Supporting rod anti-rotation device

Abstract

The utility model discloses a supporting rod anti-rotation device which comprises an anti-rotation fixed part, a rotating pin, a cover plate, a buckle and an anti-rotation movable part, the cover plate is rotatably installed on the first side of the anti-rotation fixed part through the rotating pin, and the anti-rotation movable part is rotatably installed on the second side of the anti-rotation fixed part through the buckle. The cover plate and the anti-rotation movable part are matched to clamp and fix the supporting rod. According to the anti-rotation device for the supporting rod, the supporting rod can be correctly clamped only by shifting the cover plate and the anti-rotation movable piece in the dismounting or mounting process of the supporting rod, the problems that a jackscrew falls off and the like are solved, and the jackscrew cannot be loosened in the subsequent normal process of a furnace tube.

Description

Technical Field

[0001] The utility model relates to the photovoltaic cell industry, in particular to a support rod anti-rotation device. Background Art

[0002] The manufacturing process for the tunneling oxide layer and polysilicon passivation layer of TopCon cells is a complex, high-temperature process. During this process, a graphite boat serves as a carrier, carrying the silicon wafers into the furnace tube for high-temperature treatment. Inside the furnace tube, a ceramic base is mounted via support rods, with the legs of the graphite boat supported on the ceramic base. The graphite boat, through contact with the ceramic base, is connected to a power source for discharge, thereby heating the boat and ensuring uniform heating of the silicon wafers within the furnace tube. During this process, ensuring the correct interface between the graphite boat legs and the ceramic base is critical for achieving efficient discharge and avoiding process failures. A small or incorrect interface will result in insufficient current flow to meet process requirements, requiring rework of the entire boat of silicon wafers. Due to environmental factors affecting the process, the support rods cannot be made of ordinary metal and cannot be directly secured with bolts. Therefore, the support rods are placed directly on the bases at each end of the furnace tube, and the ceramic base is directly mounted on the support rods. Discharge is achieved through a braided pattern and the ceramic base is prevented from rotating on the support rods. A clamp is tightened on the support rods to retain the ceramic base in place. Because the support rod cannot be fixedly installed in the furnace tube, the vibration caused by repeatedly removing and placing the graphite boat from the furnace tube and the process of placing the graphite boat on the ceramic base will cause the support rod to rotate. When the tightening part of the clamp is rotated to the side where the foot of the graphite boat contacts the ceramic base, the height of the clamp's tightening nut will be higher than the contact surface between the ceramic base and the foot of the graphite boat. At this time, when the graphite boat is placed on the ceramic base, the graphite boat will be supported by the clamp's tightening nut, causing the foot of the graphite boat and the ceramic base to not contact properly, resulting in the discharge current not meeting the process requirements. Due to the high temperature environment in the furnace tube, manual processing is impossible and can only be turned back to its original position after cooling. There is also the risk of smashing the quartz tube during the installation and removal of the support rod. In addition, this cannot fundamentally avoid the problem of the clamp facing upward.

[0003] There are two existing ways to prevent support rods from rotating. The first method is to drill a hole in the support rod and use a metal cover plate to install on the upper half of both ends of the support rod. After drilling holes at both ends of the support rod, the metal cover plate and the support rod are limited by the top screws, and then the metal cover plate is installed on the base to prevent the support rod from rotating. However, due to the material and load-bearing environment of the support rod and the stress concentration caused by the hole, the positioning hole of the support rod will be worn and enlarged during long-term use and wear, and the rotation of the support rod cannot be completely avoided. The dust generated by friction will cause pollution to the silicon wafer. In addition, when installing the support rod in the quartz tube without removing the furnace door, you can only reach into the furnace tube through the observation window, and you cannot directly observe the status of the screws. The top screw is prone to slipping during installation. In addition, due to the high temperature environment inside the furnace tube and the need for detachability, the top screw cannot use mechanical anti-loosening and thread glue, etc., and there is a risk of the top screw loosening and falling off during the furnace tube operation. The second method is to limit the rotation by changing the shape of the two ends of the support rod. Although the rotation of the support rod can be avoided after changing the shape of the support rod, other components that cooperate with the support rod will also change accordingly, which greatly increases the cost of machine modification. In addition, the support rod with the changed shape will cause inconvenience in disassembly when modifying the ceramic base. For example, the square support rod has a lower load-bearing capacity than the round one, which increases the risk of the support rod breaking in the furnace tube. During the high-frequency modification process, due to its long length, it is more likely to cause the risk of damage to the quartz tube when removing the ceramic base sleeve after removing the support rod. Utility Model Content

[0004] In order to solve the problems of loosening and falling off of the top screw in the above-mentioned prior art, the utility model provides a support rod anti-rotation device.

[0005] The utility model provides a support rod anti-rotation device, which includes an anti-rotation fixing part, a rotating pin, a cover plate, a buckle and an anti-rotation movable part, wherein the cover plate is rotatably mounted on a first side of the anti-rotation fixing part through the rotating pin, and the anti-rotation movable part is rotatably mounted on a second side of the anti-rotation fixing part through the buckle, and the cover plate and the anti-rotation movable part cooperate to clamp and fix the support rod.

[0006] In a preferred embodiment, the support rod anti-rotation device also includes an inner hole fixing member, which includes a fixing plate and a positioning pin, wherein the fixing plate is installed and fixed on the anti-rotation fixing member, and the positioning pin extends from the fixing plate toward the interior of the anti-rotation fixing member to limit the support rod.

[0007] In a preferred embodiment, the positioning pin has a clearance fit with the inner hole of the support rod under normal temperature environment, and has an interference fit with the inner hole of the support rod under high temperature environment.

[0008] In a preferred embodiment, the anti-rotation fixing member, the cover plate, the anti-rotation movable member and the inner hole fixing member are all metal members.

[0009] In a preferred embodiment, the first side of the anti-rotation fixing element has a first protruding ring protruding outward, the first side of the cover plate has an L-shaped protrusion protruding outward, and the rotation pin extends through the first protruding ring and the L-shaped protrusion.

[0010] In a preferred embodiment, the anti-rotation fixing member has two first protruding rings spaced apart from each other, and the L-shaped protrusion is located between the two first protruding rings.

[0011] In a preferred embodiment, the support rod anti-rotation device further includes a clip, which is installed at the end of the rotating pin to prevent the rotating pin from falling out.

[0012] In a preferred embodiment, the second side of the anti-rotation fixing member has a second protruding ring protruding outward, and the two buckles are rotatably mounted on the second protruding ring at opposite ends of the second protruding ring.

[0013] In a preferred embodiment, the anti-rotation movable member has a first connecting shaft and a second connecting shaft that are spaced apart from each other, and the first connecting shaft passes through two buckles and is rotatably connected.

[0014] In a preferred embodiment, the second side of the cover plate has a hook portion tilted outward, and the second connecting shaft cooperates with the hook portion to form an embracing structure to clamp the support rod.

[0015] According to the support rod anti-rotation device of the present invention, during the disassembly or installation of the support rod, it is only necessary to move the cover plate and the anti-rotation movable part to correctly complete the clamping of the support rod, avoiding problems such as the top screw falling off and the support tube will not loosen during the subsequent normal process of the furnace tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a support rod anti-rotation device according to a preferred embodiment of the present utility model.

[0017] Figure 2 yes Figure 1 Another perspective view of the support rod anti-rotation device.

[0018] Figure 3 yes Figure 2 Exploded diagram.

[0019] Figure 4 Show Figure 1 The installation environment of the support rod anti-rotation device. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will provide a clear and complete description of the technical solutions of the present invention in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0021] like Figures 1-2 As shown, according to a preferred embodiment of the present invention, the support rod anti-rotation device includes an anti-rotation fixing member 1, a rotating pin 2, a cover plate 3, a buckle 4 and an anti-rotation movable member 5, wherein the cover plate 3 is rotatably mounted on a first side of the anti-rotation fixing member 1 through the rotating pin 2, and the anti-rotation movable member 5 is rotatably mounted on a second side of the anti-rotation fixing member 1 through the buckle 4. The cover plate 3 and the anti-rotation movable member 5 cooperate to clamp and fix the support rod 10 (see Figure 4 ).

[0022] like Figure 3 As shown, the anti-rotation fixing member 1 is semi-cylindrical, and has two first protruding rings 11 spaced apart from each other on its first side. The cover plate 3 is semi-cylindrical, and has an L-shaped protrusion 31 protruding outward on its first side. Figure 2 The protrusion 31 is located between the two first protruding rings 11, and the rotating pin 2 extends through the two first protruding rings 11 and the protrusion 31 and is limited by the clip 21 to prevent the rotating pin 2 from falling out.

[0023] like Figure 3 As shown, the middle portion of the second side of the anti-rotation fixing member 1 has a second protruding ring 12 protruding outward. Two buckles 4 are rotatably mounted on the second protruding ring 12 at opposite ends via pins (not shown). The second side of the cover plate 3 has a hook portion 32 that tilts outward. The anti-rotation movable member 5 is a frame structure that includes two connecting rods 51 spaced apart from each other. The first sides of the two connecting rods 51 are connected by a first connecting shaft 52, and the second sides of the two connecting rods 51 are connected by a second connecting shaft 53. See Figure 1 The first connecting shaft 52 passes through the two buckles 4 and can be rotatably connected to limit the buckles 4. Figure 2 The second connecting shaft 53 cooperates with the hook portion 32 to form an embracing structure for the support rod 10 (see Figure 4 ) for clamping.

[0024] like Figures 1-3As shown, the support rod anti-rotation device according to this embodiment further includes an inner hole fixing member 6, which includes a fixing plate 61 and a positioning pin 62, wherein both sides of the fixing plate 61 are fixed to one end of the anti-rotation fixing member 1 by fasteners (not shown in the figure, such as screws), and the positioning pin 62 extends vertically from the middle of the fixing plate 61 toward the inside of the anti-rotation fixing member 1 to align the support rod 10 (see Figure 4 ) for limiting.

[0025] like Figure 4 As shown, a base 30 for placing the support rod 10 is fixedly mounted on the furnace door 20. The support rod anti-rotation device of the present invention is mounted on the base 30 to prevent the support rod 10 from rotating. Specifically, the anti-rotation fixing member 1 is mounted on the base 30 from below, the cover plate 3 surrounds the rotation pin 2 and embraces the support rod 10, the anti-rotation movable member 5 is fastened to the cover plate 3, and the buckle 4 is fastened to the outer surface of the anti-rotation fixing member 1 to complete the installation.

[0026] It should be understood that the cover plate 3 and the anti-rotation movable member 5 are each free to rotate within a certain range of angles. When the cover plate 3 needs to be opened, the angle between the cover plate 3 and the horizontal plane of the support rod anti-rotation device is less than 90 degrees, so that the cover plate 3 is downwardly tilted under its own weight and does not fall back onto the support rod 10 after opening.

[0027] The support rod 10 has two opposite ends. When in use, first install the end of the support rod 10 without the positioning pin, and then install the other end, so that the positioning pin 62 of the inner hole fixing part 6 of the support rod anti-rotation device of the present invention is inserted into the inner hole of the support rod 10 for positioning, close the cover plate 3, close the anti-rotation movable part 5 and the buckle 4, and the anti-rotation fixation of the support rod 10 is completed.

[0028] In this embodiment, the anti-rotation fixing member 1 , the cover plate 3 , the anti-rotation movable member 5 and the inner hole fixing member 6 are all metal parts.

[0029] In particular, at room temperature, the positioning pin 62 that enters the inner hole of the support rod 10 forms a clearance fit with the inner hole of the support rod 10, which plays an explosion-proof role when the fire-fighting rotation fixing member 1, the cover plate 3 and the anti-rotation movable member 5 apply excessive force to the support rod 10. After the furnace tube is heated to a high temperature, due to the thermal expansion and contraction characteristics of metal materials, the clamping force of the anti-rotation fixing member 1, the cover plate 3 and the anti-rotation movable member 5 on the support rod 10 may decrease. At this time, the positioning pin 62 in the inner hole of the support rod 10 expands due to the heat to form an interference fit, and the support rod 10 is fixed from the inside to offset the clamping force of the anti-rotation fixing member 1, the cover plate 3 and the anti-rotation movable member 5 that decreases due to heat.

[0030] Thus, according to the support rod anti-rotation device of the present invention, when installing or removing the support rod 10 through the observation window 40, only the cover plate 3 and the anti-rotation movable member 5 need to be moved to quickly, effectively, and correctly install and clamp the support rod 10. This is particularly suitable for the high-temperature and confined environment inside the furnace tube. Moreover, according to the support rod anti-rotation device of the present invention, the clearance / interference fit and the thermal expansion and contraction properties of the material can be utilized to ensure that the support rod 10 will not loosen during operation due to the high temperature environment inside the furnace tube. The support rod 10 can always be effectively clamped without the need for additional changes to the components related to the support rod 10.

[0031] In short, according to the support rod anti-rotation device of the present invention, the support rod can be correctly fixed without changing the support rod and its related parts, and there is no need to use top screws, etc. It mainly uses the mechanical properties of the material for clamping and anti-loosening, avoiding the loosening of screws caused by vibration during the normal operation of the furnace tube, which leads to the rotation of the support rod, etc. There is no need to change the original support rod, that is, it does not affect the existing parts, and the cost is low. During the disassembly or installation of the support rod, it is only necessary to move the cover plate and the anti-rotation movable part to correctly complete the clamping of the support rod and it will not loosen during the subsequent normal process of the furnace tube.

[0032] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims of the present invention.

Claims

1. A support rod anti-rotation device, characterized in that: The support rod anti-rotation device includes an anti-rotation fixing part, a rotating pin, a cover plate, a buckle and an anti-rotation movable part, wherein the cover plate is rotatably mounted on the first side of the anti-rotation fixing part through the rotating pin, and the anti-rotation movable part is rotatably mounted on the second side of the anti-rotation fixing part through the buckle, and the cover plate and the anti-rotation movable part cooperate to clamp and fix the support rod.

2. The support rod anti-rotation device according to claim 1, characterized in that: The support rod anti-rotation device also includes an inner hole fixing piece, which includes a fixing plate and a positioning pin, wherein the fixing plate is installed and fixed on the anti-rotation fixing piece, and the positioning pin extends from the fixing plate toward the inside of the anti-rotation fixing piece to limit the support rod.

3. The support rod anti-rotation device according to claim 2, characterized in that: The locating pin has a clearance fit with the inner hole of the support rod under normal temperature environment, and has an interference fit with the inner hole of the support rod under high temperature environment.

4. The support rod anti-rotation device according to claim 2, characterized in that: The anti-rotation fixing part, the cover plate, the anti-rotation movable part and the inner hole fixing part are all metal parts.

5. The support rod anti-rotation device according to claim 1, characterized in that: The first side of the anti-rotation fixing element has a first protruding ring protruding outward, the first side of the cover plate has an L-shaped protrusion protruding outward, and the rotation pin extends through the first protruding ring and the L-shaped protrusion.

6. The support rod anti-rotation device according to claim 5, characterized in that: The anti-rotation fixing component has two first convex rings spaced apart from each other, and the L-shaped protrusion is located between the two first convex rings.

7. The support rod anti-rotation device according to claim 5, characterized in that: The support rod anti-rotation device also includes a clip, which is installed at the end of the rotating pin to prevent the rotating pin from falling out.

8. The support rod anti-rotation device according to claim 1, characterized in that: The second side of the anti-rotation fixing piece is provided with a second convex ring protruding outward, and the two buckles are rotatably mounted on the second convex ring at opposite ends of the second convex ring.

9. The support rod anti-rotation device according to claim 8, characterized in that: The anti-rotation movable part comprises a first connecting shaft and a second connecting shaft which are spaced apart from each other, and the first connecting shaft passes through two buckles and is rotatably connected.

10. The support rod anti-rotation device according to claim 9, characterized in that: The second side of the cover plate has a hook portion tilted outward, and the second connecting shaft cooperates with the hook portion to form an embracing structure to clamp the support rod.

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