A cable conduit sealing device

Abstract

This invention relates to the field of cable duct sealing technology, and in particular to a cable duct sealing device, comprising several rubber blocks, the outer walls of which, together with the inner wall of the duct, form a circle. Each rubber block is equipped with an adjusting component for adjusting its inner and outer diameters. The inner walls of the rubber blocks together form at least one receiving cavity. A mandrel is coaxially arranged within the receiving cavity. A sealing component is disposed between the mandrel and the inner wall of the receiving cavity. By providing an adjusting component on each rubber block, the inner and outer diameters of a single rubber block can be adjusted, solving the problem of limited adaptability of existing devices to non-standard diameter ducts and adapting to more duct specifications.

Description

Technical Field

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

[0002] In power transmission systems, the sealing performance of cable ducts directly determines the safety and service life of cables. Cables are often laid in damp, muddy outdoor cable trenches or underground pipe networks. If the seal is not tight, moisture and debris can easily penetrate into the duct, causing corrosion of the cable insulation and rust of the metal sheath, which can lead to short circuits and leakage faults. Therefore, developing cable duct sealing devices with strong adaptability and reliable sealing is a core requirement for the industry to ensure stable power supply.

[0003] In the prior art, CN218732919U discloses a flexible flange-type cable duct sealing device, which adopts a structure in which a limiting part and a fixing part cooperate: the limiting part is composed of a first and a second flexible rubber block, the inner side of the rubber block is provided with a through groove and an air bladder is built in, and the surface protrusion and groove are engaged to achieve splicing; the fixing part includes a first and a second pressure plate and bolts and nuts. By squeezing the limiting part, the rubber block expands to seal the pipe, and at the same time, the air bladder is inflated to fix cables of different sizes, without the need for cutting holes, reducing construction waste and time, which is an improvement over the traditional fixed size sealing ring.

[0004] However, the device still has significant shortcomings: First, it lacks an independent adjustment component for each individual rubber block, making it impossible to precisely adjust the inner and outer diameters of the rubber blocks and limiting its compatibility with non-standard diameter pipes; Second, the seal is highly dependent on the airbag, and if the airbag ruptures, the seal will fail, and there is no coaxial mandrel or matching sealing components, making it easy for cable displacement to create sealing gaps; Third, it is difficult to adapt to the sealing requirements of multiple cables in layers, and cannot fully meet the diverse sealing scenarios in actual construction, which urgently needs further optimization. Summary of the Invention

[0005] To address the problem of the lack of an independent adjustment component for individual rubber blocks, which makes it impossible to accurately adjust the inner and outer diameters of the rubber blocks and limits their compatibility with non-standard diameter pipes, this invention provides a cable pipe sealing device.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows: A cable duct sealing device includes several rubber blocks, the outer walls of which, together with the inner wall of the duct, form a circle. Each rubber block is equipped with an adjustment component for adjusting its inner and outer diameters. The inner walls of the rubber blocks together form at least one accommodating cavity. A mandrel is coaxially arranged within the accommodating cavity. A sealing component is disposed between the mandrel and the inner wall of the accommodating cavity. This cable duct sealing device, by providing an adjustment component on each rubber block, allows for adjustment of the inner and outer diameters of a single rubber block, solving the problem of limited compatibility with non-standard diameter ducts in existing devices and adapting to more duct specifications. In use, the mandrel is removed to replace the cable, and in conjunction with the sealing component, cable displacement prevents gaps and improves sealing stability. Furthermore, the inner walls of the rubber blocks can enclose at least one accommodating cavity, meeting the requirements for layered sealing of multiple cables. Overall, it balances sealing reliability and scenario adaptability, effectively addressing the shortcomings of the prior art.

[0007] Preferably, the rubber block is in the shape of a semi-circular ring. The semi-circular shape of the rubber block facilitates quick assembly into a complete ring, improving installation convenience and ensuring stable adhesion to the inner wall of the pipe.

[0008] Preferably, the sealing assembly includes a second rubber block; the second rubber block is cylindrical in shape; the outer wall of the second rubber block fits into the inner wall of the first rubber block; the inner wall of the second rubber block fits into the outer wall of the mandrel. The sealing assembly uses a cylindrical second rubber block, whose outer wall tightly fits the inner wall of the first rubber block, and whose inner wall tightly fits the outer wall of the mandrel, forming a double sealing interface. This not only compensates for assembly gaps through the elasticity of the rubber, but also enhances the sealing reliability between the cable replacing the mandrel and the first rubber block, effectively preventing the intrusion of moisture and impurities.

[0009] Preferably, the sealing assembly further includes several semi-circular grooves I fixedly formed on the inner wall of the rubber block II; the semi-circular grooves I are evenly arranged along the circumference; and several semi-circular grooves II are evenly arranged along the circumference on the outer wall of the mandrel in conjunction with the semi-circular grooves I. The sealing assembly has evenly arranged semi-circular grooves I and II on the inner wall of the rubber block II and the outer wall of the mandrel, respectively. Each branch of the cable is placed within the space formed by these two grooves, which not only positions the branch wires, preventing multiple branch wires from becoming tangled, but also increases the sealing contact area through the tight fit between the groove walls and the branch wires, filling the tiny gaps between the branch wires and the sealing assembly. Simultaneously, the evenly distributed semi-circular grooves I and II restrict the circumferential displacement of the branch wires, preventing them from shaking and causing seal failure, further improving the sealing reliability at each branch of the cable, and effectively preventing the intrusion of moisture and impurities.

[0010] Preferably, the sealing assembly includes several coaxially arranged sealing gaskets; the inner diameter of the sealing gaskets gradually increases, and they are sequentially nested together; each sealing gasket includes two semi-circular ring gaskets. The sealing assembly employs several coaxial sealing gaskets with gradually changing inner diameters, and each sealing gasket has a structure of two semi-circular ring gaskets: this allows for flexible adaptation to cables of different diameters through the gradually changing inner diameter characteristic, eliminating the need to replace the entire sealing assembly; the opening and closing design of the semi-circular ring gaskets allows for quick installation without disassembling the cable, greatly simplifying the operation process; simultaneously, the multi-layered structure forms multiple sealing interfaces, blocking gaps layer by layer, further improving sealing reliability and effectively preventing the intrusion of moisture and impurities.

[0011] Preferably, the adjustment assembly includes adjustment units that are configured to cooperate with the rubber block; each adjustment unit includes two semi-circular ring plates; the two semi-circular ring plates are respectively disposed on the front and rear sides of the rubber block; the two semi-circular ring plates are connected by several bolts; the bolts are axially inserted through the rubber block. By setting two semi-circular ring plates on the front and rear sides of the rubber block and connecting them with bolts axially inserted through the rubber block, the adjustment assembly can achieve stable adjustment of the inner and outer diameters of the rubber block by tightening the bolts to compress it, thus adapting to pipes and cables of different specifications; at the same time, the annular structure of the semi-circular ring plates can make the rubber block bear force evenly, avoiding excessive local deformation that could lead to sealing failure; and the through-type connection of the bolts can lock the adjusted size, preventing loosening during long-term use, thus balancing adjustment accuracy and structural stability.

[0012] Preferably, the semicircular ring plate and the rubber block are coaxially arranged, and the semicircular ring plate and the rubber block are staggered in the circumferential direction. The coaxial arrangement of the semicircular ring plate and the rubber block ensures that the rubber block deforms uniformly along the center of the pipe during adjustment, avoiding sealing gaps caused by eccentricity; the staggered arrangement in the circumferential direction allows the pressure of the semicircular ring plate to cover the gaps of the rubber block, preventing uneven adjustment caused by insufficient local force; the combination of the two arrangements not only improves the accuracy of adjusting the inner and outer diameters of the rubber block, but also ensures the stability of the fit between the rubber block and the pipe / cable after adjustment, further enhancing the sealing effect.

[0013] Preferably, the cross-section of the rubber block is fan-shaped; three rubber blocks are provided; a semi-circular groove is formed on each radial side of the rubber block; the semi-circular grooves of two adjacent rubber blocks form a receiving cavity. The structure of three rubber blocks with fan-shaped cross-sections allows for stable assembly into a circle that fits the inner wall of the pipe through three-point splicing, ensuring overall fit stability; it also allows for precise adaptation to the laying needs of multiple cables by splicing the semi-circular grooves of each radial side with the semi-circular grooves of adjacent rubber blocks, achieving independent positioning and separation of cables and preventing entanglement; simultaneously, the fan-shaped splicing surface and the groove interlocking structure reduce splicing gaps, further improving overall sealing performance and effectively preventing the intrusion of moisture and impurities.

[0014] Preferably, the sealing assembly includes several coaxially arranged sealing gaskets; the inner diameter of the sealing gaskets gradually increases, and they are sequentially nested; each sealing gasket includes two semi-circular ring gaskets. The sealing assembly employs several coaxial sealing gaskets with gradually changing inner diameters, and each sealing gasket has a structure of two semi-circular ring gaskets: the opening and closing design of the semi-circular ring gaskets allows for quick installation without disassembling the cable, greatly simplifying the construction process; the gradually changing inner diameter allows for flexible adaptation to cables of different diameters, eliminating the need to replace the entire sealing assembly and reducing adaptation costs; simultaneously, the multi-layered structure forms multiple sealing interfaces, blocking gaps layer by layer, effectively improving sealing reliability and preventing the intrusion of moisture and impurities.

[0015] Preferably, the adjustment assembly includes adjustment units that are configured to cooperate with the rubber block 1; each adjustment unit includes two cover plates; the two cover plates are respectively disposed on the front and rear sides of the rubber block 1; the two cover plates are connected by a plurality of bolts 2; the bolts 2 are axially inserted through the rubber block 1. By providing two cover plates on the front and rear sides of the rubber block 1 and connecting them with axially inserted bolts 2, the adjustment assembly can: 1) precisely compress the rubber block 1 by tightening the bolts 2, stably adjust its inner and outer diameter, and flexibly adapt to pipes and cables of different specifications; 2) make the rubber block 1 more evenly stressed by the full coverage of the cover plates, avoiding excessive local deformation that could lead to sealing gaps; and 3) lock the adjusted size by the through connection of the bolts 2, preventing loosening during long-term use, further enhancing sealing stability, and effectively ensuring the overall sealing effect.

[0016] As can be seen from the above technical solutions, the advantages of this invention are as follows: This cable duct sealing device, by providing an adjustment component on each rubber block, can adjust the inner and outer diameters of a single rubber block, solving the problem of limited adaptability of existing devices to non-standard diameter pipes, and adapting to more pipe specifications; in use, the mandrel is pulled out to replace the cable, and in conjunction with the sealing component, it prevents cable displacement from causing gaps and improves sealing stability; moreover, the inner walls of several rubber blocks can enclose at least one accommodating cavity, which can meet the layered sealing requirements of multiple cables, and the overall design takes into account both sealing reliability and scenario adaptability, effectively solving the shortcomings in the background technology. Attached Figure Description

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

[0018] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the exploded structure of Embodiment 1 of the present invention; Figure 3This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 4 This is a schematic diagram of the exploded structure of Embodiment 2 of the present invention; Figure 5 This is a schematic diagram of the structure of Embodiment 3 of the present invention; Figure 6 This is a schematic diagram of the exploded structure of Embodiment 3 of the present invention.

[0019] Attached reference numerals: 1-Rubber block one, 2-Accommodation cavity, 3-Mandrel, 4-Rubber block two, 5-Semi-circular groove one, 6-Semi-circular groove two, 7-Sealing gasket one, 8-Semi-circular ring plate, 9-Bolt one, 10-Sealing gasket two, 11-Cover plate, 12-Bolt two; 101-Semi-circular groove three. Detailed Implementation

[0020] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0021] Example 1 like Figure 1 and Figure 2 As shown, a cable duct sealing device includes several rubber blocks 1. The outer walls of the rubber blocks 1, together with the inner wall of the duct, form a circle. Each rubber block 1 is equipped with an adjusting component for adjusting its inner and outer diameters. The inner walls of the rubber blocks 1 together form at least one receiving cavity 2. A mandrel 3 is coaxially arranged inside the receiving cavity 2. A sealing component is provided between the mandrel 3 and the inner wall of the receiving cavity 2. The rubber blocks 1 are semi-circular in shape.

[0022] This cable duct sealing device, by incorporating an adjustment component on each rubber block 1, allows for adjustment of the inner and outer diameters of individual rubber blocks 1, overcoming the limitation of existing devices in adapting to non-standard diameter pipes and enabling compatibility with a wider range of pipe specifications. During use, the mandrel 3 is removed to replace the cable, and in conjunction with the sealing component, it prevents cable displacement and gaps, improving sealing stability. Furthermore, the inner walls of several rubber blocks 1 can enclose at least one receiving cavity 2, meeting the requirements for layered sealing of multiple cables. Overall, it balances sealing reliability and scenario adaptability, effectively addressing the shortcomings of the prior art. The rubber blocks 1 are semi-circular in shape, facilitating quick assembly into a complete ring, improving installation convenience and ensuring stable contact with the pipe's inner wall.

[0023] In the above configuration, the sealing assembly includes a second rubber block 4; the second rubber block 4 is cylindrical in shape; the outer wall of the second rubber block 4 is fitted to the inner wall of the first rubber block 1; the inner wall of the second rubber block 4 is fitted to the outer wall of the mandrel 3. The sealing assembly also includes a plurality of semi-circular grooves 5 fixedly formed on the inner wall of the second rubber block 4; the plurality of semi-circular grooves 5 are evenly arranged along the circumference; the outer wall of the mandrel 3 is fitted to the semi-circular grooves 15 and a plurality of semi-circular grooves 26 are evenly arranged along the circumference.

[0024] The sealing assembly uses a cylindrical rubber block 4, whose outer wall fits tightly against the inner wall of rubber block 1 and the outer wall of mandrel 3, forming a double sealing interface. This not only compensates for assembly gaps through the elasticity of the rubber but also enhances the sealing reliability between the cable replacing mandrel 3 and rubber block 1, effectively preventing the intrusion of moisture and impurities. The sealing assembly has uniformly distributed semi-circular grooves 5 and 6 on the inner wall of rubber block 4 and the outer wall of mandrel 3, respectively. Each branch of the cable is placed within the space formed by these grooves, which not only positions the branch wires, preventing them from becoming tangled, but also increases the sealing contact area through the tight fit between the groove walls and the branch wires, filling the tiny gaps between the branch wires and the sealing assembly. Simultaneously, the uniformly distributed semi-circular grooves 5 and 6 restrict circumferential displacement of the branch wires, preventing them from shaking and causing seal failure, further improving the sealing reliability at each branch of the cable and effectively blocking the intrusion of moisture and impurities.

[0025] The adjustment assembly includes adjustment units that are designed to work with the rubber block 1. Each adjustment unit includes two semi-circular ring plates 8. The two semi-circular ring plates 8 are respectively located on the front and rear sides of the rubber block 1. The two semi-circular ring plates 8 are connected by several bolts 9. The bolts 9 penetrate the rubber block 1 axially. The semi-circular ring plates 8 and the rubber block 1 are coaxially arranged and staggered in the circumferential direction. By setting two semi-circular ring plates 8 on the front and rear sides of the rubber block 1 and connecting them with bolts 9 that penetrate the rubber block 1 axially, the adjustment assembly can achieve stable adjustment of the inner and outer diameters of the rubber block 1 by tightening the bolts 9 to compress it, thus adapting to different specifications of pipes and cables. At the same time, the annular structure of the semi-circular ring plates 8 can make the rubber block 1 bear force evenly, avoiding excessive local deformation that could lead to sealing failure. Meanwhile, the through-type connection of the bolts 9 can lock the adjusted size, preventing loosening during long-term use, thus balancing adjustment accuracy and structural stability. The semicircular ring plate 8 and the rubber block 1 are coaxially arranged, which ensures that the rubber block 1 deforms uniformly along the center of the pipe during adjustment, avoiding sealing gaps caused by eccentricity. The two are staggered in the circumferential direction, which allows the pressure of the semicircular ring plate 8 to cover the gap of the rubber block 1, preventing uneven adjustment caused by insufficient local force. The combination of the two settings not only improves the accuracy of adjusting the inner and outer diameters of the rubber block 1, but also ensures the stability of the fit between the rubber block 1 and the pipe and cable after adjustment, further enhancing the sealing effect.

[0026] In use, firstly, the semi-circular rubber blocks 1 are assembled into a complete circle, so that the outer wall of the rubber blocks 1 is initially aligned with the inner wall of the cable conduit. The inner and outer diameters of the rubber blocks 1 are adjusted using the adjustment components on the rubber blocks 1 until the outer wall of the rubber blocks 1 is tightly fitted with the inner wall of the conduit, completing the initial fixation of the device and the conduit and solving the compatibility problem of non-standard diameter conduits. Next, the cylindrical rubber blocks 2 are inserted into the receiving cavity 2 formed by the inner walls of several rubber blocks 1, so that the outer wall of the rubber blocks 2 4 is tightly fitted with the inner wall of the rubber blocks 1, forming the first sealing interface. Then, the mandrel 3 is coaxially placed into the receiving cavity 2, so that the semi-circular groove 6 on the outer wall of the mandrel 3 corresponds precisely with the semi-circular groove 5 on the inner wall of the rubber blocks 2 4, forming a branch cable receiving space. Each branch cable is placed into this space one by one, realizing the branch cable positioning and forming a second seal through the fit of the groove walls, preventing the branch cables from tangling or shifting.

[0027] Example 2 The difference from Example 1 is that, as Figure 3 , Figure 4 As shown, the sealing assembly includes several coaxially arranged sealing gaskets 7; the inner diameter of the sealing gaskets 7 gradually increases, and they are sequentially nested; each sealing gasket 7 includes two semi-circular ring gaskets. The sealing assembly uses several coaxial sealing gaskets 7 with gradually changing inner diameters, and each sealing gasket 7 has a structure of two semi-circular ring gaskets: it can flexibly adapt to cables of different diameters through the gradual inner diameter characteristic without replacing the entire sealing assembly; it can also be quickly installed without disassembling the cable thanks to the opening and closing design of the semi-circular ring gaskets, greatly simplifying the operation process; at the same time, the multi-layer nested structure can form multiple sealing interfaces, blocking gaps layer by layer, further improving sealing reliability and effectively preventing the intrusion of moisture and impurities.

[0028] The basic installation and adjustment process of Example 2 is the same as that of Example 1: First, the semi-circular rubber block 1 is spliced ​​into a complete circle. The inner and outer diameters are adjusted by adjusting the components so that the outer wall of the rubber block 1 fits tightly with the inner wall of the pipe, thus completing the fixed adaptation of the device and the pipe.

[0029] The core difference from Embodiment 1 lies in the assembly of the sealing components: for the cable inside the accommodating cavity 2, a sealing gasket 7 composed of two semi-circular ring gaskets is used to achieve sealing. During installation, there is no need to disassemble the cable; the semi-circular ring gaskets are directly fitted onto the outside of the cable in an open-close manner. The corresponding number of sealing gaskets 7 are selected according to the cable diameter, and they are coaxially fitted in order of increasing inner diameter, so that the multi-layer sealing gaskets 7 form a gradually adapting structure.

[0030] The multi-layered sealing gasket 7 tightly wraps the cable through the splicing of semi-circular ring gaskets, while its outer wall fits into the accommodating cavity 2 formed by the inner wall of the rubber block 1, forming a multi-layered sealing interface; the gradual inner diameter characteristic can flexibly adapt to cables of different diameters without replacing the entire set of components; the opening and closing design greatly simplifies the installation process, and finally, through the multi-layered sealing structure blocking gaps layer by layer, a reliable seal between the cable and the accommodating cavity 2 is ensured, effectively preventing the intrusion of moisture and impurities.

[0031] Example 3 like Figure 5 , Figure 6 As shown, a cable duct sealing device includes several rubber blocks 1, the outer walls of which, together with the inner wall of the duct, form a circle. The device is characterized in that each rubber block 1 is equipped with an adjustment component for adjusting its inner and outer diameters; the inner walls of the rubber blocks 1 together form at least one receiving cavity 2; a mandrel 3 is coaxially arranged within the receiving cavity 2; and a sealing component is provided between the mandrel 3 and the inner wall of the receiving cavity 2.

[0032] The rubber block 1 has a fan-shaped cross-section; three rubber blocks 1 are provided; a semi-circular groove 3 101 is opened on each radial side of the rubber block 1; the semi-circular grooves 3 101 of two adjacent rubber blocks 1 form a receiving cavity 2. The sealing assembly includes several coaxially arranged sealing gaskets 2 10; the inner diameter of the sealing gaskets 2 10 gradually increases and they are arranged sequentially; each sealing gasket 2 10 includes two semi-circular ring gaskets. The adjusting assembly includes adjusting units that are configured to cooperate with the rubber blocks 1; each set of adjusting units includes two cover plates 11; the two cover plates 11 are respectively arranged on the front and rear sides of the rubber block 1; the two cover plates 11 are connected by several bolts 2 12; the bolts 2 12 are arranged to penetrate the rubber block 1 along the axial direction of the rubber block 1.

[0033] Rubber block 1 is designed with three fan-shaped cross-sections. It can be stably assembled into a circle that fits the inner wall of the pipe through three-point splicing, ensuring overall fit stability. It can also be spliced ​​with the semi-circular grooves 101 on each radius side and the semi-circular grooves 101 of the adjacent rubber block 1 to form a receiving cavity 2. It can accurately adapt to the laying needs of multiple cables, realize the independent positioning and separation of cables, and avoid mutual entanglement. At the same time, the fan-shaped splicing surface and the groove body can reduce the splicing gap, further improve the overall sealing performance, and effectively prevent moisture and impurities from entering. The sealing assembly employs several coaxial sealing gaskets 10 with gradually changing inner diameters, each gasket 10 consisting of two semi-circular rings. The opening and closing design of these semi-circular rings allows for quick installation without cable disassembly, significantly simplifying the construction process. The gradually changing inner diameter also allows for flexible adaptation to cables of different diameters, eliminating the need to replace the entire sealing assembly and reducing adaptation costs. Furthermore, the multi-layered structure creates multiple sealing interfaces, blocking gaps layer by layer, effectively improving sealing reliability and preventing the intrusion of moisture and impurities. The adjustment assembly uses two cover plates 11 on the front and rear sides of the rubber block 1, connected by axially penetrating bolts 12. Tightening the bolts 12 allows for precise compression of the rubber block 1, stably adjusting its inner and outer diameters to flexibly adapt to different pipe and cable specifications. The complete coverage of the cover plates 11 ensures more even force distribution on the rubber block 1, preventing excessive local deformation that could lead to sealing gaps. Simultaneously, the through-type connection of the bolts 12 locks the adjusted dimensions, preventing loosening during long-term use and further enhancing sealing stability, effectively ensuring the overall sealing effect.

[0034] In use, firstly, the three rubber blocks 1 with fan-shaped cross sections are spliced ​​together so that their outer walls together form a circle that fits the inner wall of the pipe; during the splicing process, the semi-circular grooves 3 101 on the radial side of the adjacent rubber blocks 1 are combined to form a receiving cavity 2, which is used to independently accommodate and separate multiple cables to avoid them from getting tangled together.

[0035] Next, adjust the size of rubber block 1 by adjusting the components: using the cover plates 11 on the front and rear sides of rubber block 1, tighten the bolts 12 that pass through rubber block 1, so that the cover plates 11 evenly squeeze rubber block 1, and accurately adjust its inner and outer diameters until the outer wall of rubber block 1 fits tightly against the inner wall of the pipe. At the same time, lock the adjusted size to prevent loosening during long-term use and ensure stable fit between the device and the pipe.

[0036] Finally, the cable inside the accommodating cavity 2 is sealed: a sealing gasket 2 10 composed of two semi-circular ring gaskets is used and is fitted over the cable with an open and close design; the corresponding number of sealing gaskets 2 10 are selected according to the cable diameter and are coaxially fitted in order of increasing inner diameter, so that the multi-layer sealing gaskets 2 10 form a gradually adapting structure, with its outer wall fitting against the inner wall of the accommodating cavity 2 and its inner wall in close contact with the cable, forming a multi-layer sealing interface.

[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cable duct sealing device, comprising a plurality of rubber blocks (1), wherein the outer walls of the plurality of rubber blocks (1) cooperate with the inner wall of the duct to form a circle, characterized in that, Each rubber block (1) is equipped with an adjustment component, which is used to adjust the inner and outer diameters of the rubber block (1); the inner walls of several rubber blocks (1) together form at least one accommodating cavity (2); a mandrel (3) is coaxially arranged in the accommodating cavity (2); a sealing component is provided between the mandrel (3) and the inner wall of the accommodating cavity (2).

2. The cable duct sealing device according to claim 1, characterized in that, The rubber block (1) is semi-circular.

3. The cable duct sealing device according to claim 2, characterized in that, The sealing assembly includes a second rubber block (4); the second rubber block (4) is cylindrical in shape; the outer wall of the second rubber block (4) is fitted with the inner wall of the first rubber block (1); the inner wall of the second rubber block (4) is fitted with the outer wall of the mandrel (3).

4. The cable duct sealing device according to claim 3, characterized in that, The sealing assembly also includes several semi-circular grooves (5) fixedly opened on the inner wall of the rubber block (4); the several semi-circular grooves (5) are evenly arranged along the circumferential direction; the outer wall of the mandrel (3) is fitted with the semi-circular grooves (5) and several semi-circular grooves (6) are evenly arranged along the circumferential direction.

5. The cable duct sealing device according to claim 3, characterized in that, The sealing assembly includes several coaxially arranged sealing gaskets (7); the inner diameter of the several sealing gaskets (7) gradually increases and they are arranged in sequence; each sealing gasket (7) includes two semi-circular ring gaskets.

6. The cable duct sealing device according to claim 4 or 5, characterized in that, The adjustment assembly includes an adjustment unit that is set to cooperate with the rubber block (1); each adjustment unit includes two semi-circular ring plates (8); the two semi-circular ring plates (8) are respectively set on the front and rear sides of the rubber block (1); the two semi-circular ring plates (8) are connected by several bolts (9); the bolts (9) are set to pass through the rubber block (1) along the axial direction of the rubber block (1).

7. The cable duct sealing device according to claim 6, characterized in that, The semicircular ring plate (8) and the rubber block (1) are coaxially arranged, and the semicircular ring plate (8) and the rubber block (1) are staggered in the circumferential direction.

8. The cable duct sealing device according to claim 1, characterized in that, The cross-section of the rubber block 1 (1) is fan-shaped; there are three rubber blocks 1 (1); a semi-circular groove 3 (101) is opened on each radius side of the rubber block 1 (1); the semi-circular groove 3 (101) of two adjacent rubber blocks 1 (1) forms a receiving cavity (2).

9. The cable duct sealing device according to claim 8, characterized in that, The sealing assembly includes several coaxially arranged sealing gaskets (10); the inner diameter of the several sealing gaskets (10) gradually increases and they are arranged in sequence; each sealing gasket (10) includes two semi-circular ring gaskets.

10. The cable duct sealing device according to claim 9, characterized in that, The adjustment assembly includes an adjustment unit that is set to cooperate with the rubber block (1); each adjustment unit includes two cover plates (11); the two cover plates (11) are respectively set on the front and rear sides of the rubber block (1); the two cover plates (11) are connected by several bolts (12); the bolts (12) are set to pass through the rubber block (1) along the axial direction of the rubber block (1).

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