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CN-122010398-A - High-strength glass tube annealing equipment and annealing method

CN122010398ACN 122010398 ACN122010398 ACN 122010398ACN-122010398-A

Abstract

The invention relates to the technical field of glass annealing, in particular to high-strength glass tube annealing equipment and an annealing method, wherein the high-strength glass tube annealing equipment comprises an annular furnace body, a revolution mechanism, an inner wall temperature control assembly and a control and regulation assembly, the annular furnace body is sequentially divided into a heating zone, a heat preservation zone, a cooling zone and a loading and unloading zone along the circumferential direction through a partition plate, the loading and unloading zone is an opening section of the annular furnace body and is used for loading a glass tube to be annealed and discharging the annealed glass tube, the revolution mechanism can rotate along the axis of the annular furnace body, a rotation mechanism is arranged on the revolution mechanism, and a bearing frame used for bearing the glass tube is connected on the rotation mechanism.

Inventors

  • MA CHUNHUA
  • WANG BING
  • QI WEI
  • YU MENGMENG
  • ZHAO TINGTING

Assignees

  • 山东阿华医药材料科技有限公司

Dates

Publication Date
20260512
Application Date
20260311

Claims (9)

  1. 1. A high strength glass tube annealing apparatus, comprising; the annular furnace body (1), the annular furnace body (1) is sequentially divided into a heating area (12), a heat preservation area (13), a cooling area (14) and a loading and unloading area (15) along the circumferential direction through a partition plate (11), and the loading and unloading area (15) is an open section of the annular furnace body (1) and is used for feeding a glass tube to be annealed and discharging the annealed glass tube; the revolution mechanism can rotate along the axis of the annular furnace body (1), the revolution mechanism is provided with a rotation mechanism, and the rotation mechanism is connected with a bearing frame (2) for bearing the glass tube; The inner wall temperature control assembly comprises core rods (3) which are arranged in one-to-one correspondence with each glass tube, and the core rods (3) are pluggable and adaptive to the hollow cavity of the glass tube along the axial direction of the glass tube to be annealed through a lifting mechanism and are used for heating, heat preservation and cooling the inner wall of the glass tube; The control adjusting assembly comprises a first temperature sensor (31) arranged on the core rod (3), an electric heating wire (32) arranged inside the displacement core rod (3), a second temperature sensor (33) arranged in the annular furnace body (1) and a controller (4) electrically connected with the first temperature sensor (31) and the second temperature sensor, wherein the controller (4) is used for receiving temperature signals of the first temperature sensor (31) and the second temperature sensor (33), comparing temperature difference values of the inner wall and the outer wall of the glass tube, and controlling heating power change of the electric heating wire (32) when the temperature difference values exceed a set threshold value.
  2. 2. The high-strength glass tube annealing equipment according to claim 1, wherein the revolution mechanism comprises a first driving motor (5) and a first rotating shaft (51) connected with the output end of the first driving motor (5), and a supporting rotary table (52) connected with the annular furnace body (1) in a rotating mode is arranged on the first rotating shaft (51).
  3. 3. A high-strength glass tube annealing apparatus according to claim 2, wherein said rotation mechanism comprises a second driving motor (6) connected to said support turntable (52) and a second rotating shaft (61) connected to an output end of said second driving motor (6), said carrier (2) being fixedly connected to said second rotating shaft (61) and coaxially arranged with said second rotating shaft (61).
  4. 4. A high-strength glass tube annealing apparatus according to claim 3, wherein said lifting mechanism comprises a telescopic member (62) installed in the second rotating shaft (61) and a lifting plate (63) connected to a movable end of the telescopic member (62), said lifting plate (63) is slidably connected to the second rotating shaft (61), and said core rod (3) is connected to the lifting plate (63).
  5. 5. The high-strength glass tube annealing equipment according to claim 1, wherein an air blowing tube (7) is further arranged in the core rod (3), the input end of the air blowing tube (7) is rotationally connected with a first air tube (71), the input end of the first air tube (71) is connected with a total air tube (72) rotationally connected with the annular furnace body (1), and the total air tube (72) is connected with an external air source.
  6. 6. The high-strength glass tube annealing apparatus according to claim 5, wherein a position sensor (73) is provided in the cooling zone (14), a control valve (74) is provided on the first air tube (71), and the controller (4) is further configured to control the control valve (74) in the corresponding cooling zone (14) to be opened for blowing when receiving a signal of the position sensor (73).
  7. 7. A high strength glass tube annealing apparatus according to claim 5, wherein a bottom open end of said gas-blowing tube (7) is provided with a tapered flow guide portion (75) having a taper point upward.
  8. 8. The high-strength glass tube annealing equipment according to claim 1, wherein the material of the core rod (3) is high-temperature resistant ceramic, and the outer diameter of the core rod (3) is 1/3-1/2 of the inner diameter of the glass tube to be annealed.
  9. 9. A method of annealing a high strength glass tube annealing apparatus based on the high strength glass tube annealing apparatus according to claim 1 to 8, comprising the steps of: s1, feeding and matching the core rods (3), namely placing glass tubes to be annealed on a bearing frame (2) one by one, and driving a lifting disc (63) to drive the core rods (3) to be inserted along the axis of the glass tubes through a lifting mechanism; S2, the revolution and rotation start synchronously work, namely a first driving motor (5) drives a bearing turntable (52) to rotate along the axis of the annular furnace body (1) so that a bearing frame (2) revolves along with the bearing turntable (52), and a second driving motor (6) drives a second rotating shaft (61) and the bearing frame (2) to rotate around the axis of the bearing frame, so that a glass tube synchronously rotates along with the bearing frame (2) to realize uniform heating; s3, adjusting the temperature difference between the inner wall and the outer wall of the glass tube, wherein the temperature value of the inner wall of the glass tube fed back by the first temperature sensor (31) and the temperature in the annular furnace body (1) fed back by the second temperature sensor (33) are vertical, and the power of the heating wire (32) is finely adjusted in real time through the controller (4) to ensure that the temperature difference between the inner wall and the outer wall is always within a set threshold value; S4, discharging and resetting, namely when the glass tube is cooled and revolves to a loading and unloading area (15) along with the supporting turntable (52), closing a corresponding control valve (74) by the controller (4), simultaneously starting the lifting mechanism to drive the core rod (3) to be slowly pulled out of the glass tube, taking the annealed glass tube off the bearing frame (2) by an operator, placing a new glass tube to be annealed in place, and entering a next round of annealing circulation.

Description

High-strength glass tube annealing equipment and annealing method Technical Field The invention relates to the technical field of glass annealing, in particular to high-strength glass tube annealing equipment and an annealing method. Background The annealing is a key heat treatment process in glass manufacture, and is mainly divided into a heating stage, a heat preservation stage and a cooling stage, wherein the existing glass annealing equipment such as a tunnel annealing furnace and the like generally regulates and controls the temperature of the outer wall of a glass tube only through a heating element, a heat preservation layer or a cooling mechanism on the inner wall of the furnace body, and adopts linear conveying along the length direction of the furnace body, each part of the tube body of the glass tube is unevenly heated and cooled by heat, meanwhile, the heat exchange efficiency of the inner wall of the glass tube is far lower than that of the outer wall, in the heating stage, the outer wall is heated by the furnace body to reach the annealing temperature quickly, the inner wall can reach the similar temperature by delaying for a certain time due to air heat insulation lag, the temperature difference is formed to 20-35 ℃, the heat preservation stage is used for keeping the temperature stability by compensating the heating of the outer wall, the inner wall is easy to be higher than the outer wall by 10-20 ℃, and the cooling stage is used for quickly cooling the outer wall by a cold air curtain or a water cooling sleeve, and the inner wall cannot be discharged in time due to heat; the continuously existing difference between the inner wall and the outer wall can cause the easy formation of radial stress in the glass tube, and the glass tube is cracked and damaged in the subsequent cutting, processing or using process, thereby influencing the qualification rate of the product and the service life. Based on the above situation, we propose a high-strength glass tube annealing apparatus and annealing method to solve the above problems. Disclosure of Invention The invention provides high-strength glass tube annealing equipment and an annealing method, which are used for solving the problem that the temperature difference between the inner wall and the outer wall affects the subsequent processing quality when a glass tube is annealed in the prior art. The technical problems solved by the invention are realized by adopting the following technical scheme: The utility model provides a high strength glass tube annealing equipment, includes annular furnace body, revolution mechanism, inner wall temperature control subassembly and control adjusting part, annular furnace body has divided heating zone, heat preservation district, cooling district and loading and unloading district in proper order through the division board along the circumferencial direction, loading and unloading district is the open-ended section of annular furnace body for wait to anneal the material loading of glass tube and the ejection of compact of annealing back glass tube, revolution mechanism can rotate along annular furnace body axle center, be equipped with rotation mechanism on the revolution mechanism, just be connected with the carriage that is used for holding the glass tube on the rotation mechanism, inner wall temperature control subassembly includes the plug that sets up with every glass tube one-to-one, but the plug is fit for the cavity of glass tube along the axial plug of waiting to anneal the glass tube through elevating system for heat, keep warm and cool down the glass tube inner wall, control adjusting part is including locating first temperature sensor on the plug, the inside heating wire of displacement plug, locate the inside second temperature sensor of annular furnace and with first temperature sensor and second temperature sensor electric connection's controller, the controller is used for receiving first temperature sensor and second temperature sensor and temperature sensor temperature change when the temperature difference value exceeds the temperature difference value, the temperature difference value of the temperature sensor and the temperature of the outer wall temperature of the glass tube, and the temperature difference value of the temperature change when setting for the temperature value. Preferably, the revolution mechanism comprises a first driving motor and a first rotating shaft connected with the output end of the first driving motor, and a bearing turntable rotationally connected with the annular furnace body is arranged on the first rotating shaft. Preferably, the rotation mechanism comprises a second driving motor connected with the bearing turntable and a second rotating shaft connected with the output end of the second driving motor, and the bearing frame is fixedly connected to the second rotating shaft and is coaxially arranged with the second rotating shaft. Preferably, the lifting mechanis