Pipeline interception device and auxiliary construction equipment thereof

Abstract

This invention discloses a pipeline shut-off device and its auxiliary construction equipment, relating to the field of pipeline shut-off technology. It includes a steel ring and a sealing ring installed on the inner circumference of the steel ring. The outer circumference of the steel ring is used to contact the inner wall of the pipeline. Multiple sealing strips are arranged in a circular array on the inner circumference of the sealing ring, with baffles between adjacent sealing strips. Multiple baffles and sealing strips are spliced ​​together to form an insertion hole coaxial with the steel ring. It also includes a clamping rod. The steel ring and sealing ring combine to form a rigid structure. After the clamping rod is inserted, it expands the multiple baffles and sealing strips, achieving a tight fit between the sealing strips and the steel ring through mechanical expansion. The steel ring also deforms slightly to press against the inner wall of the pipeline. This replaces the traditional airbag-based sealing method that relies on air pressure, fundamentally avoiding the sealing failure problem caused by pressure fluctuations, punctures by sharp objects on the pipe wall, or air leakage. Furthermore, it eliminates the need for auxiliary equipment such as air compressors, making operation simpler.

Description

Technical Field

[0001] This invention relates to the field of pipeline interception technology, and in particular to a pipeline interception device and its auxiliary construction equipment. Background Technology

[0002] In the maintenance and repair of municipal drainage networks, industrial pipelines and other facilities, pipeline shut-off devices are key tools used to temporarily seal the ends or damaged parts of pipelines, creating a safe and waterless working environment for subsequent construction.

[0003] Currently, the most typical temporary sealing method among various pipeline shut-off devices is airbag sealing (such as...). Figure 11 As shown in the figure, its working principle is to use a rubber airbag to inflate it. When the gas pressure inside the airbag reaches the specified requirements, the airbag fills the entire pipe section. The friction between the airbag wall and the pipe wall is used to block the water flow, thereby achieving a leak-free sealing effect in the target pipe section.

[0004] However, airbag sealing has revealed several inherent drawbacks in practical applications. First, airbags rely on friction between the rubber material and the pipe wall for sealing, making them extremely sensitive to inflation pressure: excessive pressure can tear the rubber layer or break the fiber skeleton, even causing the airbag to explode; insufficient pressure prevents the airbag from adhering tightly to the pipe wall, leading to leakage or displacement and sealing failure. Second, the inner walls of sewage pipes are often covered with mud, oil, burrs, glass shards, and other sharp objects, which can easily puncture the surface of the airbag, causing leakage and a rapid decline in sealing effectiveness. When airbag leakage is not detected and repressurized in time, the airbag will gradually shrink and eventually be washed away by the water flow, making recovery difficult and causing losses from secondary construction. Third, airbag sealing requires auxiliary equipment such as air compressors, air hoses, and pressure gauges, making inflation and deflation relatively cumbersome. Continuous monitoring of air pressure is also necessary after installation, resulting in a long operation cycle. Summary of the Invention

[0005] The purpose of this invention is to provide a pipeline shut-off device and its auxiliary construction equipment to solve the technical problems of the existing technology of using airbags to seal pipelines, which is prone to excessive air pressure leading to airbag explosion, and the airbags are easily punctured when there are sharp objects such as burrs and glass fragments in the pipeline. In addition, the use of airbags requires a series of equipment, which is inconvenient.

[0006] The technical problem to be solved by this invention can be achieved through the following technical solution: A pipe shut-off device includes a steel ring and a sealing ring installed on the inner circumference of the steel ring. The outer circumference of the steel ring is used to contact the inner circumferential wall of the pipe. Multiple sealing strips are distributed in a circular array on the inner circumference of the sealing ring. Baffles are provided between adjacent sealing strips. Multiple baffles and sealing strips are spliced ​​to form an insertion hole coaxial with the steel ring. The device also includes a clamping rod. When the clamping rod is inserted into the insertion hole, it provides a counterforce to the multiple baffles in a direction away from the steel ring. A positioning element is installed on the clamping rod. After the clamping rod is inserted into the insertion hole, the positioning element can be used to release or fix the clamping rod to the baffle.

[0007] Preferably, the baffle is fan-shaped and the end near the axis of the steel ring is flat, the cross-section of the clamping rod is a regular polygon, and the sealing ring has a plurality of arc-shaped slots arranged in a circular array on one end face. The baffle has a snap-fit ​​arc plate constructed on its arc surface, and the snap-fit ​​arc plate is installed in the arc-shaped slot by bolts.

[0008] Preferably, the positioning element includes a plurality of plug-in plates that are slidably mounted in a circular array on the outer periphery of the abutting plug rod. The end of the baffle near the axis of the steel ring has a positioning groove for the plug-in plates to be inserted. One end of the abutting plug rod is provided with a torsion member, which drives the plurality of plug-in plates to move synchronously.

[0009] Preferably, a spring sheet is installed between the plug plate and the clamping rod, the torsion member includes a movable plate slidably installed in the clamping rod, a plurality of touch plates are installed in a circular array on the movable plate, a forcing slope is constructed on one side of the plug plate located in the clamping rod, the plurality of touch plates respectively contact the plurality of forcing slopes, and a drive screw threaded through the movable plate is rotatably installed at one end of the clamping rod.

[0010] Preferably, one end face of the baffle is a mounting surface and the other end face is a pressing surface. The sealing strip is installed on the mounting surface of the baffle by bolts and abuts against the pressing surface of the adjacent baffle.

[0011] Preferably, one end of the plug-in plate is provided with a guide slope, the number of plug-in plates is six, and one end of the abutting plug rod is provided with a limiting plate. When the limiting plate is attached to multiple baffles, the multiple plug-in plates are respectively inserted into multiple positioning slots.

[0012] A pipeline auxiliary construction device, using the aforementioned pipeline shut-off device, wherein one end face of a plurality of baffles is provided with positioning holes, the plurality of positioning holes are distributed in a circular array around the axis of a steel ring, the pipeline auxiliary construction device further includes a support base, a plurality of drive plates are slidably mounted in a circular array on the support base, the drive plates are provided with insert shafts for insertion into the positioning holes, and the support base is provided with a spreading mechanism for driving the plurality of drive plates to move closer or further away from each other synchronously.

[0013] Preferably, the spreading mechanism includes an expanding cylinder that is inserted into the bearing seat, the expanding cylinder being used for the passage of the clamping insert rod, a rotating plate being rotatably mounted on the outer periphery of the expanding cylinder, a plurality of inclined slots being formed in a circular array on the rotating plate, and a column rod being constructed on the drive plate, the plurality of column rods being slidably tangentially within the plurality of inclined slots respectively.

[0014] Preferably, a pivot rod is rotatably mounted on the outer periphery of the expansion cylinder, one end of the pivot rod is constructed with a regular hexagonal block, and the pivot rod is coupled to one of the columns, so that the corresponding column moves together when the pivot rod rotates.

[0015] Preferably, the pivot rod has threads on its outer periphery, and one end of one of the rods has a threaded block that is threadedly fitted onto the pivot rod.

[0016] The beneficial effects of this invention are: This invention uses a steel ring and a sealing ring to form a rigid structure. After the insertion of the clamping rod, multiple baffles and sealing strips are opened, achieving a tight fit between the sealing strip and the steel ring through mechanical opening. The steel ring also deforms slightly and presses against the inner wall of the pipe, replacing the traditional airbag-based sealing method that relies on air pressure. This fundamentally avoids the sealing failure problem caused by airbag pressure fluctuations, punctures by sharp objects on the pipe wall, or air leakage. Moreover, it does not require auxiliary equipment such as an air compressor, making the operation simpler.

[0017] This invention drives multiple insertion shafts to expand outward synchronously through a spreading mechanism, pre-expanding the holes of each baffle to temporarily enlarge the diameter of the insertion hole to be larger than the diameter of the clamping rod, thereby solving the problem of difficulty in inserting the clamping rod due to the insertion hole being too small, and significantly reducing the difficulty of installation.

[0018] This invention uses a pivot rod and a threaded block at the end of the corresponding column rod to form a threaded transmission, which converts the rotational force applied by the wrench to the regular hexagonal block into a thrust that drives the column rod to slide along the inclined groove. By utilizing the force amplification characteristic of the thread, the rotating plate is driven to rotate, thereby effectively reducing the operating force required to open the baffle in large-diameter working conditions and solving the problem that the increased size of the components leads to difficult rotation or even no rotation at all. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the pipeline interception device of the present invention.

[0020] Figure 2 This is the present invention. Figure 1 A diagram from another direction.

[0021] Figure 3 This is a diagram illustrating the clamping rod structure of the present invention.

[0022] Figure 4 This is the present invention. Figure 3 Partial three-dimensional sectional view.

[0023] Figure 5 This is the present invention. Figure 3 Exploded view of part of the structure.

[0024] Figure 6 This is the present invention. Figure 1 Partial structural diagram.

[0025] Figure 7 This is a diagram showing the state of the pipeline flow control device of the present invention during use.

[0026] Figure 8 This is a structural diagram of the pipeline auxiliary construction equipment of the present invention.

[0027] Figure 9 This is the present invention. Figure 8 Another state diagram.

[0028] Figure 10 This is a diagram showing the status of the pipeline interception device of the present invention when using pipeline auxiliary construction equipment.

[0029] Figure 11 This is an existing technical means of pipe closure.

[0030] Explanation of reference numerals in the attached figures: 1. Steel ring; 2. Sealing ring; 3. Sealing strip; 4. Baffle; 5. Insertion hole; 6. Clamping rod; 7. Positioning component; 701. Insertion plate; 702. Torsion component; 7021. Moving plate; 7022. Touch plate; 7023. Drive screw; 7024. Spring; 7025. Guide slope; 7026. Forcing slope; 703. Positioning groove; 8. Arc-shaped slot; 9. Snap-fit ​​arc plate; 10. Bearing seat; 11. Drive plate; 12. Insertion shaft; 13. Spreading mechanism; 14. Expanding cylinder; 15. Rotating plate; 16. Inclined groove; 17. Column rod; 18. Pivot rod; 19. Limiting plate; 20. Positioning hole; 21. Threaded block; 22. Regular hexagonal block. Detailed Implementation

[0031] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0032] Example 1 In practical applications, airbag sealing has revealed several inherent drawbacks. First, airbags rely on friction between the rubber material and the pipe wall for sealing, making them extremely sensitive to inflation pressure: excessive pressure can tear the rubber layer or break the fiber skeleton, even causing the airbag to explode; insufficient pressure prevents the airbag from adhering tightly to the pipe wall, leading to leakage or displacement and sealing failure. Second, the inner walls of sewage pipes often have silt, oil, burrs, glass shards, and other sharp objects that can easily puncture the airbag surface, causing leakage and a rapid decline in sealing effectiveness. When airbag leakage is not detected and repressurized in time, the airbag will gradually shrink and eventually be washed away by the water flow, making recovery difficult and causing losses from secondary construction. Third, airbag sealing requires auxiliary equipment such as air compressors, air hoses, and pressure gauges, making inflation and deflation relatively cumbersome. Continuous monitoring of air pressure is also necessary after installation, resulting in a long operation cycle.

[0033] like Figures 1 to 7 As shown, a pipe shut-off device includes a steel ring 1 and a sealing ring 2 installed on the inner circumference of the steel ring 1. The outer circumference of the steel ring 1 is used to contact the inner circumference of the pipe. Multiple sealing strips 3 are distributed in a circular array on the inner circumference of the sealing ring 2. Baffles 4 are provided between adjacent sealing strips 3. Multiple baffles 4 and sealing strips 3 are spliced ​​to form an insertion hole 5 coaxial with the steel ring 1. It also includes a clamping rod 6. When the clamping rod 6 is inserted into the insertion hole 5, the clamping rod 6 provides a counterforce to the multiple baffles 4 in a direction away from the steel ring 1. A positioning element 7 is installed on the clamping rod 6. After the clamping rod 6 is inserted into the insertion hole 5, the positioning element 7 can be used to release or fix the clamping rod 6 to the baffle 4.

[0034] The working principle of this pipe shut-off device is as follows: During use, the steel ring 1, along with the sealing ring 2, is placed into the pipe at the location where shut-off is required. The outer circumference of the steel ring 1 adheres to the inner wall of the pipe, forming an initial barrier. Then, the clamping rod 6 is inserted into the insertion hole 5 formed by multiple baffles 4 and sealing strips 3. As the clamping rod 6 gradually penetrates deeper, its outer circumference applies a radial force away from the axis of the steel ring 1 to the multiple baffles 4, forcing each baffle 4 to expand the steel ring 1 outwards, thus tightly pressing the steel ring 1 against the inner wall of the pipe. After the clamping rod 6 is in place, it is fixed to the baffle 4 by the positioning element 7 to prevent it from retracting or loosening, thereby maintaining a persistent sealing state (e.g., ...). Figure 7 (As shown in the status).

[0035] It should be emphasized that the core improvement of this embodiment is that a rigid structure is formed by combining a steel ring 1 and a sealing ring 2. After the insertion of the clamping rod 6, multiple baffles 4 and sealing strips 3 are opened, and the sealing strips 3 and steel ring 1 are tightly fitted by mechanically opening them. The steel ring 1 will also deform slightly and press against the inner wall of the pipe, which replaces the traditional airbag sealing method that relies on air pressure. This fundamentally avoids the sealing failure problem caused by airbag pressure fluctuations, puncture by sharp objects on the pipe wall, or air leakage. Moreover, it does not require auxiliary equipment such as an air compressor, making the operation simpler.

[0036] Preferably, if a further improvement in sealing effect is required, an additional rubber ring can be fitted around the outer periphery of the steel ring 1 to further enhance the sealing effect. When sealing municipal sewage pipes, a double sealing can be achieved by using an airbag plus this interception device, depending on the actual situation.

[0037] In this embodiment, combined with Figures 1 to 3 and Figure 6 As shown, the baffle 4 is fan-shaped with one end near the axis of the steel ring 1 being flat. The cross-section of the clamping rod 6 is a regular polygon. Preferably, there are six baffles 4, meaning that the outer circumferential surface of the regular polygon of the clamping rod 6 can form a surface contact with the inner plane of each baffle 4, evenly distributing the radial spreading force to each baffle 4. One end of the clamping rod 6 is constructed with a limiting plate 19. When the limiting plate 19 is attached to multiple baffles 4, multiple insertion plates 701 are respectively inserted into multiple positioning slots 703. That is, when the clamping rod 6 is inserted, after the limiting plate 19 is attached to multiple baffles 4... This indicates that the clamping rod 6 has been inserted to a sufficient depth, serving as a reminder. The sealing ring 2 has multiple arc-shaped slots 8 arranged in a circular array on one end face. The baffle 4 has a snap-fit ​​arc plate 9 constructed on its arc surface. The snap-fit ​​arc plate 9 is installed in the arc-shaped slot 8 by bolts. In other words, there are also six baffles 4, which is sufficient to seal the pipeline and makes the installation of the baffles 4 more convenient. The constraint of the snap-fit ​​arc plate 9 in the arc-shaped slot 8 ensures the circumferential stability of the baffle 4 during the opening process, so that the sealing strip 3 can be pressed evenly and tightly against the pipe wall, improving the reliability of the interception seal.

[0038] In this embodiment, combined with Figures 1 to 5As shown, the positioning component 7 includes multiple insertion plates 701 that are slidably mounted in a circular array on the outer periphery of the clamping rod 6. The end of the baffle 4 near the axis of the steel ring 1 has a positioning groove 703 for inserting the insertion plates 701. One end of the clamping rod 6 is provided with a torsion member 702. The torsion member 702 drives the multiple insertion plates 701 to move synchronously. That is, after the clamping rod 6 is inserted into the insertion hole 5 and the limiting plate 19 is in contact with the baffle 4, the torsion member 702 drives the multiple insertion plates 701 to extend outward synchronously along the radial direction of the clamping rod 6, so that the insertion plates 701 are accurately inserted into the positioning grooves 703 of the corresponding baffle 4, so that the multiple insertion plates 701 are inserted into the multiple positioning grooves 703 respectively, thus completing the limiting of the clamping rod 6.

[0039] In this embodiment, combined with Figures 1 to 5 As shown, a spring sheet 7024 is installed between the insertion plate 701 and the clamping rod 6. The torsion member 702 includes a movable plate 7021 slidably installed inside the clamping rod 6. A plurality of touch plates 7022 are installed in a circular array on the movable plate 7021. The side of the insertion plate 701 inside the clamping rod 6 is constructed with a forcing slope 7026. The plurality of touch plates 7022 respectively contact the plurality of forcing slopes 7026. A drive screw 7023 threaded through the movable plate 7021 is rotatably installed at one end of the clamping rod 6. Preferably, one end of the insertion plate 701 is constructed with a guide slope 7025. The number of insertion plates 701 is six. That is, when the clamping rod 6 is inserted into the insertion hole 5, the guide slope 7025 will contact the baffle 4. The plane contacts the edge, thus forcing the plug plate 701 to retract into the contact rod. When the plug plate 701 is aligned with the corresponding positioning groove 703, the spring piece 7024 forces the plug plate 701 into the positioning groove 703. When inserting and clamping the contact rod 6, the plug plate 701 is automatically controlled without control, making it more convenient to use. When the plug plate 701 needs to be removed from the corresponding positioning groove 703, it is only necessary to rotate the drive screw 7023 to drive the moving plate 7021 to move. When the moving plate 7021 moves, it will drive the touch plate 7022 to contact the forcing inclined surface 7026. Under the action of the forcing inclined surface 7026, the six plug plates 701 move closer to each other at the same time, thus synchronously removing themselves from the positioning groove 703, making disassembly more convenient.

[0040] In this embodiment, combined with Figure 6 As shown, one end face of the baffle 4 is the mounting surface, and the other end face is the extrusion surface. The sealing strip 3 is installed on the mounting surface of the baffle 4 by bolts, and the sealing strip 3 abuts against the extrusion surface of the adjacent baffle 4.

[0041] It should be noted that both the sealing strip 3 and the sealing ring 2 have a different number of countersunk holes. The countersunk holes are used to place bolts so that the bolt heads can be completely located inside the countersunk holes, ensuring the contact area between the sealing strip 3 and the pressing surface of the adjacent baffle 4, and ensuring the sealing effect during subsequent disassembly and installation.

[0042] Preferably, this application does not impose any restrictions on the application occasion or overall size of the device. The interception device can be manufactured according to actual usage needs. In municipal engineering, when sewage pipes need to be blocked, airbags are conventionally used for blocking. However, airbags are inconvenient to use due to problems such as easy leakage and tearing. The interception device of this application has a simple overall structure and the components are detachable from each other, so the installation of the interception device can be completed directly on site. Even when facing the blocking of large pipes, the interception device can be disassembled into parts for easy transportation.

[0043] Example 2 When using the above-mentioned pipe shut-off device for shut-off operations, the clamping rod 6 needs to be inserted into the socket 5 formed by splicing multiple baffles 4 and sealing strips 3. The clamping rod 6 enables the multiple baffles 4 to provide an outward expansion force to the steel ring 1, so that the steel ring 1 abuts against the inner wall of the pipe. Therefore, after the baffles 4 are installed, the diameter of the socket 5 is smaller than the diameter of the clamping rod 6, making it difficult for the operator to smoothly insert the clamping rod 6 into the socket 5. Inserting the clamping rod 6 is quite troublesome.

[0044] Combination Figures 1 to 10 As shown, a pipeline auxiliary construction device uses the above-mentioned pipeline shut-off device. One end face of multiple baffles 4 is provided with positioning holes 20. The multiple positioning holes 20 are distributed in a circular array around the axis of the steel ring 1. The pipeline auxiliary construction device also includes a support seat 10. Multiple drive plates 11 are slidably mounted in a circular array on the support seat 10. The drive plates 11 are constructed with insertion shafts 12 for insertion into the positioning holes 20. The support seat 10 is equipped with a spreading mechanism 13 for driving the multiple drive plates 11 to move closer or further away from each other synchronously.

[0045] Working principle of the spreading mechanism 13: When installing the pipe shut-off device of this application, first place the bearing seat 10 on one side of the end face of the steel ring 1, so that the insertion shaft 12 on each drive plate 11 is inserted into the positioning hole 20 on the end face of the corresponding baffle 4. Then, the spreading mechanism 13 drives multiple drive plates 11 to spread outward synchronously. The insertion shaft 12 drives each baffle 4 to expand outward radially synchronously, so that the insertion hole 5 is pre-enlarged to be slightly larger than the diameter of the clamping rod 6. At this time, the clamping rod 6 can be easily inserted into the insertion hole 5. After the clamping rod 6 is inserted into place, the spreading mechanism 13 reverses the operation to make the insertion shaft 12 disengage from the positioning hole 20 and retract, so that the bearing seat 10 can be removed, thus completing the insertion of the clamping rod 6.

[0046] It should be emphasized that the core improvement of this embodiment is that: by driving multiple insertion shafts 12 to expand outward synchronously through the spreading mechanism 13, the holes of each baffle 4 are pre-expanded, so that the diameter of the insertion hole 5 is temporarily expanded to be larger than the diameter of the clamping insertion rod 6, thereby solving the problem that the clamping insertion rod 6 is difficult to insert due to the insertion hole 5 being too small, and significantly reducing the difficulty of installation operation.

[0047] In this embodiment, combined with Figures 8 to 10 As shown, the spreading mechanism 13 includes an expanding cylinder 14 inserted into the bearing seat 10. The expanding cylinder 14 is used for the insertion rod 6 to pass through. A rotating plate 15 is rotatably mounted on the outer periphery of the expanding cylinder 14. Multiple inclined slots 16 are formed in a circular array on the rotating plate 15. A column rod 17 is formed on the drive plate 11. The multiple column rods 17 slide tangentially in the multiple inclined slots 16 respectively. When the rotating plate 15 is rotated, the multiple inclined slots 16 on the rotating plate 15 rotate synchronously. The slot walls of the inclined slots 16 push the column rods 17 on each drive plate 11 to slide along the trajectory of the inclined slots 16. Since the multiple inclined slots 16 are distributed in a circular array on the rotating plate 15, each column rod 17 drives the drive plate under the guidance of the inclined slots 16. The expansion cylinder 14 extends radially outward or retracts inward along the bearing seat 10, and passes through the bearing seat 10 to provide a passage for the clamping rod 6. This allows the clamping rod 6 to be directly inserted into the insertion hole 5 through the expansion cylinder 14 after the drive plate 11 opens the baffle 4, avoiding operational interference. Through the sliding engagement of multiple inclined slots 16 on the rotating plate 15 with the column rod 17 on the drive plate 11, multiple insertion shafts 12 can be driven to move radially synchronously by simply rotating the rotating plate 15, realizing the synchronous opening or retraction of multiple baffles 4. The structure is simple and the operation is convenient. At the same time, the expansion cylinder 14 provides a guide passage for the clamping rod 6, so that the hole expansion and insertion actions are completed continuously, improving the continuity of the installation operation.

[0048] Example 3 When sealing municipal sewage pipes, the inner diameter of the sewage pipes can reach 800mm to 1000mm. This results in a corresponding increase in the size of the baffle 4, sealing ring 2, and sealing strip 3. As a result, it will be more difficult to rotate the regular hexagonal block 22, and it may even be impossible to rotate it.

[0049] Combination Figure 8 and Figure 9 As shown, a pivot rod 18 is rotatably mounted on the outer periphery of the expansion cylinder 14. One end of the pivot rod 18 is constructed with a regular hexagonal block 22. The pivot rod 18 is coupled to one of the column rods 17. When the pivot rod 18 rotates, the corresponding column rod 17 moves together.

[0050] Preferred, combined Figure 8 As shown, the pivot rod 18 has threads on its outer periphery, and one of the rods 17 has a threaded block 21 at its end, which is threaded onto the pivot rod 18.

[0051] Working principle of driving the rotating plate 15 to rotate: When the size of the pipe shut-off device is large and it is difficult to directly rotate the rotating plate 15, a wrench can be used to turn the regular hexagonal block 22 at one end of the pivot rod 18. When the pivot rod 18 rotates, the thread on its outer circumference drives the threaded block 21, which is threaded and fitted onto it, to move axially along the pivot rod 18. The threaded block 21 drives the corresponding column rod 17 to move. Since the column rod 17 is simultaneously sliding tangentially in the inclined groove 16 of the rotating plate 15, the column rod 17 will slide along the inclined groove 16 when it moves, thus... The rotating plate 15 is driven to rotate. After the rotating plate 15 rotates, the other inclined slots 16 synchronously drive the other columns 17 and drive plates 11 to move radially. Finally, the multiple insert shafts 12 synchronously open or close the baffle 4. Through the force amplification effect of the threaded engagement, the rotational motion of the pivot rod 18 is converted into the sliding force of the column rod 17 along the inclined slot 16, making the operation more labor-saving. Moreover, the threaded engagement has self-locking properties, so that the rotating plate 15 will not rotate on its own after the hexagonal block 22 is released.

[0052] It should be emphasized that the core improvement of this embodiment is that: by forming a threaded transmission between the pivot rod 18 and the threaded block 21 at the end of the corresponding column rod 17, the rotational force applied by the wrench to the regular hexagonal block 22 is converted into a thrust that drives the column rod 17 to slide along the inclined groove 16. The force amplification characteristic of the thread drives the rotating plate 15 to rotate, thereby effectively reducing the operating force required to open the baffle 4 under large-diameter working conditions. This solves the problem of difficult rotation or even inability to rotate due to the increase in component size. Moreover, because the threaded engagement has self-locking properties, there is no need to continue applying pressure to the rotation after the rotation of the rotating plate 15 is completed, making it more convenient to use.

[0053] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A pipe shut-off device, characterized in that, The device includes a steel ring (1) and a sealing ring (2) installed on the inner circumference of the steel ring (1). The outer circumference of the steel ring (1) is used to contact the inner circumference of the pipe. Multiple sealing strips (3) are distributed in a circular array on the inner circumference of the sealing ring (2). A baffle (4) is provided between adjacent sealing strips (3). Multiple baffles (4) and sealing strips (3) are spliced ​​together to form a socket (5) coaxial with the steel ring (1). The device also includes a pressing rod (6). When the pressing rod (6) is inserted into the socket (5), the pressing rod (6) provides a resisting force to the multiple baffles (4) in a direction away from the steel ring (1). A positioning element (7) is installed on the pressing rod (6). After the pressing rod (6) is inserted into the socket (5), the positioning element (7) is used to release the pressing rod (6) or fix it on the baffle (4).

2. The pipe shut-off device according to claim 1, characterized in that, The baffle (4) is fan-shaped and one end near the axis of the steel ring (1) is flat. The cross section of the clamping rod (6) is a regular polygon. The sealing ring (2) has multiple arc-shaped slots (8) arranged in a circular array on one end face. The baffle (4) has a snap-fit ​​arc plate (9) constructed on its arc surface. The snap-fit ​​arc plate (9) is installed in the arc-shaped slot (8) by bolts.

3. A pipe shut-off device according to claim 2, characterized in that, The positioning component (7) includes a plurality of plug-in plates (701) that are slidably mounted in a circular array on the outer periphery of the abutting rod (6). The baffle (4) has a positioning groove (703) for the plug-in plates (701) to be inserted on one end of the plane near the axis of the steel ring (1). One end of the abutting rod (6) is provided with a torsion member (702), which drives the plurality of plug-in plates (701) to move synchronously.

4. A pipe shut-off device according to claim 3, characterized in that, A spring sheet (7024) is installed between the plug plate (701) and the clamping rod (6). The torsion member (702) includes a movable plate (7021) that is slidably installed in the clamping rod (6). A plurality of touch plates (7022) are installed in a circular array on the movable plate (7021). A forcing slope (7026) is constructed on one side of the plug plate (701) located in the clamping rod (6). The plurality of touch plates (7022) respectively contact the plurality of forcing slopes (7026). A drive screw (7023) that is threaded through the movable plate (7021) is rotatably installed at one end of the clamping rod (6).

5. A pipe shut-off device according to claim 1, characterized in that, One end face of the baffle (4) is the mounting surface, and the other end face is the extrusion surface. The sealing strip (3) is installed on the mounting surface of the baffle (4) by bolts, and the sealing strip (3) abuts against the extrusion surface of the adjacent baffle (4).

6. A pipe shut-off device according to claim 4, characterized in that, One end of the plug plate (701) is constructed with a guide slope (7025). There are six plug plates (701). One end of the abutting plug rod (6) is constructed with a limiting plate (19). When the limiting plate (19) is attached to multiple baffles (4), multiple plug plates (701) are respectively inserted into multiple positioning slots (703).

7. A pipeline auxiliary construction device, characterized in that, Using the pipe shut-off device as described in any one of claims 1-6, a positioning hole (20) is provided on one end face of each of the multiple baffles (4), and the multiple positioning holes (20) are arranged in a circular array around the axis of the steel ring (1). The pipe auxiliary construction equipment also includes a support seat (10), on which multiple drive plates (11) are slidably mounted in a circular array. The drive plates (11) are provided with insert shafts (12) for insertion into the positioning holes (20), and the support seat (10) is provided with a spreading mechanism (13) for driving the multiple drive plates (11) to move closer or further away from each other synchronously.

8. A pipeline auxiliary construction equipment according to claim 7, characterized in that, The spreading mechanism (13) includes an expansion cylinder (14) that is inserted into the bearing seat (10). The expansion cylinder (14) is used for the insertion rod (6) to pass through. A rotating plate (15) is rotatably installed on the outer periphery of the expansion cylinder (14). Multiple inclined slots (16) are opened in a circular array on the rotating plate (15). A column rod (17) is constructed on the drive plate (11). The multiple column rods (17) slide tangentially in the multiple inclined slots (16).

9. A pipeline auxiliary construction equipment according to claim 8, characterized in that, A pivot rod (18) is rotatably mounted on the outer periphery of the expansion cylinder (14). One end of the pivot rod (18) is constructed with a regular hexagonal block (22). The pivot rod (18) is coupled to one of the columns (17). When the pivot rod (18) rotates, the corresponding column (17) moves together.

10. A pipeline auxiliary construction device according to claim 9, characterized in that, The pivot rod (18) has a thread on its outer periphery, and one of the rods (17) has a threaded block (21) at its end, which is threaded onto the pivot rod (18).

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