阅读说明：本技术 一种避免连接器内卡箍表面含油的光伏连接器的生产方法 (Production method of photovoltaic connector capable of preventing oil from being contained on surface of inner hoop of connector ) 是由 冯国瑜 于 2021-07-16 设计创作，主要内容包括：本发明提出一种避免连接器内卡箍表面含油的光伏连接器的生产方法,光伏连接器包括壳体,与壳体螺纹连接的螺帽,设于螺帽内部的电缆锁扣和垫圈,设于壳体内的铜质端子以及与铜质端子卡合的卡箍；所述的生产方法,在连接器内的卡箍冲压成型后,对其进行喷砂、发黑、电镀、喷漆、金属喷涂等表面处理工艺,经过表面处理后的卡箍,其表面状态与未处理的卡箍原材料的颜色具有明显的差异,光伏连接器生产厂家的零件检测人员,通过观察卡箍表面的颜色就可以非常准确的判断出卡箍零件是否经过指定的表面处理,也即,可以快速准确的判断卡箍表面是否含有油污,避免表面含油的卡箍被使用进而带来严重的光伏发电系统安全隐患。(The invention provides a production method of a photovoltaic connector for preventing the surface of an inner clamp of the connector from containing oil, wherein the photovoltaic connector comprises a shell, a nut in threaded connection with the shell, a cable lock catch and a gasket which are arranged inside the nut, a copper terminal arranged in the shell and a clamp clamped with the copper terminal; according to the production method, after the clamp in the connector is subjected to punch forming, surface treatment processes such as sand blasting, blackening, electroplating, paint spraying and metal spraying are carried out on the clamp, the surface state of the clamp after surface treatment is obviously different from the color of untreated clamp raw materials, part detection personnel of a photovoltaic connector manufacturer can accurately judge whether the clamp part is subjected to appointed surface treatment by observing the color of the surface of the clamp, namely, whether the surface of the clamp contains oil stains can be quickly and accurately judged, and the clamp with the oil stains on the surface is prevented from being used and further bringing serious potential safety hazards of a photovoltaic power generation system.)

1. The production method of the photovoltaic connector for avoiding the oil on the surface of the inner hoop of the connector comprises a shell, a nut in threaded connection with the shell, a cable lock catch and a gasket which are arranged inside the nut, a copper terminal arranged in the shell and the hoop clamped with the copper terminal, and comprises the following steps:

s1: coating lubricating oil on a clamp raw material and then performing clamp punch forming;

s2: cleaning the clamp, and then carrying out surface treatment, wherein the surface roughness or the surface color of the clamp after the surface treatment is obviously different from the color of the clamp raw material;

s3: detecting the clamp subjected to surface treatment, wherein the detection comprises the observation of the surface color or the surface structure of the clamp and the like;

s4: and (4) assembling the photovoltaic connector on the clamp which is qualified in detection to obtain a qualified photovoltaic connector product.

2. The method of claim 1, wherein in step S2, the copper terminal of the connector is sand blasted after the copper terminal is stamped and formed by the metal band.

3. The method of claim 1, wherein in step S2, after the copper terminal of the connector is pressed and formed by the metal band, the metal band is blackened.

4. The method of claim 1, wherein in step S2, after the copper terminal of the connector is pressed and formed by the metal band, the surface of the band is plated.

5. The method of claim 1, wherein in step S2, after the copper terminal of the connector is pressed and formed by the metal band, the surface of the band is painted.

6. The method of claim 1, wherein in step S2, after the copper terminal of the connector is fixed by stamping the metal band, the surface of the band is coated with metal.

Technical Field

The invention relates to the technical field of photovoltaic connectors, in particular to a production method of a photovoltaic connector capable of preventing the surface of an inner hoop of the connector from containing oil.

Background

With global climate change and the increasing severity of environmental pollution problems caused by traditional fossil energy, the green renewable energy industry has been rapidly developing over the last decade. Solar energy is a renewable resource, and solar cell technology for generating electricity by utilizing photovoltaic effect is well-paid attention by people. The solar cell is made of materials capable of generating photovoltaic effect, such as silicon, gallium arsenide, indium selenium copper and the like, and can convert light energy into electric energy.

The photovoltaic power generation system needs to connect a plurality of photovoltaic modules to form a photovoltaic module array through cables to output large voltage outwards, and the electrical connector is an indispensable device for interconnecting the photovoltaic modules, such as the electrical connector for the photovoltaic modules shown in fig. 1, which includes a male plug and a female plug, and is internally provided with a conductive copper terminal and a hoop, referring to fig. 1, taking the female plug of the currently used photovoltaic system connector as an example, in order to prevent the copper terminal 11 from being pulled loose or pulled out by the cables fixedly connected with the copper terminal 11, a barb structure 112 is designed on the copper terminal 11, in addition, a metal hoop 12 is sleeved outside the copper terminal 11 during installation, an inward concave clamping piece 122 is arranged on the metal hoop 12, after the copper terminal 11 passes through the metal hoop 12, the barb structure 112 is abutted against by the clamping piece 122, and the metal hoop 12 is limited inside the housing 10, in this way, the copper terminal 10 can be made less likely to be pulled out.

The metal band 12 is generally produced by a press and a stamping die in combination during processing, and for meeting the lubrication requirement during the production of the die and the press, grease is generally dropped or smeared on the surface of a metal band raw material (generally, a stainless steel band) during stamping so as to smoothly perform stamping production. This grease can be attached to finished product clamp surface after the punching press, if do not pack into plastic connector casing inner chamber with this oiliness clamp with the grease sanitization directly, under the high temperature environment of during operation, the grease attached to the clamp surface will produce more abominable influence to plastic connector, for example can lead to serious problems such as connector fracture, can produce great safety risk for photovoltaic module even whole photovoltaic power generation system. Therefore, generally need will wash the clamp before formally installing the embedding connector cavity, but because this grease or hydrocarbon class material often are colourless, whether the sanitization can't accurately be examined out with the naked eye, in case used the clamp of attached grease, will cause potential safety risk for photovoltaic connector product. The existing inspection method is to put a batch of clamps in hot water to scald and boil, and then observe that the water surface can not have the oil stain to float, and this kind of method is firstly time-consuming and energy-consuming, and secondly can't guarantee the accuracy that detects, and the volume of clamp is very little, even there is the greasy dirt on the surface of part clamp in a batch of clamps that detect, the adhesion volume also can not be very big, and this kind scalds the mode of observing after boiling can not guarantee to come out its inspection yet.

Disclosure of Invention

Aiming at the use requirements of the photovoltaic connector in application, the invention aims to provide a production method of the photovoltaic connector, which can avoid the oil on the surface of a clamp in the connector, and can help a photovoltaic connector manufacturer to quickly and accurately judge whether the clamp in the connector is subjected to strict surface grease cleaning or not, so that unqualified clamp parts are prevented from being installed in the connector.

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

the production method of the photovoltaic connector for avoiding the oil on the surface of the inner hoop of the connector comprises a shell, a nut in threaded connection with the shell, a cable lock catch and a gasket which are arranged inside the nut, a copper terminal arranged in the shell and the hoop clamped with the copper terminal, and comprises the following steps:

s1: coating lubricating oil on a clamp raw material and then performing clamp punch forming;

s2: cleaning the clamp, and then carrying out surface treatment, wherein the surface roughness or the surface color of the clamp after the surface treatment is obviously different from the color of the clamp raw material;

s3: detecting the clamp subjected to surface treatment, wherein the detection comprises the observation of the surface color or the surface structure of the clamp and the like;

s4: and (4) assembling the photovoltaic connector on the clamp which is qualified in detection to obtain a qualified photovoltaic connector product.

Preferably, in step S2, after the copper terminal fixing metal band of the connector is press-formed, the band is sandblasted.

Further preferably, in step S2, after the copper terminal fixing metal ferrule of the connector is press-formed, the ferrule is subjected to a blackening treatment.

Further preferably, in step S2, after the copper terminal fixing metal clip of the connector is press-formed, the clip is subjected to surface plating.

Further preferably, in step S2, after the copper terminal fixing metal clip of the connector is press-formed, the clip is subjected to a surface painting treatment.

Further preferably, in step S2, after the copper terminal fixing metal clip of the connector is press-formed, the surface of the clip is subjected to a metal plating process.

According to the production method of the photovoltaic connector, after the hoop in the connector is subjected to punch forming, surface treatment processes such as sand blasting, blackening, electroplating, paint spraying and metal spraying are carried out on the hoop, the processes are carried out only after workpieces are cleaned and deoiled, and the surface state of the hoop after the surface treatment, including surface roughness, surface color and the like, is obviously different from the color of untreated hoop raw materials; then install the clamp in the photovoltaic connector, avoid the clamp that the surface contains oil to be used and then bring serious photovoltaic power generation system potential safety hazard.

Drawings

The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings. Wherein:

fig. 1 is a schematic diagram illustrating an explosion structure of a female plug of a photovoltaic connector;

fig. 2 is a process flow diagram illustrating a method for producing a photovoltaic connector according to the present invention to prevent oil from being contained on the inner ferrule surface of the connector.

Detailed Description

The structural features and advantages of the present invention are described in detail below with reference to the accompanying drawings.

A production method of a photovoltaic connector for avoiding oil on the surface of a clamp in the connector comprises a shell, a nut in threaded connection with the shell, a cable lock catch and a gasket which are arranged inside the nut, a copper terminal arranged in the shell and a clamp clamped with the copper terminal, and is shown in figure 2, and the production method comprises the following steps:

s1: coating lubricating oil on a clamp raw material and then performing clamp punch forming;

s2: cleaning the clamp and then carrying out surface treatment, wherein the surface treatment comprises electroplating, sand blasting, blackening, spraying or other processes;

s3: detecting the clamp subjected to surface treatment, wherein the detection comprises the observation of the surface color or the surface structure of the clamp and the like;

s4: and (4) assembling the photovoltaic connector on the clamp which is qualified in detection to obtain a qualified photovoltaic connector product.

The production method of the photovoltaic connector comprises the steps of carrying out sand blasting treatment on a copper terminal metal hoop of the connector after the hoop is subjected to punch forming, wherein the sand blasting process adopts compressed air as power to form a high-speed jet beam to jet abrasive materials (generally quartz sand, carborundum and the like with extremely small diameters) to the surface of a workpiece needing to be treated at high speed, so that the appearance or the shape of the outer surface of the workpiece is changed, and the surface of the workpiece obtains certain cleanliness and different roughness due to the impact and the cutting action of the abrasive materials on the surface of the workpiece; in order to ensure the sand blasting effect, the workpiece needs to be cleaned before the sand blasting process, and impurities such as oil stains and the like on the surface of the workpiece are removed, so that the metal clamp subjected to sand blasting can ensure that the surface of the metal clamp is not adhered with the oil stains; moreover, the clamp after sand blasting treatment has certain roughness on the surface, and is compared with the bright silver on clamp surface before the sand blasting, has obvious difference, and photovoltaic connector manufacturer's part measurement personnel can be very accurate through the colour of observing the clamp surface and judge whether the clamp part passes through the sand blasting, also can be quick accurate judge whether the clamp surface contains the greasy dirt, guarantee that the surface of installing into the clamp of photovoltaic connector is grease-free.

According to the production method of the photovoltaic connector, after the copper terminal metal hoop of the connector is subjected to punch forming, the hoop is subjected to metal blackening treatment, wherein the blackening treatment is a common means of chemical surface treatment and is a method for generating an oxide film on the surface of metal to isolate air so as to achieve the purpose of rust prevention. In the metal blackening treatment process, a workpiece must be cleaned and degreased firstly, a plurality of washing and pickling processes are adopted, the workpiece surface is ensured to be free of grease, and the clamp is directly washed (residual alkali liquor is removed) and dried after being subjected to blackening treatment. Therefore, the metal hoop subjected to blackening treatment can ensure that oil stains are not attached to the surface of the metal hoop; moreover, the clamp after blackening treatment has a black or bluish black surface, and has an obvious difference compared with the bright silver color on the surface of the clamp before sand blasting, and a part detector of a photovoltaic connector manufacturer can accurately judge whether the clamp part is subjected to blackening treatment by observing the color on the surface of the clamp, namely can quickly and accurately judge whether the surface of the clamp contains oil stains, so that the surface of the clamp installed into the photovoltaic connector is ensured to be grease-free.

In the method for producing the photovoltaic connector according to another embodiment of the present invention, after the copper terminal metal clamp of the connector is stamped and formed, the surface electroplating treatment is performed on the clamp, wherein the electroplating is a process of plating a thin layer of other metal or alloy on the metal surface by using an electrolysis principle, and is a process of attaching a layer of metal film on the surface of a metal or other material workpiece by using an electrolysis effect, so as to prevent metal oxidation, improve wear resistance, conductivity, light reflection, corrosion resistance, and the like. When a workpiece is electroplated, the workpiece is generally used as a cathode, and in order to ensure the electroplating effect, before electroplating, the surface of the workpiece needs to be cleaned for multiple times, and grease attached to the surface of the workpiece can be completely removed, so that the electroplated clamp can ensure that the surface of the workpiece cannot be attached with oil stains; moreover, the clamp after electroplating treatment, its surface can present the different colour with the original bright silver of clamp, for example the copper yellow, and whether the clamp part passes through electroplating treatment can be judged through observing the colour on clamp surface just can be very accurate to the part measurement personnel of photovoltaic connector manufacturer, also can be quick accurate judge whether the clamp surface contains the greasy dirt, guarantees that the surface of installing the clamp into photovoltaic connector is grease-free.

According to the production method of the photovoltaic connector, after the copper terminal metal clamp of the connector is subjected to punch forming, surface painting and coating treatment is carried out on the clamp, metal surface painting is a method for protecting metal from oxidation corrosion, the cleaning degree of the metal surface seriously influences the binding force of a painted layer, water, oil stains, other foreign matters and the like remained or adsorbed on the surface of a workpiece are not completely eliminated, and faults such as pinholes, nodulation, peeling or poor binding are often generated; therefore, before the surface of the clamp is painted, the surface of the clamp is cleaned, and the clamp can be completely cleaned after grease attached to the surface of a workpiece is completely removed, so that the clamp subjected to surface painting and coating treatment can ensure that no oil stain is attached to the surface of the clamp; moreover, the clamp after the coating treatment of spraying paint, its surface can present the colour that is totally different with the original bright silver of clamp, and photovoltaic connector manufacturer's part measurement personnel just can be very accurate through the colour of observing the clamp surface judge whether the clamp part is through the surface treatment of spraying paint, also can be quick accurate judge whether the clamp surface contains the greasy dirt, guarantee that the surface of installing the clamp of entering photovoltaic connector is grease-free.

According to the production method of the photovoltaic connector, after the copper terminal metal hoop of the connector is subjected to punch forming, metal spraying treatment is carried out on the surface of the hoop, the metal spraying is a material protection process of spraying high-speed particle flow of molten metal on the surface of a base workpiece to generate a coating layer, and the workpiece can have better wear resistance, corrosion resistance and other properties; in order to obtain a high-quality metal spraying layer, the surface of a workpiece needs to be cleaned before metal spraying, and the cleaning can be carried out only after grease attached to the surface of the workpiece is completely removed, so that the surface of the workpiece can be ensured not to be attached with oil stains through a clamp coated with metal on the surface; moreover, at present, zinc, aluminum or aluminum-zinc alloy is generally used for spraying the metal surface, the surface of the hoop after the metal spraying treatment can be in a color different from the original bright silver color of the hoop, and part detection personnel of a photovoltaic connector manufacturer can accurately judge whether the hoop part is subjected to the metal spraying treatment by observing the color of the surface of the hoop, namely can quickly and accurately judge whether the surface of the hoop contains oil stains, so that the surface of the hoop installed in the photovoltaic connector is ensured to be grease-free.

According to the production method of the photovoltaic connector, after the hoop in the connector is subjected to punch forming, surface treatment processes such as sand blasting, blackening, electroplating, paint spraying and metal spraying are carried out on the hoop, the processes are carried out only after workpieces are cleaned and deoiled, and the surface state of the hoop after the surface treatment, including surface roughness, surface color and the like, is obviously different from the color of untreated hoop raw materials; then install the clamp in the photovoltaic connector, avoid the clamp that the surface contains oil to be used and then bring serious photovoltaic power generation system potential safety hazard.

The present invention is not limited to the embodiments described above, and those skilled in the art may make modifications or changes within the scope of the disclosure without departing from the spirit of the present invention, so that the scope of the present invention is defined by the appended claims.