Large deformation compensation sealing device

Abstract

The invention discloses a large deformation compensation sealing device which comprises a sealing assembly, a first pipeline and a second pipeline, the first pipeline and the second pipeline are adjacent, and the sealing assembly is arranged at the butt joint interval of the first pipeline and the second pipeline. The sealing assembly comprises a flange set, a double-P-shaped sealing ring, an elastic connecting piece and an adjusting pressing mechanism, the flange set comprises two flanges, the two flanges are installed on the first pipeline and the second pipeline respectively, and the two flanges are connected through the elastic connecting piece; the adjusting and pressing mechanism comprises a spring, an adjusting component and a pressing plate, the adjusting component is connected with the elastic connecting piece through the spring, the adjusting component abuts against the pressing plate, and the pressing plate presses the outer ring of the double-P-type sealing ring. According to the large deformation compensation sealing device provided by the embodiment of the invention, the large deformation of the pipeline can be effectively compensated, the capacity of adapting to the large deformation is improved, and the long-term stable sealing of the joint of the pipeline can be kept.

Description

Technical Field

[0001] The invention relates to the technical field of sealing, and in particular to a large deformation compensating sealing device. Background Art

[0002] Pipe expansion joints, also known as compensators, are used to compensate for large displacement deformations of pipes on both sides to ensure the sealing effect when displacement deformation occurs on both sides of the pipes.

[0003] At present, the sealing of pipeline expansion joints is mostly welding of U-shaped pipes with pipes on both sides, and compensation is made by using the deformation of the corrugated part of the U-shaped pipe. The sealing between the existing compressed air chamber liners is mostly sealing strips.

[0004] However, the existing sealing structure is complicated to process, leakage is prone to occur at the weld, the sealing performance is poor, and the ability to adapt to large deformation is weak. Summary of the invention

[0005] The present invention provides a large deformation compensating sealing device, aiming to at least solve the technical problems in the prior art that the sealing structure has poor sealing performance and weak ability to adapt to large deformation.

[0006] The present invention provides a large deformation compensation sealing device, comprising a sealing assembly, a first pipe and a second pipe adjacent to each other, wherein a butt joint interval is provided between the first pipe and the second pipe, and the sealing assembly is arranged at the butt joint interval between the first pipe and the second pipe;

[0007] The sealing assembly includes a flange group, a double P-type sealing ring, an elastic connector and an adjusting and clamping mechanism, the flange group includes two flanges, the two flanges are respectively installed on the first pipeline and the second pipeline, and the two flanges are connected by an elastic connector;

[0008] The double P-type sealing ring is installed between the two flanges, the double P-type sealing ring surrounds the outside of the first pipe and the second pipe, and the double P-type sealing ring includes a main body and two P-type parts respectively connected to both ends of the main body;

[0009] The adjusting and clamping mechanism includes a spring, an adjusting component and a clamping plate. The adjusting component is connected to the elastic connecting member through a spring. The adjusting component presses against the clamping plate. The clamping plate presses against the outer ring of the double P-type sealing ring so that the two P-type parts press against the outer surfaces of the first pipe and the second pipe respectively. When the first pipe and the second pipe are both in an undeformed state, the spring is in a compressed state.

[0010] Optionally, a sealed space is formed inside the double P-type sealing ring, a high-pressure side area is formed inside the first pipe and the second pipe, the sealed space is connected to the high-pressure side area, and the pressure of the high-pressure side area is used to make the two P-type parts press against the inner walls of the two flanges respectively.

[0011] Optionally, the adjusting member comprises a supporting plate and an adjusting bolt, the supporting plate and the pressing plate are both located between two flanges in the flange group, and the supporting plate is connected to the elastic connecting member via a spring;

[0012] The adjusting bolt passes through the elastic connecting piece, a threaded through hole is formed on the support plate, the adjusting bolt is screwed to the threaded through hole, the bottom end of the adjusting bolt protrudes out of the support plate, and the bottom end of the adjusting bolt is pressed against the pressing plate;

[0013] When the first pipe and the second pipe are both in an undeformed state, the inner side walls of the two flanges are used to limit the rotation of the support plate.

[0014] Optionally, the cross section of the support plate perpendicular to the axial direction of the flange is in the shape of an arc, and the chord length of the arc is greater than the distance between the inner side walls of the two flanges;

[0015] When the first pipe and the second pipe are both in an undeformed state, along the axial direction of the flange, the distance between the support plate and the inner side wall of the flange is less than or equal to 5 mm.

[0016] Optionally, the number of the double P-type sealing ring is one; and the interiors of the two P-type parts are both hollow.

[0017] Optionally, the number of the adjusting and clamping mechanisms is at least two, and at least two of the adjusting and clamping mechanisms are arranged at intervals along the circumference of the flange.

[0018] Optionally, the spring is sleeved on the adjusting bolt, one end of the spring is connected to the elastic connecting piece, and the other end of the spring is connected to the supporting plate.

[0019] Optionally, a groove is formed on the upper surface of the clamping plate close to the support plate, and the bottom end of the adjusting bolt extends into the groove.

[0020] Optionally, a through hole is provided on the elastic connecting member, the adjusting bolt comprises a rod portion and a head portion, and the through hole is used for the rod portion of the adjusting bolt to pass through.

[0021] Optionally, the elastic connecting member is an annular spring plate, which is sleeved on the circumferential outer surfaces of the two flanges, and along the axial direction of the flanges, two ends of the annular spring plate are respectively connected to the two flanges.

[0022] Optionally, along the axial direction of the flange, two ends of the annular spring plate are connected to the two flanges through two fastener groups respectively;

[0023] Each of the fastener groups includes a plurality of fastening bolts, and the plurality of fastening bolts are arranged at intervals along the circumference of the flange. Each of the flanges is provided with a plurality of connection holes corresponding to the plurality of fastening bolts one by one.

[0024] Optionally, along the axial direction of the flange, the distance between the inner side walls of the two flanges is greater than the width of the butt-jointing interval between the first pipe and the second pipe.

[0025] Optionally, the axial direction of the first pipeline is parallel to the axial direction of the second pipeline, and the two flanges are fixedly connected to the first pipeline and the second pipeline respectively;

[0026] The two flanges both have inner holes, wherein the inner hole of one flange is sleeved on the outer surface of the first pipe, and the inner hole of the other flange is sleeved on the outer surface of the second pipe.

[0027] In an embodiment of the present invention, when the first pipe and the second pipe are both in an undeformed state, the spring is in a compressed state, and under the action of the spring force, the adjusting member presses against the pressing plate, and the double P-type sealing ring is pressed by the pressing plate to ensure the sealing effect. When the first pipe and / or the second pipe are deformed, the elastic action of the spring enables the adjusting member and the pressing plate to adapt and adjust, and continue to press the double P-type sealing ring to maintain the sealing performance. Therefore, a large deformation compensation sealing device provided in an embodiment of the present invention can effectively compensate for large deformations of the pipeline, improve the ability to adapt to large deformations, and maintain long-term stable sealing at the pipeline connection, ensure the sealing effect, and improve the reliability and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0029] Figure 1 A schematic diagram of a large deformation compensation sealing device provided in an embodiment of the present invention Figure 1 ;

[0030] Figure 2 A schematic diagram of a large deformation compensation sealing device provided in an embodiment of the present invention Figure 2 .

[0031] Reference numerals:

[0032] 1-first pipeline, 2-second pipeline, 3-flange, 4-elastic connector, 5-double P-type sealing ring, 51-P-type part, 6-adjusting and clamping mechanism, 61-spring, 62-adjusting bolt, 63-support plate, 64-clamping plate, 7-fastening bolt, 8-docking interval, 9-sealing space, 10-high-pressure side area. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0034] The embodiments of the present invention are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0035] At present, the seal of the pipeline expansion joint is mostly welded between the U-shaped tube and the pipes on both sides, and the deformation of the U-shaped part is used for compensation. The seals between the existing compressed air chamber liners are mostly sealing strips. However, the existing sealing structure is complicated to process, leakage is prone to occur at the weld, the sealing performance is poor, and the ability to adapt to large deformation is weak. In order to solve the above problems, an embodiment of the present invention provides a large deformation compensation sealing device, and the above-mentioned large deformation compensation sealing device is described in detail below.

[0036] Reference Figure 1 and Figure 2 The embodiment of the present invention provides a large deformation compensation sealing device, including a sealing component, a first pipe 1 and a second pipe 2 adjacent to each other, a butt joint interval 8 is provided between the first pipe 1 and the second pipe 2, and the sealing component is arranged at the butt joint interval 8 between the first pipe 1 and the second pipe 2; the sealing component includes a flange group, a double P-type sealing ring 5, an elastic connector 4 and an adjusting and clamping mechanism 6, the flange group includes two flanges 3, the two flanges 3 are respectively installed on the first pipe 1 and the second pipe 2, and the two flanges 3 are connected by the elastic connector 4; the double P-type sealing ring 5 is installed between the two flanges 3, The double P-type sealing ring 5 surrounds the outside of the first pipe 1 and the second pipe 2. The double P-type sealing ring 5 includes a main body and two P-type parts 51 respectively connected to the two ends of the main body; the adjusting and clamping mechanism 6 includes a spring 61, an adjusting component and a clamping plate 64. The adjusting component is connected to the elastic connecting member 4 through the spring 61. The adjusting component presses against the clamping plate 64. The clamping plate 64 presses the outer ring of the double P-type sealing ring 5 so that the two P-type parts 51 press against the outer surfaces of the first pipe 1 and the second pipe 2 respectively. When the first pipe 1 and the second pipe 2 are both in an undeformed state, the spring 61 is in a compressed state.

[0037] Among them, a large deformation compensation sealing device provided by an embodiment of the present invention can be applied to the sealing of large pipeline expansion joints, and can also be applied to the sealing between the inner liners of compressed air chambers. The large deformation compensation sealing device is preferably applied to the sealing of large pipeline expansion joints, compressed air chambers, etc.

[0038] The first pipeline 1 is adjacent to the second pipeline 2, and there is a docking interval 8 between the first pipeline 1 and the second pipeline 2. The sealing assembly is arranged at the docking interval 8 between the first pipeline 1 and the second pipeline 2. The two flanges in the flange group can be arranged symmetrically. The elastic connector 4 connects the two flanges 3. When one of the flanges 3 is deformed with the deformation of the pipeline, the relative positions of the two flanges 3 will change. At this time, the elastic connector 4 can adapt to the position change of the two flanges 3 through its own elastic deformation. The elastic connector 4 is preferably an annular spring plate, which is sleeved on the circumferential outer surface of the two flanges 3. The adjusting member may include an adjusting bolt 62 and a support plate 63. The elastic connector 4 can seal the support plate 63, the clamping plate 64 and the double P-type sealing ring 5 between the two flanges 3. The function of the spring 61 is to provide elasticity in the radial direction of the flange 3 to compress the support plate 63.

[0039] The double P-type sealing ring 5 is a sealing ring with a cross-sectional shape of two P-types, wherein the two P-types are symmetrically arranged. The double P-type sealing ring 5 is usually made of a wear-resistant and elastic material, such as rubber. The number of double P-type sealing rings 5 ​​can be one or more. The number of double P-type sealing rings 5 ​​is preferably one. The outer ring of the double P-type sealing ring 5 is pressed against the clamping plate 64, and the inner ring of the double P-type sealing ring 5 is pressed against the outer surfaces of the first pipe 1 and the second pipe 2. The inner side walls of the two flanges 3 are the side walls on the two flanges 3 that are opposite to and close to each other. When the first pipe 1 and the second pipe 2 are both in an undeformed state, the spring 61 is in a compressed state. At this time, the compression amount of the spring 61 can be greater than 50% of its original length, preferably greater than 75% of its original length.

[0040] Preferably, along the axial direction of the flange 3, the distance between the inner side walls of the two flanges 3 is greater than the width of the butt joint interval 8 between the first pipe 1 and the second pipe 2. Figure 1 The direction indicated by the arrow A in the figure. The axial direction of the first pipe 1 is parallel to the axial direction of the second pipe 2, and the two flanges 3 are fixedly connected to the first pipe 1 and the second pipe 2 respectively; the two flanges 3 have inner holes, the inner hole of one flange 3 is sleeved on the outer surface of the first pipe 1, and the inner hole of the other flange 3 is sleeved on the outer surface of the second pipe 2. The two flanges 3 can be welded to the first pipe 1 and the second pipe 2 respectively.

[0041] When the first pipe 1 and the second pipe 2 are both in an undeformed state, the spring 61 is in a compressed state. Under the action of the spring force of the spring 61, the adjusting member presses against the pressing plate 64, and the double P-type sealing ring 5 is pressed by the pressing plate 64 to ensure the sealing effect. When the first pipe 1 and / or the second pipe 2 are deformed, the elastic action of the spring 61 enables the adjusting member and the pressing plate 64 to adapt to the deformation, continue to press the double P-type sealing ring 5, and maintain the sealing performance. In the case of pipe deformation, the deformation adaptability of the double P-type sealing ring 5 can keep the two P-type parts 51 in close contact with the outer surfaces of the first pipe 1 and the second pipe 2, thereby achieving effective sealing. It should be noted that the deformation of the first pipe 1 and / or the second pipe 2 can be axial deformation, radial deformation, or simultaneous axial and radial deformation.

[0042] For example, refer to Figure 1 At this time, the first pipe 1 and the second pipe 2 are both in an undeformed state, and the spring 61 is in a compressed state. Under the action of the spring force of the spring 61, the adjusting member presses against the pressing plate 64, the double P-type sealing ring 5 is pressed by the pressing plate 64, and the two P-type parts 51 press against the outer surfaces of the first pipe 1 and the second pipe 2 respectively. Figure 2 When the second pipe 2 is deformed to the right and downward, the flange 3 connected to the second pipe 2 is deformed along with the deformation of the second pipe 2. At this time, the elastic connector 4 is elastically deformed to adapt to the deformation of the flange 3. At the same time, the spring 61 is extended. Under the action of the spring force of the spring 61, the adjusting member is pushed to press against the clamping plate 64, so that the clamping plate 64 presses the double P-type sealing ring 5, so that the two P-type parts 51 are respectively pressed against the outer surfaces of the first pipe 1 and the second pipe 2. It should be noted that when the first pipe 1 and / or the second pipe 2 are deformed, the spring 61 can still be in a compressed state after the spring 61 is extended. Specifically, the lower end surfaces of the two P-type parts 51 are respectively pressed against the outer surfaces of the first pipe 1 and the second pipe 2.

[0043] In the embodiment of the present invention, when the first pipe 1 and the second pipe 2 are both in an undeformed state, the spring 61 is in a compressed state, and under the action of the spring force of the spring 61, the adjusting member presses against the pressing plate 64, and the double P-type sealing ring 5 is pressed by the pressing plate 64 to ensure the sealing effect. When the first pipe 1 and / or the second pipe 2 are deformed, the elastic action of the spring 61 enables the adjusting member and the pressing plate 64 to adapt and adjust, and continue to press the double P-type sealing ring 5 to maintain the sealing performance. Therefore, a large deformation compensation sealing device provided in the embodiment of the present invention can effectively compensate for the large deformation of the pipeline, improve the ability to adapt to large deformation, and maintain long-term stable sealing at the pipeline connection, ensure the sealing effect, and improve the reliability and safety of the system.

[0044] In a preferred embodiment of the present invention, a sealing space 9 is formed inside the double P-type sealing ring 5, a high-pressure side area 10 is formed inside the first pipe 1 and the second pipe 2, the sealing space 9 is connected to the high-pressure side area 10, and the pressure of the high-pressure side area 10 is used to make the two P-type parts 51 press against the inner walls of the two flanges 3 respectively.

[0045] Among them, a low-pressure side area is formed on the outside of the first pipeline 1, the second pipeline 2 and the sealing assembly. The sealing space 9 is connected to the high-pressure side area 10 through the docking interval 8, and the pressure of the high-pressure side area 10 can act on the sealing space 9, and then act on the double P-type sealing ring 5. Through the pressure of the high-pressure side area 10, the fit between the two P-type parts 51 in the double P-type sealing ring 5 and the inner wall of the flange 3 can be enhanced, thereby improving the sealing effect. When the pipeline is deformed, for example, when the second pipeline 2 is deformed to the right and downward, the pressure of the high-pressure side area 10 continues to act on the double P-type sealing ring 5, so that the two P-type parts 51 in the double P-type sealing ring 5 are turned outward to both sides, thereby respectively pressing against the inner walls of the two flanges 3, so as to further improve the ability to adapt to large deformations, thereby ensuring that the seal can still be maintained when the pipeline is greatly deformed.

[0046] In a preferred embodiment of the present invention, the adjusting component includes a support plate 63 and an adjusting bolt 62. The support plate 63 and the clamping plate 64 are both located between the two flanges 3 in the flange group. The support plate 63 is connected to the elastic connector 4 through a spring 61. The adjusting bolt 62 passes through the elastic connector 4. A threaded through hole is provided on the support plate 63. The adjusting bolt 62 is screwed to the threaded through hole. The bottom end of the adjusting bolt 62 protrudes from the support plate 63, and the bottom end of the adjusting bolt 62 is pressed against the clamping plate 64. When the first pipe 1 and the second pipe 2 are both in an undeformed state, the inner side walls of the two flanges 3 are used to limit the rotation of the support plate 63.

[0047] The support plate 63 is preferably not in contact with the clamping plate 64. The cross section of the support plate 63 perpendicular to the axial direction of the flange 3 is in an arc shape, and the cross section of the clamping plate 64 perpendicular to the axial direction of the flange 3 is in an arc shape, and the curvature of the arc is preferably less than π. The threaded through hole penetrates the support plate 63 along the thickness direction of the support plate 63. When the first pipeline 1 and the second pipeline 2 are both in an undeformed state, the inner side walls of the two flanges 3 can limit the rotation of the support plate 63, that is, when the adjusting bolt 62 rotates, it will not drive the support plate 63 to rotate together.

[0048] Preferably, the cross-section of the support plate 63 perpendicular to the axial direction of the flange 3 is in the shape of an arc, and the chord length of the arc is greater than the distance between the inner walls of the two flanges 3; when the first pipe 1 and the second pipe 2 are both in an undeformed state, along the axial direction of the flange 3, the distance between the support plate 63 and the inner wall of the flange 3 is less than or equal to 5 mm.

[0049] When the pipeline is in an undeformed state, the position of the support plate 63 can be adjusted first to adjust the compression amount of the spring 61. The process of adjusting the position of the support plate 63 may include: when the pipeline is in an undeformed state, the bottom end of the adjusting bolt 62 is tightened by the double P-type sealing ring 5 and the pressing plate 64, and the adjusting bolt 62 is rotated to move the support plate 63 toward the elastic connector 4, so that the support plate 63 presses the spring 61 to adjust the compression amount of the spring 61.

[0050] When the second pipe 2 deforms rightward and downward, the spring 61 stretches, and under the action of the spring force of the spring 61, the support plate 63 is pushed downward, thereby pushing the adjustment bolt 62 threadedly connected to the support plate 63 downward to press against the clamping plate 64, so that the clamping plate 64 moves downward, and then pushes the double P-type sealing ring 5 downward, so that the lower end surfaces of the two P-type parts 51 press against the outer surfaces of the first pipe 1 and the second pipe 2 respectively to compensate for the deformation of the second pipe 2. It should be noted that after the first pipe 1 and / or the second pipe 2 are deformed, the position of the support plate 63 can be adjusted again to adjust the compression amount of the spring 61.

[0051] In a preferred embodiment of the present invention, the number of the double P-type sealing ring 5 is one; the interiors of the two P-type parts 51 are both hollow. When the double P-type sealing ring 5 is not deformed, the cross-sectional shape of the hollow part of the P-type part 51 can be circular, elliptical, etc. The hollow interior of the P-type part 51 is conducive to the deformation of the P-type part 51, enhances the deformation ability of the P-type part 51, and further enhances the deformation ability of the double P-type sealing ring 5. In addition, when the interior of the P-type part 51 is hollow, the material consumption of the double P-type sealing ring 5 is also reduced.

[0052] In a preferred embodiment of the present invention, the number of the adjusting and clamping mechanisms 6 is at least two, and the at least two adjusting and clamping mechanisms 6 are arranged at intervals along the circumference of the flange 3. The number of the adjusting and clamping mechanisms 6 can be two, three, four, etc. The at least two adjusting and clamping mechanisms 6 are preferably evenly arranged along the circumference of the flange 3. By providing at least two adjusting and clamping mechanisms 6, the double P-type sealing ring 5 can be evenly stressed along the circumference of the flange 3 to ensure the sealing effect.

[0053] In a preferred embodiment of the present invention, the spring 61 is sleeved on the adjusting bolt 62, one end of the spring 61 is connected to the elastic connector 4, and the other end of the spring 61 is connected to the support plate 63. A groove is provided on the upper surface of the clamping plate 64 close to the support plate 63, and the bottom end of the adjusting bolt 62 extends into the groove. A through hole is provided on the elastic connector 4, and the adjusting bolt 62 includes a rod and a head, and the through hole is used for the rod of the adjusting bolt 62 to pass through.

[0054] The shape of the groove can be circular, square, etc. The size of the groove is preferably larger than the diameter of the adjusting bolt 62. The position of the groove on the clamping plate 64 corresponds to the position of the threaded through hole on the support plate 63. By setting the groove, it can be ensured that the bottom end of the adjusting bolt 62 is stably pressed against the clamping plate 64. By setting the through hole on the elastic connector 4, the rod of the adjusting bolt 62 can pass through the elastic connector 4. The head and part of the rod of the adjusting bolt 62 are exposed to facilitate the rotation of the adjusting bolt 62.

[0055] In addition, when the second pipe 2 is deformed to the right and downward, the flange 3 connected to the second pipe 2 is deformed along with the deformation of the second pipe 2. At this time, the elastic connector 4 is elastically deformed to adapt to the deformation of the flange 3. After the elastic connector 4 is elastically deformed, the positions of the adjusting bolt 62, the spring 61, the support plate 63 and the clamping plate 64 will be changed accordingly to ensure that the clamping plate 64 can continue to clamp the outer ring of the double P-type sealing ring.

[0056] In a preferred embodiment of the present invention, the elastic connector 4 is an annular spring plate, which is sleeved on the circumferential outer surface of the two flanges 3, and along the axial direction of the flange 3, the two ends of the annular spring plate are respectively connected to the two flanges 3. Along the axial direction of the flange 3, the two ends of the annular spring plate are respectively connected to the two flanges 3 through two fastener groups; each fastener group includes a plurality of fastening bolts 7, and the plurality of fastening bolts 7 are arranged at intervals along the circumference of the flange 3, and each flange 3 is provided with a plurality of connection holes corresponding to the plurality of fastening bolts 7.

[0057] When one of the flanges 3 is deformed along with the deformation of the pipeline, the relative positions of the two flanges 3 will change. At this time, the annular spring plate can adapt to the position change of the two flanges 3 through its own elastic deformation. The number of fastening bolts 7 included in each fastener group can be set according to actual needs, and this embodiment does not limit this. The plurality of fastening bolts 7 are preferably evenly arranged along the circumference of the flange 3. The flange 3 may include a main body and an edge protrusion connected to the outer edge of the main body, the connecting hole may pass through the edge protrusion, and the connecting hole may be a threaded hole. At this time, the fastening bolt 7 is threadedly connected to the connecting hole.

[0058] In summary, in a large deformation compensation sealing device provided by an embodiment of the present invention, the first pipe 1 and the second pipe 2 are both in an undeformed state, and the spring 61 is in a compressed state. Under the action of the spring force of the spring 61, the support plate 63 is pushed, thereby pushing the adjusting bolt 62 threadedly connected to the support plate 63 to press against the clamping plate 64, and the outer ring of the double P-type sealing ring 5 is pressed by the clamping plate 64, and the two P-type parts 51 are respectively pressed against the outer surfaces of the first pipe 1 and the second pipe 2. At the same time, the pressure of the high-pressure side area 10 acts on the double P-type sealing ring 5, so that the two P-type parts 51 are respectively pressed against the inner walls of the two flanges 3.

[0059] When the second pipe 2 is deformed to the right and downward, the spring 61 extends, and under the action of the spring force of the spring 61, the support plate 63 is pushed downward, thereby pushing the adjusting bolt 62 threadedly connected to the support plate 63 downward to press against the clamping plate 64, so that the clamping plate 64 moves downward, and then pushes the double P-type sealing ring 5 downward, so that the lower end surfaces of the two P-type parts 51 are respectively pressed against the outer surfaces of the first pipe 1 and the second pipe 2. At the same time, the pressure in the high-pressure side area 10 continues to act on the double P-type sealing ring 5, so that the two P-type parts 51 in the double P-type sealing ring 5 are turned outward to both sides, thereby respectively pressing against the inner walls of the two flanges 3 to compensate for the deformation of the second pipe 2.

[0060] The large deformation compensation sealing device provided in the embodiment of the present invention can effectively compensate for the large deformation of the pipeline, improve the ability to adapt to large deformation, and maintain long-term stable sealing at the pipeline connection, ensure the sealing effect, and improve the reliability and safety of the system. The large deformation compensation sealing device provided in the embodiment of the present invention can be applied to the sealing of large pipeline expansion joints, and can also be applied to the sealing between the inner liners of compressed air chambers.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0062] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0063] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

[0065] The large deformation compensating sealing device provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the structure of the present invention and its core idea; at the same time, for general technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A large deformation compensation sealing device, characterized in that: It comprises a sealing assembly, a first pipe and a second pipe adjacent to each other, a butt joint interval is provided between the first pipe and the second pipe, and the sealing assembly is arranged at the butt joint interval between the first pipe and the second pipe; The sealing assembly includes a flange group, a double P-type sealing ring, an elastic connector and an adjusting and clamping mechanism, the flange group includes two flanges, the two flanges are respectively installed on the first pipeline and the second pipeline, and the two flanges are connected by an elastic connector; The double P-type sealing ring is installed between the two flanges, the double P-type sealing ring surrounds the outside of the first pipe and the second pipe, and the double P-type sealing ring includes a main body and two P-type parts respectively connected to both ends of the main body; The adjusting and clamping mechanism includes a spring, an adjusting component and a clamping plate. The adjusting component is connected to the elastic connecting member through a spring. The adjusting component presses against the clamping plate. The clamping plate presses against the outer ring of the double P-type sealing ring so that the two P-type parts press against the outer surfaces of the first pipe and the second pipe respectively. When the first pipe and the second pipe are both in an undeformed state, the spring is in a compressed state.

2. The large deformation compensating sealing device according to claim 1, characterized in that: A sealed space is formed inside the double P-type sealing ring, and a high-pressure side area is formed inside the first pipe and the second pipe. The sealed space is connected to the high-pressure side area, and the pressure of the high-pressure side area is used to make the two P-type parts press against the inner walls of the two flanges respectively.

3. The large deformation compensating sealing device according to claim 1 or 2, characterized in that: The adjusting member comprises a supporting plate and an adjusting bolt, wherein the supporting plate and the pressing plate are both located between two flanges in the flange group, and the supporting plate is connected to the elastic connecting member via a spring; The adjusting bolt passes through the elastic connecting piece, a threaded through hole is formed on the support plate, the adjusting bolt is screwed to the threaded through hole, the bottom end of the adjusting bolt protrudes out of the support plate, and the bottom end of the adjusting bolt is pressed against the pressing plate; When the first pipe and the second pipe are both in an undeformed state, the inner side walls of the two flanges are used to limit the rotation of the support plate.

4. The large deformation compensating sealing device according to claim 3, characterized in that: The cross section of the support plate perpendicular to the axial direction of the flange is in an arc shape, and the chord length of the arc is greater than the distance between the inner side walls of the two flanges; When the first pipe and the second pipe are both in an undeformed state, along the axial direction of the flange, the distance between the support plate and the inner side wall of the flange is less than or equal to 5 mm.

5. The large deformation compensating sealing device according to claim 1 or 2, characterized in that: The number of the double P-type sealing ring is one; the interiors of the two P-type parts are both hollow.

6. The large deformation compensating sealing device according to claim 1 or 2, characterized in that: The number of the adjusting and clamping mechanisms is at least two, and at least two of the adjusting and clamping mechanisms are arranged at intervals along the circumference of the flange.

7. The large deformation compensating sealing device according to claim 3, characterized in that: The spring is sleeved on the adjusting bolt, one end of the spring is connected to the elastic connecting piece, and the other end of the spring is connected to the supporting plate.

8. The large deformation compensating sealing device according to claim 3, characterized in that: A groove is formed on the upper surface of the clamping plate close to the supporting plate, and the bottom end of the adjusting bolt extends into the groove.

9. The large deformation compensating sealing device according to claim 3, characterized in that: The elastic connecting piece is provided with a through hole, the adjusting bolt comprises a stem and a head, and the through hole is used for the stem of the adjusting bolt to pass through.

10. The large deformation compensating sealing device according to claim 1, characterized in that: The elastic connecting member is an annular spring plate, which is sleeved on the circumferential outer surfaces of the two flanges. Along the axial direction of the flanges, two ends of the annular spring plate are respectively connected to the two flanges.

11. The large deformation compensating sealing device according to claim 10, characterized in that: Along the axial direction of the flange, two ends of the annular spring plate are connected to the two flanges through two fastener groups respectively; Each of the fastener groups includes a plurality of fastening bolts, and the plurality of fastening bolts are arranged at intervals along the circumference of the flange. Each of the flanges is provided with a plurality of connection holes corresponding to the plurality of fastening bolts one by one.

12. The large deformation compensating sealing device according to claim 1, characterized in that: Along the axial direction of the flange, the distance between the inner side walls of the two flanges is greater than the width of the butt joint interval between the first pipe and the second pipe.

13. The large deformation compensating sealing device according to claim 1, characterized in that: The axial direction of the first pipeline is parallel to the axial direction of the second pipeline, and the two flanges are fixedly connected to the first pipeline and the second pipeline respectively; The two flanges both have inner holes, wherein the inner hole of one flange is sleeved on the outer surface of the first pipe, and the inner hole of the other flange is sleeved on the outer surface of the second pipe.

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