SU1231059A1 - Method of heat treatment of hardened glassware - Google Patents

Description

The invention relates to the glass industry, in particular to the production of hardened insulating parts of suspended glass insulators operating under high and very high voltages.

The purpose of the invention is to reduce the duration of the process with high quality products by increasing their mechanical strength.

During heat treatment according to the inventive method, the tempered glass products are exposed to increased positive

thermal shock (20 - 440-600 ° С together su-15 spirit) at a temperature of 400, 420, 440,

existing 20–260–320 C) with an increase of 1–5 min, which also leads, along with an increase in the impact mechanical strength of products, to a more effective rejection (destruction) of hardened products with internal defects causing spontaneous destruction of products increase the reliability of their service.

Example. Heat treatment of glass tempered insulating parts of insulators is carried out. Chemical, 604, 480, 500, 520, 540, 560, 580, 600 C. Rejection of defective glass products is faster than higher heat treatment temperatures.

20 The insulating parts of glass insulators that have undergone heat treatment are subjected to impact mechanical strength tests at two points — in the outer and in the inner parts.

25 heads.

The test results are shown in Table. one.

320

The existing mode 40 0.1-0.3 5.52

Short-term high-temperature mode

1 3 5

1 3 3 5

13

3

12

12 12

12 6

12 18

12

12 6

12

insulating glass composition %: SiOj 72.5; , 2.5; CaO 7.6; MgO 3.6; Na., 0 9.4; 4.0; 0.1; SOj 0.3.

The insulating parts of the suspended high-voltage insulators of tempered glass, heated to, are quenched for 7 minutes at a pressure of 2940 Pa in the upper part and 5680 Pa in the lower part. Then, part of the insulators is subjected to standard heat treatment, the other is placed in an intense air flow {in a chamber with forced circulation of hot air, 480, 500, 520, 540, 560, 580, 600 C. Rejection of defective glass products is faster than heat treatment temperature.

The insulating parts of glass insulators that have undergone heat treatment are subjected to impact mechanical strength tests at two points — in the outer and in the inner parts.

heads.

The test results are shown in Table. one.

Table 1

1.90

1.90 1.90 2.10

1.90 2.15 2.35 2.35 3.35

2.40 2.40 2.44

From tab. 1 it follows that for multi-thickness glass products of a complex configuration with a thickness of 12–16 mm (which are the insulating parts under Continued Table.

weight insulators) the most optimal heat treatment conditions are those listed in Table. 2

Tables a

,

Temperature,

ContinuedSpeed

thermal air conditioning, processing, min i m / s

iiiiiiiiiiiiiiiiiiiiiiitiiiiiiiir

440 3 6-12

5 2

3 1

12 6-12

12 12

6-12

Editor E. Kopcha

Compiled by N, Sokolova

Tehred N. Bonkalo Proofreader A. Tsk

Order 2523/30 Circulation 457 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Continued table. 2

The application of the proposed method provides a 10-fold reduction in heat treatment time, a 0.20% reduction in losses from spontaneous destruction, and an increase in the strength, reliability and durability of high-voltage glass insulators.

Claims (1)

METHOD FOR THERMAL TREATMENT OF HARDENED GLASS PRODUCTS by heating in air, characterized in that, in order to reduce the duration of the process and increase impact strength, heating is carried out to 440-600 ° C for 1-5 min at an air speed of 6-12 m / s . ’1231