Temporary pipeline isolation device
By designing a temporary isolation device for pipelines, and utilizing a combination of fixed plate, moving plate, sealing ring and clamping assembly, the problem of lack of isolation valves or inadequate isolation in nuclear power plant pipelines was solved, achieving effective isolation of pipeline media and independent operation of equipment.
Patent Information
- Application Number
- CN202422850051.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-11-20
AI Technical Summary
The lack of effective isolation valves or the inadequate isolation of pipelines in nuclear power plants can lead to the flow of media into other systems, affecting equipment operation.
A temporary pipeline isolation device is designed, which includes a fixed plate, a movable plate, a sealing ring, a clamping assembly and a positioning assembly. Sealing is achieved through sliding connection and detachable clamping, and the sealing force can be adjusted to enhance the sealing performance.
It effectively isolates pipeline media, solves the problems of no isolation valve or inadequate isolation, and ensures independent operation of equipment.
Smart Images
Figure CN223460125U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of the isolation overhauling of nuclear power plant equipment, and particularly relates to a pipeline temporary isolation device. BACKGROUND
[0002] The pipelines in a nuclear power station are complex and are used to connect the medium circulation between various devices. In the usual design, in order to facilitate the overhauling of the devices, a relevant isolation valve is usually designed on the pipeline. When the device needs to be overhauled, the isolation valve is closed, so that the overhauling of the device can be realized. After the overhauling is completed, the isolation valve is opened again, and the device can be put into operation again.
[0003] However, there are many devices in the field that are not designed with isolation valves, or are designed with isolation valves, but the isolation valves are not strictly isolated. During the overhaul of the unit, most of the devices are in the state of shutdown and overhauling, but there are often cases where only part of the devices are put into operation. If the device to be put into operation is not designed with an isolation valve, or the valve is not strictly isolated, once the device is put into operation, the medium in the device will flow into other systems and devices, so that the device cannot be operated independently. For example, in the flushing of the low-pressure heater, chemical reagents are used, but the actual pipeline isolation valve has poor isolation effect and cannot achieve complete isolation, so the chemical reagents can easily flow out of the pipeline and affect other devices. In addition, when two heaters are flushed at the same time, the pipeline between the two heaters has no isolation valve, so isolation cannot be achieved. CONTENT OF THE UTILITY MODEL
[0004] The technical problem to be solved by the utility model is to provide a pipeline temporary isolation device.
[0005] The utility model adopts the technical scheme that the technical problem thereof is solved: a pipeline temporary isolation device, including fixed disc, movable disc, a plurality of sealing rings, compression assembly and with the fixed connection of the positioning assembly of pipeline, the fixed disc with movable disc sliding connection, and the common clamping of a plurality of sealing rings, the outer diameter of each sealing ring is greater than the maximum outer diameter of fixed disc and the maximum outer diameter of movable disc respectively, the compression assembly penetrates fixed disc and movable disc and can detachable sealed clamping fixed disc and movable disc, and the positioning assembly is fixedly connected with the compression assembly.
[0006] In some embodiments, the compression assembly includes a connecting rod, a first clamping member and a second clamping member, the first clamping member and the second clamping member are respectively detachably positioned with the connecting rod, and one of the first clamping member and the second clamping member is pressed against the outer wall surface of the fixed disc, and the other of the first clamping member and the second clamping member is pressed against the outer wall surface of the movable disc, and the connecting rod is further fixedly connected with the positioning assembly.
[0007] In some embodiments, the fixed disc comprises a bottom wall, a fixed side wall, and a fixed boss abutting against the sealing ring, the fixed side wall is fixedly connected with the bottom wall and the fixed boss respectively;
[0008] The moving disc comprises a top wall, a moving side wall, and a moving boss abutting against the sealing ring, the moving side wall is fixedly connected with the fixed side wall and the moving boss respectively;
[0009] The fixed side wall is slidingly connected with the moving side wall, and the fixed boss and the moving boss jointly hold a plurality of the sealing rings.
[0010] In some embodiments, the fixed boss is arranged close to the bottom wall, the moving boss is arranged away from the top wall, a plurality of the sealing rings are fixedly sleeved on the fixed side wall, and the moving side wall is slidingly sleeved on the fixed side wall;
[0011] Alternatively, the fixed boss is arranged away from the bottom wall, the moving boss is arranged close to the top wall, a plurality of the sealing rings are fixedly sleeved on the moving side wall, and the fixed side wall is slidingly sleeved on the moving side wall.
[0012] In some embodiments, the positioning assembly comprises a positioner and a fixing assembly connected with the pipe, the positioner is fixedly connected with the fixing assembly and the connecting rod respectively.
[0013] In some embodiments, the fixing assembly comprises at least two adjusting bolts arranged oppositely, each adjusting bolt is screwed with the positioner, and the screw rod of each adjusting bolt extends outside the positioner.
[0014] In some embodiments, the pressing assembly further comprises a third clamping member and a fourth clamping member, the third clamping member and the fourth clamping member jointly clamp the positioner and are respectively detachably connected with the connecting rod.
[0015] In some embodiments, the pressing assembly further comprises a sealing gasket, the sealing gasket is arranged between the moving disc and the first clamping member or the second clamping member.
[0016] In some embodiments, the connecting rod is a screw rod, the first clamping member and the second clamping member are nuts respectively, and the first clamping member and the second clamping member are screwed with the connecting rod respectively.
[0017] In some embodiments, the number of the sealing rings is at least two.
[0018] The pipe temporary isolation device further comprises a pressing ring, and adjacent sealing rings are separated by the pressing ring.
[0019] By implementing the utility model, the following beneficial effects are achieved:
[0020] The pipeline temporary isolation device of the utility model, including fixed disc, movable disc, a plurality of sealing rings, compression assembly and with the pipeline fixed connection's positioning assembly, the fixed disc with the movable disc sliding connection, and common clamping a plurality of the sealing ring, the outer diameter of each the sealing ring is respectively greater than the maximum outer diameter of the fixed disc and the maximum outer diameter of the movable disc;The compression assembly penetrates the fixed disc and the movable disc and can dismantle sealed clamping the fixed disc and the movable disc, the positioning assembly with the compression assembly fixed connection. Can put fixed disc, movable disc, a plurality of sealing rings, positioning assembly and partial or all compression assembly into the pipeline inside, through the positioning assembly with the pipeline fixed connection, a plurality of sealing rings with the inner wall of pipeline abuts and realizes sealing effect, through the compression assembly can dismantle sealed clamping fixed disc and movable disc, can adjust the compression force of sealing ring, thereby select the sealing force needed, enhance the sealing performance of sealing ring. The pipeline temporary isolation device simple structure, installation is very convenient. When installing on the pipeline, effectively realize the isolation to the medium in the pipeline, can well solve the problem that the pipeline needs to be isolated but does not have isolation valve or isolation valve isolation is not strict. BRIEF DESCRIPTION OF DRAWINGS
[0021] The utility model will be further described below combining with the drawings and examples, and the drawings are as follows:
[0022] Figure 1 It is the structure schematic diagram of the pipeline temporary isolation device of one embodiment of the utility model. CONCRETE IMPLEMENTING METHOD
[0023] In order to have more clear understanding to the technical features, object and effect of the utility model, now the specific implementing method of the utility model is explained in detail with the drawings.
[0024] It should be explained that, in the case of no conflict, the embodiment in the utility model and the features in the embodiment can be combined mutually.
[0025] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0026] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected, can be mechanical connection, or chemical connection, can be directly connected, or indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.
[0027] Referring to Figure 1 One embodiment of the utility model discloses a kind of pipeline temporary isolation devices, including fixed disc 1, movable disc 2, several sealing rings 3, compression assembly 4 and with the fixed connection of pipe 7 positioning assembly 5.Fixed disc 1 is slidably connected with movable disc 2, and several sealing rings 3 are clamped together, and the outer diameter of each sealing ring 3 is greater than the maximum outer diameter of fixed disc 1 and the maximum outer diameter of movable disc 2 respectively.Compression assembly 4 penetrates fixed disc 1 and movable disc 2 and can detachably seal and hold fixed disc 1 and movable disc 2, and positioning assembly 5 is fixedly connected with compression assembly 4.
[0028] The temporary isolation device for pipelines of the present invention places a fixed plate 1, a movable plate 2, a plurality of sealing rings 3, a positioning assembly 5 and part or all of the pressing assembly 4 into the interior of the pipeline 7. The plurality of sealing rings 3 abut against the inner wall of the pipeline 7 to achieve a sealing effect. The fixed plate 1 and the movable plate 2 are removably clamped by the pressing assembly 4, and the pressing force of the sealing ring 3 can be adjusted to select the required sealing force and enhance the sealing performance of the sealing ring 3. The positioning assembly 5 is fixedly connected to the pipeline 7, for example, the positioning assembly 5 is connected to the port or inner wall of the pipeline 7, thereby achieving the positioning and fixation of the entire pipeline temporary isolation device. The temporary isolation device for pipelines of the present invention has a simple structure and is extremely convenient to install. When installed on the pipeline 7, it effectively achieves the isolation of the medium in the pipeline 7, which can well solve the problem that the pipeline 7 needs to be isolated but there is no isolation valve or the isolation valve is not strictly isolated.
[0029] It can be understood that the temporary isolation device for pipelines of the present invention can be applied to any pipeline 7 that has an installation port and can be installed with the temporary isolation device for pipelines. For example, the pipeline 7 includes a low-pressure liner 71 and a low-pressure pipe wall 72, and the low-pressure liner 71 is arranged in a portion of the pipe section inside the low-pressure pipe wall 72. The temporary isolation device for pipelines can be processed into a size that matches the size of the pipeline 7 according to the actual size of the pipeline 7 on site. Among them, the cross-sectional shapes of the fixed plate 1, the movable plate 2 and the sealing ring 3 are respectively matched with the low-pressure pipe wall 72. For example, if the cross-sectional shape of the low-pressure pipe wall 72 is circular, then the cross-sectional shapes of the fixed plate 1, the movable plate 2 and the sealing ring 3 are respectively circular. See Figure 1 The pipe 7 port is located above, and the LP liner 71 is positioned near the pipe 7 port. During installation, the fixed plate 1, movable plate 2, and sealing ring 3 are installed away from the pipe 7 port and directly abut against the LP pipe wall 72. The fixed plate 1 is generally located below the movable plate 2, i.e., the fixed plate 1 is farther from the pipe 7 port than the movable plate 2, so that the position of the movable plate 2 can be adjusted after entering the pipe 7. The positioning assembly 5 is closer to the pipe 7 port than the movable plate 2 and directly abuts against the LP liner 71. After the relative positions of the fixed plate 1 and movable plate 2 are determined, i.e., after the compression force of the sealing ring 3 is determined, the positioning assembly 5 can be installed to achieve positioning and fixation of the entire pipeline temporary isolation device.
[0030] In some embodiments, the pressing assembly 4 comprises a connecting rod 41, a first clamping piece 42 and a second clamping piece 43, the first clamping piece 42 and the second clamping piece 43 are respectively detachably positioned and connected with the connecting rod 41, and one of the first clamping piece 42 and the second clamping piece 43 is pressed against the outer wall surface of the fixed disc 1, and the other of the first clamping piece 42 and the second clamping piece 43 is pressed against the outer wall surface of the movable disc 2. The connecting rod 41 is further fixedly connected with the positioning assembly 5, and the positioning assembly 5 is fixed on the pipeline 7 to realize the positioning of the connecting rod 41 and the final positioning of the fixed disc 1, the movable disc 2 and the plurality of sealing rings 3. The detachable positioning and connection can include clamping or screwing, etc. For example, the connecting rod 41 is a screw rod, the first clamping piece 42 and the second clamping piece 43 are respectively nuts, and the first clamping piece 42 and the second clamping piece 43 are respectively screwed with the connecting rod 41. The first clamping piece 42 is pressed against the outer wall surface of the fixed disc 1, and the second clamping piece 43 is pressed against the outer wall surface of the movable disc 2, the first clamping piece 42 and the second clamping piece 43 clamp the fixed disc 1 and the movable disc 2 therebetween, and the fixed disc 1 and the movable disc 2 clamp the plurality of sealing rings 3 therebetween, and the relative distance between the fixed disc 1 and the movable disc 2 can be adjusted by adjusting the relative distance between the first clamping piece 42 and the second clamping piece 43, so as to adjust the pressing force of the plurality of sealing rings 3. It can be understood that in other embodiments, the first clamping piece 42 and the second clamping piece 43 can also be respectively clamped and fixed with the connecting rod 41, for example, the connecting rod 41 is provided with a plurality of clamping grooves, and the first clamping piece 42 and the second clamping piece 43 are respectively provided with clamping protrusions, and this connection method is not the focus of the present application, and will not be described here.
[0031] In some embodiments, the fixed disc 1 comprises a bottom wall 11, a fixed side wall 12 and a fixed boss 13 abutting against the sealing ring 3, and the fixed side wall 12 is fixedly connected with the bottom wall 11 and the fixed boss 13 respectively. The movable disc 2 comprises a top wall 21, a movable side wall 22 and a movable boss 23 abutting against the sealing ring 3, and the movable side wall 22 is fixedly connected with the fixed side wall 12 and the movable boss 23 respectively. The fixed side wall 12 is slidably connected with the movable side wall 22, and the fixed boss 13 and the movable boss 23 jointly clamp the plurality of sealing rings 3. It can be understood that the shapes of the bottom wall 11 and the top wall 21 can be the same as or similar to the cross section of the pipeline 7. The sealing ring 3 is sleeved on the fixed side wall 12 or the movable side wall 22, and the shapes of the fixed side wall 12 and the movable side wall 22 are similar to or the same as the inner wall shape of the sealing ring 3, so as to provide sufficient support force in the radial direction of the sealing ring 3. The shapes of the fixed boss 13 and the movable boss 23 are similar to or the same as the end face shape of the sealing ring 3, so as to provide sufficient support force and pressing force in the axial direction of the sealing ring 3. For example, the cross section of the pipeline 7 is circular, the sealing ring 3 is a circular ring, the bottom wall 11 and the top wall 21 are circular respectively, the fixed side wall 12 and the movable side wall 22 are cylindrical respectively, and the fixed boss 13 and the movable boss 23 are circular rings respectively.
[0032] In some embodiments, the fixed boss 13 is disposed near the bottom wall 11, the movable boss 23 is disposed away from the top wall 21, a plurality of sealing rings 3 are fixedly sleeved on the fixed side wall 12, and the movable side wall 22 is slidably sleeved on the fixed side wall 12. The maximum outer diameter of the fixed side wall 12 is slightly less than or equal to the minimum inner diameter of the movable side wall 22. Alternatively, in other embodiments, the fixed boss 13 is disposed away from the bottom wall 11, the movable boss 23 is disposed near the top wall 21, a plurality of sealing rings 3 are fixedly sleeved on the movable side wall 22, and the fixed side wall 12 is slidably sleeved on the movable side wall 22. The maximum outer diameter of the movable side wall 22 is slightly less than or equal to the minimum inner diameter of the fixed side wall 12. It will be appreciated that to facilitate the sliding connection between the movable side wall 22 and the fixed side wall 12 and to limit relative rotation between the movable side wall 22 and the fixed side wall 12, the movable side wall 22 and the fixed side wall 12 may be provided with mutually cooperating slideways and rails along the axial direction. For example, the movable side wall 22 is provided with at least one slideway, and the fixed side wall 12 is provided with at least one slide rail.
[0033] It is understood that the number of sealing rings 3 can be one, two, three, four, etc., and can be set according to actual needs. In some embodiments, the number of sealing rings 3 is at least two, and the temporary pipeline isolation device further includes a pressure ring 6, which separates adjacent sealing rings 3. The pressure ring 6 is slidably connected to the fixed side wall 12 or the movable side wall 22. The pressure ring 6 can ensure that the adjacent sealing rings 3 are evenly stressed.
[0034] In some embodiments, the positioning assembly 5 includes a positioner 51 and a fixing assembly connected to and positioned within the pipeline 7. The positioner 51 is fixedly connected to the fixing assembly and the connecting rod 41, respectively. The positioner 51 can be used to monitor the position of the entire pipeline temporary isolation device and promptly detect abnormalities such as slippage and displacement. The fixing assembly secures the positioner 51 within the pipeline 7 and ultimately secures the entire pipeline temporary isolation device, preventing displacement within the pipeline 7. The fixing assembly can be fixed to the end of the pipeline 7, the outer wall of the pipeline 7, or the inner wall of the pipeline 7.
[0035] In some embodiments, the fixing assembly includes at least two oppositely disposed adjusting bolts 52, each of which is threadedly connected to the positioner 51, and the screw of each adjusting bolt 52 extends outside the positioner 51. The screw end of the adjusting bolt 52 can abut against the inner wall of the pipe 7, thereby achieving fixation.
[0036] In some embodiments, the compression assembly 4 further comprises a third clamping member 44 and a fourth clamping member 45, which together clamp the positioner 51 and are respectively detachably positioned and connected with the connecting rod 41. The detachable positioning and connection can include clamping or screwing, etc. For example, the connecting member is a screw rod, and the third clamping member 44 and the fourth clamping member 45 are respectively nuts, which are screwed and fixed with the connecting rod 41. By adjusting the positions of the third clamping member 44 and the fourth clamping member 45 on the connecting rod 41, the position of the positioner 51 on the connecting rod 41 is adjusted, i.e. the distance between the positioner 51 and the fixed disc 1 and the movable disc 2 is adjusted, and the installation length of the pipeline 7 required by the pipeline temporary isolation device is adjusted, so that the pipeline temporary isolation device is adaptively installed according to the characteristics of the pipeline 7, and isolation is achieved. It can be understood that in other embodiments, the third clamping member 44 and the fourth clamping member 45 can also be respectively clamped and fixed with the connecting rod 41, for example, the connecting rod 41 is provided with a plurality of clamping grooves, and the third clamping member 44 and the fourth clamping member 45 are respectively provided with clamping protrusions. This connection method is not the focus of the present application, and will not be described here.
[0037] In some embodiments, the compression assembly 4 further comprises a sealing gasket, which is arranged between the movable disc 2 and the first clamping member 42 or the second clamping member 43. For example, the sealing gasket is arranged between the movable disc 2 and the first clamping member 42, and can be sleeved on the connecting rod 41 and abut with the movable disc 2 and the first clamping member 42 respectively, so as to form a seal among the movable disc 2, the connecting rod 41 and the first clamping member 42 to prevent leakage. The sealing gasket arranged between the movable disc 2 and the second clamping member 43 is the same. The sealing gasket can also be arranged between the fixed disc 1 and the second clamping member 43 or the first clamping member 42 to achieve sealing among the fixed disc 1, the connecting rod 41 and the second clamping member 43 or among the fixed disc 1, the connecting rod 41 and the first clamping member 42. It can be understood that in other embodiments, the fixed disc 1 can be fixed with the connecting rod 41 and the second clamping member 43 or the first clamping member 42 by welding, and sealing is achieved at the same time.
[0038] By implementing the present application, the following beneficial effects are achieved:
[0039] The temporary isolation device for pipelines of the present invention can place a fixed plate 1, a movable plate 2, a plurality of sealing rings 3, a positioning assembly 5 and part or all of the pressing assembly 4 into the interior of the pipeline 7, which is fixedly connected to the pipeline 7 through the positioning assembly 5. The plurality of sealing rings 3 abut against the inner wall of the pipeline 7 to achieve a sealing effect. The fixed plate 1 and the movable plate 2 can be removably clamped by the pressing assembly 4, and the pressing force of the sealing ring 3 can be adjusted to select the required sealing force and enhance the sealing performance of the sealing ring 3. For example, the positioning assembly 5 is connected to the port or inner wall of the pipeline 7 to achieve the positioning and fixation of the overall temporary isolation device for pipelines. The temporary isolation device for pipelines has a simple structure and is extremely convenient to install. When installed on the pipeline 7, it effectively achieves the isolation of the medium in the pipeline 7, which can well solve the problem that the pipeline 7 needs to be isolated but there is no isolation valve or the isolation valve is not strictly isolated.
[0040] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, which all fall within the scope of protection of the present invention, that is, the embodiments described in "some embodiments" can be freely combined with any of the above and below embodiments. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.
Claims
1. A temporary pipe isolation device, characterized in that, The utility model provides a sealing device for pipeline, including fixed disc (1), moving disc (2), a plurality of sealing ring (3), compression assembly (4) and with pipeline (7) fixed connection's positioning assembly (5), fixed disc (1) with moving disc (2) sliding connection is held together a plurality of sealing ring (3), every sealing ring (3) outer diameter is greater than the maximum outer diameter of fixed disc (1) and the maximum outer diameter of moving disc (2) respectively, compression assembly (4) penetrates fixed disc (1) and moving disc (2) and can detachable sealed holding fixed disc (1) and moving disc (2), positioning assembly (5) with compression assembly (4) fixed connection.
2. The temporary pipe isolation device of claim 1, wherein, Compression assembly (4) includes connecting rod (41), first clamping piece (42) and second clamping piece (43), first clamping piece (42) and second clamping piece (43) are detachable positioning connection with connecting rod (41) respectively, and one of first clamping piece (42) and second clamping piece (43) is pressed against the outer wall surface of fixed disc (1), and the other of first clamping piece (42) and second clamping piece (43) is pressed against the outer wall surface of moving disc (2), connecting rod (41) is further fixedly connected with positioning assembly (5).
3. The temporary pipe isolation device of claim 1, wherein, Fixed disc (1) includes bottom wall (11), fixed side wall (12) and fixed boss (13) abutting with sealing ring (3), fixed side wall (12) is fixedly connected with bottom wall (11) and fixed boss (13) respectively, Moving disc (2) includes top wall (21), moving side wall (22) and moving boss (23) abutting with sealing ring (3), moving side wall (22) is fixedly connected with fixed side wall (12) and moving boss (23) respectively, Fixed side wall (12) is slidingly connected with moving side wall (22), and fixed boss (13) and moving boss (23) hold together a plurality of sealing ring (3).
4. The temporary pipe isolation device of claim 3, wherein, Fixed boss (13) is arranged close to bottom wall (11), moving boss (23) is arranged away from top wall (21), a plurality of sealing ring (3) is fixedly sleeved on fixed side wall (12), and moving side wall (22) is slidingly sleeved on fixed side wall (12), Or, fixed boss (13) is arranged away from bottom wall (11), moving boss (23) is arranged close to top wall (21), a plurality of sealing ring (3) is fixedly sleeved on moving side wall (22), and fixed side wall (12) is slidingly sleeved on moving side wall (22).
5. The temporary pipe isolation device of claim 2, wherein, Positioning assembly (5) includes positioner (51) and fixed assembly connected and positioned with pipeline (7), positioner (51) is fixedly connected with fixed assembly and connecting rod (41) respectively.
6. The temporary pipe isolation device of claim 5, wherein, The fixed assembly includes at least two oppositely arranged adjusting bolts (52), each adjusting bolt (52) is screwed with the positioner (51), and the screw rod of each adjusting bolt (52) extends outside the positioner (51).
7. The temporary pipe isolation device of claim 5, wherein, The pressing assembly (4) further comprises a third clamping member (44) and a fourth clamping member (45), which together clamp the positioner (51) and are respectively detachably positioned and connected with the connecting rod (41).
8. The temporary pipe isolation device of claim 2, wherein, The pressing assembly (4) further comprises a sealing gasket arranged between the dynamic disc (2) and the first clamping member (42) or the second clamping member (43).
9. The temporary pipe isolation device of any one of claims 2, 5-8, wherein, The connecting rod (41) is a screw rod, and the first clamping member (42) and the second clamping member (43) are respectively screw nuts, which are respectively screwed with the connecting rod (41).
10. A temporary pipe isolation device according to any one of claims 1 to 8, wherein, The number of the sealing rings (3) is at least two. The pipeline temporary isolation device further comprises a pressing ring (6), and adjacent sealing rings (3) are separated by the pressing ring (6).