CN213012556U - Large-size quartz glass plate continuous melting furnace - Google Patents
Large-size quartz glass plate continuous melting furnace Download PDFInfo
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- CN213012556U CN213012556U CN202021199717.0U CN202021199717U CN213012556U CN 213012556 U CN213012556 U CN 213012556U CN 202021199717 U CN202021199717 U CN 202021199717U CN 213012556 U CN213012556 U CN 213012556U
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Abstract
The invention discloses a large-size quartz glass plate continuous melting furnace, which comprises a furnace body and a furnace cover arranged at the top end of the furnace body, wherein a crucible is arranged in the furnace body, a former is arranged at the bottom end of the crucible, and a strip-shaped discharge hole is formed in the former; a charging opening is arranged above the furnace cover; a heating mechanism is arranged on the outer wall of the crucible; the bottom end of the furnace body is provided with a strip-shaped furnace opening corresponding to the discharge hole for outputting and passing the formed glass plate; a glass plate bearing mechanism is arranged below the furnace body. The continuous melting furnace realizes the production and processing of the large-size quartz glass plate, does not cause pollution to the quartz glass plate, and can ensure the production quality.
Description
Technical Field
The invention relates to the technical field of quartz smelting furnaces, in particular to a large-size quartz glass plate continuous smelting furnace.
Background
Quartz is a mineral resource with stable physical and chemical properties, and the crystal belongs to oxide minerals of trigonal crystal system, namely low-temperature quartz. The core rod is arranged in the continuous melting furnace for producing the quartz glass plate, so that the produced quartz glass is inevitably polluted to a certain degree when the quartz glass plate is produced, and the production quality of the quartz glass plate is influenced.
Meanwhile, the traditional production process of the quartz glass plate is to prepare a large-size quartz glass ingot (lead) by a vacuum electric melting method or a gas refining method, and then machine-process cutting and grinding are carried out to obtain the quartz glass plate. The process has low material utilization rate and high cost, and the quality of the obtained quartz glass plate is poor because bubbles are generated inside the large-size quartz glass ingot (lead) in the generation process. Especially, the large-size quartz glass plate has great production difficulty and the quality can not be ensured.
The thickness of the quartz glass plate produced by the intra-industry melting method is 5-50mm, the width is 5-320mm, and the large-size quartz glass plate cannot be produced. The method can only weld the small-size quartz glass plate produced by the continuous melting method to obtain the large-size quartz glass plate, and has the disadvantages of high cost and no guarantee of quality.
Disclosure of Invention
In view of the above-described drawbacks or disadvantages of the prior art, it is desirable to provide a large-sized continuous melting furnace for quartz glass plates, which ensures production quality without causing contamination of the quartz glass plates.
The invention provides a large-size quartz glass plate continuous melting furnace which is characterized by comprising a furnace body and a furnace cover arranged at the top end of the furnace body, wherein a crucible is arranged in the furnace body, a former is arranged at the bottom end of the crucible, and a strip-shaped discharge hole is formed in the former; a feeding port is arranged above the furnace cover; a heating mechanism is arranged on the outer wall of the crucible; the bottom end of the furnace body is provided with a strip-shaped furnace opening corresponding to the discharge hole, and a formed glass plate is output and passes through the furnace opening; a glass plate bearing mechanism is arranged below the furnace body; the glass plate bearing mechanism is a first mechanism or a second mechanism;
the first mechanism comprises bases which are symmetrically and fixedly arranged on two sides of the furnace mouth, one side, close to the glass plate, of each base is fixedly provided with an air cylinder, a piston rod of each air cylinder extends towards the glass plate, the end part of each piston rod is fixedly provided with a mounting frame, one side, close to the glass plate, of each mounting frame is provided with a plurality of receiving rollers, and each mounting frame is provided with a driving motor for driving the receiving rollers to synchronously rotate;
the second mechanism comprises symmetrical bases which are fixedly arranged on two sides of the furnace mouth, a horizontal lever is arranged at the top of each base, the middle of each lever is rotatably connected with the corresponding base through a shaft rod, a mounting frame is fixedly arranged at one end, close to the glass plate, of each lever, a plurality of bearing rollers are arranged on one side of each glass plate, a driving motor for driving the corresponding bearing rollers to rotate synchronously is arranged on the mounting frame, the lever is far away from one end of each glass plate, a weight box is fixedly arranged at one end of each glass plate, and a plurality of weight irons are arranged in the weight box.
Preferably, the first mechanism further comprises a controller, a pressure sensor is arranged in the receiving roller, and the pressure sensor and the air cylinder are both electrically connected with the controller.
Preferably, the second mechanism further comprises a controller and a display, a pressure sensor is arranged in the receiving roller, and the pressure sensor and the display are both electrically connected with the controller.
Preferably, a high-temperature-resistant anti-slip layer is arranged on the outer wall of the carrying roller.
Preferably, the heating mechanism comprises a heating net wrapped on the periphery of the crucible, and the heating net is electrically connected with a main electrode; and an auxiliary heating ring is arranged on the periphery of the bottom end of the crucible and electrically connected with an auxiliary electrode.
Preferably, the periphery of the heating mechanism in the furnace body is provided with high-temperature bricks, and heat-insulating sand is filled between the high-temperature bricks and the inner wall of the furnace body.
Preferably, the bottom end of the furnace body is positioned on the periphery of the furnace mouth and is provided with a cooling water device, and a smoke exhaust device is arranged below the cooling water device.
Compared with the prior art, the invention has the beneficial effects that:
(1) the large-size quartz glass plate continuous melting furnace provided by the invention cancels the arrangement of the core rod, avoids the condition that the glass plate is polluted by residues generated by the oxidation of the surface layer of the core rod, and ensures the production quality of the glass plate;
(2) the crucible is provided with a heating mechanism for heating in a step manner, and the crucible is divided into a preheating zone, a smelting zone and a forming zone. The heating net positioned in the smelting zone and the auxiliary heating ring positioned in the forming zone can be controlled to adopt different powers, so that quartz sand in the smelting zone is fully melted, surface gas lines and bubbles are reduced, and the surface quality is improved; the viscosity of the quartz glass melt at the bottom of the crucible can be adjusted to ensure the uniformity of the quartz glass tube;
(3) the glass plate supporting mechanism is arranged below the furnace body, when a large-size quartz glass plate is produced, due to the fact that the dead weight of the glass plate is large, the falling speed of the glass plate is too high, accidents are prone to occurring, the glass plate supporting mechanism can effectively reduce the pulling speed of the glass plate, and accidents caused by the fact that the glass plate directly falls from a furnace mouth due to too large weight are avoided;
(4) breaks through the existing secondary processing molding, can adopt continuous melting to produce large-size quartz glass plates, and has the advantages of low cost, high efficiency and good quality compared with a two-step method.
It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of any embodiment of the invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
FIG. 1 is a schematic structural view of a large-size continuous melting furnace for quartz glass plates according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of another large-sized continuous melting furnace for quartz glass plates according to an embodiment of the present invention.
Reference numbers in the figures: 11. a glass plate; 12. a furnace body; 13. a crucible; 14. a former; 15. a feed inlet; 16. a heating mechanism; 17. a glass sheet receiving mechanism; 18. a cooling water device; 19. a fume extractor; 21. A furnace cover; 22. a furnace mouth; 23. high-temperature bricks; 24. heat-insulating sand; 61. heating the net; 62. a main electrode; 63. An auxiliary heating ring; 64. an auxiliary electrode; 71. a base; 72. a cylinder; 73. a piston rod; 74. a mounting frame; 75. a receiving roller; 76. an anti-slip layer; 77. a lever; 78. a rotating shaft; 79. a weight box.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 2, an embodiment of the present invention provides a large-sized continuous melting furnace for quartz glass plates, which includes a furnace body 12 and a furnace cover 21 disposed at a top end of the furnace body 12, wherein a crucible 13 is disposed in the furnace body 12, a former 14 is disposed at a bottom end of the crucible 13, and a strip-shaped discharge hole is disposed on the former 14; a charging opening 15 is arranged above the furnace cover 21; a heating mechanism 16 is arranged on the outer wall of the crucible 13; the bottom end of the furnace body 12 is provided with a strip-shaped furnace opening 22 corresponding to the discharge hole for outputting and passing the formed glass plate 11; a glass plate receiving mechanism 17 is provided below the furnace body 12.
In this embodiment, in order to sufficiently melt the quartz sand used as the raw material for manufacturing the quartz glass plate, the required temperature is 1800-.
A former 14 is provided at the bottom of the crucible 13, and the molten quartz is shaped and discharged through a discharge port of the former 14. Aiming at producing the large-size quartz glass plate, the width of the discharge port is set to be 360-1000mm, and the thickness is set to be 30-120mm, so that the large-size quartz glass plate with the width of 300-900mm, the thickness of 30-120mm and the maximum length of 5000mm can be produced.
When producing a quartz glass plate with an oversize size of 550mm wide and 60mm thick, the glass plate 11 is controlled by the glass plate supporting mechanism 17 to output at a speed of 2-3 cm/min. As the size of the glass sheet 11 being produced decreases, the speed of the down draw of the glass sheet 11 can be increased by adjusting the glass sheet receiving mechanism 17. The formed size of the glass sheet 11 is inversely related to the draw speed.
In a preferred embodiment, as shown in fig. 1, the glass plate receiving mechanism 17 includes bases 71 symmetrically and fixedly disposed on two sides of the furnace opening 22, a cylinder 72 is fixedly disposed on one side of the base 71 close to the glass plate 11, a piston rod 73 of the cylinder 72 extends toward the glass plate 11, a mounting bracket 74 is fixedly disposed at an end of the piston rod 73, a plurality of receiving rollers 75 are disposed on one side of the mounting bracket 74 close to the glass plate 11, and a driving motor for driving the plurality of receiving rollers 75 to rotate synchronously is disposed on the mounting bracket 74. The glass plate receiving mechanism 17 further comprises a controller, a pressure sensor is arranged in the receiving roller 75, and the pressure sensor and the air cylinder 72 are both electrically connected with the controller.
In this embodiment, automatic control of the output of the cylinder 72 is achieved through the provision of a pressure sensor and a controller. According to empirical data in actual production, the corresponding down-drawing speeds of the quartz glass plates with different sizes are obtained. By controlling the output of the air cylinder 72, the pressure between the receiving roll 75 and the glass sheet 11 is adjusted to achieve a corresponding down draw speed for the glass sheet 11.
The pressure sensor can feed back the pressure between the carrying roller 75 and the glass plate 11 to the controller, so that the controller can judge the pressure and then adjust the output of the air cylinder 72. The automation performance of the equipment is effectively improved, and the control precision of the glass plate supporting mechanism 17 is enhanced.
The controller is a master device for controlling the starting, speed regulation, braking and reversing of the motor by changing the wiring of a main circuit or a control circuit and changing the resistance value in the circuit according to a preset sequence. The system consists of a program counter, an instruction register, an instruction decoder, a time sequence generator and an operation controller, and is a decision mechanism for issuing commands, namely, the decision mechanism is used for coordinating and commanding the operation of the whole computer system.
In a preferred embodiment, as shown in fig. 1, the glass sheet receiving mechanism 17 includes a base 71 symmetrically and fixedly disposed at two sides of the fire hole 22, a horizontal lever 77 is disposed at a top of the base 71, a middle portion of the lever 77 is rotatably connected to the base 71 through a shaft rod 78, a mounting frame 74 is fixedly disposed at an end of the lever 77 close to the glass sheet 11, a plurality of receiving rollers 75 are disposed at one side of the mounting frame 74 close to the glass sheet 11, a driving motor for driving the plurality of receiving rollers 75 to rotate synchronously is disposed on the mounting frame 74, a weight box 79 is fixedly disposed at an end of the lever 77 away from the glass sheet 11, and a plurality of weight irons are disposed in the weight. The glass plate receiving mechanism 17 further comprises a controller and a display, a pressure sensor is arranged in the receiving roller 75, and the pressure sensor and the display are electrically connected with the controller.
In this embodiment, the pressure between the receiving roll 75 and the glass sheet 11 can be monitored by the pressure sensor and the controller. According to empirical data in actual production, the corresponding down-drawing speeds of the quartz glass plates with different sizes are obtained. The pressure between the receiving roll 75 and the glass sheet 11 is adjusted by adjusting the weight box 79 by increasing or decreasing the number of the weight irons, so that the glass sheet 11 obtains a corresponding down-draw speed.
The pressure sensor feeds back the pressure between the uptake roll 75 and the glass sheet 11 to the controller, which is displayed on the display in real time, thereby providing a total weight for the weight box 79. The pressure control between the receiving roller 75 and the glass sheet 11 is effectively achieved.
In a preferred embodiment, as shown in fig. 1 and 2, a high temperature resistant non-slip layer 75 is provided on the outer wall of the uptake roller 75. The friction between the carrying roller 75 and the glass plate 11 can be effectively improved, the extrusion force is reduced, the load of equipment operation is reduced, and the service life of the equipment is prolonged.
In a preferred embodiment, as shown in fig. 1 and 2, the heating mechanism 16 comprises a heating mesh 61 disposed on the outer periphery of the crucible 13, the heating mesh 61 being electrically connected to a main electrode 62; an auxiliary heating ring 63 is provided on the outer periphery of the bottom end of the crucible 13, and an auxiliary electrode 64 is electrically connected to the auxiliary heating ring 63.
In the present embodiment, the heating mechanism 16 is provided with a double-layer heating system, and the energy is supplied through the main electrode 62 and the auxiliary electrode 64, respectively, so that the output control can be performed, and the step heating of the heating region is realized by adjusting the respective output powers.
The heating mechanism 16 with step heating divides the heating area in the crucible 13 into a preheating area, a melting area and a forming area, the quartz sand is preheated and then enters the melting area to be melted, the temperature of the melting area is controlled at 1800 plus 2400 ℃, so that the quartz sand is melted more fully, and the internal air is fully discharged. The temperature of the fused quartz is properly reduced through the molding zone, the temperature of the molding zone is controlled to be 1800 plus 2100 ℃, the molding of the product is facilitated, and the heating molding effect of the graded heating mechanism 19 is better.
A preheating zone is formed above the area covered by the heating net 61 of the heating mechanism 16, and the quartz sand entering the crucible 13 through the charging opening 15 is preheated; the area covered by the heating net 61 forms a melting area, and the quartz sand entering the area is melted; the area covered by the auxiliary heating ring 63 forms a molding area, the fused quartz glass melt is cooled to a certain degree after entering the molding area, the viscosity of the melt is adjusted, the melt can be molded and pulled out, and the uniformity of the product is ensured.
In a preferred embodiment, as shown in fig. 1 and 2, a high temperature brick 23 is disposed on the outer periphery of the heating mechanism 16 in the furnace body 12, and heat-insulating sand 24 is filled between the high temperature brick 23 and the inner wall of the furnace body 12. The heat preservation is carried out in the furnace body 12, the heat loss is reduced, and the heating effect is enhanced.
In a preferred embodiment, as shown in fig. 1 and 2, a cooling water device 18 is arranged on the periphery of the furnace mouth 22 at the bottom end of the furnace body 12, and a smoke exhaust device 19 is arranged below the cooling water device 18.
In this embodiment, the cooling water device 18 may be a water jacket, which is disposed at the furnace opening 22 to prevent the furnace opening 22 from being oxidized, and at the same time, a relatively low temperature region is formed at the furnace opening 22 to properly cool the output glass plate 11, which is beneficial to forming the glass plate 11;
the fume extractor 19 can be a high-temperature induced draft fan, is arranged at the furnace mouth 22, and can exhaust impurities generated in the production process of the quartz glass plate through air draft.
In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. A large-size quartz glass plate continuous melting furnace is characterized by comprising a furnace body and a furnace cover arranged at the top end of the furnace body, wherein a crucible is arranged in the furnace body, a former is arranged at the bottom end of the crucible, and a strip-shaped discharge hole is formed in the former; a feeding port is arranged above the furnace cover; a heating mechanism is arranged on the outer wall of the crucible; the bottom end of the furnace body is provided with a strip-shaped furnace opening corresponding to the discharge hole, and a formed glass plate is output and passes through the furnace opening; a glass plate bearing mechanism is arranged below the furnace body; the glass plate bearing mechanism is a first mechanism or a second mechanism;
the first mechanism comprises bases which are symmetrically and fixedly arranged on two sides of the furnace mouth, one side, close to the glass plate, of each base is fixedly provided with an air cylinder, a piston rod of each air cylinder extends towards the glass plate, the end part of each piston rod is fixedly provided with a mounting frame, one side, close to the glass plate, of each mounting frame is provided with a plurality of receiving rollers, and each mounting frame is provided with a driving motor for driving the receiving rollers to synchronously rotate;
the second mechanism comprises symmetrical bases which are fixedly arranged on two sides of the furnace mouth, a horizontal lever is arranged at the top of each base, the middle of each lever is rotatably connected with the corresponding base through a shaft rod, a mounting frame is fixedly arranged at one end, close to the glass plate, of each lever, a plurality of bearing rollers are arranged on one side of each glass plate, a driving motor for driving the corresponding bearing rollers to rotate synchronously is arranged on the mounting frame, the lever is far away from one end of each glass plate, a weight box is fixedly arranged at one end of each glass plate, and a plurality of weight irons are arranged in the weight box.
2. The continuous melting furnace of claim 1, wherein the first mechanism further comprises a controller, wherein a pressure sensor is disposed in the uptake roll, and the pressure sensor and the cylinder are both electrically connected to the controller.
3. The continuous melting furnace of claim 1, wherein the second mechanism further comprises a controller and a display, a pressure sensor is disposed in the uptake roll, and both the pressure sensor and the display are electrically connected to the controller.
4. Continuous smelting furnace according to any one of claims 2 or 3, characterized in that the outer wall of the receiving roll is provided with a high temperature resistant non-slip layer.
5. The continuous melting furnace according to claim 4, wherein the heating mechanism comprises a heating net wrapped around the outer periphery of the crucible, the heating net being electrically connected to a main electrode; and an auxiliary heating ring is arranged on the periphery of the bottom end of the crucible and electrically connected with an auxiliary electrode.
6. The continuous melting furnace according to claim 5, wherein a high-temperature brick is provided on an outer periphery of the heating means in the furnace body, and heat-insulating sand is filled between the high-temperature brick and an inner wall of the furnace body.
7. The continuous melting furnace according to claim 6, wherein a cooling water device is provided on the outer periphery of the furnace mouth at the bottom end of the furnace body, and a smoke exhaust device is provided below the cooling water device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021199717.0U CN213012556U (en) | 2020-06-24 | 2020-06-24 | Large-size quartz glass plate continuous melting furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021199717.0U CN213012556U (en) | 2020-06-24 | 2020-06-24 | Large-size quartz glass plate continuous melting furnace |
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| CN213012556U true CN213012556U (en) | 2021-04-20 |
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| CN202021199717.0U Active CN213012556U (en) | 2020-06-24 | 2020-06-24 | Large-size quartz glass plate continuous melting furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113336417A (en) * | 2021-05-22 | 2021-09-03 | 程东卫 | Quartz glass smelting furnace |
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2020
- 2020-06-24 CN CN202021199717.0U patent/CN213012556U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113336417A (en) * | 2021-05-22 | 2021-09-03 | 程东卫 | Quartz glass smelting furnace |
| CN113336417B (en) * | 2021-05-22 | 2022-12-23 | 盛吉盛精密制造(绍兴)有限公司 | Quartz glass continuous melting furnace |
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