Annealing device for medium borosilicate glass production

Abstract

The invention discloses a medium borosilicate glass production annealing device which comprises a shell and a conveyor, a plurality of gates are arranged in the shell from left to right at intervals, the gates divide the interior of the shell into a preheating section, a soaking section, a slow cooling section and a rapid cooling section, driving assemblies are installed on the gates, and the driving assemblies are connected with the conveyor. The driving assembly is used for controlling the opening degree of the gate; the air outlet of the rear preheating section is communicated with the interior of the front preheating section through a first flue; the soaking section air outlet is communicated with the interior of the preheating rear section through a second flue; and an air outlet of the slow cooling section is communicated with the interior of the soaking section through a third flue. The multiple gates are arranged, the driving assemblies on the gates can control the opening degrees of the gates, and therefore the temperature and airflow of all the sections can be adjusted according to needs. And meanwhile, through the arrangement of the flue, waste gas of all sections in the shell is recycled in a stepped mode, the external heat supply requirement is reduced, cyclic utilization of waste heat is achieved, and energy consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of medium-borosilicate glass production, and in particular to an annealing device for producing medium-borosilicate glass. Background Art

[0002] Medium borosilicate glass is a high-performance special glass widely used in pharmaceutical packaging, optical devices and other fields. Its production process mainly includes batching, melting, molding and annealing. The main raw materials of medium borosilicate glass include soda ash, borax, quartz sand, boric acid, etc. Melting is to melt the raw materials into glass liquid at high temperature. Molding is to make the glass liquid into the required shape and size through molds or tube drawing machines and other equipment. Annealing is to slowly cool the molded glass products at high temperature to eliminate internal stress and improve the thermal shock resistance and stability of the product.

[0003] Annealing of medium borosilicate glass is one of the most critical links in the production process, which directly affects the stress distribution, mechanical strength and chemical stability of the product. The annealing process of medium borosilicate glass usually includes four stages: preheating, soaking, slow cooling and fast cooling. In the existing annealing device, air will be introduced as a cooling medium during the slow cooling and fast cooling process. The hot air after heat exchange with the medium borosilicate glass generally enters the chimney through the exhaust duct and is discharged to the atmosphere. This part of the hot air is not well reused, resulting in low waste heat recovery efficiency and large energy waste. Summary of the invention

[0004] The object of the present invention is to provide a medium-borosilicate glass production annealing device to solve the problems mentioned in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides a medium borosilicate glass production annealing device, which includes a shell and a conveyor, wherein a plurality of gates are arranged at intervals from left to right inside the shell, and the plurality of gates divide the inside of the shell into a preheating section, a soaking section, a slow cooling section and a fast cooling section, and a drive assembly is installed on the gate, and the drive assembly is used to control the opening of the gate;

[0006] The preheating section has a preheating front section and a preheating rear section respectively, and the preheating front section and the preheating rear section are respectively provided with a first hot air blower and a second hot air blower, the air outlet of the preheating front section is connected to the chimney, and the air outlet of the preheating rear section is connected to the interior of the preheating front section through a first flue;

[0007] The heat equalization section is provided with a third hot air blower, and the air outlet of the heat equalization section is connected with the interior of the preheating rear section through the second flue;

[0008] The slow cooling section is provided with a fourth hot air blower, and the air outlet of the slow cooling section is connected with the interior of the equalizing section through the third flue;

[0009] The quick cooling section is provided with a first blower, and the air outlet of the quick cooling section is respectively connected with a first flue and a second flue, the first flue is connected with a chimney, and the second flue is connected with the interior of the preheating front section.

[0010] Furthermore, the first flue, the second flue, the first branch flue and the second branch flue are all provided with regulating valves.

[0011] Furthermore, the driving assembly includes a rotating shaft, a chain and a first motor, the pulley is installed inside the shell, the first end of the chain is fixedly connected to the rotating shaft, the second end of the chain is fixedly connected to the gate, and the first motor drives the rotating shaft to rotate.

[0012] Furthermore, the gate is divided into a gate frame and a gate plate, the gate frame is adapted to and connected to the interior of the shell, the gate plate is arranged in the gate frame and the top is connected to the chain, and the gate plate is slidably connected to the gate frame.

[0013] Furthermore, radiation plates are provided on the tops of the preheating section, the soaking section and the slow cooling section.

[0014] Furthermore, a lifting assembly is provided on the radiation plate, and the lifting assembly includes a guide shaft, a rack, a gear, and a second motor. The guide shaft is connected to the inner wall of the shell and is slidably connected to the radiation plate. The rack is fixedly mounted on the guide plate along the longitudinal direction. The gear is meshed with the gear bar and is rotatably connected to the inner wall of the shell. The second motor is used to drive the gear to rotate.

[0015] Furthermore, the conveyor is a mesh belt conveyor.

[0016] Furthermore, the end of the conveyor is longer than the shell and is a final cooling section, and the final cooling section is provided with a second blower.

[0017] The beneficial effects of the present invention are as follows: the present invention sets multiple gates, and the driving components on the gates can control the opening of the gates, so as to adjust the temperature and airflow of each section as needed to meet the annealing requirements of glass products of different specifications and types. At the same time, through the setting of the flue, the exhaust gas of each section inside the shell is recycled in stages to reduce the external heating demand, realize the recycling of waste heat, and reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of the local structure of an embodiment of the present invention.

[0020] Figure 3It is a schematic structural diagram of a lifting assembly according to an embodiment of the present invention.

[0021] Among them: 1. Shell; 2. Conveyor; 3. Gate; 4. Drive assembly; 5. Control valve; 6. Radiation plate; 7. Lifting assembly; 8. Final cooling section.

[0022] 11. Preheating section; 12. Soaking section; 13. Slow cooling section; 14. Fast cooling section; 31. Gate frame; 32. Gate plate; 41. Rotating shaft; 42. Chain; 71. Guide shaft; 72. Rack; 73. Gear; 81. Second blower.

[0023] 111, front section of preheating; 112, rear section of preheating; 113, first hot air blower; 114, second hot air blower; 115, first flue; 121, third hot air blower; 122, second flue; 131, fourth hot air blower; 132, third flue; 141, first blower; 142, first branch flue; 143, second branch flue 143. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiment is only one embodiment of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0025] In order to make the objectives, technical solutions and advantages of the present application more clear, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] In the following description, references to "one embodiment", "an embodiment", "an example", "an example", etc. indicate that the embodiment or example described in this way may include specific features, structures, characteristics, properties, elements or limitations, but not every embodiment or example necessarily includes the specific features, structures, characteristics, properties, elements or limitations. In addition, repeated use of the phrase "according to one embodiment of the present application" may refer to the same embodiment, but does not necessarily refer to the same embodiment.

[0027] like Figure 1-3 As shown, the present invention discloses a medium borosilicate glass production annealing device, which includes a shell 1 and a conveyor 2. A plurality of gates 3 are arranged from left to right inside the shell 1. The plurality of gates 3 divide the inside of the shell 1 into a preheating section 11, a soaking section 12, a slow cooling section 13 and a fast cooling section 14. A driving component 4 is installed on the gate 3, and the driving component 4 is used to control the opening of the gate 3.

[0028] The preheating section 11 includes a preheating front section 111 and a preheating rear section 112, and the preheating front section 111 and the preheating rear section 112 are respectively provided with a first hot air blower 113 and a second hot air blower 114. The air outlet of the preheating front section 111 is connected to the chimney, and the air outlet of the preheating rear section 112 is connected to the interior of the preheating front section 111 through a first flue 115.

[0029] The heat-averaging section 12 is provided with a third hot air blower 121, and the air outlet of the heat-averaging section 12 is connected to the interior of the preheating rear section 112 through the second flue 122;

[0030] The slow cooling section 13 is provided with a fourth hot air blower 131, and the air outlet of the slow cooling section 13 is connected to the interior of the equalizing section 12 through the third flue 132;

[0031] The quick cooling section 14 is provided with a first blower 141 , and the air outlet of the quick cooling section 14 is respectively connected to a first flue 142 and a second flue 143 , the first flue 142 is connected to the chimney, and the second flue 143 is connected to the interior of the preheating front section 111 .

[0032] In this embodiment, the inside of the shell 1 is separated into different temperature zones by four gates 3, namely the preheating section 11, the equalizing end, the slow cooling section 13 and the fast cooling section 14, wherein the entrance of the preheating section 11 is connected to the medium-borosilicate glass conveying device that needs to undergo an annealing process, and the airflow exchange amount is controlled by adjusting the opening to form a temperature gradient. For example: the gates 3 in the preheating section 11 and the equalizing section 12 are half open, so that the temperature of the post-preheating section 112 is consistent with that of the equalizing section 12; the minimum opening of the gates 3 in the equalizing section 12 and the slow cooling section 13, that is, the minimum opening that the medium-borosilicate glass products can pass through, thereby reducing heat loss; between the slow cooling section 13 and the fast cooling section 14, the gate 3 at the end of the fast cooling section 14 adjusts the opening of the gate 3 according to the temperature difference between the temperature zones to balance the waste heat recovery and sealing requirements.

[0033] The medium-borosilicate glass products enter the preheating front section 111, where the first hot air blower 113 provides hot air to preliminarily heat the medium-borosilicate glass products. The air outlet of the preheating front section 111 is connected to the chimney, and some exhaust gas can be discharged through the chimney. In the preheating rear section 112, the second hot air blower 114 further heats the medium-borosilicate glass products. The air outlet of the preheating rear section 112 is connected to the interior of the preheating front section 111 through the first flue 115, so as to realize the recycling of hot air and improve energy efficiency.

[0034] The medium borosilicate glass products passing through the preheating section 11 enter the soaking section 12. The third hot air blower 121 provides hot air in the soaking section 12 to ensure that the temperature of the medium borosilicate glass products is evenly distributed in the soaking section 12. The air outlet of the soaking section 12 is connected to the interior of the preheating rear section 112 through the second flue 122, and the hot air is continuously recycled, so that the temperature of the front end of the soaking section 12 and the preheating rear section 112 tend to be consistent.

[0035] The medium borosilicate glass product enters the slow cooling section 13 from the soaking section 12. The fourth hot air blower 131 provides relatively mild hot air in the slow cooling section 13 to slowly cool the medium borosilicate glass product to reduce internal stress. The air outlet of the slow cooling section 13 is connected to the interior of the soaking section 12 through the third flue 132, which serves as a supplementary heat source to improve its insulation effect and reduce the temperature difference in the soaking section 12.

[0036] Finally, the medium borosilicate glass products enter the rapid cooling section 14. The first blower 141 provides room temperature air in the rapid cooling section 14, so that the glass products are quickly cooled to room temperature or close to room temperature. The air outlet of the rapid cooling section 14 is divided into two parts: the first flue 142 is connected to the chimney for exhausting waste gas; the second flue 143 is connected to the interior of the preheating front section 111, allowing part of the cold air to be recycled, but the main purpose is to adjust the temperature of the preheating front section 111 and reduce the heating time of the preheating front section 111.

[0037] In addition, one-way valves can be installed on the air outlets of the hot air blower and blower and on the connecting pipes of each section to achieve more precise air volume control.

[0038] The present invention is provided with multiple gates 3, and the driving assembly 4 on the gate 3 can control the opening of the gate 3, so as to adjust the temperature and airflow of each section as needed to meet the annealing requirements of glass products of different specifications and types. At the same time, through the setting of the flue, the exhaust gas of each section inside the shell 1 is recycled in stages to reduce the external heating demand, realize the recycling of waste heat, and reduce energy consumption.

[0039] In one embodiment, the first flue 115, the second flue 122, the third flue 132, the first branch flue 142 and the second branch flue 143 are all provided with regulating valves 5. The air volume of each flue is accurately distributed by adjusting the opening of the regulating valve 5, thereby adjusting the temperature difference between each section. In addition, the regulating valve 5 can be a one-way valve to prevent hot air from flowing back.

[0040] In one embodiment, the driving assembly 4 includes a rotating shaft 41, a chain 42 and a first motor, the pulley is installed inside the housing 1, the first end of the chain 42 is fixedly connected to the rotating shaft 41, the second end of the chain 42 is fixedly connected to the gate 3, and the first motor drives the rotating shaft 41 to rotate, so as to adjust the opening of the gate 3. In this embodiment, the first motor is electrically connected to the controller, and the controller is a prior art and will not be described in detail here.

[0041] In one embodiment, the gate 3 is divided into a gate frame 31 and a gate plate 32. The gate frame 31 is adapted to the interior of the housing 1 and connected to the interior of the housing 1. The gate plate 32 is arranged in the gate frame 31 and connected to the chain 42 at the top. The gate plate 32 is slidably connected to the gate frame 31. That is, the first motor drives the rotating shaft 41 to rotate, thereby winding the chain 42, and the chain 42 pulls the gate plate 32 to move upward along the gate frame 31, and the opening of the gate 3 increases. Conversely, the first motor drives the rotating shaft 41 to rotate in the opposite direction, thereby releasing the chain 42, and the gate plate 32 moves downward along the gate frame 31, and the opening of the gate 3 decreases.

[0042] In one embodiment, a radiation plate 6 is provided on the top of the preheating section 11, the soaking section 12 and the slow cooling section 13. The first hot air blower 113, the second hot air blower 114, the third hot air blower 121 and the fourth hot air blower 131 provide hot air to each section for heating, and the radiation plate 6 (which can be made of silicon carbide) transfers heat to the surface of the borosilicate glass product by infrared radiation;

[0043] In one embodiment, a lifting assembly 7 is provided on the radiation plate 6 located above the conveyor 2. The lifting assembly 7 includes a guide shaft 71, a rack 72, a gear 73, and a second motor. The guide shaft 71 is connected to the inner wall of the housing 1 and is slidably connected to the radiation plate 6. The rack 72 is fixedly mounted on the guide plate in the longitudinal direction. The gear 73 is meshed with the gear 73 and is rotatably connected to the inner wall of the housing 1. The second motor is used to drive the gear 73 to rotate. In this embodiment, the second motor is electrically connected to the controller. The second motor is connected to the gear 73 through a synchronous wheel, a synchronous belt, and a connecting rod to drive the gear 73 to rotate.

[0044] The height of the radiation plate 6 above the conveying plate is adjusted according to the height of the medium borosilicate glass product and the temperature difference between the temperature zones, so that the temperature of each section is more uniform. That is, the second motor drives the gear 73 to rotate, and the gear 73 meshes with the rack 72, driving the radiation plate 6 to rise and fall along the guide shaft 71, thereby adjusting the height of the radiation plate 6.

[0045] In one embodiment, the conveyor 2 is a mesh belt conveyor 2, and the mesh design can better radiate heating or heat in both directions up and down.

[0046] In one embodiment, the end of the conveyor 2 is longer than the shell 1 and is the final cooling section 8, and the final cooling section 8 is provided with a second blower 81. That is, the medium-borosilicate glass products in the final cooling section 8 are exposed to the room temperature environment, and the second blower 81 is used to blow the room temperature air in the workshop to the medium-borosilicate glass products, so that the room temperature air is naturally convected, reducing the residual stress fluctuation of the medium-borosilicate glass products. In this embodiment, the second blower 81 is connected to the air supply duct, and the air supply duct has multiple air outlets on both the upper and lower sides of the conveyor belt.

[0047] The working process of the embodiment of the present invention is as follows:

[0048] The medium-borosilicate glass products enter the preheating front section 111, where the first hot air blower 113 provides hot air to preliminarily heat the medium-borosilicate glass products. The air outlet of the preheating front section 111 is connected to the chimney, and some exhaust gas can be discharged through the chimney. In the preheating rear section 112, the second hot air blower 114 further heats the medium-borosilicate glass products. The air outlet of the preheating rear section 112 is connected to the interior of the preheating front section 111 through the first flue 115, so as to realize the recycling of hot air and improve energy efficiency.

[0049] The medium borosilicate glass products passing through the preheating section 11 enter the soaking section 12. The third hot air blower 121 provides hot air in the soaking section 12 to ensure that the temperature of the medium borosilicate glass products is evenly distributed in the soaking section 12. The air outlet of the soaking section 12 is connected to the interior of the preheating rear section 112 through the second flue 122, and the hot air is continuously recycled, so that the temperature of the front end of the soaking section 12 and the preheating rear section 112 tend to be consistent.

[0050] The medium borosilicate glass product enters the slow cooling section 13 from the soaking section 12. The fourth hot air blower 131 provides relatively mild hot air in the slow cooling section 13 to slowly cool the medium borosilicate glass product to reduce internal stress. The air outlet of the slow cooling section 13 is connected to the interior of the soaking section 12 through the third flue 132, which serves as a supplementary heat source to improve its insulation effect and reduce the temperature difference in the soaking section 12.

[0051] The medium borosilicate glass products enter the rapid cooling section 14. The first blower 141 provides room temperature air in the rapid cooling section 14, so that the glass products are quickly cooled to room temperature or close to room temperature. The air outlet of the rapid cooling section 14 is divided into two parts: the first flue 142 is connected to the chimney for exhausting waste gas; the second flue 143 is connected to the interior of the preheating front section 111, allowing part of the cold air to be recycled, but the main purpose is to adjust the temperature of the preheating front section 111 and reduce the heating time of the preheating front section 111.

[0052] Finally, the medium-borosilicate glass products enter the final cooling section 8 and are exposed to the room temperature environment. The second blower 81 provides room temperature wind in the final cooling section 8 to allow natural convection of the room temperature air and reduce the residual stress fluctuation of the medium-borosilicate glass products.

[0053] The gate 3 between each section adjusts the gate 3 opening according to the temperature difference of each temperature zone to balance the waste heat recovery and sealing requirements. When adjusting the gate 3, the first motor drives the rotating shaft 41 to rotate, thereby winding the chain 42, and the chain 42 pulls the gate plate 32 to move upward along the gate frame 31, and the gate 3 opening increases. Conversely, the first motor drives the rotating shaft 41 to rotate in the opposite direction, thereby releasing the chain 42, and the gate plate 32 moves downward along the gate frame 31, and the gate 3 opening decreases.

[0054] The height of the radiation plate 6 above the conveying plate is adjusted according to the height of the medium borosilicate glass product and the temperature difference between the temperature zones, so that the temperature of each section is more uniform. That is, the second motor drives the gear 73 to rotate, and the gear 73 meshes with the rack 72, driving the radiation plate 6 to rise and fall along the guide shaft 71, thereby adjusting the height of the radiation plate 6.

[0055] The present invention is provided with multiple gates 3, and the driving assembly 4 on the gate 3 can control the opening of the gate 3, so as to adjust the temperature and airflow of each section as needed to meet the annealing requirements of glass products of different specifications and types. At the same time, through the setting of the flue, the exhaust gas of each section inside the shell 1 is recycled in stages to reduce the external heating demand, realize the recycling of waste heat, and reduce energy consumption.

[0056] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A medium borosilicate glass production annealing device, comprising a housing and a conveyor, characterized in that: A plurality of gates are arranged at intervals from left to right inside the shell, and the plurality of gates divide the inside of the shell into a preheating section, a soaking section, a slow cooling section and a fast cooling section. A driving assembly is installed on the gate, and the driving assembly is used to control the opening of the gate; The preheating section has a preheating front section and a preheating rear section respectively, and the preheating front section and the preheating rear section are respectively provided with a first hot air blower and a second hot air blower, the air outlet of the preheating front section is connected to the chimney, and the air outlet of the preheating rear section is connected to the interior of the preheating front section through a first flue; The heat equalization section is provided with a third hot air blower, and the air outlet of the heat equalization section is connected with the interior of the preheating rear section through the second flue; The slow cooling section is provided with a fourth hot air blower, and the air outlet of the slow cooling section is connected with the interior of the equalizing section through the third flue; The quick cooling section is provided with a first blower, and the air outlet of the quick cooling section is respectively connected with a first flue and a second flue, the first flue is connected with a chimney, and the second flue is connected with the interior of the preheating front section.

2. A medium borosilicate glass production annealing device according to claim 1, characterized in that: The first flue, the second flue, the first branch flue and the second branch flue are all provided with regulating valves.

3. The medium borosilicate glass production annealing device according to claim 1, characterized in that: The driving assembly includes a rotating shaft, a chain and a first motor. The pulley is installed inside the shell. The first end of the chain is fixedly connected to the rotating shaft, the second end of the chain is fixedly connected to the gate, and the first motor drives the rotating shaft to rotate.

4. A medium borosilicate glass production annealing device according to claim 3, characterized in that: The gate is divided into a gate frame and a gate plate. The gate frame is adapted to the interior of the shell and connected to the interior of the shell. The gate plate is arranged in the gate frame and the top is connected to the chain. The gate plate is slidably connected to the gate frame.

5. The medium borosilicate glass production annealing device according to claim 1, characterized in that: The tops of the preheating section, the soaking section and the slow cooling section are all provided with radiation plates.

6. The medium borosilicate glass production annealing device according to claim 5, characterized in that: The radiation plate is provided with a lifting assembly, which includes a guide shaft, a rack, a gear, and a second motor. The guide shaft is connected to the inner wall of the shell and is slidably connected to the radiation plate. The rack is fixedly mounted on the guide plate along the longitudinal direction. The gear is meshed with the gear bar and is rotatably connected to the inner wall of the shell. The second motor is used to drive the gear to rotate.

7. The medium borosilicate glass production annealing device according to claim 1, characterized in that: The conveyor is a mesh belt conveyor.

8. The medium borosilicate glass production annealing device according to claim 1, characterized in that: The end of the conveyor is longer than the shell and is a final cooling section, and the final cooling section is provided with a second blower.

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