Fireproof bus duct connecting assembly

Abstract

The utility model provides a fireproof bus duct connecting assembly, belonging to the bus duct structure technology field, the fireproof bus duct connecting assembly comprises bus connecting structures, a sealing device and a compensation device, the bus connecting structures are internally provided with channels used for accommodating conductive buses, the sealing device is located at the seam between the bus connecting structures, and the compensation device is located at the seam between the bus connecting structures. The connecting bus structures adopt lock catch type connecting structures, every two adjacent connecting bus structures are connected through a lock catch pin shaft, a fireproof core is arranged at the joint, and the sealing device adopts a lock catch type connecting structure; the compensation device adopts a sliding connection mode, the compensation device adopts a double-layer design, the inner layer is of a sliding connection structure, the outer layer is of a corrugated pipe structure, and the compensation device is made of metal materials and forms a continuous wave-shaped wrinkle structure through process treatment. And the safety, the reliability and the operation and maintenance convenience of the bus duct system are effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bus duct structures, and in particular relates to a fire-resistant bus duct connection component. Background Art

[0002] As an indispensable key component in modern power systems, bus duct connection components are important infrastructure for realizing high current transmission, distribution and control. Bus duct is composed of multiple sections of busbars made of metal conductors or composite materials spliced ​​together through a specific structure. The design and performance of its connection components directly determine the safety, stability and operating efficiency of the entire distribution system.

[0003] Traditional bus duct connection components usually include the following core parts: first, the conductive body, that is, the busbar made of high conductivity material for carrying and conducting current, which ensures good contact and low impedance of the electrical contact surface through precision processing; second, mechanical fastening devices, such as bolts, clamps, etc., which ensure the tight connection between the two sections of bus duct to prevent loosening or displacement caused by thermal expansion and contraction or other external forces during operation; in addition, insulating protective parts, such as insulating partitions, insulating sleeves, etc., are used to isolate the short circuit risks between different phases and enhance the overall insulation performance to ensure the safety of operators. However, in the long-term use process, traditional bus duct connection components have exposed a series of technical difficulties and limitations:

[0004] Thermal stability issues: As the load current increases, the temperature of the connection parts rises due to resistance heating. If the heat is not dissipated in time, it may cause electrical fires or accelerate insulation aging, reducing service life. Traditional connection components often lack an effective thermal management system, especially for transient overload conditions.

[0005] Mechanical reliability defects: Due to the influence of gravity and vibration for a long time, the connection may move slightly or deform, resulting in increased contact resistance, further exacerbating the heating phenomenon. Traditional fixing methods may not be able to maintain long-term stable mechanical strength and electrical contact effects when dealing with complex working conditions.

[0006] Inconvenient operation and maintenance monitoring: Most of the current bus duct connection components do not have real-time online monitoring functions, making it difficult to accurately grasp the working status of each connection point, such as key parameters such as temperature changes, stress distribution, and wear degree, making preventive maintenance difficult and costly. Utility Model Content

[0007] In view of this, the utility model provides a fire-resistant bus duct connection component, which effectively improves the safety, reliability and operation and maintenance convenience of the bus duct system by optimizing the functions and improving the structure of the connection component and introducing intelligent monitoring means.

[0008] The utility model is achieved in this way:

[0009] The utility model provides a fire-resistant bus duct connection assembly, which includes a connecting bus structure, a sealing device, and a compensation device, wherein a channel for accommodating a conductive bus is provided inside the connecting bus structure, the sealing device is located at the joint between the connecting bus structures, the connecting bus structure adopts a "lock" type connection structure, two adjacent connecting bus structures are connected by a lock pin, and a fireproof core is provided at the connection, and the sealing device adopts a "lock" type connection structure;

[0010] Wherein, the compensation device adopts a sliding connection form.

[0011] On the basis of the above technical solution, a fire-resistant bus duct connection assembly of the utility model can also be improved as follows:

[0012] The compensation device adopts a double-layer design, the inner layer is a sliding connection structure, and the outer layer is a bellows structure. The bellows structure is made of metal material, and the bellows structure is specifically a continuous wavy pleated structure.

[0013] The outer layer adopts a bellows structure design, which is a kind of elastic pipe structure that can withstand axial tensile or compressive deformation. The bellows structure is made of metal (such as stainless steel) or high-temperature resistant polymer materials, and is processed by special processes to form a continuous wavy fold structure. When the temperature changes and causes the busbar size to change, the bellows structure can expand and contract like a spring by virtue of its own ductility and recovery, effectively absorbing and dispersing the axial displacement caused by heat, and providing additional compensation.

[0014] Furthermore, the sliding connection structure includes a guide plate and a slider, the slider is fixed on the busbar, the guide plate is provided with a slide groove, and the guide plate is embedded in the connecting busbar structure.

[0015] Furthermore, the "locking" type connection structure includes an interface, a locking assembly and a fastening device, wherein the interface is arranged at both ends of the connecting busbar structure and the sealing device, the locking assembly is embedded in the interface, and the fastening device is a built-in spring.

[0016] In the design of connecting busbar modules, interfaces are located at both ends of each module. These interfaces include specially designed tooth structures or slots and other docking parts. The locking components are embedded or installed in these interfaces. When two busbar modules are docked, the locking parts at their respective ends will bite and lock each other to form a stable electrical and mechanical connection. The fastening device is usually integrated with the locking component, such as a built-in elastic element (such as a spring) or a material that can adapt to thermal expansion and contraction deformation, to ensure that the lock-type connection can still maintain close contact under temperature changes, and effectively absorb and release the stress caused by the thermal expansion and contraction of the busbar.

[0017] Furthermore, the interface is specifically an embedded or protruding tooth-shaped structure or a slot component;

[0018] The locking assembly is a component made of elastically deformable metal sheet.

[0019] Furthermore, the surface of the connecting busbar structure is coated with a fireproof and heat-insulating coating, including ceramic microspheres, aluminum silicate fibers, high-temperature resin adhesive, mica powder, and graphene materials.

[0020] Furthermore, a layer of metal mesh is wrapped around the outside of the connecting busbar structure for electromagnetic shielding, including a stainless steel mesh, an aluminum alloy mesh or a copper mesh.

[0021] Furthermore, the sealing device is made of a high-temperature heat-insulating material, and the high-temperature heat-insulating material includes ceramic fibers.

[0022] Furthermore, the slider is made of high temperature resistant alloy material, including nickel-based high temperature alloy and iron-nickel-based heat-resistant alloy.

[0023] Nickel-based high-temperature alloys: such as Inconel 718 (UNS N07718), which is a heat-resistant alloy widely used in the aerospace field with excellent high-temperature strength, oxidation resistance and creep resistance.

[0024] Iron-nickel based heat resistant alloys: such as Haynes 25 (UNS R30605) or Hastelloy X (UNS N06002), these alloys exhibit excellent mechanical properties and corrosion resistance at high temperatures.

[0025] Furthermore, it also includes a remote monitoring system, which includes a temperature sensor and a stress sensor arranged at the connecting bus structure, and the remote monitoring system controls and connects the temperature sensor and the stress sensor.

[0026] Compared with the prior art, the fire-resistant bus duct connection assembly provided by the utility model has the following beneficial effects:

[0027] 1. Fire safety improvement:

[0028] The utility model adopts a connecting busbar module made of high-strength flame-retardant material, whose internal channel is used to accommodate the conductive busbar. The hollow structure and selected materials greatly enhance the fire resistance of the module itself, effectively preventing the electrical short circuit and spread caused by the burning of materials in the event of a fire;

[0029] The design of the fireproof sealing device is a highlight of the utility model. The high-temperature insulation material installed at the joints of each busbar module has excellent sealing properties at high temperatures, which can effectively prevent flames and heat from spreading through the connection gaps, thus forming a solid fireproof barrier;

[0030] 2. Optimized bus duct connection component design:

[0031] The "locking" connection structure enables seamless docking and tight fixation between adjacent busbar modules. This structure not only ensures good electrical contact, but also greatly improves the connection strength and stability, overcoming the loosening and displacement problems that may occur in traditional fastening methods, and performs excellently in dealing with thermal expansion and contraction.

[0032] The compensation device adopts a double-layer design, combining an inner sliding connection structure with an outer corrugated tube structure, ensuring that the busbar can expand and contract freely during temperature changes without generating excessive stress on the connection parts, effectively avoiding damage to the connection parts caused by excessive thermal stress, and further improving the fatigue resistance and service life of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 This is an example diagram of a fire-resistant bus duct connection assembly;

[0035] Figure 2 A top view of a fire-resistant bus duct connection assembly;

[0036] Figure 3 This is an example diagram of a fire-resistant bus duct connection assembly fastening device;

[0037] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0038] 10. Connecting busbar structure; 11. Interface; 12. Locking assembly; 13. Fastening device; 20. Sealing device; 30. Compensation device. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the implementation mode of the present invention clearer, the technical solution in the implementation mode of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the implementation mode of the present invention.

[0040] like Figure 1 , Figure 2 , Figure 3 As shown, it is a first embodiment of a fire-resistant bus duct connection assembly provided by the utility model. In this embodiment, it includes a connecting bus structure 10, a sealing device 20, and a compensation device 30, wherein a channel for accommodating a conductive bus is provided inside the connecting bus structure 10, the sealing device 20 is located at the joint between the connecting bus structures 10, the connecting bus structure 10 adopts a "locking" type connection structure, two adjacent connecting bus structures 10 are connected by a locking pin shaft, and a fireproof core is provided at the connection, and the sealing device 20 adopts a "locking" type connection structure;

[0041] The compensation device 30 is in the form of a sliding connection.

[0042] Among them, in the above technical solution, the compensation device 30 adopts a double-layer design, the inner layer is a sliding connection structure, and the outer layer is a corrugated tube structure. The corrugated tube structure is made of metal material, and the corrugated tube structure is specifically a continuous wavy pleated structure.

[0043] Among them, the process includes the following aspects:

[0044] Material modification: The materials used in the corrugated tubular structure (such as polyethylene PE, polypropylene PP, metal, etc.) are modified, such as adding antioxidants, UV stabilizers, cold-resistant agents and other additives to improve their weather resistance, chemical corrosion resistance and aging resistance.

[0045] Molding process:

[0046] Hydroforming: Liquid medium is used to transmit pressure to form a corrugated structure of a predetermined shape in the mold, ensuring uniform tube wall thickness and high corrugation accuracy.

[0047] Roll forming: The straight tube is continuously extruded into a corrugated shape through a roller or roller system. It is suitable for mass production and the requirements for the corrugation size are not very strict.

[0048] Welding process: For metal corrugated tubular structures, welding technologies such as butt welding and argon arc welding may be involved to ensure the sealing and strength of the joints of the corrugated tubular structure.

[0049] Surface preparation:

[0050] Anti-corrosion treatment: The surface of the metal corrugated tubular structure may be electroplated, sprayed, hot-dip galvanized and other processes to enhance its corrosion resistance.

[0051] Enhanced adhesion: For example, the surface pretreatment of the PE steel belt corrugated tube structure is to increase the adhesion between the steel and the plastic, so that they can be firmly combined during winding and molding, and improve the peel strength.

[0052] Punching and coating treatment:

[0053] For the permeable corrugated tube structure, precise holes are punched in the grooves and geotextile is wrapped around the periphery to meet the needs of drainage and filtration.

[0054] Post-processing:

[0055] Heat setting: eliminate internal stress through high temperature treatment and stabilize the corrugated shape and size.

[0056] Surface finish treatment: Polishing, sandblasting and other methods are used to improve surface smoothness and glossiness, reduce friction resistance, and facilitate installation and use.

[0057] Furthermore, in the above technical solution, the sliding connection structure includes a guide plate and a slider, the slider is fixed on the busbar, the guide plate is provided with a slide groove, and the guide plate is embedded in the connecting busbar structure 10.

[0058] When the busbar changes in length due to temperature changes, the slider can slide smoothly in the slide groove to adapt to the expansion or contraction of the busbar, avoiding the additional stress caused by thermal expansion and contraction being directly transferred to the connecting parts and causing damage.

[0059] Furthermore, in the above technical solution, the "locking" type connection structure includes an interface 11, a locking assembly 12 and a fastening device 13, wherein the interface 11 is arranged at both ends of the busbar structure 10 and the sealing device 20, the locking assembly 12 is embedded in the interface 11, and the fastening device 13 is a built-in spring.

[0060] Further, in the above technical solution, the interface 11 is specifically an embedded or externally protruding tooth structure or a slot component;

[0061] The locking assembly 12 is a member made of an elastically deformable metal sheet.

[0062] Furthermore, in the above technical solution, the surface of the connecting busbar structure 10 is coated with a fireproof and heat-insulating coating, including ceramic microspheres, aluminum silicate fibers, high-temperature resin adhesives, mica powder, and graphene materials.

[0063] Furthermore, in the above technical solution, a layer of metal mesh is wrapped around the outside of the connecting busbar structure 10 for electromagnetic shielding, including a stainless steel mesh, an aluminum alloy mesh or a copper mesh.

[0064] Furthermore, in the above technical solution, the sealing device 20 is made of a high-temperature heat-insulating material, and the high-temperature heat-insulating material includes ceramic fibers.

[0065] Furthermore, in the above technical solution, the slider is made of high temperature resistant alloy material, including nickel-based high temperature alloy and iron-nickel-based heat-resistant alloy.

[0066] Furthermore, in the above technical solution, a remote monitoring system is also included. The remote monitoring system includes a temperature sensor and a stress sensor arranged at the connecting busbar structure 10. The remote monitoring system controls and connects the temperature sensor and the stress sensor.

[0067] It should be noted that the control of the device by the remote monitoring system can be achieved through simple programming.

[0068] Specifically, the principle of the utility model is:

[0069] 1. Fire protection design principles and implementation:

[0070] Application of high-strength flame-retardant materials: The busbar module is made of specially formulated high-strength flame-retardant materials, which have excellent fire resistance and the ability to maintain structural integrity at high temperatures, and can effectively inhibit the spread of flames and heat conduction during fires. At the same time, its hollow structure design also plays a certain role in heat insulation, reducing the possibility of heat transfer to the surrounding environment;

[0071] Fireproof sealing device integration: Fireproof sealing devices made of high-temperature insulation materials are installed at the joints between each busbar module. The device can still maintain good sealing performance under high temperature conditions to prevent flames and heat from spreading through the connection gap. Its design principle is based on the matching of material expansion coefficients at different temperatures and the selection of thermal conductivity to ensure that an effective fireproof isolation zone can still be formed under high temperature conditions;

[0072] 2. Optimized bus duct connection component principle:

[0073] Innovation of "locking" connection structure: The "locking" connection structure uses precisely designed mechanical interlocking parts to achieve seamless docking and stable connection between adjacent busbar modules. When two modules are docked, the internal locking parts bite and lock each other to ensure the reliability of electrical contact and the stability of mechanical connection. This design can avoid local overheating caused by excessive contact resistance when bearing large current loads, and effectively cope with the stress challenges caused by thermal expansion and contraction of the busbar;

[0074] Working principle of the double-layer compensation device: In order to absorb the thermal expansion and contraction caused by the temperature change of the busbar, the utility model adopts a double-layer compensation device. The inner sliding connection structure allows the busbar to expand and contract freely within a certain range, and realizes the unimpeded transmission of thermal displacement through the precision-machined slide groove and slider system; the outer corrugated tube structure provides additional compensation space in the axial direction by virtue of its own elasticity, further dispersing and absorbing the stress caused by temperature changes. The two-layer structure works together to ensure that the connection part is always in a safe and stable state;

[0075] 3. Integration of intelligent remote monitoring system:

[0076] By deploying high-precision temperature sensors, stress sensors and other monitoring equipment at key locations, real-time data on the status of the bus duct is collected and transmitted to the central control system. The intelligent algorithm analyzes and judges based on the preset thresholds. Once an abnormal situation is found, an alarm is triggered immediately, and related equipment can be remotely controlled to adjust operating parameters or initiate emergency measures.

[0077] By recording and analyzing large amounts of data, the system helps operation and maintenance personnel understand the operating status of the entire power system, foresee potential problems in a timely manner, and formulate reasonable preventive maintenance strategies, thereby significantly improving the safety and operating efficiency of the system.

Claims

1. A fire-resistant bus duct connection assembly, characterized in that: The invention comprises a connecting busbar structure (10), a sealing device (20), and a compensation device (30), wherein a channel for accommodating a conductive busbar is provided inside the connecting busbar structure (10), the sealing device (20) is located at the joint between the connecting busbar structures (10), the connecting busbar structure (10) adopts a "locking" type connection structure, two adjacent connecting busbar structures (10) are connected by a locking pin shaft, and a fireproof core is provided at the connection, and the sealing device (20) adopts a "locking" type connection structure; Wherein, the compensation device (30) adopts a sliding connection form.

2. A fire-resistant bus duct connection assembly according to claim 1, characterized in that: The compensation device (30) adopts a double-layer design, the inner layer is a sliding connection structure, and the outer layer is a bellows structure, the bellows structure is made of metal material, and the bellows structure is specifically a continuous wavy pleated structure.

3. A fire-resistant bus duct connection assembly according to claim 2, characterized in that: The sliding connection structure comprises a guide plate and a sliding block, wherein the sliding block is fixed on the busbar, the guide plate is provided with a sliding groove, and the guide plate is embedded in the connecting busbar structure (10).

4. A fire-resistant bus duct connection assembly according to claim 3, characterized in that: The "locking" type connection structure comprises an interface (11), a locking assembly (12) and a fastening device (13), wherein the interface (11) is arranged at both ends of the connecting busbar structure (10) and the sealing device (20), the locking assembly (12) is embedded in the interface (11), and the fastening device (13) is a built-in spring.

5. A fire-resistant bus duct connection assembly according to claim 4, characterized in that: The interface (11) is specifically an embedded or externally protruding tooth-shaped structure or a slot component; The locking assembly (12) is a component made of elastically deformable metal sheet.

6. A fire-resistant bus duct connection assembly according to claim 5, characterized in that: The surface of the connecting busbar structure (10) is coated with a fireproof and heat-insulating coating, which comprises ceramic microspheres, aluminum silicate fibers, high-temperature resin adhesive, mica powder, and graphene material.

7. A fire-resistant bus duct connection assembly according to claim 6, characterized in that: The outer side of the connecting busbar structure (10) is wrapped with a layer of metal mesh for electromagnetic shielding, including a stainless steel mesh, an aluminum alloy mesh or a copper mesh.

8. A fire-resistant bus duct connection assembly according to claim 7, characterized in that: The sealing device (20) is made of a high-temperature heat-insulating material, and the high-temperature heat-insulating material includes ceramic fibers.

9. A fire-resistant bus duct connection assembly according to claim 8, characterized in that: The sliding block is made of high temperature resistant alloy material, including nickel-based high temperature alloy and iron-nickel-based heat resistant alloy.

10. A fire-resistant bus duct connection assembly according to claim 9, characterized in that: It also includes a remote monitoring system, which includes a temperature sensor and a stress sensor arranged at the connecting busbar structure (10), and the remote monitoring system controls and connects the temperature sensor and the stress sensor.

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