SU1670454A1 - Stopper for testing pipes for tightness - Google Patents

Abstract

The invention relates to instrumentation technology and can be used to seal hollow articles when they are tested for tightness with excessive pressure of the medium. The purpose of the invention is to increase the reliability and safety of the tests. The cap contains a cover 1, a cap element 3 with thrusts 4, 6 and a sealing assembly in the form of a fastening screw 7 with a channel 8 for supplying a test medium carrying the sleeve 11, a disk 10 and a sealing sleeve 12. The sealing assembly is provided with a conical sleeve 14, the end which is made with a bevel, parallel to the sleeve 11, and is mounted for movement relative to it and press the sleeve 12. 4 Cp f-ly, 4 ill.

Description

one

(21) 4469490/29

(22) 02.08.80

(46) 08/15/91. Bul №30

(71) Trust No. 7 of the Ministry of Installation and Special Construction Works of the USSR

(72) P. S. Bolotin (53) 621.6- 3 (088.8)

(56) USSR Author's Certificate N 1399650, cl. G 01 M 3/08, 1986.

(54) PLUG FOR TESTING TUBES FOR TIGHTNESS

(57) The invention relates to a measuring and control technique and can be used for sealing hollow

products when they are tested for tightness overpressure environment. The purpose of the invention is to increase the reliability and safety of the tests. The cap contains a cover 1, a cap element 3 with thrusts 4, 6 and a sealing assembly in the form of a fastening screw 7 with a channel 8 for supplying a test medium carrying the sleeve 11, a disk 10 and a sealing sleeve 12 The sealing assembly is provided with a conical sleeve 14, the end of which is made with a bevel parallel to the sleeve 11, and is mounted for movement relative to it and press the sleeve 12 4 cpfl, 4 slugs.

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The invention relates to a measuring and measuring technique and can be used for sealing hollow articles when tested for leaktightness with excessive pressure of the medium.

The purpose of the invention is to increase the reliability and safety of the tests.

FIG. 1 shows a plug for testing small-diameter pipes, a longitudinal section; in fig. 2 shows section A-A in FIG. one ; in fig. 3 - plug for testing large-diameter pipes, longitudinal section; in fig. 4 - plug for testing pipes with a flange, a longitudinal section.

The plug for testing the tightness of the pipe contains a cover 1 mounted on the end of the pipe 2, an annular cap element 3 with diametrically fixed rods 4, a self-sealing device with wedge liners 5 and additional rods 6 connecting the cap 1 with the cap element 3. and the sealing assembly made in the form of a clamping screw 7 with a through channel 8 for supplying the test medium and a clamping nut 9, a disk 10 fixed at the end of the clamping screw 7, bearing sleeves 11 mounted concentrically to the screw 7 and the end TCR fixed on the disc 10 and the sealing hydrochloric sleeve 12 mounted on the bearing bushing 11.

The cover 1 has a through hole 13 for accommodating the fastening screw 7, and the diameter of the disk 10 is larger than the diameter of the carrier sleeve 11 and smaller than the internal diameter of the pipe 2.

The sealing unit is provided with a conical sleeve 14, on the lid 1 from the side of the pipe 2 an internal annular groove 15 is made, with one end of the conical sleeve 14 having a large base mounted in the annular groove 15, and its second end is made with a bevel parallel to the supporting sleeve 11, and is mounted movable relative to it.

The plug is also equipped with a removable stop ring 16 with pressure screws 17 and the pipe 18 for supplying the test medium. At one end of the bearing sleeve 11, a cork 19 is rigidly fixed, and on the other - a ring 20 with the formation of a collar. A lid 21 is provided in the lid 1 to accommodate the carrier sleeve 11, which is oriented with the ring 20 towards the pipe 2. A stopper ring 16 and a test medium supply pipe 18 are fixed to the plug 19 outside the lid 1. Seal the sleeve 12 is installed on the carrier sleeve 11 with an emphasis in the collar, and the pressure screws 17 are installed with an emphasis in the cover 1.

The wedge liners 5 are made with corrugations on the surface facing the pipe 1, and on the outer surface of the cover

1, an annular groove 22 is formed, which is located symmetrically with the inner groove 15.

On the inner surface of the flange 3, grooves 23 are made for the wedge liners 5, and the shape of the grooves 23 corresponds to the shape of the liners 5. In the flange

0 3 and the lid 1 are made respectively of the holes 24 and 25 for the t 4 and 4, which are equipped with threaded shanks with nuts 26, and in the lid 1 there are the holes 27 for the additional t 6 of the other.

5 The ring 16 is connected to the stopper 19 with fasteners 28.

The device works as follows.

On the end section of the test pipe 2, a cap element 3 is installed. A sealing assembly is inserted inside the pipe 2.

When assembling the cap of FIG. 1, fasten the cover 1 to the stop at the end of the pipe 2 on the fastening screw 7, then tighten the nut 9, and the sealing sleeve 12 is deformed by means of the disk 10 and the conical sleeve 14, which moves with its end face with a bevel relative to the surface of the bearing sleeve 11.

When assembling the cap of FIG. 3 install the cover 1 on the end of the carrier sleeve 11, with which the stopper 19 is rigidly connected. Then using fastening elements 28

5, a stop ring 16 is attached to the plug 19 with pressure screws 17. When the screws 17 are screwed in by means of the ring 20 and the cover 1, the sealing sleeve 12 is deformed, while pressing

0 sleeve 12 to the inner surface of the pipe

2 with sufficient force to ensure tightness.

Then, holes 5 and 4 are inserted into the openings 25 of the lid 1 and the openings 24 of the swivel element, and nuts 26 are screwed onto the shanks. The swivel element 3 is pushed along the pipe by the length of the th g 4 The grooves 23 of the swivel element 3 are inserted into surface 0 of the test tube 2 with a slight blow to them (or to additional tons of 6).

Next, they are tightened with 4 nuts 26, and a manometer or pressure pipe 5 is connected to the through channel 8.

The pipe test is performed as follows.

In the pipeline raise the pressure to the test value. At the same time, the pressure of the working medium through the disk 10 is perceived by the elastic sleeve 12. The axial force is transmitted through the cover 1 and the plugs 4 to the inserts 5. As the movement increases further, the liquid tends to push the sealing unit out of the pipe, which is displaced relative to the pipe, the blocking element 3 is more wedged, which ensures reliable sealing of the pipe end and safety during testing.

For pipes with a flange end (Fig. 4), the cover 1 is installed on the screw 7 with the other side. In this case, the wedge grip is not used, and the connection of the cover 1 with the flange is performed by steps 4.

The cap of FIG. 1 it is advisable to use for pipes with small diameters (up to 100 mm), and a plug according to FIG. 4 - for pipes with large diameters.

Formula of invention

Claims (5)

1. A plug for testing pipes for tightness, comprising a lid mounted on the pipe end, an annular girder girdle with diametrically fixed rods and a self-jamming device with wedge liners and a sealing unit, which is designed to improve reliability and safety tests, the plug is provided with additional rods connecting the lid to the flare element, the sealing assembly is designed as a clamping screw with a through channel for supplying the test medium and a clamping nut, a disk, a rigid on the end of the fastening screw, the carrier sleeve mounted concentrically with the screw and the ends rigidly mounted on the disk, and the sealing sleeve mounted on the carrier AA C 2 the sleeve has a through hole for placing the clamping screw, and the diameter of the disk is larger than the diameter of the bearing sleeve and smaller than the internal diameter of the pipe. 2. The cap on p. 1. Distinguishing - so. that the sealing assembly is provided with a conical bushing, an inner annular groove is made on the lid on the pipe side, one end of the conical bushing is mounted with a large base in the annular groove, and the other end is made with a bevel parallel to the bearing bushing and is movable relative to it. 3. The cap under item 1, characterized in that it is equipped with a removable stop ring with pressure screws and a test environment supply pipe, a stopper is rigidly fixed at one end of the bearing sleeve, and a ring is formed at the other end of the bearing sleeve an opening for accommodating the carrier sleeve, oriented ring towards the pipe, on the cork outside the cover is fixed the stop ring and the supply pipe for the test medium, the sealing sleeve is installed on the carrier sleeve with emphasis in the collar, and the pressure screws are installed with rum cover. 4. A cap according to claim. 1, characterized in that the wedge liners are made with grooves on the surface facing to the pipe. 5. A cap pop. 2, characterized in that an annular groove is made on the outer surface of the lid, which is located symmetrically with the inner groove.