Automatic annealing apparatus for thermoluminescence dosimeters

Abstract

The utility model relates to annealing equipment technical field, concretely relates to a kind of automatic annealing equipment of thermoluminescence dosimeter, including the furnace body for automatic return, the top of furnace body is movably connected with furnace cover, the bottom of furnace body is fixedly connected with the supporting leg for supporting furnace body;It further includes: heating plate, the inner chamber of furnace body is located in the heating plate, the heating plate is commonly provided with four groups, four groups The heating plate is distributed in circumferential array, the distance of the heating plate can be adjusted with furnace body center by moving, the distance adjustment of the heating plate is used to control temperature for the annealing of thermoluminescence dosimeter, four circumferential array distribution heating plate can be dynamically adjusted with furnace body center by high-temperature hydraulic cylinder distance, according to dosimeter size real-time adjustment heating range, the dynamic adjustment of heating plate distance is rotated with turntable driven rack, form uniform heating environment, avoid dosimeter local overheating or heating blind area, improve the stability of annealing quality.

Description

Technical Field

[0001] This utility model relates to the field of annealing equipment technology, and more specifically, to an automatic annealing device for a thermoluminescent dosimeter. Background Technology

[0002] In the production process of thermoluminescent dosimeters, annealing is a crucial step in eliminating residual radiation signals inside the dosimeter and ensuring measurement accuracy. Traditional thermoluminescent dosimeter annealing equipment typically suffers from the following technical problems:

[0003] Traditional equipment often uses fixed heating elements, making it impossible to adjust the heating position according to the size, shape, and annealing process requirements of the thermoluminescent dosimeter. This results in uneven temperature distribution during annealing of dosimeters of different specifications. Especially for small or irregularly shaped dosimeters, the distance between the heating plate and the center of the furnace is not adjustable, which can easily lead to local overheating or underheating, affecting the consistency of the dosimeter's sensitivity. Existing equipment lacks an active hot gas circulation structure, and heat transfer relies on natural convection. The temperature gradient inside the furnace is obvious, which not only prolongs the annealing time but also causes significant differences in the annealing effect of different parts of the dosimeter, making it difficult to meet the requirements of high-precision measurement. Utility Model Content

[0004] The purpose of this invention is to provide an automatic annealing device for a thermoluminescent dosimeter. Four sets of circumferentially arrayed heating plates can be dynamically adjusted in distance from the furnace center using a high-temperature hydraulic cylinder. The heating range is adjusted in real time according to the dosimeter size, ensuring optimal heat conduction between the heating plates and the dosimeter. This addresses the problem of traditional devices using fixed-installation heating elements, which cannot adjust the heating position according to the size, shape, and annealing process requirements of the thermoluminescent dosimeter. This results in uneven temperature distribution during annealing of dosimeters of different specifications, especially for small or irregularly shaped dosimeters, where the non-adjustable distance between the heating plates and the furnace center easily leads to localized overheating or insufficient heating, affecting the consistency of the dosimeter's sensitivity.

[0005] To achieve the above objectives, an automatic annealing device for a thermoluminescent dosimeter is provided, comprising a furnace body for automatic annealing, a furnace cover being movably connected to the top of the furnace body, and support legs for supporting the furnace body being fixedly connected to the bottom of the furnace body;

[0006] Also includes:

[0007] The heating plate is located inside the furnace body. There are four sets of heating plates arranged in a circular array. The distance between the heating plate and the center of the furnace body can be adjusted by moving the heating plate. The distance adjustment of the heating plate is used to control the temperature of the annealing of the thermoluminescent dosimeter.

[0008] As a further improvement to this technical solution, a side plate is provided on the outer side of the furnace body, and a connecting rod is fixedly connected to the inner side of the side plate, with one end of the connecting rod fixedly connected to the furnace body.

[0009] As a further improvement to this technical solution, a high-temperature resistant hydraulic cylinder is fixedly connected to the inner cavity of the side plate. The telescopic end of the high-temperature resistant hydraulic cylinder penetrates the furnace body and extends into the inner cavity of the furnace body. A docking plate is fixedly connected to one end of the high-temperature resistant hydraulic cylinder that extends into the inner cavity of the furnace body. The docking plate is fixedly connected to the heating plate.

[0010] As a further improvement to this technical solution, a mounting plate is fixedly connected to the bottom of the furnace body, a motor is fixedly connected to the top of the mounting plate, a steering box is fixedly connected to the output end of the motor through a coupling, a rotating rod is fixedly connected to the top of the steering box, and one end of the rotating rod passes through the bottom of the furnace body and extends into the inner cavity of the furnace body.

[0011] As a further improvement to this technical solution, a turntable is fixedly connected to one end of the rotating rod that extends into the inner cavity of the furnace. A storage rack for storing a thermoluminescent dosimeter is placed on the top of the turntable, and the storage rack is located at the center of the heating plate.

[0012] As a further improvement to this technical solution, a fan is fixedly connected to the top of the furnace cover, and an air outlet pipe is connected to the fan. The end of the air outlet pipe away from the fan passes through the furnace cover and extends into the inner cavity of the furnace body. The end of the air outlet pipe extending into the inner cavity of the furnace body is connected to a nozzle for hot air circulation.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. In this automatic annealing equipment for a thermoluminescent dosimeter, four sets of circumferentially arrayed heating plates can be dynamically adjusted in distance from the center of the furnace body by a high-temperature resistant hydraulic cylinder. The heating range is adjusted in real time according to the size of the dosimeter, so that the distance between the heating plate and the dosimeter is kept in the optimal heat conduction state. This solves the problem of poor temperature uniformity under the traditional fixed heating method, and ensures that the temperature field is consistent when dosimeters of different sizes are annealed. The dynamic adjustment of the heating plate distance, together with the turntable driving the placement rack to rotate, forms a uniform heating environment, avoids local overheating or heating blind spots of the dosimeter, and improves the stability of annealing quality.

[0015] 2. In this automatic annealing equipment for thermoluminescent dosimeters, the fan at the top of the furnace cover forms a hot air circulation system through the air outlet pipe and the nozzle, which actively drives the flow of hot air in the furnace and accelerates the uniform distribution of heat. Compared with the traditional natural convection method, it can improve the temperature uniformity in the furnace, shorten the annealing time, and significantly reduce energy consumption. The combination of hot air circulation and heating plate distance adjustment forms a composite temperature control mode of "dynamic heating + forced convection", which can not only adapt to the heating needs of dosimeters of different sizes, but also eliminate temperature dead zones through airflow disturbance. It is especially suitable for batch annealing of dosimeters with high density stacking.

[0016] 3. In this automatic annealing equipment for thermoluminescent dosimeters, there is no need to change the hardware structure. By adjusting the distance of the heating plates, it can be compatible with the annealing process of various dosimeter specifications. The equipment has strong versatility and reduces the equipment modification cost for enterprises. The standardized design of the hot gas circulation system can be adapted to different annealing temperature curves to meet diverse production needs. The automated adjustment process does not require manual intervention. Combined with the rotation function of the turntable, it realizes the full automation of the "loading-annealing-unloading" process, improving production efficiency while reducing human operation errors. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a front view of the furnace body of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the furnace body of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the heating plate of this utility model.

[0021] In the diagram: 1. Furnace body; 2. Furnace cover; 3. Support leg; 4. Mounting plate; 5. Motor; 6. Steering box; 7. Rotating rod; 8. Turntable; 9. Placement rack; 10. Side plate; 11. Connecting rod; 12. High-temperature resistant hydraulic cylinder; 13. Connecting plate; 14. Heating plate; 15. Fan; 16. Air outlet pipe; 17. Nozzle. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] This utility model provides an automatic annealing device for a thermoluminescent dosimeter, which includes the following components:

[0026] For details, please refer to Figures 1-4 As shown, the furnace includes a furnace body 1, a furnace cover 2, and support legs 3. The top of the furnace body 1 is movably connected to the furnace cover 2 via hinges or hinges, facilitating the loading and unloading of the thermoluminescent dosimeter; the support legs 3 at the bottom are welded from angle steel or rectangular steel pipes and fixed to the bottom surface of the furnace body 1 with bolts to ensure stable support of the equipment.

[0027] Four sets of heating plates 14 are arranged in a circular array inside the furnace body 1. Each set of heating plates 14 is fixedly connected to the telescopic end of the high-temperature resistant hydraulic cylinder 12 through a docking plate 13. The high-temperature resistant hydraulic cylinder 12 is embedded in the inner cavity of the side plate 10. The side plate 10 is welded and fixed to the outer wall of the furnace body 1 through a connecting rod 11 to form a stable support frame. When the high-temperature resistant hydraulic cylinder 12 extends or retracts, it pushes the docking plate 13 to drive the heating plate 14 to move radially and adjust its distance from the center of the furnace body 1.

[0028] This design allows for dynamic adjustment of the heating range based on the size of the dosimeter. For example, when processing small-sized dosimeters, the high-temperature hydraulic cylinder 12 retracts to bring the heating plate 14 closer to the center, shortening the distance to the dosimeter and enhancing heat transfer efficiency. When processing large-sized dosimeters, the high-temperature hydraulic cylinder 12 extends to expand the heating plate 14, covering a larger heating area. This avoids local overheating or insufficient heating caused by the non-adjustable distance of the traditional fixed heating plate 14, ensuring the uniformity of the temperature field during annealing of dosimeters of different specifications.

[0029] The bottom of the furnace body 1 is fixed with a motor 5 by a mounting plate 4. The output end of the motor 5 is connected to the steering box 6 via a coupling. The steering box 6 transmits the rotational power of the motor 5 to the rotating rod 7. The rotating rod 7 passes through the bottom of the furnace body 1 and extends into the inner cavity. The top of the rotating rod 7 is fixed with a turntable 8. The top surface of the turntable 8 is used to place a mounting rack 9 for carrying the dosimeter, and the mounting rack 9 is located at the center of the four sets of heating plates 14.

[0030] After the motor 5 starts, the power is transmitted to the rotating rod 7 through the steering box 6, which drives the turntable 8 to rotate at a constant speed. The placement frame 9 rotates synchronously with the turntable 8, so that the dosimeter is heated evenly during the annealing process.

[0031] The rotation of the turntable 8, combined with the distance adjustment of the heating plate 14, forms a composite heating mode of "dynamic heating + multi-angle thermal radiation". For example, when the heating plate 14 is fixed, the rotation of the turntable 8 can eliminate the single-sided heating deviation caused by the dosimeter being stationary; when the distance of the heating plate 14 is dynamically adjusted, the rotation action further enhances the temperature uniformity, avoids local temperature gradient differences, and improves the consistency of annealing quality.

[0032] A blower 15 is fixed on the top of the furnace cover 2. The blower 15 extends through the furnace cover 2 into the inner cavity of the furnace body 1 via an air outlet pipe 16. The end of the air outlet pipe 16 is connected to a nozzle 17, which faces the dosimeter area above the turntable 8.

[0033] After the blower 15 is started, it draws hot air from the furnace into the exhaust pipe 16 and sprays it out in a fan-shaped or ring-shaped airflow through the nozzle 17, forming a forced convection circulation of air in the furnace. The opening direction of the nozzle 17 and the rotation direction of the turntable 8 form a coordinated airflow, which accelerates the heat diffusion.

[0034] Traditional equipment relies on natural convection. The circulation system consisting of the fan 15 and the nozzle 17 can improve the temperature uniformity inside the furnace. For example, when the heating plate 14 is heating, the hot gas circulation system quickly transfers the heat from the high-temperature area to the low-temperature area. At the same time, the airflow disturbance breaks the thermal boundary layer on the surface of the dosimeter, shortens the annealing time, and reduces energy consumption.

[0035] Working principle:

[0036] Open the furnace cover 2 and place the thermoluminescent dosimeter in the groove or grid of the placement rack 9. The placement rack 9 is designed as a perforated plate or slot structure according to the shape of the dosimeter to ensure that the dosimeters do not overlap and are evenly distributed.

[0037] The high-temperature resistant hydraulic cylinder 12 extends and retracts according to the command, pushing the docking plate 13 to drive the heating plate 14 to move radially, so that the distance between the heating plate 14 and the surface of the dosimeter is kept at a suitable position.

[0038] The heating plate 14 is powered on and heated, and at the same time the fan 15 is started, which drives the air inside the furnace to circulate through the air outlet 16 and the nozzle 17, so that the temperature inside the furnace body 1 rises evenly to the preset annealing temperature.

[0039] When motor 5 starts, it drives rotating rod 7 through steering box 6 to rotate turntable 8, and the dosimeter on the placement rack 9 rotates at a constant speed with turntable 8.

[0040] The heating plate 14 continuously heats the area, while the high-temperature hydraulic cylinder 12 can finely adjust the distance of the heating plate 14 according to the temperature sensor feedback (not shown in the diagram): if the temperature in a certain area is too high, the system controls the corresponding heating plate 14 to move outward to reduce heat radiation; if the temperature is too low, the system controls the heating plate 14 to move inward to enhance heating.

[0041] The fan 15 maintains the circulation of hot air, and evenly delivers the heat generated by the heating plate 14 to all parts of the dosimeter, eliminating temperature dead zones.

[0042] After the preset annealing time is reached, the heating plate 14 is de-energized, while the fan 15 continues to run, accelerating the cooling inside the furnace through forced convection.

[0043] Once the furnace temperature has dropped to a safe range, turn off the blower 15 and motor 5, open the furnace cover 2, and remove the annealed dosimeter to complete one annealing process.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic annealing apparatus for a thermoluminescent dosimeter, comprising a furnace body (1) for automatic annealing, characterized in that: The top of the furnace body (1) is movably connected to a furnace cover (2), and the bottom of the furnace body (1) is fixedly connected to a support leg (3) for supporting the furnace body (1). Also includes: Heating plate (14) is located in the inner cavity of furnace body (1). There are four sets of heating plates (14) arranged in a circular array. The distance between the heating plate (14) and the center of the furnace body (1) can be adjusted by moving the heating plate (14). The distance adjustment of the heating plate (14) is used to control the annealing temperature of the thermoluminescent dosimeter.

2. The automatic annealing equipment for the thermoluminescent dosimeter according to claim 1, characterized in that: A side plate (10) is provided on the outer side of the furnace body (1), and a connecting rod (11) is fixedly connected to the inner side of the side plate (10). One end of the connecting rod (11) is fixedly connected to the furnace body (1).

3. The automatic annealing equipment for the thermoluminescent dosimeter according to claim 2, characterized in that: A high-temperature resistant hydraulic cylinder (12) is fixedly connected to the inner cavity of the side plate (10). The telescopic end of the high-temperature resistant hydraulic cylinder (12) passes through the furnace body (1) and extends into the inner cavity of the furnace body (1). A docking plate (13) is fixedly connected to one end of the high-temperature resistant hydraulic cylinder (12) extending into the inner cavity of the furnace body (1). The docking plate (13) is fixedly connected to the heating plate (14).

4. The automatic annealing equipment for the thermoluminescent dosimeter according to claim 1, characterized in that: The bottom of the furnace body (1) is fixedly connected to an installation plate (4), and the top of the installation plate (4) is fixedly connected to a motor (5). The output end of the motor (5) is fixedly connected to a steering box (6) via a coupling. The top of the steering box (6) is fixedly connected to a rotating rod (7). One end of the rotating rod (7) passes through the bottom of the furnace body (1) and extends into the inner cavity of the furnace body (1).

5. The automatic annealing equipment for the thermoluminescent dosimeter according to claim 4, characterized in that: A turntable (8) is fixedly connected to one end of the rotating rod (7) extending into the inner cavity of the furnace body (1). A rack (9) for storing a thermoluminescent dosimeter is placed on the top of the turntable (8). The rack (9) is located at the center of the heating plate (14).

6. The automatic annealing equipment for the thermoluminescent dosimeter according to claim 1, characterized in that: A blower (15) is fixedly connected to the top of the furnace cover (2). An air outlet pipe (16) is connected to the blower (15). The end of the air outlet pipe (16) away from the blower (15) passes through the furnace cover (2) and extends into the inner cavity of the furnace body (1). The end of the air outlet pipe (16) extending into the inner cavity of the furnace body (1) is connected to a nozzle (17) for hot air circulation.

Images