This standard applies to pressure oil supply tanks used in conjunction with AC 110~330kV oil-paper insulated self-contained oil-filled cables, referred to as pressure tanks. In addition to complying with the provisions of this standard, the pressure tank should also comply with the requirements of GB 9326.1 "General Provisions for Oil-Paper Insulated Self-Contained Oil-Filled Cables and Accessories AC 330KV and Below". GB 9326.5-1988 Oil-paper insulated self-contained oil-filled cables and accessories pressure oil supply tank for AC 330 kV and below GB9326.5-1988 Standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
Oil-filled paper-insulated cables and accessories for alternating voltages up to AC 330kV and below
Pressure oil supply tank
Oil-filled paper-insulated cables and accessories foralternating voltages up to and including 330 kV Pressure tanks | the provisions of its Annex.
1 Scope of application
1.1 This standard applies to pressure oil supply tanks used in conjunction with AC 110~330kV oil-paper insulated self-contained oil-filled cables, referred to as pressure tanks.
1.2 In addition to complying with the provisions of this standard, the pressure box shall also comply with the requirements of GB9326.1 "General Provisions for Oil-Paper Insulated Self-Contained Oil-Filled Cables and Accessories for AC 330kV and Below".
2 Usage characteristics
2.1 The upper limit of the working oil pressure range of the pressure tank shall not be higher than 0.4MPa, and the lower limit shall not be lower than 0.02MPa. 2.2 The pressure box is suitable for indoor and outdoor installation and use. When used outdoors, sunshade and rainproof devices must be added. 2.3 The ambient temperature of use should generally not be lower than -15°C. 3 Materials
3.1 Manganese steel
should be made of high-quality carbon steel or steel with equivalent performance that meets the requirements of GB699 "Technical Conditions for High-Quality Carbon Structural Steel". 3.2 Insulating oil
shall comply with the provisions of Table 4 of GB9326.2 "Oil-paper insulated self-contained oil-filled cables and accessories oil-paper insulated self-contained oil-filled cables for AC 330kV and below".
3.3 Steel plate
Steel plates that comply with the requirements of GB247 "Ordinary Carbon Steel" or steel plates with equivalent properties should be used. 4Models and specifications
Product models and specifications are specified in Table 1.
National Machinery Industry Commission approved 1989-01-01 implementation on 1988-05-23
name
name
pressure oil supply tank
5 technical requirements| |tt||5.1 elastic element
GB9326.5--88
Table 1
Type
No.
CYXY1
Oil supply Amount, L
50
100
150
200
5.1.1 The elastic element is a sealed cake made of corrugated diaphragm and support ring It is a shaped component filled with carbon dioxide gas under a certain pressure. 5.1.2 The elastic element should have good sealing properties. It should not leak when filled with 0.15~0.2MPa gas, and should not deform or leak after withstanding 10,000 fatigue tests.
5.2 Insulating oil
5.2.1 After the pressure box has been cleaned, filled with oil and stored for 72 hours, take out the oil sample for power frequency breakdown voltage and tg tests. It should meet the following requirements: Working at room temperature The frequency voltage breakdown strength should be greater than 50kV/2.5mm; when the oil temperature is 100±1℃ and the electric field gradient is 1kV/mm, the tgo of the oil should be less than 0.003. 5.3 Insulated connecting pipe
Insulated connecting pipe should withstand the requirements of GB9326.2 Voltage test specified in Table 15 in Sections 7.2.6 and 7.4.7 without breakdown or flashover. 5.4 Pressure gauge
5.4.1 The pressure indication error of the pressure gauge at any point above 10% and below 90% of the maximum gauge value scale shall not be greater than 1% of the maximum scale. In the remaining scale range, the pressure indication error shall be Not greater than 1.5% of the maximum scale. 5.4.2 The deviation of the trigger pressure of the alarm pressure gauge relative to the standard set value shall not be greater than ±2% of the full scale value. 5.5 Box shell
The box shell is welded by steel plates. The welds should be airtight and oxidized color is allowed. 5.6 Pressure box
5.6.1 The assembled pressure box, together with valves, gauges, etc., should be airtight. There should be no leakage after 8 hours when 1.1 times the design maximum pressure is added at ambient temperature.
5.6.2 The oil supply volume of the pressure tank should not be less than 90% of the nominal oil supply volume represented by the pressure tank oil supply characteristic curve. 6 Test items and methods
6.1 Test items and methods are specified in Table 2. 6.2 Elastic element fatigue test
The elastic element is installed in a special fixture. Each elastic element is filled with (0.03 + 0.01) MPa pressure and carbon dioxide or compressed air at the same time, put it into the test device, and adjust the electrical joint pressure gauge. The test pressure automatically changes from the gauge pressure of 0.05 to 0.3MPa, the frequency is not less than 1 time/min, and the test is performed 10,000 times. The elastic element should not deform or leak. Table 2
Sequence
1
2
3
4
5
No.
Test Project
Pressure tank hydraulic test
Insulated connecting pipe voltage test
Oil power frequency breakdown and tgo test
Fatigue test of elastic components||tt| |Pressure tank oil supply characteristics test
Standard provisions
5.6.1
5.3
5.2
5.1.2
5.6.2
Test type
T, R
Ts
T, R
Ts
T, Swww.bzxz.net
Test method
Article 5.6.1 of this standard
Article 5.3 of this standard
GB507
Article 6.2 of this standard
Article 6.3 of this standard|| tt||6.3 Pressure tank oil supply characteristics test
GB9326.5-88
The pressure tank is filled with oil so that its pressure reaches the upper limit of the working oil pressure range. Measure the amount of oil released each time the pressure drops by 0.25×10\Pa gauge pressure, and proceed in this manner until it reaches the lower limit of the working oil pressure range of the pressure tank. The total amount of oil released one after another is the oil supply amount of the pressure tank. At the same time, use the pressure as the ordinate and the discharged oil amount as the abscissa to draw the oil supply characteristic curve of the pressure tank. 7 Acceptance Specifications
7.1 Each product must be inspected by the technical inspection department of the manufacturer. It must be qualified before leaving the factory, and shall be accompanied by a product quality certificate. 7.2 The manufacturer shall inspect and accept purchased parts such as pressure gauges in accordance with Article 5.4, and provide test certificates to users. 7.3 Products shall be inspected and accepted according to the test items specified in Table 2. 7.4 The fatigue test of elastic components should be carried out randomly according to the number of punched batches, and the sampling of each batch should not be less than 5. If the test fails: the reasons for failure should be analyzed; if it is a material problem, this batch of elastic components cannot be used; if it is a welding problem, the process should be improved and can only be used after passing the retest.
7.5 For the pressure tank oil supply characteristics test, 10% of the contract supply quantity shall be sampled for testing, but the number of samples shall not be less than 2 in any case. If the test fails, double the sample should be taken and retested. If the retest still fails, the products should be inspected one by one and unqualified products shall not leave the factory. 7.6 The withstand voltage test of insulated connecting pipes should be conducted on a sampling basis of 10% of each batch. If the test fails, double the sample should be taken for retest. If the retest still fails, the products should be inspected one by one. Unqualified products shall not leave the factory. 7.7 Products that do not comply with Article 5.2 should be reprocessed, replaced with new oil, and can only leave the factory after passing the test. 8 Packaging, transportation and marking
8.1 Each product must have a product label fixed at an obvious and appropriate location, and indicate the following: a.
Manufacturer name:
Product name, Model, specification;
b.
c.
Product factory number, date;
d.
Oil supply curve;
e.
Product weight.
8.2 Product packaging should be packed in packaging boxes, and the products should be firmly fixed in the packaging boxes. 8.3 The outside of the packaging box should have the following obvious text marks: manufacturer name;
b.
c
product name, specification, model;
receiving unit, Address;
Net weight, gross weight, box number, shape, size; d.
et
words and symbols such as lifting line, "center of gravity", "no inversion allowed". 8.4 The product should be accompanied by a product inspection certificate, product manual, and oil supply characteristic curve. 8.5 The pressure box should be stored in a clean and dry place and should not be exposed to sunlight. Additional notes:
This standard is under the jurisdiction of Shanghai Cable Research Institute. This standard was drafted by Shanghai Cable Research Institute, Shanghai Cable Factory, Shenyang Cable Factory, etc. The main drafter of this standard is Sang Jiming.
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