A dinghy end plate with stress release unit and dinghy

Abstract

This invention relates to a boat end plate with stress relief units and a boat. The boat end plate is a plate-like structure, and at least one stress relief unit is formed on the surface of the plate. The stress relief unit is a groove or a hole. The edge contour of the stress relief unit is a straight line or a smooth curve. Furthermore, the opening of the groove or hole has a chamfer or rounded corner in the thickness direction of the plate-like structure. The boat end plate of this invention absorbs and disperses thermal stress and prevents crack propagation by incorporating stress relief units. The boat end plate of this invention has advantages such as good stress relief effect, long service life, light weight, and uniform temperature distribution, and is suitable for silicon carbide boats used in photovoltaic diffusion furnaces.

Description

Technical Field

[0001] This invention belongs to the field of photovoltaic technology, specifically relating to a boat end plate and a boat with a stress relief unit. Background Technology

[0002] Silicon carbide boats are key load-bearing components in photovoltaic diffusion furnaces. Their end plates, as the main supporting structure, must withstand repeated high-temperature shocks and mechanical loads. Existing boat end plates are mostly flat plate structures, which often experience problems such as thermal stress concentration leading to cracking, uncontrollable crack propagation, and localized stress superposition during long-term use. Under rapid heating and cooling cycles, a temperature difference exists between the center and edges of the end plate, causing thermal stress concentration. Due to the lack of stress relief design, when the thermal stress exceeds the material's strength limit, cracks easily develop in the end plate from the center or corners and propagate rapidly, ultimately leading to end plate fracture and scrapping. Moreover, once cracks initiate, traditional flat plate structures cannot prevent crack propagation; the cracks extend rapidly in a straight line, causing overall structural failure. Furthermore, geometric abrupt changes exist at the connection points between the end plate and the columns, and around mounting holes, easily forming stress concentration points and further exacerbating the risk of cracking. Summary of the Invention

[0003] In response to the current technical challenges faced by the industry, this invention develops a boat end plate and a boat with a stress relief unit to solve the problem of end plate cracking caused by the concentration and inability to release thermal stress in existing technologies.

[0004] A boat end plate with stress relief units is disclosed. The boat end plate is a plate-like structure, and at least one stress relief unit is formed on the surface of the plate-like structure. The stress relief unit is a groove or a hole. The edge contour of the stress relief unit is a straight line or a smooth curve. The opening of the groove or hole has a chamfer or rounded corner in the thickness direction of the plate-like structure. The edge contour of the stress relief unit is a straight line or a smooth curve to avoid the generation of new stress concentration points.

[0005] Furthermore, the stress relief unit is a stress relief unit that extends through the thickness of the plate-like structure.

[0006] Furthermore, the stress relief unit is a stress relief unit that does not penetrate the thickness of the plate structure.

[0007] Furthermore, the stress relief unit is disposed at the geometric center of the plate-like structure or symmetrically distributed along the geometric center.

[0008] Furthermore, the stress relief unit is a circular hole with a diameter ranging from 3 to 40 mm.

[0009] Furthermore, the stress relief unit is a long strip groove with a length range of 40~80mm and a width range of 3~40mm, and the long axis of the long strip groove is consistent with the length direction of the boat end plate.

[0010] Furthermore, the stress relief unit is a waist-shaped groove, and the length of the waist-shaped groove ranges from 50 to 100 mm, the width ranges from 3 to 40 mm, and the long axis of the waist-shaped groove is consistent with the length direction of the boat end plate.

[0011] Furthermore, the stress relief unit is a square groove, and the side length of the square groove is 50~70mm.

[0012] Furthermore, the stress relief unit is a hollow cylinder protruding from the plate-like structure, with an outer diameter of 3-40 mm, a wall thickness of 1-10 mm, and a length of 10-80 mm. The hollow cylinder can serve as a handle.

[0013] Furthermore, when there are multiple stress relief units, they are arranged in an array.

[0014] Furthermore, the thickness of the end plate of the small boat ranges from 3mm to 10mm.

[0015] Furthermore, the opening of the groove or hole is provided with a rounded corner in the thickness direction of the plate-like structure, and the rounded corner radius R≥1mm.

[0016] A small boat, the small boat comprising a pair of boat end plates as described above, and a plurality of support columns disposed between the two boat end plates.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: Firstly, the boat end plate of this invention, by incorporating stress relief units, provides deformation space during thermal expansion, allowing the material to freely expand and contract, thereby absorbing and dispersing thermal stress and reducing stress peaks. Secondly, when a crack propagates to the stress relief unit, the slots or holes disrupt the continuous crack propagation path, forcing the crack to terminate or change direction, thus acting as a crack arrestor. Furthermore, the slots or holes reduce the material usage of the boat end plate, resulting in a lighter overall weight, which helps reduce heat capacity and the load on the robotic arm. Moreover, the hollowed-out areas facilitate heat flow, making the temperature distribution of the boat end plate more uniform during heating and cooling, reducing thermal stress caused by temperature differences. The boat end plate of this invention has advantages such as good stress relief effect, long service life, light weight, and uniform temperature distribution, making it suitable for silicon carbide boats used in photovoltaic diffusion furnaces. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the end plate of the small boat described in Embodiment 1 of the present invention.

[0019] Figure 2 This is a schematic diagram of the end plate of the small boat described in Embodiment 2 of the present invention.

[0020] Figure 3 This is a schematic diagram of the end plate of the small boat described in Embodiment 3 of the present invention. Detailed Implementation

[0021] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments are now described in detail with reference to the accompanying drawings. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Where specific conditions are not specified in the detailed embodiments, conventional conditions or conditions provided by the manufacturer shall apply.

[0022] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. Specific Implementation Method 1

[0023] A boat end plate with stress relief units, wherein the boat end plate is a plate-shaped structure, and at least one stress relief unit is provided on the plate surface of the plate-shaped structure. The stress relief unit is a groove or a hole. The edge contour of the stress relief unit is a straight line or a smooth curve. The opening of the groove or hole is chamfered or rounded in the thickness direction of the plate-shaped structure. Specific Implementation Method Two

[0024] A small boat includes a pair of boat end plates as described in Specific Embodiment 1, and a plurality of support columns disposed between the two boat end plates.

[0025] The present invention will be further described in detail below with reference to specific embodiments. Example 1

[0026] A small boat end plate with stress relief units, such as Figure 1 As shown, the end plate of the small boat is a plate-shaped structure, and at least one stress relief unit is provided on the plate surface. The stress relief unit is a groove or a hole. The edge contour of the stress relief unit is a straight line or a smooth curve. The opening of the groove or hole has a chamfer or rounded corner in the thickness direction of the plate-shaped structure.

[0027] In this embodiment 1, the end plate of the small boat is a plate-like structure made of silicon carbide. The stress relief unit includes four circular holes penetrating the thickness of the plate-like structure and two hollow cylinders protruding from the plate-like structure. The diameters of the circular holes and hollow cylinders are all in the range of 3-40 mm, the wall thickness of the hollow cylinders is 1-10 mm, and the length is 10-80 mm. In this embodiment 1, the circular holes and hollow cylinders are symmetrically distributed in an array along the geometric center of the plate-like structure. Crack-arresting ribs are formed between adjacent stress relief units. Example 2

[0028] The only difference between this embodiment 2 and embodiment 1 is that the stress relief unit includes two hollow cylinders protruding from the plate-like structure and a waist-shaped groove penetrating the plate-like structure. The length of the waist-shaped groove ranges from 50 to 100 mm, and the width ranges from 3 to 40 mm. Example 3

[0029] The difference between Embodiment 3 and Embodiment 1 is that the stress relief unit includes two hollow cylinders protruding from the plate-like structure and two elongated grooves penetrating the plate-like structure. The length of the elongated grooves ranges from 50 to 100 mm, the width ranges from 3 to 40 mm, and the long axis of the elongated grooves is consistent with the length direction of the boat end plate.

[0030] Comparative Example 1: The only difference between Comparative Example 1 and Example 1 is that: no stress relief unit is provided on the plate structure, and the plate structure includes two solid cylinders protruding from the plate structure as handles.

[0031] The results showed that the small boat end plate in Comparative Example 1 developed a central crack and fractured after several cycles, while the small boat end plates in Examples 1-3 did not show obvious through cracks after long-term cycling, and their service life was significantly improved.

[0032] This invention has been described through the specific embodiments described above. Those skilled in the art should understand that various modifications and equivalent substitutions can be made to this invention without departing from its scope. Parts not described in detail in this specification are well-known to those skilled in the art. Furthermore, various modifications can be made to this invention for specific situations or circumstances without departing from its scope. Therefore, this invention is not limited to the specific embodiments disclosed, but should include all embodiments falling within the scope of the claims.

Claims

1. A boat end plate with a stress relief unit, characterized in that, The end plate of the small boat is a plate-shaped structure, and at least one stress relief unit is provided on the plate surface. The stress relief unit is a groove or a hole. The edge contour of the stress relief unit is a straight line or a smooth curve. The opening of the groove or hole has a chamfer or rounded corner in the thickness direction of the plate-shaped structure.

2. The boat end plate according to claim 1, characterized in that, The stress relief unit is a stress relief unit that extends through the thickness of the plate structure.

3. The boat end plate according to claim 1, characterized in that, The stress relief unit is a stress relief unit that does not penetrate the thickness of the plate structure.

4. The boat end plate according to claim 1, characterized in that, The stress relief units are located at the geometric center of the plate-like structure or are symmetrically distributed along the geometric center.

5. The boat end plate according to any one of claims 1 to 5, characterized in that, The stress relief unit is a circular hole with a diameter ranging from 3 to 40 mm.

6. The boat end plate according to any one of claims 1 to 5, characterized in that, The stress relief unit is a long strip groove with a length range of 40-80mm and a width range of 3-40mm, and the long axis of the long strip groove is consistent with the length direction of the boat end plate.

7. The boat end plate according to any one of claims 1 to 5, characterized in that, The stress relief unit is a waist-shaped groove, and the length of the waist-shaped groove ranges from 50 to 100 mm, the width ranges from 3 to 40 mm, and the long axis of the waist-shaped groove is consistent with the length direction of the boat end plate.

8. The boat end plate according to claim 1, characterized in that, The stress relief unit is a hollow cylinder protruding from the plate-like structure. The outer diameter of the hollow cylinder is 3~40mm, the wall thickness is 1~10mm, and the length is 10~80mm.

9. The boat end plate according to claim 1, characterized in that, The thickness of the end plate of the small boat ranges from 3mm to 10mm.

10. The small boat according to claim 1, characterized in that, The invention includes a pair of small boat end plates as described in any one of claims 1 to 9, and a plurality of support columns disposed between the two small boat end plates.

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