Casing pipe type pipeline sealing isolation valve

Abstract

The invention relates to a casing pipe type pipeline sealing isolation valve which comprises a connecting valve body and a sealing device, the connecting valve body comprises an inner pipe body and an outer pipe body which are coaxially arranged, an inner flow channel is formed in the inner pipe body, an outer flow channel is formed between the inner pipe body and the outer pipe body, and a mounting through hole extending in the radial direction of the connecting valve body is formed in the connecting valve body; the isolating valve core is mounted in the mounting through hole and is provided with an inner hole for communicating with the inner flow channel and an outer hole for communicating with the outer flow channel; the elastic sealing assemblies are arranged at the two ends of the outer hole in the axial direction of the outer flow channel; and the valve body sealing element is mounted on the connecting valve body and is propped against the elastic sealing assembly. The sealing device can meet the requirement that sealing of a casing pipe type pipeline system in the related technology needs to isolate media of an inner pipeline and an outer pipeline under the conditions of large temperature difference and high pressure.

Description

Technical Field

[0001] This application relates to the field of pipeline isolation valves, and in particular to a sleeve-type pipeline sealing isolation valve. Background Technology

[0002] In a sleeve-type high-temperature flow pipeline system, the fluid medium, pressure, and temperature passing through the inner sleeve and outer sleeve are different. For example, in a certain pipeline system, the medium in the inner sleeve is helium, with a temperature of about 700°C and a pressure of about 13 MPa, while the medium in the outer sleeve is helium, with a temperature of about 250°C and a pressure of about 7 MPa.

[0003] When maintenance is required on the casing, an isolation valve needs to be installed in the casing. The casing-type pipeline system includes an inner casing and an outer casing. Under conditions of high temperature and large temperature difference, high pressure and large pressure difference, the isolation valve needs to be able to isolate the fluid media in the pipelines before and after the inner casing and the outer casing, and also needs to ensure that the media inside and outside the casing cannot penetrate each other, which brings a severe challenge to the design of the isolation valve. Summary of the Invention

[0004] This application provides a sleeve-type pipeline sealing isolation valve to meet the sealing requirements of sleeve-type pipeline systems in related technologies, which require isolating internal and external pipeline media under conditions of large temperature difference and high pressure.

[0005] This application provides a sleeve-type pipeline sealing isolation valve, which includes: A connecting valve body includes an inner tube and an outer tube arranged coaxially. An inner flow channel is provided in the inner tube, and an outer flow channel is formed between the inner tube and the outer tube. The connecting valve body is provided with a mounting through hole extending radially therefrom. An isolation valve core is installed in the mounting through hole and has an inner hole for connecting the inner flow channel and an outer hole for connecting the outer flow channel. An elastic sealing assembly is disposed at both ends of the outer hole along the axial direction of the outer flow channel; In addition, a valve body seal is mounted on the connecting valve body and abuts against the resilient sealing assembly.

[0006] In one embodiment, the isolation valve core includes: An inner flow section, wherein the inner hole is disposed on the inner flow section, and the diameter of the inner flow section is adapted to the diameter of the mounting through hole; In addition, an outflow portion is coaxially arranged with the inflow portion, an outer hole is provided on the outflow portion, and the diameter of the outflow portion is smaller than that of the inflow portion, so that a placement space is formed between the outflow portion and the connecting valve body, and the elastic sealing assembly is disposed in the placement space.

[0007] In one embodiment, the resilient sealing assembly includes: A compression collar is fitted onto the outflow portion and has a through hole corresponding to the outer hole. Both ends of the compression collar are provided with abutment portions. The abutment portions are spaced apart from the connecting valve body and the outflow portion to form a sealing cavity. The valve body seal abuts against the abutment portions. Additionally, there are two elastic compression members provided at both ends of the compression sleeve. The elastic compression members abut against the abutting part and can deform and squeeze into the sealing cavity under the compression of the valve body seal.

[0008] In one embodiment, the resilient sealing assembly further includes: The force transmission pad is disposed at both ends of the compression sleeve and abuts against the elastic telescopic member.

[0009] In one embodiment, the elastic compression member includes a graphite sealing ring, which is sleeved on the two abutment portions.

[0010] In one embodiment, the isolation valve core further includes a valve core extension portion connected to the outflow portion and extending from the mounting through hole, and the valve body seal includes: A sealing plug is fitted onto the protruding part of the valve core and abuts against the elastic sealing assembly; And a connecting plate, which is disposed on the sealing plug and is detachably connected to the connecting valve body.

[0011] In one embodiment, the valve body seal further includes: A sealing gasket is disposed between the sealing plug and the valve core protrusion, and between the sealing plug and the connecting valve body.

[0012] In one embodiment, a sleeve-type pipeline sealing isolation valve further includes: A rotating component, which is connected to the isolation valve core, and is used to drive the isolation valve core to rotate around its own axis.

[0013] In one embodiment, the rotating member includes: Turn the handwheel, which connects to the isolation valve core and is located outside the connecting valve body.

[0014] In one embodiment, a piping system further includes: An extension section is provided at both ends of the inner tube and the outer tube in the axial direction and is used to connect the sleeve system.

[0015] The beneficial effects of the technical solution provided in this application include: connecting the inner tube of the sleeve system through the inner flow channel of the inner tube body on the connecting valve body, and connecting the outer tube of the sleeve system through the outer flow channel between the inner tube body and the outer tube body; simultaneously, rotatably installing the isolation valve core in the mounting through hole of the connecting valve body; the isolation valve core has an inner hole corresponding to the inner flow channel and an outer hole corresponding to the outer flow channel; the isolation valve core has a first position and a second position in the mounting through hole; when the isolation valve core is in the first position, the inner hole communicates with the inner flow channel and the outer hole communicates with the outer flow channel, so as to realize the fluid flow between the inner and outer tubes in the sleeve system; when the isolation valve core is in the second position, the side wall of the isolation valve core without the inner hole and the outer hole abuts against the inner flow channel and the outer flow channel, thereby blocking the fluid flow of the sleeve system and realizing the blocking effect. Furthermore, two sets of elastic seals are provided at both ends of the outer hole along the axial direction, and valve body seals are provided on the connecting valve body. While achieving sealing of the inside of the connecting valve body, pressure can also be applied to the valve body seals to cause the elastic seals to deform, thereby sealing the position where the inner hole and outer hole are opened in the isolation valve core inside the connecting valve body, preventing the possibility of fluid leakage between the inner and outer flow channels, and thus isolating the medium of the inner and outer tubes under conditions of large temperature difference and high pressure.

[0016] This application provides a sleeve-type pipeline sealing isolation valve. Since it can seal the inner and outer sleeve media while isolating the inner and outer sleeve media in the sleeve system, it can meet the requirement of the related technology that the sealing of the sleeve-type pipeline system needs to isolate the inner and outer pipeline media under the conditions of large temperature difference and high pressure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A three-dimensional cross-sectional view of a sleeve-type pipeline sealing isolation valve provided in an embodiment of this application; Figure 2 A cross-sectional view of a sleeve-type pipeline sealing isolation valve provided in an embodiment of this application; Figure 3 for Figure 2 A magnified view of part A in the middle; In the diagram: 1. Connecting valve body; 11. Inner tube body; 111. Inner flow channel; 12. Outer tube body; 121. Outer flow channel; 13. Extension section; 2. Isolation valve core; 21. Inner hole; 211. Inner flow part; 22. Outer hole; 221. Outer flow part; 222. Placement space; 23. Valve core protrusion; 3. Elastic sealing assembly; 31. Compression collar; 311. Abutment part; 312. Sealing cavity; 32. Elastic compression component; 33. Force transmission pad; 4. Valve body sealing component; 41. Sealing plug; 42. Connecting plate; 43. Sealing gasket; 5. Rotating component; 51. Rotating handwheel. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] This application provides a sleeve-type pipeline sealing isolation valve, which can solve the need for sealing sleeve-type pipeline systems in related technologies to isolate internal and external pipeline media under conditions of large temperature difference and high pressure.

[0021] Reference Figures 1-3This application discloses a sleeve-type pipeline sealing isolation valve, which includes a connecting valve body 1, an isolation valve core 2, an elastic sealing assembly 3, and a valve body sealing element 4. The connecting valve body 1 includes an inner tube 11 and an outer tube 12 arranged coaxially. An inner flow channel 111 is provided in the inner tube 11, and an outer flow channel 121 is formed between the inner tube 11 and the outer tube 12. In use, the inner flow channel 111 is connected to the inner tube of the sleeve, and the outer flow channel 121 is connected to the outer tube in the sleeve, so as to realize the flow between the inner and outer tubes of the sleeve system. The connecting valve body 1 is provided with a mounting through hole extending radially therefrom. The isolation valve core 2 is installed in the mounting through hole and is provided with an inner hole 21 for connecting the inner flow channel 111 and an outer hole 22 for connecting the outer flow channel 121. The isolation valve core 2 is located within the mounting through hole and has a first position and a second position. When the isolation valve core 2 is in the first position, the inner hole 21 communicates with the inner flow channel 111, and the outer hole 22 communicates with the outer flow channel 121, thereby enabling fluid flow in the casing system. When the isolation valve core 2 is in the second position, the sidewall of the isolation valve core 2 without the inner hole 21 and outer hole 22 abuts against the inner flow channel 111 and the outer flow channel 121, thereby blocking the flow between the inner and outer pipes in the casing system. In actual use, rotating the isolation valve core 2 to the first position allows the inner hole 21 to communicate with the inner flow channel 111, and the outer hole 22 to communicate with the outer flow channel 121, thus enabling normal flow between the inner and outer pipes of the casing. When it is necessary to block the flow of fluid in the casing, rotating the isolation valve core 2 to the second position blocks the flow of fluid between the inner and outer pipes in the casing system.

[0022] The elastic sealing assembly 3 is axially disposed at both ends of the outer hole 22 along the outer flow channel 121. The valve body seal 4 is installed on the connecting valve body 1 to seal the connection between the isolation valve core and the mounting through hole, and the valve body seal 4 abuts against the elastic sealing assembly 3. When the isolation valve core 2 is rotated so that its side wall abuts against the inner flow channel 111 and the outer flow channel 121, pressure is applied to the valve body seal 4, thereby causing the elastic sealing assembly 3 to deform on both sides of the outer hole 22, thereby sealing the inner flow channel 111 and the outer flow channel 121, preventing fluid leakage between the inner flow channel 111 and the outer flow channel 121, and meeting the sealing requirements of the sleeve-type pipeline system in related technologies to isolate the internal and external pipeline media under conditions of large temperature difference and high pressure.

[0023] Furthermore, in one embodiment of this application, the isolation valve core 2 includes an inner flow portion 211 and an outer flow portion 221. An inner hole 21 is disposed on the inner flow portion 211, and the diameter of the inner flow portion 211 is adapted to the diameter of the mounting through hole. In order to further facilitate the flow of fluid inside the inner flow portion 211 when connected to the inner tube of the sleeve, the diameter of the inner hole 21 is adapted to the diameter of the inner flow channel 111. The outer flow portion 221 is coaxially disposed with the inner flow portion 211, and an outer hole 22 is disposed on the outer flow portion 221. The diameter of the outer flow portion 221 is smaller than that of the inner flow portion 211, so that a placement space 222 is formed between the outer flow portion 221 and the connecting valve body 1. The elastic sealing component 3 is disposed in the placement space 222. By applying the valve body sealing component 4 to the elastic sealing component 3, the elastic sealing component 3 deforms on both sides of the outer hole 22, thereby achieving the sealing of the outer flow channel 121. In this embodiment, both the inner flow portion 211 and the outer flow portion 221 are cylindrical, and the axial height of the outer hole 22 is adapted to the outer flow portion 221 to facilitate the flow of fluid within the inner and outer sleeves of the sleeve system. Furthermore, since the inner flow channel 111 and the outer flow channel 121 within the connecting valve body 1 are coaxially arranged, by adjusting the pressure applied to the valve body seal 4, the elastic deformation of the elastic sealing assembly 3 and the axial force are transmitted to the surface of the inner tube 11, thereby achieving synchronous sealing of the inner flow channel 111 and the outer flow channel 121.

[0024] In this embodiment, the elastic sealing assembly 3 includes a compression collar 31 and an elastic compression member 32. The compression collar 31 is sleeved on the outflow portion 221 and has a through hole corresponding to the outer hole 22 to facilitate fluid passage. Both axial ends of the compression collar 31 are provided with abutment portions 311. The abutment portions 311 are spaced apart from the connecting valve body 1 and the outflow portion 221 to form a sealing cavity 312. The valve body seal 4 abuts against the abutment portions 311 to transmit pressure towards the inner flow portion 211 through the abutment portions 311. Two elastic compression members 32 are provided at both axial ends of the compression collar 31. The elastic compression members 32 abut against the abutment portions 311 and can deform under the compression of the valve body seal 4 and squeeze into the sealing cavity 312, thereby achieving sealing of both axial ends of the outer hole 22.

[0025] To further improve the sealing performance of the inner flow channel 111, two outer flow sections 221 are coaxially arranged along the inner flow section 211. Each outer flow section 221 has an outer hole 22, and both outer holes 22 are adapted to the inner diameter of the outer flow channel 121. The elastic compression element 32 is specifically made of graphite sealing ring. Graphite itself has high temperature resistance and can undergo restorable deformation under pressure, thus enabling long-term use.

[0026] Furthermore, to facilitate the operator's application of pressure to the valve body seal 4 to deform the elastic compression members 32, the elastic sealing assembly 3 also includes a force transmission pad 33. The force transmission pad 33 is disposed at both ends of the clamping ring 31 in the axial direction and abuts against the two elastic compression members 32. When pressure is applied to the valve body seal 4, the pressure of the valve body seal 4 compresses the elastic compression members 32 through the force transmission pad 33, causing the upper elastic compression member 32 to deform first and be squeezed into the sealing cavity 312. Then, the pressure is transmitted through the clamping ring 31 to the elastic compression member 32 located axially below it, causing both ends of the elastic compression members 32 in the axial direction of the outer hole 22 to deform and be squeezed into the sealing cavity 312, thereby achieving a seal on the outer hole 22. In the embodiment of this application, with two outflow portions 221, after the valve body seal 4 is subjected to pressure and seals the upper outer hole 22, the valve body seal 4 continues to apply downward pressure. After both upper elastic compression members 32 are squeezed into the sealing cavity 312, the elastic deformation of the elastic compression members 32 reaches its peak. At this point, the pressure is transmitted through the inner flow portion 211 towards the lower elastic sealing assembly 3 until the two lower elastic compression members 32 are also squeezed into the sealing cavity 312. In practical use, the pressure on the valve body seal 4 can be set according to the actual elastic potential energy of the elastic compression members 32, thereby achieving a seal on the two outer holes 22.

[0027] Furthermore, since the two outer flow sections 221 are coaxially arranged at both ends of the inner flow section 211 in this embodiment, when the two elastic compression members 32 are squeezed into the sealing cavity 312, the two elastic sealing components 3 simultaneously clamp the inner flow section 211 at both ends of the inner tube 11, thereby simultaneously achieving the sealing of the two outer flow channels 121 and the inner flow channel 111.

[0028] In other embodiments of this application, the isolation valve core 2 can also be spherical in shape, with inner holes 21 and outer holes 22 corresponding to the positions and dimensions of the inner flow channel 111 and the outer flow channel 121. Rotation of the isolation valve core allows switching between the opening and sealing of the inner flow channel 111 and the outer flow channel 121. Furthermore, in other embodiments, the number of outer holes 22 on the connecting valve body 1 can be multiple according to actual operating conditions, thereby meeting the flow rate requirements of the fluid in the outer pipe under different operating conditions.

[0029] More specifically, in one embodiment of this application, the isolation valve core 2 further includes a valve core protrusion 23, which is connected to the outflow portion 221. In embodiments with multiple outflow portions 221, the valve core protrusion 23 is connected to the outflow portion 221 at the axial top and extends from the mounting through hole to facilitate connection with the valve body seal 4. The valve body seal 4 includes a sealing plug 41 and a connecting plate 42. The sealing plug 41 is sleeved on the valve core protrusion 23 and abuts against the elastic sealing assembly 3. In this embodiment, the sealing plug 41 abuts against the force transmission pad 33 at the axial top to achieve uniform force transmission in the axial direction. The connecting plate 42 covers the top of the sealing plug 41 and is detachably connected to the connecting valve body 1. In this embodiment, the connecting valve body 1 has a connecting end extending outward from one end with an installation through hole. The axial height of the sealing plug 41 is higher than the height of the connecting end of the connecting valve body 1. The connecting end of the connecting valve body 1 is connected to the connecting plate 42 through a flange. When installing the connecting valve body 1, the orientation of the isolation valve core 2 is first adjusted according to the actual working conditions to open or seal the inner tube 11 and the outer tube 12. After determining the orientation, the connecting plate 42 is pressed onto the sealing plug 41, and a preset pressure is applied to the connecting plate 42 with the help of hydraulic tools, so that the two elastic compression members 32 inside are squeezed into the sealing cavity 312. Then, the connecting plate 42 and the connecting end of the connecting valve body 1 are locked to fix the state of the valve body. The structure is simple and easy to adjust.

[0030] Furthermore, to enhance the sealing performance at the mounting through-hole on the connecting valve body 1, a sealing gasket 43 is also fitted onto the sealing plug 41. Sealing gaskets 43 are fitted between the sealing plug 41 and the valve core protrusion 23, as well as between the sealing plug 41 and the connecting valve body 1, thereby achieving a seal at the mounting through-hole and reducing the possibility of fluid leakage. The material selection for the sealing gasket 43 needs to be based on the properties, temperature, pressure, and chemical compatibility of the erosive medium selected in the actual working conditions to ensure the long-term reliable sealing performance of the sealing gasket 43. Specifically, in conventional water-based fluids or low-temperature environments, EPDM rubber is preferred due to its excellent water resistance, aging resistance, and elastic recovery ability; for hydraulic oil erosive media, nitrile rubber is an ideal choice, as it effectively resists oil erosion and maintains high sealing strength; in highly corrosive chemical environments (such as acid and alkali media), fluororubber or polytetrafluoroethylene is recommended. The former has excellent heat resistance and chemical stability, while the latter is known for its low coefficient of friction and broad-spectrum corrosion resistance. Furthermore, in applications with stringent hygiene requirements, such as food and pharmaceutical manufacturing, silicone materials that meet FDA standards should be selected to ensure they are non-toxic, odorless, and easy to clean. Through proper material selection, the sealing gasket 43 not only adapts to diverse operating conditions but also significantly improves system durability, thereby achieving efficient sealing of mounting holes and greatly reducing the possibility of fluid leakage.

[0031] To facilitate the operator's rotation of the isolation valve core 2 and switching between its first and second positions, a rotating component 5 is also provided on the isolation valve core 2. This component extends from the mounting through hole and drives the isolation valve core 2 to rotate around its own axis, thereby switching between the first and second positions. In one embodiment of this application, the rotating component 5 includes a handwheel, which is connected to the valve core extension 23 on the isolation valve core 2. Specifically, the end of the valve core extension 23 away from the connecting valve body 1 has an external thread, and the end of the handwheel facing the valve core extension 23 has an internal thread to achieve a threaded connection. In other embodiments, a detachable connection between the valve core extension 23 and the handwheel can also be achieved by tightening a nut.

[0032] Furthermore, to facilitate the connection between the connecting valve body 1 and the casing system during actual use, extension sections 13 extend outward from both ends of the connecting valve body 1 in the axial direction of the inner pipe body 11 and the outer pipe body 12 for connecting to the casing system. The additional extension sections 13 further facilitate the flange connection or welding connection between the connecting valve body 1 and the pipeline in the casing system, and facilitate the overall installation.

[0033] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0034] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A sleeve-type pipeline sealing isolation valve, characterized in that, It includes: The connecting valve body (1) includes an inner tube (11) and an outer tube (12) arranged coaxially. An inner flow channel (111) is provided inside the inner tube (11), and an outer flow channel (121) is formed between the inner tube (11) and the outer tube (12). The connecting valve body (1) is provided with a mounting through hole extending radially thereon. The isolation valve core (2) is installed in the mounting through hole and is provided with an inner hole (21) for connecting the inner flow channel (111) and an outer hole (22) for connecting the outer flow channel (121). An elastic sealing assembly (3) is axially disposed at both ends of the outer hole (22) along the outer flow channel (121); In addition, a valve body seal (4) is installed on the connecting valve body (1) and abuts against the elastic sealing assembly (3).

2. The sleeve-type pipeline sealing isolation valve as described in claim 1, characterized in that, The isolation valve core (2) includes: An inner flow section (211) is provided with an inner hole (21) on the inner flow section (211), and the diameter of the inner flow section (211) is adapted to the diameter of the mounting through hole; In addition, an outflow portion (221) is coaxially arranged with the inflow portion (211), an outer hole (22) is provided on the outflow portion (221), and the diameter of the outflow portion (221) is smaller than that of the inflow portion (211), so that a placement space (222) is formed between the outflow portion (221) and the connecting valve body (1), and the elastic sealing assembly (3) is provided in the placement space (222).

3. A sleeve-type pipeline sealing isolation valve as described in claim 2, characterized in that, The resilient sealing assembly (3) includes: A compression collar (31) is fitted onto the outflow portion (221) and has a through hole corresponding to the outer hole (22). Both ends of the compression collar (31) are provided with abutment portions (311). The abutment portions (311) are spaced apart from the connecting valve body (1) and the outflow portion (221) to form a sealing cavity (312). The valve body seal (4) abuts against the abutment portions (311). In addition, there are two elastic compression members (32) provided at both ends of the axial direction of the compression ring (31). The elastic compression members (32) abut against the abutment part (311) and can deform and squeeze into the sealing cavity (312) under the compression of the valve body seal (4).

4. A sleeve-type pipeline sealing isolation valve as described in claim 3, characterized in that, The resilient sealing assembly (3) further includes: Force transmission pads (33) are disposed at both ends of the clamping collar (31) and abut against the elastic telescopic member.

5. A sleeve-type pipeline sealing isolation valve as described in claim 3, characterized in that: The elastic compression member (32) includes a graphite sealing ring, which is sleeved on the two abutment portions (311).

6. A sleeve-type pipeline sealing isolation valve as described in claim 2, characterized in that: The isolation valve core (2) further includes a valve core extension (23), which is connected to the outflow portion (221) and extends from the mounting through hole. The valve body seal (4) includes: A sealing plug (41) is fitted onto the valve core protrusion (23) and abuts against the elastic sealing assembly (3); In addition, a connecting plate (42) is disposed on the sealing plug (41) and is detachably connected to the connecting valve body (1).

7. A sleeve-type pipeline sealing isolation valve as described in claim 6, characterized in that, The valve body seal (4) also includes: A sealing gasket (43) is disposed between the sealing plug (41) and the valve core protrusion (23) and between the sealing plug (41) and the connecting valve body (1).

8. A sleeve-type pipeline sealing isolation valve as described in claim 1, characterized in that, It also includes: Rotating component (5) is connected to the isolation valve core (2) and is used to drive the isolation valve core (2) to rotate around its own axis.

9. A sleeve-type pipeline sealing isolation valve as described in claim 8, characterized in that, The rotating component (5) includes: Turn the handwheel (51), which is connected to the isolation valve core (2) and located outside the connecting valve body (1).

10. A sleeve-type pipeline sealing isolation valve as described in claim 1, characterized in that, It also includes: Extension section (13) is provided at both ends of the inner tube body (11) and the outer tube body (12) in the axial direction and is used to connect the sleeve system.

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