CN212226331U

CN212226331U - Thrust-free rotary compensator for pipeline

Info

Publication number: CN212226331U
Application number: CN202020818663.5U
Authority: CN
Inventors: 唐建君
Original assignee: Sichuan Energy Investment Construction Group Design And Research Institute Co ltd
Current assignee: Sichuan Energy Investment Construction Group Design And Research Institute Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-12-25
Anticipated expiration: 2030-05-15

Abstract

The utility model relates to a thrust-free rotary compensator for pipelines, including a rotary pipe and a rotary seat, the rotary pipe is sleeved in the rotary seat, one side of the rotary seat is provided with a rotary flange, the rotary pipe is sleeved with a gland flange, a filling cavity is left between the rotary flange and the rotary pipe, a sealing filler is arranged in the filling cavity, the rotary pipe is sleeved with a filler flange, the surface of the filler flange close to the gland flange is provided with a filler pipe, the gland flange is provided with a filler hole, the filler flange is internally provided with a push ring, a closed cavity is formed between the push ring and the filler flange, the cavity is internally provided with the sealing filler, the push ring is provided with a driving component, and the push ring is moved along the inner wall of the filler flange through the driving component so as to press the sealing filler in the cavity to enter the filling cavity from; and a sealing assembly is arranged in the filling pipe, and the opening and closing of the filling pipe are controlled through the sealing assembly. The utility model has the advantages of be convenient for carry out the replenishment to the sealing filler in the rotation compensator.

Description

Thrust-free rotary compensator for pipeline

Technical Field

The utility model belongs to the technical field of the technique of pipeline compensator and specifically relates to a thrust-free rotary compensator is used to pipeline is related to.

Background

An industrial pipe network needs to be provided with a proper number of pipe compensators to absorb or compensate the axial displacement of the pipes caused by the temperature change of the fluid in the pipe network. The rotary compensator without thrust is a new compensator in the aspect of thermal expansion compensation of a heat distribution pipeline. The structure of the device mainly comprises an integral sealing seat, a sealing gland, a reducer, an antifriction centering bearing, a sealing material, a rotary cylinder and other components, more than two components are required to be assembled into a group when the device is arranged on a thermal pipeline, and the relative rotation is formed to absorb the thermal displacement of the pipeline, so that the stress of the pipeline is reduced.

The existing Chinese patent with the granted publication number of CN207213470U discloses a thrust-free rotary compensator, wherein one end of a rotary base is provided with a rotary base flange, the other end of the rotary base is provided with an arc-shaped shrinkage pipe, one side of the rotary base flange is provided with a packing gland flange, the other side of the rotary base flange is provided with a spring, a spring is arranged between the spring flange and the rotary base flange, the outer circumference of the rotary pipe is provided with a rotary pipe convex ring, the inner wall of the rotary base is provided with a packing ring, the packing gland flange and the rotary pipe convex ring form a first packing cabin, the rotary pipe convex ring and the packing ring of the rotary base form a second packing cabin, and sealing packing is respectively arranged in the first packing cabin and the second; one end of the rotating pipe is provided with an outward turning port, and an end face sealing ring is arranged between the port and the rotating seat packing ring.

The above prior art solutions have the following drawbacks: the rotary pipe of the rotary compensator rubs with the sealing filler in the self-rotating process, the filler can leak after being used for a long time, a nut on the filler gland flange needs to be screwed down to detach the filler gland flange when the leakage occurs, the filler is added, the recompression flange is restored to use, and the whole operation is time-consuming and labor-consuming.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pipeline is with no thrust rotation compensator, has the advantage that is convenient for carry out the replenishment to the sealing filler in the rotation compensator not enough to prior art existence.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: a thrust-free rotary compensator for a pipeline comprises a rotary pipe and a rotary seat, wherein the rotary pipe is sleeved in the rotary seat, a rotary flange is arranged on one side of the rotary seat, a gland flange is sleeved on the rotary pipe, a filling cavity is reserved among the rotary flange, the rotary seat and the rotary pipe, sealing filler is arranged in the filling cavity, a filler flange is sleeved on the rotary pipe, and the filler flange is positioned on the other side, away from the rotary flange, of the gland flange; the surface, close to the gland flange, of the packing flange is provided with a packing tube, the gland flange is provided with a packing hole, the packing hole is in plug fit with the packing tube, the packing flange is bucket-shaped, the surface, far away from the gland flange, of the packing flange is provided with an opening, a pushing ring is arranged in the packing flange, a closed cavity is formed between the pushing ring and the packing flange, sealing packing is arranged in the cavity, and the packing tube is communicated with the cavity; the driving assembly is arranged on the pushing ring, and the pushing ring moves along the inner wall of the packing flange through the driving assembly so as to press the sealing packing in the cavity to enter the filling cavity from the packing pipe; and a sealing assembly is arranged in the filling pipe, and the opening and closing of the filling pipe are controlled through the sealing assembly.

Through adopting above-mentioned technical scheme, the filler flange supplies the sealing filler to fill wherein, the filled tube is used for communicateing packing chamber and cavity, when the push ring removed in the filler flange, the push ring can play extruded effect to the sealing filler in the cavity, and the extruded sealing filler of pushed ring can get into the packing intracavity along the filled tube to play and carry out supplementary effect to the sealing filler of packing intracavity leakage. The driving assembly is used for driving the pushing ring to move on the inner wall of the packing flange, and therefore the effect of pressing the sealing packing is achieved. The sealing assembly is used for regulating and controlling the opening and closing of the sealing pipe, when the sealing pipe is closed, the sealing filler in the cavity cannot enter the filling cavity, and when the sealing pipe is opened, the pushing ring is moved to enable the sealing filler to enter the filling cavity through the sealing pipe.

The present invention may be further configured in a preferred embodiment as: the driving assembly comprises a rotating handle, external threads are arranged on the circumferential surface of the pushing ring, internal threads are arranged on the inner wall of the packing flange, the pushing ring is connected in the packing flange in a threaded mode, and the rotating handle is fixedly connected to the surface, far away from the gland flange, of the pushing ring.

By adopting the technical scheme, when the handle is rotated in the forward or reverse direction, the pushing ring can be screwed in or out along the thread on the inner wall of the packing flange, and the sealing packing in the cavity can be pressed when the pushing ring is screwed in.

The present invention may be further configured in a preferred embodiment as: the sealing assembly comprises a sliding column, a sliding hole is formed in the pushing ring, and the sliding column is connected in the sliding hole in a sliding mode; one end of the sliding column penetrates through the filler pipe and extends into the filling cavity, and the outer diameter of the sliding column is smaller than the inner diameter of the filler pipe; the end part of the sliding column close to the filling pipe is fixedly connected with a sealing disc, and the diameter of the sealing disc is larger than the inner diameter of the filling pipe.

Through adopting above-mentioned technical scheme, the slip hole supplies the slip post to slide wherein, when the slip post removed to the packing intracavity, the sealed dish of slip post tip removed to the packing intracavity to make the filled tube open, the rotating promotes the ring and oppresses the cavity this moment and can make the sealing filler get into the packing intracavity, realizes supplementing the sealing filler in the packing intracavity. The pulling slip post makes the slip post move outside the packing chamber, moves the mouth of pipe that covers the filled tube to the surface of sealed dish when sealed dish to close the mouth of pipe of filled tube, realized the control of opening and close the mouth of pipe of filled tube.

The present invention may be further configured in a preferred embodiment as: the filling pipe is internally provided with a return spring, two ends of the return spring are respectively connected with the side surface of the sliding column and the inner wall of the filling pipe, and when the return spring is in a natural state, the sealing disc is abutted against the filling pipe to seal an opening of the filling pipe, so that the one-way conveying of the sealing filler from the cavity to the filling cavity is ensured.

Through adopting above-mentioned technical scheme, reset spring plays the effect that resets to the post that slides, promotes the post that slides and makes the filled tube open the back, stops to promote the post that slides, and the post that slides can reply to sheltering from the filled tube mouth of pipe position under reset spring's restoring force, is convenient for reach the mouth of pipe realization closed effect to the filled tube.

The present invention may be further configured in a preferred embodiment as: the end edge that the filled tube is close to sealed dish is equipped with the inserted sheet, the sealed dish has seted up the inserting groove near the surface of filled tube, the inserted sheet is pegged graft with the inserting groove and is cooperated.

Through adopting above-mentioned technical scheme, the inserting groove supplies the inserted sheet to peg graft in wherein, when the inserted sheet inserted in the inserting groove, the mouth of pipe of filler pipe was sheltered from completely to sealed dish, guarantees that sealed dish can not misplace or squint when sheltering from the filler pipe.

The present invention may be further configured in a preferred embodiment as: the side of slip post is equipped with the guide block, the guide way has been seted up to the inner wall of filled tube, the guide way is seted up along the length direction of filled tube, guide block sliding connection is in the guide way.

Through adopting above-mentioned technical scheme, the cooperation of guide block and guide way plays the effect of guide to sliding of sliding column, makes the alignment that insertion piece and inserting groove can be better under the guide of guide block and guide way.

The present invention may be further configured in a preferred embodiment as: the gland flange is provided with a plurality of gland flanges, the gland flanges are arranged on the gland flanges, and the gland flanges are arranged on the gland flanges.

By adopting the technical scheme, the plurality of filler pipes are circumferentially distributed on the surface of the filler flange, so that the sealing filler supplemented into the filling cavity from the cavity can enter more uniformly.

The present invention may be further configured in a preferred embodiment as: and the sliding columns are fixedly connected with linkage rings.

Through adopting above-mentioned technical scheme, the setting up of even rotating ring makes and can drive a plurality of slip posts and remove simultaneously when promoting even rotating ring, makes the removal to the slip post more convenient.

To sum up, the utility model discloses a following at least one useful technological effect:

the rotating handle is rotated to enable the pushing ring to move towards the direction close to the gland flange, so that the effect of pressing the sealing filler in the cavity is achieved, and the sealing filler is pressed into the filling cavity from the cavity, so that the sealing filler leaked in the filling cavity is conveniently supplemented;

the sliding column is pushed into the filling cavity or pulled out of the filling cavity, so that the opening of the filling pipe is opened or closed, and the opening and closing of the filling pipe are controlled.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is an enlarged partial schematic view of portion A of FIG. 1;

fig. 3 is a schematic diagram of the structure of the present invention.

Reference numerals: 1. rotating the tube; 2. a rotating base; 3. rotating the flange; 4. a gland flange; 5. filling the cavity; 6. sealing and filling; 7. a filler flange; 8. a filler tube; 9. a filler hole; 10. a push ring; 11. a cavity; 12. rotating the handle; 13. a sliding post; 14. a slide hole; 15. sealing the disc; 16. a return spring; 17. a plug-in sheet; 18. inserting grooves; 19. a guide block; 20. a guide groove; 21. a link ring; 22. a transverse groove; 23. connecting blocks; 24. fixing the bolt; 25. fixing the spring; 26. fixing grooves; 27. and (5) fixing the column.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses a thrust-free rotary compensator is used to pipeline, including swivel pipe 1 and roating seat 2, in swivel pipe 1 cover was located roating seat 2, 2 one sides of roating seat were equipped with rotating flange 3, and the cover is equipped with gland flange 4 on the swivel pipe 1. The gland flange 4 and the rotating flange 3 are fixed by fixing bolts 24. A filling cavity 5 is reserved among the rotary flange 3, the rotary seat 2 and the rotary pipe 1, and a sealing filler 6 is arranged in the filling cavity 5. In the process of using the rotary compensator, the rotary pipe 1 rotates in the rotary seat 2 due to the expansion caused by heat and contraction caused by cold of the pipeline, friction is generated between the rotary pipe 1 and the sealing filler 6 in the rotating process, and the probability of leakage of the sealing filler 6 is high after long-time abrasion.

Referring to fig. 3, the rotating pipe 1 is sleeved with a packing flange 7, and the packing flange 7 is located on the other side of the gland flange 4 away from the rotating flange 3. A plurality of transverse grooves 22 are formed in the outer side pipe wall of the rotating pipe 1, the transverse grooves 22 are circumferentially distributed on the cylindrical pipe wall of the rotating pipe 1, and the transverse grooves 22 are formed in the length direction of the rotating pipe 1. Fixedly connected with a plurality of connecting blocks 23 on the inside wall of filler flange 7, connecting block 23 and cross slot 22 are the cooperation of sliding. The end of the transverse groove 22 remote from the gland flange 4 extends through the end face of the rotary pipe 1, so that the packing flange 7 can slide down from the rotary pipe 1, thereby realizing the detachable connection of the packing flange 7. The packing flange 7 removed from the rotary pipe 1 facilitates cleaning and replenishment of the sealing packing 6 in the cavity 11.

The fixed slot 26 has been seted up on the lateral wall of rotatory pipe 1, the length direction of fixed slot 26 and transverse groove 22 intercommunication and fixed slot 26 is perpendicular with transverse groove 22, sliding connection has fixed column 27 in the fixed slot 26, the tank bottom of fixed slot 26 is equipped with fixed spring 25, fixed spring 25's both ends respectively with the tank bottom of fixed slot 26 and the tip fixed connection of fixed column 27, when fixed spring 25 was in natural state, fixed column 27 was located and blocks the gliding position of connecting block 23. Thereby preventing the connecting block 23 from sliding out of the transverse groove 22 and realizing the fixation of the packing flange 7.

The surface that gland flange 4 is close to filler flange 7 is equipped with filler pipe 8, has seted up filler hole 9 on the gland flange 4, and filler hole 9 and filler pipe 8 are pegged graft and are cooperated, and filler flange 7 is hopper-shaped, and the opening has been seted up on the surface that gland flange 4 is kept away from to filler flange 7, is equipped with in the filler flange 7 and pushes away the ring 10, pushes away and forms inclosed cavity 11 between ring 10, the filler flange 7, is equipped with sealing filler 6 in the cavity 11, and filler pipe 8 communicates with cavity 11. The filling pipe 8 is used for communicating the cavity 11 with the filling cavity 5, so that the sealing filler 6 in the cavity 11 can enter the filling cavity 5 along the filling pipe 8, and the sealing filler 6 lost in the filling cavity 5 is supplemented.

The pushing ring 10 is provided with a driving assembly, and the pushing ring 10 moves along the inner wall of the packing flange 7 through the driving assembly so as to press the sealing packing 6 in the cavity 11 to enter the filling cavity 5 from the packing pipe 8; and a sealing assembly is arranged in the filling pipe 8, and the opening and closing of the filling pipe 8 are controlled through the sealing assembly. The driving assembly comprises a rotating handle 12, external threads are arranged on the circumferential surface of the pushing ring 10, internal threads are arranged on the inner wall of the packing flange 7, the pushing ring 10 is connected in the packing flange 7 in a threaded mode, and the rotating handle 12 is fixedly connected to the surface, far away from the gland flange 4, of the pushing ring 10. When the rotating handle 12 is rotated, the rotating handle 12 drives the pushing ring 10 fixedly connected with the rotating handle 12 to rotate along the internal thread on the inner wall of the filling flange 7, and the pushing ring 10 is screwed in or out in the process of rotating the rotating handle 12 in the forward direction or the reverse direction. When the pushing ring 10 is screwed into the inner wall of the packing flange 7, the pushing ring 10 presses the sealing packing 6 in the cavity 11, and the extruded sealing packing 6 enters the packing cavity 5 through the packing tube 8, so that the portable supplement of the sealing packing 6 in the packing cavity 5 is realized. The staff need not to all unscrew a plurality of nuts on gland flange 4 and take gland flange 4 off and just can replenish the sealing filler 6 of the loss in filling chamber 5. Convenient and fast has practiced thrift the human cost greatly, makes the maintenance of rotation compensator convenient and fast more.

The sealing assembly comprises a sliding column 13, a sliding hole 14 is formed in the pushing ring 10, and the sliding column 13 is connected in the sliding hole 14 in a sliding mode; one end of the sliding column 13 penetrates through the filler pipe 8 and extends into the filling cavity 5, and the outer diameter of the sliding column 13 is smaller than the inner diameter of the filler pipe 8; the end part of the sliding column 13 close to the filling pipe 8 is fixedly connected with a sealing disc 15, and the diameter of the sealing disc 15 is larger than the inner diameter of the filling pipe 8. The sliding column 13 can slide in the sliding hole 14, the sliding column 13 drives the sealing disc 15 at the end of the sliding column 13 to move in the moving process, when the sealing disc 15 abuts against the opening of the filler pipe 8, the sealing disc 15 can completely shield the pipe orifice of the filler pipe 8 because the outer diameter of the sealing disc 15 is larger than that of the filler pipe 8, so that the sealing filler 6 in the cavity 11 cannot enter the filling cavity 5; when the gland plate 15 is no longer in abutment with the filler tube 8, leaving a gap between the gland plate 15 and the filler tube 8 and the diameter of the sliding column 13 being smaller than the internal diameter of the filler tube 8, the gland packing 6 located in the cavity 11 can now enter the packing chamber 5 through the mouth of the filler tube 8 under the pressure of the push ring 10. The opening and closing of the pipe orifice of the filler pipe 8 are realized through the sealing component.

A return spring 16 is arranged in the filling pipe 8, two ends of the return spring 16 are respectively connected with the side surface of the sliding column 13 and the inner wall of the filling pipe 8, and when the return spring 16 is in a natural state, the sealing disc 15 is abutted against the filling pipe 8 so as to seal the opening of the filling pipe 8. Reset spring 16 plays the effect that resets to sliding column 13, promotes sliding column 13 and makes the filled tube 8 open the back, stops to promote sliding column 13, and sliding column 13 can reply to sheltering from filled tube 8 mouth of pipe position under reset spring 16's restoring force, is convenient for reach the effect of realizing the closure to filled tube 8's mouth of pipe.

The end edge of the packing tube 8 close to the sealing disc 15 is fixedly connected with an inserting sheet 17, the surface of the sealing disc 15 close to the packing tube 8 is provided with an inserting groove 18, and the inserting sheet 17 is in inserting fit with the inserting groove 18. The shape of the insertion pieces 17 is an arc-shaped sheet, the insertion pieces 17 are two, and the two insertion pieces 17 are arranged circumferentially. When sealing the mouth of pipe of filler pipe 8, inserting piece 17 has realized sealing the mouth of pipe of filler pipe 8 in inserting groove 18, and the setting up of inserting piece 17 and inserting groove 18 makes the inseparabler that filler pipe 8 can be closed, thereby prevents that the sealed circumstances that 15 and the mouth of pipe of filler pipe 8 do not align and lead to the sealed effect to reduce from taking place.

The side of sliding column 13 is fixedly connected with guide block 19, and guide way 20 has been seted up to the inner wall of filled tube 8, and guide way 20 is seted up along the length direction of filled tube 8, and guide block 19 sliding connection is in guide way 20. The two guide blocks 19 are respectively arranged on the side surfaces of the sliding column 13, and the two guide blocks 19 are arranged on the same straight line. Two guide grooves 20 are provided, and the two guide blocks 19 are respectively matched with the two guide grooves 20 in a sliding manner. The cooperation of the guide block 19 and the guide groove 20 has a guiding effect on the sliding movement of the sliding column 13, and the insertion piece 17 and the insertion groove 18 can be better aligned under the guiding of the guide block 19 and the guide groove 20.

The packing tubes 8 are multiple, the packing tubes 8 are circumferentially distributed on the surface, close to the gland flange 4, of the packing flange 7, the sliding holes 14 formed in the pushing ring 10 are multiple, and the sliding columns 13 are arranged in the sliding holes 14. The arrangement of the multiple filling pipes 8 can enable the multiple filling pipes 8 to simultaneously supplement the sealing filler 6 into the filling cavity 5 in the process of rotating the pushing ring 10, and the multiple filling pipes 8 are circumferentially arranged on the filling flange 7 to enable the filling pipes 8 to uniformly fill the sealing filler 6 into the filling cavity 5.

Fixedly connected with even rotating ring 21 on a plurality of sliding column 13, even rotating ring 21's setting makes and can drive a plurality of sliding column 13 and remove simultaneously when promoting even rotating ring 21, makes the removal to sliding column 13 more convenient.

The implementation principle of the embodiment is as follows: when replenishing the seal packing 6 in the packing chamber 5, inwards promote even rotating ring 21, even rotating ring 21 drives a plurality of slip posts 13 and removes in to packing chamber 5, slip post 13 removes the sealed dish 15 that drives slip post 13 tip and removes, make sealed dish 15 remove to the position that does not with the filler pipe 8 butt, rotation handle 12, push ring 10 removes to packing flange 7 along the screw thread, the in-process that pushes away ring 10 and removes plays the oppression effect to the seal packing 6 in the cavity 11, the extruded seal packing 6 is replenished the seal packing 6 in packing chamber 5 in getting into packing chamber 5 from cavity 11.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a thrust-free rotary compensator for pipeline, includes swivel mount (1) and roating seat (2), swivel mount (2) are located to swivel mount (1) cover, roating seat (2) one side is equipped with rotating flange (3), the cover is equipped with gland flange (4) on swivel mount (1), leave between rotating flange (3), roating seat (2) and swivel mount (1) and fill chamber (5), be equipped with sealing filler (6), its characterized in that in filling chamber (5): the rotary pipe (1) is sleeved with a packing flange (7), and the packing flange (7) is positioned on the other side, away from the rotary flange (3), of the gland flange (4); a packing tube (8) is arranged on the surface, close to the gland flange (4), of the packing flange (7), a packing hole (9) is formed in the gland flange (4), the packing hole (9) is in plug fit with the packing tube (8), the packing flange (7) is bucket-shaped, an opening is formed in the surface, far away from the gland flange (4), of the packing flange (7), a pushing ring (10) is arranged in the packing flange (7), a sealed cavity (11) is formed between the pushing ring (10) and the packing flange (7), sealing packing (6) is arranged in the cavity (11), and the packing tube (8) is communicated with the cavity (11); the pushing ring (10) is provided with a driving assembly, and the pushing ring (10) moves along the inner wall of the packing flange (7) through the driving assembly so as to press the sealing packing (6) in the cavity (11) to enter the packing cavity (5) from the packing pipe (8); and a sealing assembly is arranged in the filling pipe (8), and the opening and closing of the filling pipe (8) are controlled through the sealing assembly.

2. The thrust-free rotary compensator for pipes according to claim 1, wherein: the driving assembly comprises a rotating handle (12), external threads are arranged on the circumferential surface of the pushing ring (10), internal threads are arranged on the inner wall of the packing flange (7), the pushing ring (10) is connected in the packing flange (7) in a threaded mode, and the rotating handle (12) is fixedly connected to the surface, far away from the gland flange (4), of the pushing ring (10).

3. The thrust-free rotary compensator for pipes according to claim 1, wherein: the sealing assembly comprises a sliding column (13), a sliding hole (14) is formed in the pushing ring (10), and the sliding column (13) is connected in the sliding hole (14) in a sliding mode; one end of the sliding column (13) penetrates through the filler pipe (8) and extends into the filling cavity (5), and the outer diameter of the sliding column (13) is smaller than the inner diameter of the filler pipe (8); the end part of the sliding column (13) close to the filler pipe (8) is fixedly connected with a sealing disc (15), and the diameter of the sealing disc (15) is larger than the inner diameter of the filler pipe (8).

4. The thrust-free rotary compensator for pipes according to claim 3, wherein: be equipped with reset spring (16) in filled tube (8), the side of slip post (13) and the inner wall of filled tube (8) are connected respectively to reset spring (16) both ends, when reset spring (16) are in natural state, sealed dish (15) butt in filled tube (8) thereby make the opening of filled tube (8) sealed.

5. The thrust-free rotary compensator for pipes according to claim 4, wherein: the end edge that filler tube (8) are close to sealed dish (15) is equipped with insertion piece (17), jack groove (18) have been seted up on the surface that sealed dish (15) are close to filler tube (8), plug piece (17) and jack groove (18) are pegged graft the cooperation.

6. The thrust-free rotary compensator for pipes according to claim 5, wherein: the side of the sliding column (13) is provided with a guide block (19), the inner wall of the filler pipe (8) is provided with a guide groove (20), the guide groove (20) is formed along the length direction of the filler pipe (8), and the guide block (19) is connected in the guide groove (20) in a sliding manner.

7. The thrust-free rotary compensator for pipes according to claim 3, wherein: the packing tube (8) are a plurality of, and are a plurality of packing tube (8) circumference distributes on packing flange (7) is close to the surface of gland flange (4), sliding hole (14) of seting up on propelling movement ring (10) are a plurality of, and are a plurality of all be equipped with slip post (13) in sliding hole (14).

8. The thrust-free rotary compensator for pipes according to claim 7, wherein: and a plurality of sliding columns (13) are fixedly connected with a linkage ring (21).