Cable perforation structure and electrical equipment

Abstract

The embodiment of the invention provides a cable perforation structure and electrical equipment, relates to the technical field of electrical equipment, and aims to solve the problem that the sealing performance between cables and between a cable and the inner wall of a cable inlet and outlet cannot be ensured. The electrical device includes a housing, a cable perforation structure, a plurality of cables, and a sealing material layer. The housing is provided with a cable inlet and outlet. And the cable perforation structure is hermetically connected with the shell through the cable inlet and outlet. A through hole penetrating through the cable penetrating hole structure is formed in the cable penetrating hole structure. In the extending direction of the through hole, the through hole is provided with a first opening and a second opening which are communicated, and the area of the second opening is smaller than that of the first opening. A plurality of cables pass through the through holes. The sealing material layer is filled in gaps among the plurality of cables and gaps between the cables and the inner wall of the through hole.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to a cable penetration structure and electrical equipment. Background Art

[0002] Currently, many cabinet-type, box-type or box-type electrical equipment have cable inlets and outlets. Since moisture or animals may pass through the cable inlets and outlets, the cable inlets and outlets need to be sealed to prevent moisture, animals, etc. from entering the cabinet-type, box-type or box-type electrical equipment and causing them to malfunction.

[0003] When there are multiple cables, there are gaps between the cables and the sealing cannot be guaranteed. This allows moisture to enter the box-type or box-type electrical equipment and affect its normal operation. Summary of the Invention

[0004] The purpose of this application is to provide a cable penetration structure and electrical equipment for improving the sealing of cable inlet and outlet ports while improving the sealing consistency.

[0005] According to a first aspect of an embodiment of the present application, an electrical device is provided, comprising a housing, a cable perforation structure, a plurality of cables, and a sealing material layer. A cable inlet and outlet port is provided on the housing. The cable perforation structure is sealed and connected to the housing through the cable inlet and outlet port. A through hole is provided on the cable perforation structure, penetrating the cable perforation structure. Along the extension direction of the through hole, the through hole has a first opening and a second opening that are connected, and the area of ​​the second opening is smaller than the area of ​​the first opening. A plurality of cables pass through the through hole. The sealing material layer fills the gaps between the plurality of cables, and the gaps between the cables and the inner wall of the through hole.

[0006] In the electrical equipment provided in the embodiment of the present application, a through-hole is provided on the cable perforation structure. After multiple cables pass through the through-holes of the cable perforation structure, a sealing material is filled into the through-hole from the first opening. At this time, the cable perforation structure can accommodate the sealing material. Under the action of gravity or the force applied by the staff, the sealing material flows between the cables and between the cables and the inner wall of the through-hole, thereby forming a sealing material layer, and ensuring that the sealing material layer can be filled between the cables and between the cables and the inner wall of the through-hole. Because the area of ​​the second opening is smaller than the area of ​​the first opening, that is, the second opening is smaller, the sealing material is not easy to flow out from the second opening. Under the support of the cable perforation structure, the probability of the sealing material detaching from the cable due to gravity is reduced, and a gap is avoided between the sealing material and the cable after solidification, thereby ensuring the sealing between the cables and between the cables and the cable perforation structure. After the cables, the cable perforation structure and the sealing material layer are assembled, the cable perforation structure is set at the cable inlet and outlet, and the cable perforation structure is sealed and connected to the housing through the cable inlet and outlet. Compared to applying sealing putty directly to the cable inlets and outlets, the sealing material and cables, once fixed to the cable perforation structure, form a single integrated structure, making it easier to install at the inlet and outlet and achieving a sealed connection with the inner wall of the inlet and outlet. This improves the sealing between cables and between the cables and the inner wall of the inlet and outlet, enhancing the sealing of the inlet and outlet. Furthermore, construction personnel only need to pass the cables through the through-holes and then fill the holes with sealing material, which is a simple operation that ensures construction quality and, in turn, ensures consistent sealing at different inlets and outlets.

[0007] In some embodiments of the present application, the first opening faces the inside of the shell. After the cable perforation structure, the cable, and the sealing material layer are assembled, the cable perforation structure is connected to the shell through the cable inlet and outlet, and the cable inlet and outlet are directed toward the inside of the shell. At this time, the first opening with a larger area is located inside the shell, and the second opening with a smaller area is located outside the shell. The sealing material layer in the through hole is in contact with the external atmosphere through the second opening. The area of ​​the second opening is smaller, that is, the contact area of ​​the sealing material layer with the external atmosphere is smaller, thereby slowing down the aging speed of the sealing material layer, and improving the problem that the sealing performance at the cable inlet and outlet cannot be guaranteed due to the gap between the sealing material layer and the cable or the cable perforation structure caused by aging and cracking of the sealing material layer.

[0008] In some embodiments of the present application, the cable perforation structure includes a support tube and an elastic abutment. One end of the support tube has a first opening. One end of the elastic abutment is connected to the inner wall of the support tube, and the other end of the elastic abutment encloses at least a portion of a second opening. The elastic abutment ensures that the area of ​​the second opening is smaller than the first opening, reducing the cable accommodation space at the second opening. This in turn slows the flow of sealing material injected into the through-hole at the second opening. This allows the sealing material layer formed after curing to remain between the cables at the second opening, thereby improving the sealing between the cables. Furthermore, the elastic deformation of the elastic abutment ensures that all cables can pass through the through-hole when there are many cables or they have large diameters. This allows the elastic abutment to abut the cables, thereby bringing the multiple cables closer together, reducing the distance between them and further slowing the flow of sealing material between them. This allows the sealing material layer to remain between the cables, thereby improving the sealing between them.

[0009] In some embodiments of the present application, the elastic abutment portion is a raised structure on the side facing away from the inner wall of the support tube. At this time, the elastic abutment portion provided on the inner wall of the support tube can further reduce the accommodation space of the cable at the second opening. Slow down the flow of the sealing material poured into the through hole at the second opening. Moreover, when there are many cables, multiple cables can be brought closer to each other to reduce the distance between cables. This slows down the flow of the sealing material poured into the through hole between cables. The sealing material layer formed during solidification of the sealing material can be retained between cables, thereby improving the sealing between cables and enhancing the sealing at the cable inlet and outlet.

[0010] In some embodiments of the present application, the elastic abutment is a sheet-like structure. The end of the elastic abutment facing away from the first opening is connected to the support tube, and there is a gap between the end of the elastic abutment facing the first opening and the inner wall of the support tube. At this time, since there is a gap between the elastic abutment and the inner wall of the support tube. The above gap can provide a certain deformation space, so that the elastic abutment can be deformed in the direction toward the inner wall of the support tube, ensuring that the elastic abutment has good deformation ability. In addition, it is ensured that when the number or diameter of cables are different, the cables can be arranged in the through hole, and at the same time, the distance between the cables is small, so that the cured sealing material layer can be retained between the cables, thereby improving the sealing performance at the cable inlet and outlet.

[0011] In some embodiments of the present application, the cable perforation structure includes at least two elastic abutment portions, and the at least two elastic abutment portions are arranged along the inner wall of the support tube on a plane perpendicular to the extension direction of the support tube. The at least two elastic abutment portions further reduce the area of ​​the second opening, slowing down the flow of the sealing material at the second opening. When there are many cables, the at least two elastic abutment portions can respectively abut and limit the cables at different positions, further ensuring that the distance between the cables is small, so that the cured sealing material layer can be retained between the cables, improving the sealing performance at the cable inlet and outlet.

[0012] In some embodiments of the present application, the support tube is a first hollow frustum-shaped structure, the outer diameter of the first end of the support tube is larger than the outer diameter of the second end of the support tube, and the inner diameter of the first end of the support tube is larger than the inner diameter of the second end of the support tube. The first opening is located at the first end of the support tube. That is, the inner diameter of the second end of the support tube away from the first opening is smaller than the inner diameter of the first end of the support tube. The space for accommodating cables at the second end of the support tube is smaller, thereby further reducing the flow rate of the sealing material between the cables at this location, ensuring that the cured sealing material layer can be retained between the cables, ensuring the sealing performance at this location, and improving the sealing performance at the cable inlet and outlet. In addition, the outer diameter of the first end of the support tube is larger than the outer diameter of the second end of the support tube, and the inner diameter of the first end of the support tube is larger than the inner diameter of the second end of the support tube, which can ensure that the thickness of the support tube is consistent or close at various locations. This is to facilitate processing and production.

[0013] In some other embodiments of the present application, the cable perforation structure includes an elastic abutment portion, which is a second hollow truncated cone-shaped structure, and the outer diameter of the first end of the elastic abutment portion is larger than the outer diameter of the second end of the elastic abutment portion. The above-mentioned through hole is opened on the elastic abutment portion, and the through hole passes through the elastic abutment portion. The first opening is located at the first end of the elastic abutment portion, and the second opening is located at the second end of the elastic abutment portion. When the number of cables is small or the diameter is small, it can be ensured that the part of the elastic abutment portion located at the second opening can abut against the cables to reduce the distance between the cables. When the number of cables is large or the diameter is large, the part of the elastic abutment portion located at the second opening undergoes elastic deformation, thereby expanding the second opening, ensuring that all cables can pass through the through hole, and even the entire elastic abutment portion is deformed, so that the first opening and the second opening are both enlarged, further increasing the number of cables that can be accommodated in the through hole. In this way, even when the number or diameter of cables is different, the cables can all be placed in the through-hole, and the elastic abutment part can abut against the cables to reduce the distance between the cables, thereby slowing down the flow of the sealing material poured into the through-hole between the cables. This ensures that the sealing material can be retained between the cables during the curing process, ensuring the sealing between the cables. In addition, the larger first opening is located at the first end of the elastic abutment part with a larger outer diameter, and the smaller first opening is located at the second end of the elastic abutment part with a smaller outer diameter, which can ensure that the thickness of the elastic abutment part is consistent or close at all locations. During production and processing, it is convenient to open a through-hole on the elastic abutment part.

[0014] In some further embodiments of the present application, the cable perforation structure includes an elastic abutment portion, a through hole is provided on the elastic abutment portion, and the through hole passes through the elastic abutment portion. The through hole has a first opening and a third opening at each end, respectively. Along the direction toward the axis of the through hole, the portion of the elastic abutment portion located between the first opening and the third opening protrudes toward the plurality of cables and abuts against the plurality of cables, and the portion of the elastic abutment portion abutting against the plurality of cables encloses a second opening. The portion of the elastic abutment portion located between the first opening and the third opening protrudes toward the plurality of cables, that is, the area of ​​the second opening enclosed by the portion abutting against the plurality of cables is smaller than the area of ​​the first opening, that is, the second opening is smaller, and the sealing material is not easy to flow out of the second opening. This allows the sealing material to be filled between the first opening and the second opening, thereby ensuring the sealing between cables and between cables and the cable perforation structure.

[0015] In some embodiments of the present application, the material of the elastic abutment portion includes at least one of rubber and resin. Rubber and resin have good elasticity, and the elastic abutment portion made of such materials has good elastic deformation properties, further ensuring that even when cables of different numbers or diameters are installed in the through-hole, the elastic abutment portion abuts against the cables.

[0016] In some embodiments of the present application, the cable perforation structure further includes a protrusion, which is disposed around the outer side wall of the elastic abutment portion and is connected to the elastic abutment portion. The protrusion is configured to sealably connect with a side port of the cable inlet and outlet. In this case, after the elastic abutment portion is inserted into the cable inlet and outlet, the end of the protrusion facing away from the elastic abutment portion is prevented from passing through the cable inlet and outlet. The protrusion is sealedly connected to a side port of the cable inlet and outlet, thereby limiting the elastic abutment portion and ensuring the seal between the cable perforation structure and the structure having the cable inlet and outlet.

[0017] In some embodiments of the present application, a protrusion is provided at the end of the elastic abutment portion having the first opening, and the protrusion is annular in shape. In this case, if the distance between the outer edge of the protrusion and the elastic abutment portion is small, the end of the protrusion facing away from the elastic abutment portion cannot pass through the cable access opening, thereby ensuring that the protrusion can be connected to the structure having the cable access opening. Furthermore, a protrusion with an annular structure is easier to manufacture and process.

[0018] In some embodiments of the present application, the material of the protrusion includes at least one of rubber and resin. The electrical device also includes a rigid part, the protrusion is located between the rigid part and the shell, and the protrusion is sealed and connected to the rigid part and the shell respectively. The hardness of the rigid part is greater than that of the protrusion. At this time, after the elastic abutment is extended into the cable inlet and outlet, the end of the protrusion that is away from the elastic abutment cannot pass through the cable inlet and outlet. Rubber and resin have good elasticity, and the protrusion made of this material has good elastic deformation performance. When the protrusion is connected to the rigid part and the shell respectively, the rigid part with greater hardness can generate an extrusion force on the protrusion, causing the protrusion to deform and then fit tightly against the shell, thereby ensuring the sealing between the protrusion and the shell.

[0019] In some embodiments of the present application, scale lines are provided on the inner wall of the through-hole, and the scale lines include grooves or protrusions engraved on the inner wall of the through-hole. The scale lines allow staff to observe the amount of sealing material poured into the through-hole, thereby ensuring that the amount of sealing material poured into the through-hole meets the requirements, reducing the gaps between cables and between cables and cable perforations that are not filled with sealing material, and reducing the occurrence of insufficient or excessive sealing material due to subjective misjudgment by staff, further improving the sealing and sealing consistency at the cable inlet and outlet, and avoiding waste of sealing material.

[0020] In some embodiments of the present application, the sealing material layer includes a sealant. The fluidity of the sealant is stronger than that of the sealing mud. After the cable passes through the through-hole, the second opening of the cable perforation structure is first directed toward the ground, and then the sealant is poured into the through-hole of the cable perforation structure from the first opening. Under the action of gravity, the sealant flows toward the second opening. Because the fluidity of the sealant is stronger than that of the sealing mud, the sealant can flow into the gaps between cables and between cables and the inner wall of the through-hole. Because the area of ​​the second opening is smaller than that of the first opening, that is, the second opening is smaller, the sealant is not easily separated from the cable by flowing out of the second opening due to gravity. As a result, the sealing material layer formed after the sealant solidifies can still be filled between cables and between cables and the cable perforation structure, reducing the gaps between cables and between cables and the inner wall of the through-hole that are not filled with the sealing material layer, ensuring the sealing between cables and between cables and the cable perforation structure, and improving the sealing at the cable inlet and outlet.

[0021] In some embodiments of the present application, the electrical device further comprises a blocking layer, which is located on a side of the sealing material layer facing the second opening, and covers at least a portion of the second opening. Before the sealing material solidifies, the blocking layer provided at the second opening can further limit the sealing material, thereby reducing the probability of the sealing material flowing out of the through-hole. After the sealing material solidifies, the amount of the sealing material layer that is finally formed fills the space between the cables and between the cables and the cable perforations, thereby improving the sealing effect and enhancing the sealing performance at the cable inlet and outlet.

[0022] A second aspect of the present application provides a cable penetration structure having a through hole extending therethrough, the through hole having a first opening and a second opening at each end, the second opening being smaller in area than the first opening. This cable penetration structure has the same technical effects as the cable penetration structure in electrical equipment provided in the aforementioned embodiments and is not further described here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a first type of electrical equipment provided in an embodiment of the present application;

[0024] Figure 2 A schematic structural diagram of a first cable perforation structure provided in an embodiment of the present application;

[0025] Figure 3 for Figure 2 The cable penetration structure shown is a schematic diagram of the assembly of the cable and the sealing material layer;

[0026] Figure 4 A schematic structural diagram of a second electrical device provided in an embodiment of the present application;

[0027] Figure 5 Schematic diagram of the assembly of the second cable perforation structure, cable and sealing material layer provided in an embodiment of the present application;

[0028] Figure 6 for Figure 5 A cross-sectional view in the L1-L2 direction;

[0029] Figure 7 A schematic diagram of the position of the second opening in the second cable perforation structure provided in an embodiment of the present application;

[0030] Figure 8 for Figure 5 Another cross-sectional view in the L1-L2 direction;

[0031] Figure 9 A top view of a third cable perforation structure provided in an embodiment of the present application;

[0032] Figure 10 for Figure 9 Cross-section in the O1-O2 direction;

[0033] Figure 11 for Figure 9 The cable penetration structure and cable assembly diagram shown;

[0034] Figure 12 for Figure 11 Cross-section in the P1-P2 direction;

[0035] Figure 13 A schematic diagram of the assembly of the fourth cable perforation structure, the cable, and the sealing material layer provided in an embodiment of the present application;

[0036] Figure 14 A schematic structural diagram of a third electrical device provided in an embodiment of the present application;

[0037] Figure 15 for Figure 14 Enlarged view at M;

[0038] Figure 16 A schematic structural diagram of a fifth cable perforation structure provided in an embodiment of the present application;

[0039] Figure 17 for Figure 16 The cable penetration structure shown is a schematic diagram of the assembly of the cable and the sealing material layer;

[0040] Figure 18 for Figure 17 Cross-section in the Q1-Q2 direction;

[0041] Figure 19A schematic diagram of the assembly of the sixth cable perforation structure, the cable, and the sealing material layer provided in an embodiment of the present application;

[0042] Figure 20 for Figure 19 Cross-section in the N1-N2 direction;

[0043] Figure 21 A partial schematic diagram of a fourth electrical device provided in an embodiment of the present application;

[0044] Figure 22 A schematic structural diagram of a seventh cable perforation structure provided in an embodiment of the present application;

[0045] Figure 23 Schematic diagram of the assembly of the eighth cable perforation structure, the cable, the sealing material layer, and the blocking layer provided in an embodiment of the present application;

[0046] Figure 24 A schematic structural diagram of a fifth electrical device provided in an embodiment of the present application;

[0047] Figure 25 A structural diagram of the sixth electrical device provided in an embodiment of the present application.

[0048] Reference numerals:

[0049] 01-electrical equipment; 11-housing; 111-cable inlet and outlet; 112-first connecting hole; 12-cable; 13-cable perforation structure; 131-through hole; 1311-first opening; 1312-second opening; 1313-third opening; 132-support tube; 132A-first end of the support tube; 132B-second end of the support tube; 133-elastic abutment; 133C-first end of the elastic abutment; 133D-second end of the elastic abutment; 134-protrusion; 1341-second connecting hole; 135-scale line; 14-sealing material layer; 15-connecting piece; 16-rigid piece; 161-opening; 162-third connecting hole; 17-sealing layer. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0051] Hereinafter, the terms "first," "second," "third," etc., are used for descriptive convenience only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first," "second," "third," etc., may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0052] In this application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed mechanical connection, a detachable mechanical connection, or an integrated connection; or, "connection" can be a direct connection or an indirect connection through an intermediate medium.

[0053] In the embodiments of this application, words such as "exemplarily" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplarily" is intended to present the relevant concepts in a concrete manner.

[0054] In the drawings of the embodiments of the present application, components are represented by guide lines with arrows; parts are represented by guide lines only; and hollow structures such as openings and holes are represented by curved guides.

[0055] The embodiment of the present application provides an electrical device 01. Figure 1 As shown, electrical device 01 may include a housing 11. Housing 11 is used to protect devices disposed within housing 11. Electrical device 01 may include a cabinet, a chassis, a box, or an energy storage container. Housing 11 may be a cabinet, a chassis, a box, or an energy storage container.

[0056] In order to complete the energy supply or signal exchange between the device in the housing 11 and the external device, continue as follows Figure 1 As shown, the electrical device 01 may further include a cable 12. The housing 11 is provided with a cable inlet and outlet 111. One end of the cable 12 is located inside the housing 11, and the other end passes through the cable inlet and outlet 111 and is located outside the housing 11. The device inside the housing 11 can be connected to an external device via the cable 12.

[0057] Furthermore, in order to ensure that the device in the housing 11 and the external device can perform multiple energy supplies or multiple signal exchanges, Figure 1 As shown, the electrical device 01 may further include a plurality of cables 12. For example, the number of cables 12 may be 2, 3, 5, 7, 10, and so on.

[0058] Alternatively, in other embodiments of the present application, the number of cables 12 may also be one.

[0059] Since the cable inlet and outlet opening 111 is susceptible to moisture or animals, it is necessary to seal the cable inlet and outlet opening 111 to prevent moisture, animals, etc. from entering the housing 11. When the sealing mud is applied to the cable inlet and outlet opening 111 by the staff for sealing, a gap is easily formed between the sealing mud and the cable 12 under the action of gravity during the curing process of the sealing mud. Moreover, the application and fixation of the sealing mud requires a high level of construction ability of the staff. When there are multiple cables 12, it is difficult for the staff to ensure that the sealing mud can fill the gaps between the cables 12. In other words, the sealing performance of the cable inlet and outlet opening 111 cannot be guaranteed.

[0060] To solve the above problem, continue as Figure 1 As shown, the electrical device 01 may further include a cable perforation structure 13 and a sealing material layer 14. The cable perforation structure 13 is sealed to the housing 11 through the cable inlet and outlet 111, thereby preventing moisture, animals, etc. from entering the housing 11 through the space between the cable perforation structure 13 and the housing 11.

[0061] The sealed connection may be achieved by the cable penetration structure 13 and the housing 11 being sealed by a colloid; or the cable penetration structure 13 and the housing 11 being sealed by abutting.

[0062] On this basis, if Figure 2 As shown, the cable through-hole structure 13 is provided with a through-hole 131 penetrating the cable through-hole structure 13. Figure 3As shown, multiple cables 12 pass through the through-hole 131. A sealing material layer 14 is disposed within the through-hole 131, and the sealing material layer 14 fills the gaps between the multiple cables 12, as well as the gaps between the cables 12 and the inner wall of the through-hole 131. Furthermore, along the extension direction of the through-hole 131, the through-hole 131 has a first opening 1311 and a second opening 1312 that are connected. During installation, the cables 12 can first be passed through the through-hole 131, and then the sealing material can be filled into the through-hole 131 of the cable through-hole structure 13 from the first opening 1311, thereby forming the sealing material layer 14. At this time, the cable through-hole structure 13 can support the sealing material. Under the action of gravity or the force applied by the operator, the sealing material flows into the gaps between the cables 12 and the gaps between the cables 12 and the inner wall of the through-hole 131, thereby allowing the sealing material layer 14 to fill the gaps between the cables 12 and the gaps between the cables 12 and the inner wall of the through-hole 131. In addition, the area of ​​the second opening 1312 is smaller than that of the first opening 1311. That is, the second opening 1312 is smaller, and the sealing material is not easy to flow out of the second opening 1312. Under the support of the cable perforation structure 13, the probability of the sealing material detaching from the cable 12 due to gravity is reduced, and the occurrence of gaps between the sealing material layer 14 formed after the sealing material solidifies and the cable 12 is alleviated, thereby ensuring the sealing performance between cables 12 and cables 12, and between cables 12 and the cable perforation structure 13. After the cable 12, the cable perforation structure 13 and the sealing material layer 14 are assembled, the cable perforation structure 13 is set at the cable inlet and outlet 111 and sealed with the shell 11. Compared with the solution of using only sealing mud for sealing, after the sealing material layer 14 and the cable 12 are fixed on the cable perforation structure 13, they are combined into an integral structure, which is easier to install at the cable inlet and outlet 111 and easier to seal with the shell 11. This improves the sealing between the cables 12 and between the cables 12 and the inner wall of the cable inlet and outlet 111, thereby enhancing the sealing at the cable inlet and outlet 111 and preventing moisture, animals, etc. from entering the housing 11. In addition, the construction personnel only need to pass the cable 12 through the through hole 131 and then fill the through hole 131 with sealing material. This operation is easy, can ensure the construction quality, and further ensure the sealing consistency of different cable inlet and outlet ports 111.

[0063] For example, when sealing the cable inlet and outlet ports 111 at different locations, sealing material can be poured into the through holes 131 of the different cable penetration structures 13 until the through holes are completely filled with the sealing material to ensure consistent sealing. Alternatively, sealing material can be poured into the through holes 131 of the different cable penetration structures 13 so that the volume percentage of the space within the through holes occupied by the sealing material is the same or similar to ensure consistent sealing.

[0064] In some embodiments of the present application, Figure 3 As shown, the sealing material layer 14 may include a sealant. The fluidity of the sealant is stronger than that of the sealing mud. During the installation process, after the cable 12 passes through the through-hole 131, the second opening 1312 of the cable perforation structure 13 is first directed toward the ground, and then the sealant is poured into the through-hole 131 of the cable perforation structure 13 from the first opening 1311. Under the action of gravity, the sealant flows toward the second opening 1312. Because the fluidity of the sealant is stronger than that of the sealing mud, it is ensured that the sealant can flow into the gaps between the cables 12 and the cables 12 and between the cables 12 and the inner wall of the through-hole 131. Because the area of ​​the second opening 1312 is smaller than the area of ​​the first opening 1311, that is, the second opening 1312 is smaller, the sealant is not easy to flow out of the second opening 1312 due to gravity and detach from the cable. Therefore, after the sealant is cured, the sealant can still be filled between the cables 12 and between the cables 12 and the cable perforation structure 13, thereby improving the sealing between the cables 12 and between the cables 12 and the cable perforation structure 13.

[0065] Alternatively, in some other embodiments of the present application, the sealing material layer 14 may also include sealing putty. A worker may apply force to the sealing putty, and with the support of the cable penetration structure 13, squeeze the sealing putty into the gaps between the cables 12 and between the cables 12 and the inner wall of the through-hole 131, thereby ensuring sealing performance between the cables 12 and between the cables 12 and the cable penetration structure 13.

[0066] Further, continue as Figure 1 , the first opening 1311 can face the inside of the shell. After the cable perforation structure 13, the cable 12 and the sealing material layer 14 are assembled, the cable perforation structure 13 is connected to the shell 11 through the cable inlet and outlet port 111, and the cable inlet and outlet port 111 is directed toward the inside of the shell 11. At this time, the first opening 1311 with a larger area is located inside the shell 11, and the second opening 1312 with a smaller area is located outside the shell 11. The sealing material layer 14 in the through hole 131 is in contact with the external atmosphere through the second opening 1312. The area of ​​the second opening 1312 is smaller, that is, the contact area of ​​the sealing material layer 14 with the external atmosphere is smaller, thereby slowing down the aging speed of the sealing material layer 14, and improving the problem that the sealing material layer 14 and the cable 12 or the cable perforation structure 13 are caused by aging and cracking, resulting in a gap between the sealing material layer 14 and the cable 12 or the cable perforation structure 13, which makes the sealing at the cable inlet and outlet port 111 unable to be guaranteed.

[0067] Of course, the first opening 1311 may also face outside the housing.

[0068] The structure of the cable perforation structure 13 is described in detail below. Figure 4 In the electrical device 01 shown, the cable penetration structure 13 can be as follows Figure 5 and Figure 6 The support tube 132 and the elastic abutment 133 are shown. One end of the support tube 132 has a first opening 1311. One end of the elastic abutment 133 is connected to the inner wall of the support tube 132, as shown in FIG. Figure 7 As shown, the other end of the elastic abutment portion 133 encloses at least a portion of the second opening 1312. At this point, the elastic abutment portion 133 ensures that the area of ​​the second opening 1312 is smaller than the first opening 1311, reducing the space required to accommodate the cables 12 at the second opening 1312. This in turn slows the flow of the sealing material injected into the through-hole 131 at the second opening 1312. This allows the sealing material layer 14 formed after curing to remain between the cables 12 at the second opening 1312, thereby improving the sealing between the cables 12. Furthermore, the elastic deformation of the elastic abutment portion 133 ensures that all cables 12 can pass through the through-hole 131 when there are many cables 12 or when their diameters are large. At this point, the elastic abutment portion 133 can abut against the cables 12, thereby bringing the multiple cables 12 closer together, reducing the distance between them and further slowing the flow of the sealing material between them. The sealing material layer 14 is retained between the cables 12 , thereby improving the sealing performance between the cables 12 .

[0069] Of course, it is understandable that the size of the cable penetration structure 13 may also be different depending on the size of the cable inlet and outlet opening 111 and the number and diameter of the cables 12 that need to pass through.

[0070] For example, continue as Figure 6 As shown, one end of the elastic abutment portion 133 is connected to the other end of the support tube 132 away from the first opening 1311. Alternatively, as another example, Figure 8 As shown, the elastic abutting portion 133 is located in the supporting tube 132 , and along the extending direction of the supporting tube 132 , the other end of the supporting tube 132 away from the first opening 1311 protrudes from the elastic abutting portion 133 .

[0071] Further, continue as Figure 5 and Figure 6As shown, the elastic abutment portion 133 is a raised structure that protrudes toward the side of the inner wall away from the support tube 132. At this time, the elastic abutment portion 133 provided on the inner wall of the support tube 132 can further reduce the accommodation space of the cable 12 at the second opening 1312, and slow down the flow of the sealing material poured into the through hole 131 at the second opening 1312. Moreover, when there are many cables 12, multiple cables 12 can be brought closer to each other to reduce the distance between cables 12 and cables 12. This slows down the flow of the sealing material poured into the through hole 131 between cables 12 and cables 12. This allows the sealing material to remain between cables 12 and cables 12 when it is solidified to form a sealing material layer 14, thereby improving the sealing between cables 12 and cables 12 and enhancing the sealing at the cable inlet and outlet 111.

[0072] Further, continue as Figure 5 and Figure 6 As shown, the elastic abutment portion 133 may be a sheet-like structure. The end of the elastic abutment portion 133 facing away from the first opening 1311 is connected to the support tube 132, and a gap exists between the end of the elastic abutment portion 133 facing the first opening 1311 and the inner wall of the support tube 132. In the aforementioned sheet-like structure, the remaining portion, except for the portion connected to the support tube 132, is referred to as "the end of the elastic abutment portion 133 facing the first opening 1311." This gap provides a sufficient deformation space, allowing the elastic abutment portion 133 to deform toward the inner wall of the support tube 132, thereby ensuring that the elastic abutment portion 133 has good deformation capacity. This ensures that even if the number or diameter of cables 12 varies, all cables 12 can be placed within the through-hole 131. At the same time, the spacing between cables 12 is kept small, allowing the cured sealing material layer 14 to remain between the cables 12, thereby improving the sealing performance at the cable inlet and outlet 111.

[0073] Alternatively, in the embodiment of the present application, there is no gap between the elastic abutment portion 133 and the support tube 132, and the material of the elastic abutment portion 133 can be rubber, resin, etc. Rubber and resin have good elasticity, and the elastic abutment portion 133 has good deformation ability. Through the deformation of the material of the elastic abutment portion 133, multiple cables 12 can be accommodated.

[0074] In addition, continue as Figure 5As shown, the cable perforation structure 13 may include at least two elastic abutment portions 133, and the at least two elastic abutment portions 133 are arranged along the inner wall of the support tube 132 on a plane perpendicular to the extension direction of the support tube 132. The at least two elastic abutment portions 133 further reduce the area of ​​the second opening 1312, slowing down the flow of the sealing material at the second opening 1312. When there are many cables 12, the at least two elastic abutment portions 133 can respectively abut and limit the cables 12 at different positions, further ensuring that the distance between the cables 12 is small, so that the cured sealing material layer 14 can be retained between the cables 12, thereby improving the sealing performance at the cable inlet and outlet 111.

[0075] The above embodiment Figure 5 The examples shown in the figure all take the cable perforation structure 13 including four elastic abutment portions 133 as an example. In other embodiments of the present application, the number of elastic abutment portions 133 may also be other numbers. For example, the number of elastic abutment portions 133 may be 1, 2, 3, 5, etc.

[0076] In order to make the support tube 132 abut against the inner wall of the cable inlet and outlet 111 and seal it. Figure 9 、 Figure 10 、 Figure 11 and Figure 12 As shown, the support tube 132 is a first hollow frustum-shaped structure. The outer diameter of the first end 132A of the support tube is larger than the outer diameter of the second end 132B of the support tube, and the inner diameter of the first end 132A of the support tube is larger than the inner diameter of the second end 132B of the support tube. The first opening 1311 is located at the first end 132A of the support tube. In other words, the inner diameter of the second end of the support tube 132, which is away from the first opening 1311, is smaller than the inner diameter of the first end 132A of the support tube. The space for accommodating the cable 12 at the second end 132B of the support tube is smaller, thereby further reducing the flow rate of the sealing material between the cables 12 at this location, ensuring that the cured sealing material layer 14 can be retained between the cables 12, ensuring the sealing performance at this location, and improving the sealing performance at the cable inlet and outlet 111. In addition, the outer diameter of the first end 132A of the support tube is larger than the outer diameter of the second end 132B of the support tube, and the inner diameter of the first end 132A of the support tube is larger than the inner diameter of the second end 132B of the support tube. This ensures that the thickness of the support tube 132 is consistent or similar at all locations, facilitating processing and production.

[0077] The above Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 or Figure 12 In any embodiment, the support tube 132 can abut against the inner wall of the cable inlet and outlet port 111 to achieve a sealed connection between the cable penetration structure 13 and the housing 11 .

[0078] In addition, if Figure 13 As shown, the cable penetration structure 13 may further include a protrusion 134, which is arranged around the outer wall of the support tube 132 and is connected to the support tube 132. One end of the protrusion 134 away from the elastic abutment 133 is located on the side of the inner wall of the cable inlet and outlet 111 away from the elastic abutment 133, and the protrusion 134 is in contact with the housing 11 (as shown in FIG. Figure 4 After the support tube 132 is inserted into the cable inlet and outlet 111, the protrusion 134 cannot pass through the cable inlet and outlet 111. At this time, the protrusion 134 can be sealed with one side of the housing 11 to ensure the sealing performance between the cable penetration structure 13 and the housing 11. Alternatively, in other embodiments, the electrical device 01 can be as follows Figure 14 and Figure 15 As shown, the cable penetration structure 13 of the electrical device 01 can be as follows Figure 16 As shown, it includes an elastic abutment portion 133. The elastic abutment portion 133 can be a second hollow truncated cone structure, and the outer diameter of the first end 133C of the elastic abutment portion is larger than the outer diameter of the second end 133D of the elastic abutment portion. The aforementioned through hole 131 is opened on the elastic abutment portion 133, and the through hole 131 passes through the elastic abutment portion 133. The first opening 1311 is located at the first end 133C of the elastic abutment portion, and the second opening 1312 is located at the second end 133D of the elastic abutment portion. Figure 17 and Figure 18As shown, when the number of cables 12 is small or the diameter is small, the portion of the elastic abutment 133 located at the second opening 1312 can abut against the cables 12, thereby reducing the distance between the cables 12. When the number of cables 12 is large or the diameter is large, the portion of the elastic abutment 133 located at the second opening 1312 undergoes elastic deformation, thereby expanding the second opening 1312 and ensuring that all cables 12 can pass through the through-hole 131. The entire elastic abutment 133 may even deform, enlarging both the first opening 1311 and the second opening 1312, further increasing the number of cables 12 that can be accommodated within the through-hole 131. In this way, even if the number of cables 12 or the diameter are different, all cables 12 can be disposed within the through-hole 131, and the elastic abutment 133 abuts against the cables 12, thereby reducing the distance between the cables 12 and slowing the flow of the sealing material filled in the through-hole 131 between the cables 12. This allows the sealing material layer 14 to remain between the cables 12 during the curing process, improving the sealing between the cables 12. Furthermore, the larger first opening 1311 is located at the first end 133C of the elastic abutting portion with a larger outer diameter, while the smaller first opening 1311 is located at the second end 133D of the elastic abutting portion with a smaller outer diameter. This ensures that the thickness of the elastic abutting portion 133 is consistent or similar across the entire portion. This facilitates the creation of through-holes 131 in the elastic abutting portion 133 during production.

[0079] Alternatively, in other embodiments, Figure 19 and Figure 20 As shown, the cable penetration structure 13 includes an elastic abutment portion 133. A through hole 131 is formed on the elastic abutment portion 133 and extends through the elastic abutment portion 133. Through hole 131 has a first opening 1311 and a third opening 1313 at either end. Along the axis of through hole 131, the portion of the elastic abutment portion 133 located between the first and third openings 1311 and 1313 protrudes toward the cables 12 and abuts against them. The portion of the elastic abutment portion 133 abutting the cables 12 defines a second opening 1312. The portion of the elastic abutment portion 133 located between the first and third openings 1311 and 1313 protrudes toward the cables 12. In other words, the area of ​​the second opening 1312 defined by the portion of the elastic abutment portion 133 abutting the cables 12 is smaller than that of the first opening 1311. This means that the sealing material is less likely to flow out of the second opening 1312. The sealing material can be filled between the first opening 1311 and the second opening 1312 to ensure sealing between the cables 12 and between the cables 12 and the cable penetration structure 13 .

[0080] On this basis, if Figure 14 or Figure 19 As shown, the material of the elastic contact portion 133 includes at least one of rubber and resin. Rubber and resin have good elasticity, and the elastic contact portion 133 made of such materials has good elastic deformation properties, further ensuring that the cables 12 can be placed in the through hole 131 with different numbers and diameters of cables 12, and the elastic contact portion 133 abuts against the cables 12.

[0081] In addition, continue as Figure 18 As shown, the cable penetration structure 13 may further include a protrusion 134, which is arranged around the outer side wall of the elastic abutment portion 133 and is connected to the elastic abutment portion 133. Figure 15 As shown, the end of the protrusion 134 facing away from the elastic abutment 133 is located on the side of the inner wall of the cable inlet and outlet 111 facing away from the elastic abutment 133, and the protrusion 134 is sealedly connected to the housing 11 at a side end of the cable inlet and outlet 111. After the elastic abutment 133 is inserted into the cable inlet and outlet 111, the end of the protrusion 134 facing away from the elastic abutment 133 cannot pass through the cable inlet and outlet 111. At this time, after the protrusion 134 is sealedly connected to the housing 11 at a side end of the cable inlet and outlet 111, the elastic abutment 133 is limited in position, while ensuring the sealing between the cable perforation structure 13 and the housing 11.

[0082] Further, continue as Figure 15 As shown, the housing 11 may be provided with a first connection hole 112, and the protrusion 134 may be provided with a second connection hole 1341. The electrical device 01 may further include a connector 15, one end of which passes through the second connection hole 1341 and the first connection hole 112 in sequence and is connected to the housing 11. For example, the first connection hole 112 is a threaded hole, and the connector 15 is a bolt that passes through the second connection hole 1341 and is threadedly connected to the threaded hole. Alternatively, the first connection hole 112 is a pin hole, and the connector 15 is a pin that passes through the second connection hole 1341 and is interference fit with the pin hole, thereby achieving connection between the protrusion 134 and the housing 11.

[0083] Alternatively, in other embodiments of the present application, the protrusion 134 may also be bonded to the housing 11 by adhesive.

[0084] In addition, continue as Figure 18 As shown, the protrusion 134 can be provided at one end of the elastic contact portion 133 having the first opening 1311, and the protrusion 134 is a circular ring structure. In this case, when the distance between the outer edge of the protrusion 134 and the elastic contact portion 133 is small, the end of the protrusion 134 away from the elastic contact portion 133 can be located at the cable inlet and outlet 111 (such as Figure 15The inner wall of the protrusion 134 is away from the side of the elastic contact portion 133, thereby ensuring that the protrusion 134 can be connected to the housing 11 having the cable inlet and outlet 111. In addition, the protrusion 134 with an annular structure is more convenient for production and processing.

[0085] Alternatively, in other embodiments of the present application, the protrusion 134 can also be arranged on the outer wall of one end of the elastic abutment portion 133 having the second opening 1312; or, the protrusion 134 can also be arranged on the middle area of ​​the outer wall of the elastic abutment portion 133.

[0086] On this basis, if Figure 21 As shown, the material of the protrusion 134 can include at least one of rubber and resin. The electrical device 01 can also include a rigid part 16, on which an opening 161 is provided, the opening 161 is connected to the through hole 131, and the cable 12 passes through the opening 161. The protrusion 134 is located between the rigid part 16 and the housing 11, and the protrusion 134 is sealed and connected to the rigid part 16 and the housing 11 respectively. Among them, the hardness of the rigid part 16 is greater than that of the protrusion 134. Rubber and resin have good elasticity, and the protrusion 134 made of this material has good elastic deformation performance. When the protrusion 134 is connected to the rigid part 16 and the housing 11 respectively, the rigid part 16 with greater hardness can generate an extrusion force on the protrusion 134, causing the protrusion 134 to deform, and then fit tightly against the housing 11, ensuring the sealing between the protrusion 134 and the housing 11.

[0087] For example, the material of the rigid member 16 may include metals such as copper, iron, aluminum, and alloys thereof, hard plastic, wood, etc. This embodiment of the present application does not impose any specific limitation on this.

[0088] Further, continue as Figure 21 As shown, the rigid member 16 may be provided with a third connection hole 162, and one end of the connection member 15 may sequentially pass through the first connection hole 112, the second connection hole 1341, and the third connection hole 162 to connect to the housing 11. For example, the first connection hole 112 is a threaded hole, and the connection member 15 is a bolt. The bolt sequentially passes through the third connection hole 162 and the second connection hole 1341 and is threadedly connected to the threaded hole. Alternatively, the first connection hole 112 is a pin hole, and the connection member 15 is a pin. The pin sequentially passes through the third connection hole 162 and the second connection hole 1341 and is interference-fitted with the pin hole. This achieves the connection between the rigid member 16, the protrusion 134, and the housing 11.

[0089] In some embodiments of the present application, Figure 22As shown, scale lines 135 are provided on the inner wall of the through hole 131. The scale lines 135 include grooves or protrusions engraved on the inner wall of the through hole 131. Through the scale lines 135, the staff can observe the amount of sealing material poured into the through hole 131, thereby ensuring that the amount of sealing material poured into the through hole 131 meets the demand, increasing the amount of the cured sealing material layer 14 filling between the cables 12 and the cables 12, and between the cables 12 and the cable perforation structure 13, reducing the gaps between the cables 12 and the cables 12, and between the cables 12 and the cable perforation structure 13 that are not filled by the sealing material layer 14, and reducing the occurrence of situations such as insufficient or excessive sealing material in the sealing material layer 14 due to subjective misjudgment of the staff, further alleviating the problem of insufficient sealing between the cables 12 and the cables 12, and between the cables 12 and the inner wall of the cable inlet and outlet 111.

[0090] In addition, if Figure 23 As shown, the electrical device 01 may further include a blocking layer 17, which is located on the side of the sealing material layer 14 facing the second opening 1312, and the blocking layer 17 covers at least a portion of the second opening 1312. For example, the material of the blocking layer 17 may be sealing mud, bubble gum, etc. Before the sealing material is solidified, the blocking layer 17 can further limit the sealing material, thereby reducing the probability of the sealing material flowing out of the through hole 131, increasing the amount of the finally formed sealing material layer 14 filling between the cables 12 and the cables 12, and between the cables 12 and the cable perforation structure 13, reducing the gaps between the cables 12 and the cables 12, and between the cables 12 and the cable perforation structure 13 that are not filled by the sealing material layer 14, improving the sealing effect, and alleviating the problem of the inability to ensure the sealing between the cables 12 and the cables 12, and between the cables 12 and the inner wall of the cable inlet and outlet 111.

[0091] As another example, before the blocking layer 17 and the sealing material layer 14 are solidified, the fluidity of the blocking layer 17 is weaker than that of the sealing material. In this way, the blocking layer 17 can limit the sealing material layer 14 when the sealing material layer 14 is not solidified.

[0092] The above embodiment Figure 1 、 Figure 4 、 Figure 14 or Figure 21 As shown in the figure, the cable inlet and outlet opening 111 is opened on the side wall of the shell 11 as an example. In other embodiments of the present application, the cable inlet and outlet opening 111 can also be as follows Figure 24 As shown, the cable hole structure 13 is located at the top of the housing 11. Alternatively, the cable inlet and outlet 111 can also be as shown. Figure 25 As shown, the cable through-hole structure 13 is opened at the bottom of the housing 11 .

[0093] The above is only a specific embodiment of the present application, but the scope of protection of this application is not limited to this. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An electrical device, characterized in that: include: The shell is provided with a cable inlet and outlet port; a cable penetration structure, the cable penetration structure being sealedly connected to the housing through the cable inlet and outlet; The cable perforation structure is provided with a through hole penetrating the cable perforation structure; Along the extension direction of the through hole, the through hole has a first opening and a second opening that are connected to each other, and the area of ​​the second opening is smaller than the area of ​​the first opening; a plurality of cables passing through the through-hole; A sealing material layer is provided, wherein the sealing material layer is filled in the gaps between the cables and the gaps between the cables and the inner wall of the through hole.

2. The electrical device according to claim 1, wherein: The first opening faces into the housing.

3. The electrical device according to claim 1, wherein: The cable penetration structure comprises: a support tube, wherein one end of the support tube has the first opening; An elastic abutting portion, one end of which is connected to the inner wall of the support tube, and the other end of which surrounds at least a portion of the second opening.

4. The electrical device according to claim 3, characterized in that The elastic abutting portion is a protruding structure on a side facing away from the inner wall of the support tube.

5. The electrical device according to claim 4, characterized in that The elastic abutment is a sheet-like structure. One end of the elastic abutment facing away from the first opening is connected to the inner wall of the support tube, and a gap exists between one end of the elastic abutment facing the first opening and the inner wall of the support tube.

6. The electrical device according to claim 3, characterized in that The cable penetration structure includes at least two elastic abutment portions, and the at least two elastic abutment portions are arranged along a circumference of the inner wall of the support tube on a plane perpendicular to the extension direction of the support tube.

7. The electrical device according to claim 3, characterized in that The support tube is a first hollow frustum-shaped structure, the outer diameter of the first end of the support tube is larger than the outer diameter of the second end of the support tube, and the inner diameter of the first end of the support tube is larger than the inner diameter of the second end of the support tube; the first opening is located at the first end of the support tube.

8. The electrical device according to claim 1, wherein: The cable penetration structure includes an elastic abutment portion, the through hole is formed on the elastic abutment portion, and the through hole passes through the elastic abutment portion; The elastic abutment portion is a second hollow truncated cone structure, the outer diameter of the first end of the elastic abutment portion is larger than the outer diameter of the second end of the elastic abutment portion, the first opening is located at the first end of the elastic abutment portion, and the second opening is located at the second end of the elastic abutment portion.

9. The electrical device according to claim 1, characterized in that The cable penetration structure includes an elastic abutment portion, the through hole is formed on the elastic abutment portion, and the through hole passes through the elastic abutment portion; The through hole has the first opening and the third opening at both ends respectively. Along the direction toward the axis of the through hole, the portion of the elastic abutment portion located between the first opening and the third opening protrudes toward the multiple cables and abuts against the multiple cables, and the portion of the elastic abutment portion abutting against the multiple cables surrounds the second opening.

10. The electrical device according to any one of claims 8 to 9, characterized in that: The elastic contact portion is made of at least one of rubber and resin.

11. The electrical device according to any one of claims 8 to 9, characterized in that: The cable penetration structure further includes a protrusion, which is arranged around the outer side wall of the elastic abutment portion, is connected to the elastic abutment portion, and is used for sealing connection with a side port of the cable inlet and outlet.

12. The electrical device according to claim 11, characterized in that The protruding portion is disposed on one end of the elastic contact portion having the first opening, and the protruding portion is a circular ring structure.

13. The electrical device according to claim 11, characterized in that The material of the protrusion includes at least one of rubber and resin; the electrical equipment also includes a rigid part, the protrusion is located between the rigid part and the shell, and the protrusion is sealed to the rigid part and the shell respectively; wherein the hardness of the rigid part is greater than that of the protrusion.

14. The electrical device according to claim 1, wherein Scale lines are provided on the inner wall of the through hole, and the scale lines include grooves or protrusions engraved on the inner wall of the through hole.

15. The electrical device according to claim 1, wherein The sealing material layer includes sealant.

16. The electrical device according to claim 1, wherein The electrical device further includes a blocking layer, which is located on a side of the sealing material layer facing the second opening, and covers at least a portion of the second opening.

17. A cable penetration structure, characterized in that: The cable penetration structure is provided with a through hole penetrating the cable penetration structure; along the extension direction of the through hole, the through hole has a first opening and a second opening that are connected, and the area of ​​the second opening is smaller than the area of ​​the first opening.

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