Cable conduit plugging device

Abstract

The invention discloses a cable pipeline plugging device, and relates to the field of plugging devices, the cable pipeline plugging device comprises a main body and a synchronous locker, the synchronous locker is detachably installed at one end of the main body, the main body comprises two half shells, and the two half shells are in butt joint to define a cylindrical structure with a cable channel; each half shell is provided with a panel, a movable plate, a fixed plate and a movable tail plate in the direction away from the synchronous locker, sealing rubber rings are arranged between the movable plates and the fixed plates and between the fixed plates and the movable tail plates, and the main body is provided with a plurality of tensioning screws sequentially penetrating into the movable tail plates from one side of the panel. When the tensioning screws rotate in the circumferential direction of the tensioning screws, the movable plate and the movable tail plate can be driven to be close to or away from the fixed plate at the same time so as to extrude or release the sealing rubber ring, and the two half shells are hinged to each other through one of the tensioning screws; a plurality of driving wrenches are arranged on the synchronous locker and can drive the multiple tensioning screws to rotate synchronously. The plugging device has the advantage of good plugging stability.

Description

Technical Field

[0001] This invention relates to the field of plugging technology, and specifically to a cable duct plugging device. Background Technology

[0002] Cable duct sealing is a protective technology used to protect underground cable ducts. Its core functions include preventing sewage from seeping into and soaking the cables, blocking rodent damage, reducing silt blockage, and preventing seepage from endangering the safety of adjacent facilities. This technology is divided into two categories: traditional curing sealant and new expansion flexible sealant. The former uses fireproof putty or cement materials, which are prone to cracking due to thermal expansion and contraction, while the latter achieves self-adaptive sealing through rubber expansion.

[0003] Existing cable trench pipe plugs have insufficient single-point sealing reliability and are prone to tilting due to gravity, resulting in uneven circumferential pressure on the sealing ring. This can lead to problems such as local leakage, accelerated wear and premature aging, affecting long-term sealing stability. Summary of the Invention

[0004] This invention aims to address one of the technical problems in related technologies to a certain extent. Therefore, this invention provides a cable duct plugging device with the advantage of good plugging stability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A cable duct plugging device includes a main body and a synchronous locking device. The synchronous locking device is detachably installed at one end of the main body. The main body includes two half-shells, which are joined together to form a cylindrical structure with a cable channel. Each half-shell has a panel, a movable plate, a fixed plate, and a movable tail plate in a direction away from the synchronous locking device. Sealing rings are provided between the movable plate and the fixed plate, and between the fixed plate and the movable tail plate. The main body is provided with a plurality of tensioning screws that pass sequentially from one side of the panel into the movable tail plate. When the tensioning screws rotate in their circumferential direction, they can drive the movable plate and the movable tail plate to move closer to or away from the fixed plate simultaneously, thereby squeezing or releasing the sealing rings. The two half-shells are hinged to each other by one of the tensioning screws. The synchronous locking device is provided with a plurality of drive wrenches, which can drive the plurality of tensioning screws to rotate synchronously.

[0006] In this application, a double sealing ring structure with front and rear settings forms a double sealing barrier along the main body axis, improving the reliability of the sealing and its waterproof and moisture-proof performance. The synchronous locking device is equipped with several drive wrenches. Through the cooperation of the drive wrenches and tension screws, multiple tension screws on the main body can be driven to rotate circumferentially in a synchronous manner. When the tension screws rotate in a certain direction, the movable plate and the movable tail plate will move simultaneously along the direction closer to the fixed plate to compress the sealing rings. After being compressed, the sealing rings will expand and adhere to the inner wall of the cable duct. When the tension screws reverse, they will drive the movable plate and the movable tail plate to move simultaneously along the direction away from the fixed plate to release the sealing rings. The synchronous locking device uses multiple drive wrenches to simultaneously drive multiple tension screws on the main body to rotate, keeping the movable plate and movable tail plate relatively parallel as they approach the fixed plate. This compresses the sealing ring, avoiding the severe swaying of the movable plate and movable tail plate that occurs when tightening the tension screws one by one in the traditional method. The synchronous drive of multiple tension screws greatly improves installation efficiency and stability, reduces structural damage caused by swaying of the movable plate and movable tail plate, extends product lifespan, and results in better sealing effect and stability of the sealing device.

[0007] Optionally, both the movable plate and the movable tail plate are provided with anti-rotation nut sleeves that are threadedly fitted with the tensioning screw; the tensioning thread surface is provided with a first thread and a second thread, the first thread cooperating with the anti-rotation nut sleeve in the movable plate to drive the movable plate to move, and the second thread cooperating with the anti-rotation nut sleeve in the movable tail plate to drive the movable tail plate to move, the first thread and the second thread having opposite thread directions; the end of the tensioning screw located in the panel is provided with a first synchronous drive groove for cooperating with the drive wrench.

[0008] The anti-rotation nut sleeve has a polygonal outer shape and does not rotate on its own. It only moves along the axial direction of the tensioning screw as the tensioning screw rotates. Depending on the rotation direction of the tensioning screw, it moves closer to or away from the fixed plate. During the movement, it drives the movable plate and the movable tail plate to move synchronously, thereby squeezing the sealing ring.

[0009] Optionally, the tensioning screw is provided with a first limiting plate that abuts against the side of the panel near the movable plate; the fixed plate is provided with a bearing sleeved on the surface of the tensioning screw.

[0010] The first limiting plate restricts the axial movement of the tensioning screw relative to the panel, and the bearing restricts the axial movement of the tensioning screw relative to the fixed plate, so that the tensioning screw can only rotate circumferentially relative to the panel and the fixed plate. To further improve the assembly stability of the fixed plate and the tensioning screw, a first limiting plate located on the side of the fixed plate away from the movable plate can also be installed on the tensioning screw.

[0011] Optionally, the tensioning screws are configured as four, and the four tensioning screws are arranged in a ring-shaped array with equal spacing along the cylindrical structure formed by the two half-shells.

[0012] When the tension screws are driven to rotate by the drive wrench on the synchronous locking device, the four tension screws are arranged in a ring with equal spacing. During synchronous rotation, the four tension screws can evenly transmit the driving force to the movable plate and the movable tail plate.

[0013] Optionally, the sealing ring located between the movable plate and the fixed plate has gaps at both ends, and the sealing ring located between the fixed plate and the movable tail plate has gaps at both ends. At least one ring of waterproof tape covering the gaps at both ends of the sealing ring is adhered to the surface of both sealing rings.

[0014] At least one ring of waterproof tape is adhered to the surface of each of the two sealing rings, covering the gaps at both ends of the sealing rings. The waterproof tape typically has a certain degree of flexibility and adhesion, allowing it to adhere tightly to the surface of the sealing rings and preventing moisture or dust from entering the cable conduit through the gaps at both ends of the sealing rings.

[0015] Optionally, the main body is further provided with multiple locking mechanisms. The synchronous locking device can selectively drive multiple locking mechanisms or multiple tension screws to rotate synchronously. The locking mechanism includes a driving cavity and a locking screw for pressing against the inner wall of the pipe. The driving cavity is provided in both the panel and the fixed plate, and the driving cavities in the two are arranged opposite to each other. The end of the locking screw passes through two opposite driving cavities from one side of the panel and extends into the movable tail plate. A second limiting plate is fixedly provided on the locking screw, abutting against the side of the panel near the movable plate.

[0016] The main body has multiple locking mechanisms, and the synchronous locking device can selectively drive multiple locking mechanisms or multiple tension screws to rotate synchronously. Therefore, the synchronous locking device can select and control multiple locking mechanisms or multiple tension screws to operate simultaneously according to different working conditions and needs, thereby adjusting the different functions of the plugging device and enabling the plugging device to have multiple functional modes.

[0017] Optionally, the locking screw has a threaded section and a smooth section on its surface. The threaded section is formed on the portion of the locking screw located within the drive cavity, and the remaining portion of the locking screw is the smooth section. The drive cavity contains a slider, a drive block, and a spring. The slider has a clearance hole for the locking screw to pass through. One side of the slider is inclined. The locking screw is threaded with a drive block located within the drive cavity. The drive block has an inclined side opposite the slider, and the two inclined sides abut against each other. The width of the drive block and the slider matches the width of the drive cavity. One side of the drive cavity has an opening communicating with the outside, and a sealing ring is embedded in the opening. The slider has a positioning claw extending into the opening. The spring abuts against the slider and the inner wall of the drive cavity, and the spring and the positioning claw are on the same side. The end of the locking screw located inside the panel has a second synchronous drive groove for cooperating with the drive wrench.

[0018] The locking screw has a threaded section and a smooth section on its surface. The threaded section is located within the drive cavity, allowing the locking screw to engage with the drive block and achieve transmission. The remaining portion of the locking screw is the smooth section, which reduces friction with surrounding components and, in some cases, facilitates installation and positioning. One end of the locking screw, located within the panel, has a second synchronous drive groove for engaging with a drive wrench. When the drive wrench is inserted into the second synchronous drive groove, it rotates the locking screw, thereby driving the locking mechanism.

[0019] Optionally, the synchronous locking device is provided with holes that allow cables to pass through and main drive sprockets distributed around the holes. Multiple main drive sprockets rotate synchronously through a transmission chain. The synchronous locking device includes a U-shaped pin and two arc-shaped shells. The two arc-shaped shells are joined together to form a ring structure and are hinged to each other through one of the main drive sprockets. Each of the two arc-shaped shells has a insertion hole at the end away from the hinge. The U-shaped pin is connected to one of the arc-shaped shells through a flexible connecting band, and the U-shaped pin can be inserted into both insertion holes simultaneously to connect the two arc-shaped shells.

[0020] The synchronous locking device consists of two arc-shaped shells joined together to form a ring structure, with the two arc-shaped shells hinged together by one of the main drive sprockets. Each arc-shaped shell has a socket at the end furthest from the hinge, the position and size of which match the U-shaped pin. The connecting strap is made of plastic and can be bent to prevent the U-shaped pin from falling off after being pulled out, making it more convenient to use. After pulling out the U-shaped pin, the two arc-shaped shells open, and the synchronous locking device is secured to the cable through the holes. After closing, it is fixed by the U-shaped pin. Moving the synchronous locking device to align with the panel allows multiple drive wrenches to be inserted into multiple second synchronous drive slots.

[0021] Optionally, each of the main drive sprockets corresponds to a locking screw, and multiple main drive sprockets rotate synchronously via a transmission chain. One end of each main drive sprocket extends to the side of the arc-shaped shell away from the main body and forms a third synchronous drive groove, while the other end extends to the side of the arc-shaped shell close to the main body and is connected to the drive wrench. Inside the arc-shaped shell, a guide sprocket set corresponding to each transmission chain is rotatably arranged. The guide sprocket set includes at least two guide sprockets supported in the middle of the transmission chain and respectively meshing with opposite sides of the transmission chain.

[0022] Multiple main drive sprockets are distributed around the holes and interconnected by a transmission chain. When one main drive sprocket rotates, the other main drive sprockets rotate synchronously via the transmission chain, ensuring the consistency of the actions of all parts of the synchronous locking device. Inserting an electric wrench into any of the third synchronous drive slots will drive multiple main drive sprockets to rotate via the transmission chain. Since the drive wrenches and the third synchronous drive slots are located at opposite ends of the main drive sprockets, inserting the electric wrench into any of the third synchronous drive slots will drive all the main drive sprockets to rotate, thus enabling all the drive wrenches to rotate. Therefore, inserting multiple drive wrenches into the corresponding second synchronous drive slots will drive multiple locking screws to rotate synchronously, causing the positioning claws to extend and tighten the inner wall of the pipe. The third synchronous drive slot is also an internal hexagonal slot and can be driven by an internal hexagonal wrench.

[0023] Optionally, the diameter of the side of the panel facing the synchronous locking device is larger than that of the other side, and the side of the panel with the larger diameter is provided with a locking mark corresponding to the locking mechanism.

[0024] The larger diameter on the side facing the synchronizing lock provides a more ample contact area and space for connection and engagement with the synchronizing lock. Furthermore, the locking markings allow users to easily identify the locking screw and tensioning screw, enabling them to quickly locate the area requiring operation, improving work efficiency and reducing errors.

[0025] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of the present invention will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of the present invention. In addition, each of these features, elements and components appearing in the following text and drawings is a plurality of, and different symbols or numbers are used for convenience of representation, but all represent parts with the same or similar construction or function. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the combined structure of the main body and the synchronous locking device of the present invention; Figure 2 This is a schematic diagram of the main body of the invention and the synchronous locking device in a separated state. Figure 3 This is a side view of the synchronous locking device structure of the present invention; Figure 4 This is a cross-sectional view of the synchronous locking device structure of the present invention; Figure 5 This is a cross-sectional view of the tensioning screw structure of the present invention; Figure 6 for Figure 5 Enlarged view of the structure at point A in the middle; Figure 7 This is a side view of the main structure of the present invention; Figure 8 This is a cross-sectional view of the locking mechanism structure of the present invention; Figure 9 for Figure 8 Enlarged view of the structure at point A in the middle.

[0027] The components include: 1. Main body; 11. Half shell; 111. Panel; 112. Movable plate; 113. Fixed plate; 1131. Bearing; 114. Movable tail plate; 12. Sealing ring; 13. Tensioning screw; 131. First limiting plate; 132. First synchronous drive groove; 14. Anti-rotation nut sleeve; 15. Locking mechanism; 151. Drive cavity; 152. Locking screw; 1521. Second synchronous drive groove; 153. 154. Second limiting plate; 155. Slider; 156. Clearance hole; 157. Drive block; 158. Sealing ring; 159. Positioning claw; 150. Spring; 16. Waterproof tape; 17. Locking mark; 2. Synchronous locking device; 21. Main drive sprocket; 22. Transmission chain; 23. Arc-shaped shell; 24. U-shaped pin; 25. Connecting belt; 26. Third synchronous drive groove; 27. Drive wrench; 28. Guide sprocket assembly. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain the present invention and should not be construed as limiting the invention.

[0029] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this patent. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0030] Example: like Figures 1 to 6As shown, this embodiment provides a cable duct plugging device, including a main body 1 and a synchronous locking device 2. The synchronous locking device 2 is detachably installed at one end of the main body 1. The main body 1 includes two half-shells 11, which are joined together to form a cylindrical structure with a cable channel. Each half-shell 11 is provided with a panel 111, a movable plate 112, a fixed plate 113, and a movable tail plate 114 in the direction away from the synchronous locking device 2. The movable plate 112 and the fixed plate 113, as well as the fixed plate 113 and the movable tail plate 114 are connected. Each half-shell 11 is provided with a sealing ring 12. The main body 1 is provided with a plurality of tensioning screws 13 that pass through the panel 111 from one side to the movable tail plate 114. When the tensioning screws 13 rotate around their own circumference, they can drive the movable plate 112 and the movable tail plate 114 to move closer to or away from the fixed plate 113 at the same time, so as to squeeze or release the sealing rings 12. The two half-shells 11 are hinged to each other through one of the tensioning screws 13. The synchronous locking device 2 is provided with a plurality of driving wrenches 27, which can drive the plurality of tensioning screws 13 to rotate synchronously.

[0031] In this embodiment, the cable duct plugging device includes a main body 1 and a synchronous locking device 2. The synchronous locking device 2 is detachably installed at one end of the main body 1 for easy installation, disassembly, and subsequent maintenance. The main body 1 includes two interlocking half-shells 11, which together form a cylindrical structure. A cable channel is formed in the middle of this cylindrical structure to accommodate cables, allowing the cable to pass through after the plugging device seals the cable duct. Each half-shell 11 has a panel 111, a movable plate 112, a fixed plate 113, and a movable tail plate 114 arranged sequentially in the direction away from the synchronous locking device 2. Sealing rings 12 are provided between the movable plate 112 and the fixed plate 113, and between the fixed plate 113 and the movable tail plate 114. The outer wall of the sealing rings 12 is used to fit against the duct to prevent external moisture, dust, etc. from entering the cable duct, thus protecting the cable's operating environment. The main body 1 is equipped with multiple tension screws 13, which pass sequentially from one side of the panel 111 into the movable tail plate 114. The two half-shells 11 are hinged together by one of the tension screws 13, allowing them to open and close around the hinge point, facilitating installation and removal from the cable. Specifically, the cable is inserted when the two half-shells 11 are open, and the plug is installed on the cable when they are closed.

[0032] The synchronous locking device 2 is equipped with several drive wrenches 27. Through the cooperation of the drive wrenches 27 and the tensioning screws 13, the multiple tensioning screws 13 on the main body 1 can be driven to rotate circumferentially in a synchronous manner. When the tensioning screws 13 rotate in a certain direction, the movable plate 112 and the movable tail plate 114 will move simultaneously in the direction close to the fixed plate 113 to compress the sealing ring 12. After being compressed, the sealing ring 12 will expand and adhere to the inner wall of the cable duct. When the tensioning screws 13 reverse, the movable plate 112 and the movable tail plate 114 will move simultaneously in the direction away from the fixed plate 113 to release the sealing ring 12. The multiple drive wrenches 27 on the synchronous locking device 2 synchronously drive the multiple tension screws 13 on the main body 1 to rotate, so that the movable plate 112 and the movable tail plate 114 are kept in a relatively parallel state and close to the fixed plate 113, thereby squeezing the sealing ring 12. This avoids the serious swaying of the movable plate 112 and the movable tail plate 114 caused by the traditional method of tightening the tension screws 13 one by one. The synchronous drive of multiple tension screws 13 greatly improves the installation efficiency and stability, reduces the structural damage caused by the swaying of the movable plate 112 and the movable tail plate 114, improves the service life of the product, and makes the sealing effect and stability of the plug better.

[0033] In addition, the synchronous locking device 2 drives multiple tensioning screws 13 to rotate circumferentially, which ensures that the distance between the two sealing rings 12 and the inner wall of the pipe remains consistent. After the sealing rings 12 expand, the pressure on the ring is more uniform, resulting in better adhesion to the inner wall of the pipe. Furthermore, the sealing rings 12 are not affected by gravity, which would cause the bottom of the sealing rings 12 to experience greater pressure than the top. This would prevent gaps, shaking, and accelerated local aging during long-term use, thus increasing the durability of the main body 1.

[0034] Panel 111, movable plate 112, fixed plate 113 and movable tail plate 114 are all made of engineering plastics, and their surfaces are treated with micro-arc oxidation or sprayed with Teflon (PTFE) coating to form a dense protective film, giving them excellent weather resistance, corrosion resistance and anti-aging properties.

[0035] Both the movable plate 112 and the movable tail plate 114 are provided with anti-rotation nut sleeves 14 that are threadedly engaged with the tensioning screw 13; the tensioning thread surface is provided with a first thread and a second thread. The first thread cooperates with the anti-rotation nut sleeve 14 in the movable plate 112 to drive the movable plate 112 to move, and the second thread cooperates with the anti-rotation nut sleeve 14 in the movable tail plate 114 to drive the movable tail plate 114 to move. The first thread and the second thread have opposite thread directions; the end of the tensioning screw 13 located in the panel 111 is provided with a first synchronous drive groove 132 for cooperating with the drive wrench 27.

[0036] In this embodiment, polygonal anti-rotation nut sleeves 14 are provided inside both the movable plate 112 and the movable tail plate 114, and are threadedly connected to the tensioning screw 13. The anti-rotation nut sleeves 14 are fixed inside the movable plate 112 and the movable tail plate 114 and cannot rotate on their own. When the tensioning screw 13 rotates, since the anti-rotation nut sleeves 14 cannot rotate, according to the principle of threaded transmission, the anti-rotation nut sleeves 14 will move along the axial direction of the tensioning screw 13, thereby driving the connected movable plate 112 or movable tail plate 114 to move together, converting the rotational motion of the tensioning screw 13 into the linear motion of the movable plate 112 and the movable tail plate 114, thus achieving the compression operation of the sealing ring 12. The surface of the tensioning screw 13 is provided with a first thread and a second thread. The first thread engages with the anti-rotation nut sleeve 14 inside the movable plate 112, and the second thread engages with the anti-rotation nut sleeve 14 inside the movable tail plate 114. The first and second threads have opposite directions. Therefore, when the tensioning screw 13 rotates, the anti-rotation nut sleeve 14 in the movable plate 112 that mates with the first thread and the anti-rotation nut sleeve 14 in the movable tail plate 114 that mates with the second thread will move in opposite directions to bring the movable plate 112 and the movable tail plate 114 closer or further apart. Specifically, there is a gap between the anti-rotation nut sleeve 14 and the movable plate 112 and the movable tail plate 114. When the user directly drives a single tensioning screw 13 with an electric wrench, there is a wobble gap between the anti-rotation nut sleeve 14 and the movable plate 112 and the movable tail plate 114. A rubber pad is placed inside the gap to reduce damage to the movable plate 112 and the movable tail plate 114 during the wobble process. This wobble gap disappears after the pressure sealing ring 12 is in place, ensuring the stability of the movable plate 112 and the movable tail plate 114. The first synchronous drive slot 132 is used to cooperate with the drive wrench 27. When the operator inserts the drive wrench 27 into the first synchronous drive slot 132, the rotation of the drive wrench 27 is directly transmitted to the tensioning screw 13, causing the tensioning screw 13 to rotate around its own axis, thereby realizing the control of the movable plate 112 and the movable tail plate 114. Specifically, the first synchronous drive slot 132 is an internal hexagonal slot, which can be driven by the drive wrench 27 with an internal hexagonal structure.

[0037] The tensioning screw 13 is provided with a first limiting plate 131 that abuts against the side of the panel 111 near the movable plate 112; the fixed plate 113 is provided with a bearing 1131 that is sleeved on the surface of the tensioning screw 13.

[0038] In this embodiment, when the tensioning screw 13 is subjected to an external force and tends to move axially away from the main body 1, the first limiting plate 131 and the panel 111 block each other. Since the first limiting plate 131 is fixed on the tensioning screw 13 and the position of the panel 111 is relatively fixed, the movement of the tensioning screw 13 relative to the panel 111 in the axial direction is restricted, ensuring that the tensioning screw 13 can only rotate circumferentially and will not have significant axial movement. The inner ring of the bearing 1131 is tightly fitted with the tensioning screw 13, and the outer ring is tightly fitted with the inner hole of the fixing plate 113. The rolling elements (such as balls or rollers) inside the bearing 1131 roll between the inner and outer rings, allowing the tensioning screw 13 to rotate relative to the fixing plate 113. At this time, the fixing plate 113 will not rotate with the tensioning screw 13. Meanwhile, the bearing 1131 restricts the axial movement of the tensioning screw 13 relative to the fixed plate 113, ensuring that the tensioning screw 13 can only rotate circumferentially relative to the fixed plate 113, thus guaranteeing the smoothness and stability of the tensioning screw 13's rotation. To further improve the assembly stability of the fixed plate 113 and the tensioning screw 13, a first limiting plate 131 located on the side of the fixed plate 113 away from the movable plate 112 can be installed on the tensioning screw 13. The first limiting plates 131 on both sides of the fixed plate 113 then limit the fixed plate 113 from both axial directions. When the tensioning screw 13 tends to move axially, the first limiting plates 131 on both sides will contact the two sides of the fixed plate 113 respectively and generate a blocking force, preventing the fixed plate 113 from displacing relative to the tensioning screw 13 in the axial direction. This makes the assembly between the fixed plate 113 and the tensioning screw 13 more secure, reducing assembly loosening problems caused by vibration, external impact, etc., and further ensuring the stability and reliability of the sealing device structure.

[0039] The tensioning screws 13 are configured as four, and the four tensioning screws 13 are arranged in a ring-shaped array with equal spacing along the cylindrical structure formed by the two half-shells 11.

[0040] In this embodiment, when the tensioning screws 13 are driven to rotate by the drive wrench 27 on the synchronous locking device 2, since the four tensioning screws 13 are arranged in a ring with equal spacing, they can evenly transmit the driving force to the movable plate 112 and the movable tail plate 114 during synchronous rotation. For example, when the drive wrench 27 drives the tensioning screws 13 to rotate to compress the sealing ring 12, the four tensioning screws 13 act simultaneously, making the forces on the movable plate 112 and the movable tail plate 114 more balanced in all directions, thus avoiding uneven sealing caused by excessive or insufficient local force.

[0041] like Figures 1 to 7As shown, the sealing ring 12 located between the movable plate 112 and the fixed plate 113 has gaps at both ends with both of them, and the sealing ring 12 located between the fixed plate 113 and the movable tail plate 114 has gaps at both ends with both of them. At least one ring of waterproof tape 16 covering the gaps at both ends of the sealing ring 12 is adhered to the surface of both sealing rings 12.

[0042] In this embodiment, sealing rings 12 are respectively provided between the movable plate 112 and the fixed plate 113, and between the fixed plate 113 and the movable tail plate 114. However, due to factors such as size mismatch during installation, unevenness of the plate surface, or elastic deformation of the sealing ring 12 itself, gaps exist between both ends of the sealing ring 12 and the movable plate 112, the fixed plate 113, and the movable tail plate 114. At least one layer of waterproof tape 16 is adhered to the surface of each sealing ring 12, and the waterproof tape 16 covers the gaps at both ends of the sealing ring 12. The waterproof tape 16 typically has a certain degree of flexibility and adhesion, and can tightly adhere to the surface of the sealing ring 12, thus preventing moisture or dust from entering the cable conduit through the gaps at both ends of the sealing ring 12. When prying open the two half-shells 11, first peel off the waterproof tape 16, and after the cable is put on, close the half-shells 11 and stick on the waterproof tape 16 to cover the gap between the two ends of the sealing ring 12. Since the tape is used for bonding, the end of the two half-shells 11 away from the hinge only needs to be connected by a simple clip.

[0043] like Figure 8 and Figure 9 As shown, the main body 1 is also provided with multiple locking mechanisms 15. The synchronous locking device 2 can selectively drive multiple locking mechanisms 15 or multiple tensioning screws 13 to rotate synchronously. The locking mechanism 15 includes a driving cavity 151 and a locking screw 152 for pressing against the inner wall of the pipe. Both the panel 111 and the fixing plate 113 are provided with driving cavities 151, and the driving cavities 151 in the two are arranged opposite to each other. The end of the locking screw 152 passes through the two opposite driving cavities 151 from one side of the panel 111 and passes through the movable tail plate 114. A second limiting plate 153 is fixedly provided on the locking screw 152, which abuts against the side of the panel 111 near the movable plate 112.

[0044] In this embodiment, the main body 1 has multiple locking mechanisms 15, and the synchronous locking device 2 can selectively drive multiple locking mechanisms 15 or multiple tension screws 13 to rotate synchronously. Therefore, the synchronous locking device 2 can select and control multiple locking mechanisms 15 or multiple tension screws 13 to operate simultaneously according to different working conditions and needs, thereby adjusting the different functions of the plug and enabling the plug to have multiple functional modes. Both the panel 111 and the fixed plate 113 are provided with driving cavities 151, and the driving cavities 151 in the two are arranged opposite to each other. Under the drive of the synchronous locking device 2, the locking screw 152 can press against the inner wall of the pipe. The end of the locking screw 152 passes through the two opposite driving cavities 151 from one side of the panel 111 and extends into the movable tail plate 114, so that the locking screw 152 can connect the panel 111, the fixed plate 113 and the movable tail plate 114. A second limiting plate 153 is fixedly installed on the locking screw 152. The second limiting plate 153 abuts against the side of the panel 111 near the movable plate 112 to restrict the axial movement of the locking screw 152 and ensure the structural stability of the locking mechanism 15. Specifically, there are four locking mechanisms 15. The four locking screws 152 are adjacent to the four tension screws 13, and the tension screws 13 are used to drive the movable plate 112 and the movable tail plate 114 to move. The operation of the two does not affect each other.

[0045] The locking screw 152 has a threaded section and a smooth section on its surface. The threaded section is formed in the part of the locking screw 152 located inside the drive cavity 151, and the remaining part of the locking screw 152 is a smooth section. The drive cavity 151 is provided with a slider 154, a drive block 156, and a spring 159. The slider 154 is provided with a clearance hole 155 for the locking screw 152 to pass through. One side of the slider 154 is inclined. The locking screw 152 is threaded with the drive block 156 located inside the drive cavity 151. The side of the drive block 156 opposite to the inclined surface of the slider 154 is inclined. The two inclined surfaces abut against each other; the width of the drive block 156 and the slider 154 matches the width of the drive cavity 151. One side of the drive cavity 151 is provided with an opening communicating with the outside and a sealing ring 157 is embedded in the opening. A positioning claw 158 extending into the opening is formed on the slider 154. A spring 159 abuts between the slider 154 and the inner wall of the drive cavity 151 and is provided on the same side as the positioning claw 158. The locking screw 152 is provided with a second synchronous drive groove 1521 for cooperating with the drive wrench 27 at one end inside the panel 111.

[0046] In this embodiment, the locking screw 152 has a threaded section and a smooth section on its surface. The threaded section is located within the drive cavity 151, allowing the locking screw 152 to engage with the drive block 156 within the drive cavity 151, thus achieving a transmission function. The remaining portion of the locking screw 152 is a smooth section, which reduces friction with surrounding components and facilitates installation and positioning of the locking screw 152 in some cases. One end of the locking screw 152 located within the panel 111 has a second synchronous drive groove 1521 for engaging with the drive wrench 27. When the drive wrench 27 is inserted into the second synchronous drive groove 1521, it drives the locking screw 152 to rotate, thereby driving the locking mechanism 15. The clearance hole 155 does not affect the rotation of the locking screw 152. The slider 154 has a clearance hole 155 for the locking screw 152 to pass through, allowing the slider 154 to move axially along the locking screw 152. One side of the slider 154 is an inclined surface, which cooperates with the inclined surface of the drive block 156. When the drive block 156 moves, it can push the slider 154 to move through the action of the inclined surface. The drive block 156 is threaded onto the locking screw 152 located in the drive cavity 151. The clearance hole 155 is U-shaped to allow the slider 154 to slide within the drive cavity 151. The side of the drive block 156 opposite to the inclined surface of the slider 154 is also an inclined surface, and it abuts against the inclined surface of the slider 154. When the locking screw 152 rotates, the drive block 156 moves along the thread direction of the locking screw 152. Due to the interaction of the inclined surfaces, it pushes the slider 154 to move linearly within the drive cavity 151. A positioning claw 158 is formed on the slider 154 and extends into the opening of the drive cavity 151. The slider 154 moves linearly in the drive cavity 151 so that the positioning claw 158 extends out from the opening and abuts against the inner wall of the pipe, thereby realizing the abutment of the locking mechanism 15 against the inner wall of the pipe.

[0047] The specific working principle is as follows: When the locking screw 152 is driven to rotate by the synchronous locking device 2, since the width of the driving block 156 and the slider 154 matches the width of the driving cavity 151, the driving block 156 cannot rotate with the locking screw 152, but can only move along the axial direction of the locking screw 152. According to the rotation direction of the locking screw 152, the locking screw 152 drives the driving block 156 to contact or move away from the slider 154. When the driving block 156 contacts the slider 154, the slider 154 causes the positioning claw 158 to extend, and at the same time, the slider 154 compresses the spring 159. When the driving block 156 moves away from the slider 154, the spring 159 rebounds and causes the slider 154 to reset, and the slider 154 retracts the positioning claw 158. The synchronous locking device 2 can drive multiple positioning claws 158 to synchronously and evenly radially tighten the inner wall of the pipe, so that the main body 1 is accurately centered and fixed, avoiding the problems of skewing and local stress concentration caused by gravity.

[0048] The synchronous locking device 2 is provided with holes that allow cables to pass through and main drive sprockets 21 distributed around the holes. Multiple main drive sprockets 21 rotate synchronously through a transmission chain 22. The synchronous locking device 2 includes a U-shaped pin 24 and two arc-shaped shells 23. The two arc-shaped shells 23 are joined together to form a ring structure and are hinged to each other through one of the main drive sprockets 21. Each of the two arc-shaped shells 23 has a socket at the end away from the hinge. The U-shaped pin 24 is connected to one of the arc-shaped shells 23 through a flexible connecting band 25, and the U-shaped pin 24 can be inserted into two sockets at the same time to connect the two arc-shaped shells 23.

[0049] In this embodiment, the synchronous locking device 2 consists of two arc-shaped shells 23 joined together to form a ring structure. The two arc-shaped shells 23 are hinged together by one of the main drive sprockets 21. Each of the two arc-shaped shells 23 has a socket at the end furthest from the hinge, the position and size of which match the U-shaped pin 24. The connecting strap 25 is made of plastic and can be bent to prevent the U-shaped pin 24 from falling off after being pulled out, making it more convenient to use. After pulling out the U-shaped pin 24, the two arc-shaped shells 23 can be opened, and the synchronous locking device 2 is secured to the cable through the holes. After closing, it is fixed by the U-shaped pin 24. Moving the synchronous locking device 2 to mate with the panel 111 allows multiple drive wrenches 27 to be inserted into multiple second synchronous drive slots 1521.

[0050] The main drive sprocket 21 corresponds one-to-one with the locking screw 152, and multiple main drive sprockets 21 rotate synchronously through the transmission chain 22. One end of the main drive sprocket 21 extends to the side of the arc-shaped shell 23 away from the main body 1 and forms a third synchronous drive groove 26. The other end extends to the side of the arc-shaped shell 23 close to the main body 1 and is connected to the drive wrench 27. Inside the arc-shaped shell 23, a guide sprocket group 28 corresponding one-to-one with the transmission chain 22 is rotatably arranged. The guide sprocket group 28 includes at least two guide sprockets supported in the middle of the transmission chain 22 and respectively meshing with the opposite sides of the transmission chain 22.

[0051] In this embodiment, multiple main drive sprockets 21 are distributed around the hole, and these main drive sprockets 21 are interconnected by a transmission chain 22. When one of the main drive sprockets 21 rotates, the other main drive sprockets 21 will rotate synchronously through the transmission chain 22, thus ensuring the consistency of the actions of each part of the synchronous locking device 2. By inserting an electric wrench into any of the third synchronous drive slots 26, the transmission chain 22 can drive multiple main drive sprockets 21 to rotate. Since the drive wrench 27 and the third synchronous drive slots 26 are respectively located at both ends of the main drive sprockets 21, inserting the electric wrench into any of the third synchronous drive slots 26 can drive all the main drive sprockets 21 to rotate, thereby enabling all the drive wrenches 27 to rotate. Therefore, multiple drive wrenches 27 inserted into multiple second synchronous drive slots 1521 can drive multiple locking screws 152 to rotate synchronously, causing the positioning claws 158 to extend and tighten the inner wall of the pipe. The third synchronous drive slot 26 is also an internal hexagonal slot, which can be driven by an internal hexagonal wrench.

[0052] Specifically, the number of main drive sprockets 21 and locking screws 152 is the same. Each arc-shaped housing 23 contains two main drive sprockets 21, which rotate synchronously via a transmission chain 22. The main drive sprockets 21 near the hinge point inside the two arc-shaped housings 23 rotate synchronously via the transmission chain 22. One end of each main drive sprocket 21 extends to one side of the arc-shaped housing 23 and is provided with a third synchronous drive groove 26; the other end extends to the other side of the arc-shaped housing 23 and is provided with a drive wrench 27. The main drive sprockets 21 near the hinge point inside the two arc-shaped housings 23 rotate synchronously via the transmission chain 22, and the distance between the two main drive sprockets 21 is fixed, which does not affect the opening and closing actions of the two arc-shaped housings 23. The third synchronous drive groove 26, the second synchronous drive groove 1521, and the first synchronous drive groove 132 have the same structure, and a universal drive wrench 27 is used. The transmission chain 22 is a chain, and the guide sprocket is used to guide the transmission chain 22, avoiding the transmission chain 22 from rubbing against the inner wall of the arc-shaped shell 23, thus ensuring the stability of the transmission process. The main drive sprocket 21 is a double-layer sprocket, which can simultaneously engage two transmission chains 22. The detachable synchronous locking device 2 eliminates the need to carry many synchronous locking devices 2 during on-site assembly. Multiple main bodies 1 can be assembled one by one through a single synchronous locking device 2, making it more convenient to use.

[0053] The diameter of the side of panel 111 facing the synchronous locking device 2 is larger than that of the other side. The side of panel 111 with the larger diameter is provided with a locking mark 17 corresponding to the locking mechanism 15.

[0054] In this embodiment, the larger diameter facing the synchronous locking device 2 provides a more sufficient contact area and space for connection and engagement with the synchronous locking device 2. Furthermore, the locking mark 17 allows users to easily identify the locking screw 152 and the tensioning screw 13, enabling them to quickly locate the area requiring operation, improving work efficiency and reducing misoperation.

[0055] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A cable duct plugging device, characterized in that, The device includes a main body and a synchronous locking device, the synchronous locking device being detachably mounted on one end of the main body. The main body comprises two half-shells, which are joined together to form a cylindrical structure with a cable channel. Each half-shell has a panel, a movable plate, a fixed plate, and a movable tail plate in a direction away from the synchronous locking device. Sealing rings are provided between the movable plate and the fixed plate, and between the fixed plate and the movable tail plate. The main body is provided with a plurality of tensioning screws that pass sequentially from one side of the panel into the movable tail plate. When the tensioning screws rotate circumferentially, they can drive the movable plate and the movable tail plate to simultaneously move closer to or away from the fixed plate to compress or release the sealing rings. The two half-shells are hinged to each other through one of the tensioning screws. The synchronous locking device is provided with a plurality of drive wrenches, which can drive the plurality of tensioning screws to rotate synchronously.

2. The cable duct plugging device according to claim 1, characterized in that, Both the movable plate and the movable tail plate are provided with anti-rotation nut sleeves that are threadedly fitted onto the tensioning screw; the tensioning thread surface is provided with a first thread and a second thread, the first thread cooperating with the anti-rotation nut sleeve in the movable plate to drive the movable plate to move, and the second thread cooperating with the anti-rotation nut sleeve in the movable tail plate to drive the movable tail plate to move, the first thread and the second thread having opposite thread directions; the end of the tensioning screw located inside the panel is provided with a first synchronous drive groove for cooperating with the drive wrench.

3. The cable duct plugging device according to claim 1, characterized in that, The tensioning screw is provided with a first limiting plate that abuts against the side of the panel near the movable plate; the fixed plate is provided with a bearing that is sleeved on the surface of the tensioning screw.

4. The cable duct plugging device according to claim 1, characterized in that, The tensioning screws are configured as four, and the four tensioning screws are arranged in a ring-shaped array with equal spacing along the cylindrical structure formed by the two half-shells.

5. The cable duct plugging device according to claim 1, characterized in that, The sealing ring located between the movable plate and the fixed plate has gaps at both ends, and the sealing ring located between the fixed plate and the movable tail plate has gaps at both ends. At least one ring of waterproof tape covering the gaps at both ends of the sealing ring is adhered to the surface of both sealing rings.

6. The cable duct plugging device according to any one of claims 1-5, characterized in that, The main body is also provided with multiple locking mechanisms. The synchronous locking device can selectively drive multiple locking mechanisms or multiple tension screws to rotate synchronously. The locking mechanism includes a driving cavity and a locking screw for pressing against the inner wall of the pipe. The driving cavity is provided in both the panel and the fixed plate, and the driving cavities in the two are arranged opposite to each other. The end of the locking screw passes through two opposite driving cavities from one side of the panel and penetrates into the movable tail plate. A second limiting plate is fixedly provided on the locking screw, abutting against the side of the panel near the movable plate.

7. The cable duct plugging device according to claim 6, characterized in that, The locking screw has a threaded section and a smooth section on its surface. The threaded section is formed on the part of the locking screw located inside the drive cavity, and the remaining part of the locking screw is the smooth section. The drive cavity is provided with a slider, a drive block, and a spring. The slider has a clearance hole for the locking screw to pass through. One side of the slider is inclined. The locking screw is threaded with a drive block located inside the drive cavity. The drive block has an inclined side opposite the inclined side of the slider, and the two inclined sides abut against each other. The width of the drive block and the slider matches the width of the drive cavity. One side of the drive cavity has an opening communicating with the outside, and a sealing ring is embedded in the opening. The slider has a positioning claw extending into the opening. The spring abuts between the slider and the inner wall of the drive cavity, and the spring and the positioning claw are on the same side. The end of the locking screw located inside the panel has a second synchronous drive groove for cooperating with the drive wrench.

8. The cable duct plugging device according to claim 6, characterized in that, The synchronous locking device is provided with holes that allow cables to pass through and main drive sprockets distributed around the holes. Multiple main drive sprockets rotate synchronously through a transmission chain. The synchronous locking device includes a U-shaped pin and two arc-shaped shells. The two arc-shaped shells are joined together to form a ring structure and are hinged to each other through one of the main drive sprockets. Each of the two arc-shaped shells has a insertion hole at the end away from the hinge. The U-shaped pin is connected to one of the arc-shaped shells through a flexible connecting band, and the U-shaped pin can be inserted into both insertion holes at the same time to connect the two arc-shaped shells.

9. The cable duct plugging device according to claim 8, characterized in that, The main drive sprockets correspond one-to-one with the locking screws, and multiple main drive sprockets rotate synchronously through a transmission chain. One end of each main drive sprocket extends to the side of the arc-shaped shell away from the main body and forms a third synchronous drive groove, while the other end extends to the side of the arc-shaped shell close to the main body and is connected to the drive wrench. Inside the arc-shaped shell, a guide sprocket set corresponding one-to-one with the transmission chain is rotatably arranged. The guide sprocket set includes at least two guide sprockets supported in the middle of the transmission chain and respectively meshing with the opposite sides of the transmission chain.

10. The cable duct plugging device according to claim 6, characterized in that, The diameter of the panel facing the synchronous locking device is larger than that of the other side, and the side with the larger diameter of the panel is provided with a locking mark corresponding to the locking mechanism.

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