Sectional type combined ripple compensator

Abstract

The utility model discloses a sectional type combined corrugated compensator which comprises a plurality of corrugated pipes and hard pipes, the corrugated pipes and the hard pipes are spaced one by one, the adjacent corrugated pipes and the hard pipes are coaxially connected through flange assemblies, and each flange assembly comprises a first flange plate and a second flange plate; a lining is arranged on the inner surface of the corrugated pipe, and the end of the lining is clamped between the first flange plate and the second flange plate; and each corrugated pipe is correspondingly provided with a guide cylinder. The sectional type combined corrugated compensator is composed of the corrugated pipe and the hard pipe, the corrugated pipe and the hard pipe are flexible and convenient to install, and the difficulty of installation, replacement and overhaul of the corrugated compensator is greatly reduced; and the structural strength is higher, the problem that gas leakage is prone to occurring due to low rigidity, deformation, arching and cracking can be effectively solved, the structural stability is greatly improved, and the use safety of the compensator is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows compensators, in particular to a segmented combined bellows compensator. Background Art

[0002] As an energy-saving device, the BPRT gas turbine of the ironmaking blast furnace uses the blast furnace gas pressure to drive the turbine rotor to rotate, thereby realizing the effect of energy recovery. The outlet gas pipeline below the turbine is installed with a bellows compensator. The bellows compensator is a compensation element that uses the expansion and contraction of its working body bellows to absorb the dimensional changes of pipelines, ducts and containers caused by thermal expansion and contraction, etc., and compensate for the axial, lateral and angular displacement of pipelines, ducts, containers, etc. In addition, it can also be used to reduce noise and vibration. The current bellows compensator on the outlet gas pipeline below the turbine has the following main disadvantages:

[0003] 1. The bellows compensator is integrated and has a long overall length. When installing it to the outlet gas pipeline under the turbine or repairing it, the outlet gas pipeline under the turbine is close to the inlet gas pipeline, and the space under the turbine is very narrow, so the installation, replacement and repair of the bellows compensator are extremely difficult;

[0004] 2. Blast furnace gas is highly corrosive. Although an anti-corrosion lining is installed in the bellows compensator, there is no anti-corrosion lining at the connection part of the bellows compensator. The connection part of the bellows compensator is easily corroded and worn, resulting in gas leakage and a short service life.

[0005] 3. The retractable structure of the corrugated compensator has low rigidity and is prone to deformation, arching and cracking, which may cause gas leakage and pose a major safety hazard. Utility Model Content

[0006] The utility model aims to provide a segmented combined corrugated compensator.

[0007] The technical solution for achieving the purpose of the present utility model is as follows: A segmented combined bellows compensator includes a number of bellows and rigid pipes spaced at intervals. The adjacent bellows and rigid pipes are coaxially connected through a flange assembly. The flange assembly includes a first flange and a second flange. The first flange is coaxially installed on the bellows, and the second flange is coaxially installed on the rigid pipe. The first flange and the second flange are coaxially and tightly connected by bolts. An inner lining is provided on the inner surface of the bellows, and the end of the inner lining is clamped between the first flange and the second flange. A flow guide cylinder is provided corresponding to each bellows. The flow guide pipe is fixedly arranged. The length of the flow guide cylinder is D1, and the length of the bellows is D2. The relationship between D1 and D2 satisfies D1 > D2. The outer diameter of the flow guide cylinder is R1, and the inner diameter of the inner lining is R2. The relationship between R1 and R2 satisfies R1 < R2. The flow guide cylinder extends into the bellows.

[0008] Further, sealing grooves are provided on the opposite surfaces of the first flange and the second flange. A sealing ring is installed in the sealing grooves. The sealing ring is located between the first flange and the second flange and is in close contact with the first flange and the second flange. The setting of the sealing ring can greatly improve the sealing performance of the connection between the first flange and the second flange.

[0009] Further, in the flange assembly at one end of the bellows, the first flange is coaxially sleeved and fixed on the outer wall of the end of the bellows. The inner diameter of the second flange is R3, and the inner diameter of the rigid pipe is R4. The relationship between R3 and R4 satisfies R3 < R4. The second flange is coaxially and fixedly installed on the end face of the rigid pipe, and the flow guide cylinder is coaxially and fixedly installed on the second flange. The flow guide cylinder can be fixedly installed on the rigid pipe or fixed on the second flange. Compared with the former, the installation operation of the latter is more convenient.

[0010] Further, a small tie rod is provided corresponding to each bellows. The two ends of the small tie rod are respectively fixedly connected to the adjacent rigid pipes on both sides of the bellows. The small tie rod can support and fix each bellows, and the stability of each bellows is better.

[0011] Further, the segmented combined bellows compensator is also provided with a large tie rod. The two ends of the large tie rod are respectively connected to the two outermost rigid pipes. The large tie rod can support and fix the entire segmented combined bellows compensator, and the stability of the overall structure of the segmented combined bellows compensator is better.

[0012] The utility model provides a segmented combined bellows compensator, which is composed of a plurality of bellows and hard pipes spaced one by one. The length of each section of the bellows and the hard pipe is relatively short and can be detachably installed through the flange assembly. Under the structure composed of the bellows and the hard pipe, on the one hand, the relatively short and detachable bellows and hard pipe are flexible and convenient to install, especially in the narrow space below the turbine, when each section of the bellows and the hard pipe is installed on the outlet gas pipeline below the turbine, or when it is repaired, the relatively short bellows and the hard pipe are more conducive to disassembly and assembly operations, which greatly reduces the difficulty of installation, replacement and maintenance of the corrugated compensator; on the other hand, the assembly of the hard pipe can increase the structural strength of the compensator. Compared with the whole bellows with a longer length, the span of the bellows arranged in sections and intervals is relatively small, and the shear force on the bellows itself is also relatively small, resulting in a higher structural strength of the compensator. It can effectively avoid the problem of gas leakage due to low rigidity, deformation, arching and cracking, greatly improve the structural stability, and ensure the safe use of the compensator.

[0013] The utility model of the segmented combined bellows compensator not only sets the lining on the inner surface of the bellows, but also makes the end clamp of the lining be placed between the first flange and the second flange. The lining with the end clamp placed between the first flange and the second flange completely isolates the tube body and the end of the bellows from the outside, and the protection of the bellows is more complete and comprehensive. The bellows does not have the problem of corrosion, wear and gas leakage due to the failure of local anti-corrosion, and its service life is longer. At the same time, compared with the rigid structure of the first flange and the second flange, the elasticity of the lining is better. After the end clamp of the lining is placed between the first flange and the second flange, the force of the lining to restore the deformation after the lining is pressed and deformed can make it more closely attached to the first flange and the second flange, and the sealing performance of the installation is better. That is to say, the lining with the end clamp placed between the first flange and the second flange can also greatly improve the sealing performance of the installation of the first flange and the second flange, and effectively prevent the leakage of smoke between the first flange and the second flange.

[0014] In addition, in the segmented combined corrugated compensator of the present utility model, a flow guide cylinder is further installed on the second flange, the flow guide cylinder extends into the corrugated pipe, and the length of the flow guide cylinder is greater than the length of the corrugated pipe. The flow guide cylinder plays a role in guiding the flow, enabling the flue gas to flow smoothly through the corrugated pipe. At the same time, it also has a certain isolation effect on the corrugated pipe, reducing the amount of flue gas in contact with the corrugated pipe and lowering the risk of the flue gas corroding the corrugated pipe. Moreover, the flow guide cylinder located inside the corrugated pipe also supports the corrugated pipe, increasing the structural strength of the compensator. Under the support of the corrugated pipe, it can effectively prevent the corrugated pipe from bending, arching, and cracking, thereby avoiding gas leakage and greatly improving the stability of the compensator structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural view of the segmented combined corrugated compensator of the present utility model;

[0016] Figure 2 is Figure 1 an enlarged structural view of the partial area A in

[0017] Figure 3 is a partial structural view of the corrugated pipe and the flange assemblies at both ends of the segmented combined corrugated compensator of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following provides a detailed description of the preferred embodiments of the segmented combined corrugated compensator of the present utility model with reference to the accompanying drawings:

[0019] As Figures 1 to 3 shown, a segmented combined corrugated compensator includes a plurality of corrugated pipes 1 and rigid pipes 2 that are spaced apart from each other at intervals. The adjacent corrugated pipes 1 and rigid pipes 2 are coaxially connected through a flange assembly 3. The flange assembly 3 includes a first flange 31 and a second flange 32. The first flange 31 is coaxially installed on the corrugated pipe 1, and the second flange 32 is coaxially installed on the rigid pipe 2. The first flange 31 and the second flange 32 are coaxially and tightly connected through bolts 30. A lining 11 is provided on the inner surface of the corrugated pipe 1, and the end 111 of the lining 11 is clamped between the first flange 31 and the second flange 32. Each corrugated pipe 1 is correspondingly provided with a flow guide cylinder 4. The flow guide pipe 4 is fixedly arranged. The length of the flow guide cylinder 4 is D1, the length of the corrugated pipe 1 is D2, and the relationship between D1 and D2 satisfies D1 > D2. The outer diameter of the flow guide cylinder 4 is R1, the inner diameter of the lining 11 is R2, and the relationship between R1 and R2 satisfies R1 < R2. The flow guide cylinder 4 extends into the corrugated pipe 1.

[0020] The utility model of the segmented combined bellows compensator is composed of the bellows 1 and the hard pipe 2, and the bellows 1 and the hard pipe 2 are detachably connected through the flange assembly 3. The flange assembly 3 is used to connect the bellows 1 and the hard pipe 2. The guide tube 4 can be installed on the hard pipe 2, and can also be installed on the first flange 32; the guide tube 4 has a guiding effect on the flue gas, and at the same time, it is also used to protect and strengthen the bellows 1. The lining 11 is used to prevent the corrosion of the flue gas and protect the bellows 1.

[0021] The utility model provides a segmented combined corrugated compensator, when in use, with its two ends mounted on the outlet gas pipeline below the turbine, from which the gas is output.

[0022] The utility model provides a segmented combined bellows compensator, which is composed of a plurality of bellows 1 and hard pipes 2 spaced one by one. The length of each section of the bellows 1 and the hard pipe 2 is relatively short, and the bellows 1 and the hard pipe 2 can be detachably installed through the flange assembly 3. Under the structure composed of the bellows 1 and the hard pipe 2, on the one hand, the relatively short and detachable bellows 1 and the hard pipe 2 are flexible and convenient to install, especially in the narrow space under the turbine, when each section of the bellows 1 and the hard pipe 2 is installed on the outlet gas pipeline under the turbine, or when it is repaired, the relatively short bellows 1 and the hard pipe 2 are more conducive to disassembly and assembly operations, which greatly reduces the difficulty of installation, replacement and maintenance of the corrugated compensator; on the other hand, the assembly of the hard pipe 2 can increase the structural strength of the compensator. Compared with the whole bellows with a longer length, the span of the bellows 1 arranged in sections and intervals is relatively small, and the shear force on the bellows 1 itself is also relatively small, resulting in a higher structural strength of the compensator. It can effectively avoid the problem of gas leakage due to low rigidity, deformation, arching, cracking, etc., greatly improve the structural stability, and ensure the safe use of the compensator.

[0023] The utility model of the segmented combined bellows compensator not only sets the lining 11 on the inner surface of the bellows 1, but also sandwiches the end 111 of the lining 11 between the first flange 31 and the second flange 32. The lining 11 with the end 111 sandwiched between the first flange 31 and the second flange 32 completely isolates the pipe body and the end of the bellows 1 from the outside, and protects the bellows 1 more completely and comprehensively. The bellows 1 does not have the problems of corrosion, wear and gas leakage due to partial failure of anti-corrosion, and has a longer service life. At the same time, compared with the rigid structure of the first flange 31 and the second flange 32, the lining 11 has better elasticity. After the end head 111 of the lining 11 is clamped between the first flange 31 and the second flange 32, the force of the lining 11 to restore the deformation after the lining 11 is compressed and deformed can make it fit more closely to the first flange 31 and the second flange 32, and the installation sealing is better. That is to say, the lining 11 with the end head 111 clamped between the first flange 31 and the second flange 32 can also greatly improve the installation sealing of the first flange 31 and the second flange 32, and effectively prevent the leakage of smoke between the first flange 31 and the second flange 32.

[0024] In addition, the utility model of the segmented combined bellows compensator also has the guide tube 4 installed on the second flange 32, the guide tube 4 extends into the bellows 1, and the length D1 of the guide tube 4 is greater than the length D2 of the bellows 1. The guide tube 4 plays a guiding role, allowing the flue gas to flow smoothly through the bellows 1, and also has a certain isolation effect on the bellows 1, reducing the amount of flue gas in contact with the bellows 1, reducing the risk of flue gas corroding the bellows 1, and the guide tube 4 located in the bellows 1 also supports the bellows 1, increasing the structural strength of the compensator. Under the support of the bellows 1, the bellows 1 can be effectively prevented from bending, arching, cracking and causing gas leakage, greatly improving the stability of the compensator structure.

[0025] In the utility model, the segmented combined corrugated compensator is preferably provided with a sealing groove 33 on the opposite disk surface of the first flange 31 and the second flange 32, and a sealing ring 34 is installed in the sealing groove 33. The sealing ring 34 is located between the first flange 31 and the second flange 32 and is tightly attached to the first flange 31 and the second flange 32. The provision of the sealing ring 34 can greatly improve the sealing performance of the connection between the first flange 31 and the second flange 32.

[0026] The segmented combined bellows compensator of the present utility model. Preferably, in the flange assembly 3 at one end of the bellows 1, the first flange plate 31 is coaxially sleeved and fixed on the outer wall of the end of the bellows 1. The inner diameter of the second flange plate 32 is R3, and the inner diameter of the hard pipe 2 is R4. The relationship between R3 and R4 satisfies R3 < R4. The second flange plate 32 is coaxially fixedly installed on the end face of the hard pipe 2, and the flow guide cylinder 4 is coaxially fixedly installed on the second flange plate 32. The flow guide cylinder 4 can be fixedly installed on the hard pipe 2 or on the second flange plate 32. Compared with the former, the installation operation of the latter is more convenient.

[0027] The segmented combined bellows compensator of the present utility model. Preferably, in the flange assembly 3 at the other end of the bellows 1, the first flange plate 31 is coaxially sleeved and fixed on the outer wall of the end of the bellows 1, and the second flange plate 32 is coaxially sleeved and fixed on the outer wall of the end of the hard pipe 2.

[0028] The segmented combined bellows compensator of the present utility model. Preferably, each bellows 1 is correspondingly provided with a small tie rod 5. The two ends of the small tie rod 5 are respectively fixedly connected to the hard pipes 2 adjacent to both sides of the bellows 1. The small tie rod 5 can support and fix each bellows 1, and the stability of each bellows 1 is better.

[0029] The segmented combined bellows compensator of the present utility model. Preferably, the segmented combined bellows compensator is further provided with a large tie rod 6. The two ends of the large tie rod 6 are respectively connected to the two outermost hard pipes 2. The large tie rod 6 can support and fix the entire segmented combined bellows compensator, and the stability of the overall structure of the segmented combined bellows compensator is better.

[0030] For those of ordinary skill in the technical field to which the present utility model pertains, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, which should all be regarded as falling within the protection scope of the present utility model.

Claims

1. A segmented combined corrugated compensator, characterized in that: It includes a number of corrugated pipes and rigid pipes that are spaced apart one by one. The adjacent corrugated pipes and rigid pipes are coaxially connected through a flange assembly. The flange assembly includes a first flange and a second flange. The first flange is coaxially installed on the corrugated pipe, the second flange is coaxially installed on the rigid pipe, and the first flange and the second flange are coaxially fastened and connected by bolts; a lining is provided on the inner surface of the corrugated pipe, and the end of the lining is clamped between the first flange and the second flange; a flow guide cylinder is provided corresponding to each corrugated pipe, the flow guide cylinder is fixedly arranged, the length of the flow guide cylinder is D1, the length of the corrugated pipe is D2, and the relationship between D1 and D2 satisfies D1 > D2. The outer diameter of the flow guide cylinder is R1, the inner diameter of the lining is R2, and the relationship between R1 and R2 satisfies R1 < R2. The flow guide cylinder extends into the corrugated pipe.

2. The segmented combined corrugated compensator according to claim 1 is characterized in that: Sealing grooves are provided on the opposite surfaces of the first flange and the second flange, and sealing rings are installed in the sealing grooves. The sealing rings are located between the first flange and the second flange and are in close contact with the first flange and the second flange.

3. The segmented combined corrugated compensator according to claim 1 is characterized in that: In the flange assembly at one end of the corrugated pipe, the first flange is coaxially sleeved and fixed on the outer wall of the end of the corrugated pipe. The inner diameter of the second flange is R3, the inner diameter of the rigid pipe is R4, and the relationship between R3 and R4 satisfies R3 < R4. The second flange is coaxially and fixedly installed on the end face of the rigid pipe, and the flow guide cylinder is coaxially and fixedly installed on the second flange.

4. The segmented combined corrugated compensator according to claim 1 is characterized in that: Each corrugated pipe is provided with a small pull rod correspondingly, and the two ends of the small pull rod are respectively fixedly connected to the adjacent rigid pipes on both sides of the corrugated pipe.

5. The segmented combined corrugated compensator according to claim 1 is characterized in that: The segmented combined corrugated compensator is also provided with a large pull rod, and the two ends of the large pull rod are respectively connected to the outermost two rigid pipes.

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