CN113864561B

CN113864561B - Spacing compensation expansion bend convenient to adjust

Info

Publication number: CN113864561B
Application number: CN202111253532.2A
Authority: CN
Inventors: 赵敏; 赵光胜; 王从伟; 宋永启; 杨光
Original assignee: Tongling Tianhai Flow Control Co ltd
Current assignee: Tongling Tianhai Flow Control Co ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2023-05-16
Anticipated expiration: 2041-10-27
Also published as: CN113864561A

Abstract

The invention provides a limit compensation expansion device convenient to adjust. The spacing compensation expansion bend of convenient regulation includes: a first pipeline and a second pipeline; the flange I and the flange II are fixedly sleeved on the pipeline I and the pipeline II respectively; the sealing ring is fixedly arranged on the inner wall of the first pipeline, and the second pipeline penetrates through the sealing ring and is in contact with the inner wall of the sealing ring; the lantern ring is rotatably sleeved on the first pipeline; the ring groove I is arranged on the lantern ring; the screwing cover is movably sleeved on the second pipeline, and one side of the screwing cover extends into the first annular groove and is screwed with the inner wall of the first annular groove. The limit compensation telescopic device convenient to adjust has the advantages of being capable of conveniently performing telescopic adjustment, improving installation efficiency and prolonging sealing performance.

Description

Spacing compensation expansion bend convenient to adjust

Technical Field

The invention relates to the technical field of flange compensators, in particular to a limit compensation telescopic device convenient to adjust.

Background

The flange expansion compensator is a new product for connecting equipment such as pumps, valves, pipelines and the like with the pipelines, has a certain displacement, is convenient to install and can bear the axial pressure of the pipelines, so that the flange expansion compensator can be adjusted according to the field installation size during installation and maintenance, not only improves the working efficiency during operation, but also plays a certain role in protecting the pipeline equipment such as the pumps, the valves and the like, and can be divided into a single flange compensator and a double flange compensator according to different types, and can be selected according to actual conditions.

However, when the traditional flange compensator is used, the traditional flange compensator is found to be continuously screwed by utilizing the matching of a plurality of long screws and nuts on the traditional flange compensator when in telescopic adjustment, and finally the screws are tightly fixed through two opposite nuts, so that the telescopic adjustment work is completed.

Therefore, it is necessary to provide a new limit compensation expansion device with convenient adjustment to solve the above technical problems.

Disclosure of Invention

The invention solves the technical problem of providing the limit compensation telescopic device which can simply and conveniently carry out telescopic adjustment, improve the installation efficiency and prolong the sealing performance and is convenient to adjust.

In order to solve the technical problems, the limit compensation telescopic device convenient to adjust provided by the invention comprises: a first pipeline and a second pipeline;

the flange I and the flange II are fixedly sleeved on the pipeline I and the pipeline II respectively;

the sealing ring is connected between the first pipeline and the second pipeline in a sealing way;

a collar; the gear is meshed with the toothed ring, and the inner side of the lantern ring is rotationally connected with the pipeline through a connecting piece;

the ring groove I is arranged on the lantern ring;

the spiral connection cover is movably sleeved on the second pipeline, and the other end of the spiral connection cover extends into the first annular groove and is in spiral connection with the inner wall of the first annular groove;

the two limiting slide bars are fixedly arranged on the flange I;

the two connecting blocks are respectively and slidably arranged on the two limiting slide bars;

the two fixedly connecting rods are respectively and fixedly arranged on the two connecting blocks, and one ends of the two fixedly connecting rods are fixedly connected with the flange II;

the second ring groove is formed in the sealing ring;

and the clamping ring is arranged in the second annular groove, and one end of the clamping ring extends out of the second annular groove.

Preferably, a box body is fixedly arranged at one end of the screwing cover, an adjusting screw is rotatably arranged in the box body, a bridging plate is arranged on the adjusting screw in a threaded manner, the top of the bridging plate is in sliding connection with the inner wall of the top of the box body, a connecting sleeve is movably sleeved on the second pipeline, the connecting sleeve penetrates through one end of the screwing cover and is fixedly connected with the clamping ring, and the bottom of the bridging plate is fixedly connected with the connecting sleeve.

Preferably, a plurality of annular array distributed top heads are fixedly arranged on the inner wall of the clamping ring, which is close to the second pipeline, and the top heads are tightly contacted with the inner wall of the second annular groove.

Preferably, the end of the screwing cover, which is close to the second flange, is fixedly provided with two cross bars, and the end of the cross bars, which is far away from the screwing cover, is fixedly connected with the second flange.

Preferably, a plurality of positioning grooves distributed in an annular array along the circumferential direction are formed in the rotating shaft, a vertical plate is fixedly arranged on the first pipeline, the rotating shaft penetrates through the vertical plate and is rotationally connected with the vertical plate, a plugboard is fixedly arranged on the vertical plate, a positioning rod is slidably arranged on the plugboard, the bottom end of the positioning rod extends to the corresponding position in the positioning groove, a panel is fixedly arranged at the top end of the positioning rod, a movable plate is rotationally arranged on the panel, a first spring is sleeved on the positioning rod, one end of the first spring is fixedly connected with the plugboard, the other end of the first spring is fixedly connected with the panel, a limiting groove is formed in the top of the vertical plate, and a limiting block is fixedly arranged at the bottom of the movable plate and is matched with the limiting groove.

Preferably, a lining is arranged in the second pipeline, two filter screens are fixedly arranged in the lining, a third annular groove is formed in the second flange, a fixing ring is arranged in the third annular groove, the inner wall of the fixing ring is fixedly connected with the outer ring of the lining, two blind grooves are formed in the third annular groove, two insert rods are arranged in the blind grooves, and one end of each insert rod extends out of the third annular groove and is fixedly connected with the fixing ring.

Preferably, the round groove is all offered to the plunger side, two movable chamber along flange two radial extension have been offered on the flange two, and every movable intracavity is all fixed mounting has two slide bars, and slidable mounting has the arm-tie on two slide bars, the terminal fixed mounting of arm-tie has the round bar, the one end of round bar extends to corresponding round groove from movable chamber.

Preferably, one end of the movable cavity is communicated with the flange, and a second spring is connected between one side of the pull plate, which is away from the circular groove, and the movable cavity.

Preferably, a sealing ring is fixedly installed in the third annular groove, the sealing ring is in contact with the fixing ring, and the two plunger rods are located in the sealing ring.

Compared with the related art, the limit compensation telescopic device convenient to adjust has the following beneficial effects:

the invention provides a limit compensation expansion joint convenient to adjust, which is characterized in that a sleeve ring and a rotary joint cover are arranged, under the meshing of a gear and a toothed ring, the expansion adjustment work between a first pipeline and a second pipeline can be completed only by rotating a rotating shaft, and the rotating shaft can be clamped by utilizing the clamping of a positioning rod and a positioning groove, so that the position after expansion adjustment cannot deviate, the accuracy is improved, in addition, a ring groove II is propped against the inner wall of a circle close to the second pipeline by utilizing a plug to deform, so that a sealing ring can be tightly contacted with the outer wall of the second pipeline, and when the sealing ring is worn, the deformation can compensate the wear amount, so that the sealing ring can ensure the sealing performance with the second pipeline for a long time.

Drawings

FIG. 1 is a schematic front view of a first embodiment of a limit compensation retractor with convenient adjustment according to the present invention;

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

FIG. 3 is an enlarged schematic view of portion B shown in FIG. 1;

FIG. 4 is a schematic side view of the snap ring in the first embodiment of the conveniently adjustable limit compensation telescopic device according to the present invention;

FIG. 5 is a schematic front view of a second embodiment of a conveniently adjustable limit compensation retractor of the present invention;

fig. 6 is an enlarged schematic view of a portion C shown in fig. 5.

Reference numerals in the drawings: 1. a first pipeline; 2. a second pipeline; 3. a first flange; 4. a second flange; 5. a seal ring; 6. a collar; 7. a first ring groove; 8. screwing the cover; 9. a slide limiting rod; 10. connecting blocks; 11. fixing a connecting rod; 12. a toothed ring; 13. a rotating shaft; 14. a gear; 15. a case body; 16. adjusting a screw; 17. a clasp; 18. connecting sleeves; 19. a bridging plate; 20. a plug; 21. a second ring groove; 22. a lining; 23. a filter screen; 24. a third ring groove; 25. a fixing ring; 26. a blind groove; 27. the device comprises a plunger, 28, a vertical plate, 29, a plugboard, 30, a positioning rod, 31, a panel, 32, a movable plate, 33 and a first spring.

Detailed Description

The invention will be further described with reference to the drawings and embodiments.

First embodiment

Referring to fig. 1 to 4 in combination, in a first embodiment of the present invention, a limit compensation retractor with convenient adjustment includes: a first pipeline 1 and a second pipeline 2; the flange I3 and the flange II 4 are fixedly sleeved on the pipeline I1 and the pipeline II 2 respectively; the sealing ring 5 is fixedly arranged on the inner wall of the first pipeline 1, the sealing ring 5 is connected between the first pipeline 1 and the second pipeline 2 in a sealing way, the whole sealing ring 5 is longer, the shape of the sealing ring is matched with that of the inner wall of the first pipeline 1, and the sealing ring 5 can be tightly contacted with the second pipeline 2 while being fixed on the inner wall of the first pipeline 1, so that good sealing performance is provided; the ring-shaped pipeline comprises a ring-shaped sleeve 6, wherein a toothed ring 12 is fixedly sleeved on the outer side of the ring-shaped sleeve 6, a rotating shaft 13 is arranged on the first pipeline 1, a gear 14 is fixedly sleeved on the rotating shaft 13, the gear 14 is meshed with the toothed ring 12, and the inner side of the ring-shaped sleeve is rotationally connected with the pipeline through a connecting piece; the annular groove I7 is formed in the lantern ring 6; the spiral connection cover 8 is movably sleeved on the second pipeline 2 at one end, the other end of the spiral connection cover 8 extends into the first annular groove 7 and is in spiral connection with the inner wall of the first annular groove 7, a male thread is formed on the inner annular wall of the first annular groove 7, a female thread is formed on the inner side wall of the spiral connection cover 8, the male thread and the female thread are in spiral connection, the tooth distance is small, and the telescopic adjustment is more accurate; the two limiting slide bars 9 are fixedly arranged on the flange I3; the two connecting blocks 10 are respectively and slidably arranged on the two limiting slide rods 9, and limit can be provided for the pipeline two 2 through the sliding fit of the limiting slide rods 9 and the connecting blocks 10, so that the pipeline two can only perform stable horizontal telescopic movement when the pipeline one 1 is fixed; the two fixedly connecting rods 11 are respectively and fixedly arranged on the two connecting blocks 10, and one ends of the two fixedly connecting rods 11 are fixedly connected with the flange II 4; the second ring groove 21 is formed in the sealing ring 5; the clamping ring 17, the clamping ring 17 sets up in the annular second 21, the one end of clamping ring 17 extends to outside the annular second 21, the clamping ring 17 can insert in the annular second 21 to can provide a support from inside to outside for sealing washer 5, improve the closely degree of contact of sealing washer 5 and pipeline second 2.

The gear ring 12 is fixedly sleeved on the lantern ring 6, the rotating shaft 13 is arranged on the first pipeline 1, the gear 14 is fixedly sleeved on the rotating shaft 13, the gear 14 is meshed with the gear ring 12, the lantern ring 6 can be driven to rotate smoothly while the rotating shaft 13 is rotated by utilizing the meshing effect of the gear 14 and the gear ring 12, and therefore the screwing cover 8 can be slowly screwed out under the limitation of the slide limiting rod 9.

The one end fixed mounting who connects lid 8 soon has box body 15, and the bottom of box body 15 is established to the opening, can provide good activity space and orbit for joint board 19, adjusting screw 16 is installed to the box body 15 internal rotation, the last screw thread of adjusting screw 16 installs joint board 19, and adjusting screw 16 can form screw thread fit with joint board 19 to under the sliding relationship of joint board 19 self and box body 15 top inner wall, can drive adapter sleeve 18 and carry out horizontal migration, and then can take snap ring 17 out of or bring into annular second 21, the top of joint board 19 with the top inner wall sliding connection of box body 15, the movable sleeve is equipped with adapter sleeve 18 on pipeline second 2, and adapter sleeve 18 can form the slip of contact on pipeline second 2, thereby can further improve sealing performance, adapter sleeve 18 run through the one end of connect lid 8 soon and with snap ring 17 fixed connection, the bottom of joint board 19 with adapter sleeve 18 fixed connection.

The snap ring 17 is close to the inner wall of the second pipeline and fixedly provided with a plurality of annular array distributed plugs 20, the plugs 20 are in close contact with the inner wall of the second annular groove 21, and the adjacent two plugs 20 are closer to each other, so that tight and multiple distribution is formed in the snap ring 17, the side wall of the sealing ring 5 can be propped against the side wall of the second pipeline to the greatest extent, the contact between the sealing ring and the second pipeline is tighter, and the strongest sealing performance is guaranteed.

The screw joint cover 8 is close to two 4 one end fixed mounting of flange has two horizontal poles, the horizontal pole keep away from the one end of screw joint cover 8 with two 4 fixed connection of flange can carry out reliable position fixing with the screw joint cover 8 of activity setting on two 2 of pipeline through the horizontal pole, also can provide the restriction for it to can be with the smooth follow annular 7 of screw joint cover 8 unscrewing.

Offer a plurality of constant head tanks that are annular array distribution along circumference on the pivot 13, constant head tank quantity is more, and the distance is nearer between two adjacent constant head tanks, thereby can satisfy the rotation position of pivot 13 under a great deal of state, improve adaptability, fixed mounting has riser 28 on the first 1 of pipeline, pivot 13 run through the riser and with riser swivelling joint, fixed mounting has picture peg 29 on the riser, slidable mounting has locating lever 30 on the picture peg, the bottom of locating lever extends to corresponding in the constant head tank, utilize the grafting of locating lever and constant head tank, can block pivot 13 to can form reliable stable fixed position to flexible regulation's pipeline two 2, the top fixed mounting of locating lever has panel 31, just the last swivelling joint of panel has fly leaf 32, the cover is equipped with spring one 33 on the locating lever, one end of spring with picture peg fixed connection, the other end of spring one with panel fixed connection can provide an elasticity for the locating lever and stop block, thereby can limit the top and make the restriction piece under the free of setting up, can limit the restriction piece, can be restricted by the top, the restriction piece is taken out with the restriction, the top can be equipped with the restriction groove, and other is convenient.

In this embodiment:

when the second pipeline 2 is required to be pulled out of the first pipeline 1 for telescopic adjustment, the movable plate is lifted upwards, the positioning rod is pulled out of the positioning groove, the first pipeline 2 is in a stretching state, then the movable plate is rotated, the limiting block corresponds to the limiting groove, then the movable plate is slowly lowered, the limiting block is clamped into the limiting groove, the rotating shaft 13 at the moment loses limitation, then the rotating shaft 13 is rotated, the gear 14 can be driven to rotate, the collar 6 can be driven to rotate through the meshing of the gear 14 and the toothed ring 12, so that the second pipeline 2 can be gradually moved out of the first pipeline 1 by the rotary joint cover 8 under the sliding limitation of the two limiting rods 9 until the second pipeline 2 extends to a specified adjustment length, the movable plate is lifted again, the limiting block is separated from the limiting groove, the limiting block is rotated immediately, the movable plate is directly released, and the positioning rod is directly clamped into the positioning groove under the rebound tension of the first pipeline 9 to be clamped;

then the adjusting screw 16 is rotated clockwise, the connecting sleeve 18 is driven by the connecting plate 19 in threaded relation with the adjusting screw, the connecting sleeve moves along the direction of the clamping ring 17 towards the sealing ring 5 until the clamping ring 17 is inserted into the second annular groove 21, the top head 20 on the connecting sleeve is also inserted into the second annular groove 21, and the inner wall of the second annular groove 21 is propped against to deform, so that the subsequent operation and use can be performed.

the invention provides a limit compensation telescopic device convenient to adjust, which is characterized in that a lantern ring 6 and a screwed cover 8 are arranged, under the meshing of a gear 14 and a toothed ring 12, the telescopic adjustment work between a first pipeline 1 and a second pipeline 2 can be completed only by rotating a rotating shaft 13, and the rotating shaft 13 can be clamped by utilizing the clamping of a positioning rod and a positioning groove, so that the position after telescopic adjustment cannot deviate, the accuracy is improved, in addition, a ring groove two 21 is propped to deform close to the inner wall of a ring of a second pipeline 2 by utilizing a plug 20, so that a sealing ring 5 can be tightly contacted with the outer wall of the second pipeline 2, and when the sealing ring 5 is worn, the deformation can compensate the wear amount, so that the sealing ring 5 can ensure the sealing performance with the second pipeline 2 for a long time.

Second embodiment:

based on the convenient spacing compensation expansion bend of regulation that this application provided by first embodiment, this application's second embodiment proposes another convenient spacing compensation expansion bend of regulation, and the second embodiment is the preferred mode of first embodiment only, and the implementation of second embodiment does not exert an influence to the individual implementation of first embodiment.

The second embodiment of the present invention will be further described with reference to the drawings and embodiments

Referring to fig. 5-6 in combination, in the second embodiment of the present invention, the spacing compensation expansion joint with convenient adjustment further includes a liner 22, the liner 22 is disposed in the second pipeline 2, the liner 22 can be completely attached to the inner wall of the second pipeline 2, so as to ensure that the liquid can only pass through the liner 22, and ensure the thoroughness of the filtering operation, two filter screens 23 are fixedly mounted in the liner 22, the number of the two filter screens 23 decreases from left to right in sequence, so that the filtering can be performed in a layered manner, the filtering effect is improved, a third ring groove 24 is formed on the second flange 4, a fixing ring 25 is disposed in the third ring groove 24, the fixing ring 25 can be completely disposed in the third ring groove 24, so that no protrusion is formed on the second flange 4, the later installation and fixing work can not be prevented, the inner wall of the fixing ring 25 is fixedly connected with the outer ring of the liner 22, two blind grooves 26 are formed in the third ring groove 24, two insert rods 27 are respectively disposed in the blind grooves 26, one end of each insert rod 27 extends out of the third ring groove 24 and is fixedly connected with the fixing ring 25 and the same insert rod 25 through the fixing ring 25 and the fixing ring 25.

Round grooves are formed in the side faces of the two inserting rods 27, two movable cavities extending along the radial direction of the flange two are formed in the flange two 4, two sliding rods are fixedly mounted in each movable cavity, the inserting rods 27 can be firmly fixed in the blind grooves 26 through the arrangement of the sliding rods and the round grooves, accordingly, the lining 22 can be conveniently mounted, two corresponding sliding plates are mounted on the sliding rods in a sliding mode, two pull plates are arranged in total, round rods are fixedly mounted on the two pull plates, and one end of each round rod extends from the corresponding movable cavity to the corresponding round groove.

Two fluting has been seted up on the flange two 4, two the fluting respectively with two the activity chamber is linked together, and two one side of arm-tie all extends to corresponding in the fluting, the fluting is enough big, can satisfy the staff and go deep into wherein with the finger to conveniently stimulate the arm-tie, two the equal fixed mounting in one side that the arm-tie kept away from each other has spring two, two the one end that the spring is kept away from each other respectively with two one side inner wall fixed connection that the activity chamber kept away from each other, spring two can provide self-adaptation resilience force for the pole, makes when the final position is looked up to the inserted bar 27 when the installation, can bring it into the circular slot automatically under the effect of spring two, brings convenience for people's installation work.

The third ring groove 24 is internally and fixedly provided with a sealing ring, the sealing ring is contacted with the fixed ring 25, the two plunger rods 27 are positioned in the sealing ring, and the sealing ring is positioned between the fixed ring 25 and one side inner wall of the third ring groove 24, so that the overall sealing performance can be ensured.

When the novel round rod type pipeline is used, when liquid enters from the second pipeline 2, the liquid firstly passes through the two filter screens 23, so that impurities in the liquid can be filtered and intercepted, purity of the liquid in the transportation process can be improved, equipment is effectively prevented from being damaged due to impurity particles, when the filter screens 23 are required to be cleaned or replaced, the two pull plates are pulled in the directions away from each other, the two round rods can move away from each other, so that the corresponding round grooves are separated, the second spring is in a compressed state, then the fixing ring 25 is pulled out from the third annular groove 24, the pull plates are loosened, corresponding operation can be performed, the fixing ring 25 is inserted into the third annular groove 24, the inner lining 22 is also inserted into the second pipeline 2, meanwhile, when the insert rod 27 is inserted into the corresponding blind groove 26, the round rod is firstly jacked up, the second spring is compressed until the insert rod 27 is inserted into the round groove, and the round rod is directly inserted into the round groove under the elastic action of the second spring at the moment, and therefore the installation work is completed.

The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. Spacing compensation expansion bend convenient to adjust, its characterized in that includes:

a first pipeline (1) and a second pipeline (2);

the flange I (3) and the flange II (4) are fixedly sleeved on the pipeline I (1) and the pipeline II (2) respectively;

the sealing ring (5), the said sealing ring (5) is connected between first pipeline (1) and second pipeline (2) sealingly;

a collar (6); the gear ring (12) is fixedly sleeved on the outer side of the lantern ring (6), the first pipeline (1) is provided with a rotating shaft (13), the rotating shaft (13) is fixedly sleeved with a gear (14), the gear (14) is meshed with the gear ring (12), and the inner side of the lantern ring is rotationally connected with the pipeline through a connecting piece;

the annular groove I (7), the annular groove I (7) is arranged on the lantern ring (6);

the spiral connection cover (8), one end of the spiral connection cover (8) is movably sleeved on the second pipeline (2), and the other end of the spiral connection cover (8) extends into the first annular groove (7) and is in spiral connection with the inner wall of the first annular groove (7);

the two limiting slide bars (9) are fixedly arranged on the first flange (3);

the two connecting blocks (10), the two connecting blocks (10) are respectively and slidably arranged on the two limiting slide bars (9);

the two fixing rods (11), the two fixing rods (11) are respectively and fixedly arranged on the two connecting blocks (10), and one ends of the two fixing rods (11) are fixedly connected with the flange II (4);

the second ring groove (21), the second ring groove (21) is arranged on the sealing ring (5);

and the clamping ring (17), the clamping ring (17) is arranged in the second annular groove (21), and one end of the clamping ring (17) extends out of the second annular groove (21).

2. The spacing compensation expansion joint convenient to adjust according to claim 1, wherein one end of the screwing cover (8) is fixedly provided with a box body (15), an adjusting screw (16) is rotatably arranged in the box body (15), a bridging plate (19) is arranged on the adjusting screw (16) in a threaded manner, the top of the bridging plate (19) is slidably connected with the inner wall of the top of the box body (15), a connecting sleeve (18) is movably sleeved on the second pipeline (2), the connecting sleeve (18) penetrates through one end of the screwing cover (8) and is fixedly connected with the clamping ring (17), and the bottom of the bridging plate (19) is fixedly connected with the connecting sleeve (18).

3. The limit compensation telescopic device convenient to adjust according to claim 1, wherein a plurality of plugs (20) distributed in an annular array are fixedly arranged on the inner wall of the clamping ring (17) close to the second pipeline, and the plugs (20) are in close contact with the inner wall of the second annular groove (21).

4. The limit compensation telescopic device convenient to adjust according to claim 1, wherein two cross bars are fixedly arranged at one end of the screwing cover (8) close to the second flange (4), and one end of the cross bars away from the screwing cover (8) is fixedly connected with the second flange (4).

5. The spacing compensation expansion joint convenient to adjust according to claim 1, wherein a plurality of positioning grooves distributed in an annular array along the circumferential direction are formed in the rotating shaft (13), a vertical plate (28) is fixedly installed on the first pipeline (1), the rotating shaft (13) penetrates through the vertical plate and is rotationally connected with the vertical plate, a plugboard (29) is fixedly installed on the vertical plate, a positioning rod (30) is slidably installed on the plugboard, the bottom end of the positioning rod extends into the corresponding positioning groove, a panel (31) is fixedly installed on the top end of the positioning rod, a movable plate (32) is rotatably installed on the panel, a first spring (33) is sleeved on the positioning rod, one end of the first spring is fixedly connected with the plugboard, a limiting groove is formed in the top of the vertical plate, a limiting block is fixedly installed at the bottom of the movable plate, and the limiting block is matched with the limiting groove.

6. The spacing compensation expansion joint convenient to adjust according to claim 1, wherein, be equipped with inside lining (22) in pipeline two (2), inside lining (22) internal fixation has two filter screens (23), annular third (24) have been seted up on flange two (4), be equipped with solid fixed ring (25) in annular third (24), gu fixed ring (25) inner wall with the outer lane fixed connection of inside lining (22), two blind groove (26) have been seted up in annular third (24), two all be equipped with in blind groove (26) inserted bar (27), the one end of inserted bar (27) extends to outside annular third (24) and with solid fixed ring (25) fixed connection.

7. The spacing compensation expansion joint convenient to adjust according to claim 6, wherein round grooves are formed in the side faces of the inserting rods (27), two movable cavities extending along the radial direction of the second flange are formed in the second flange (4), two sliding rods are fixedly mounted in each movable cavity, pull plates are slidably mounted on the two sliding rods, round rods are fixedly mounted at the tail ends of the pull plates, and one ends of the round rods extend into the corresponding round grooves from the movable cavities.

8. The spacing compensation expansion joint with convenient adjustment according to claim 7, wherein one end of the movable cavity is externally communicated with the second flange (4), and a second spring is connected between one side of the pull plate, which is away from the circular groove, and the movable cavity.

9. The limit compensation telescopic device convenient to adjust according to claim 6, wherein a sealing ring is fixedly installed in the annular groove III (24), the sealing ring is contacted with the fixed ring (25), and the two plunger rods (27) are both positioned in the sealing ring.