CN213749430U

CN213749430U - Device for measuring glass strength at fixed cooling speed

Info

Publication number: CN213749430U
Application number: CN202022121050.9U
Authority: CN
Inventors: 申威
Original assignee: Irico Group Shaoyang Special Glass Co ltd
Current assignee: Irico Group Shaoyang Special Glass Co ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-07-20
Anticipated expiration: 2030-09-24

Abstract

The utility model relates to a device for measuring the glass strength at a fixed cooling speed, which comprises a fixing device, a falling body, a fan, a heater and a telescopic rod; the heater is fixedly arranged below the glass plate to be measured, the fan is arranged on one side of the glass plate to be measured in the horizontal direction, the fixing device is fixed right above the glass plate to be measured through the telescopic rod, and the fixing device is used for clamping a falling body. An iron plate is fixedly arranged above the heater and is parallel to the glass plate to be measured. The heater can heat the glass plate to simulate the temperature of the glass plate when the glass plate is discharged, and simultaneously, the stepless fan can blow air to the surface of the glass plate, so that the cooling air received when the glass plate is discharged is simulated. And at the moment, the falling body is used for hitting the glass plate from different heights, and the maximum falling body height which can be borne by the glass plate is the strength of the glass plate at the temperature. Finally, the strength of the glass plate at different temperatures can be obtained, and the temperature of the glass plate at the maximum strength is determined.

Description

Device for measuring glass strength at fixed cooling speed

Technical Field

The utility model belongs to overflow method production glass field specifically belongs to a measure device of glass intensity under fixed cooling rate.

Background

At present, the known overflow method for producing cover glass mainly comprises the following forming devices: a muffle furnace, a forming furnace and an annealing furnace. The glass material sequentially passes through a muffle furnace, a forming furnace and an annealing furnace in the flowing process from top to bottom, and the muffle furnace uniformly spreads out glass liquid to form a glass liquid plane with a certain thickness. The forming furnace cools and shapes the molten glass to form a solid glass ribbon.

After the glass ribbon flows out of the annealing furnace, a transverse scratch with a certain depth is cut on the continuously downward flowing glass ribbon by a cutter on the transverse cutting device according to a set time interval, and then the glass plate is broken along the scratch by a robot, so that the continuous glass ribbon is divided into glass plates with specific heights. Glass sheets are susceptible to breakage during separation, resulting in product loss and production discontinuities. It was found that the glass strength of the glass sheet as it was discharged had a great influence on the cutting process.

The cutting temperature of the glass plate when flowing out of the annealing furnace mouth is generally higher than 200 ℃, and if the temperature of the glass plate is increased, on one hand, the microcracks on the surface of the glass can be passivated, so that the strength of the glass plate is increased, and the difficulty in breaking the glass plate is caused. However, when the temperature of the glass sheet is lowered, thermal stress caused by a sudden temperature drop during discharging of the glass sheet increases, and the glass strength is lowered due to excessive thermal stress, thereby causing breakage of the glass sheet during separation. It follows that the strength of the glass is controlled by the tapping temperature of the glass sheet, and it is important to determine the proper tapping temperature of the glass sheet.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem existing in the prior art, the utility model provides a measure device of glass intensity under fixed cooling rate, simple structure, the operation of being convenient for can effectively measure the intensity of glass under the fixed cooling rate.

In order to achieve the above object, the utility model provides a following technical scheme:

a device for measuring the glass strength at a fixed cooling speed comprises a fixing device, a falling body, a fan, a heater and a telescopic rod;

the heater is fixedly arranged below the glass plate to be tested, the fan is arranged on one side of the glass plate to be tested in the horizontal direction, the fixing device is fixed right above the glass plate to be tested through the telescopic rod, and the fixing device is used for clamping a falling body.

Preferably, an iron plate is fixedly arranged above the heater and is parallel to the glass plate to be measured.

Preferably, the telescopic rod is provided with scale values.

Preferably, the fixing device is an electromagnet, and the falling body is made of iron.

Further, the falling body is a steel ball.

Further, the mass of the steel ball is not less than 50 g.

Preferably, a radiation thermometer is fixedly arranged on the side surface of the glass plate to be measured, and a probe of the radiation thermometer points to the glass plate to be measured.

Preferably, the glass plate testing device further comprises an anemometer which is arranged on the opposite surface of the fan relative to the glass plate to be tested.

Preferably, the area of the glass plate to be measured is not less than 10000mm 2.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the utility model relates to a measure device of glass intensity under fixed cooling rate, the heater can heat the glass board to simulate out the temperature when the glass board goes out of the stove, a stepless fan can blow to the glass board surface simultaneously, thereby simulate out the cooling air that the glass board received when going out of the stove. And at the moment, the falling body is used for hitting the glass plate from different heights, and the maximum falling body height which can be borne by the glass plate is the strength of the glass plate at the temperature. Finally, the strength of the glass plate at different temperatures can be obtained, and the temperature of the glass plate at the maximum strength is determined.

Furthermore, the iron plate is arranged above the heater, so that the heater can be protected from being damaged after glass of the heater is damaged, and the iron plate is convenient for heat conduction.

Furthermore, a scale value is arranged on the telescopic rod. The height of the falling body when falling is conveniently determined by the scale value, so that the accurate value of the optimal strength of the glass plate is conveniently calculated.

Furthermore, the fixing device is an electromagnet, and the falling body is made of iron. The electromagnet is adopted for fixing, so that the test operation of the current measuring device is convenient to control, and the automation is realized.

Further, the falling body is a steel ball. And the spherical falling object is adopted, so that the additional damage of sharp corners and the like to the glass is reduced, and the error of the measurement result is reduced.

Further, a radiation thermometer is fixedly arranged on a bracket on the side surface of the glass plate. The temperature of the glass plate can be conveniently and accurately measured, and the optimal strength at different temperatures can be obtained.

Furthermore, an anemoscope is arranged on the opposite surface of the glass plate to be tested of the fan. The wind speed of the fan is measured, so that the accurate surface wind speed of the glass plate flowing out of the annealing furnace can be simulated conveniently, and the measurement precision is improved.

Drawings

FIG. 1 is a schematic structural view of an apparatus for measuring the optimum strength of glass at a constant cooling rate according to the present invention;

in the drawings: 1 is a fixing device; 2 is a falling body; 3 is a fan; 4 is an anemometer; 5 is a glass plate to be detected; 6 is an iron plate; 7 is a heater; 8 is a telescopic rod.

Detailed Description

The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.

The utility model relates to a measure device of glass intensity under fixed cooling rate, including fixing device 1, whereabouts body 2, fan 3, heater 7 and telescopic link 8, the fixed below that sets up at the glass board 5 that awaits measuring of heater 7, fan 3 sets up the one side on the 5 horizontal direction of glass board that awaits measuring, fixing device 1 passes through telescopic link 8 to be fixed directly over the glass board 5 that awaits measuring, and fixing device 1 is used for centre gripping whereabouts body 2.

Can heat the glass board 5 that awaits measuring through heater 7 to simulate out the temperature when the glass board is out of the stove, a stepless fan 3 can blow to the glass board surface simultaneously, thereby simulate out the cooling air that the glass board received when coming out of the stove. At the moment, the falling bodies 2 are used for hitting the glass plate from different heights, and the maximum height of the falling bodies 2 which can be borne by the glass plate is the strength of the glass plate at the temperature. Finally, the strength of the glass plate at different temperatures can be obtained, and the temperature of the glass plate at the maximum strength is determined.

Examples

As shown in fig. 1, a device for measuring glass strength at a fixed cooling speed comprises an electromagnet fixing device, a steel ball, a fan 3, an anemometer 4, an iron plate 6, a heater 7 and a telescopic rod 8; the heater 7 is fixedly arranged below the glass plate 5 to be detected, the iron plate 6 is fixedly arranged between the heater 7 and the glass plate 5 to be detected, and the iron plate 6 is parallel to the glass plate 5 to be detected; the fan 3 is arranged on one side of the glass plate 5 to be detected in the horizontal direction, the anemoscope 4 is oppositely arranged on the other side of the glass plate to be detected, the electromagnet fixing device is fixed right above the glass plate 5 to be detected through the telescopic rod 8, and the electromagnet fixing device is used for clamping and adsorbing a steel ball. The telescopic rod 8 is provided with scale values. In the heavy duty, the steel balls fall from low to high until the glass sheet is broken. The mass of the steel ball is not less than 50 g. The size of the glass plate is not less than 100 x 100 mm.

First, the glass plate 5 to be measured is placed at the position shown in fig. 1, the switch of the heater 7 is turned on, heating a glass plate 5 to be measured, adjusting the current of a heater 7 to enable the temperature of the glass plate 5 to be measured to reach a certain value, adjusting the current of a fan 3 to enable the numerical value of an anemoscope 4 to be equal to the surface wind speed of the glass plate when the glass plate flows out of the annealing furnace, simulating the environment of fixing the cooling speed when the glass plate flows out of the annealing furnace, disconnecting a switch of an electromagnet fixing device, pounding a steel ball to the glass plate 5 to be measured, changing the height of the electromagnet fixing device on a telescopic rod 8, and performing a plurality of experiments, the strength of the glass plate 5 to be measured at the temperature can be obtained, the strength value is represented by a numerical value h on the height scale, the larger the height h required by crushing the glass plate by the steel ball is, the larger the strength of the glass plate is, and therefore the numerical value can directly show the relative strength of the glass plate. The iron plate 6 can protect the heater 7 from being broken by the steel ball, the iron plate 6 can protect the heater 7 from being damaged after the glass plate 5 to be detected is damaged, the heater 7 is not damaged, the iron plate 6 is convenient to conduct heat, and heating power of the heater 7 is not influenced.

The current of the heater 1 is changed for many times, and the maximum strength of the glass plate at different temperatures is obtained. The temperature of the glass plate 5 to be measured can be measured through the handheld radiation thermometer, the radiation thermometer can also be fixed on a metal support on the side face of the glass plate 5 to be measured to measure, a probe of the radiation thermometer points to the glass plate 5 to be measured, the temperature of the glass plate can be accurately measured conveniently, and the optimal strength under different temperatures can be obtained.

Claims

1. A device for measuring the glass strength at a fixed cooling speed is characterized by comprising a fixing device (1), a lower falling body (2), a fan (3), a heater (7) and a telescopic rod (8);

heater (7) are fixed to be set up in the below of awaiting measuring glass board (5), fan (3) set up the one side in the glass board (5) horizontal direction that awaits measuring, fixing device (1) is fixed directly over glass board (5) awaits measuring through telescopic link (8), and fixing device (1) is used for centre gripping whereabouts body (2).

2. The device for measuring the glass strength at the fixed cooling speed according to claim 1, wherein an iron plate (6) is fixedly arranged above the heater (7), and the iron plate (6) is parallel to the glass plate (5) to be measured.

3. A device for measuring the strength of glass at a constant cooling rate as claimed in claim 1, wherein the telescopic rod (8) is provided with scale values.

4. A device for measuring glass strength at a fixed cooling rate as claimed in claim 1, wherein the fixing means (1) is an electromagnet and the falling body (2) is made of iron.

5. An apparatus for measuring glass strength at a fixed cooling rate as claimed in claim 4, wherein the falling body (2) is a steel ball.

6. An apparatus for measuring glass strength at a fixed cooling rate as claimed in claim 5, wherein the mass of the steel ball is not less than 50 g.

7. An apparatus for measuring glass strength at a constant cooling rate as defined in claim 1, wherein a radiation thermometer is fixedly provided on a side surface of the glass sheet (5) to be measured, and a probe of the radiation thermometer is directed toward the glass sheet (5) to be measured.

8. A device for measuring glass strength at a fixed cooling rate according to claim 1, further comprising an anemometer (4), wherein the anemometer (4) is disposed on the opposite side of the fan (3) with respect to the glass sheet (5) to be measured.

9. An apparatus for measuring glass strength at a constant cooling rate as defined in claim 1, wherein the area of the glass sheet (5) to be measured is not less than 10000mm²。