CN110953429A

CN110953429A - Novel hinge expansion joint for high-temperature flue of flue gas turbine

Info

Publication number: CN110953429A
Application number: CN201911215257.8A
Authority: CN
Inventors: 齐金祥; 陈四平; 郭海; 陆刚
Original assignee: Qinhuangdao Taidy Flex Tech Co ltd
Current assignee: Qinhuangdao Taidy Flex Tech Co ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-04-03

Abstract

The invention discloses a novel hinge expansion joint for a high-temperature flue of a flue gas turbine, which comprises: the device comprises a butt joint pipe I, a butt joint pipe II, a corrugated pipe, a bearing frame I, a bearing frame II, two groups of hinge mechanisms and eight groups of support components; the end joint pipe I, the corrugated pipe and the end joint pipe II are sequentially connected; the force bearing frame I is positioned on the side of the end connection pipe I and supports the end connection pipe I through four groups of support assemblies; the bearing frame II is positioned on the side of the end joint pipe II and supports the end joint pipe II through another four groups of support assemblies; and the two groups of hinge mechanisms are arranged between the bearing frame I and the bearing frame II. The invention ensures the lasting work of the expansion joint under the high-temperature working condition and prolongs the service life of the product.

Description

Novel hinge expansion joint for high-temperature flue of flue gas turbine

Technical Field

The invention belongs to the technical field of expansion joints, and particularly relates to a novel hinge expansion joint for a high-temperature flue of a flue gas turbine.

Background

The energy recovery system of the catalytic cracking device is a key device of the oil refining system, and the energy recovery system utilizes the flue gas of the catalytic cracking device, utilizes the temperature and pressure energy of the flue gas to drive a smoke machine, utilizes the pressure and temperature energy of the flue gas to generate power, and drives a main fan to do work or drives a generator to generate power so as to fully recover the energy of regenerated flue gas. Wherein the inlet pipeline part of the smoke machine is a hot wall structure, and the interior of the inlet pipeline part is free from heat insulation materials. The working pressure is higher, generally 0.2-0.38 MPa, and in order to improve the energy efficiency of a smoke machine in recent years, the medium temperature at the inlet of the smoke machine is generally increased by each catalytic cracking device, and the working temperature reaches 700-750 ℃.

In order to meet the displacement requirement and the stress requirement of the cigarette machine, a plurality of single hinge type expansion joints or universal hinge type expansion joints are generally arranged on the pipeline of the cigarette machine inlet. In order to restrain the pressure thrust of the bellows, when a single-hinge type expansion joint or a universal-hinge type expansion joint is provided, a force-receiving structural member (e.g., an austenitic stainless steel material such as 304, 304H, or 316H) is generally provided outside the pipeline and connected to the pipeline by welding. However, as mentioned above, the working temperature of the inlet of the range hood reaches 700 to 750 ℃, so that the stressed structural member is in a creep temperature range, and a weld bead of the stressed structural member is cracked frequently in the operation process, which seriously affects the normal operation of the equipment.

Disclosure of Invention

The technical problem of the invention is solved: the defects of the prior art are overcome, the novel hinge expansion joint for the high-temperature flue of the flue gas turbine is provided, the lasting work of the expansion joint under the high-temperature working condition is guaranteed, and the service life of a product is prolonged.

In order to solve the technical problem, the invention discloses a novel hinge expansion joint for a high-temperature flue of a flue gas turbine, which comprises the following components: the device comprises a butt joint pipe I, a butt joint pipe II, a corrugated pipe, a bearing frame I, a bearing frame II, two groups of hinge mechanisms and eight groups of support components;

the end joint pipe I, the corrugated pipe and the end joint pipe II are sequentially connected;

the force bearing frame I is positioned on the side of the end connection pipe I and supports the end connection pipe I through four groups of support assemblies;

the bearing frame II is positioned on the side of the end joint pipe II and supports the end joint pipe II through another four groups of support assemblies;

and the two groups of hinge mechanisms are arranged between the bearing frame I and the bearing frame II.

In the hinge expansion joint for the high-temperature flue of the novel flue gas turbine, the structure of the bearing frame I is the same as that of the bearing frame II;

force-bearing frame I includes: the device comprises a bearing plate I, a bearing plate II, a bearing steel pipe I and a bearing steel pipe II; the bearing plate I and the bearing plate II are arranged in parallel, and the upper end and the lower end of each of the bearing plate I and the bearing plate II are respectively connected and fixed through a bearing steel pipe I and a bearing steel pipe II;

force-bearing frame II includes: a bearing plate III, a bearing plate IV, a bearing steel pipe III and a bearing steel pipe IV; the bearing plate III and the bearing plate IV are arranged in parallel, and the upper end and the lower end of the bearing plate III and the upper end of the bearing plate IV are respectively connected and fixed through a bearing steel pipe III and a bearing steel pipe IV.

In the above-mentioned novel hinge expansion joint for flue gas turbine high temperature flue, two sets of the hinge mechanism are: the hinge mechanism I and the hinge mechanism II;

the hinge mechanism I comprises: the hinge structure comprises a pin shaft I, a hinge connecting plate I, a hinge plate I and a hinge plate II; one end of the hinge plate I is hinged with one end of the hinge plate II through a hinge connecting plate and a pin shaft I, the other end of the hinge plate I penetrates through a square groove in the force bearing steel pipe I to be welded with the force bearing steel pipe I, and the other end of the hinge plate II penetrates through a square groove in the force bearing steel pipe III to be welded with the force bearing steel pipe III;

the hinge mechanism II comprises: the hinge pin II, the hinge connecting plate II, the hinge plate III and the hinge plate IV are arranged in the hinge box; one end of the hinge plate III is hinged with one end of the hinge plate IV through a hinge connecting plate II and a pin shaft II, the other end of the hinge plate III penetrates through a square groove in the force bearing steel pipe II to be welded with the force bearing steel pipe II, and the other end of the hinge plate IV penetrates through a square groove in the force bearing steel pipe IV to be welded with the force bearing steel pipe IV.

In the hinge expansion joint for the high-temperature flue of the novel flue gas turbine, the eight groups of supporting components have the same structure; wherein, eight groups of supporting components are pairwise arranged respectively through a bearing steel pipe I, a bearing steel pipe II, a bearing steel pipe III and a bearing steel pipe IV.

In above-mentioned novel hinge expansion joint for flue gas turbine high temperature flue, the supporting component includes: the vertical plate, the connecting plate, the transverse limiting block, the longitudinal limiting block and the L-shaped limiting block are arranged on the vertical plate;

the bottom surfaces of the transverse limiting block, the longitudinal limiting block and the L-shaped limiting block are welded and fixed with the outer side of the butt joint pipe, and the whole body is subjected to solid solution treatment so as to thoroughly eliminate welding stress;

the connecting plate is limited by a transverse limiting block, a longitudinal limiting block and an L-shaped limiting block which are welded on the butt joint pipe and is arranged outside the butt joint pipe; wherein, the lower surface of the connecting plate is contacted with the end connecting pipe but not welded;

the bottom of the vertical plate is welded and fixed with the upper surface of the connecting plate;

the upper part of the vertical plate is provided with a round hole, and the vertical plate is arranged on the force bearing steel pipe through the round hole and is welded and fixed with the force bearing steel pipe.

In the hinge expansion joint for the novel high-temperature flue of the flue gas turbine, the exhaust holes are formed in the transverse limiting block, the longitudinal limiting block and the L-shaped limiting block, and gas is prevented from being reserved inside the welding process.

In above-mentioned novel hinge expansion joint for flue gas turbine high temperature flue, L type stopper includes: a limiting block I and a limiting block II;

the limiting block I and the limiting block II are vertically welded;

the bottom surface of the limiting block I is fixedly welded with the outer side of the butt joint pipe;

the side face of the limiting block II is in contact with the vertical plate to limit the transverse displacement of the vertical plate.

In the hinge expansion joint for the high-temperature flue of the novel flue gas turbine, the number of the transverse limiting blocks is 3, the number of the longitudinal limiting blocks is 4, and the number of the L-shaped limiting blocks is one;

the 3 transverse limiting blocks and the L-shaped limiting block are respectively positioned on two opposite side surfaces of the connecting plate;

every two of the 4 longitudinal limiting blocks form a group and are respectively positioned on the other two opposite side surfaces of the connecting plate.

The invention has the following advantages:

(1) the invention discloses a novel hinge expansion joint for a high-temperature flue of a flue gas turbine, which changes the traditional connection mode of welding and fixing vertical plates and end connecting pipes into mechanical connection through a supporting component, and changes the welding mode into a floating mode, thereby thoroughly eliminating the problem of thermal stress between a structural member and the end connecting pipes due to welding, ensuring the lasting work of the expansion joint under the high-temperature working condition and prolonging the service life of a product.

(2) The invention discloses a novel hinge expansion joint for a high-temperature flue of a flue gas turbine, which can effectively absorb angular displacement through two groups of hinge mechanisms and meet the use requirements of products.

(3) The invention discloses a novel hinge expansion joint for a high-temperature flue of a flue gas turbine, which is characterized in that only a limiting block is welded with a butt joint pipe, so that the welding amount is small, the welding stress and the welding deformation can be fully reduced, and the problem of structural member cracking caused by deformation and thermal stress in the welding process is avoided; meanwhile, the butt joint pipe and the limiting block are welded to facilitate postweld heat treatment, so that the thermal stress of a welding position is further reduced, and the cracking and the damage of a welding seam are avoided; in addition, the welding position of the limiting block and the butt joint pipe is convenient for external heat preservation on site, and deformation and welding stress caused by too large temperature difference when the welding position works can be avoided.

(4) The invention discloses a novel hinge expansion joint for a high-temperature flue of a flue gas turbine, which reduces the width and the thickness of a structural member, is convenient for product processing and manufacturing and greatly reduces the product cost.

Drawings

FIG. 1 is a schematic structural diagram of a hinge expansion joint for a high-temperature flue of a novel flue gas turbine according to an embodiment of the invention;

FIG. 2 is a partial view of a novel hinge expansion joint for a high temperature flue of a flue gas turbine according to an embodiment of the present invention;

FIG. 3 is a frame diagram of a hinge expansion joint for a high-temperature flue of a novel flue gas turbine according to an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1, in this embodiment, the novel hinge expansion joint for high-temperature flue of flue gas turbine includes: the end joint pipe I1, the end joint pipe II 2, the corrugated pipe 3, the bearing frame I6, the bearing frame II 7, two groups of hinge mechanisms and eight groups of supporting components.

The specific connection relationship is as follows: the end joint pipe I1, the corrugated pipe 3 and the end joint pipe II 2 are sequentially connected; the force bearing frame I6 is positioned on the side of the end joint pipe I1 and supports the end joint pipe I1 through four groups of support assemblies; the bearing frame II 7 is positioned on the side of the end joint pipe II 2 and supports the end joint pipe II 2 through the other four groups of support assemblies; the two groups of hinge mechanisms are arranged between the bearing frame I6 and the bearing frame II 7.

In the embodiment, the bearing frame I6 and the bearing frame II 7 have the same structure.

Preferably, as shown in fig. 1, the force bearing frame i 6 may specifically include: the device comprises a bearing plate I61, a bearing plate II 62, a bearing steel pipe I63 and a bearing steel pipe II 64. The bearing plate I61 and the bearing plate II 62 are arranged in parallel, and the upper end and the lower end of the bearing plate I61 and the upper end and the lower end of the bearing plate II 62 are respectively connected and fixed through a bearing steel pipe I63 and a bearing steel pipe II 64.

Preferably, as shown in fig. 1, the force-bearing frame ii 7 may specifically include: a bearing plate III 71, a bearing plate IV 72, a bearing steel pipe III 73 and a bearing steel pipe IV 74. The bearing plate III 71 and the bearing plate IV 72 are arranged in parallel, and the upper end and the lower end of the bearing plate III 71 and the upper end of the bearing plate IV 72 are respectively connected and fixed through a bearing steel pipe III 73 and a bearing steel pipe IV 74.

In this embodiment, the two sets of hinge mechanisms are: hinge mechanism I4 and hinge mechanism II 5. The hinge mechanism I4 and the hinge mechanism II 5 are identical in structure.

Preferably, as shown in fig. 1, the hinge mechanism i 4 may specifically include: the hinge comprises a pin I41, a hinge connecting plate I42, a hinge plate I43 and a hinge plate II 44. One end of the hinge plate I43 is hinged with one end of the hinge plate II 44 through a hinge connecting plate 42 and a pin shaft I41, the other end of the hinge plate I43 penetrates through a square groove in the bearing steel pipe I63 to be welded with the bearing steel pipe I63, and the other end of the hinge plate II 44 penetrates through a square groove in the bearing steel pipe III 73 to be welded with the bearing steel pipe III 73.

Preferably, as shown in fig. 2, the hinge mechanism ii 5 may specifically include: a pin shaft II 51, a hinge connecting plate II 52, a hinge plate III 53 and a hinge plate IV 54. One end of the hinge plate III 53 is hinged with one end of the hinge plate IV 54 through a hinge connecting plate II 52 and a pin shaft II 51, the other end of the hinge plate III 53 penetrates through a square groove in the force bearing steel pipe II 64 to be welded with the force bearing steel pipe II 64, and the other end of the hinge plate IV 54 penetrates through a square groove in the force bearing steel pipe IV 74 to be welded with the force bearing steel pipe IV 74.

In this embodiment, as shown in fig. 1, the eight sets of support members have the same structure. Wherein, eight groups of supporting components are pairwise and are respectively installed through a bearing steel pipe I63, a bearing steel pipe II 64, a bearing steel pipe III 73 and a bearing steel pipe IV 74.

Preferably, the structure of the support member is described by taking an arbitrary set of support members as an example. As shown in fig. 3, the support assembly includes: the vertical plate 8, the connecting plate 9, the transverse limiting block 10, the longitudinal limiting block 11 and the L-shaped limiting block 12. Wherein: the bottom surfaces of the transverse limiting block 10, the longitudinal limiting block 11 and the L-shaped limiting block 12 are welded and fixed with the outer side of the butt joint pipe, and the whole body is subjected to solution treatment so as to thoroughly eliminate welding stress; the connecting plate 9 is limited by a transverse limiting block 10, a longitudinal limiting block 11 and an L-shaped limiting block 12 which are welded on the end joint pipe and is arranged outside the end joint pipe; the bottom of the vertical plate 8 is welded and fixed with the upper surface of the connecting plate 9; the upper part of the vertical plate 8 is provided with a round hole, and the vertical plate 8 is arranged on the force bearing steel pipe through the round hole and is welded and fixed with the force bearing steel pipe.

It can be seen that the connecting plate 9 is not welded with the end joint pipe, the transverse limiting block 10, the longitudinal limiting block 11 and the L-shaped limiting block 12, the limiting is only carried out through the transverse limiting block 10, the longitudinal limiting block 11 and the L-shaped limiting block 12, the lower surface of the connecting plate 9 is in contact with the end joint pipe but is not welded, so that a floating structure is formed between the connecting plate 9 and the end joint pipe, and the problem of welding seam cracking and damage cannot occur.

Further, the number of the transverse limiting blocks 10 is 3, the number of the longitudinal limiting blocks 11 is 4, and the number of the L-shaped limiting blocks 12 is one. Wherein, 3 transverse limit blocks 10 and an L-shaped limit block 12 are respectively positioned on two opposite side surfaces of the connecting plate 9; every two of the 4 longitudinal limited blocks 11 form a group and are respectively positioned on the other two opposite side surfaces of the connecting plate 9.

Further, all be provided with the exhaust hole on horizontal stopper 10, vertical stopper 11 and the L type stopper 12, avoid welding in-process inside to have gaseous persistence.

Further, as shown in fig. 3, the L-shaped stopper 12 includes: stopper I121 and stopper II 122. The limiting block I121 and the limiting block II 122 are vertically welded; the bottom surface of the limiting block I121 is fixedly welded with the outer side of the end connecting pipe; the side face of the limiting block II 122 is in contact with the vertical plate 8 so as to limit the transverse displacement of the vertical plate 8.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.

Those skilled in the art will appreciate that the invention may be practiced without these specific details.

Claims

1. The utility model provides a novel hinge expansion joint for flue gas turbine high temperature flue which characterized in that includes: the corrugated pipe support comprises a butt joint pipe I (1), a butt joint pipe II (2), a corrugated pipe (3), a bearing frame I (6), a bearing frame II (7), two groups of hinge mechanisms and eight groups of support components;

the end joint pipe I (1), the corrugated pipe (3) and the end joint pipe II (2) are connected in sequence;

the bearing frame I (6) is positioned on the side of the end connection pipe I (1) and supports the end connection pipe I (1) through four groups of support assemblies;

the bearing frame II (7) is positioned on the side of the end connecting pipe II (2) and supports the end connecting pipe II (2) through another four groups of support assemblies;

the two groups of hinge mechanisms are arranged between the bearing frame I (6) and the bearing frame II (7).

2. The novel hinge expansion joint for the high-temperature flue of the flue gas turbine as claimed in claim 1, wherein the bearing frame I (6) and the bearing frame II (7) have the same structure;

force-bearing frame I (6) includes: the device comprises a bearing plate I (61), a bearing plate II (62), a bearing steel pipe I (63) and a bearing steel pipe II (64); the bearing plate I (61) and the bearing plate II (62) are arranged in parallel, and the upper end and the lower end of the bearing plate I (61) and the upper end and the lower end of the bearing plate II (62) are respectively connected and fixed through a bearing steel pipe I (63) and a bearing steel pipe II (64);

bearing frame II (7) includes: a bearing plate III (71), a bearing plate IV (72), a bearing steel pipe III (73) and a bearing steel pipe IV (74); the bearing plate III (71) and the bearing plate IV (72) are arranged in parallel, and the upper end and the lower end of the bearing plate III (71) and the upper end and the lower end of the bearing plate IV (72) are respectively connected and fixed through a bearing steel pipe III (73) and a bearing steel pipe IV (74).

3. The novel hinge expansion joint for the high-temperature flue of the flue gas turbine as claimed in claim 2, wherein the two groups of hinge mechanisms are: a hinge mechanism I (4) and a hinge mechanism II (5);

hinge mechanism I (4) comprising: the hinge comprises a pin shaft I (41), a hinge connecting plate I (42), a hinge plate I (43) and a hinge plate II (44); one end of the hinge plate I (43) is hinged with one end of the hinge plate II (44) through a hinge connecting plate (42) and a pin shaft I (41), the other end of the hinge plate I (43) penetrates through a square groove in the force bearing steel pipe I (63) to be welded with the force bearing steel pipe I (63), and the other end of the hinge plate II (44) penetrates through a square groove in the force bearing steel pipe III (73) to be welded with the force bearing steel pipe III (73);

the hinge mechanism II (5) comprises: a pin shaft II (51), a hinge connecting plate II (52), a hinge plate III (53) and a hinge plate IV (54); one end of the hinge plate III (53) is hinged with one end of the hinge plate IV (54) through the hinge connecting plate II (52) and the pin shaft II (51), the other end of the hinge plate III (53) penetrates through a square groove in the bearing steel pipe II (64) to be welded with the bearing steel pipe II (64), and the other end of the hinge plate IV (54) penetrates through a square groove in the bearing steel pipe IV (74) to be welded with the bearing steel pipe IV (74).

4. The novel hinge expansion joint for the high-temperature flue of the flue gas turbine as claimed in claim 2, wherein the eight groups of support assemblies have the same structure; wherein, eight groups of supporting components are pairwise and are respectively installed through a bearing steel pipe I (63), a bearing steel pipe II (64), a bearing steel pipe III (73) and a bearing steel pipe IV (74).

5. The novel hinge expansion joint for the high-temperature flue of the flue gas turbine as claimed in claim 4, wherein the support assembly comprises: the vertical plate (8), the connecting plate (9), the transverse limiting block (10), the longitudinal limiting block (11) and the L-shaped limiting block (12);

the bottom surfaces of the transverse limiting block (10), the longitudinal limiting block (11) and the L-shaped limiting block (12) are welded and fixed with the outer side of the butt joint pipe, and the whole body is subjected to solution treatment so as to thoroughly eliminate welding stress;

the connecting plate (9) is limited by a transverse limiting block (10), a longitudinal limiting block (11) and an L-shaped limiting block (12) which are welded on the butt joint pipe and is arranged outside the butt joint pipe; wherein the lower surface of the connecting plate (9) is contacted with the end connecting pipe but not welded;

the bottom of the vertical plate (8) is welded and fixed with the upper surface of the connecting plate (9);

the upper part of the vertical plate (8) is provided with a round hole, and the vertical plate (8) is arranged on the force bearing steel pipe through the round hole and is welded and fixed with the force bearing steel pipe.

6. The novel hinge expansion joint for the high-temperature flue of the flue gas turbine as claimed in claim 5, wherein the transverse limiting block (10), the longitudinal limiting block (11) and the L-shaped limiting block (12) are all provided with vent holes, so that gas is prevented from remaining in the welding process.

7. The novel hinge expansion joint for the high-temperature flue of the flue gas turbine as claimed in claim 5, wherein the L-shaped limiting block (12) comprises: a limiting block I (121) and a limiting block II (122);

the limiting block I (121) and the limiting block II (122) are vertically welded;

the bottom surface of the limiting block I (121) is fixedly welded with the outer side of the end connecting pipe;

the side face of the limiting block II (122) is in contact with the vertical plate (8) so as to limit the transverse displacement of the vertical plate (8).

8. The novel hinge expansion joint for the high-temperature flue of the flue gas turbine as claimed in claim 5, wherein the number of the transverse limiting blocks (10) is 3, the number of the longitudinal limiting blocks (11) is 4, and the number of the L-shaped limiting blocks (12) is one;

the 3 transverse limiting blocks (10) and the L-shaped limiting block (12) are respectively positioned on two opposite side surfaces of the connecting plate (9);

every two of the 4 longitudinal limiting blocks (11) form a group and are respectively positioned on the other two opposite side surfaces of the connecting plate (9).