elements located in the fixed and movable plugs, according to the invention, lateral carriers are rigidly fixed on both sides of the frame plates and lower transmission rails with axles under the teeth of the drive-locking sprockets, which provide movement of the movable plug together with the frame and the test the pipe, on the top of the side plates are installed the upper locking rails of the movable plug with through holes for the stoppers, so that the stoppers pass between the teeth of the sprockets and are mounted on the cart of the movable support with a drive system moving along the rails along the installation, the frame is equipped with rollers made of elastic material and the sealing elements of the movable and fixed plugs are installed in the clamp locks. The installation contains stations for filling and creating test pressure in a closed cavity between the frame tested by the pipe and plugs with control means, moreover, the gas supplied by the compressor or the liquid supplied by the pump or press are used as the working medium. Plugs, frame, sealing elements, roller bearings for the tested pipe and frame are replaceable. The frame is made flexible and held by rollers, ensuring its movement with the possibility of repeating pipe bends without jamming, hardening and scoring of its wall, and the hinge is located so that it does not reach the seal of the movable plug when moving the frame.

The installation is installed with a slope towards the fixed plug (movable - higher) to release air from the system when filling the cavity between the test pipe and the frame with a liquid working medium.

In Fig.1 shows a General view of the installation (the elements of ensuring flexibility are not shown), Fig.2 is a view A of Fig.1 (a variant of hydraulic locking), Fig.3 is a section bB of Fig.2, Fig.4 is a a section along BB-1 of FIG. 1, FIG. 5 is a view A of FIG. 1 (locking method with a screw drive), FIG. 6 is a section G-G of FIG. 1 (a seal assembly with a clamp shutter of a movable plug), FIG. .7 - section DD DD of Fig. 6 (seal assembly of a fixed plug), Fig. 8 is a diagram of a hydraulic test.

The installation comprises a frame 1 (Fig. 1, 2) with a lower base 2, an upper base 3 and side bearing plates 4, a movable support 5 with a movable plug 6; a frame 7 for the test pipe 8, based on a support-prism 9 with a movable roller support 10; a fixed support 11 with a fixed plug 12 with a through hole with sealing elements 13 (Fig.7); drive system 14 (FIGS. 1, 2) for storing, holding and pulling out the pipe 8 after the test, which comprises a transmission with lower rails 15 with axles 16 and drive-locking sprockets 17, a retraction 18 of the movable roller support 10, on top of the side bearing plates 4, the upper rails 19 are fixed (FIGS. 2, 3) with through holes 20 for the stoppers 21 (FIG. 3), mounted on a trolley 22 on which a movable support 5 is mounted, moving along the rails 23 (FIGS. 4, 5) along the installation . The frame 7 is equipped with a roller support block 24 (FIG. 4) of elastic material, a roller support assembly 25, a support 26 for supporting the frame after it leaves the fixed plug, the movable plug 6 and the fixed plug 12 with sealing elements 13 are installed in the clamp shutters 27 (FIG. .16). The system for creating a test pressure (Fig. 8) in the annular cavity 28 between the frame 7, the tested pipe 8, the movable 6 and the stationary 12 plugs with seals contains a pump 29, a collector 30 for supplying a working medium, a press 31, manometers 32, a valve 33. During pneumatic tests the system comprises a compressor and safety features (not shown).

Installation works as follows.

Using the lifting mechanism, the test pipe 8 is laid along the installation on the prism supports 9 so that the outer surface of the test pipe 8 is aligned at one end of the through hole of the fixed plug 12, and at the other end, the inner surface of the pipe 8 is aligned with the outer surface of the movable plug frame 7 6. Then, using transmission 14, the movable plug 6 with the frame 7 mounted on the trolley 22 is moved along the rails 23 towards the test pipe using the lower rails 15, axles 16 and sprockets 17. In this case, the frame 7 um into the test tube 8. With further movement of the frame 7, the latter passes through the through hole of the fixed plug 12 with sealing elements 13 inserted into the clamp locks 27, rests on the support 26 and moves until the stop of the tested pipe 8 into the movable plug 6 and the stationary plug 12 s sealing elements 13, tightly fitting the ends of the test pipe 8 with the formation of an annular cavity 28 between the frame 7, the tested pipe 8, movable and fixed plugs. Then the stoppers 21 enter between the teeth of the sprockets 17 and lock the cart 22 with a movable support.

In hydraulic tests, the liquid working medium is pumped through the manifold 30 through the manifold 30 into the cavity 28 until it is filled, which is fixed by the water leaving the valve 34. Then, the press 31 is turned on (the pump and the press can be combined) and the specified test pressure is created, which can withstand the set time what is controlled by manometers. During pneumatic tests, gas (air) is pumped by a compressor into the cavity 28 between the frame 7, the tested pipe 8, movable and fixed plugs to the specified test pressure, which also withstands the set time. Hydraulic and pneumatic tests are carried out in a frame volume closed on three sides, which increases the safety of work.

At the end of the tests, the pressure is released, the test pipe 8 is pulled out by removing the movable plug 6 with the frame 7 from it. Using a lifting mechanism, the pipe is removed from the installation.

The proposed installation is more reliable in testing large diameter pipes by eliminating the rollback of the movable support with a frame, preventing the installation from bending at high forces by installing lateral load-bearing, simultaneously protective, plates and installing with stiffeners.

The frame is equipped with rollers, ensuring its movement along the generatrix of the pipe without mechanical damage and passage through the seal without damage. The sealing of the fixed and movable bearings by quick-detachable, using a clamp lock, speeds up the work of replacing the seals and preparing the installation for testing and reduces its complexity.

Reducing the complexity of maintenance is also achieved by reducing the work due to the exclusion of the cable drive, requiring regular tension due to the lengthening of the cable.

The installation is made with interchangeable plugs, frame, supports, prisms, sealing cuffs, which allows it to be used for testing pipes of various diameters.

The installation is applicable for testing the strength, tightness and other types of hydraulic and pneumatic tests of any shells of rotation in the factory and field conditions.

The present invention can be used for testing at the places of congestion of pipes, their rejection, testing of drums and shells.

Claims (4)

1. Installation for testing pipes, containing a device for laying pipes, frame, supports, drive systems and create test pressure, a movable and fixed plug, a fixed plug is installed on one of the supports, a movable plug is mounted on a movable support with the possibility of movement in the direction of the fixed plug , the movable plug is provided with a frame for shells of rotation, supported by prism supports, one end of the frame is made tapering, the other end is rigidly connected to the movable plug, and the frame has a size s, ensuring its free passage through the test pipe and the through hole of the fixed plug with the formation of a closed cavity between the frame and the test pipe using sealing elements located in the fixed and movable plugs, characterized in that the side bearing plates are rigidly fixed on both sides of the frame and installed lower transmission rails with axles under the teeth of the drive-locking sprockets, providing movement of the movable plug together with the frame and the test tube, at the top of the side plates of the mouth The upper locking rails of the movable plug with through holes for the stoppers are located so that the stoppers pass between the teeth of the sprockets and are mounted on the carriage of the movable support with a drive system moving along the rails along the installation, the frame is equipped with rollers made of elastic material, and the sealing elements are movable and stationary plugs are installed in clamp locks. 2. Installation according to claim 1, characterized in that the plugs, frame, sealing elements, roller bearings for the test pipe and frame are interchangeable. 3. The installation according to claim 1, characterized in that it contains a filling station and creating a test pressure in a closed cavity between the frame, the test pipe and plugs with control means, moreover, the gas supplied by the compressor or the liquid supplied by the pump is used as the working medium or by press. 4. The installation according to claim 1, characterized in that the frame is flexible and held by rollers, ensuring its movement with the possibility of repetition of the pipe bending without jamming, hardening and scoring of its wall, and the hinge is located so that it does not reach the seal of the movable plug .

Images