Boron diffusion heating device for photovoltaic cell

Abstract

The utility model discloses a photovoltaic cell boron diffusion heating device, which relates to the technical field of boron diffusion heating, and adopts the technical scheme that the photovoltaic cell boron diffusion heating device comprises a heating box, a box door is arranged on one side of the heating box, the top of the box door is hinged with the heating box, a silicon boat is arranged in the heating box, a feeding and discharging mechanism is arranged at the bottom of the silicon boat, and the feeding and discharging mechanism can drive the silicon boat to enter and exit from the heating box. The feeding and discharging mechanism comprises a linkage rod, two gears, two racks, two guide rails and two connecting rods, and the two ends of the linkage rod are movably connected with the two ends of the heating box through bearings respectively. And meanwhile, the feeding and discharging mechanism is in linkage with the box door, the box door can be opened synchronously during discharging, the operator can take the materials conveniently, the operation steps of feeding and taking the materials are greatly simplified, the safety performance is improved, and the practicability is extremely high.

Description

Technical Field

[0001] The utility model relates to the technical field of boron diffusion heating, in particular to a photovoltaic cell boron diffusion heating device. Background Art

[0002] Boron diffusion is a commonly used process for preparing photovoltaic cells. The principle is to introduce boron as an impurity into the surface of silicon wafers to form p-type silicon, thereby improving the conversion efficiency and output power of photovoltaic cells. The diffusion temperature and time determine the boron doping depth of the silicon wafer and the thickness of the p-type silicon layer formed. It also affects the depth distribution and diffusion rate of carbon. Therefore, the heating device plays a very important role in the boron diffusion process.

[0003] When using the existing photovoltaic cell boron diffusion heating device, the staff needs to place the cell silicon wafers on the silicon boat, and then send the silicon boat into the heating box. Both the feeding and retrieving operations are cumbersome, especially when retrieving materials, there is a greater risk of burns, and automatic material delivery cannot be achieved, so improvement is needed. Summary of the invention

[0004] To this end, the utility model provides a photovoltaic cell boron expansion heating device, which solves the problems mentioned in the above background technology by setting a material feeding and discharging mechanism.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a photovoltaic cell boron expansion heating device, comprising a heating box, a box door is provided on one side of the heating box, the top of the box door is hinged to the heating box, a silicon boat is provided inside the heating box, and a material inlet and outlet mechanism is provided at the bottom of the silicon boat, and the material inlet and outlet mechanism can drive the silicon boat in and out of the heating box;

[0006] The feeding and discharging mechanism includes a linkage rod, two gears, two racks, two guide rails and two connecting rods. The two ends of the linkage rod are movably connected to the two ends of the heating box through bearings. The two gears are coaxially arranged with the linkage rod and are fixedly connected to the two ends thereof. The two guide rails are fixedly connected to the inner walls of the two ends of the heating box. The bottoms of the two racks are meshed with the two gears respectively. The tops of the two racks are provided with guide grooves. The two racks are slidably connected to the two guide rails through the two guide grooves respectively. One end of the top of the two racks is fixedly connected with a connecting sleeve, and one side of the two connecting sleeves is fixedly connected with a rod a. Both ends of the box door are fixedly connected with a fixing plate, and the opposite side of the two fixing plates is fixedly connected with a rod b. The two ends of the two connecting rods are movably hinged with the two rods a and the rod b respectively.

[0007] Preferably, a synchronization rod is provided between the two racks, and two ends of the synchronization rod are respectively fixedly connected to the sides of the two racks.

[0008] Preferably, both ends of the bottom of the silicon boat are fixedly connected with connection blocks, and the two connection blocks match the two connection sleeves.

[0009] Preferably, a bolt is provided on one side of the connecting sleeve, and the bolt passes through the connecting sleeve and the connecting block and is threadedly connected to the two.

[0010] Preferably, a motor is provided at one end of the outside of the heating box, and the output shaft of the motor is fixedly connected to one end of a linkage rod.

[0011] Preferably, a support block is fixedly connected to the inner bottom wall of the heating box, and the middle portion of the linkage rod is movably connected to the top of the support block via a bearing.

[0012] Preferably, a sealing rubber ring is provided on one side of the box door close to the heating box.

[0013] Preferably, sliders are fixedly connected to both sides of the two racks, and inner walls at both ends of the heating box are provided with sliding grooves for the sliders to slide.

[0014] The utility model embodiment has the following advantages:

[0015] The utility model provides a feeding and discharging mechanism, which can deliver the silicon boat out of the heating box after heating is completed, thereby reducing the risk of operators being easily scalded when taking materials from the inside. At the same time, the feeding and discharging mechanism is linked with the box door, and the box door can be opened synchronously when the materials are discharged, which is convenient for the operator to take the materials. The feeding and discharging operation steps are greatly simplified, the safety performance is improved, and the practicability is extremely strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0018] Figure 1 The overall structural diagram provided by the utility model;

[0019] Figure 2A sectional view of the overall structure provided by the utility model;

[0020] Figure 3 A schematic diagram of the explosion structure provided by the utility model;

[0021] Figure 4 This is a side structural sectional view provided by the utility model.

[0022] In the figure: 1. Heating box; 2. Box door; 3. Silicon boat; 4. Linkage rod; 5. Gear; 6. Rack; 7. Guide rail; 8. Connecting rod; 9. Connecting sleeve; 10. Rod a; 11. Fixed plate; 12. Rod b; 13. Synchronous rod; 14. Connecting block; 15. Bolt; 16. Motor; 17. Support block; 18. Sealing rubber ring; 19. Slider. DETAILED DESCRIPTION

[0023] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the 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 scope of protection of the present invention.

[0024] Refer to the attached Figure 1 - Attachment Figure 4 The utility model provides a photovoltaic cell boron expansion heating device, comprising a heating box 1, a box door 2 is provided on one side of the heating box 1, the top of the box door 2 is hinged to the heating box 1, a silicon boat 3 is provided inside the heating box 1, and a material inlet and outlet mechanism is provided at the bottom of the silicon boat 3, and the material inlet and outlet mechanism can drive the silicon boat 3 to enter and exit the heating box 1;

[0025] The feeding and discharging mechanism includes a linkage rod 4, two gears 5, two racks 6, two guide rails 7 and two connecting rods 8. The two ends of the linkage rod 4 are movably connected to the two ends of the heating box 1 through bearings. The two gears 5 are coaxially arranged with the linkage rod 4 and are fixedly connected to the two ends thereof. The two guide rails 7 are fixedly connected to the inner walls of the two ends of the heating box 1 respectively. The bottoms of the two racks 6 are meshed with the two gears 5 respectively. The tops of the two racks 6 are provided with guide grooves. The two racks 6 are slidably connected to the two guide rails 7 respectively through the two guide grooves. The top ends of the two racks 6 are fixedly connected with a connecting sleeve 9, and one side of the two connecting sleeves 9 is fixedly connected with a rod a10. The two ends of the box door 2 are fixedly connected with a fixing plate 11, and the opposite sides of the two fixing plates 11 are fixedly connected with a rod b12. The two ends of the two connecting rods 8 are movably hinged with the two rods a10 and the rod b12 respectively.

[0026] In this embodiment, the guide rail 7 plays a role of sliding support and guidance for the rack 6 .

[0027] In order to achieve the purpose of synchronous linkage, the device adopts the following technical solution: a synchronization rod 13 is provided between the two racks 6, and the two ends of the synchronization rod 13 are respectively fixedly connected to the sides of the two racks 6;

[0028] In order to achieve the purpose of rapid assembly and disassembly, the device is implemented by the following technical solutions: both ends of the bottom of the silicon boat 3 are fixedly connected with connecting blocks 14, the two connecting blocks 14 match the two connecting sleeves 9, and a bolt 15 is provided on one side of the connecting sleeve 9, and the bolt 15 passes through the connecting sleeve 9 and the connecting block 14 and is threadedly connected to the two;

[0029] Among them, in order to achieve the purpose of driving, the device adopts the following technical solutions: a motor 16 is provided at one end of the outside of the heating box 1, the output shaft of the motor 16 is fixedly connected to one end of the linkage rod 4, a support block 17 is fixedly connected to the bottom wall of the heating box 1, and the middle part of the linkage rod 4 is movably connected to the top of the support block 17 through a bearing, and the support block 17 can play a certain supporting role;

[0030] In order to achieve the purpose of sealing the heating box 1, the device adopts the following technical solutions: a sealing rubber ring 18 is provided on the side of the box door 2 close to the heating box 1. The sealing rubber ring 18 has high heat insulation performance and can effectively achieve sealing and maintain the internal heat of the heating box 1;

[0031] In order to prevent the rack 6 from slipping, the device adopts the following technical solution: sliders 19 are fixedly connected to both sides of the two racks 6, and grooves for the sliders 19 to slide are provided on the inner walls at both ends of the heating box 1.

[0032] The use process of the utility model is as follows: when the user needs to take materials, the motor 16 switch can be turned on, and the output shaft of the motor 16 drives the linkage rod 4 and the two gears 5 to rotate, thereby driving the two racks 6 to translate along the guide rail 7 to the outside of the heating box 1, thereby driving the silicon boat 3 to move to the outside of the heating box 1 through the connecting sleeve 9 and the connecting block 14, and at the same time, through two connecting rods 8 that are respectively hinged to the two rods a10 and the rod b12, the box door 2 can be pushed to flip along the hinge with the heating box 1, so as to open the door until the slider 19 moves from one end of the slide groove to the other end and can no longer translate. At this time, the box door 2 is opened, the silicon boat 3 is sent to the outside of the heating box 1, and the user can start the material taking operation.

[0033] The above is only a preferred embodiment of the utility model. Any person skilled in the art may modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. A photovoltaic cell boron diffusion heating device, comprising a heating box (1), characterized in that: A door (2) is provided on one side of the heating box (1), the top of the door (2) is hinged to the heating box (1), a silicon boat (3) is provided inside the heating box (1), and a material inlet and outlet mechanism is provided at the bottom of the silicon boat (3), and the material inlet and outlet mechanism can drive the silicon boat (3) in and out of the heating box (1); The feeding and discharging mechanism comprises a linkage rod (4), two gears (5), two racks (6), two guide rails (7) and two connecting rods (8); the two ends of the linkage rod (4) are movably connected to the two ends of the heating box (1) through bearings; the two gears (5) are coaxially arranged with the linkage rod (4) and are respectively fixedly connected to the two ends; the two guide rails (7) are respectively fixedly connected to the inner walls of the two ends of the heating box (1); the bottoms of the two racks (6) are respectively meshed with the two gears (5); the tops of the two racks (6) are open. A guide groove is provided, and the two racks (6) are slidably connected to the two guide rails (7) through the two guide grooves respectively; one end of the top of the two racks (6) is fixedly connected to a connecting sleeve (9); one side of the two connecting sleeves (9) is fixedly connected to a rod a (10); both ends of the box door (2) are fixedly connected to a fixing plate (11); the opposite side of the two fixing plates (11) is fixedly connected to a rod b (12); and both ends of the two connecting rods (8) are movably hinged to the two rods a (10) and the rod b (12) respectively.

2. A photovoltaic cell boron diffusion heating device according to claim 1, characterized in that: A synchronization rod (13) is provided between the two racks (6), and two ends of the synchronization rod (13) are respectively fixedly connected to the sides of the two racks (6).

3. A photovoltaic cell boron diffusion heating device according to claim 1, characterized in that: Both ends of the bottom of the silicon boat (3) are fixedly connected with connection blocks (14), and the two connection blocks (14) match the two connection sleeves (9).

4. A photovoltaic cell boron diffusion heating device according to claim 3, characterized in that: A bolt (15) is provided on one side of the connecting sleeve (9), and the bolt (15) passes through the connecting sleeve (9) and the connecting block (14) and is threadedly connected to the two.

5. A photovoltaic cell boron diffusion heating device according to claim 1, characterized in that: A motor (16) is provided at one end of the outside of the heating box (1), and an output shaft of the motor (16) is fixedly connected to one end of a linkage rod (4).

6. A photovoltaic cell boron diffusion heating device according to claim 1, characterized in that: The inner bottom wall of the heating box (1) is fixedly connected to a support block (17), and the middle portion of the linkage rod (4) is movably connected to the top of the support block (17) via a bearing.

7. A photovoltaic cell boron diffusion heating device according to claim 1, characterized in that: A sealing rubber ring (18) is provided on one side of the box door (2) close to the heating box (1).

8. A photovoltaic cell boron diffusion heating device according to claim 1, characterized in that: Slide blocks (19) are fixedly connected to both sides of the two racks (6), and inner walls at both ends of the heating box (1) are provided with sliding grooves for the slide blocks (19) to slide.

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