A sealing and protective fixing device for power cables passing through walls

Abstract

This application belongs to the technical field of power construction equipment, specifically disclosing a sealing and protective fixing device for power cables passing through walls. It includes a protective fixing shell and a fixing plate fixedly connected inside the protective fixing shell. A rotating shaft is rotatably mounted on the protective fixing shell, and a rotating plate is fixedly connected to the surface of the rotating shaft. The rotating plate has a first arc-shaped guide groove inside, and the fixing plate has a second guide groove arranged radially inside. A slider slides within the second guide groove and has an insertion pin fixedly connected to its side. A guide post is fixedly connected to the end face of the slider. This invention uses the rotating shaft to drive the rotating plate to rotate, and utilizes the arc groove and radial groove to cross-limit the guide post, converting the rotation into a linear motion of the insertion pin expanding outwards. This achieves purely mechanical retention and fastening, eliminating the need for reinforcing adhesive and preventing overflow adhesive from clogging the cable passage. The reversible mechanical structure adapts to various hole diameters, ensuring non-destructive disassembly later.

Description

Technical Field

[0001] This application relates to the field of power construction equipment technology, specifically to a sealing and protective fixing device for power cables passing through walls. Background Technology

[0002] In power cable laying operations during power distribution projects, cables need to pass through building walls that span different areas. To prevent the rough edges of wall holes from abrading the outer insulation layer of the cables, protective sleeves or fixing devices are usually pre-installed inside the wall holes, allowing the cables to pass through the casing and completing the foundation support and isolation.

[0003] During installation, existing through-wall protective fixing devices typically involve workers inserting a cylindrical sheath into the wall opening. Irregularities and dimensional deviations in the inner wall surface during drilling can cause gaps of varying degrees between the outer wall of the sheath and the wall of the hole. To maintain overall structural stability, chemical expanding adhesive or polyurethane foam is usually injected into the gap, relying on the adhesion of the cured adhesive to fix the sheath in the wall hole.

[0004] Chemical adhesive injection bonding is difficult to control in terms of flow range. Uncured reinforcing adhesive can easily overflow along the end gaps and flow into the internal channels of the sheath. The hardened adhesive block will occupy the cable threading space and directly block the passage of subsequent cables. When old lines need to be dismantled and reinstalled during renovation, the solidified adhesive will firmly bond the sheath to the wall. The dismantling process usually requires destructive chiseling of the surrounding walls, making it difficult to adapt to rapid installation and non-destructive removal operations for different holes.

[0005] Therefore, this utility model proposes a sealing and protective fixing device for power cables passing through walls to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems in the existing technology of power cable through-wall protection equipment, which uses chemical glue for fixing, which can easily lead to glue overflow blocking the cable passage space and subsequent disassembly and assembly requires damage to the wall, this application provides a power cable through-wall sealing and protection fixing device to solve the problems of channel blockage caused by glue bonding and difficulty in non-destructive disassembly in the existing technology.

[0007] This utility model provides a sealing and protective fixing device for power cables passing through walls, including a protective fixing shell and a fixing plate fixedly connected to the side surface of the protective fixing shell. The protective fixing shell has a power cable passing through groove inside, and a first adjustment component and a guide component are provided on the protective fixing shell.

[0008] The guide assembly includes the fixing plate, the fixing plate has a second guide groove inside, a slider is slidably connected to the inner surface of the second guide groove, and an insertion pin is fixedly connected to the side surface of the slider.

[0009] Furthermore, the first adjustment component includes a rotating shaft rotatably connected to the protective fixed housing, a rotating plate fixedly connected to the side surface of the rotating shaft, a first guide groove being provided inside the rotating plate, a guide post being slidably inserted inside the first guide groove, and the surface of the guide post being fixedly connected to the slider.

[0010] The number of second guide grooves is multiple, and the multiple second guide grooves are evenly arranged radially along the circumference of the groove through which the power cable passes. The trajectory shape of the first guide groove is arc-shaped. The number of the first guide grooves matches the number of guide posts. The cooperation of multiple radial guide grooves ensures that multiple sets of insertion pins undergo radial displacement synchronously.

[0011] A bearing is fixedly connected inside the protective housing. The outer surface of the rotating shaft is fixedly connected to the inner ring of the bearing, and the outer ring of the bearing is fixedly connected to the inner wall of the protective housing. The bearing provides stable support for the rotational movement of the rotating shaft.

[0012] A rubber block is fixedly connected inside the second guide groove near the center end. In the initial contracted state, the insertion pin is inserted near the end of the rubber block and hidden inside the rubber block. The rubber block forms an elastic cover and shield for the end of the insertion pin.

[0013] The outer surface of the protective fixed housing is provided with a second adjustment component. The second adjustment component is detachably connected to the rotating shaft. The second adjustment component includes a handle. An insertion block is fixedly connected to the right surface of the handle. An insertion groove is opened inside the rotating shaft at the corresponding mating position. The inner surface of the insertion groove is slidably connected to the insertion block. The external torque input is cut off by a detachable sliding insertion and removal structure.

[0014] A baffle is fixedly connected to the end edge of the protective fixed housing. The entire surface of the baffle is perpendicular to the central axis of the protective fixed housing. The baffle covers the gap between the outer wall of the protective fixed housing and the through-wall opening.

[0015] Compared with the prior art, this application has at least the following beneficial effects:

[0016] 1. Based on further analysis and research of the problems in the prior art, this application recognizes that the existing methods of fixing cables through walls rely on chemical reinforcing adhesives, which can easily cause the adhesive to overflow and block the internal cable passage space. By constructing a mechanical transmission structure inside the housing, consisting of a rotating shaft, a rotating plate, and a fixed plate, the rotating shaft drives the rotating plate with an arc groove to rotate. Under the linear limiting action of the fixed plate, the rotational motion is converted into the radial linear expansion motion of the insert pins. This achieves the effect of multiple sets of insert pins simultaneously driving outwards into the wall hole wall to complete the purely mechanical fastening, eliminating the need for reinforcing adhesives. The reversible telescopic transmission structure adapts to the rapid fixation and subsequent disassembly operations of different hole diameters.

[0017] 2. This utility model has a separate torque input structure at the outer end of the rotating shaft. The end of the adjustment handle slides into the groove inside the rotating shaft to establish a circumferential limiting connection. After completing the radial expansion operation, the handle assembly is pulled out directly, which directly cuts off the external mechanical force transmission chain after the device is installed. This prevents the rotating shaft after it is fixed from being accidentally touched by unrelated personnel, causing it to rotate in the opposite direction, which would cause the internal insert pin to retract and lead to the overall fixation failure.

[0018] 3. In this utility model, an elastic rubber block is set at the center end of the insertion pin's retraction trajectory. When the device is in the initial uninstalled retracted state, the tip of the insertion pin is concealed and embedded in the rubber block. As the transmission mechanism pushes the insertion pin outward, the tip overcomes friction, breaks free from the elastic wrapping state, and extends outward. The structure of the initial flexible wrapping eliminates the hidden danger of the exposed metal tip scratching the cable insulation or cutting the on-site installation personnel. Attached Figure Description

[0019] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0020] Figure 1 A schematic diagram of the overall structure of a power cable through-wall sealing and protection fixing device provided in this application embodiment;

[0021] Figure 2 This is a schematic diagram of the first adjusting component of a wall-penetrating sealing and protective fixing device for power cables according to this utility model;

[0022] Figure 3 This is a schematic diagram of the guide component structure of a wall-penetrating sealing and protective fixing device for power cables according to this utility model;

[0023] Figure 4 This is a schematic diagram of the rubber block structure of a wall-penetrating sealing and protective fixing device for power cables according to this utility model;

[0024] Figure 5 This is an exploded view of the second adjusting component of a wall-penetrating sealing and protective fixing device for power cables according to this utility model;

[0025] Figure 6 This is a front view of a wall-penetrating sealing and protective fixing device for power cables according to this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Protective and fixed housing;

[0028] 2. First adjusting component; 201. Rotating shaft; 202. Rotating plate; 203. First guide groove; 204. Guide post; 205. Slider;

[0029] 3. Insert the pin;

[0030] 4. Guide assembly; 401. Fixing plate; 402. Second guide groove;

[0031] 5. Rubber blocks;

[0032] 6. Second adjustment component; 601. Handle; 602. Insertion block; 603. Insertion slot;

[0033] 7. Power cables pass through the channel;

[0034] 8. Bearings;

[0035] 9. Baffle. Detailed Implementation

[0036] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "including," "comprising," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0038] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to indicate the general relative positional relationship for the purpose of intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationship in the actual product.

[0039] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0040] Example: Please refer to Figures 1 to 6 This utility model provides a sealing and protective fixing device for power cables passing through walls, which solves the problems in the prior art where wall fixing relies on injecting reinforcing glue, which can easily cause the glue to overflow and block the cable channel, and it is difficult to use mechanical structures to adapt to the hole size to achieve rapid self-adaptation and pure mechanical fixing and disassembly.

[0041] like Figure 1 and Figure 2 As shown, the power cable through-wall sealing and protection fixing device includes a protective fixing housing 1 and a fixing plate 401 fixedly connected to the side surface of the protective fixing housing 1. The protective fixing housing 1 is used as the mounting base of the entire device to support various transmission components. The protective fixing housing 1 has a power cable through groove 7 inside. The power cable through groove 7 is used to allow external cables to pass through and to isolate the cables from the rough wall hole edge. The protective fixing housing 1 is provided with a first adjustment component 2 and a guide component 4.

[0042] The guide assembly 4 includes a fixed plate 401, a second guide groove 402 is provided inside the fixed plate 401, a slider 205 is slidably connected to the inner surface of the second guide groove 402, and an insertion pin 3 is fixedly connected to the side surface of the slider 205. The fixed plate 401 is used to provide a support platform, and the second guide groove 402 is used to linearly limit and guide the movement trajectory of the slider 205 and the insertion pin 3, restricting the slider 205 to only slide radially.

[0043] The first adjustment component 2 includes a rotating shaft 201 rotatably connected to the protective fixed housing 1. A rotating plate 202 is fixedly connected to the side surface of the rotating shaft 201. The rotating shaft 201 is used to receive external torque and drive the rotating plate 202 to rotate synchronously. A first guide groove 203 is provided inside the rotating plate 202. A guide post 204 is slidably inserted inside the first guide groove 203. The left surface of the guide post 204 is fixedly connected to the slider 205. The first guide groove 203 is used to generate a thrust to push the guide post 204 when the rotating plate 202 rotates. With the limiting effect of the second guide groove 402 on the fixed plate 401, the slider 205 is forced to drive the insertion nail 3 to slide radially linearly along the second guide groove 402. The insertion nail 3 is used to penetrate into the wall for mechanical expansion and fixation when moving outward.

[0044] Please refer to the following carefully. Figure 2 and Figure 3 There are multiple second guide grooves 402, which are radially and evenly arranged along the circumference of the power cable passing through the groove 7. The first guide groove 203 inside the rotating plate 202 has an arc-shaped trajectory. The number of first guide grooves 203 matches the number of guide posts 204. In the assembled state, the guide posts 204 slide in the arc-shaped first guide groove 203. The fixing plate 401 provides radial linear limit. When the rotating shaft 201 drives the rotating plate 202 to rotate, the inner wall of the arc-shaped first guide groove 203 squeezes the guide post 204, forcing the guide post 204 to slide radially in a straight line along the second guide groove 402 inside the fixing plate 401. The rotation and actuation of the transmission structure of the multi-point radial guide grooves ensures that multiple sets of sliders 205 and the insertion pins 3 expand outward or contract inward synchronously, providing a uniformly distributed radial retention force for the power cable through-wall sealing and protection fixing device.

[0045] To ensure the smoothness and concentricity of the mechanical transmission, a bearing 8 is fixedly connected inside the protective fixed housing 1. The outer surface of the rotating shaft 201 is fixedly connected to the inner ring of the bearing 8, and the outer ring of the bearing 8 is fixedly connected to the inner wall of the protective fixed housing 1. The rotating shaft 201 is supported by the bearing 8. During the rotation of the rotating plate 202, the bearing 8 reduces the frictional resistance and prevents the rotating shaft 201 from radially shifting, ensuring that the relative position between the rotating plate 202 and the multiple sets of fixed plates 401 remains stable.

[0046] Simultaneously refer to Figure 3 and Figure 4 A rubber block 5 is fixedly connected to the inside of the second guide groove 402 near the center end. In the initial contracted state, the end of the insertion nail 3 near the rubber block 5 is inserted and concealed inside the rubber block 5. The rubber block 5 covers and shields the sharp end of the insertion nail 3. The fit structure of the rubber block 5 elastically wrapping the end of the insertion nail 3 avoids the metal parts being exposed and scratching the operators during the transportation or installation preparation stage. When the rotating plate 202 pushes the slider 205 to drive the insertion nail 3 to slide outward along the second guide groove 402, the end of the insertion nail 3 overcomes the friction force, detaches from the rubber block 5, and extends outward to pierce into the wall.

[0047] Based on the above embodiments, the present invention may further include the following preferred technical solutions:

[0048] As a preferred embodiment, to prevent unauthorized personnel from arbitrarily rotating the transmission structure after equipment installation, which could lead to overall fixation failure, refer to... Figure 1 and Figure 5A second adjustment component 6 is provided on the outer surface of the protective fixing shell 1. The second adjustment component 6 is detachably connected to the rotating shaft 201. The second adjustment component 6 includes a handle 601. An insertion block 602 is fixedly connected to the right surface of the handle 601. An insertion groove 603 is opened inside the rotating shaft 201 at the corresponding mating position. The inner surface of the insertion groove 603 is slidably connected to the insertion block 602. When assembling, the operator aligns the handle 601 and the insertion block 602 together and slides them into the insertion groove 603 at the end of the rotating shaft 201 to form a circumferential limiting docking. Rotating the handle 601 applies a rotational torque to drive the rotating shaft 201 to rotate synchronously. After the position adjustment is completed, the handle 601 is pulled outward to completely disengage the insertion block 602 from the insertion groove 603. The separate insertion and removal structure ensures that the external force driving path of the protective fixing shell 1 is cut off.

[0049] As another preferred embodiment, in order to cover the wall opening and improve the environmental isolation effect at the gaps after installation, refer to Figure 1 and Figure 6 A baffle 9 is fixedly connected to the end edge of the protective fixed housing 1. The entire surface of the baffle 9 is perpendicular to the central axis of the protective fixed housing 1. When the insert nail 3 extends out and is driven into the wall and is under tension, the inner surface of the baffle 9 is simultaneously pressed against the outer surface of the wall. The baffle 9 covers the gap between the through hole and the outer wall of the protective fixed housing 1, preventing dust and impurities from the outside space from entering the wall hole.

[0050] The working principle of this utility model's wall-penetrating sealing and protective fixing device for power cables is as follows:

[0051] During installation, the protective fixing housing 1 is inserted into the wall hole so that the baffle 9 is against the wall surface. External cables pass through the power cable through the groove 7 to complete the wiring. The operator aligns the insertion block 602 at the end of the handle 601 and slides it into the insertion groove 603 at the end of the rotating shaft 201 to complete the circumferential limiting docking.

[0052] When a rotational torque is applied to the handle 601, the rotating shaft 201, under the rotational support inside the bearing 8, drives the rotating plate 202 to rotate synchronously. The side wall of the arc-shaped first guide groove 203 inside the rotating plate 202 rotates accordingly and presses the guide post 204 inserted therein. Under the radial linear limiting action of the second guide groove 402 inside the fixed plate 401, the guide post 204 is pressed and drives the slider 205 to slide outward along the second guide groove 402.

[0053] The slider 205 slides radially outward and pushes the insertion nail 3 synchronously. The end of the insertion nail 3 extends outward, breaks free from the wrapping and blocking state of the rubber block 5, and is embedded in the inner wall of the wall. The multiple sets of insertion nails 3 expand and extend radially in a synchronous manner to provide a uniform radial holding force to complete the mechanical fixation of the entire device. After the fixation is completed, the operator pulls out the handle 601 to let the insertion block 602 disengage from the insertion slot 603 and cut off the external torque input path.

[0054] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A sealing and protective fixing device for power cables passing through walls, comprising a protective fixing housing (1), wherein the interior of the protective fixing housing (1) is provided with a power cable passing through groove (7). Its features are, The protective fixing shell (1) is provided with a first adjustment component (2) and a guide component (4). The guide component (4) includes a fixing plate (401) fixedly connected to the side surface of the protective fixing shell (1). A second guide groove (402) is opened inside the fixing plate (401). A slider (205) is slidably connected to the inner surface of the second guide groove (402). An insertion pin (3) is fixedly connected to the side surface of the slider (205). The first adjustment component (2) includes a rotating shaft (201) rotatably connected to the protective fixed housing (1). A rotating plate (202) is fixedly connected to the side surface of the rotating shaft (201). A first guide groove (203) is provided inside the rotating plate (202). A guide post (204) is slidably passed through the inside of the first guide groove (203). The left surface of the guide post (204) is fixedly connected to the slider (205). The trajectory shape of the first guide groove (203) is arc-shaped. The outer surface of the protective fixed housing (1) is provided with a second adjustment component (6), which is detachably connected to the rotating shaft (201).

2. The wall-penetrating sealing and protective fixing device for power cables according to claim 1, characterized in that, The protective fixed housing (1) is internally fixedly connected to a bearing (8), and the outer surface of the rotating shaft (201) is fixedly connected to the inner ring of the bearing (8).

3. The wall-penetrating sealing and protective fixing device for power cables according to claim 1, characterized in that, A rubber block (5) is fixedly connected inside the second guide groove (402), and the end of the insertion pin (3) near the rubber block (5) is inserted into the interior of the rubber block (5).

4. The wall-penetrating sealing and protective fixing device for power cables according to claim 1, characterized in that, The second adjustment component (6) includes a handle (601), and an insertion block (602) is fixedly connected to the right surface of the handle (601).

5. The wall-penetrating sealing and protective fixing device for power cables according to claim 4, characterized in that, The rotating shaft (201) has an insertion groove (603) inside, and the inner surface of the insertion groove (603) is slidably connected to the insertion block (602).

6. The wall-penetrating sealing and protective fixing device for power cables according to claim 1, characterized in that, A baffle (9) is fixedly connected to the end side edge of the protective fixed housing (1).

7. The wall-penetrating sealing and protective fixing device for power cables according to claim 1, characterized in that, The number of the first guide grooves (203) matches the number of the guide posts (204).

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