WO2015039401A1

WO2015039401A1 - Intensively insulated busway

Info

Publication number: WO2015039401A1
Application number: PCT/CN2013/091261
Authority: WO
Inventors: 周和平
Original assignee: 深圳市沃尔核材股份有限公司; 深圳市沃尔特种线缆有限公司; 金坛市沃尔新材料有限公司; 乐庭电线工业（惠州）有限公司; 惠州乐庭电子线缆有限公司
Priority date: 2013-09-18
Filing date: 2013-12-31
Publication date: 2015-03-26
Also published as: CN103474929A; CN103474929B; WO2015039411A1

Abstract

An intensively insulated busway, comprising a busbar protective housing (10) and a busbar unit disposed inside the busbar protective housing; the busbar unit comprises a plurality of busbars (20), and the busbars comprise a conductor (21) and an insulating layer (22) covering the busbars; the plurality of busbars are arranged side-by-side and parallel to one another; the space between the busbar protective housing and the busbar unit is filled with fire-resistant material; an inorganic endothermic material (30) is provided inside the intensively insulated busway; the inorganic endothermic material is an inorganic material that absorbs heat when heated and also releases steam. By means of the inorganic endothermic material disposed within the intensively insulated busway, the fire-resistance properties of the busway are improved, the intensively insulated busway is better able to continue to supply power during a fire, and the duration for which the intensively insulated busway is able to supply power during a fire is prolonged.

Description

Technical field

The invention relates to a dense insulated busway. Do not

A plurality of busbars are arranged in the busway for transmitting electrical energy, and have the function of collecting and distributing power. It is used to deliver the electrical energy output from the generator, transformer or rectifier to individual users or other substations.

Busway has increasingly replaced wire and cable in power transmission trunking projects. Developed countries abroad, as well as Hong Kong and Macao in China, have become popular. In Guangzhou, Guangdong, China, more than 12 floors of building distribution rooms, that is, more than 90% of the trunk lines leading to the floor use busway; 630KVA transformer to power distribution cabinet to use busway. Public construction projects in large and medium-sized cities, busbars for hotels and office buildings are also popularized, and busbar trunks are the best choice for power transmission trunks with rated voltages below 1000V.

Since the busway carries high current and high voltage during power transmission, the busway product has extremely high requirements on insulation performance and fire resistance, but the existing busbar groove is still difficult to meet the fire performance requirements.

SUMMARY OF THE INVENTION An object of the present invention is to provide a dense insulated busway having excellent insulation and fire resistance.

To achieve the above object, the present invention provides a dense insulated busway including a busbar shield and a busbar unit disposed in the busbar shield; the busbar unit includes a plurality of busbars, the busbar Including a busbar conductor and an insulating layer covering the busbar conductor, the plurality of busbars are arranged side by side in parallel to form a whole; the busbar shield shell and the busbar unit are filled with refractory, the dense The type of insulating heat sink material is provided with an inorganic heat absorbing material; the inorganic heat absorbing material is capable of absorbing heat when heated and capable of releasing water steaming Inorganic material of gas.

As described above, the intensive insulated busway of the present invention is provided with an inorganic heat absorbing material capable of releasing water vapor when heated to a certain extent, and absorbing heat during the process of releasing water vapor by the inorganic heat absorbing material. The endothermic process itself can cool down, and the vapour volatilization can continuously remove heat and reduce the temperature of the busway, which can improve the fire resistance of the busway and improve the continuous power supply of the dense insulated busway in the fire. , Extend the continuous power supply time of the dense insulated busway in the fire.

1 is a schematic cross-sectional view of Embodiment 1 of a dense insulated busway of the present invention; FIG. 2 is a cross-sectional structural view of Embodiment 2 of a dense insulated busway of the present invention; FIG. 3 is a third embodiment of a dense insulated busway of the present invention. FIG. 4 is a cross-sectional structural view of Embodiment 4 of the dense insulated busway of the present invention; FIG. 5 is a schematic cross-sectional view of Embodiment 5 of the dense insulated busway of the present invention. In the figure: busbar protective casing 10, metal plate 1 1 , bolt 12, busbar 20, busbar conductor 21, insulating layer 22, inorganic heat absorbing material 30, filling groove 40, metal shell 50, first filling groove 51 The second filling groove 52, the metal plate 53, and the covering portion 54.

Very. Really.

The details of the technical contents, the component structure, the objects and effects achieved by the present invention will be described in detail below with reference to the accompanying drawings.

Example 1

Referring to FIG. 1, the dense insulated busway of the present invention has a substantially rectangular parallelepiped shape, and includes a busbar protective casing 10 and a busbar unit disposed in the busbar protective casing 10.

The busbar protective casing 10 is a protective casing of a dense insulated busway, generally a metal casing, such as a steel or iron casing, having the function of protecting internal components of the busway. In this embodiment, the busbar protective casing 1 0 is surrounded by four metal plates 1 1 , and two adjacent metal plates are fixed together by bolts 12 , and of course, they can also be fixed by screws.

The busbar unit includes a plurality of busbars 20. The busbar 20 includes a busbar conductor 21 and an insulating layer 22 covering the busbar conductor 21. The insulating layer 22 is opposite to the busbar conductor. 21 is mainly used for insulation. For use, it may be a heat-shrinkable tube, preferably a material that is also refractory, such as a ceramized silicone rubber composite tape, a refractory mica tape, or a mixture of the two. In this embodiment, the insulating layer 22 is made of a ceramized silicone rubber composite belt, which can be used for flame retarding and fire resistance, and has excellent flame retardancy and fire resistance. Even if it exceeds the fire end limit, it can be ablated to form a hard protective shell, and the protective shell can prevent the flame. Further extending to the busbar conductor 21 protects the busbar conductor 21 located in the ceramized silicone rubber composite tape from damage, ensuring the normal use function of the busbar 20, and improving the safety of the product.

The plurality of busbars 20 are arranged side by side in parallel to form a unitary body as a busbar unit. A filling groove 40 is formed between the busbar protective casing 10 and the busbar unit, and the filling tank 40 is filled with a refractory. The refractory material is preferably a refractory cotton or a ceramized silicone rubber.

Refractory cotton can be used for refractory work, and it has a heat-dissipating effect different from other refractory materials. It can ensure that the temperature of the busway can be released in time during the fire, so that the inside of the busway can be kept clear during the fire. Refractory cotton is generally selected to be refractory cotton with a high temperature resistance of 1000 Ό or more. The refractory cotton has the ability to shrink and shrink, and the insulation layer 22 ensures insulation performance and ensures the normal operation of the busbar 20 during a fire.

The ceramized silicone rubber can play a flame retardant and refractory effect, and has excellent flame retardant and fire resistance. Even if it exceeds the fire end limit, it can be ablated to form a hard protective shell, and the protective shell can prevent the flame from further extending to the busbar conductor, thereby protecting the ceramization. The busbar conductor in the silicone rubber insulation layer is not damaged, ensuring the normal use function of the busbar and improving the safety of the product.

The intensive insulated busway is provided with an inorganic heat absorbing material 30, which is an inorganic material capable of absorbing heat when heated and capable of releasing water vapor. The inorganic endothermic material is preferably one or more of magnesium hydroxide, aluminum hydroxide, hydrated potassium aluminum sulfate, and hydrated calcium sulfate. The inorganic endothermic material is not limited to the ones listed above, and may be any inorganic material capable of absorbing heat after being heated and capable of releasing water vapor.

Preferably, the inorganic endothermic material 30 is fixed by fibers, and the fibers are preferably glass fibers ': 维. °

In the present embodiment, adjacent busbars 20 are arranged at intervals in the busbar unit, and an inorganic heat absorbing material 30 is disposed between adjacent busbars 20.

In order to further improve the fire resistance, the busbar protective shell 10 is provided with a foaming fireproof coating layer (not shown). The intensive insulated busway of the present invention is provided with an inorganic heat absorbing material 30, which can release water vapor when heated to a certain extent, and has an endothermic process in the process of releasing water vapor from the inorganic heat absorbing material. The endothermic process itself can cool down, and the vapour volatilization can continuously remove heat and reduce the temperature of the busway, which can improve the fire resistance of the busway and improve the continuous power supply of the dense insulated busway in the fire. , Extend the intensive insulated busway for continuous power supply in the event of a fire. Example 2

Referring to FIG. 2, FIG. 2 discloses Embodiment 2 of the dense insulated busway of the present invention. This embodiment is similar to Embodiment 1, except that: adjacent busbars 20 in the busbar unit are not spaced apart but are adjacent to each other. Settings. Therefore, the inorganic heat absorbing material 30 is no longer disposed between the adjacent bus bars 20, but is wrapped around the busbars 20 arranged side by side, that is, the inorganic material is coated on the periphery of the busbar unit. The manner in which the inorganic material is integrally wrapped around the periphery of the busbar unit is more comprehensively protected between the busbars and the busbars in the manner in which the spacing between the adjacent busbars is set in the first embodiment. Each busbar in the unit is not affected by the high temperature of the fire house. Example 3

Referring to FIG. 3, FIG. 3 discloses Embodiment 3 of the dense insulated busway of the present invention. This embodiment is similar to Embodiment 1 except that: The dense insulated busway is further covered with inorganic heat absorption outside the busbar unit. Material 30. The manner of providing inorganic material between adjacent bus bars in the busbar unit and outside the busbar unit can be double protected, and the inorganic material is separately provided in the embodiment 1 and the embodiment 2 to protect More powerful, more comprehensive protection of each busbar in the busbar unit. Example 4

Please refer to FIG. 4, which discloses Embodiment 4 of the dense insulated busway of the present invention. This embodiment is similar to Embodiment 1 except that the dense insulated busway further includes a metal shell 50, and the metal shell 50 is disposed. Inside the busbar shield 10, the busbar unit is disposed within the metal shell 50. The metal shell 50 is coated with an inorganic heat absorbing material 30. Metal shell 50 A first filling groove 51 is formed between the bus bar unit and the bus bar unit. A second filling groove 52 is formed between the inorganic heat absorbing material 30 and the bus bar protective casing 10. The first filling tank 5 1 and the second filling tank 52 are respectively filled with a refractory.

The metal shell 50 mainly plays a fixed supporting role for the outer layer of the inorganic heat absorbing material. In the embodiment, the metal shell 50 is surrounded by four metal plates 53, and the two free ends of each metal plate 53 are vertically inward. The cladding portion 54 is formed by bending.

It should be noted that the busbar unit shown in Fig. 4 can be provided with an inorganic heat absorbing material for protection in the manner of Embodiments 1 and 2. For example, as shown in Fig. 1 of the embodiment 1, adjacent busbars are arranged at intervals in the busbar unit, and the inorganic heat absorbing material is disposed between adjacent busbars. Alternatively, as shown in Fig. 2 in Embodiment 2, adjacent busbars in the busbar unit are adjacently disposed, and the busbar unit is coated with an inorganic heat absorbing material. Example 5

Referring to FIG. 5, FIG. 5 discloses Embodiment 5 of the dense insulated busway of the present invention. This embodiment is similar to Embodiment 4 except that: adjacent busbars 20 are arranged at intervals in the busbar unit, and adjacent busbars 20 are provided. An inorganic heat absorbing material 30 is disposed therebetween, and the bus bar unit is coated with an inorganic heat absorbing material 30. That is, in the embodiment, the busbar unit is provided with the inorganic heat absorbing material in the manner of the embodiment 3 and FIG. 3 for protection, and the busbar unit has the protection of the double inorganic heat absorbing material. In addition, the inorganic heat absorbing material around the metal shell 50, that is, a total of three inorganic heat absorbing materials for protection, can provide more protection for the busbar in the busway. In summary, the intensive insulated busway of the present invention is provided with an inorganic heat absorbing material 30. The inorganic heat absorbing material 30 can release water vapor when heated to a certain extent, and sucks in the process of releasing water vapor from the inorganic heat absorbing material. Heat, this endothermic process itself can cool down, and the vapour volatilization can continuously remove heat and reduce the temperature of the busway, which can improve the fire resistance of the busway and improve the dense insulated busway in the fire. Continuous power supply capability, extending the continuous power supply time of dense insulated busway slots in fire. The present invention is not limited to the specific embodiments described above, and various changes may be made thereto by those skilled in the art, and any equivalents or equivalents to the present invention are intended to be included within the scope of the appended claims.

Claims

1. A dense insulated bus duct, including a busbar protective shell and a busbar unit arranged in the busbar protective shell; the busbar unit includes a plurality of busbars, and the busbar includes a busbar conductor and a package The insulation layer covering the busbar conductor, the plurality of busbars are arranged side by side in parallel to form a whole; the refractory material is filled between the busbar protective shell and the busbar unit, which is characterized by: the dense insulation An inorganic heat-absorbing material is provided in the bus duct; the inorganic heat-absorbing material is an inorganic material that can absorb heat and release water vapor when heated.

2. The intensive insulated bus duct according to claim 1, characterized in that: adjacent busbars in the busbar unit are arranged at intervals, and the inorganic heat-absorbing material is arranged between the adjacent busbars.

3. The intensive insulated bus duct according to claim 2, characterized in that: the busbar unit is covered with the inorganic heat-absorbing material.

4. The intensive insulated bus duct according to claim 1, characterized in that: adjacent busbars in the busbar unit are arranged adjacently, and the busbar unit is covered with the inorganic

5. The intensive insulated bus duct according to claim 1, characterized in that: the intensive insulated bus duct further includes a metal shell, the metal shell is arranged inside the busbar protective shell, and the busbar The unit is arranged in the metal shell; the metal shell is covered with the inorganic heat-absorbing material; a first filling groove is formed between the metal shell and the busbar unit; the inorganic heat-absorbing material and A second filling groove is formed between the busbar protective shells, and the first filling groove and the second filling groove are respectively filled with the refractory material.

6. The intensive insulated bus duct according to claim 5, characterized in that: adjacent busbars in the busbar unit are arranged at intervals, and the inorganic heat-absorbing material is arranged between the adjacent busbars.

7. The dense insulated bus duct according to claim 6, characterized in that: the busbar unit is covered with the inorganic heat-absorbing material.

8. The intensive insulated bus duct according to claim 5, characterized in that: adjacent busbars in the busbar unit are arranged adjacent to each other, and the busbar unit is covered with the inorganic heat-absorbing material.

9. The intensive insulated bus duct according to any one of claims 1 to 8, characterized in that: the insulating layer is a heat shrinkable tube, a ceramicized silicone rubber composite tape, a refractory mica tape or a ceramicized silicone rubber composite tape. and refractory mica tape blend.

10. The intensive insulated bus duct according to any one of claims 1 to 8, characterized in that: the refractory material is refractory cotton or ceramic silicone rubber.

1 1. The intensive insulated bus duct according to claim 1, characterized in that: the inorganic endothermic material is one or more of magnesium hydroxide, aluminum hydroxide, hydrated potassium aluminum sulfate, and hydrated calcium sulfate. .

1-2. The dense insulated bus duct according to claim 1 or 11, characterized in that: the inorganic heat-absorbing material is fixed by fibers.

13. The densely insulated bus duct according to claim 12, characterized in that: the fiber is glass fiber.

14. The intensive insulated bus duct according to claim 1, characterized in that: a fire retardant coating layer is provided outside the busbar protective shell.