This standard specifies the type and size, technical requirements, test methods, inspection rules, packaging and marking of porcelain sleeves for electrostatic precipitators (hereinafter referred to as porcelain sleeves). This standard is applicable to porcelain sleeves for electrostatic precipitators with rated DC voltage of 72, 80, 90, 100KV, operating temperature not exceeding 250℃, and installation location altitude not exceeding 1000m. JB/T 5909.1-1991 Porcelain sleeves for electric precipitators JB/T5909.1-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Porcelain Insulators for Electrostatic Precipitators
Supporting Porcelain Bushings
1 Subject Content and Scope of Application
JB/T5909.1-91
This standard specifies the type and size, technical requirements, test methods, inspection rules, packaging and marking of supporting porcelain bushings for electrostatic precipitators (hereinafter referred to as porcelain bushings).
This standard applies to supporting porcelain bushings for electrostatic precipitators with rated DC voltages of 72, 80, 90, 100 kV and operating temperatures not exceeding 250°C, and the installation site altitude does not exceed 1000m. Cited standards
GB775.1~775.3
JB3384
JB/Z94
3 Types and dimensions
Technical conditions for high-voltage insulator porcelain parts
Test methods for insulators
Electrical terminology insulators
Sampling plan for high-voltage insulators
Insulator product packaging
3.1 The porcelain sleeve shall be manufactured according to the drawings approved in the prescribed procedures, and the type and main dimensions shall conform to the provisions of Figure 1, Figure 2 and Table 1. Figure 1 Cylindrical porcelain bushing
Approved by the Ministry of Machinery and Electronics Industry on December 25, 1991 Figure 2 Conical porcelain bushing
Implemented on October 1, 1992
JH-07201C
JH-07202C
JH-07251C
JH-07252C
JH-08001C
JH-0805 1C
JH-08052C
JH-09001C
JH-09051C
JH-10051C
JH-10052C
3.2 The porcelain sleeve model is expressed as follows:
JH-XXX
4 Technical requirements
JB/T5909.1-91
Porcelain Main dimensions of the sleeve
460±10
400±4
600±5
460±10
350±8
410±9
520±12
480±11
640±14
Code when the working temperature is 250℃
330±7
270±6
225±6
270±6
Product design serial number: expressed by one Arabic numeral mm
Product model number: expressed by one Arabic numeral, 0~4 is cylindrical, 5~9 is conical
Rated voltage, kV
Ceramic bushing for electrostatic precipitator
4.1·The appearance quality of the porcelain bushing shall comply with the corresponding provisions of GB772. 4.2The power frequency breakdown voltage of the porcelain bushing wall thickness shall not be lower than the corresponding provisions of GB772. The cross section of the porcelain bushing shall be homogeneous and dense, and there shall be no penetration after the porosity test. The pressure during the porosity test shall not be less than 4.3
20MPa, and the product of pressure and time shall not be less than 180MPa·h. 4.4The roughness R of the upper and lower end surfaces of the porcelain bushing is 12.5um. 4.5 The geometric tolerances of the porcelain sleeve shall comply with the following provisions: a.
The flatness of the upper and lower end faces of the porcelain sleeve shall not exceed 0.5mm; the parallelism of the upper and lower end faces of the porcelain sleeve shall not exceed 2mm; the roundness of the porcelain sleeve shall not exceed 2% of the outer diameter of the porcelain sleeve; the coaxiality of the upper and lower ends of the porcelain sleeve shall not exceed 3mm.
4.6 The porcelain sleeve shall withstand three rapid temperature changes without damage. The test temperature difference shall comply with the relevant provisions of GB772. 4.7 The porcelain sleeve shall withstand a 5min power frequency withstand voltage test without breakdown, damage or abnormal heating. The voltage value shall comply with the relevant provisions of GB772.
4.8 The porcelain sleeve shall withstand the temperature and voltage withstand test without damage, and the test temperature and test voltage shall comply with the provisions of Table 2. 2
Rated DC voltage
DC test voltage at room temperature
DC test voltage at 250℃
JB/T5909.1—91
Table 2 Temperature and voltage withstand test values
The compression failure load of the porcelain bushing at room temperature shall not be less than 500kN. 5 Test methods
5.1 Power frequency voltage withstand test
The power frequency voltage withstand test of the porcelain bushing shall be carried out in accordance with the provisions of GB775.2. 5.2 Temperature cycle test
The temperature cycle test of the porcelain bushing shall be carried out in accordance with the provisions of GB775.1. 5.3 Porosity test
The porosity test of the porcelain bushing shall be carried out in accordance with the provisions of GB775.1. 5.4 Power frequency breakdown voltage test of wall thickness
The power frequency breakdown voltage test of the bushing wall thickness shall be carried out in accordance with the provisions of GB775.2. 5.5 Temperature and voltage withstand test
Install the clean sample on a test machine with a constant temperature box, and apply voltage to the electrodes on both ends of the sample. During the test, first turn on the power of the constant temperature box, and when the test temperature reaches the standard, keep the temperature constant for 40 minutes, then turn off the power of the constant temperature box, and then apply voltage to the standard value for 1 minute. The sample should not flash over.
5.6 Compression failure test
At room temperature, place the sample on a press, and apply pressure evenly and without impact until it is destroyed. The load value at this time is the compression failure load value.
6 Inspection rules
The porcelain bushing should be inspected and accepted by the quality inspection department of the manufacturer, and the manufacturer should ensure that all delivered porcelain bushings meet the requirements of this standard. 6.1
According to the inspection rules specified in this standard, users have the right to inspect whether the quality and indicators of the porcelain bushing meet the requirements specified in this standard. 6.2
Porcelain bushings shall be inspected and accepted in batches. Porcelain bushings of the same type made by the same process shall be considered as a batch, and the number of each batch shall not exceed 100. 6.3
6.4 The inspection of porcelain bushings is divided into individual inspection, sampling inspection and type test. 6.4.1 Individual inspection
Individual inspection shall be carried out in accordance with the provisions of Table 3. If any of the requirements specified in Table 3 are not met, the porcelain bushing shall be unqualified. Table 3 Inspection items one by one
Inspection item number
6.4.2 Sampling inspection
Inspection item name
Appearance inspection
Dimension inspection
Work voltage withstand test
Inspection requirements
Article 4.1 of this standard
Article 3.1.4.5 of this standard
Article 4.7 of this standard
Inspection method
Article 5.1 of this standard
Sampling inspection should be carried out by randomly selecting 2 specimens after each inspection is qualified in accordance with the provisions of Table 4. The piece-rate secondary sampling plan shall be adopted, and its sampling rules and judgment procedures shall comply with the provisions of JB3384. 3
Inspection item number
Inspection item name
Temperature cycle test
Pore gland test
JB/T5909.1--91
Table 4 Sampling inspection content
Inspection requirements
Article 4.6 of this standard
Article 4.3 of this standard
Number of samples
After the first inspection
Porcelain blocks Take one piece for each sample
Inspection methodbzxz.net
Article 5.2 of this standard
Article 5.3 of this standard
If one sample does not meet any of the requirements specified in Table 4 during the inspection, double the number of samples should be drawn from the same batch of products for re-inspection. If there is still one sample that does not meet any of the requirements in Table 4, the batch of porcelain bushings is unqualified. 6.4.3 Type test
When a new product is finalized or its structure is modified, or when the raw material formula and process method are changed, a type test must be carried out. The number of specimens for the type test shall not be less than 4, and after each test is passed, the test shall be carried out in accordance with Table 5. Table 5 Type test content
Test item number
Test item name
Temperature cycle test
Compression failure test
Temperature voltage withstand test
Wall thickness breakdown voltage
Porosity test
Test requirements
Article 4.6 of this standard
Article 4.9 of this standard
Article 4.8 of this standard
Article 4.2 of this standard
Article 4.3 of this standard
Number of specimens
After 2 to 4 tests
One piece of porcelain block for each specimen
Test method
Article 5.2 of this standard
Article 5.6 of this standard
Article 5.5 of this standard
Article 5.4 of this standard
Article 5.3
During the type test, if one of the samples does not meet any of the requirements specified in Table 5, the type test fails. 7
Packaging and marking
The porcelain bushings shall be packed in wooden boxes and ensure that they will not be damaged during transportation due to poor packaging. The packaging shall comply with the provisions of JB/Z94. 7.1
The box shall be marked with:
Manufacturer name;
Porcelain bushing model;
Number of porcelain bushings;
Total weight of the packaging box;
"Handle with care", "Porcelain parts" and other words or indication marks. The porcelain bushings and porcelain parts shall have clear and firm manufacturer's trademarks and manufacturing years. 7.2
Each batch of porcelain bushings delivered shall be accompanied by a product certificate, which shall have the seal of the manufacturer's technical inspection department. Additional Notes:
This standard was proposed and managed by Zhuji Electrostatic Precipitator Research Institute, and was drafted by Jiujiang Electric Porcelain Factory. The main drafters of this standard are Qiu Yunchi and Zhang Hua.
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