RU194416U1 - PIPELINDER OVERLAPPING DEVICE - Google Patents

Abstract

A device for blocking the pipeline is aimed at improving operational properties and contains a fixed and movable flange 1, 2 with bosses, a stuffing box 3, mounted on the outside of the movable flange, a pipe 4 for stuffing box packing, a swivel bracket 5, equipped with inserts in the form of a blind 6 and an annular 7 disks for shutting off and passing the flow of the transported medium. The flanges are equipped with o-rings 8 for mating with liners. In the bosses of the flanges, three mounting studs are installed parallel to the pipeline. The mounting pin 9 is fixed in the boss on a cylindrical surface with the possibility of rotation about its axis, the mounting pin 10 is fixed in the boss for rotation in the plane of the radial section of the pipeline, the opposite sides of these studs, the mounting pin 11 is fixed in the boss by a spherical bearing 12, the opposite sides of the mounting the studs are threaded with nuts 13, which are also fixed in the bosses by spherical bearings 12. The swivel bracket 5 is installed flax on the mounting pin 9 by means of the sleeve nut 14. The threaded connection “sleeve nut - mounting pin” is made with a step smaller than the step of the threaded connections of the mounting studs 9, 10, 11 with nuts 13. In operation, the flanges and liners are pulled through the o-rings 8 studs 15 and nuts 16. The stuffing box seal is tightened with bolts 17. The sealing rings 8 are made in the form of a thin flat steel base ring coated with sealing graphite material. O-rings are fixed in the flanges by permanent magnets 18, which are installed along the seating surface of the o-ring. The lifting mechanism for changing the inserts comprises a rack 19, a block 20 fixed to the rack, and a chain 21 passing through the block with a lifting bracket 22. The rack 19 is mounted on a fixed flange 1 so that the block is located above the liner located outside the flange connection with the possibility of fixing the lifting bracket in the eye - Bolt 23 mounted on the liner. The swivel bracket 5 is made with a connector along the axis of the mounting hole and consists of two parts that are pulled together by pins 24 and nuts 25. The insert 6 is equipped with a valve 26 to control the presence of the medium and reduce pressure in the pipeline. The liner 6, located outside the flange connection, is equipped with a casing 27 for protection against weathering. On the pipe 4 mounted thrust bushings 28 with a threaded hole for squeezing bolts 29, which in working condition are locked by nuts 30. 4 zp f-ly, 7 ill.

Description

The utility model relates to pipeline transport and can be used to shut off pipelines for technological purposes (installation, repair, testing, etc.).

A device for blocking the pipeline (DEVICE FOR OVERLAPPING PIPELINE. RU 2 349 828) IPC F16L 55/00. Priority: 05/28/2007), containing flanges with bosses and a swivel bracket, equipped with inserts in the form of a blind and ring discs for shutting off and passing the flow of the transported medium. Flanges are equipped with o-rings for mating with liners. Mounting studs are installed in the bosses of the flanges parallel to the pipe in threaded connections of the opposite direction, and a swivel bracket is installed between the flanges and mounted on one of the mounting studs. In working condition, the flanges and liners are pulled through the o-rings with studs and nuts. The device joins the pipeline by welding the supply pipes with the outer ends of the flanges.

The known device has the following disadvantages.

Mounting pins provide dilution and flattening of flanges when changing liners due to deformations of adjacent sections of the pipeline and the flanges themselves. At the same time, distortions and significant loads occur in threaded joints, which impede the work of personnel and create the risk of damage to the pipeline.

O-rings mounted on flanges are difficult to access for inspection and replacement.

The device does not have a lifting mechanism for changing liners in the flange connection, which makes it difficult to service large diameter pipelines (> 400 mm).

To replace the bracket, equipped with liners, in operating conditions requires a complete overhaul of the device overlap, which significantly increases the complexity and time of repair work.

The device is not equipped with means for monitoring the presence of the medium and reducing the pressure in the pipeline, which can cause an emergency when changing liners between the flanges.

The liner outside the flange connection is not weatherproof and corrodes, which reduces the reliability of the overlap device.

The closest technical solution adopted for the prototype is a device for blocking the pipeline (DEVICE FOR OVERLAPPING PIPELINE. RU 2 423 640. IPC F16L 55/10; F16L 55/18. Priority: 08/06/2009), containing fixed and movable flanges with bosses, stuffing box seal mounted on the outside of the movable flange and a swivel bracket equipped with inserts in the form of a blind and ring discs for shutting off and passing the flow of the transported medium. Flanges are equipped with o-rings for mating with liners. At least three mounting studs are installed in the bosses of the flanges parallel to the pipeline. One mounting pin is fixed in the boss on a cylindrical surface with the possibility of rotation about its axis. The second mounting pin is fixed in the boss with the possibility of rotation in the plane of the radial section of the pipeline. The opposite sides of these studs and the third mounting stud are threaded to nuts that are secured to the boss by spherical bearings. The swivel bracket is mounted on one of the mounting studs with a sleeve nut. The threaded connection “sleeve nut - mounting stud” is made with a step smaller than the step of the threaded connections of mounting studs with nuts. In working condition, the flanges and liners are pulled through the o-rings with studs and nuts. The device is connected to the pipeline by welding the end of the pipe with the outer end of the fixed flange and the fit of the movable flange with the gland seal attached to its end on the return pipe.

The device provides dilution and flattening of flanges with minimal effort without jamming the threaded joints of the mounting studs, but it has other analog disadvantages, which are especially manifested in large diameter pipelines (> 400 mm), due to the increase in the mass of moving and removable parts of the structure.

The stuffing box seal is installed on the outer untreated surface of the pipe, deviations of the size and shape of which reduce the reliability of the seal.

The packing gland is moved to the working position after flanges are removed and the bushings are changed manually using a percussion instrument. The operation is labor intensive and is accompanied by damage to the gland.

The problem solved by the utility model is to improve the following operational properties of the pipeline shutoff device:

- increase the reliability of the packing;

- to ensure smooth movement of the stuffing box packing to the working position after the flanges are removed and the bushings are changed;

- ensure the availability of o-rings for inspection and replacement;

- provide the device with a lifting mechanism for changing liners;

- to ensure the installation and removal of the bracket, equipped with liners, without bulkheading the device;

- provide control of the presence of the transported medium in the pipeline and reduce its pressure before changing liners;

- to protect the liner located outside the flange connection from weathering.

 The technical result from the use of the utility model is to increase the reliability and safety of the device for blocking the pipeline, as well as reducing the complexity of pipeline maintenance.

The proposed device for blocking pipelines contains a fixed and movable flanges with bosses, a stuffing box seal mounted on the outside of the movable flange and a swivel bracket equipped with inserts in the form of a blind and ring disks for blocking and passing the flow of the transported medium. Flanges are equipped with o-rings for mating with liners. At least three mounting studs are installed in the bosses of the flanges parallel to the pipeline. One mounting pin is fixed in the boss on a cylindrical surface with the possibility of rotation about its axis. The second mounting pin is fixed in the boss with the possibility of rotation in the plane of the radial section of the pipeline. The opposite sides of these studs and the third mounting stud are threaded to nuts that are secured to the boss by spherical bearings. The swivel bracket is mounted on one of the mounting studs with a sleeve nut. The threaded connection “sleeve nut - mounting stud” is made with a step smaller than the step of the threaded connections of mounting studs with nuts. In working condition, the flanges and liners are pulled through the o-rings with studs and nuts.

To achieve the specified technical result, the device is equipped with a branch pipe for stuffing box packing. Thrust bushings with a threaded hole for squeezing bolts are fixed on the pipe.

The accuracy of the size and shape of the nozzle ensures reliable sealing. Thrust bushings and squeeze bolts provide a smooth, without damage, movement of the packing gland to the working position.

The sealing rings are made in the form of a thin flat steel base ring coated with graphite sealing material and are fixed in the flanges by permanent magnets that are installed along the seating surface of the sealing ring.

The lightweight design of the o-ring ensures its free access to the seat and fixation with permanent magnets.

Further improvement of the operational properties of the device for blocking the pipeline can be achieved by its following versions, which are used for the consistent refinement of previously manufactured products.

The second performance. A device for blocking the pipeline in the first version, characterized in that it is equipped with a lifting mechanism for changing the liners, which contains a rack, a block mounted on the rack and a chain passing through the block with a lifting bracket. The stand is mounted on a fixed flange so that the block is located above the liner located outside the flange connection with the possibility of fixing the lifting bracket in the eyebolt mounted on the liner.

The load-lifting mechanism allows to reduce the physical workload of maintenance personnel when changing liners in a flange connection.

Third performance. A device for blocking the pipeline in the first version, characterized in that the swivel bracket is made with a connector along the axis of the landing hole and consists of two parts that are pulled together by bolts or studs. The detachable design allows installation and removal of the bracket without bulkhead pipeline shutoff device.

Fourth performance. A device for blocking the pipeline in the first embodiment, characterized in that at least one of the liners is equipped with a valve to control the presence of the medium and reduce the pressure in the pipeline. The use of a valve increases the safety of servicing the ceiling device.

Fifth performance. A device for blocking the pipeline in the first embodiment, characterized in that the liner located outside the flange connection is equipped with a casing or cover for protection against atmospheric effects.

A device for blocking the pipeline is connected to the pipeline by welding the supply pipes with the external ends of the fixed flange and the pipe under the gland seal.

A preferred embodiment of the shutoff device for the pipeline includes features of all designs. A general view of the device is shown in FIG. 1, in FIG. 2 is a section AA in FIG. 1, in FIG. 3 remote element B in FIG. 2, in FIG. 4 - remote element B in FIG. 2, in FIG. 5 is a section GG in FIG. 1, in FIG. 6 - section D - D in FIG. 1, in FIG. 7 - remote element E in FIG. 2.

The device for blocking the pipeline contains a fixed and movable flanges 1, 2 with bosses, a stuffing box seal 3, mounted on the outside of the movable flange, a nozzle 4 for a stuffing box seal, a swivel bracket 5, equipped with inserts in the form of a blank 6 and an annular 7 disc for overlapping and transmission flow of the transported medium. The flanges are equipped with o-rings 8 for mating with liners. In the bosses of the flanges, three mounting studs are installed parallel to the pipeline. The mounting pin 9 is fixed in the boss on a cylindrical surface with the possibility of rotation about its axis, the mounting pin 10 is fixed in the boss with the possibility of rotation in the plane of the radial section of the pipeline, the mounting pin 11 is fixed in the boss by a spherical bearing 12, the opposite sides of the mounting studs are inserted into threaded connections with nuts 13, which are also fixed in the bosses by spherical bearings 12. The swivel bracket 5 is mounted on the mounting pin 9 by bushing nut 14. The threaded connection “bushing nut - mounting stud” is made in increments smaller than the pitch of the threaded joints of mounting studs 9, 10, 11 with nuts 13. In working condition, the flanges and liners are pulled through the o-rings 8 by studs 15 and nuts 16. The stuffing box seal is tightened with bolts 17. The sealing rings 8 are made in the form of a thin flat steel base ring coated with sealing graphite material. O-rings are fixed in the flanges by permanent magnets 18, which are installed along the seating surface of the o-ring.

The lifting mechanism for changing the inserts comprises a rack 19, a block 20 fixed to the rack, and a chain 21 passing through the block with a lifting bracket 22. The rack 19 is mounted on a fixed flange 1 so that the block is located above the liner located outside the flange connection with the possibility of fixing the lifting bracket in the eye - Bolt 23 mounted on the liner.

The swivel bracket 5 is made with a connector along the axis of the mounting hole and consists of two parts that are pulled together by pins 24 and nuts 25.

The liner 6 is equipped with a valve 26 to control the presence of the medium and reduce the pressure in the pipeline.

The liner 6, located outside the flange connection, is equipped with a casing 27 for protection against weathering.

On the pipe 4 mounted thrust bushings 28 with a threaded hole for squeezing bolts 29, which in working condition are locked with nuts 30.

The device for overlapping is connected to the pipeline by welding the supply pipes with the outer ends of the fixed flange 1 and the pipe 4 under the gland seal.

The device operates as follows.

If necessary, block the pipeline from the liner 6 remove the protective casing 27 and in the eyebolt 23 of the liner 6 fasten the lifting bracket 22. The chain 21 is fixed to prevent the liner from falling. By rotating the bolts 17, the interference in the stuffing box seal 3 is removed, the bolts 29 are released from the stop by the nuts 30, and by turning the bolts 29 they are removed from the stuffing box, making room for the movable flange to move.

Remove the nuts 16 and the studs 15. Rotate the mounting studs 9, 10, 11 to open the flanges 1, 2, the sealing rings 8 and the liner 7. In this case, the spherical bearings 12 compensate for the misalignment of the threaded joints of the mounting studs and nuts 13, and between the liner 7 and the sealing rings 8 gaps are formed. The gaps are formed due to the smaller thread pitch in the connection of the stud 9 and the sleeve nut 14 relative to the thread pitch in the connection of the mounting studs 9, 10, 11 with the nuts 13. The sealing rings are separated from the permanent magnets 18 and removed from the flange connection. After revision or replacement, the o-rings are brought to the seating surfaces of the flanges, where they are again captured by permanent magnets.

Next, the chain fixation is removed and, while holding the insert 6 with a chain, the bracket is brought into the equilibrium position. Then, the lifting bracket is fixed in the eyebolt of the insert 7, the tension of the chain bring the insert 6 to the place of its mating with the sealing rings and fix the chain again. By rotating the mounting studs, the flanges, sealing rings 8 and insert 6 are brought together. By rotating the squeeze bolts 29 in the threaded bushings 28, the stuffing box packing is moved to the working position and tightened by bolts 17. The flanges and the insert 6 are tightened by the studs 15 and nuts 16 through the sealing rings.

After completion of work on the closed pipeline, the valve 26 checks for the presence of medium and pressure in the pipeline. Valve 26 is opened and the pressure in the pipeline is reduced to atmospheric. Then the valve is closed. The replacement of the liner 6 with the liner 7 to pass the flow of the transported medium is carried out by the same steps as when the pipeline was closed. After completion of work, a protective cover 27 is installed on the liner 6 on the device for blocking the pipeline.

The industrial applicability of the utility model is confirmed by the operation of the installation series. The production of a device for blocking the pipeline was implemented in a metalworking plant.

The utility model allows to reduce operating costs for technological shutoff of pipelines.

Claims (5)

1. A device for blocking the pipeline, containing a fixed and movable flanges with bosses, a stuffing box seal, mounted on the outside of the movable flange, and a swivel bracket equipped with inserts in the form of a blind and ring disks for shutting off and passing the flow of the transported medium, the flanges are equipped with o-rings under mating with liners, at least three mounting studs are installed in the bosses of the flanges parallel to the pipeline, one mounting stud is cylindrically mounted in the boss of the surface with the possibility of rotation about its axis, the second mounting pin is fixed in the boss with the possibility of rotation in the plane of the radial section of the pipeline, the opposite sides of these studs and the third mounting pin are inserted into threaded connections with nuts that are fixed in the boss by spherical bearings, the swivel bracket is installed on one of the mounting studs by means of a sleeve nut, the threaded connection “sleeve nut - mounting pin” is made with a step smaller than the step the threaded connections of the mounting studs with nuts, in working condition the flanges and liners are pulled through the o-rings with studs and nuts, characterized in that the device is equipped with a pipe for the stuffing box seal, persistent bushings with a threaded hole for squeezing bolts are fixed on the pipe, the sealing rings are made in the form of a thin flat steel base ring, coated with sealing graphite material, the sealing rings are fixed in the flanges by permanent magnets that are installed along the landing full-time surface of the o-ring. 2. The device for shutting off the pipeline according to claim 1, characterized in that it is equipped with a load-lifting mechanism for changing the inserts, which contains a rack, a block mounted on the rack and a chain with a lifting bracket passing through the block, the rack is mounted on a fixed flange so that the block is located above the insert located outside the flange connection with the possibility of fixing the lifting bracket in the eyebolt mounted on the liner. 3. The device for shutting off the pipeline according to claim 1, characterized in that the swivel bracket is made with a connector along the axis of the landing hole and consists of two parts that are pulled together by studs or bolts. 4. The device for shutting off the pipeline according to claim 1, characterized in that at least one of the inserts is equipped with a valve to control the presence of the medium and reduce the pressure in the pipeline. 5. The device for shutting off the pipeline according to claim 1, characterized in that the liner located outside the flange connection is equipped with a casing or cover for protection against atmospheric effects.

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