A cable wall penetration seal assembly

Abstract

The application provides a sealing assembly for a cable wall hole, comprising a sealing body, a rebound layer and a contact layer; the rebound layer is arranged on the sealing body, and the rebound layer comprises a rebound base and a plurality of rebound pieces; the rebound base comprises a first base and a plurality of second bases, the first base, the rebound pieces and each second base are sequentially fixed and connected in the radial direction, and the first base is arranged on the sealing body; the contact layer is provided with a cylindrical cavity along the axial direction of the contact layer, and the side of the contact layer away from the cylindrical cavity is fixedly connected with the second base; wherein, when the cable passes through the contact layer and abuts against the contact layer, the cable abuts against the inner surface of the contact layer in the axial direction of the contact layer, the contact layer extrudes the rebound pieces in the radial direction of the contact layer to increase the diameter of the cavity, so as to adapt to cables with different sizes. The installation efficiency is improved, the types and the quantity of spare parts are greatly reduced, and the maintenance cost and the management burden are effectively reduced.

Description

Technical Field

[0001] This application relates to the field of cable sealing, and more particularly to a sealing assembly for cable through-wall holes. Background Technology

[0002] Existing cable penetration sealing assemblies typically consist of a housing fixed to the wall and a built-in sealing bushing. The bushing grips the cable to achieve a seal, thereby protecting the cable and ensuring its normal operation.

[0003] In practical applications, current components of this type generally employ a replaceable bushing design to accommodate cables of different sizes. When the cable specifications change, a corresponding sealing bushing with a different bore diameter needs to be replaced.

[0004] However, this existing design has obvious flaws. The need to frequently replace the bushings for cables of different sizes not only increases the complexity of on-site construction but also leads to a burden on spare parts management and storage, thus exacerbating the problems of maintenance costs and low work efficiency. Utility Model Content

[0005] In view of this, it is necessary to provide a sealing assembly for a variable aperture cable through-wall hole to solve the above problems.

[0006] Embodiments of this application provide a sealing assembly for cable penetration holes, comprising: Sealing body; A spring layer is disposed on the sealing body, and the spring layer includes a spring base and a plurality of spring components; The spring-loaded base includes a first base and a plurality of second bases. The first base, the spring-loaded component, and each of the second bases are fixedly connected in a radial direction. The first base is disposed on the sealing body. A contact layer, wherein a cylindrical cavity is formed along its axial direction, and the side of the contact layer opposite to the cylindrical cavity is fixedly connected to the second base; When the cable passes through the contact layer and comes into contact, viewed along the axial direction of the contact layer, the cable abuts against the inner surface of the contact layer, and the contact layer compresses the spring member radially to increase the cavity diameter, in order to accommodate cables of different sizes.

[0007] In at least one embodiment of this application, the rebound layer further includes an elastic cavity located between the rebound member and the first base.

[0008] In at least one embodiment of this application, each of the second bases corresponds one-to-one with each of the spring-loaded components, and the second base is made of aluminum.

[0009] In at least one embodiment of this application, there is a first interval between two adjacent second bases, denoted as a, and a second interval between the spring-loaded components, denoted as b, satisfying the relationship: a < b.

[0010] In at least one embodiment of this application, the contact layer includes a reinforcing layer and a soft layer, the reinforcing layer and the soft layer are bonded to each other, the side of the reinforcing layer opposite to the cylindrical cavity is fixedly connected to the second base, and the soft layer is fixedly connected to the side of the reinforcing layer opposite to the sealing body.

[0011] In at least one embodiment of this application, the thickness of the soft layer is denoted as c, and the thickness of the reinforcing layer is denoted as d, satisfying the relationship: c < d.

[0012] In at least one embodiment of this application, the soft layer includes an inlet portion, which is a chamfered structure on both ends of the soft layer, and the inlet portion is located on the side close to the cylindrical cavity.

[0013] In at least one embodiment of this application, the soft layer is rubber and the reinforcing layer is polyurethane.

[0014] In at least one embodiment of this application, the sealing body includes a fixing groove, which is disposed on the side of the sealing body opposite to the cylindrical cavity.

[0015] In at least one embodiment of this application, the sealing body further includes a fixing member disposed in the fixing groove, the fixing member being made of rubber and the fixing member being interference-fitted with the fixing groove.

[0016] The aforementioned cable through-wall sealing assembly employs a variable-diameter elastic sealing element structure, which automatically adjusts the sealing orifice diameter according to the cable's outer diameter, achieving adaptive sealing for various cable specifications with a single component. The rebound element in the sealing assembly undergoes radial elastic deformation to adapt to different cable outer diameters based on actual cable size changes, while maintaining a constant sealing pressure. Combined with the contact layer adhering to the cable, this achieves a seal matched to the cable's actual size. This improvement not only simplifies the construction process and improves installation efficiency but also significantly reduces the types and quantity of spare parts required, effectively lowering maintenance costs and management burden. Attached Figure Description

[0017] Figure 1 This is an overall structural diagram of a sealing assembly for a cable through-wall hole as described in this application; Figure 2 This is an exploded view of the overall structure of the sealing assembly for a cable through-wall hole as described in this application; Figure 3 This application presents a force diagram of the contact layer and a deformation direction diagram of the springback component. Figure 4 This is a cross-sectional view of a sealing assembly for a cable through-wall hole as described in this application.

[0018] Explanation of main component symbols 100. Sealing assembly for cable penetration hole; 20. Sealing body; 21. Fixing groove; 22. Fixing element; 30. Resilient layer; 31. Resilient base; 311. First base; 312. Second base; 32. Resilient element; 33. Elastic cavity; 34. First gap; 35. Second gap; 40. Contact layer; 41. Cylindrical cavity; 42. Reinforcing layer; 43. Soft layer; 431. Insertion part. Detailed Implementation

[0019] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0020] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0021] Embodiments of this application provide a sealing assembly for a cable through-wall hole, including a sealing body, a spring layer, and a contact layer. The spring layer is disposed on the sealing body and includes a spring base and multiple spring elements. The spring base includes a first base and multiple second bases, and the first base, the spring elements, and each second base are fixedly connected radially in sequence. The first base is disposed on the sealing body. The contact layer has a cylindrical cavity along its axial direction, and the side of the contact layer opposite to the cylindrical cavity is fixedly connected to the second base. When a cable passes through the contact layer and abuts, viewed along the axial direction of the contact layer, the cable abuts the inner surface of the contact layer, and the contact layer compresses the spring elements radially to increase the diameter of the cavity, for adapting to cables of different sizes.

[0022] The aforementioned cable through-wall sealing assembly employs a variable-diameter elastic sealing element structure, which automatically adjusts the sealing orifice diameter according to the cable's outer diameter, achieving adaptive sealing for various cable specifications with a single component. The rebound element in the sealing assembly undergoes radial elastic deformation to adapt to different cable outer diameters based on actual cable size changes, while maintaining a constant sealing pressure. Combined with the contact layer adhering to the cable, this achieves a seal matched to the cable's actual size. This improvement not only simplifies the construction process and improves installation efficiency but also significantly reduces the types and quantity of spare parts required, effectively lowering maintenance costs and management burden.

[0023] The following is in conjunction with the appendix Figures 1-4 This application provides a sealing assembly 100 for a cable through-wall hole, including a sealing body 20, a spring layer 30, and a contact layer 40. The spring layer 30 is disposed on the sealing body 20 and includes a spring base 31 and a plurality of spring elements 32. The spring base 31 includes a first base 311 and a plurality of second bases 312. The first base 311, the spring elements 32, and each of the second bases 312 are fixedly connected radially in sequence, and the first base 311 is disposed on the sealing body 20. The contact layer 40 has a cylindrical cavity 41 along its axial direction, and the side of the contact layer 40 away from the cylindrical cavity 41 is fixedly connected to the second base 312. When a cable passes through the contact layer 40 and abuts, viewed along the axial direction of the contact layer 40, the cable abuts the inner surface of the contact layer 40, and the contact layer 40 compresses the spring elements 32 radially to increase the diameter of the cavity, for adapting to cables of different sizes.

[0024] Specifically, in this embodiment, it should be noted that the sealing assembly 100 for cable through-wall holes consists of a sealing body 20, a spring layer 30, and a contact layer 40. The spring layer 30 is disposed on the sealing body 20 and is composed of a spring base 31 and multiple spring elements 32. The spring base 31 includes a first base 311 and multiple second bases 312. In the radial direction, the first base 311, the spring elements 32, and the second bases 312 are sequentially fixedly connected. The contact layer 40 has a cylindrical cavity 41 along its axial direction to provide a guiding and sealing interface for the cable. The side of the contact layer 40 away from the cylindrical cavity 41 is fixedly connected to the second base 312, so that the contact layer 40 can reliably transmit the radial load to the spring elements 32 when subjected to force.

[0025] Furthermore, when the cable penetrates along the axial direction of the contact layer 40 and comes into contact with the inner surface of the contact layer 40, the contact layer 40 is locally subjected to radial pressure caused by the outer diameter of the cable, and flexes outward in the radial direction and compresses the corresponding spring member 32; the compressed spring member 32 stores energy and forms a reaction force, causing the diameter of the cylindrical cavity 41 to passively increase with the actual outer diameter of the cable, thereby adapting to cables of different sizes without replacing the components.

[0026] Furthermore, during service, if the cable experiences slight displacement or equivalent change in outer diameter due to temperature, vibration, or installation eccentricity, the contact layer 40 and the spring-loaded component 32 work together to elastically follow the cable, maintaining circumferential fit and sealing. When the cable is pulled out, the spring-loaded component 32 releases its elastic potential energy, pushing the contact layer 40 back to its initial state. The component then resets and enters standby mode, demonstrating that the component has good pluggable reusability and size compatibility. This reduces the frequency of replacement while maintaining size compatibility, improving the flexibility and maintenance efficiency of through-wall wiring.

[0027] In one specific embodiment, the rebound layer 30 further includes an elastic cavity 33, which is located between the rebound member 32 and the first base 311.

[0028] Specifically, in this embodiment, it should be noted that the rebound layer 30 has an elastic cavity 33 between the first base 311 and the plurality of rebound members 32, which is formed by the first base 311 and the plurality of rebound members 32. During operation, the deformation space reserved in the elastic cavity 33 provides stronger elastic performance compared to a solid elastic member.

[0029] Furthermore, the deformation space provided by the elastic cavity 33, combined with the elasticity of the rebound member 32, forms a larger effective diameter expansion stroke, which can achieve more complete circumferential fit for cables with different outer diameters, tolerances, eccentricities or ellipticities, and more uniform circumferential contact pressure.

[0030] In one specific embodiment, each of the second bases 312 corresponds one-to-one with each of the spring-loaded members 32, and the second bases 312 are made of aluminum.

[0031] Specifically, in this embodiment, it should be noted that the circumferential force-bearing unit is composed of the first base 311, the corresponding spring member 32, the corresponding second base 312, and the contact layer 40 fixedly connected to the second base 312. When the cable is inserted along the axial direction of the contact layer 40 and abuts against the inner surface of the contact layer 40, the radial load generated by the contact layer 40 at the corresponding position is sequentially transmitted to the first base 311 and the sealing body 20 through the second base 312 and the corresponding spring member 32 at that position. The deformation is mainly limited within the corresponding partition and will not spread disorderly to adjacent partitions.

[0032] Furthermore, each of the second bases 312 and each of the spring members 32 are in one-to-one correspondence so that the outer deflection of the contact layer 40 is borne by the corresponding partition, and the spring members 32 enter the compression in an orderly manner according to their positions, making the diameter expansion process more stable and controllable.

[0033] Furthermore, consistent zone support and constraint conditions help maintain relatively uniform circumferential contact pressure and fit even when the cable has outer diameter tolerances or slight eccentricity.

[0034] In one specific embodiment, there is a first interval 34 between two adjacent second bases 312, denoted as a, and there is a second interval 35 between the spring-loaded members 32, denoted as b, satisfying the relationship: a < b.

[0035] Specifically, there is a first interval 34a between two adjacent second bases 312 and a second interval 35b between the spring members 32, and a < b. In effect, the circumferential projection coverage length of the second base 312 on the first base 311 is longer than the circumferential projection coverage length of the corresponding spring member 32 on the first base 311. The longer circumferential coverage of the second base 312 allows the contact layer 40 to be fully supported and wrapped at the pressure point, suppressing unstable deformations such as local outward turning and wrinkling, and making the cable insertion force smoother with displacement.

[0036] Furthermore, the longer second base 312 circumferentially covers the cable, making the circumferential contact pressure distribution between the contact layer 40 and the cable more uniform. Even with outer diameter tolerances or slight eccentricity, this helps maintain the stability of the fit and seal.

[0037] In one specific embodiment, the contact layer 40 includes a reinforcing layer 42 and a soft layer 43, which are attached to each other. The side of the reinforcing layer 42 facing away from the cylindrical cavity 41 is fixedly connected to the second base 312, and the soft layer 43 is fixedly connected to the side of the reinforcing layer 42 facing away from the sealing body 20.

[0038] Specifically, in this embodiment, it should be noted that the contact layer 40 is composed of a reinforcing layer 42 and a soft layer 43 that are attached to each other; wherein, the side of the reinforcing layer 42 facing away from the cylindrical cavity 41 is fixedly connected to the second base 312, and the soft layer 43 is disposed on the side of the reinforcing layer 42 facing away from the sealing body 20 and fixedly connected thereto. The contact layer 40 forms a cable contact interface composed of the soft layer 43 on the inner side of the axially opened cylindrical cavity 41, and forms a stable support interface with the second base 312 through the reinforcing layer 42 on the outer side.

[0039] Furthermore, when the cable penetrates along the axial direction of the contact layer 40 and comes into contact with the inner surface of the contact layer 40, the soft layer 43 first conforms to the outer surface of the cable to form a bond, and the resulting radial load is transmitted to the second base 312 as a whole through the reinforcing layer 42. Under this force transmission relationship, the radial deflection of the contact layer 40 is constrained and guided by the reinforcing layer 42, the soft layer 43 maintains a continuous bonding interface with the cable, and the reinforcing layer 42 maintains a stable connection interface with the second base 312, thereby realizing the controllable expansion and resetting of the contact layer 40 with the outer diameter of the cable.

[0040] Furthermore, the soft layer 43 is located on one side of the cylindrical cavity 41 and is bonded to the reinforcing layer 42, so that the contact layer 40 and the cable form a continuous and compliant bonding interface, making the bonding process smoother and the circumferential contact more uniform, which is conducive to stable sealing and tightness.

[0041] Furthermore, the fixed connection between the reinforcing layer 42 and the second base 312 provides reliable support and force boundary for the contact layer 40. The contact layer 40 is controlled to flex during the expansion and resetting process, suppressing unstable deformations such as local outward turning and wrinkling.

[0042] In one specific embodiment, the thickness of the soft layer 43 is denoted as c, and the thickness of the reinforcing layer 42 is denoted as d, satisfying the relationship: c < d.

[0043] Specifically, the contact layer 40 is composed of a soft layer 43 and a reinforcing layer 42 that are bonded together. The thickness of the soft layer 43 is denoted as c, and the thickness of the reinforcing layer 42 is denoted as d, and c < d. The side of the reinforcing layer 42 facing away from the cylindrical cavity 41 is fixedly connected to the second base 312, and the soft layer 43 is disposed on the side of the reinforcing layer 42 facing away from the sealing body 20 and is fixedly connected thereto.

[0044] Furthermore, the higher bending stiffness provided by the reinforcing layer 42 helps to constrain the posture of the contact layer 40 during the diameter expansion process, suppressing outward turning and wrinkling, making the increase in the diameter of the cylindrical cavity 41 more controllable, thereby maintaining stable circumferential contact pressure and sealing effect when adapting to cables of different sizes.

[0045] In one specific embodiment, the soft layer 43 includes an inlet portion 431, which is a chamfered structure on both ends of the soft layer 43, and the inlet portion 431 is located on the side close to the cylindrical cavity 41.

[0046] Specifically, in this embodiment, it should be noted that the soft layer 43 forms a gradual transition from large to small at its two ends facing the cylindrical cavity 41 through chamfering. When the cable is inserted along the axial direction of the contact layer 40 and first contacts the port of the soft layer 43, the chamfering causes the contact between the cable and the soft layer 43 to gradually transition from point contact or line contact to circumferential surface contact, thereby smoothly converting the axial insertion force into the compliant fit and controllable bending of the soft layer 43, avoiding abrupt edge blocking effect and local wrinkles at the edge of the soft layer 43.

[0047] Furthermore, the guide section 431 guides the cable insertion force to gradually increase with displacement, reducing the initial insertion peak load, reducing transient indentation and abrasion on the cable outer sheath and the end edge of the soft layer 43, effectively reducing port wear, and making the fit between the soft layer 43 and the cable smoother, which helps to improve durability and sealing performance under repeated insertion and removal conditions.

[0048] In one specific embodiment, the soft layer 43 is rubber, and the reinforcing layer 42 is polyurethane.

[0049] Specifically, in this embodiment, it should be noted that the soft layer 43 is responsible for conforming to the outer diameter, tolerance and slight eccentricity of the cable, providing a fitting and sealing interface; the reinforcing layer 42 serves as the load-bearing skeleton of the contact layer 40, uniformly transmitting the radial top pressure on the soft layer 43 to the second base 312, structurally preventing the contact layer 40 from local collapse, outward flipping or irregular bending when under pressure.

[0050] Furthermore, since the soft layer 43 is made of rubber, the rubber layer can be used to flexibly guide and adhere the cable during insertion, reducing the initial insertion force and avoiding sharp indentations on the cable sheath. Since the reinforcing layer 42 is made of polyurethane and is fixedly connected to the second base 312, when the contact layer 40 is pushed open by the cable and needs to bend outward to increase the cavity diameter, the reinforcing layer 42 can provide sufficient support strength and shape retention, so that the diameter expansion process is controlled and the contact layer 40 does not become unstable.

[0051] In one specific embodiment, the sealing body 20 includes a fixing groove 21, which is disposed on the side of the sealing body 20 away from the cylindrical cavity 41.

[0052] Specifically, in this embodiment, it should be noted that an annular fixing groove 21 is provided on the side of the sealing body 20 away from the cylindrical cavity 41, with the groove opening facing the outside of the sealing body 20; the fixing groove 21 defines the placement position of the required accessories, prevents the required accessories from dislodging during use, and improves the overall assembly consistency of the sealing body 20.

[0053] In one specific embodiment, the sealing body 20 further includes a fixing member 22 disposed in the fixing groove 21. The fixing member 22 is made of rubber and is interference-fitted with the fixing groove 21.

[0054] Specifically, in this embodiment, it should be noted that during assembly, the rubber fastener 22 is pressed into the fixing groove 21 with a predetermined interference fit. The elasticity of the rubber forms a continuous circumferential preload and contact compression between the groove wall and the fastener 22, thereby making the fastener 22 stably positioned in the radial and circumferential directions. Furthermore, the overall sealing assembly after assembling the fastener 22 is interference-fitted with the through-wall hole.

[0055] Furthermore, the interference between the fixing groove 21 and the rubber fastener 22 forms a continuous pre-tightening inside the sealing body 20, and the interference between the rubber fastener 22 and the wall of the through hole forms an external pre-tightening on the installation side. The two are connected end to end to form a continuous radial pre-tightening link, which improves the positioning stability of the sealing body 20 in the hole and suppresses circumferential rotation and axial movement.

[0056] Furthermore, the rubber material is elastic and compressible, which can adaptively compensate for the dimensional tolerances and surface irregularities of the fixing groove 21 and the wall of the through hole, reduce the assembly gap, and improve the fit consistency and assembly tolerance.

[0057] Furthermore, the rubber fastener 22, under interference fit, has a buffering and energy dissipation effect on vibration and impact, reducing the direct transmission of peak load to the sealing body 20 structure, which is beneficial to maintaining the circumferential fit and sealing continuity of the contact layer 40 to the cable under long-term vibration and repeated insertion and removal conditions.

[0058] Therefore, the cable through-wall sealing assembly described above, by employing a variable-diameter elastic sealing element structure, can automatically adjust the sealing orifice diameter according to the cable's outer diameter, achieving adaptive sealing of multiple cable specifications with a single component. The rebound element 32 in the sealing assembly undergoes radial elastic deformation according to changes in the actual cable size to adapt to different cable outer diameters, while maintaining a constant sealing pressure. Combined with the contact layer 40, it adheres to the cable to achieve a seal matched to the actual cable size. This improvement not only simplifies the construction process and improves installation efficiency but also significantly reduces the types and quantity of spare parts, effectively lowering maintenance costs and management burden.

[0059] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A sealing assembly for cable penetration holes, characterized in that, include: Sealing body; A spring layer is disposed on the sealing body, and the spring layer includes a spring base and a plurality of spring components; The spring-loaded base includes a first base and a plurality of second bases. The first base, the spring-loaded component, and each of the second bases are fixedly connected in a radial direction. The first base is disposed on the sealing body. A contact layer, wherein a cylindrical cavity is formed along its axial direction, and the side of the contact layer opposite to the cylindrical cavity is fixedly connected to the second base; When the cable passes through the contact layer and comes into contact, viewed along the axial direction of the contact layer, the cable abuts against the inner surface of the contact layer, and the contact layer compresses the spring member radially to increase the cavity diameter, in order to accommodate cables of different sizes.

2. The sealing assembly for cable through-wall holes according to claim 1, characterized in that, The rebound layer further includes an elastic cavity located between the rebound member and the first base.

3. The sealing assembly for cable through-wall holes according to claim 1, characterized in that, Each of the second bases corresponds one-to-one with each of the spring-loaded components, and the second bases are made of aluminum.

4. The sealing assembly for cable through-wall holes according to claim 1, characterized in that, There is a first interval between two adjacent second bases, denoted as a, and there is a second interval between the spring-loaded components, denoted as b, satisfying the relationship: a < b.

5. The sealing assembly for cable through-wall holes according to claim 1, characterized in that, The contact layer includes a reinforcing layer and a soft layer, which are bonded to each other. The side of the reinforcing layer away from the cylindrical cavity is fixedly connected to the second base, and the soft layer is fixedly connected to the side of the reinforcing layer away from the sealing body.

6. The sealing assembly for cable through-wall holes according to claim 5, characterized in that, The thickness of the soft layer is denoted as c, and the thickness of the reinforcing layer is denoted as d, satisfying the relationship: c < d.

7. The sealing assembly for cable through-wall holes according to claim 5, characterized in that, The soft layer includes an inlet section, which is a chamfered structure on both ends of the soft layer and is located on the side close to the cylindrical cavity.

8. The sealing assembly for cable through-wall holes according to claim 5, characterized in that, The soft layer is rubber, and the reinforcing layer is polyurethane.

9. The sealing assembly for cable through-wall holes according to claim 1, characterized in that, The sealing body includes a fixing groove, which is located on the side of the sealing body opposite to the cylindrical cavity.

10. The sealing assembly for cable through-wall holes according to claim 9, characterized in that, The sealing body also includes a fixing member disposed in the fixing groove. The fixing member is made of rubber and is interference-fitted with the fixing groove.

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