This standard specifies the type and size, technical requirements, test methods, inspection rules, packaging and marking of rod-shaped porcelain shafts for electrostatic precipitators (hereinafter referred to as porcelain shafts). This standard is applicable to porcelain shafts for electrostatic precipitators with rated DC voltages of 60, 72, 80, 100KV and operating temperatures not higher than 150, 250℃, and installation locations with an altitude not exceeding 1000m. JB/T 5909.2-1991 Porcelain shafts for electric precipitators with porcelain insulators JB/T5909.2-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Porcelain Insulators for Electrostatic Precipitators
Rod-shaped Porcelain Shafts
1 Subject Content and Scope of Application
JB/T5909.2-91
This standard specifies the type and size, technical requirements, test methods, inspection rules, packaging and marking of sample-shaped porcelain shafts (hereinafter referred to as porcelain shafts) for electrostatic precipitators.
This standard applies to porcelain shafts for electrostatic precipitators with rated voltages of 60, 72, 80, 100 kV and operating temperatures of 150 and 250 °C, and the installation site is not more than 1000 m above sea level.
2 Reference Standards
GB775.1~775.3| |tt||JB/Z262
JB3384
JB/Z94bzxZ.net
3 Types and dimensions
Technical conditions for high-voltage insulator porcelain
Test methods for insulators
Electrical terminology insulators
Ultrasonic detection of internal defects in porcelain
Sampling methods for high-voltage insulators
Insulator product packaging
3.1 The porcelain shaft shall be manufactured according to the drawings approved by the prescribed procedures, and its type and main dimensions shall comply with the provisions of Figures 1 to 4 and Table 1 respectively.
Approved by the Ministry of Machinery and Electronics Industry on December 25, 1991 and implemented on October 1, 1992
JB/T 5909.2-91
JN-07201A
JN-07202A
IN-07203A
JN-08001C
JN-08002C
JN-10001C
The model of the porcelain shaft is indicated as follows;
4 Technical requirements
JB/T5909.2-91
Main dimensions of porcelain shaft
4—M10
4—M17
Working temperature code: A indicates working temperature of 150℃; C indicates working temperature of 250℃
Product design serial number: Two Arabic numerals are used to indicate the rated voltage, kV
Rod-shaped porcelain shaft for electrostatic precipitator||t t||4.1 The appearance quality of the porcelain shaft should comply with the relevant provisions of GB772. 4.2 The cross-section of the porcelain shaft should be homogeneous and dense, and there should be no penetration after the porosity test. The pressure during the porosity test should not be less than 20MPa, and the product of pressure and time should not be less than 180MPa·h. 4.3 The porcelain shaft should be glued with a special high-temperature resistant adhesive. The surface of the metal accessories in contact with the adhesive should be coated with a high-temperature resistant buffer layer. A buffer pad should be placed between the end face of the porcelain part and the metal accessories. The metal accessories should be rust-proofed, and the screw holes should be coated with anti-rust oil. 4.4 The parallelism of the two end faces of the metal accessories and the coaxiality of the central axis of the mounting hole should not exceed 2mm. 4.5 The porcelain shaft parts should be subjected to ultrasonic flaw detection inspection one by one before gluing. There should be no defects that can be found by ultrasonic waves (such as cracks, pores and layers, etc.) inside the porcelain parts.
The ceramic shaft shall be able to withstand 10s of torsion load test without damage, and the load during the test is 600N·m. 4.6
The torsion failure load of the ceramic shaft shall not be less than 1000N·m. The ceramic shaft shall be able to withstand 3 temperature cycle tests with a temperature difference of 60K without damage. 4.8
9The ceramic shaft shall be able to withstand 1h of high temperature electromechanical load test without damage or flashover. The temperature, torsion load and DC test voltage during the test shall comply with the provisions of Table 2. When the power frequency AC voltage is used instead of the DC voltage for the test, the voltage value shall be the same. Table 2 High temperature electromechanical load test values
JN-07201A
JN-07202A
JN-07203A
JN-08001C
JN-08002C
JN-10001C
Rated DC voltage
80~100
Test temperature
DC test voltage
Torsion load
5 Test method
5.1 Torsion (destructive) load test
JB/T5909.291
Install the specimen on the testing machine and make sure that the specimen is not subjected to bending moment. During the test, the load should be raised to the rated torsion load evenly and without impact. For each test, the load is maintained for 10 seconds. The specimen should not be damaged, the adhesive cracked, or the metal accessories should not have obvious permanent deformation, and there should be no obvious displacement between the components. For the torsional damage load test, the load is increased until it is damaged. The load value at this time is the torsional damage load value.
5.2 Temperature cycle test
The temperature cycle test of the ceramic shaft is carried out in accordance with the provisions of GB775.1. 5.3 Porosity test
The porosity test of the ceramic shaft is carried out in accordance with the provisions of GB775.1. 5.41h High temperature electromechanical load test
The clean and dry specimen is installed on the test machine, and the specimen should not be subjected to bending moment. The voltage is applied between the two poles of the specimen, and the distance between the specimen and the high-voltage electrode and the inner wall of the test machine is not less than one times the dry flashover distance of the specimen. During the test, the test temperature should reach the temperature value specified in this standard (the specimen must be placed at this temperature for more than 40 minutes), and the torsional load is increased to 1000N·m at a uniform and impact-free speed. Then apply DC (or AC) voltage to the value specified in the standard, keep it for 1 minute without flashover, and continue to keep it under this mechanical load for 1 hour. The sample should not be damaged. During the entire test process, the working temperature should be kept within the temperature range specified in this standard.
6 Inspection rules
6.1 The porcelain shaft should be inspected and accepted by the quality inspection department of the manufacturer. The manufacturer should ensure that all porcelain shafts delivered meet the requirements of this standard. 6.2 According to the inspection rules specified in this standard, the user has the right to inspect whether the technical indicators of the porcelain shaft meet the requirements of this standard. 6.3
Porcelain shafts should be inspected and accepted in batches. The same model of porcelain shafts made by the same process method is a batch, and the number of each batch shall not exceed 100.
6.4 The inspection of porcelain shafts is divided into individual inspection, sampling inspection and type test. 6.4.1 Individual inspection
Individual inspection should be carried out according to the provisions of Table 3. If any of the requirements specified in Table 3 are not met, the porcelain shaft is unqualified. Table 3 Inspection contents of ceramic shafts one by one
Inspection item number
6.4.2 Sampling inspection
Inspection item name
Appearance inspection
Dimension inspection
Ultrasonic flaw detection inspection
Torsion load test
Inspection requirements
Article 4.1 of this standard
Article 3.1 of this standard
Article 4.5 of this standard
Article 4.6 of this standard 6 Articles
Inspection methods
JB/Z262
Article 5.1 of this standard
Sampling inspection shall be carried out after each test is passed. Two specimens shall be randomly selected and the inspection shall be carried out in accordance with the provisions of Table 4. The piece-rate double sampling plan shall be adopted. The sampling rules and judgment procedures shall comply with the provisions of JB3384. If one specimen does not meet any of the requirements specified in Table 4 during the inspection, twice the number of specimens shall be selected from the same batch of products for re-inspection. If there is still one specimen that does not meet any of the requirements in Table 4, the batch of porcelain shafts is unqualified. 8
Inspection item number
6.4.3 Type test
Inspection item name
Temperature cycle test
Torsional destructive load test
Pore gland test
JB/T 5909.291
Contents of sampling inspection for porcelain shaft
Inspection requirements
Article 4.8 of this standard
Article 4.7 of this standard
Article 4.2 of this standard
Number of specimens
All specimens after the first inspection
Porcelain after the second inspection
One piece for each specimen
Inspection method
Article 5.2 of this standard
Article 5.1 of this standard
Article 5.3 of this standard
When new products are trial-formed or the structure of normal products is modified, the raw material formula and process methods are changed, type tests must be carried out. The number of specimens for type tests shall not be less than 4, and shall be carried out according to Table 5 after each test is passed. Table 5
Contents of type test for ceramic shaft
Test item number
Test item name
Temperature cycle test
1h high temperature electromechanical load test
Porosity test
Test requirements
Article 4.8 of this standard
Article 4.9 of this standard
Article 4.2 Articles
Number of samples
Porcelain after the second test
One piece for each sample
Test method
Article 5.2 of this standard
Article 5.4 of this standard
Article 5.3 of this standard
During the type test, if one sample does not meet any of the requirements specified in Table 5, the type test fails. 7 Packaging and marking
Porcelain shafts should be packed in wooden boxes and ensure that they will not be damaged due to poor packaging during transportation. The packaging should comply with the provisions of JB/Z94, and the packaging box should be marked with:
Manufacturer name;
Porcelain shaft model;
Total weight of the packaging box;
d. "Handle with care", "Porcelain parts" and other words or other signs. 7.2 The porcelain shaft porcelain parts should have clear and solid manufacturer's trademarks and manufacturing years. 3 Each batch of porcelain shafts delivered should be accompanied by a product certificate, which should be stamped by the manufacturer's quality inspection department. 7.3
Additional Notes:
This standard was proposed and managed by Zhuji Electrostatic Precipitator Research Institute. This standard was drafted by Shaanxi Tongchuan Electric Porcelain Factory. The main drafters of this standard are Li Musen and Zhao Jincai. 9
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