阅读说明：本技术 一种母线绝缘层的涂覆方法、母线及电力设备 (Coating method of bus insulating layer, bus and power equipment ) 是由 黄文亮 黄泽荣 陈晓鹏 石基 张大兴 向宇杰 刘畅 张宇光 祝伟强 于 2020-07-01 设计创作，主要内容包括：本发明涉及电力技术领域,公开了一种母线绝缘层的涂覆方法、母线及电力设备。母线绝缘层的涂覆方法包括：加热母线至预设温度范围；向母线表面喷涂绝缘涂料；烘干母线表面的绝缘涂料,形成绝缘膜；在绝缘膜外侧喷涂液体蜡,形成蜡膜。本发明提高了母线的绝缘性能,提高了安全性,同时也降低了更换频率,进而降低了材料成本和操作人员的工作强度。(The invention relates to the technical field of electric power, and discloses a coating method of a bus insulating layer, a bus and electric power equipment. The coating method of the bus insulating layer comprises the following steps: heating the bus to a preset temperature range; spraying insulating paint on the surface of the bus; drying the insulating paint on the surface of the bus to form an insulating film; and spraying liquid wax on the outer side of the insulating film to form a wax film. The invention improves the insulating property of the bus, improves the safety, and simultaneously reduces the replacement frequency, thereby reducing the material cost and the working strength of operators.)

1. A method for coating a bus insulating layer is characterized by comprising the following steps:

heating the bus to a preset temperature range;

spraying insulating paint on the surface of the bus;

drying the insulating paint on the surface of the bus to form an insulating film;

and spraying liquid wax outside the insulating film to form a wax film.

2. The method of coating a bus bar insulating layer according to claim 1, further comprising, before the heating the bus bar: and cleaning the surface of the bus.

3. The method for coating the insulating layer of the bus bar according to claim 1, wherein the temperature of the bus bar is maintained within the preset temperature range until the insulating paint is completely sprayed during the process of spraying the insulating paint onto the surface of the bus bar.

4. The method of coating a bus bar insulating layer according to claim 1, wherein the thickness of the insulating film is 4mm to 6 mm.

5. The method for coating the insulating layer of the bus bar according to claim 1, wherein the step of spraying a liquid wax on the insulating coating to form a wax film further comprises: cooling the bus bar to room temperature.

6. The method for coating the insulating layer of the bus bar according to claim 1, wherein the step of spraying a liquid wax on the insulating paint to form a wax film further comprises: and polishing the outer surface of the wax film.

7. A bus bar comprising a bus bar body and an insulating layer provided on the bus bar body, wherein the insulating layer is coated by the coating method of the bus bar insulating layer according to any one of claims 1 to 6.

8. The bus bar of claim 7 wherein the bus bar body is a copper bar.

9. The bus bar of claim 7, further provided with a flame retardant layer disposed outside the insulating layer.

10. An electrical apparatus, comprising a bus bar according to any one of claims 7-9.

Technical Field

The invention relates to the technical field of electric power, in particular to a coating method of a bus insulating layer, a bus and electric power equipment.

Background

With the development of society, the living standard of people is continuously improved, and the demand on electric energy is more and more increased. The transformer substation is used as core power equipment in a power system, and plays a vital role in ensuring safe and stable transmission of electric energy. The copper bar is a long conductor with a generally chamfered rectangle section, and plays a role in conveying current and connecting electrical equipment in a circuit. At present, a bus inside an alternating current feeder screen of a transformer substation generally uses a copper bar as the bus, and a thermal shrinkage sleeve is used as an insulating material on the bus to prevent short circuit faults. Because the bus is insulated by the heat-shrinkable sleeve, but the heat-shrinkable sleeve cannot be completely attached to the copper bar, hollowing can occur at a 90-degree corner, a gap can be caused due to the difficulty in complete attachment, insulation hidden danger is generated, and the insulation performance of the bus is greatly reduced; along with the increase of the operation period, the thermal shrinkage sleeve is very easy to fall off to cause short-circuit accidents, and needs to be replaced frequently; moreover, along with the different sizes of the buses, the thermal shrinkable sleeves with different specifications need to be suitable and cut, so that the working strength and the material cost are increased; finally, at the joint of adjacent buses, due to the fact that the connection is achieved through screws, the thermal shrinkage sleeve cannot be used at the position, protection is not comprehensive enough, and the insulation performance of the buses is reduced. The insulating inefficacy of the inside generating line copper bar of transformer substation's alternating current feeder screen can lead to the great improvement of the fault rate of electrical equipment, and insulating destruction can bring very big potential safety hazard for transformer substation's primary equipment and secondary equipment safety and stability's operation.

Accordingly, there is a need for a method for coating a bus bar insulating layer, a bus bar and an electric power device to solve the above problems.

Disclosure of Invention

The invention aims to provide a coating method of a bus insulating layer, a bus and power equipment, which avoid short-circuit accidents caused by aging and falling of the insulating layer, improve the insulating property of the bus, improve the safety, reduce the replacement frequency and further reduce the material cost and the working strength of operators.

In order to achieve the purpose, the invention adopts the following technical scheme:

a coating method of a bus insulating layer comprises the following steps:

heating the bus to a preset temperature range;

spraying insulating paint on the surface of the bus;

drying the insulating paint on the surface of the bus to form an insulating film;

and spraying liquid wax outside the insulating film to form a wax film.

Preferably, before the heating the bus bar, the method further comprises: and cleaning the surface of the bus.

Preferably, in the process of spraying the insulating paint on the surface of the bus bar, the temperature of the bus bar is kept within the preset temperature range until the insulating paint is sprayed.

Preferably, the thickness of the insulating film is 4mm to 6 mm.

Preferably, the spraying of the liquid wax outside the insulating coating further comprises, before forming the wax film: cooling the bus bar to room temperature.

Preferably, the spraying of the liquid wax outside the insulating coating material further includes, after the forming of the wax film: and polishing the outer surface of the wax film.

The bus comprises a bus body and an insulating layer arranged on the bus body, wherein the insulating layer is formed by coating the bus insulating layer by adopting the coating method.

Preferably, the bus bar body is a copper bar.

Preferably, the bus bar is further provided with a flame-retardant layer, and the flame-retardant layer is arranged outside the insulating layer.

An electrical device comprising a bus bar as described above.

The invention has the beneficial effects that:

according to the coating method of the bus insulating layer provided by the embodiment of the invention, firstly, a bus is heated to a preset temperature range, then, the insulating paint is sprayed on the surface of the bus, the insulating paint is dried to form an insulating film, and finally, liquid wax is sprayed on the outer side of the insulating film to form a wax film. The heating bus can make follow-up in-process to the bus spraying insulating coating, utilizes higher temperature to dry insulating coating with higher speed, has reduced follow-up stoving insulating coating's time, has reduced the time cost, has reduced operating personnel's working strength. Insulating coating is sprayed on the surface of the bus, the thermal shrinkable sleeve is replaced by the insulating coating, and the insulating coating can be completely attached to the bus by using a spraying method, so that the short-circuit accident caused by aging and falling of the insulating coating is avoided, the insulating coating can be coated on each part of the bus, the insulating property of the bus is improved, the safety is improved, the fault frequency of power equipment is reduced, the working strength of maintenance personnel is reduced, the potential safety hazard of the power equipment is reduced, the replacement frequency is reduced, and the material cost and the working strength of operating personnel are reduced. And the insulating coating is dried to form an insulating film, so that the insulating film can be stably attached to the bus, and the insulating property of the bus is ensured. Liquid wax is sprayed on the outer side of the insulating film, a wax film is formed on the outer side of the insulating film, the insulating film can be protected by the wax film, the insulating film is prevented from cracking, the oxidation and aging of the insulating film are slowed down, the insulating property of the insulating film is ensured, the service life of the insulating film is prolonged, the replacement frequency is further reduced, and further the material cost and the working strength of operators are reduced.

Drawings

Fig. 1 is a flowchart illustrating main steps of a method for coating a bus bar insulating layer according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating detailed steps of a method for coating a bus bar insulating layer according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.