High-temperature-resistant labyrinth type expansion joint and assembling method thereof

Abstract

The invention discloses a high-temperature-resistant labyrinth type expansion joint and an assembling method thereof, and relates to the field of expansion joint structures, the high-temperature-resistant labyrinth type expansion joint comprises an annular left component and an annular right component, and the left component and the right component are combined to form a labyrinth structure; in the labyrinth structure, gaps for movement are formed between the left component and the right component in the radial direction and the axial direction; in the labyrinth structure, at least two filling cavities exist on an optimal solution path, all the filling cavities are filled with elastic fillers, and when the expansion joint moves, the deformation states of at least two fillers are opposite; and the filler is a high-temperature-resistant sealing material. The expansion joint can be applied to the environment with the high-temperature and high-sealing-performance requirements, meanwhile, the good axial and radial moving capacity is achieved, and the problems that a traditional expansion joint brings defects to machining, disassembling, assembling and overhauling and is poor in economical efficiency, short in service life, high in cost and the like are solved.

Description

Technical Field

[0001] The present invention relates to the field of expansion joint structures, and in particular to a high-temperature resistant labyrinth expansion joint and an assembly method thereof. Background Art

[0002] An expansion joint is a flexible structure provided on a container or pipeline to compensate for additional stresses caused by temperature differences and mechanical vibrations, also known as a compensator or expansion joint; it is usually divided into metal expansion joints (traditional metal expansion joints include elbow type, bellows type, and sleeve type) and non-metal expansion joints (traditional non-metal expansion joints include rubber air ducts and fiber fabrics); the traditional three metal expansion joints all have certain limitations. The elbow type expansion joint occupies a large space, consumes a lot of steel, has a large frictional resistance, and is easily restricted by space when used in large-diameter pipelines; the bellows expansion joint has too high rigidity and is difficult to work properly and has a short service life when encountering a slightly larger axial expansion difference or misalignment; and the general sleeve type expansion joint cannot solve the problems of large axial expansion difference or radial misalignment of the pipeline.

[0003] In a high-temperature environment, the elbow type expansion joint is rarely used, while the bellows type and sleeve type expansion joints can be used in high-temperature environments, but the mobility of the bellows type and sleeve type expansion joints is low and they cannot well adapt to the simultaneous axial and radial movements; moreover, the above-mentioned expansion joints are difficult to process, disassemble, and overhaul; for this reason, a new expansion joint is needed to solve the above technical problems. Summary of the Invention

[0004] The purpose of the present invention is to: in view of the above problems, provide a high-temperature resistant labyrinth expansion joint and an assembly method thereof, which can be applied to environments with high temperature and high sealing requirements, and at the same time has good axial and radial movement capabilities, and also solves the disadvantages brought by traditional expansion joints to processing, disassembly, overhaul, as well as problems such as poor economy, short service life, and high cost.

[0005] The technical solution adopted by the present invention is as follows: a high-temperature resistant labyrinth expansion joint includes an annular left component and a right component, and the left component and the right component are combined into a labyrinth structure; within this labyrinth structure, there are gaps for movement between the left component and the right component both radially and axially; within this labyrinth structure, there are at least two filling cavities on the optimal path, all filling cavities are filled with elastic packing materials, and when the expansion joint moves, at least two of the packing materials have opposite deformation states; this packing material is a high-temperature resistant sealing material.

[0006] Further, the left component has an annular left housing, and the right component has an annular right housing. The left housing and the right housing are both "L"-shaped annular plates, and the left housing and the right housing form an annular cavity with a rectangular cross-section, and the labyrinth structure is located within the annular cavity.

[0007] Further, the left component further includes a first frame fixed to the left housing and in a ring shape, and the right component further includes a second frame fixed to the right housing and in a ring shape. The first frame and the second frame are combined to form a labyrinth structure.

[0008] Further, the first frame is detachably and fixedly connected to the left housing.

[0009] Further, the second frame is detachably and fixedly connected to the right housing.

[0010] Further, the first frame surrounds the second frame. The second frame has at least one second part, and both sides of each second part have card slots, which are part of the filling cavity. All the second parts are detachably connected to form the second frame. The first frame has at least one first part, and the number of first parts is the same as that of the second parts. All the first parts are detachably connected to form the first frame, and a partition is detachably connected between adjacent first parts and extends into the space between adjacent second parts. The partition is part of the filling cavity.

[0011] Further, the second part includes a part main body and a template detachably connected to the part main body, and the part main body and the template form the card slot.

[0012] Further, both the left component and the right component have connecting flanges.

[0013] Further, both the left component and the right component have through holes corresponding in position, and a screw passes through the through holes corresponding in position on the left component and the right component, and both ends of the screw are connected with limit nuts. The diameter of the screw is smaller than the diameter of the through hole.

[0014] An assembling method of a high-temperature resistant labyrinth expansion joint for assembling the high-temperature resistant labyrinth expansion joint includes the following steps:

[0015] S1: Place the packing on the part main body, and then connect the template to the part main body to complete the assembly of the second part and the embedding of the packing into the card slot.

[0016] S2: Place the partition between adjacent second parts, dock the adjacent second parts and fix them.

[0017] S3: Dock adjacent first parts and fix the first parts and the partition to complete the assembly of the labyrinth structure.

[0018] S4: Fix the first frame formed by the first parts to the left housing, and fix the second frame formed by the second parts to the right housing to complete the assembly of the high-temperature resistant labyrinth expansion joint.

[0019] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0020] 1. The present invention uses a labyrinth and elastic high-temperature resistant sealing material as a filler, which has good sealing effect and can adapt to high-temperature working conditions;

[0021] 2. In the labyrinth structure of the present invention, there are gaps for movement between the left component and the right component both radially and axially, which can effectively absorb axial and radial expansions, enabling axial and radial mobility even in high-temperature environments, and having a wide range of applications;

[0022] 3. The present invention is assembled in a detachable manner and is made of thin plate parts, which are cheap, easy to disassemble, and convenient for assembly, maintenance, and overhaul, solving the disadvantages brought by traditional expansion joints in processing, disassembly, and overhaul, as well as problems such as poor economy, short service life, and high cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be described by way of examples with reference to the accompanying drawings, wherein:

[0024] Figure 1 is a three-dimensional structural schematic diagram of the expansion joint;

[0025] Figure 2 is a cross-sectional structural schematic diagram of the expansion joint;

[0026] Figure 3 is a structural schematic diagram of the left housing and the right housing;

[0027] Figure 4 is a structural schematic diagram of the labyrinth structure;

[0028] Figure 5 is a schematic diagram of step S1;

[0029] Figure 6 is a schematic diagram of steps 2-3;

[0030] Figure 7 is a schematic diagram of step S4;

[0031] Reference numerals in the figures: 1 - left component; 11 - left housing; 12 - first frame; 13 - first part; 14 - partition; 2 - right component; 21 - right housing; 22 - second frame; 23 - second part; 231 - part main body; 232 - template; 233 - card slot; 3 - filling cavity; 31 - filler; 4 - labyrinth structure; 5 - screw; 51 - limit nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] In the description of this specification, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this specification is usually placed during use. This is only for the convenience of describing this specification and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this specification.

[0033] In addition, in the description of this specification, if terms such as "horizontal" and "vertical" are used, it does not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that this structure must be completely horizontal, but can be slightly inclined.

[0034] In the description of this specification, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "linked" are used, they should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components.

[0035] Embodiment 1

[0036] As Figures 1-7 shown, a high-temperature resistant labyrinth expansion joint includes an annular left component 1 and a right component 2. The left component 1 and the right component 2 are combined into a labyrinth structure 4, that is, the optimal solution path is the fluid leakage path, and there are multiple turns on this path, and sealing is achieved through multiple turns; inside this labyrinth structure 4, there are gaps for movement between the left component 1 and the right component 2 both radially and axially. Through this gap, the movement space of the left component 1 and the right component 2 is given to achieve the ability to adapt to axial and radial expansion; inside this labyrinth structure 4, there are at least two filling cavities 3 on the optimal solution path. All filling cavities 3 are filled with elastic packing 31, and when this expansion joint moves, at least two deformation states of the packing 31 are opposite; the packing 31 is a high-temperature resistant sealing material; on the one hand, the packing 31 can buffer and absorb axial and radial expansion, on the other hand, it closes the optimal solution path, increases the performance of the sealed fluid, and enables this expansion joint to adapt to high-temperature environments.

[0037] It should be noted that the optimal solution path is the shortest path to get out of the maze.

[0038] In this embodiment, the number of the packing 31 is four. When the expansion joint moves, the deformation states of two packings 31 are opposite to those of the other two; taking axial expansion as an example, the left component 1 and the right component 2 move away from each other, squeezing the middle packing 31, and the packings 31 on both sides are relaxed. With this arrangement, effective buffering can be achieved regardless of how the left component 1 and the right component 2 move.

[0039] To sum up, the whole expansion joint is an integral unit and can be directly installed at the pipe connection. It adopts labyrinth and high-performance high-temperature-resistant material contact sealing, with good sealing effect and can adapt to high-temperature working conditions. The special structure of this kind of expansion joint can effectively absorb axial and radial expansions, and has a wide range of applications; since the whole expansion joint system is made by welding thin plates, the cost is low and it is easy to produce, and it is detachable, which is convenient for inspection and maintenance.

[0040] Embodiment 2

[0041] On the basis of Embodiment 1, a further feasible specific implementation manner is proposed.

[0042] In a feasible implementation manner, the left component 1 has an annular left housing 11, and the right component 2 has an annular right housing 21. Both the left housing 11 and the right housing 21 are "L"-shaped annular plates. The left housing 11 and the right housing 21 form an annular cavity with a rectangular cross-section, and the labyrinth structure 4 is located in the annular cavity. This structure makes the inlets and outlets of fluid leakage on the diagonals of the rectangle, having a better sealing effect.

[0043] In a feasible implementation manner, the left component 1 further includes a first frame 12 that is fixed on the left housing 11 and is annular, and the right component 2 further includes a second frame 22 that is fixed on the right housing 21 and is annular. The first frame 12 and the second frame 22 are combined to form the labyrinth structure 4.

[0044] In a feasible implementation manner, the first frame 12 is detachably and fixedly connected to the left housing 11, and the detachable and fixed connection can be realized by bolting, which is convenient for the disassembly and installation of the first frame 12.

[0045] In a feasible implementation manner, the second frame 22 is detachably and fixedly connected to the right housing 21, and the detachable and fixed connection can be realized by bolting, which is convenient for the disassembly and installation of the second frame 22.

[0046] Further, the first frame 12 surrounds the second frame 22. The second frame 22 has at least one second part 23. On both sides of each second part 23, there are clamping grooves 233, and the clamping grooves 233 are part of the filling cavity 3. All the second parts 23 are detachably connected to form the second frame 22. The first frame 12 has at least one first part 13. The number of the first parts 13 is the same as that of the second parts 23. All the first parts 13 are detachably connected to form the first frame 12. And between adjacent first parts 13, there is a partition 14 detachably connected. The partition 14 extends between adjacent second parts 23, and the partition 14 is part of the filling cavity 3. It can be realized to set the number of the first parts 13 and the second parts 23 according to the level of pressure, so that the sealing ability can not only achieve the expected effect, but also will not waste materials excessively. Specifically, taking the number of the packing 31 in Embodiment 1 as 4 for illustration, the number of both the first parts 13 and the second parts 23 is two. The partition 14 is located between adjacent first parts 13 and second parts 23. The first parts 13, the second parts 23 and the partition 14 cooperate with the left housing 11 to form 4 filling cavities 3, and thus 4 packings 31 can be filled.

[0047] Further, the second part 23 includes a part main body 231 and a template 232 detachably connected to the part main body 231. The part main body 231 and the template 232 form the clamping groove 233, which is convenient for installing the packing 31.

[0048] In a feasible implementation manner, both the left component 1 and the right component 2 have connecting flanges, so that the expansion joint is directly installed at the pipeline connection as a whole.

[0049] In a feasible implementation manner, both the left component 1 and the right component 2 have through holes corresponding in position, and there is a screw 5 passing through the through holes corresponding in position on the left component 1 and the right component 2. And at both ends of the screw 5, there are limit nuts 51 connected. The diameter of the screw 5 is smaller than the diameter of the through hole. The left component 1 and the right component 2 are limited, which not only facilitates transportation, but also will not affect the mobility.

[0050] Embodiment 3

[0051] As Figures 1-7 shown, an assembling method of a high-temperature resistant labyrinth expansion joint is used to assemble the high-temperature resistant labyrinth expansion joint described in any one of Embodiments 1-2, and includes the following steps:

[0052] S1: Place the packing 31 on the part main body 231, and then connect the template 232 with the part main body 231 to complete the assembly of the second part 23 and the embedding of the packing 31 into the clamping groove 233;

[0053] S2: Place the partition 14 between adjacent second parts 23, butt the adjacent second parts 23 and fix them.

[0054] S3: Butt adjacent first parts 13, and fix the first parts 13 and the partition 14 to complete the assembly of the labyrinth structure 4.

[0055] S4: Fix the first frame 12 composed of the first parts 13 to the left housing 11, and fix the second frame 22 composed of the second parts 23 to the right housing 21 to complete the assembly of the high-temperature resistant labyrinth expansion joint.

[0056] By assembling the high-temperature resistant labyrinth expansion joint through this step, there will be no interference of parts, the assembly is convenient, the assembly time is saved, the packing 31 can be pressed tightly, and the position accuracy of each component can be improved.

[0057] The present invention is not limited to the foregoing specific embodiments. The present invention extends to any new feature or any new combination disclosed in this specification, as well as any new method or process step or any new combination disclosed.

Claims

1. A high-temperature resistant labyrinth expansion joint, characterized in that: It includes an annular left component (1) and a right component (2), and the left component (1) and the right component (2) are combined into a labyrinth structure (4); within this labyrinth structure (4), there are gaps for movement between the left component (1) and the right component (2) both radially and axially; within this labyrinth structure (4), there are at least two filling cavities (3) on the optimal solution path, and all the filling cavities (3) are filled with elastic packing materials (31), and when the expansion joint moves, at least two of the packing materials (31) have opposite deformation states; the packing material (31) is a high-temperature resistant sealing material.

2. The high-temperature resistant labyrinth expansion joint according to claim 1, wherein: The left component (1) has an annular left housing (11), and the right component (2) has an annular right housing (21). Both the left housing (11) and the right housing (21) are "L"-shaped annular plates. The left housing (11) and the right housing (21) form an annular cavity with a rectangular cross-section, and the labyrinth structure (4) is located within the annular cavity.

3. The high-temperature resistant labyrinth expansion joint according to claim 2, characterized in that: The left component (1) further includes a first annular frame (12) fixed to the left housing (11), and the right component (2) further includes a second annular frame (22) fixed to the right housing (21). The first frame (12) and the second frame (22) are combined into the labyrinth structure (4).

4. The high-temperature resistant labyrinth expansion joint according to claim 3, characterized in that: The first frame (12) is detachably and fixedly connected to the left housing (11).

5. The high-temperature resistant labyrinth expansion joint according to claim 3, wherein: The second frame (22) is detachably and fixedly connected to the right housing (21).

6. The high-temperature resistant labyrinth expansion joint according to claim 3, wherein: The first frame (12) surrounds the second frame (22). The second frame (22) has at least one second part (23). On both sides of each second part (23), there are clamping grooves (233), and the clamping grooves (233) are part of the filling cavity (3); all the second parts (23) are detachably connected to form the second frame (22); the first frame (12) has at least one first part (13), and the number of the first parts (13) is the same as that of the second parts (23). All the first parts (13) are detachably connected to form the first frame (12), and partition plates (14) are detachably connected between adjacent first parts (13). The partition plates (14) extend into the spaces between adjacent second parts (23), and the partition plates (14) are part of the filling cavity (3).

7. The high-temperature resistant labyrinth expansion joint according to claim 6, characterized in that: The second part (23) includes a part main body (231) and a template (232) detachably connected to the part main body (231), and the part main body (231) and the template (232) form the clamping groove (233).

8. The high-temperature resistant labyrinth expansion joint according to claim 1, characterized in that: Both the left component (1) and the right component (2) have connecting flanges.

9. The high-temperature resistant labyrinth expansion joint according to claim 1, characterized in that: Both the left component (1) and the right component (2) have through holes corresponding in position, and a screw (5) passes through the through holes corresponding in position on the left component (1) and the right component (2), and both ends of the screw (5) are connected with limit nuts (51); the diameter of the screw (5) is smaller than the diameter of the through hole.

10. A method for assembling a high-temperature resistant labyrinth expansion joint, which is used to assemble the high-temperature resistant labyrinth expansion joint described in any one of claims 1-9, characterized in that: It includes the following steps: S1: Place the packing material (31) on the part main body (231), and then connect the template (232) to the part main body (231) to complete the assembly of the second part (23) and the embedding of the packing material (31) into the clamping groove (233); S2: Place the partition (14) between adjacent second parts (23), butt the adjacent second parts (23) and fix them; S3: Butt adjacent first parts (13), and fix the first parts (13) and the partition (14) to complete the assembly of the labyrinth structure (4); S4: Fix the first frame (12) composed of the first parts (13) to the left housing (11), and fix the second frame (22) composed of the second parts (23) to the right housing (21) to complete the assembly of the high-temperature resistant labyrinth expansion joint.

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