Most of the products seen in the domestic explosion-proof electrical appliance market do not pay attention to the design and processing of the products, and the products produced are always rough and unattractive. There are some unexplained phenomena in the structure of some explosion-proof electrical appliances. In other manufacturers, there are many problems in the explosion-proof products, such as the explosion-proof surface, the explosion-proof gap, the surface roughness and the length of the explosion-proof surface. Explosion-proof electrical products on the market mainly have the following quality problems:
1The bolts are fastened between the large cover and the main cavity of the explosion-proof product, and the spacing is more than 200 mm. It is difficult to ensure the explosion-proof gap and pass the explosion test;
2 Explosion-proof transformers usually use ordinary transformers in explosion-proof enclosures to become explosion-proof transformers. After the transformer is installed in the explosion-proof enclosure, the heat-dissipation conditions are changed without considering the problems of temperature rise, short-circuit, insulation, etc., just adding an explosion-proof casing;
3 For the insertion and removal device, there is a lack of insertion and extraction force, contact resistance requirements and arc extinguishing requirements;
4 Many anti-explosion products for heating are only equipped with an explosion-proof junction box with ordinary products, that is, they become explosion-proof products, such as: electric heaters, electric heaters and other products;
5 Fan products are also the same as above, except that the explosion-proof junction box is added to the ordinary fan, which is an explosion-proof type product. It should be noted that the main components and the motor should also be in explosion-proof form;
6 In the production process of explosion-proof enclosures, hydraulic pressure tests are carried out one by one according to the standard requirements. Many enterprises do not carry out hydraulic testing or only sampling tests. For non-standard products, hydraulic testing is not carried out at all;
7Because the factory uses a large number of cast aluminum alloy casings for explosion-proof electrical appliances, it is reasonable to use ZL102 material in the standard. Some products are mixed with a large amount of miscellaneous aluminum, and some even use explosion-proof casings made of miscellaneous aluminum. Get the most profit possible;
8 The gap between the explosion-proof terminal and the housing is more serious than the gap;
9 For dust explosion-proof electrical appliances, due to the increasing demand for dust explosion-proof electrical appliances in recent years, some manufacturers have also changed production. However, most enterprises have changed the original explosion-proof products to a name, and they have not manufactured according to the relevant standards.
10 For the product nameplate, many manufacturers simply do not pay attention to this. First of all, some of the materials are made of aluminum, some are made of self-adhesive, and they are not made of copper at all. In addition, for the content on the nameplate, it is first necessary to comply with the standards and the main technical parameters should be marked so that the user can clearly understand the main performance indicators of the product;
11 In the product manual, the protection requirements of the product during installation are often lacking. For example: installation height, rain, snow protection and other requirements, especially for outdoor products, if the confession is unclear, it is easy to cause product damage and accidents.
1The bolts are fastened between the large cover and the main cavity of the explosion-proof product, and the spacing is more than 200 mm. It is difficult to ensure the explosion-proof gap and pass the explosion test;
2 Explosion-proof transformers usually use ordinary transformers in explosion-proof enclosures to become explosion-proof transformers. After the transformer is installed in the explosion-proof enclosure, the heat-dissipation conditions are changed without considering the problems of temperature rise, short-circuit, insulation, etc., just adding an explosion-proof casing;
3 For the insertion and removal device, there is a lack of insertion and extraction force, contact resistance requirements and arc extinguishing requirements;
4 Many anti-explosion products for heating are only equipped with an explosion-proof junction box with ordinary products, that is, they become explosion-proof products, such as: electric heaters, electric heaters and other products;
5 Fan products are also the same as above, except that the explosion-proof junction box is added to the ordinary fan, which is an explosion-proof type product. It should be noted that the main components and the motor should also be in explosion-proof form;
6 In the production process of explosion-proof enclosures, hydraulic pressure tests are carried out one by one according to the standard requirements. Many enterprises do not carry out hydraulic testing or only sampling tests. For non-standard products, hydraulic testing is not carried out at all;
7Because the factory uses a large number of cast aluminum alloy casings for explosion-proof electrical appliances, it is reasonable to use ZL102 material in the standard. Some products are mixed with a large amount of miscellaneous aluminum, and some even use explosion-proof casings made of miscellaneous aluminum. Get the most profit possible;
8 The gap between the explosion-proof terminal and the housing is more serious than the gap;
9 For dust explosion-proof electrical appliances, due to the increasing demand for dust explosion-proof electrical appliances in recent years, some manufacturers have also changed production. However, most enterprises have changed the original explosion-proof products to a name, and they have not manufactured according to the relevant standards.
10 For the product nameplate, many manufacturers simply do not pay attention to this. First of all, some of the materials are made of aluminum, some are made of self-adhesive, and they are not made of copper at all. In addition, for the content on the nameplate, it is first necessary to comply with the standards and the main technical parameters should be marked so that the user can clearly understand the main performance indicators of the product;
11 In the product manual, the protection requirements of the product during installation are often lacking. For example: installation height, rain, snow protection and other requirements, especially for outdoor products, if the confession is unclear, it is easy to cause product damage and accidents.
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