Bus duct with sealing protection function

Abstract

The utility model discloses a bus duct with sealed protection function, including tank shell and the bus conductor of setting in tank shell, and the tank shell is filled with sealed insulator. The innovative point lies in, the sealed insulator is constituted by inner sealing layer and outer sealing layer, and the combination interface between both is the non - plane combination structure for reinforcing interlayer binding force. The non - plane combination structure includes the convex part of setting in the upper and lower both ends outer surface of inner sealing layer, and the anchoring structure of setting in the left and right both sides outer surface of inner sealing layer, the anchoring structure contains anchoring combination ring and connecting block. The outer sealing layer covers the convex part and inserts the anchoring combination ring, forms three -dimensional mechanical interlock. The utility model discloses through the design of double -layer sealing structure and non - plane combination interface, realized the firm combination and performance complementation of interlayer, effectively promoted the sealed stability of bus duct, mechanical strength and stress -cracking resistance, solved the technical problem of single sealing material performance contradiction.

Description

Technical Field

[0001] This utility model relates to the field of busbar technology, specifically a busbar with a sealing and protection function. Background Technology

[0002] Busbar trunking, as a highly efficient power transmission device, is widely used in various buildings and industrial facilities. One of its core requirements is reliable sealing and insulation performance to prevent the intrusion of external media such as dust and moisture, and to ensure sufficient electrical insulation strength, thereby ensuring power supply safety and long-term stable operation of the system.

[0003] Currently, most commercially available sealed and insulated busbar trunking systems employ a casting process, where a single insulating and sealing material (such as epoxy resin or polyurethane) is filled inside the busbar trunking shell to form a monolithic sealed insulator. While this process achieves sealing and insulation functions to a certain extent, it still has the following drawbacks in terms of long-term reliability and performance optimization: There are inherent contradictions in the material properties of single-cast sealing insulators. A single insulating material cannot possibly possess all the desirable properties. If high fluidity is prioritized to ensure adequate filling of the tiny gaps in the busbar conductors and the inner wall of the trunking, and to reduce air bubbles, the cured material often suffers from insufficient mechanical strength, rigidity, or abrasion resistance. Conversely, if high strength and rigidity are prioritized to provide stable support and protection, its fluidity is usually poor, which may lead to incomplete filling. Furthermore, its elasticity is low, making it prone to stress concentration within the material or at the interface when dealing with thermal stress caused by load changes, ambient temperature fluctuations, and electromagnetic vibrations generated during operation. This can lead to microcracks or even full cracks, compromising the integrity of the seal.

[0004] Therefore, we propose a busbar trunking with a sealing protection function. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a busbar trunking with sealing and protection functions. By setting up a double-layer sealing layer with a non-planar joint structure and functional partition materials, it achieves strong interlocking and complementary performance between the layers, effectively improving the sealing stability, mechanical strength and stress crack resistance of the busbar trunking, and effectively solving the problems in the background technology.

[0006] (II) Technical Solution To achieve the above objectives, the technical solution adopted by this utility model is as follows: a busbar trunking with a sealing and protection function, comprising a trunking shell and a busbar conductor disposed within the trunking shell, wherein the trunking shell is filled with a sealing insulator, the sealing insulator comprising a tightly bonded inner sealing layer and an outer sealing layer; the interface between the inner sealing layer and the outer sealing layer is a non-planar bonding structure for enhancing interlayer bonding force to improve sealing stability; the non-planar bonding structure comprises a protrusion and an anchoring structure.

[0007] Preferably, the protrusions are disposed on the outer surfaces of the upper and lower ends of the inner sealing layer, the anchoring structure is disposed on the outer surfaces of the left and right sides of the inner sealing layer, and the protrusions, the anchoring structure and the inner sealing layer are integrally cast.

[0008] Preferably, the anchoring structure includes an anchoring ring and a connecting block, wherein the connecting block is fixed between one outer surface of the anchoring ring and one outer surface of the inner sealing layer.

[0009] Preferably, the outer sealing layer covers the protrusion and the anchoring structure, and is embedded in the anchoring connection ring of the anchoring structure.

[0010] Preferably, the inner sealing layer is composed of a first sealing material, and the outer sealing layer is composed of a second sealing material, wherein the first sealing material has higher fluidity than the second sealing material.

[0011] Preferably, the outer sealing layer is composed of a first sealing material, and the inner sealing layer is composed of a second sealing material, wherein the elastic modulus of the first sealing material is less than that of the second sealing material.

[0012] Preferably, the first sealing material is a flexible epoxy resin, silicone rubber, or flexible polyurethane; the second sealing material is a rigid epoxy resin or rigid polyurethane.

[0013] (III) Beneficial Effects Compared with the prior art, this utility model provides a busbar trunking with a sealing and protection function, which has the following beneficial effects: 1. This type of busbar trunking with sealing protection function forms a double sealing barrier by setting a tightly combined inner sealing layer and an outer sealing layer; the inner sealing layer can preferably be made of a high-flow material to ensure that the microscopic gaps in the busbar conductor and the inner wall of the trunking are filled without dead angles, thus eliminating the seepage channels at the source; the outer sealing layer can preferably be made of a high-strength material to provide sealing and protection for the main structure. The two work together to achieve all-round sealing from the inside to the outside and from the microscopic to the macroscopic, thereby improving the protection level and long-term sealing stability.

[0014] 2. The busbar trunking with sealing protection function has a non-planar joint structure at the interface between the inner and outer sealing layers. This structure includes specially arranged protrusions and anchoring structures. This design transforms the traditional interlayer "surface joint" into a robust "three-dimensional mechanical interlock". When the outer sealing layer covers and embeds these structures, the two layers of material are firmly locked together, which can effectively resist the shear stress and peeling stress caused by temperature cycling and electromagnetic vibration.

[0015] 3. This type of busbar trunking with sealing and protection function allows the use of materials with different properties for the inner and outer layers (and protrusions); for example, the inner sealing layer uses a high-flow material to ensure perfect wetting, while the outer sealing layer uses a high-strength material to bear the mechanical load; or, the outer sealing layer uses a flexible material to buffer stress, while the key protrusions use a rigid material to ensure locking strength; this "combination of rigidity and flexibility" and "functional zoning" material usage strategy enables the busbar trunking to simultaneously take into account excellent sealing and filling performance, mechanical strength, crack resistance and stress buffering capacity, breaking through the technical bottleneck of the limitation of single material performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a busbar trunking with sealing and protection function according to this utility model.

[0017] Figure 2 This utility model relates to a busbar trunking system with a sealing and protection function. Figure 1 Enlarged view of point A in the middle.

[0018] Figure 3 This is a partial structural diagram of a busbar trunking with sealing and protection function according to the present invention.

[0019] Figure 4 This is a schematic diagram of an anchoring structure in a busbar trough with sealing and protection function according to the present invention.

[0020] In the diagram: 1. Channel shell; 2. Busbar conductor; 3. Sealing insulator; 4. Inner sealing layer; 5. Outer sealing layer; 6. Protrusion; 7. Anchoring structure; 8. Anchoring ring; 9. Connecting block. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figure 1-4As shown, the busbar trunking with sealing protection function provided by this utility model mainly consists of a trunking shell 1, a busbar conductor 2 disposed within the trunking shell 1, and a sealing insulator 3 filled within the trunking shell 1. The sealing insulator 3 is the core improvement of this utility model, which adopts a double-layer composite structure, including a tightly bonded inner sealing layer 4 and an outer sealing layer 5.

[0023] The key to this invention lies in the fact that the interface between the inner sealing layer 4 and the outer sealing layer 5 is not a simple plane, but is designed as a non-planar bonding structure to enhance interlayer bonding force and improve sealing stability. This non-planar bonding structure specifically includes a protrusion 6 and an anchoring structure 7 disposed on the outer surface of the inner sealing layer 4.

[0024] The protrusions 6 are located on the outer surfaces of the upper and lower ends of the inner sealing layer 4, while the anchoring structures 7 are located on the outer surfaces of the left and right sides of the inner sealing layer 4. The inner sealing layer 4, the protrusions 6, and the anchoring structures 7 are preferably cast into a single precast component in one pour to ensure structural strength.

[0025] The anchoring structure 7 specifically includes an anchoring ring 8 and a connecting block 9. The anchoring ring 8 is a ring-shaped structure with a central through hole, such as a circular ring. One end of the connecting block 9 is fixed to the outer surface of one side of the anchoring ring 8, and the other end is fixed to the side surface of the inner sealing layer 4, thereby supporting and fixing the anchoring ring 8 outside the inner sealing layer 4. The anchoring ring 8, the connecting block 9, and the inner sealing layer 4 are integrally cast.

[0026] During assembly and final molding, the outer sealing layer 5 is cast onto the periphery of the pre-formed inner sealing layer 4 (along with the protrusions 6 and anchoring structure 7). The liquid material of the outer sealing layer 5 flows and fills the contour of the protrusions 6, while simultaneously embedding itself into the central through-hole and surrounding area of ​​the anchoring ring 8 of the anchoring structure 7, forming a robust three-dimensional mechanical interlock. This structure increases the bonding area and mechanical interlocking force between the two layers, effectively resisting interlayer shear stress and peeling stress caused by temperature changes and electromagnetic vibrations, thus improving the long-term stability of the sealing structure.

[0027] In terms of material selection, two functional zoning strategies can be adopted: Strategy 1: The inner sealing layer 4 is composed of a first sealing material, and the outer sealing layer 5 is composed of a second sealing material, with the first sealing material having higher fluidity than the second sealing material. Under this strategy, the highly fluid inner sealing layer 4 material can fully wet and wrap the bus conductor 2, filling all microscopic gaps in the tank shell 1, ensuring a defect-free basic seal; while the slightly less fluid but stronger outer sealing layer 5 material serves as the main structural support, providing the primary mechanical protection and sealing barrier.

[0028] Strategy Two: The outer sealing layer 5 is composed of a first sealing material, and the inner sealing layer 4 is composed of a second sealing material, with the elastic modulus of the first sealing material being less than that of the second sealing material. Under this strategy, using a more flexible material (such as flexible epoxy resin, silicone rubber, or flexible polyurethane) as the outer sealing layer 5 can better absorb and buffer external stress and vibration; while using a more rigid material (such as rigid epoxy resin or rigid polyurethane) to manufacture the inner sealing layer 4 (including the protrusions 6 and anchoring structure 7) can ensure the strength and shape stability of the mechanical interlocking node, guaranteeing the locking effect.

[0029] The manufacturing process of this utility model can be briefly described as follows: First, the bus conductor 2 is positioned and installed in the external mold; then, the first pouring is performed to form a precast part including an inner sealing layer 4, a protrusion 6 and an anchoring structure 7; after it has initially cured, the mold is removed and it is placed inside the tank shell 1. The two ends of the bus conductor 2 are supported by the support members to prevent the inner sealing layer 4 from contacting the inner wall of the tank shell 1. Then, the second pouring is performed to form an outer sealing layer 5 covering the precast part, and finally a complete sealing insulator 3 is formed.

[0030] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A busbar trunking system with sealing and protection function, comprising a trunking shell (1) and busbar conductors (2) disposed within the trunking shell (1), wherein the trunking shell (1) is filled with a sealing insulator (3), characterized in that: The sealing insulator includes a tightly bonded inner sealing layer (4) and an outer sealing layer (5); the interface between the inner sealing layer (4) and the outer sealing layer (5) is a non-planar bonding structure used to enhance interlayer bonding force and improve sealing stability; the non-planar bonding structure includes a protrusion (6) and an anchoring structure (7).

2. The busbar trunking with sealing and protection function according to claim 1, characterized in that: The protrusion (6) is located on the outer surfaces of the upper and lower ends of the inner sealing layer (4), and the anchoring structure (7) is located on the outer surfaces of the left and right sides of the inner sealing layer (4). The protrusion (6), the anchoring structure (7) and the inner sealing layer (4) are integrally cast together.

3. A busbar trunking with sealing and protection function according to claim 2, characterized in that: The anchoring structure (7) includes an anchoring ring (8) and a connecting block (9), wherein the connecting block (9) is fixed between one side of the outer surface of the anchoring ring (8) and one side of the outer surface of the inner sealing layer (4).

4. A busbar trunking system with sealing and protection function according to claim 3, characterized in that: The outer sealing layer (5) covers the protrusion (6) and the anchoring structure (7) and is embedded in the anchoring connection ring (8) of the anchoring structure (7).

5. A busbar trunking system with sealing and protection function according to any one of claims 1 to 4, characterized in that: The inner sealing layer (4) is made of a first sealing material, and the outer sealing layer (5) is made of a second sealing material. The first sealing material has a higher fluidity than the second sealing material.

6. A busbar trunking system with sealing and protection function according to any one of claims 1 to 4, characterized in that: The outer sealing layer (5) is made of a first sealing material, and the inner sealing layer (4) is made of a second sealing material. The elastic modulus of the first sealing material is less than that of the second sealing material.

7. A busbar trunking with sealing and protection function according to claim 6, characterized in that: The first sealing material is flexible epoxy resin, silicone rubber, or flexible polyurethane; the second sealing material is rigid epoxy resin or rigid polyurethane.

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