This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of explosion-proof electric bells (hereinafter referred to as electric bells). This standard applies to the design, manufacture and inspection of electric bells. Electric bells are used as execution signals in factories and coal mines with explosive gas environments. JB/T 6322-1992 Explosionproof electric bell JB/T6322-1992 Standard download and decompression password: www.bzxz.net

K35
JB
People's Republic of China Press Machinery Ring Industry Standard JB/T63221992
0
1992-06-26 4
e||tt| |1/4
1993-01-01
G20P xEe/
1 Subject content and scope of application
JB/T63221992
This standard stipulates This document specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of explosion-proof electric bells (hereinafter referred to as electric bells).
This standard applies to the design, manufacturing and inspection of electric bells. Electric bells are used as execution signals in factories and coal mines with explosive gas environments. Reference standards
2
GB191
GB156
JB834
GB998
GB1497
GB2423.4||tt| |GB3768
JB4262bzxz.net
GB3836.1
Packaging, storage and transportation pictorial mark
Rated voltage
Tropical low-voltage electrical appliances
Basic low-voltage electrical appliances Test method
Basic standards for low-voltage electrical appliances
is test Db: alternating damp heat test method
Basic environmental test procedures for electrical and electronic products Determination of noise source sound power level-simple method Explosion-proof electrical appliances Rubber sheathed cable entry device
General requirements for explosion-proof electrical equipment for explosive environments. Explosion-proof electrical equipment for explosive environments. Explosion-proof electrical equipment "d" GB3836.2
Increased safety type for explosion-proof electrical equipment for explosive environments. Electrical equipment "e" GB3836.3
JB2759
General technical conditions for mechanical and electrical product packaging
3 Product classification and basic parameters
3.1 Classification
3.1. 1 According to the place of use; Category 1, Category I. 3.1.2 According to the structure type: single click, combo. 3.2 Basic parameters
3.2.1 DC voltage: 110, 220V. AC voltage: 36, 127, 220V. 3.2.2 Bell diameter specifications: 56 (55), 71 (75), 125, 160 (150), 180, 200mm. 3.2.3 Working system: short-time working system.
4 Technical requirements
Electric bells should comply with the requirements of this standard and must be manufactured according to specified procedures with drawings and technical documents approved by the nationally recognized quality supervision and inspection department, and obtain an explosion-proof certificate issued by the inspection unit It can be produced later. 4.1 The electric bell should be able to work normally under the conditions listed in Table 1. 1992-06-26 Rat
1
1993-01-01 Yi
Environmental conditions
Ambient air temperature
Relative air humidity
Explosive gas mixture
Significant agitation and severe impact
Rain and rainfall intensity
Solar radiation intensity
Sand and dust||tt ||Ice, snow, frost, dew
Baking dye level
Installation category
Ore
Use
JB/T63221992
table 1
Lu
95% (at 25℃)
within
factory
2000m
-20~~40℃|| tt | hour)
Maximum rainfall intensity 50mm/10min
Maximum radiation intensity 5.86J/cm, min
Yes
Yes
3
There was no breakdown or flashover for 1 minute.
4.2 The electric bell should be able to withstand the power frequency withstand voltage test specified in Table 2, Qiu 2
rated insulation voltage Ui
i60
60Ui300
Frequency withstand voltage test voltage value (AC effective value) 1000
2000
The material of the electric bell shell should comply with the relevant regulations of GB3836.1 and GB3836.2. 4.31
The minimum electrical resistance of the inner cavity of the electric bell The clearance and minimum creepage distance should comply with the provisions of Table 3. 4.4
Table 3
Rated voltage
V
36
110||tt| |127
220
Minimum electrical clearance
mm
4
6
6
6||tt| |Note: 1. ", Ia" in the table refers to the tracking index classification compared to GB3836.3. I
6
6
6
Electrical distance
mm
I
4
7
7
8
Ia
4
8
8
10
The bell housing must be equipped with internal and external grounding bolts and marked with the grounding symbol "". The inner grounding bolt should have the same diameter as the wiring bolt; The external 4.5
ground bolts shall not be smaller than M6.
The electric bell fasteners must have measures to prevent self-loosening. 4.6
The static strength test of the electric bell shell shall comply with the requirements of GB3836.2. . 4.8 The minimum effective length of the explosion-proof joint surface of the electric bell (L); the minimum effective length from the edge of the bolt through hole to the edge of the explosion-proof joint surface (L,), and the maximum age of the explosion-proof joint surface (W) should comply with GB3836. 2. 4.9 The surface roughness parameter Ra value of the explosion-proof surface of the electric bell is 6.3 μm. The surface roughness parameter Ra value of the connecting shaft is 3.2 μm. Clear and permanent embossing marks must be set on the obvious parts of the electric bell shell. "Exd1" (for mining), "Ex" (for factory use). 4.10
4.11 The inner surface of the electric bell shell is painted with arc-resistant paint, and the outer surface must be painted to meet the requirements of the electric bell's use environment. Parts 2
must have anti-rust measures.
JB/T63221992
4.12 The impact resistance of the electric bell shell shall comply with the provisions of GB3836.1. 4.13 The introduction device of the electric bell shall be. Comply with the requirements of JB4262. 4.14 The moisture resistance of the electric bell shall comply with the requirements of JB834. The test period is 12d at high temperature. The insulation resistance after the test shall not be less than that specified in Table 4 and shall withstand the power frequency withstand test specified in Article 4.2. . Table 4
Rated insulation voltage Ui
V
Minimum insulation resistance
MO
Ui60
1
4.15 The explosion-proof performance of the electric bell should comply with the regulations of GB3836.2. 60
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