A large deformation compensation sealing device

Abstract

The application discloses a large-deformation compensation sealing device, which comprises a sealing assembly, adjacent first and second pipes, and the sealing assembly is arranged at the abutting interval of the first and second pipes; the sealing assembly comprises a flange group, double P-shaped sealing rings, an elastic connecting piece and an adjusting and pressing mechanism; the flange group comprises two flanges, which are respectively arranged on the first and second pipes and are connected through the elastic connecting piece; the adjusting and pressing mechanism comprises a spring, an adjusting member and a pressing plate; the adjusting member is connected with the elastic connecting piece through the spring, the adjusting member abuts against the pressing plate, and the pressing plate presses the outer ring of the double P-shaped sealing ring; the large-deformation compensation sealing device can effectively compensate the large deformation of the pipes, improve the adaptability to the large deformation, and maintain the long-term stable sealing of the pipe connecting position.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sealing, in particular to a large deformation compensation sealing device. BACKGROUND

[0002] The pipeline expansion joint, also known as compensator, is used to compensate the large displacement deformation of the two sides of the pipeline to ensure the sealing effect when the displacement deformation of the two sides of the pipeline occurs.

[0003] At present, the sealing of the pipeline expansion joint is mostly welded with the U-shaped pipe and the two sides of the pipeline, and the deformation of the corrugated part in the U-shaped pipe is used for compensation. The sealing between the existing compressed air chamber lining is mostly a sealing strip.

[0004] However, the existing sealing structure is complex in processing, the weld joint is prone to leakage, the sealing performance is poor, and the ability to adapt to large deformation is weak. SUMMARY

[0005] The present application provides a large deformation compensation sealing device, which aims to at least solve the technical problems of poor sealing performance and weak ability to adapt to large deformation of the sealing structure in the prior art.

[0006] The present application provides a large deformation compensation sealing device, comprising a sealing assembly, adjacent first and second pipelines, and a butt joint interval between the first and second pipelines, the sealing assembly being arranged at the butt joint interval of the first and second pipelines;

[0007] The sealing assembly comprises a flange group, a double P-shaped sealing ring, an elastic connecting piece and an adjusting and pressing mechanism, the flange group comprises two flanges, the two flanges are respectively installed on the first and second pipelines, and the two flanges are connected by the elastic connecting piece;

[0008] The double P-shaped sealing ring is installed between the two flanges, the double P-shaped sealing ring is wrapped outside the first and second pipelines, and the double P-shaped sealing ring comprises a main body part and two P-shaped parts connected at both ends of the main body part;

[0009] The adjusting and pressing mechanism comprises a spring, an adjusting member and a pressing plate, the adjusting member is connected with the elastic connecting piece by the spring, the adjusting member abuts against the pressing plate, and the pressing plate presses the outer ring of the double P-shaped sealing ring, so that the two P-shaped parts abut against the outer surfaces of the first and second pipelines respectively, and the spring is in a compressed state when the first and second pipelines are in an undeformed state.

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

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

[0012] The adjusting bolt penetrates through the elastic connecting piece, a threaded through hole is formed on the support plate, the adjusting bolt is screwed with 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 abuts against the pressing plate.

[0013] When the first pipeline and the second pipeline 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 shape of the cross section of the support plate perpendicular to the axial direction of the flange is arc-shaped, and the chord length of the arc-shaped is greater than the distance between the inner side walls of the two flanges.

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

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

[0017] Optionally, the number of the adjusting and pressing mechanisms is at least two, and the at least two adjusting and pressing mechanisms are arranged at intervals in the circumferential direction of the flange.

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

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

[0020] Optionally, a through hole is formed on the elastic connecting piece, the adjusting bolt comprises a rod part and a head part, and the through hole is used for the rod part of the adjusting bolt to penetrate through.

[0021] Optionally, the elastic connecting piece is a ring-shaped spring plate, the ring-shaped spring plate is sleeved on the circumferential outer surface of the two flanges, and the two ends of the ring-shaped spring plate are connected with the two flanges in the axial direction of the flange.

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

[0023] Each fastener group comprises a plurality of fastening bolts, and the plurality of fastening bolts are arranged in a circumferential direction of the flange.

[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 abutting interval of the first pipeline and the second pipeline.

[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 each have an inner hole, and the inner hole of one of the flanges is sleeved on the outer surface of the first pipeline, and the inner hole of the other flange is sleeved on the outer surface of the second pipeline.

[0027] In the embodiment of the present application, when the first pipeline and the second pipeline are in an undeformed state, the spring is in a compressed state, and under the action of the spring force of the spring, the adjusting member abuts against the pressing plate, and the double P-shaped sealing ring is pressed by the pressing plate, thereby ensuring the sealing effect. When the first pipeline and / or the second pipeline is deformed, the elasticity of the spring enables the adjusting member and the pressing plate to adapt and continue to press the double P-shaped sealing ring, thereby maintaining the sealing performance. Therefore, the large deformation compensation sealing device provided by the embodiment of the present application can effectively compensate for the large deformation of the pipeline, improve the adaptability to large deformation, and maintain the long-term stable sealing of the pipeline connection, thereby ensuring the sealing effect and improving the reliability and safety of the system. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced.

[0029] Figure 1 Structure diagram of the large deformation compensation sealing device provided by the embodiment of the present application Figure One ;

[0030] Figure 2 Structure diagram of the large deformation compensation sealing device provided by the embodiment of the present application Figure Two .

[0031] Reference signs:

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

[0033] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0034] The embodiments of the present application are only used to explain the present application, and are not used to limit the scope of the present application. In the following paragraphs, the present application is described in more detail with reference to the drawings by way of example. It should be noted that the drawings are all very simplified and use non-precise proportions, only for the purpose of facilitating and clearly assisting the description of the embodiments of the present application.

[0035] At present, the sealing of the pipe expansion joint is mostly welding of the U-shaped pipe with the two side pipes, and the deformation of the U-shaped part is used for compensation. The sealing between the existing compressed air chamber lining is mostly a sealing strip. However, the existing sealing structure is complex to process, the weld joint is prone to leakage, the sealing performance is poor, and the ability to adapt to large deformation is weak. In order to solve the above problems, the embodiments of the present application provide a large deformation compensation sealing device, which will be described in detail below.

[0036] Referring to Figure 1 and Figure 2 , the embodiments of the present application provide a large deformation compensation sealing device, which comprises a sealing assembly, adjacent first pipe 1 and second pipe 2, the first pipe 1 and the second pipe 2 have a butt joint interval 8, the sealing assembly is arranged at the butt joint interval 8 of the first pipe 1 and the second pipe 2; the sealing assembly comprises a flange group, a double P type sealing ring 5, an elastic connecting piece 4 and an adjusting and pressing mechanism 6, the flange group comprises 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 through the elastic connecting piece 4; the double P type sealing ring 5 is installed between the two flanges 3, the double P type sealing ring 5 is wrapped outside the first pipe 1 and the second pipe 2, the double P type sealing ring 5 comprises a main body part and two P type parts 51 connected at both ends of the main body part respectively; the adjusting and pressing mechanism 6 comprises a spring 61, an adjusting member and a pressing plate 64, the adjusting member is connected with the elastic connecting piece 4 through the spring 61, the adjusting member abuts against the pressing plate 64, and the pressing plate 64 presses the outer ring of the double P type sealing ring 5, so that the two P type parts 51 abut against the outer surfaces of the first pipe 1 and the second pipe 2 respectively, and the first pipe 1 and the second pipe 2 are in an undeformed state, and the spring 61 is in a compressed state.

[0037] The large deformation compensation sealing device provided in this embodiment of the invention can be applied to sealing large pipeline expansion joints, and also to sealing the linings of compressed air chambers. This large deformation compensation sealing device is preferably applied to scenarios such as sealing large pipeline expansion joints and compressed air chambers.

[0038] The first pipe 1 and the second pipe 2 are adjacent, with a mating gap 8 between them. A sealing assembly is located at the mating gap 8 between the first pipe 1 and the second pipe 2. The two flanges in the flange assembly can be symmetrically arranged. An elastic connector 4 connects the two flanges 3. When one flange 3 deforms with the deformation of the pipe, the relative position of the two flanges 3 changes. At this time, the elastic connector 4 can adapt to the positional 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 component 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 spring 61 provides elasticity in the radial direction of the flange 3 to clamp 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, where 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. There can be one or more double P-type sealing rings 5. Preferably, there is one double P-type sealing ring 5. The outer ring of the double P-type sealing ring 5 abuts against the pressure plate 64, and the inner ring of the double P-type sealing ring 5 abuts against the outer surfaces of the first pipe 1 and the second pipe 2. The inner sidewalls of the two flanges 3 are the sidewalls on the two flanges 3 that are opposite to and close to each other. When both the first pipe 1 and the second pipe 2 are in an undeformed state, the spring 61 is in a compressed state. At this time, the compression 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 walls of the two flanges 3 is greater than the width of the mating interval 8 between the first pipe 1 and the second pipe 2. The axial direction of the flange 3 can be referenced... Figure 1 The direction indicated by arrow A. The axial direction of the first pipe 1 is parallel to the axial direction of the second pipe 2. Two flanges 3 are fixedly connected to the first pipe 1 and the second pipe 2 respectively. Both flanges 3 have inner holes, with the inner hole of one flange 3 fitting onto the outer surface of the first pipe 1 and the inner hole of the other flange 3 fitting onto 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 pipeline 1 and the second pipeline 2 are in the undeformed state, the spring 61 is in the compressed state, under the spring force of the spring 61, the adjusting member abuts against the pressing plate 64, the double P-shaped sealing ring 5 is pressed by the pressing plate 64, and the sealing effect is ensured. When the first pipeline 1 and / or the second pipeline 2 is deformed, the elastic effect of the spring 61 enables the adjusting member and the pressing plate 64 to adapt to the deformation and continue to press the double P-shaped sealing ring 5, so that the sealing performance is maintained. In the case of pipeline deformation, the deformation adaptability of the double P-shaped sealing ring 5 can keep the two P-shaped parts 51 closely fitted with the outer surfaces of the first pipeline 1 and the second pipeline 2, so that effective sealing is realized. It should be noted that the deformation of the first pipeline 1 and / or the second pipeline 2 can be axial deformation, radial deformation, or simultaneous axial and radial deformation.

[0042] For example, referring to Figure 1 At this time, the first pipeline 1 and the second pipeline 2 are in the undeformed state, and the spring 61 is in the compressed state. Under the spring force of the spring 61, the adjusting member abuts against the pressing plate 64, the double P-shaped sealing ring 5 is pressed by the pressing plate 64, and the two P-shaped parts 51 abut against the outer surfaces of the first pipeline 1 and the second pipeline 2, respectively. Referring to Figure 2 When the second pipeline 2 is deformed to the right and downward, the flange 3 connected with the second pipeline 2 is deformed along with the deformation of the second pipeline 2. At this time, the elastic connecting piece 4 is elastically deformed to adapt to the deformation of the flange 3, and the spring 61 is elongated. Under the spring force of the spring 61, the adjusting member is pushed to abut against the pressing plate 64, so that the pressing plate 64 presses the double P-shaped sealing ring 5, and the two P-shaped parts 51 abut against the outer surfaces of the first pipeline 1 and the second pipeline 2, respectively. It should be noted that when the first pipeline 1 and / or the second pipeline 2 is deformed, the spring 61 can still be in the compressed state after elongation. Specifically, the lower end surfaces of the two P-shaped parts 51 abut against the outer surfaces of the first pipeline 1 and the second pipeline 2, respectively.

[0043] When the first pipeline 1 and the second pipeline 2 are in the undeformed state, the spring 61 is in the compressed state, under the spring force of the spring 61, the adjusting member abuts against the pressing plate 64, the double P-shaped sealing ring 5 is pressed by the pressing plate 64, and the sealing effect is ensured. When the first pipeline 1 and / or the second pipeline 2 is deformed, the elastic effect of the spring 61 enables the adjusting member and the pressing plate 64 to adapt to the deformation and continue to press the double P-shaped sealing ring 5, so that the sealing performance is maintained. Therefore, the large deformation compensation sealing device provided by the embodiment of the present application can effectively compensate for the large deformation of the pipeline, improve the adaptability to large deformation, and maintain the long-term stable sealing of the pipeline connection, ensure the sealing effect, and improve the reliability and safety of the system.

[0044] In a preferred embodiment of the present application, 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 pipeline 1 and the second pipeline 2, the sealing space 9 is in communication with the high-pressure side area 10, and the pressure of the high-pressure side area 10 is used to make the two P-type portions 51 abut against the inner side walls of the two flanges 3, respectively.

[0045] The outer side of the first pipeline 1, the second pipeline 2 and the sealing assembly is formed with a low-pressure side area. The sealing space 9 is in communication with the high-pressure side area 10 through the butt joint 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 of the two P-type portions 51 in the double P-type sealing ring 5 and the inner side walls of the flanges 3 can be enhanced, and thus the sealing effect can be improved. When the pipeline deforms, for example, the second pipeline 2 deforms 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 portions 51 in the double P-type sealing ring 5 evert to both sides, thereby abutting against the inner side walls of the two flanges 3, respectively, to further improve the ability to adapt to large deformation, thereby ensuring that the sealing can still be maintained in the case of large deformation of the pipeline.

[0046] In a preferred embodiment of the present application, the adjusting member includes a support plate 63 and an adjusting bolt 62. The support plate 63 and the pressing plate 64 are both located between the two flanges 3 in the flange group, and the support plate 63 is connected to the elastic connecting piece 4 through the spring 61. The adjusting bolt 62 penetrates the elastic connecting piece 4, the support plate 63 is provided with a threaded hole, the adjusting bolt 62 is screwed with the threaded hole, the bottom end of the adjusting bolt 62 protrudes from the support plate 63, and the bottom end of the adjusting bolt 62 abuts against the pressing plate 64. 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 are used to limit the rotation of the support plate 63.

[0047] The support plate 63 is preferably not in contact with the pressing plate 64. The shape of the cross section of the support plate 63 perpendicular to the axial direction of the flange 3 is arc-shaped, and the shape of the cross section of the pressing plate 64 perpendicular to the axial direction of the flange 3 is arc-shaped. The radian of the arc is preferably less than π. The threaded 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, the support plate 63 will not rotate together.

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

[0049] When the pipeline is in the 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 can include: when the pipeline is in the undeformed state, the bottom end of the adjusting bolt 62 is tightly pressed by the double P-shaped sealing ring 5 and the pressing plate 64, the adjusting bolt 62 is rotated to move the support plate 63 towards the elastic connecting piece 4, so that the support plate 63 tightly presses the spring 61, and the compression amount of the spring 61 is adjusted.

[0050] When the second pipeline 2 deforms to the right and downward, the spring 61 is elongated, 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 that is threadedly connected with the support plate 63 to tightly press the pressing plate 64 downward, moving the pressing plate 64 downward, and further pushing the double P-shaped sealing ring 5 to move downward, so that the lower end faces of the two P-shaped parts 51 tightly press the outer surfaces of the first pipeline 1 and the second pipeline 2 respectively, to compensate for the deformation of the second pipeline 2. It should be noted that after the first pipeline 1 and / or the second pipeline 2 deforms, 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 application, the number of the double P-shaped sealing ring 5 is one; the interiors of the two P-shaped parts 51 are hollow. When the double P-shaped sealing ring 5 is not deformed, the cross-sectional shape of the hollow part of the P-shaped part 51 can be circular, oval, etc. The interior of the P-shaped part 51 is hollow, which is conducive to the deformation of the P-shaped part 51, enhances the deformation ability of the P-shaped part 51, and further enhances the deformation ability of the double P-shaped sealing ring 5. In addition, when the interior of the P-shaped part 51 is hollow, the material usage of the double P-shaped sealing ring 5 is reduced.

[0052] In a preferred embodiment of the present application, the number of the adjusting and pressing mechanism 6 is at least two, and the at least two adjusting and pressing mechanisms 6 are arranged in a circumferential direction of the flange 3. The number of the adjusting and pressing mechanism 6 can be two, three, four, etc. The at least two adjusting and pressing mechanisms 6 are preferably uniformly arranged in the circumferential direction of the flange 3. Through the arrangement of the at least two adjusting and pressing mechanisms 6, the double P-shaped sealing ring 5 can be uniformly stressed in the circumferential direction of the flange 3, to ensure the sealing effect.

[0053] In a preferred embodiment of the present application, the spring 61 is sleeved on the adjusting bolt 62, one end of the spring 61 is connected with the elastic connecting piece 4, and the other end of the spring 61 is connected with the support plate 63. The pressing plate 64 is provided with a groove on the upper surface close to the support plate 63, and the bottom end of the adjusting bolt 62 extends into the groove. The elastic connecting piece 4 is provided with a through hole, and the adjusting bolt 62 includes a rod part and a head part, and the through hole is used for the rod part 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 pressing plate 64 corresponds to the position of the threaded hole on the support plate 63. Through the arrangement of the groove, the bottom end of the adjusting bolt 62 can be stably abutted against the pressing plate 64. Through the arrangement of the through hole on the elastic connecting piece 4, the rod part of the adjusting bolt 62 can pass through the elastic connecting piece 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 pipeline 2 deforms to the right and downward, the flanges 3 connected with the second pipeline 2 deform with the deformation of the second pipeline 2. At this time, the elastic connecting piece 4 deforms elastically to adapt to the deformation of the flanges 3. After the elastic connecting piece 4 deforms elastically, the positions of the adjusting bolt 62, the spring 61, the support plate 63 and the pressing plate 64 change correspondingly to ensure that the pressing plate 64 can continue to press the outer ring of the double P type sealing ring.

[0056] In a preferred embodiment of the present application, the elastic connecting piece 4 is a ring-shaped spring plate, which is sleeved on the circumferential outer surface of the two flanges 3, and the two ends of the ring-shaped spring plate are connected with the two flanges 3 in the axial direction of the flanges 3. In the axial direction of the flanges 3, the two ends of the ring-shaped spring plate are connected with the two flanges 3 through two fastener groups respectively; each fastener group includes a plurality of fastening bolts 7, and the plurality of fastening bolts 7 are arranged in the circumferential direction of the flanges 3 at intervals; and a plurality of connecting holes corresponding to the plurality of fastening bolts 7 are formed in each flange 3.

[0057] Wherein, when one of the flanges 3 deforms with the deformation of the pipeline, the relative positions of the two flanges 3 change, at this time, the ring-shaped spring plate can adapt to the position change of the two flanges 3 through the elastic deformation of itself. The number of fastening bolts 7 included in each fastener group can be set according to actual needs, which is not limited in the embodiment. The plurality of fastening bolts 7 are preferably uniformly arranged in the circumferential direction of the flanges 3. The flange 3 can include a main body part and an edge protrusion connected to the outer edge of the main body part, and the connecting hole can pass through the edge protrusion. The connecting hole can be a threaded hole, and at this time, the fastening bolt 7 is threadedly connected with the connecting hole.

[0058] In summary, in the large deformation compensation sealing device provided by the embodiment of the present application, the first pipeline 1 and the second pipeline 2 are 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 with the support plate 63 to abut against the pressing plate 64. The outer ring of the double P type sealing ring 5 is pressed by the pressing plate 64, and the two P type parts 51 abut against the outer surfaces of the first pipeline 1 and the second pipeline 2 respectively. At the same time, the pressure of the high-pressure side area 10 acts on the double P type sealing ring 5 to make the two P type parts 51 abut against the inner side walls of the two flanges 3 respectively.

[0059] When the second pipeline 2 is deformed to the right and downward, the spring 61 is elongated, and under the action of the spring force of the spring 61, the supporting plate 63 is pushed downward, thereby pushing the adjusting bolt 62 threaded with the supporting plate 63 downward to abut and press the pressing plate 64, so that the pressing plate 64 moves downward, and in turn pushes the double P-shaped sealing ring 5 to move downward, so that the lower end faces of the two P-shaped parts 51 abut the outer surfaces of the first pipeline 1 and the second pipeline 2 respectively, and at the same time, the pressure of the high-pressure side area 10 continues to act on the double P-shaped sealing ring 5, so that the two P-shaped parts 51 of the double P-shaped sealing ring 5 are turned outward to the two sides, thereby abutting the inner side walls of the two flanges 3 respectively, so as to compensate for the deformation of the second pipeline 2.

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

[0061] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include" "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or equipment including the element.

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

[0063] The various embodiments in the specification are described in a related manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments. In particular, the system embodiments are described simply because they are basically similar to the method embodiments, and the relevant parts can be referred to the description of the method embodiments.

[0064] The above only describes the preferred embodiments of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application is included in the protection scope of the present application.

[0065] The large deformation compensation sealing device provided by the present application is described in detail above, and the principle and implementation manner of the present application are described by applying specific examples. The above embodiment description is only used to help understand the structure of the present application and its core idea. Meanwhile, for those skilled in the art, the specific implementation manner and application range will be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A large deformation compensating sealing device, characterized by, The sealing assembly is arranged at the abutting interval of the first pipeline and the second pipeline; The sealing assembly comprises a flange group, a double P-shaped sealing ring, an elastic connecting piece and an adjusting and pressing mechanism, the flange group comprises two flanges, the two flanges are respectively arranged on the first pipeline and the second pipeline, and the two flanges are connected through the elastic connecting piece; The double P-shaped sealing ring is arranged between the two flanges, the double P-shaped sealing ring surrounds the outside of the first pipeline and the second pipeline, the double P-shaped sealing ring comprises a main body part and two P-shaped parts connected to the two ends of the main body part respectively; The adjusting and pressing mechanism comprises a spring, an adjusting member and a pressing plate, the adjusting member is connected to the elastic connecting piece through the spring, the adjusting member abuts against the pressing plate, and the pressing plate presses the outer ring of the double P-shaped sealing ring, so that the two P-shaped parts abut against the outer surfaces of the first pipeline and the second pipeline respectively, and the spring is in a compressed state when the first pipeline and the second pipeline are in an undeformed state. A sealing space is formed in the inner side of the double P-shaped sealing ring, high-pressure side areas are formed in the inner sides of the first pipeline and the second pipeline, the sealing space is communicated with the high-pressure side areas, and the pressure of the high-pressure side areas is used to make the two P-shaped parts abut against the inner side walls of the two flanges respectively.

2. The large deformation compensating seal apparatus of claim 1, wherein, The adjusting member comprises a support plate and an adjusting bolt, the support plate and the pressing plate are both located between the two flanges in the flange group, and the support plate is connected to the elastic connecting piece through the spring; The adjusting bolt penetrates through the elastic connecting piece, a threaded through hole is formed in the support plate, the adjusting bolt is screwed with 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 abuts against the pressing plate; When the first pipeline and the second pipeline are in the undeformed state, the inner side walls of the two flanges are used to limit the rotation of the support plate.

3. The large deformation compensating seal apparatus of claim 2, wherein, The shape of the cross section of the support plate perpendicular to the axial direction of the flange is arc-shaped, and the chord length of the arc-shaped cross section is greater than the distance between the inner side walls of the two flanges; When the first pipeline and the second pipeline are in the undeformed state, the distance between the support plate and the inner side walls of the flange in the axial direction of the flange is less than or equal to 5 mm.

4. The large deformation compensating seal apparatus of claim 1, wherein, The number of the double P-shaped sealing rings is one, and the interiors of the two P-shaped parts are hollow.

5. The large deformation compensating seal apparatus of claim 1, wherein, The number of the adjusting and pressing mechanisms is at least two, and the at least two adjusting and pressing mechanisms are arranged at intervals in the circumferential direction of the flange.

6. The large deformation compensating seal apparatus of claim 2, wherein, 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 support plate.

7. The large deformation compensating seal apparatus of claim 2, wherein, A groove is formed in the upper surface of the support plate close to the pressing plate, and the bottom end of the adjusting bolt extends into the groove.

8. The large deformation compensating seal apparatus of claim 2, wherein, A through hole is formed in the elastic connecting piece, the adjusting bolt comprises a rod part and a head part, and the through hole is used for allowing the rod part of the adjusting bolt to penetrate through.

9. The large deformation compensating seal apparatus of claim 1, wherein, The elastic connecting piece is a ring-shaped spring plate, which is sleeved on the circumferential outer surfaces of the two flanges, and two ends of the ring-shaped spring plate are connected with the two flanges in the axial direction of the flanges.

10. The large deformation compensating seal apparatus of claim 9, wherein, The two ends of the ring-shaped spring plate are connected with the two flanges through two fastener groups in the axial direction of the flanges. Each fastener group comprises a plurality of fastening bolts, which are arranged at intervals in the circumferential direction of the flanges, and a plurality of connecting holes corresponding to the fastening bolts are formed in each flange.

11. The large deformation compensating seal apparatus of claim 1, wherein, The distance between the inner side walls of the two flanges in the axial direction of the flanges is greater than the width of the abutment interval of the first pipeline and the second pipeline.

12. The large deformation compensating seal apparatus of claim 1, wherein, 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 each have an inner hole, and the inner hole of one of the flanges is sleeved on the outer surface of the first pipeline, and the inner hole of the other flange is sleeved on the outer surface of the second pipeline.

Images