Wiring mechanism
By achieving a seamless connection between cable trays and cable ducts, and combining drainage channels and waterproof covers, the safety hazard of water entering the equipment along the cables is solved, improving the safety and stability of electrical equipment.
Patent Information
- Application Number
- CN202423281225.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The existing method of power equipment entry into the project poses a safety hazard of water entering the equipment along the cable, especially in rainy weather or when there is water accumulation in the cable tray, which reduces the safety of the equipment.
Design a cabling mechanism that achieves a seamless connection between cable trays and cable conduits, with the bottom wall of the cable inlet located in front of the cable outlet lower than the bottom wall of the inlet end, combined with drainage channels and waterproof covers to prevent water from entering the equipment along the cable.
It effectively prevents water from entering electrical equipment, improves equipment safety, reduces insulation degradation and short-circuit risk, and enhances connection stability.
Smart Images
Figure CN223843487U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of cable laying equipment technology, specifically to a cabling mechanism. Background Technology
[0002] Currently, one method for power equipment in engineering projects is to run the cables from the top cable trays, turning downwards before entering the equipment. However, water can easily get into the top cable trays. If there is water in the cable trays or if water gets in during rainy weather, the water can travel along the cables into the equipment, posing a serious safety hazard. Utility Model Content
[0003] The purpose of this application is to provide a wiring mechanism that prevents water from entering electrical equipment along the cable as much as possible.
[0004] To address the aforementioned technical problems, this application provides a cabling mechanism, comprising:
[0005] A cable tray near the power generation side, the inside of which forms a first cable guiding cavity, and the cable tray has a cable lead-out end;
[0006] A cable conduit near the power consumption side, the interior of which forms a second cable guiding cavity, the cable conduit having a cable inlet end, the cable inlet end being at least partially inserted into the interior of the cable outlet end, with the port of the cable inlet end as the boundary, the bottom wall of the cable outlet end located in front of the cable inlet end being lower than the bottom wall of the cable inlet end;
[0007] In the direction of cable extension, the direction closer to the power generation side is defined as "front", and the direction closer to the power consumption side is defined as "back".
[0008] In the cabling structure of this application, a first cable guiding cavity is formed inside the cable tray, and a second cable guiding cavity is formed inside the cable conduit. The first and second cable guiding cavities are used for cable passage. The cable inlet end is at least partially inserted into the cable outlet end, thereby achieving a seamless connection between the cable tray and the cable conduit, and a seamless connection between the first and second cable guiding cavities. The cable tray and cable conduit can better protect the cable and avoid blind spots in protection. With the cable inlet end as the boundary, the bottom wall of the cable outlet end located in front of the cable inlet end is lower than the bottom wall of the cable inlet end, so that the cable is slightly raised when it enters the cable conduit from the cable tray, which prevents water from entering the cable conduit along the cable as much as possible, and further prevents water from entering the electrical equipment downwards as much as possible, thereby improving the safety of the electrical equipment.
[0009] Optionally, a drainage channel is formed inside the cable lead-out end below the cable inlet end.
[0010] Optionally, the wiring mechanism further includes:
[0011] A support member is supported between the lower inner wall of the cable lead-out end and the lower outer wall of the cable inlet end.
[0012] Optionally, the inner wall of the support member has a flow hole that extends along the extension direction of the cable lead-out end.
[0013] Optionally, the cable conduit includes:
[0014] A pipe cap having a cable inlet end, the upper end of the pipe cap being an open end, and the pipe cap being partially inserted into the cable outlet end;
[0015] A waterproof cover plate, wherein a portion of the waterproof cover plate is disposed above the area of the pipe cap exposed above the cable lead-out end, and a portion of the waterproof cover plate is disposed above the cable lead-out end, and at least covers the overlapping area of the pipe cap and the cable lead-out end.
[0016] Optionally, the waterproof cover plate has downwardly bent portions at both ends in the width direction, a first distance between the two bent portions, and a second distance between the two outer walls in the width direction of the cable lead-out end, wherein the first distance is not less than the second distance.
[0017] Optionally, the upper ends of the two end walls of the pipe cap extending along the length direction have inwardly folded portions, and the cable pipe further includes a connecting portion that connects the upper side wall of the folded portion and the lower side wall of the waterproof cover.
[0018] Optionally, the connecting part is a foam strip, and the upper sidewall of the folded part and the lower sidewall of the waterproof cover are bonded and fixed by the foam strip.
[0019] Optionally, the sidewalls of the cable lead-out end and the cable inlet end are respectively provided with connection holes in the width direction. The wiring mechanism also includes a connector that passes through the corresponding connection hole to connect the cable lead-out end and the cable inlet end.
[0020] Optionally, the cable conduit further includes:
[0021] A pipe rack extends along the height direction, and the interior of the pipe rack forms a partial structure of the second cable guide cavity. The upper opening of the pipe rack communicates with the lower opening of the pipe cap.
[0022] The pipe seat extends along the height direction, and the interior of the pipe seat forms part of the structure of the second cable guide cavity. The upper opening of the pipe seat communicates with the lower opening of the pipe bracket, and the lower end of the pipe seat forms the cable outlet end. Attached Figure Description
[0023] Figure 1 A schematic diagram of a specific embodiment of the wiring mechanism provided in this application;
[0024] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle;
[0025] Figure 3 for Figure 1 Schematic diagram of cable conduits in a cabling system;
[0026] Figure 4 for Figure 3 A schematic diagram of the second angle of a cable duct;
[0027] Figure 5 for Figure 4 A magnified view of a portion of region B in the middle;
[0028] in, Figures 1-5 The accompanying figure labels are as follows:
[0029] 1-Cable tray; 1a-First cable guide cavity; 1b-Drainage channel; 1A-Cable lead-out end;
[0030] 2-Cable conduit; 2a-Second cable guide cavity; 21-Conduit cap; 211-Folding part; 22-Waterproof cover; 221-Bending part; 23-Connection part; 24-Conduit rack; 25-Conduit seat; 2A-Cable inlet end; O-Port; 2B-Cable outlet end;
[0031] 3-Supporting components;
[0032] 4-Connectors;
[0033] 01-Cable; 02-Electrical equipment. Detailed Implementation
[0034] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0035] In this article, the length direction and the height direction are... Figure 1 Taking the perspective of [the location] as an example, the width direction is [as shown in the original text]. Figure 4 Taking the perspective of [the object] as an example, the length direction, height direction, and width direction are all perpendicular to each other.
[0036] In this article, Figure 2 Taking the perspective of a page as an example, the direction along the height direction closer to the top of the page is "up", and the direction along the height direction closer to the bottom of the page is "down".
[0037] In this article, the direction closer to the inside of cable tray 1 and cable duct 2 is "inner", and the direction closer to the outside of cable tray 1 and cable duct 2 is "outer".
[0038] Please refer to Figures 1-2 , Figure 1 A schematic diagram of a specific embodiment of the wiring mechanism provided in this application; Figure 2 for Figure 1 A magnified view of a portion of region A in the middle.
[0039] This embodiment provides a wiring mechanism, including:
[0040] The cable tray 1 located near the power generation side has a first cable guide cavity 1a formed inside the cable tray 1, and the cable tray 1 has a cable lead-out end 1A.
[0041] The cable conduit 2 is located near the power supply side. The interior of the cable conduit 2 forms a second cable guide cavity 2a. The cable conduit 2 has a cable inlet end 2A. The cable inlet end 2A is at least partially inserted into the interior of the cable outlet end 1A. With the port O of the cable inlet end 2A as the boundary, the bottom wall of the cable outlet end 1A located in front of the cable inlet end 2A is lower than the bottom wall of the cable inlet end 2A.
[0042] In the extension direction of cable 01, the direction closer to the power generation side is defined as "front", and the direction closer to the power consumption side is defined as "back".
[0043] In this embodiment of the wiring mechanism, a first cable guiding cavity 1a is formed inside the cable tray 1, and a second cable guiding cavity 2a is formed inside the cable conduit 2. The first cable guiding cavity 1a and the second cable guiding cavity 2a are connected for the cable 01 to pass through. The cable inlet end 2A is at least partially inserted into the cable outlet end 1A, thereby achieving a seamless connection between the cable tray 1 and the cable conduit 2, and a seamless connection between the first cable guiding cavity 1a and the second cable guiding cavity 2a. The cable tray 1 and the cable conduit 2 can better protect the cable 01 and avoid any blind spots in protection. With the port O of the cable inlet end 2A as the boundary, the bottom wall of the cable outlet end 1A located in front of the cable inlet end 2A is lower than the bottom wall of the cable inlet end 2A, so that when the cable 01 enters the cable conduit 2 from the cable tray 1, it is slightly raised upward, preventing water from entering the interior of the cable conduit 2 along the cable 01, and thus preventing water from entering the electrical equipment 02 along the cable 01, thereby improving the safety of the electrical equipment 02.
[0044] Depend on Figure 1As can be seen, in this embodiment, both ends of the cable conduit 2 have cable inlet ends 2A in the length direction. There are two cable trays 1, which are located at both ends of the cable conduit 2 in the length direction. The two cables 01 enter the interior of the cable conduit 2 from both ends of the cable conduit 2 in the length direction, and then enter the electrical equipment 02 downwards and are electrically connected to the connection end of the electrical equipment 02.
[0045] like Figure 2 As shown, a drainage channel 1b is formed inside the cable lead-out end 1A below the cable inlet end 2A.
[0046] In this way, rainwater entering the cable tray 1 will be discharged to the outside environment along the drainage channel 1b, so as to avoid rainwater accumulating inside the cable tray 1 as much as possible, avoid water accumulation causing a decrease in the insulation performance of cable 01, reduce the risk of cable 01 damage, reduce the risk of short circuit, and improve safety performance.
[0047] Please refer to Figures 1-3 , Figure 3 for Figure 1 A schematic diagram of the cable conduit structure in a cabling system.
[0048] Furthermore, the wiring mechanism in this embodiment also includes:
[0049] Support 3 is supported between the lower inner wall of the cable lead-out end 1A and the lower outer wall of the cable inlet end 2A.
[0050] It is understandable that without the aforementioned support member 3, the portion of the cable entry end 2A inserted into the cable exit end 1A would be suspended in mid-air. The connection between the cable entry end 2A and the cable exit end 1A would always bear the weight of the cable conduit 2, and with prolonged use, the connection between the cable entry end 2A and the cable exit end 1A would be at risk of failure. However, in this embodiment, the wiring mechanism includes the aforementioned support member 3, which provides support for the cable entry end 2A. The connection between the cable entry end 2A and the cable exit end 1A no longer bears the weight of the cable conduit 2, reducing the possibility of failure at the connection and improving the stability of the connection between the cable entry end 2A and the cable exit end 1A.
[0051] The specific structure and quantity of the support member 3 are not limited. For example, the support member 3 can be a block structure to ensure reliable support of the cable inlet end 2A. The number of support members 3 can be one or more. Multiple support members 3 are distributed at intervals along the width or length direction of the cable inlet end 2A. When multiple support members 3 are distributed at intervals along the width direction of the cable inlet end 2A, the accumulated water can flow between two adjacent support members 3 to ensure smooth drainage.
[0052] like Figure 2As shown, in this embodiment, the support member 3 has a flow hole inside, which extends along the extension direction of the cable lead-out end 1A.
[0053] As set up above, the flow hole inside the support member 3 forms a drainage hole, allowing water to flow not only from the outside of the support member 3 but also from the inside of the support member 3, thus avoiding drainage obstruction caused by the support member 3 and improving drainage efficiency.
[0054] Depend on Figure 3 As can be seen, in this embodiment, the upper wall of the support member 3 is connected to the lower outer wall of the cable inlet end 2A. During assembly, the cable inlet end 2A is at least partially inserted into the inside of the cable outlet end 1A, and the lower wall of the support member 3 is supported by the lower inner wall of the cable outlet end 1A.
[0055] In some other embodiments of this application, the lower wall of the support member 3 is connected to the lower inner wall of the cable lead-out end 1A. During assembly, the cable inlet end 2A is at least partially inserted into the inside of the cable lead-out end 1A, and the upper wall of the support member 3 supports the lower outer wall of the cable inlet end 2A.
[0056] Please continue to refer to this. Figure 1 and Figure 2 In this embodiment, the cable conduit 2 includes:
[0057] Pipe cap 21 has a cable inlet end 2A, the upper end of pipe cap 21 is an open end, and part of pipe cap 21 is inserted into the inside of cable outlet end 1A;
[0058] A waterproof cover plate 22 is partially installed over the area of the pipe cap 21 exposed above the cable lead-out end 1A, and partially installed over the cable lead-out end 1A, covering at least the overlapping area of the pipe cap 21 and the cable lead-out end 1A.
[0059] As described above, a portion of the waterproof cover plate 22 is placed over the area of the pipe cap 21 exposed above the cable lead-out end 1A to prevent rainwater from directly entering the interior of the pipe cap 21. Simultaneously, the portion of the waterproof cover plate 22 is placed over the cable lead-out end 1A and at least covers the overlapping area of the pipe cap 21 and the cable lead-out end 1A to prevent rainwater from entering the interior of the pipe cap 21 from this overlapping area. In this embodiment, the entire pipe cap 21 is covered by the waterproof cover plate 22, and the length of the waterproof cover plate 22 is not less than the length of the pipe cap 21, maximizing the prevention of rainwater from entering the interior of the cable conduit 2, thereby preventing rainwater from flowing down the cable 01 into the electrical equipment 02 and improving the safety of the electrical equipment 02.
[0060] Please refer to Figures 3-5 , Figure 4 for Figure 3 A schematic diagram of the second angle of a cable duct; Figure 5 for Figure 4 A magnified view of a portion of region B in the middle.
[0061] In this embodiment, the waterproof cover plate 22 has downwardly bent portions 221 at both ends in the width direction, and there is a first distance between the two bent portions 221. There is a second distance between the two outer walls in the width direction of the cable lead-out end 1A. The first distance is not less than the second distance.
[0062] Depend on Figure 5 As can be seen, in this embodiment, the lower end of the bend 221 extends below the opening end of the pipe cap 21. Thus, the two bends 221 can play a certain sealing role, preventing rainwater from entering the interior of the cable pipe 2 from both sides of the width direction of the pipe cap 21, thereby maximizing the prevention of rainwater from entering the electrical equipment 02 and improving the safety of the electrical equipment 02. The first distance between the two bends 221 is not less than the second distance between the two outer walls of the cable lead-out end 1A in the width direction, so that the cable lead-out end 1A can also be covered by the waterproof cover plate 22. In some embodiments of this application, the first distance is slightly larger than the second distance, which facilitates the waterproof cover plate 22 to be placed above the cable lead-out end 1A, improving the installation convenience of the waterproof cover plate 22. Furthermore, the two bends 221 can also play a limiting role in the width direction, minimizing the positional displacement of the waterproof cover plate 22 relative to the cable lead-out end 1A and the pipe cap 21 in the width direction, so that the waterproof cover plate 22 can always reliably cover the entire pipe cap 21.
[0063] Please continue to refer to this. Figure 5 In this embodiment, the upper ends of the two end walls of the pipe cap 21 extending along the length direction have inwardly folded portions 211, and the cable pipe 2 also includes a connecting portion 23, which is connected between the upper side wall of the folded portion 211 and the lower side wall of the waterproof cover plate 22.
[0064] As configured above, the folding part 211 provides a connection position for the connecting part 23, increasing the connection area between the connecting part 23 and the pipe cap 21, and improving the connection reliability between the connecting part 23 and the pipe cap 21. The connecting part 23 is connected between the upper side wall of the folding part 211 and the lower side wall of the waterproof cover plate 22. On the one hand, it realizes the fixation of the waterproof cover plate 22 and the cable pipe 2, improves the connection reliability between the waterproof cover plate 22 and the cable pipe 2, improves the installation position accuracy of the waterproof cover plate 22, and ensures that the waterproof cover plate 22 can always reliably cover the entire pipe cap 21. On the other hand, the connecting part 23 can seal the gap between the folding part 211 and the waterproof cover plate 22, preventing rainwater from entering the interior of the cable pipe 2 through the gap between the waterproof cover plate 22 and the cable pipe 2 as much as possible, and preventing rainwater from entering the electrical equipment 02 to the greatest extent, thereby improving the safety of the electrical equipment 02.
[0065] The length of the connecting part 23 is defined as the first length, and the length of the area of the pipe cap 21 exposed at the cable lead-out end 1A is defined as the second length. The first length is not less than the second length, so as to ensure that the area of the pipe cap 21 exposed at the cable lead-out end 1A is reliably sealed with the waterproof cover plate 22.
[0066] In some embodiments of this application, the connecting part 23 includes a foam strip, and the upper side wall of the folding part 211 and the lower side wall of the waterproof cover plate 22 are bonded and fixed by the foam strip.
[0067] During the assembly of the cable tray 1 and the cable conduit 2, the conduit cap 21 is usually inserted into the cable lead-out end 1A first, and then the two ends of the waterproof cover plate 22 are supported on the cable lead-out end 1A, so that the waterproof cover plate 22 covers the entire conduit cap 21 along its length. Since the conduit cap 21 is inserted into the cable lead-out end 1A, the upper side wall of the folded part 211 is lower than the upper outer side wall of the cable lead-out end 1A, thus there is a certain gap between the upper side wall of the folded part 211 and the lower side wall of the waterproof cover plate 22. The foam strip has foaming properties and can have a certain height. The specific height of the foam strip can be set. The distance between the upper sidewall of the folding part 211 and the upper outer sidewall of the cable lead-out end 1A is set to be greater than the distance between the upper sidewall of the folding part 211 and the upper outer sidewall of the cable lead-out end 1A. Thus, in the natural state, the lower end of the foam strip is bonded to the upper sidewall of the folding part 211, and the upper contour of the foam strip is higher than the upper outer sidewall of the cable lead-out end 1A. During the process of the waterproof cover plate 22 being supported by the two ends of the cable lead-out end 1A, the upper sidewall of the folding part 211 and the lower sidewall of the waterproof cover plate 22 will gradually squeeze the foam strip, ensuring reliable bonding between the foam strip and the upper sidewall of the folding part 211, and between the foam strip and the lower sidewall of the waterproof cover plate 22, thereby improving the sealing reliability of the waterproof cover plate 22 and the cable duct 2.
[0068] Specifically, the foam strip can be a polymer foam strip, a silicone rubber foam strip, etc.
[0069] In some other embodiments of this application, the connecting part 23 may also include a support block made of a flexible material, such as rubber. The support block has a certain height, and the lower side wall of the support block is connected to double-sided adhesive and is connected to the upper side wall of the folding part 211 through double-sided adhesive. The upper side wall of the support block is also connected to double-sided adhesive. During the assembly of the waterproof cover 22, the lower side wall of the waterproof cover 22 and the double-sided adhesive on the upper side wall of the support block are bonded together, and the support block is squeezed to ensure the reliability of the connection between the waterproof cover 22 and the cable pipe 2.
[0070] Please continue to refer to this. Figure 2 and Figure 4In this embodiment, the sidewalls of the cable lead-out end 1A and the cable entry end 2A in the width direction are respectively provided with connection holes. The wiring mechanism also includes a connector 4, which passes through the corresponding connection hole to connect the cable lead-out end 1A and the cable entry end 2A.
[0071] As set up above, the cable lead-out end 1A and the cable inlet end 2A are fixed by connector 4, which is simple in structure, reliable in connection, convenient in operation, and more feasible in process.
[0072] Among them, the connector 4 can be a structure of connecting bolt and fixing nut. During installation, the connecting bolt is passed through the connecting holes of the cable lead-out end 1A and the cable entry end 2A in sequence. The head of the connecting bolt abuts against one of the cable lead-out end 1A and the cable entry end 2A. The connecting bolt and the fixing nut are threaded together. The fixing nut abuts against the other of the cable lead-out end 1A and the cable entry end 2A, thereby fixing the cable lead-out end 1A and the cable entry end 2A.
[0073] Depend on Figure 2 As can be seen, in this embodiment, the cable lead-out end 1A and the cable entry end 2A are fixed by two connectors 4. In practice, the number of connectors 4 is not limited, as long as the connection reliability between the cable lead-out end 1A and the cable entry end 2A can be guaranteed, and the number of connectors 4 can be at least one.
[0074] Please continue to refer to this. Figure 3 In this embodiment, the cable conduit 2 further includes:
[0075] The pipe frame 23 extends along the height direction, and the interior of the pipe frame 23 forms part of the structure of the second cable guide cavity 2a. The upper opening of the pipe frame 23 is connected to the lower opening of the pipe cap 21.
[0076] The pipe seat 25 extends along the height direction. The interior of the pipe seat 25 forms part of the structure of the second cable guide cavity 2a. The upper opening of the pipe seat 25 is connected to the lower opening of the pipe bracket 23. The lower end of the pipe seat 25 forms the cable outlet end 2B.
[0077] As set up above, the cable 01 entering the cable conduit 2 will extend downward under the guidance of the conduit cap 21, the conduit bracket 23 and the conduit seat 25, and extend out from the port of the cable outlet end 2B to electrically connect with the connection end of the electrical equipment 02 to supply power to the electrical equipment 02.
[0078] Among them, electrical equipment 02 can be electrical equipment that requires power supply, such as car chargers.
[0079] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.
Claims
1. A wiring mechanism, characterized in that, include: The cable tray (1) located near the power generation side has a first cable guide cavity (1a) formed inside the cable tray (1) and has a cable lead-out end (1A). A cable conduit (2) near the power supply side, the interior of the cable conduit (2) forms a second cable guide cavity (2a), the cable conduit (2) has a cable inlet end (2A), the cable inlet end (2A) is at least partially inserted into the interior of the cable outlet end (1A), with the port (O) of the cable inlet end (2A) as the boundary, the bottom wall of the cable outlet end (1A) located in front of the cable inlet end (2A) is lower than the bottom wall of the cable inlet end (2A); In the extension direction of the cable (01), the direction closer to the power generation side is defined as "front" and the direction closer to the power consumption side is defined as "back".
2. The wiring mechanism according to claim 1, characterized in that, The interior of the cable lead-out end (1A) forms a drainage channel (1b) below the cable inlet end (2A).
3. The wiring mechanism according to claim 2, characterized in that, The wiring mechanism also includes: Support member (3) is supported between the lower inner wall of the cable lead-out end (1A) and the lower outer wall of the cable inlet end (2A).
4. The wiring mechanism according to claim 3, characterized in that, The support member (3) has a flow hole inside, which extends along the extension direction of the cable lead-out end (1A).
5. The wiring mechanism according to any one of claims 1-4, characterized in that, The cable conduit (2) includes: Pipe cap (21), the pipe cap (21) has the cable inlet end (2A), the upper end of the pipe cap (21) is an open end, and the pipe cap (21) is partially inserted into the cable outlet end (1A); A waterproof cover plate (22) is partially placed over the area of the pipe cap (21) exposed above the cable lead-out end (1A), and partially placed over the cable lead-out end (1A), and at least covers the overlapping area of the pipe cap (21) and the cable lead-out end (1A).
6. The wiring mechanism according to claim 5, characterized in that, The waterproof cover (22) has downward bending portions (221) at both ends in the width direction, and there is a first distance between the two bending portions (221). There is a second distance between the two outer walls of the cable lead-out end (1A) in the width direction. The first distance is not less than the second distance.
7. The wiring mechanism according to claim 5, characterized in that, The pipe cap (21) has an inwardly folded portion (211) at the upper end of the two end walls extending along the length direction. The cable pipe (2) also includes a connecting portion (23), which is connected between the upper side wall of the folded portion (211) and the lower side wall of the waterproof cover plate (22).
8. The wiring mechanism according to claim 7, characterized in that, The connecting part (23) includes a foam strip, and the upper side wall of the folding part (211) and the lower side wall of the waterproof cover plate (22) are bonded and fixed by the foam strip.
9. The wiring mechanism according to claim 5, characterized in that, The cable lead-out end (1A) and the cable inlet end (2A) are respectively provided with connection holes in the width direction of the sidewalls. The wiring mechanism also includes a connector (4), which passes through the corresponding connection hole to connect the cable lead-out end (1A) and the cable inlet end (2A).
10. The wiring mechanism according to claim 5, characterized in that, The cable conduit (2) also includes: The pipe frame (24) extends along the height direction, and the interior of the pipe frame (24) forms part of the structure of the second cable guide cavity (2a). The upper opening of the pipe frame (24) is connected to the lower opening of the pipe cap (21). The pipe seat (25) extends along the height direction. The interior of the pipe seat (25) forms part of the structure of the second cable guide cavity (2a). The upper opening of the pipe seat (25) is connected to the lower opening of the pipe bracket (24). The lower end of the pipe seat (25) forms the cable outlet end (2B).