Regular certificate renewal inspection of explosio

2022-09-19
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Regular certificate renewal inspection of explosion-proof products of Huangshan liangye Valve Co., Ltd.

the leading products produced by our company: HZB series, QCB series explosion-proof valve electric devices and kfmb series explosion-proof valve controllers. According to the national safety production management regulations, they must obtain the "explosion-proof certificate" issued by the national explosion-proof electrical product quality supervision and inspection center before they can be produced and sold, The valid period of the certificate is

the leading products produced by our company: HZB series, QCB series explosion-proof valve electric devices and kfmb series explosion-proof valve controllers. According to the national safety production management regulations, they must obtain the "explosion-proof certificate" issued by the national explosion-proof electrical product quality supervision and inspection center before they can be produced and sold. The valid period of the certificate is five years

our company has always insisted that scientific and technological innovation is the development of the enterprise. This mixture also shows a good resistance to the media widely used in lithium batteries. Promoting scientific and technological progress is the driving force for the development of the enterprise. Since 2012, the technical upgrading and transformation of the above explosion-proof products has made breakthrough progress in becoming a pillar industry in mechanical structure, electrical control, the use of new materials and their forming technology, digital manufacturing, etc. On the basis of retaining the original technological advantages, it gives new technological vitality

now there are new explosion-proof product series: hz12b series, qc1c2b series explosion-proof valve electric devices, including: conventional, integral and intelligent, and kfmb series explosion-proof valve controllers, with a total of 344 specifications and models

from January 15 to 16, 2014, Nanyang explosion proof Institute of national explosion proof electrical product quality supervision and inspection center appointed two experts, Zhang LiXiao, senior engineer and Xi Tao, engineer, to our company to conduct technical review on the above explosion-proof products before certificate replacement

according to the national standard: gb/t24922/2010 technical conditions for electric devices of flameproof valves; GB3836. Electrical equipment for explosive gas atmospheres Part 1: General requirements; GB3836. Electrical equipment for explosive gas atmospheres Part 2: Flameproof "d". The two experts reviewed the design drawings, executive standards, operation instructions and other technical data of explosion-proof products, and the structure, materials, performance parameters and other contents of explosion-proof products in their own position to meet the Centennial explosion of the founding of the Republic of Turkey in 2023. A total of 121 drawings, 14 executive standards, operation instructions and other technical data were reviewed, and they were recognized as qualified

for representative prototypes: HZB, hz/xyb, qc/xyb, qc/xyc and kfmb-2, conduct temperature rise test on the test bench with load, and it is recognized as qualified

conduct a pressure test on explosion-proof parts (shells). The pressure is 1MPa (Level B) and 1.5MPa (Level C) for 10 + 2 seconds. It is qualified if there is no dripping or structural damage. Among them, a 2.0 MPa overpressure test is also conducted on class C explosion-proof products, which is recognized as qualified

according to gb3836 According to the requirements of "electrical equipment for explosive gas atmospheres Part 2: Flameproof" d ", however, the analog-to-digital (a/d) conversion circuit will discrete the analog quantity into digital quantity, and the explosion-proof products need to do" internal ignition non detonation test ", which stipulates the explosion-proof joint surface clearance of all parts and components of the prototype, that is, the test clearance is close to the maximum allowable clearance, and the test of the prototype should meet the requirements when the joint surface clearance is close to the critical state,

explosion proof joint surface clearance ie during test: 0.8ic ≤ ie ≤ IC ≤ it

IC - maximum structural clearance specified in the drawing

it - the maximum clearance allowed by the standard

for all the parts of the explosion-proof joint surface of the prototype, whether the fitting clearance meets the IE, the two experts measure and check 61 relevant parts item by item, and they all meet the requirements, and then assemble all the parts into five sets of the whole machine, and ship them to Nanyang explosion-proof Institute for internal ignition non detonation test and other inspections

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