A clamping type cable conduit plugging device and its use method

Abstract

The present invention provides a clamping type cable duct sealing device and a use method thereof, which belongs to the technical field of cable duct sealing and aims to solve the problems of unstable installation and insufficient airtightness of the sealing device. The device comprises an upper sealing ring and a lower sealing ring, a plurality of bolts are passed through the upper sealing ring and the lower sealing ring, a sealing piece is clamped between the upper sealing ring and the lower sealing ring, the longitudinal cross-section of the sealing piece is "n"-shaped, the internal gap of the sealing piece gradually decreases from the middle end to both sides, and a plurality of bolts pass through the inside of the sealing piece; the lower sealing ring is connected with a clamping assembly, the clamping assembly comprises a fixed ring plate and a movable ring plate, the fixed ring plate is fixedly connected to the lower sealing ring, a plurality of movable grooves are provided on the fixed ring plate, the length direction of the movable grooves points to the center of the fixed ring plate, the movable ring plate is provided with a belt groove corresponding to the movable groove, the belt groove is inclined, a movable rod is passed through between the movable ring plate and the movable groove, a locking block sleeved on the movable rod is provided between the movable ring plate and the fixed ring plate, and a locking mechanism is provided between each locking block.

Description

Technical Field

[0001] The present invention belongs to the technical field of cable conduit sealing, and more specifically, relates to a clamping type cable conduit sealing device and a method for using the same. Background Art

[0002] In urban construction, underground power and communications pipelines are installed in pre-dug trenches, with cables routed through these ducts for connection. During the construction of these ducts, artificial wells are set up at standard intervals to serve as workstations for wiring, inspection, repairs, and maintenance. The wells are constructed of bricks and cement, and each well is connected by pre-buried pipes. If the pipelines are not properly waterproofed and sealed, over time, water seepage, accumulation of water, sediment, and rats can occur within the pipelines, compromising the safety and maintenance of the cables themselves. In severe cases, they can even cause power outages or signal interruptions. Therefore, sealing is essential.

[0003] In the cable pipe sealing technology, traditional curing sealing technologies such as fireproof mud, cement, foam, and sealing plugs are mainly used. However, in order to make installation more convenient, quick, and sealing longer-lasting, most people now use a sealing device. The general sealing device uses a rubber sealing piece. By placing the front of the sealing device into the pipe, the front and rear ends simultaneously squeeze the rubber sealing piece, so that it is subjected to force and expands inside and outside to fill the cross-section of the cable pipe for sealing. This method makes it impossible for the outer end of the sealing device to fit tightly against the outer wall of the pipe. The front and rear ends of the sealing device will be suspended in the air, so that there will be a gap between the sealing device and the wall, and water can enter the pipe mouth. At this time, using rubber to isolate water can prevent water from continuing to penetrate into the pipe, but it cannot prevent water from further eroding the sealing device, resulting in a insufficient service life of the sealing device. The front and rear ends of the sealing device will be suspended in the air, resulting in unstable installation and easily affected sealing. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a clamping type cable pipe sealing device and a method for using the same, so as to solve the problem that when the sealing device is installed, its front and rear ends will be suspended in the air, resulting in a gap between the sealing device and the wall, and water can enter the pipe mouth. At this time, the use of rubber to isolate water can prevent water from continuing to penetrate into the pipe, but cannot prevent water from further eroding the sealing device, resulting in a short service life of the sealing device. The front and rear ends of the sealing device will be suspended in the air, resulting in unstable installation and easily affected sealing.

[0005] The purpose and effect of the clamping cable duct plugging device of the present invention are achieved by the following specific technical means:

[0006] A clamping cable duct sealing device and its use method, comprising an upper sealing ring and a lower sealing ring; the upper sealing ring and the lower sealing ring are both detachably spliced ​​together by two groups of oppositely arranged semicircular rings, a plurality of bolts are passed through the upper sealing ring and the lower sealing ring, the top surface of the upper sealing ring extends outward, and the top surface diameter thereof is larger than the diameter of the lower sealing ring; an annular sealing piece is clamped between the upper sealing ring and the lower sealing ring, the longitudinal cross-section of the sealing piece is "n"-shaped, and the internal gap thereof gradually decreases from the middle end to both sides, and a plurality of the bolts pass through the inside of the sealing piece; the bottom end of the lower sealing ring is connected to the clamping assembly, and the clamping assembly comprises a fixed ring plate and a movable ring plate, and the fixed ring plate and the movable ring plate They are both composed of two semicircular arc plates, the fixed ring plates are respectively fixedly connected to the corresponding lower sealing rings, a plurality of movable grooves are distributed in an array on the fixed ring plate, the length direction of the movable grooves points to the center of the fixed ring plate, and band grooves corresponding to the movable grooves are distributed in an array on the movable ring plate, and the length direction of the band grooves is inclined, and the position close to the inner circle of the movable ring plate is just connected with the movable groove up and down, a movable rod is passed through the position where the movable ring plate is connected with the movable groove, and a locking block sleeved on the movable rod is provided between the movable ring plate and the fixed ring plate. Rotating the movable ring plate can make the movable rod drive the locking block to extend outward to form a flange, and a locking mechanism is provided between each of the locking blocks.

[0007] Furthermore, the locking mechanism includes a bevel rack plate, which is arranged at the bottom end of the fixed ring plate, and a mounting shell corresponding to the bevel rack plate is provided on the movable ring plate. A sliding card in the mounting shell is provided with a positioning tooth, and the bottom end of the positioning tooth is connected to the bottom surface of the mounting shell through a reset spring.

[0008] Furthermore, it also includes a special tool for use with the clamping cable pipe sealing device, the special tool includes two half sleeves, the two half sleeves can be spliced ​​into a circular sleeve, the top of the half sleeve is provided with a button ring, a splicing joint for mutual connection is provided between the two button rings, the inner side of the movable ring plate is provided with a convex petal, and the bottom end of the half sleeve is provided with a transmission notch corresponding to the convex petal.

[0009] Furthermore, a guide strip corresponding to the locking block is provided at the bottom end of the fixed ring plate.

[0010] Furthermore, a conical sealing strip close to the bottom of the flange is provided on the circumferential side of the upper sealing ring, and a locking button is provided on the bottom surface of the upper sealing ring flange, and the locking button is locked in the corresponding groove on the conical sealing strip.

[0011] Furthermore, the conical sealing strip surrounds the upper sealing ring, and the notch thereof is connected by a snap fastener. The longitudinal cross-section of the conical sealing strip is triangular, with its hypotenuse facing downwardly outwardly of the upper sealing ring.

[0012] Furthermore, a mounting groove is provided in an annular shape at the top of the lower sealing ring, a mounting strip is provided in an annular shape at the bottom end of the sealing member, the mounting strip is clamped in the mounting groove, a positioning groove is provided at the top of the sealing member, and a corresponding protrusion at the bottom end of the upper sealing ring is clamped in the positioning groove.

[0013] In addition, the present invention also provides a method of using the above-mentioned clamping cable duct sealing device, comprising the following steps:

[0014] 1) Place the plugging piece on the cable, then buckle the lower and upper sealing rings on the cable and place them at the front and rear ends of the plugging piece respectively. Then, snap the corresponding positioning groove of the plugging piece onto the bottom of the upper sealing ring. Use bolts to penetrate the plugging piece from the upper sealing ring and connect the upper and lower sealing rings.

[0015] 2) Place the connected upper sealing ring, plugging piece and lower sealing ring into the pipe to be sealed, with the upper sealing ring placed outside the pipe opening. Then, snap the two half sleeves of the special tool onto the cable to form a circular sleeve, and extend it into the pipe from the middle of the plugging device. When the bottom of the half sleeve abuts against the convex petal of the inner ring of the movable ring plate, rotate and adjust the circular sleeve appropriately so that the transmission notch at the bottom of the half sleeve is just stuck in the convex petal. At this time, rotate the circular sleeve so that the movable ring plate rotates accordingly, thereby driving the locking block to extend outward and clamp it to the inner wall of the pipe, completing the positioning of the lower sealing ring.

[0016] 3) Take out the special tool and turn the bolt to move the upper sealing ring into the pipe. After the upper sealing ring presses against the outer wall of the pipe, the position of the upper sealing ring remains unchanged. Continue to turn the bolt. Since the upper sealing ring presses against the outer wall, its locking force is greater than the locking force of the clamping assembly on the lower sealing ring, causing the lower sealing ring to move toward the upper sealing ring, thereby squeezing the sealing piece to expand and fill the pipe until the bolt is tightened.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The cam is then tightened to allow the locking member to be pushed outwards and the locking member to be pushed back into the pipe, whereupon the locking member is forced back outwards and outwards to engage the pipe, whereupon the locking member is forced back outwards and the pipe is engaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a stereoscopic diagram of a clamping type cable conduit sealing device of the present invention.

[0020] Figure 2 It is an exploded view of a clamping type cable conduit sealing device of the present invention.

[0021] Figure 3 yes Figure 2 Magnified view of area A in center.

[0022] Figure 4 It is a side view of a clamping cable conduit sealing device of the present invention.

[0023] Figure 5 yes Figure 4 Cross-sectional view at AA in the middle.

[0024] Figure 6 yes Figure 5 Magnified view of area B.

[0025] Figure 7 It is a structural schematic diagram of the clamping assembly in the present invention.

[0026] Figure 8 yes Figure 7 Supine side view.

[0027] Figure 9 It is a cross-sectional view of the blocking member in the present invention.

[0028] Figure 10 It is a structural diagram of the special tool in the present invention.

[0029] Figure 11 It is an exploded view of the special tool in the present invention.

[0030] In the figure, the corresponding relationship between the component names and the drawing numbers is as follows:

[0031] 1. Upper sealing ring; 2. Lower sealing ring; 3. Sealing piece; 4. Fixed ring plate; 5. Movable ring plate; 6. Conical sealing strip; 7. Bolt; 8. Movable rod; 9. Locking block; 10. Lobe; 11. Nut; 12. Movable groove; 13. Belt groove; 14. Bevel rack; 15. Mounting shell; 16. Return spring; 17. Positioning tooth; 18. Guide strip; 19. Mounting groove; 20. Mounting strip; 21. Positioning groove; 22. Button; 23. Half sleeve; 24. Button ring; 25. Transmission notch; 26. Splicing joint; 27. Buckle. DETAILED DESCRIPTION

[0032] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0033] In the description of the present invention, unless otherwise specified, "plurality" means two or more; terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0035] Example:

[0036] As attached Figure 1 To the attached Figure 11 As shown:

[0037] The present invention provides a clamping cable conduit plugging device, comprising an upper sealing ring 1 and a lower sealing ring 2; the upper sealing ring 1 and the lower sealing ring 2 are both detachably spliced ​​together by two groups of oppositely arranged semicircular rings; a plurality of bolts 7 are passed between the upper sealing ring 1 and the lower sealing ring 2; a nut 11 is clamped at the bolt hole at the bottom of the lower sealing ring 2; the bolts 7 are threadedly connected with the corresponding nuts 11; tightening the bolts 7 can bring the upper sealing ring 1 and the lower sealing ring 2 closer to each other; the top surface of the upper sealing ring 1 extends outward to form a flange, the top surface diameter of which is larger than the diameter of the lower sealing ring 2; when installing the patent, the upper sealing ring 1 is placed outside the conduit port, the top surface diameter of the upper sealing ring 1 is larger than the conduit diameter, and the outer wall diameter of the lower sealing ring 2 and the outer wall diameter of the inner ring of the upper sealing ring 1 are smaller than the conduit diameter;

[0038] Among them, a ring-shaped sealing member 3 is provided between the upper sealing ring 1 and the lower sealing ring 2. Figure 5 、 Figure 9 As shown, the longitudinal cross-section of the sealing member 3 is "n"-shaped, and the internal gap thereof gradually decreases from the middle end to both sides. A plurality of bolts 7 pass through the inside of the sealing member 3. The sealing member 3 is made of rubber. When the top and bottom ends of the sealing member 3 are squeezed, due to the internal structure of the cross-section, the outer side is subjected to an outward horizontal component of force, and the inner side is subjected to an inward horizontal component of force, so that the sealing member 3 expands to both sides when squeezed, thereby filling and sealing the gap between the cable duct and the cable.

[0039] Among them, combined Figures 1 to 8 As shown, the bottom end of the lower sealing ring 2 is connected to the clamping assembly, and the clamping assembly includes a fixed ring plate 4 and a movable ring plate 5. The fixed ring plate 4 and the movable ring plate 5 are composed of two semicircular arc plates. The fixed ring plate 4 is fixedly connected to the corresponding lower sealing ring 2. The fixed ring plate 4 can be disassembled or installed on the cable following the lower sealing ring 2. A plurality of movable grooves 12 are distributed in an array on the fixed ring plate 4. The length direction of the movable groove 12 points to the center of the fixed ring plate 4. The movable ring plate 5 is distributed in an array with a belt groove 13 corresponding to the movable groove 12. The length of the belt groove 13 is The movable ring plate 5 is tilted in the direction, and its position close to the inner circle of the movable ring plate 5 is just connected with the movable groove 12 in the upper and lower directions. A movable rod 8 is passed through the position where the movable ring plate 5 is connected with the movable groove 12. The movable rod 8 is used to connect the movable ring plate 5 and the fixed ring plate 4. The arrangement of the belt groove 13 makes it possible for the movable rod 8 to be subjected to a thrust tangential to the circumferential direction when the movable ring plate 5 rotates. The inclined belt groove 13 makes the movable rod 8 subjected to a component of force perpendicular to the circumferential direction, so that it gradually moves toward the outer circle, thereby causing the movable rod 8 to move outward in the movable groove 12;

[0040] A locking block 9 sleeved on the movable rod 8 is provided between the movable ring plate 5 and the fixed ring plate 4. Rotating the movable ring plate 5 can make the movable rod 8 drive the locking block 9 to extend outward. After the movable rod 8 drives the locking block 9 to extend outward, the locking block 9 abuts against the inner wall of the pipe, thereby positioning the lower sealing ring 2.

[0041] Among them, a locking mechanism is provided between each locking block 9, and the locking mechanism includes a bevel rack plate 14, which is provided at the bottom end of the fixed ring plate 4, and a mounting shell 15 corresponding to the bevel rack plate 14 is provided on the movable ring plate 5. A positioning tooth 17 is provided in the sliding card inside the mounting shell 15, and the bottom end of the positioning tooth 17 is connected to the inner bottom surface of the mounting shell 15 by a reset spring 16. When the movable ring plate 5 rotates, the tooth bevel of the bevel rack plate 14 pushes the positioning tooth 17, so that the positioning tooth 17 moves downward, and whenever the positioning tooth 17 moves between the tooth gaps of the bevel rack plate 14, the reset spring 16 causes the positioning tooth 17 to bounce up and get stuck between the tooth gaps, thereby making it impossible to rotate the movable ring plate 5 to achieve positioning.

[0042] Among them, also include special tools used corresponding to the clamping type cable duct sealing device, such as Figure 10 and 11As shown, the special tool includes two half sleeves 23, and the two half sleeves 23 can be spliced ​​into a circular sleeve. The circular sleeve is just smaller than the inner diameter of the sealing device and can be inserted from the middle of the sealing device. A button ring 24 is provided on the top of the half sleeve 23, and a splicing joint 26 for mutual connection is provided between the two button rings 24. The button ring 24 is convenient for the user to rotate the special tool, and the splicing joint 26 can accurately position the two half sleeves 23 when they are buckled together. A convex petal 10 is provided on the inner side of the movable ring plate 5, and a transmission notch 25 corresponding to the convex petal 10 is provided at the bottom end of the half sleeve 23. After the lower sealing ring 2 and the sealing member 3 are deeply inserted into the pipeline, the upper sealing ring 1 remains at the pipeline mouth, and the special tool is used to penetrate into the sealing device so that the transmission notch 25 at the bottom of the special tool is just buckled in the convex petal 10. The button ring 24 can be rotated to drive the movable ring plate 5 in the clamping assembly to rotate.

[0043] Among them, combined again Figure 2 and Figure 3 A guide strip 18 corresponding to the locking block 9 is provided at the bottom end of the fixed ring plate 4 , and the guide strip 18 can guide the position of the extended locking block 9 .

[0044] Among them, a conical sealing strip 6 is provided on the circumference of the upper sealing ring 1, which is close to the bottom of the flange. The setting of the conical sealing strip 6 enables the outer end face of the upper sealing ring 1 to be against the pipe opening. The conical sealing strip 6 can be applied to pipe openings of different sizes to block and seal them. The bottom surface of the flange of the upper sealing ring 1 is provided with a card button 22, which is carded in the corresponding groove on the conical sealing strip 6. The setting of the card button 22 makes it convenient to disassemble and assemble the conical sealing strip 6 from the upper sealing ring 1.

[0045] Among them, the conical sealing strip 6 surrounds the upper sealing ring 1, and its notch is connected by a buckle 27. The longitudinal cross-section of the conical sealing strip 6 is triangular, and its hypotenuse faces the outer side and lower side of the upper sealing ring 1. The two right-angled surfaces of the conical sealing strip 6 can be tightly attached to the upper sealing ring 1, and the setting of the buckle 27 facilitates the removal of the conical sealing strip 6.

[0046] Among them, a mounting groove 19 is provided in an annular manner at the top end of the lower sealing ring 2, and a mounting strip 20 is provided in an annular manner at the bottom end of the sealing member 3. The mounting strip 20 is clamped in the mounting groove 19, and a positioning groove 21 is provided at the top of the sealing member 3. The corresponding protrusion at the bottom end of the upper sealing ring 1 is clamped in the positioning groove 21. The positioning groove 21 can position and install the sealing member 3. Through the setting of the mounting groove 19, the sealing member 3 is conveniently clamped and installed between the upper sealing ring 1 and the lower sealing ring 2.

[0047] The specific usage and function of this embodiment are as follows:

[0048] When the present invention is used, the blocking piece 3 is wrapped around the cable, and then the lower sealing ring 2 and the upper sealing ring 1 are buckled on the cable and placed at the front and rear ends of the blocking piece 3 respectively. Then, the blocking piece 3 is clamped at the bottom of the upper sealing ring 1 corresponding to the positioning groove 21, and the bolt 7 is used to penetrate the blocking piece 3 from the upper sealing ring 1 and connect the upper sealing ring 1 and the lower sealing ring 2;

[0049] Put the connected upper sealing ring 1, the sealing piece 3 and the lower sealing ring 2 into the pipe to be sealed, and place the upper sealing ring 1 outside the pipe opening. Then, buckle the two half sleeves 23 of the special tool on the cable to form a circular sleeve, and extend it into the pipe from the middle of the sealing device. When the bottom of the half sleeve 23 abuts against the convex petal 10 of the inner ring of the movable ring plate 5, rotate and adjust the circular sleeve appropriately so that the transmission notch 25 at the bottom of the half sleeve 23 is just stuck in the convex petal 10. At this time, rotate the circular sleeve so that the movable ring plate 5 rotates accordingly, thereby driving the locking block 9 to extend outward and clamp it on the inner wall of the pipe, completing the positioning of the lower sealing ring 2.

[0050] Take out the special tool and turn the bolt 7 to move the upper sealing ring 1 into the pipe. After the upper sealing ring 1 presses against the outer wall of the pipe, the position of the upper sealing ring 1 remains unchanged. Continue to turn the bolt 7. Since the upper sealing ring 1 presses against the outer wall, its locking force is greater than the locking force of the clamping assembly on the lower sealing ring 2 (the friction force of the locking block 9 against the inner wall of the pipe is low), causing the lower sealing ring 2 to move toward the upper sealing ring 1, thereby squeezing the sealing piece 3 to expand and fill the pipe until the bolt 7 is tightened.

[0051] This method enables the sealing device to be compactly installed at the cable duct opening, with the upper sealing ring 1 tightly against the duct opening and the sealing member 3 filling the duct for double sealing, greatly improving the sealing performance and stability after installation.

[0052] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. A clamping cable duct plugging device, characterized by: It comprises an upper sealing ring (1) and a lower sealing ring (2); the upper sealing ring (1) and the lower sealing ring (2) are both detachably connected together by two groups of semicircular rings arranged opposite to each other, a plurality of bolts (7) are passed through between the upper sealing ring (1) and the lower sealing ring (2), the top surface of the upper sealing ring (1) extends outward to form a flange, and the diameter of the top surface is larger than the diameter of the lower sealing ring (2); A sealing member (3); an annular sealing member (3) is provided between the upper sealing ring (1) and the lower sealing ring (2); the sealing member (3) has an "n"-shaped longitudinal cross-section, and its internal space gradually decreases from the middle end to both sides; a plurality of bolts (7) pass through the interior of the sealing member (3); Clamping assembly; the bottom end of the lower sealing ring (2) is connected to the clamping assembly, and the clamping assembly includes a fixed ring plate (4) and a movable ring plate (5), and the fixed ring plate (4) and the movable ring plate (5) are both composed of two semicircular arc plates, and the fixed ring plate (4) is fixedly connected to the corresponding lower sealing ring (2), and a plurality of movable grooves (12) are distributed in an array on the fixed ring plate (4), and the length direction of the movable groove (12) points to the center of the fixed ring plate (4), and the movable ring plate (5) is distributed in an array corresponding to the movable groove (12). A belt groove (13) is provided, wherein the belt groove (13) is inclined in the longitudinal direction, and its position close to the inner circle of the movable ring plate (5) is just connected with the movable groove (12) in the upper and lower directions. A movable rod (8) is provided between the position where the movable ring plate (5) is connected with the movable groove (12), and a locking block (9) sleeved on the movable rod (8) is provided between the movable ring plate (5) and the fixed ring plate (4). Rotating the movable ring plate (5) can make the movable rod (8) drive the locking block (9) to extend outward, and a locking mechanism is provided between each of the locking blocks (9).

2. The clamping cable duct sealing device according to claim 1, characterized in that: The locking mechanism includes an oblique rack plate (14), the oblique rack plate (14) is arranged at the bottom end of the fixed ring plate (4), and a mounting shell (15) corresponding to the oblique rack plate (14) is provided on the movable ring plate (5), and a positioning tooth (17) is provided on the sliding card inside the mounting shell (15), and the bottom end of the positioning tooth (17) is connected to the inner bottom surface of the mounting shell (15) through a return spring (16).

3. The clamping cable duct sealing device according to claim 1, characterized in that: The invention also includes a special tool for use with the clamping cable conduit plugging device, the special tool including two half sleeves (23), the two half sleeves (23) can be spliced ​​into a circular sleeve, the top of the half sleeve (23) is provided with a button ring (24), a splicing joint (26) for mutual connection is provided between the two button rings (24), the inner side of the movable ring plate (5) is provided with a convex petal (10), and the bottom end of the half sleeve (23) is provided with a transmission notch (25) corresponding to the convex petal (10).

4. The clamping cable duct sealing device according to claim 1, characterized in that: A guide strip (18) corresponding to the locking block (9) is provided at the bottom end of the fixed ring plate (4).

5. The clamping cable duct sealing device according to claim 1, characterized in that: A conical sealing strip (6) is provided on the circumferential side of the upper sealing ring (1) and is in close contact with the bottom of the flange. A clamping button (22) is provided on the bottom surface of the flange of the upper sealing ring (1). The clamping button (22) is clamped in a corresponding groove on the conical sealing strip (6).

6. The clamping cable duct sealing device according to claim 5, characterized in that: The conical sealing strip (6) surrounds the upper sealing ring (1), and the notch thereof is connected via a buckle (27). The conical sealing strip (6) has a triangular longitudinal cross-section, with its hypotenuse facing downwardly and outwardly of the upper sealing ring (1).

7. The clamping cable duct sealing device according to claim 3, characterized in that: The top end of the lower sealing ring (2) is provided with a mounting groove (19) in an annular shape, the bottom end of the blocking member (3) is provided with a mounting strip (20) in an annular shape, the mounting strip (20) is clamped in the mounting groove (19), the top end of the blocking member (3) is provided with a positioning groove (21), and the corresponding protrusion at the bottom end of the upper sealing ring (1) is clamped in the positioning groove (21).

8. The method for using the clamping cable duct sealing device according to claim 7, comprising the following steps: 1) Sleeve the plugging member (3) on the cable, then buckle the lower sealing ring (2) and the upper sealing ring (1) on the cable and place them at the front and rear ends of the plugging member (3) respectively, then clamp the corresponding positioning groove (21) of the plugging member (3) at the bottom of the upper sealing ring (1), and use the bolt (7) to penetrate the plugging member (3) from the upper sealing ring (1) and connect the upper sealing ring (1) and the lower sealing ring (2); 2) Place the connected upper sealing ring (1), the sealing member (3) and the lower sealing ring (2) into the pipe to be sealed, and place the upper sealing ring (1) outside the pipe opening. Then, fasten the two half sleeves (23) of the special tool on the cable to form a circular sleeve, and extend it into the pipe from the middle of the sealing device. When the bottom of the half sleeve (23) abuts against the convex petal (10) of the inner ring of the movable ring plate (5), rotate and adjust the circular sleeve appropriately so that the transmission notch (25) at the bottom of the half sleeve (23) is just stuck in the convex petal (10). At this time, rotate the circular sleeve so that the movable ring plate (5) rotates accordingly, thereby driving the locking block (9) to extend outward so that it is clamped on the inner wall of the pipe, completing the positioning of the lower sealing ring (2); 3) Take out the special tool and turn the bolt (7) to move the upper sealing ring (1) into the pipe. After the upper sealing ring (1) contacts the outer wall of the pipe, the position of the upper sealing ring (1) remains unchanged. Continue to turn the bolt (7). Since the upper sealing ring (2) contacts the outer wall, its locking force is greater than the locking force of the clamping assembly on the lower sealing ring (2), causing the lower sealing ring (2) to move toward the upper sealing ring (1), thereby squeezing the sealing member to expand and fill the pipe until the bolt (7) is tightened.

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