A pipeline compensator

Abstract

The present invention relates to the field of pipeline compensators, and discloses a pipeline compensator, including a sleeve and a compensating tube, wherein the compensating tube is installed in the sleeve, a first compensation structure is arranged between the sleeve and the compensating tube, and second compensation structures are arranged at both ends of the sleeve. Connecting tubes are arranged at both ends of the sleeve through the first installation structure, and a sleeve fixed in the middle of the sleeve is provided with an intermediate sleeve. When a spring in the first compensation structure is damaged or fails to function normally after long-term use, a flip plate on the flip structure can be directly opened on the sleeve to replace the corresponding spring. In this way, the compensator can still be used normally, which reduces the cost. In addition, the flip plate closed on the sleeve can be fixed by using a first screw, and the overall firmness of the compensator is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline compensators, and in particular to a pipeline compensator. Background Art

[0002] Pipeline compensators are also called expansion joints or expansion joints. They are mainly used to compensate for the thermal expansion and contraction of pipelines caused by temperature changes. If the pipeline cannot expand or contract completely freely when the temperature changes, thermal stress will be generated in the pipeline. This stress must be considered in the pipeline design, otherwise it may cause the pipeline to rupture and affect normal production. As an important part of pipeline engineering, compensators play an important role in ensuring the long-term normal operation of pipelines.

[0003] The pipeline compensator in the prior art is used in combination with a compensation layer, a reset spring, a telescopic pad, a locking bolt and a locking nut. When the pipeline expands, it contracts upward under the action of the reset spring and the telescopic pad, which can prevent the pipeline from bursting due to failure to expand during expansion. At the same time, when the pipeline shrinks cold, the reset spring allows the pipeline to shrink in close contact with the compensation layer, achieving the effect of both expansion and contraction, thereby increasing the service life of the pipeline.

[0004] However, after long-term use, if the reset spring used for compensation breaks or fails to function normally, the pipeline compensator of the prior art needs to be replaced as a whole, which increases the cost. Therefore, there is room for improvement. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a pipeline compensator.

[0006] The present invention provides a pipeline compensator adopting the following technical solution:

[0007] A pipeline compensator comprises a casing and a compensating pipe, wherein the compensating pipe is installed in the casing, a first compensating structure is arranged between the casing and the compensating pipe, a second compensating structure is arranged at both ends of the casing, connecting pipes are arranged at both ends of the casing through the first installation structure, and an intermediate sleeve is arranged at a sleeve fixed in the middle of the casing;

[0008] The first compensation structure comprises a plurality of groups of springs arranged between the sleeve and the compensation tube, each of the springs being installed on the outside of the compensation tube through the second installation structure, the plurality of springs in each group being distributed at equal angles on the circumference of the compensation tube, and the sleeve being provided with an opening structure;

[0009] The opening structure includes a plurality of groups of arc grooves on both sides of the middle sleeve, each of the arc groove walls is provided with a through groove for replacing a spring, a fixing strip is connected between the middle sleeve and both ends of the sleeve, the fixing strip is located between each group of two arc grooves, two grooves are respectively provided on the fixing strip at positions corresponding to each arc groove, a fixing rod is connected between the groove walls at both ends of the groove, a movable sleeve on the fixing rod is provided with an opening plate, and a sealing plate is installed on the inner side of the opening plate.

[0010] Preferably, a first screw rod is movably passed between the two ends of the sleeve, nuts are tightened on both ends of the first screw rod passing through the sleeve, and a through hole is formed at one end of each flip-up plate away from the fixing rod.

[0011] Preferably, the second mounting structure includes a threaded block connected to one end of each spring close to the compensation tube, and a mounting seat is installed at a position corresponding to each threaded block on the outside of the compensation tube, and the threaded block is tightened in a threaded groove of the mounting seat.

[0012] Preferably, the first mounting structure includes a fixing seat installed on the intermediate sleeve at a position away from the fixing bar, the fixing seat is rotatably connected to a second screw, a fixed sleeve on one end of the second screw is provided with a turntable, a driving plate is provided on the second screw, the driving plate extends to both ends of the sleeve, a threaded groove for the second screw to pass through is provided in the middle of the driving plate, an insert plate is movably inserted into the position of the driving plate at both ends of the sleeve, one end of the insert plate is connected to the driving plate, a tightening structure is provided on the insert plate, an annular groove is provided on the part of the connecting pipe inserted into the sleeve, the other end of the insert plate is inserted into the annular groove, and a sealing structure is provided between the connecting pipe and the sleeve.

[0013] Preferably, the sealing structure includes a fixed sleeve fixedly installed on the inner wall of the sleeve near the end, and a first tightening sleeve is provided on the sleeve fixed at a position close to the fixed sleeve on the connecting pipe, and the first tightening sleeve is pressed against a first sealing ring on the side of the fixed sleeve, and an extrusion portion with an inclined surface is provided on the side surface of one end of the plug plate inserted into the annular groove.

[0014] Preferably, the clamping structure includes an inner groove opened on the inner wall of the sleeve at the plug plate, the plug plate movably passes through the inner groove, a first sealing strip fixedly mounted on the plug plate and clamped against the lower groove wall of the inner groove, a second sealing strip fixedly mounted on the plug plate at a position near the bottom end, and the first sealing strip and the second sealing strip are both in the shape of arc-shaped plates.

[0015] Preferably, the second compensation structure includes a bellows installed on both ends of the sleeve, a sleeve fixed on the connecting pipe is provided with a second tightening sleeve, the second tightening sleeve is pressed against the end face of the bellows, a third compensation structure is arranged between the bellows and the sleeve, the second tightening sleeve is pressed against the second sealing ring on the end face of the bellows.

[0016] Preferably, the third compensation structure includes a plurality of first U-shaped seats at the end of the bellows, a first fixed shaft is fixedly passed through the first U-shaped seat, a plurality of second U-shaped seats are installed on the end surface of the sleeve, a second fixed shaft is fixedly passed through the second U-shaped seat, a first curved plate is movably sleeved on the first fixed shaft, a second curved plate is movably sleeved on the second fixed shaft, each group of two first curved plates is rotatably connected to the second curved plates, a first torsion spring is sleeved at both ends of the first fixed shaft, the two ends of the first torsion spring are respectively connected to the inner wall of the first U-shaped seat and the first curved plate, a second torsion spring is sleeved at both ends of each of the second fixed shafts, the two ends of the second torsion spring are respectively connected to the second U-shaped seat and the second curved plate.

[0017] In summary, the present invention includes the following beneficial technical effects:

[0018] The present invention is provided with a first compensation structure, an opening structure and a first screw rod. When the spring in the first compensation structure is damaged or fails to function normally after long-term use, the opening plate on the opening structure can be directly opened on the sleeve to replace the corresponding spring. In this way, the compensator can still be used normally, reducing the cost. In addition, the first screw rod can be used to fix the opening plate closed on the sleeve, and the overall firmness of the compensator is also increased.

[0019] The present invention provides a second compensation structure and a third compensation structure at both ends of the casing, which can protect the pipeline from thermal expansion and contraction in the transverse direction, thereby improving the compensation and protection quality of the compensator.

[0020] The present invention is provided with a first mounting structure, a clamping structure and a sealing structure. The compensator can be installed on the connecting pipe by using a turntable on the first mounting structure to drive the rotation of the second screw, thereby replacing the traditional flange and multiple bolts for fixed installation. The operation is more convenient and labor-saving. At the same time, the clamping structure and the sealing structure are combined to ensure the sealing of the installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a pipeline compensator in an embodiment of the present invention;

[0022] Figure 2 In the embodiment of the present invention Figure 1 A magnified view of the structure at A;

[0023] Figure 3 is a schematic diagram of the structure of the intermediate sleeve at the driving plate in an embodiment of the present invention;

[0024] Figure 4 In the embodiment of the present invention Figure 3 A magnified view of the structure at B;

[0025] Figure 5 In the embodiment of the present invention Figure 3 A magnified view of the structure at C;

[0026] Figure 6 is a structural schematic diagram of abutting structure and sealing structure in an embodiment of the present invention;

[0027] Figure 7 In the embodiment of the present invention Figure 6 Enlarged view of the structure at D.

[0028] Explanation of the reference numerals: 1. sleeve; 2. connecting pipe; 3. intermediate sleeve; 4. opening plate; 5. fixing strip; 6. groove; 7. sealing plate; 8. arc groove; 9. through groove; 10. spring; 11. compensation pipe; 12. threaded block; 13. mounting seat; 14. fixing seat; 15. second screw; 16. turntable; 17. driving plate; 18. plug plate; 19. annular groove; 20. extrusion part; 21. first tightening sleeve; 22. first sealing ring; 23. fixing sleeve; 24. inner groove; 25. first sealing strip; 26. second sealing strip; 27. bellows; 28. second tightening sleeve; 29. ​​first U-shaped seat; 30. first curved plate; 31. second U-shaped seat; 32. second curved plate; 33. first fixed shaft; 34. second fixed shaft; 35. first screw. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-Figure 7 The present invention is described in further detail.

[0030] Reference Figure 1-Figure 7The embodiment of the present invention discloses a pipeline compensator, including a sleeve 1 and a compensating pipe 11, wherein the compensating pipe 11 is installed in the sleeve 1, a first compensating structure is arranged between the sleeve 1 and the compensating pipe 11, and a second compensating structure is arranged at both ends of the sleeve 1, a connecting pipe 2 is installed at both ends of the sleeve 1 through the first installation structure, and an intermediate sleeve 3 is fixed in the middle of the sleeve 1; the first compensating structure includes a plurality of groups of springs 10 arranged between the sleeve 1 and the compensating pipe 11, each spring 10 is installed on the outside of the compensating pipe 11 through the second installation structure, and the plurality of springs 10 of each group are installed on the outside of the compensating pipe 11. 0 are distributed at equal angles on the circumference of the compensation tube 11, and an opening structure is provided on the sleeve 1; the opening structure includes a plurality of groups of arc grooves 8 opened on the sleeve 1 on both sides of the intermediate sleeve 3, and each arc groove 8 has a through groove 9 for replacing the spring 10 on the groove wall, and a fixing strip 5 is connected between the intermediate sleeve 3 and both ends of the sleeve 1, and the fixing strip 5 is located between each group of two arc grooves 8, and two grooves 6 are respectively opened on the fixing strip 5 at the position corresponding to each arc groove 8, and a fixing rod is connected between the groove walls at both ends of the groove 6, and a movable sleeve on the fixing rod is provided with an opening plate 4, and the inner part of the opening plate 4 A blocking plate 7 is installed on the side; a first screw rod 35 is movably passed between the two ends of the sleeve 1, and nuts are tightened on both ends of the first screw rod 35 passing through the sleeve 1. A through hole is opened at one end of each flip-up plate 4 away from the fixing rod. When the compensator is used for a long time, the spring 10 between the sleeve 1 and the compensation tube 11 is broken, or the spring 10 cannot play a normal role, the nut at one end of the first screw rod 35 can be turned down, the first screw rod 35 can be pulled out from the middle sleeve 3, the sleeve 1 and the flip-up plate 4, the fixation of the flip-up plate 4 on the sleeve 1 is released, and then the fixing bar 5 is fixed. The flip-open plate 4 is rotated on the fixed rod in the upper groove 6, and the flip-open plate 4 is turned out from the arc groove 8 to expose the spring 10 between the sleeve 1 and the compensation tube 11, and the damaged spring 10 is replaced so that the compensator can continue to be used, reducing the cost. After replacing the spring 10, the flip-open plate 4 is turned into the arc groove 8, and the first screw 35 is passed through the through hole of the sleeve 1, the middle sleeve 3 and one end of the flip-open plate 4, and the nut is tightened on the first screw 35, so that the closed flip-open plate 4 can be fixed on the sleeve 1, and the firmness of the compensator is increased.

[0031] See also Figure 1-Figure 7 The second mounting structure includes a threaded block 12 connected to one end of each spring 10 close to the compensation tube 11, and a mounting seat 13 is installed at the position of each threaded block 12 outside the compensation tube 11. The threaded block 12 is tightened in the thread groove of the mounting seat 13, and the spring 10 is rotatably mounted on the mounting seat 13 through the threaded block 12, making the replacement of the spring 10 more convenient;

[0032] The first mounting structure includes a fixing seat 14 installed on the intermediate sleeve 3 at a position away from the fixing bar 5, a second screw 15 is rotatably connected to the fixing seat 14, a rotating disk 16 is fixedly sleeved on one end of the second screw 15, a driving plate 17 is sleeved on the second screw 15, the driving plate 17 extends to both ends of the sleeve 1, a thread groove for the second screw 15 to pass through is opened in the middle of the driving plate 17, and an insert plate 18 is movably inserted into the position of the driving plate 17 at both ends of the sleeve 1, one end of the insert plate 18 is connected to the driving plate 17, and a tightening structure is arranged on the insert plate 18, and the connecting pipe 2 is provided with an annular groove 19 on the part inserted into the casing 1, and the other end of the plug plate 18 is inserted into the annular groove 19. A sealing structure is provided between the connecting pipe 2 and the casing 1. After one end of two adjacent connecting pipes 2 is inserted into the casing 1, the second screw 15 can be directly rotated on the fixed seat 14 using the turntable 16, and the driving plate 17 moves on the rotating second screw 15, thereby driving the plug plate 18 to be inserted into the annular groove 19 on the connecting pipe 2, and the installation of the compensator can be realized, and the operation is more labor-saving and quick; the sealing structure includes a fixed installation near the end of the inner wall of the casing 1 The fixing sleeve 23 of the sleeve 1 is provided with a first abutting sleeve 21 fixed at a position near the fixing sleeve 23 on the connecting pipe 2, and the first abutting sleeve 21 abuts against the first sealing ring 22 on the side of the fixing sleeve 23. The side of the end of the plug plate 18 inserted into the annular groove 19 is provided with an inclined extrusion portion 20; the abutting structure includes an inner groove 24 opened on the inner wall of the sleeve 1 at the plug plate 18, and the plug plate 18 movably passes through the inner groove 24. A first blocking strip 25 abutting against the lower groove wall of the inner groove 24 is fixedly installed on the plug plate 18, and a second blocking strip 26 is fixedly installed on the plug plate 18 near the bottom end. The first blocking strip 25 and the second blocking strip 26 are both in the shape of arc plates. When the driving plate 17 drives the plug plate 18 to be inserted into the annular groove 19, the plug plate 18 drives the first blocking strip 25 to press against the lower groove wall of the inner groove 24, thereby playing a role of pressing and sealing. At the same time, the extrusion portion 20 on the plug plate 18 is pressed against one side groove wall of the annular groove 19. With the movement of the plug plate 18, the connecting pipe 2 can be pushed to move into the sleeve 1, thereby driving the first pressing sleeve 21 to press against the first sealing ring 22 on the fixed sleeve 23, so as to further improve the sealing performance of the compensator installation.

[0033] See also Figure 1 , Figure 3 and Figure 5The second compensation structure includes a bellows 27 installed on both ends of the sleeve 1, a second abutting sleeve 28 is fixedly provided on the connecting pipe 2, and the second abutting sleeve 28 is tightly pressed against the end surface of the bellows 27. A third compensation structure is provided between the bellows 27 and the sleeve 1, and the second abutting sleeve 28 is tightly pressed against the second sealing ring on the end surface of the bellows 27; the third compensation structure includes a plurality of first U-shaped seats 29 at the end of the bellows 27, a first fixed shaft 33 is fixedly passed through the first U-shaped seat 29, a plurality of second U-shaped seats 31 are installed on the end surface of the sleeve 1, a second fixed shaft 34 is fixedly passed through the second U-shaped seat 31, and a first curved plate 3 is movably provided on the first fixed shaft 33. 0, a second curved plate 32 is movably sleeved on the second fixed shaft 34, and each group of two first curved plates 30 is rotatably connected to the second curved plate 32. Both ends of the first fixed shaft 33 are sleeved with a first torsion spring, and both ends of the first torsion spring are respectively connected to the inner wall of the first U-shaped seat 29 and the first curved plate 30. Both ends of each second fixed shaft 34 are sleeved with a second torsion spring, and both ends of the second torsion spring are respectively connected to the second U-shaped seat 31 and the second curved plate 32. The deformation of the torsion spring is driven by the deformation of the bellows 27 and the rotation of the first curved plate 30 and the second curved plate 32, so as to compensate and protect the lateral thermal expansion and contraction generated on the connecting pipe 2, thereby improving the work quality.

[0034] The implementation principle of a pipeline compensator according to an embodiment of the present invention is as follows: when installing the compensator, firstly, the two ends of the sleeve 1 are sleeved onto the ends of two adjacent connecting pipes 2. When the first abutting sleeve 21 on the connecting pipe 2 is abutted against the fixing sleeve 23, the second screw 15 is rotated on the fixing seat 14 by using the rotating disk 16, and the driving plate 17 moves on the rotating second screw 15, driving the plug plate 18 to be inserted into the annular groove 19 on the connecting pipe 2. In the process of driving the plug plate 18 to be inserted into the annular groove 19, the plug plate 18 drives the first blocking strip 25 to abut against the fixing sleeve 23. The first sealing strip 25 is pressed against the lower groove wall of the inner groove 24 to achieve a sealing effect. At the same time, the extrusion portion 20 on the plug plate 18 is pressed against the groove wall on one side of the annular groove 19. As the plug plate 18 moves, the connecting pipe 2 can be pushed toward the sleeve 1, thereby driving the first pressing sleeve 21 to press against the first sealing ring 22 on the fixed sleeve 23, and the second pressing sleeve 28 to press against the second sealing ring on the end face of the bellows 27. The plug plate 18 also drives the first sealing strip 25 to move downward and press against the lower groove wall of the inner groove 24 to ensure the sealing of the compensator installation. When the connecting pipe 2 expands and contracts due to heat, the elastic force of the spring 10, the deformation of the bellows 27, and the deformation of the torsion spring can better play a compensating and protective role. When the compensator is used for a long time, the spring 10 between the sleeve 1 and the compensation tube 11 is broken, or the spring 10 cannot play a normal role, the nut at one end of the first screw rod 35 can be turned down, and the first screw rod 35 can be pulled out from the middle sleeve 3, the sleeve 1 and the opening plate 4, and the opening plate 4 is released from the sleeve 1. Then, the opening plate 4 is rotated on the fixing rod in the groove 6 on the fixing bar 5. The flip plate 4 is rotated out of the arc groove 8 to expose the spring 10 between the sleeve 1 and the compensation tube 11, and the damaged spring 10 is replaced so that the compensator can continue to be used, reducing the cost. After the spring 10 is replaced, the flip plate 4 is rotated into the arc groove 8, and the first screw 35 is passed through the through holes of the sleeve 1, the intermediate sleeve 3 and one end of the flip plate 4, and the nut is tightened on the first screw 35, so that the closed flip plate 4 can be fixed on the sleeve 1, and the firmness of the compensator is increased, and the structure is simple and the function is practical.

[0035] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipeline compensator, comprising a casing (1) and a compensating pipe (11), characterized in that: The compensating tube (11) is installed in the sleeve (1), a first compensating structure is provided between the sleeve (1) and the compensating tube (11), second compensating structures are provided at both ends of the sleeve (1), connecting tubes (2) are installed at both ends of the sleeve (1) through the first installation structure, and an intermediate sleeve (3) is fixed in the middle of the sleeve (1); The first compensation structure comprises a plurality of groups of springs (10) arranged between the sleeve (1) and the compensation tube (11), each of the springs (10) being mounted on the outside of the compensation tube (11) via a second mounting structure, the plurality of springs (10) in each group being distributed at equal angles around the circumference of the compensation tube (11), and the sleeve (1) being provided with an opening structure; The opening structure comprises a plurality of groups of arc grooves (8) formed on the sleeve (1) and located on both sides of the middle sleeve (3); a through groove (9) for replacing the spring (10) is formed on the groove wall of each arc groove (8); a fixing strip (5) is connected between the middle sleeve (3) and both ends of the sleeve (1); the fixing strip (5) is located between two arc grooves (8) in each group; two grooves (6) are formed on the fixing strip (5) at positions corresponding to each arc groove (8); a fixing rod is connected between the groove walls at both ends of the groove (6); a turning plate (4) is movably sleeved on the fixing rod; a blocking plate (7) is installed on the inner side of the turning plate (4); The first mounting structure comprises a fixing seat (14) mounted on the intermediate sleeve (3) at a position away from the fixing bar (5); a second screw rod (15) is rotatably connected to the fixing seat (14); a rotating disk (16) is fixedly mounted on one end of the second screw rod (15); a driving plate (17) is mounted on the second screw rod (15); the driving plate (17) extends to both ends of the sleeve (1); a thread groove for the second screw rod (15) to pass through is formed in the middle of the driving plate (17); a plug plate (18) is movably inserted into the positions of the driving plate (17) at both ends of the sleeve (1); one end of the plug plate (18) is connected to the driving plate (17); a tightening structure is provided on the plug plate (18); an annular groove (19) is formed on the portion of the connecting pipe (2) inserted into the sleeve (1); the other end of the plug plate (18) is inserted into the annular groove (19); and a sealing structure is provided between the connecting pipe (2) and the sleeve (1).

2. A pipeline compensator according to claim 1, characterized in that: A first screw rod (35) movably passes through the two ends of the sleeve (1), nuts are tightened on both ends of the first screw rod (35) passing through the sleeve (1), and a through hole is formed at one end of each flip plate (4) away from the fixed rod.

3. A pipeline compensator according to claim 1, characterized in that: The second mounting structure comprises a threaded block (12) connected to one end of each spring (10) close to the compensation tube (11); a mounting seat (13) is mounted on the outside of the compensation tube (11) at a position corresponding to each threaded block (12); and the threaded block (12) is tightened in a thread groove of the mounting seat (13).

4. A pipeline compensator according to claim 1, characterized in that: The sealing structure comprises a fixing sleeve (23) fixedly mounted on the inner wall of the sleeve (1) near the end thereof, a first abutting sleeve (21) fixed on the connecting pipe (2) at a position near the fixing sleeve (23), the first abutting sleeve (21) abutting against a first sealing ring (22) on the side of the fixing sleeve (23), and an inclined extrusion portion (20) is provided on the side of one end of the insert plate (18) inserted into the annular groove (19).

5. A pipeline compensator according to claim 1, characterized in that: The abutting structure comprises an inner groove (24) formed on the inner wall of the sleeve (1) at the insert plate (18), the insert plate (18) movably passing through the inner groove (24), a first blocking strip (25) fixedly mounted on the insert plate (18) abutting against the lower groove wall of the inner groove (24), a second blocking strip (26) fixedly mounted on the insert plate (18) at a position close to the bottom end, the first blocking strip (25) and the second blocking strip (26) both being in the shape of arc-shaped plates.

6. A pipeline compensator according to claim 1, characterized in that: The second compensation structure comprises a bellows (27) mounted on both ends of the sleeve (1); a second abutting sleeve (28) is fixed on the connecting pipe (2); the second abutting sleeve (28) abuts against the end surface of the bellows (27); a third compensation structure is provided between the bellows (27) and the sleeve (1); the second abutting sleeve (28) abuts against a second sealing ring on the end surface of the bellows (27).

7. A pipeline compensator according to claim 6, characterized in that: The third compensation structure comprises a plurality of first U-shaped seats (29) at the end of the bellows (27), a first fixed shaft (33) fixedly passing through the first U-shaped seat (29), a plurality of second U-shaped seats (31) mounted on the end surface of the sleeve (1), a second fixed shaft (34) fixedly passing through the second U-shaped seat (31), a first curved plate (30) movably sleeved on the first fixed shaft (33), a second curved plate (32) movably sleeved on the second fixed shaft (34), each group of two first curved plates (30) and the second curved plates (32) being rotatably connected, a first torsion spring sleeved at both ends of the first fixed shaft (33), the two ends of the first torsion spring being respectively connected to the inner wall of the first U-shaped seat (29) and the first curved plate (30), and a second torsion spring sleeved at both ends of each second fixed shaft (34), the two ends of the second torsion spring being respectively connected to the second U-shaped seat (31) and the second curved plate (32).

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