A protective cover for conveyor rollers

Abstract

A protective cover for a conveyor roller includes a multi-layer three-dimensional frame structure and a protective layer covering the multi-layer three-dimensional frame structure. The multi-layer three-dimensional frame structure is detachably mounted above the conveyor roller. When the conveyor roller is running, the protective cover effectively blocks dripping water from the factory ceiling, prevents dust from falling into the roller and glass surface, and reduces heat loss in the roller area. For maintenance, the protective layer can be quickly removed or the entire protective cover can be lifted to expose the roller for operation. For glass products of different thicknesses, the height of the support columns and base can be adjusted to adapt the protective cover to different process space requirements. This invention, through a detachable multi-layer three-dimensional frame structure combined with a replaceable protective layer and an adjustable base height, achieves integrated waterproof, dustproof, and heat-insulating protection for the conveyor roller. It has the advantages of strong adaptability, convenient assembly and disassembly, adjustable height, diverse functions, and no need to modify the production line.

Description

Technical Field

[0001] This invention belongs to the technical field of photovoltaic glass production conveying equipment, and specifically relates to a protective cover for conveying rollers. Background Technology

[0002] Currently, the conveyor lines used in the domestic photovoltaic glass tempering production process are typically quite long. As factory buildings age, some older buildings experience roof dripping, and there are also issues with excessive dust levels inside the workshops. Furthermore, extremely low winter temperatures in some parts of China place even higher demands on the stability of the production environment.

[0003] Defects and shortcomings of existing technology: In existing technologies, photovoltaic glass conveyor rollers are typically directly exposed to the workshop environment, lacking effective protective measures. This leads to: 1. When water droplets condense on the factory ceiling, they will drip directly onto the high-temperature glass or roller conveyor, which may cause the glass to crack or create stress spots, seriously affecting product quality.

[0004] 2. Dust in the workshop can easily adhere to the roller conveyor and glass surface, causing scratches or contamination on the glass surface and reducing product yield.

[0005] 3. In low-temperature environments, exposed rollers and glass dissipate heat too quickly, making it difficult to maintain a stable process temperature, increasing the difficulty of temperature control and energy consumption, and affecting production stability.

[0006] Chinese utility model patent with publication number CN218967166U discloses a protective device for glass conveyor rollers. The device achieves shielding by setting fixed supports on both sides of the rollers and laying protective plates on top of the supports. However, the protective plates are fixed rigid structures with no height adjustment, which can only protect glass of a single size. Moreover, the whole device is welded and fixed, making it inconvenient to disassemble and assemble, and unable to quickly adapt to different process requirements. At the same time, the device only has basic dustproof function and lacks targeted waterproof and heat insulation structures, so it cannot solve the problems of water dripping and low temperature heat dissipation in the factory.

[0007] Chinese utility model patent with publication number CN212025470U discloses a dust cover for conveyor rollers. The dust cover adopts a structure in which the cover body is fastened to the top of the roller to achieve a basic dust protection effect. However, the cover body and the roller frame are fixedly connected, there is no height adjustment mechanism, and the cover body material does not have heat insulation properties, so it cannot block water dripping or maintain the process temperature of the roller. At the same time, the overall structure cannot be quickly disassembled, which is not conducive to the daily inspection and maintenance of the roller. Summary of the Invention

[0008] In order to overcome the shortcomings of the prior art, the present invention aims to provide a protective cover for conveyor rollers. Through a detachable multi-layer three-dimensional frame structure combined with a replaceable protective layer and an innovative structure with an adjustable base height, it can achieve integrated protection of the conveyor rollers by being waterproof, dustproof, and heat-insulating. It has the technical advantages of strong adaptability, convenient disassembly and assembly, adjustable height, multiple functions, and no modification to the production line.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A protective cover for a conveyor roller includes a multi-layer three-dimensional frame structure and a protective layer covering the multi-layer three-dimensional frame structure. The multi-layer three-dimensional frame structure is detachably mounted above the conveyor roller. The multi-layer three-dimensional frame structure includes: a base frame assembly 1, a top frame assembly 2 connected above the base frame assembly 1, a support column assembly 3 connected between the base frame assembly 1 and the top frame assembly 2, the support column assembly 3 extending vertically downward to below the top frame assembly 2, and its bottom being connected to the base assembly 4. The base frame assembly 1, the top frame assembly 2 and the support column assembly 3 are all connected at spatial nodes by connecting node parts 5.

[0010] The base frame assembly 1 includes a first bottom longitudinal beam 101 and a second bottom longitudinal beam 102 arranged parallel to each other, and a first bottom cross beam 1031 and a second bottom cross beam 1032 respectively connected between the two ends of the first bottom longitudinal beam 101 and the second bottom longitudinal beam 102. The top frame assembly 2 is suspended above the base frame assembly 1 and corresponds to the shape of the base frame assembly 1. The top frame assembly 2 includes a first top longitudinal beam 201, a second top longitudinal beam 202, and a first top cross beam 2031 and a second top cross beam 2032 respectively connected between the two ends of the first top longitudinal beam 201 and the second top longitudinal beam 202. The support column assembly 3 includes 4 vertically arranged support columns. Each support column is vertically connected between the corners of the base frame assembly 1 and the top frame assembly 2, and extends to the bottom of the top frame assembly 2. Its bottom is connected to the base assembly 4 to enclose the side space of the conveyor roller conveyor. The base assembly 4 includes 4 bases and 4 vertical square tubes connected to their top surfaces. The 4 vertical square tubes are respectively connected to 4 supporting columns. The 4 bases are fixed on the frames on both sides of the conveyor roller conveyor. The connecting node 5 is located at the intersection of the base frame assembly 1, the top frame assembly 2 and the support column assembly 3, and is used to realize the detachable or fixed connection between the components.

[0011] The four vertically arranged support columns of the support column assembly 3 include a first support column 301, a second support column 302, a third support column 303, and a fourth support column 304. The base assembly 4 has four vertical square tubes, including a first vertical square tube 401 that is vertically connected to the first support column 301, a second vertical square tube 402 that is vertically connected to the second support column 302, a third vertical square tube 403 that is vertically connected to the third support column 303, and a fourth vertical square tube 404 that is vertically connected to the fourth support column 304.

[0012] The first bottom longitudinal beam 101, the second bottom longitudinal beam 102, the first bottom transverse beam 1031, the second bottom transverse beam 1032, the first top longitudinal beam 201, the second top longitudinal beam 202, the first top transverse beam 2031, the second top transverse beam 2032, the first support column 301, the second support column 302, the third support column 303, and the fourth support column 304 are all square tube structures.

[0013] The connecting node 5 includes a first corner node 501, a second corner node 502, a third corner node 503, and a fourth corner node 504 located at the four corners of the base frame assembly 1; The fifth corner node 505, the sixth corner node 506, the seventh corner node 507 located at the four corners of the top frame assembly 2, and the eighth corner node 508 located at the four corners of the top frame assembly 2.

[0014] The first corner node 501, the second corner node 502, the third corner node 503, the fourth corner node 504, the fifth corner node 505, the sixth corner node 506, the seventh corner node 507, and the eighth corner node 508 are three-dimensional four-way connectors.

[0015] The main socket of the first corner node 501 is connected to the front end of the first bottom longitudinal beam 101 and the inner end of the first bottom transverse beam 1031 respectively. The first support column 301 passes through the cavity of the first corner node 501 and is connected to the first vertical square tube 401. The main socket of the second corner node 502 is connected to the front end of the second bottom longitudinal beam 102 and the outer end of the first bottom transverse beam 1031 respectively. The second support column 302 passes through the cavity of the second corner node 502 and is connected to the second vertical square tube 402. The main socket of the third corner node 503 is connected to the rear end of the first bottom longitudinal beam 101 and the inner end of the second bottom transverse beam 1032 respectively. The third support column 303 penetrates the cavity of the third corner node 503 and is connected to the third vertical square tube 403. The main socket of the fourth corner node 504 is connected to the rear end of the second bottom longitudinal beam 102 and the outer end of the second bottom transverse beam 1032 respectively. The fourth support column 304 penetrates the cavity of the fourth corner node 504 and is connected to the fourth vertical square tube 404. The main socket of the fifth corner node 505 is connected to the front end of the first top longitudinal beam 201, the inner end of the first top transverse beam 2031, and the top of the first support column 301, respectively. The main socket of the sixth corner node 506 is connected to the front end of the second top longitudinal beam 202, the outer end of the first top transverse beam 2031, and the top of the second support column 302, respectively. The main socket of the seventh corner node 507 is connected to the rear end of the first top longitudinal beam 201, the inner end of the second top transverse beam 2032, and the top of the third support column 303, respectively. The main socket of the eighth corner node 508 is connected to the rear end of the second top longitudinal beam 202, the outer end of the second top transverse beam 2032, and the top of the fourth support column 304.

[0016] A height adjustment structure is provided between the base assembly 4 and the support column assembly 3.

[0017] The height adjustment structure includes multiple positioning holes axially opened at the lower part of the first support column 301, the second support column 302, the third support column 303, and the fourth support column 304. The first vertical square tube 401, the second vertical square tube 402, the third vertical square tube 403, and the fourth vertical square tube 404 of the base assembly 4 are respectively provided with connecting holes axially. The positioning holes of different heights are selected for bolt fixing connection to adjust the overall height of the multi-layer three-dimensional frame structure.

[0018] The protective layer is made of transparent or opaque flexible or rigid materials.

[0019] Compared with the prior art, the present invention has the following technical effects: 1. Effective protection and improved yield: The invention, through its multi-layer three-dimensional frame structure and protective layer, can effectively block dripping water from the factory roof and prevent dust from falling directly onto the glass surface. At the same time, it forms a relatively sealed insulated space, significantly reducing the interference of the external environment on the production process.

[0020] 2. Simple structure and easy installation: The base frame assembly 1, top frame assembly 2, and support column assembly 3 of this invention are fixedly connected at spatial nodes through connecting node parts 5 to form an orthogonal grid-like top and side support structure. The whole assembly is directly mounted on the existing roller conveyor frame through the base, without the need for large-scale modification of the production line.

[0021] 3. Flexible adjustment and strong adaptability: The support column assembly 3 is vertically connected between the base frame and the top frame, and is connected to the base assembly 4 below, which can easily change the height of the protective cover to adapt to different specifications of glass or different process requirements.

[0022] 4. Higher spatial stiffness: The present invention achieves rigid constraints in the X, Y and Z directions through the four-way connector structure of the connecting node 5, and its wind resistance and vibration resistance performance are better than ordinary three-way nodes.

[0023] 5. High modularity and expandability: This invention can add columns and beams (multi-layer three-dimensional frame structure) and four-way units (four-way connectors) in any direction, easily adapting to conveyor rollers of different lengths and widths.

[0024] 6. Detachable and flexible: The overall structure of this invention adopts a detachable connection, which facilitates the inspection or maintenance of the roller conveyor. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of the multi-layer three-dimensional frame structure of the present invention.

[0026] Figure 2 This is a front view of the present invention, showing the layered structure and height relationship of the multi-layered three-dimensional frame structure in the vertical plane.

[0027] Figure 3 This is a left view of the present invention, showing the layered structure and width direction layout of the multi-layer three-dimensional frame structure in the lateral vertical plane.

[0028] Figure 4 This is an enlarged view of the base assembly 4 of the present invention, showing the layered structure and width direction layout of the support frame in the lateral vertical plane.

[0029] In the diagram: 1. Base frame assembly; 101. First bottom longitudinal beam; 102. Second bottom longitudinal beam; 1031. First bottom transverse beam; 1032. Second bottom transverse beam; 2. Top frame assembly; 201. First top longitudinal beam; 202. Second top longitudinal beam; 2031. First top transverse beam; 2032. Second top transverse beam; 3. Support column assembly; 301. First support column; 302. Second support column; 303. Third support column; 304. 4. Base assembly; 401. First vertical square tube; 402. Second vertical square tube; 403. Third vertical square tube; 404. Fourth vertical square tube; 5. Connecting node; 501. First corner node; 502. Second corner node; 503. Third corner node; 504. Fourth corner node; 505. Fifth corner node; 506. Sixth corner node; 507. Seventh corner node; 508. Eighth corner node. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] like Figure 1As shown, a protective cover for a conveyor roller includes a multi-layer three-dimensional frame structure and a protective layer covering the multi-layer three-dimensional frame structure. The multi-layer three-dimensional frame structure is detachably mounted above the conveyor roller. The multi-layer three-dimensional frame structure includes: a base frame assembly 1, a top frame assembly 2 connected above the base frame assembly 1, a support column assembly 3 connected between the base frame assembly 1 and the top frame assembly 2, the support column assembly 3 extending vertically downward to below the top frame assembly 2, and its bottom being connected to the base assembly 4. The base frame assembly 1, the top frame assembly 2 and the support column assembly 3 are all connected at spatial nodes by connecting node parts 5.

[0032] The base frame assembly 1 includes a first bottom longitudinal beam 101 and a second bottom longitudinal beam 102 arranged parallel to each other, and a first bottom cross beam 1031 and a second bottom cross beam 1032 respectively connected between the two ends of the first bottom longitudinal beam 101 and the second bottom longitudinal beam 102. The top frame assembly 2 is suspended above the base frame assembly 1 and corresponds to the shape of the base frame assembly 1. The top frame assembly 2 includes a first top longitudinal beam 201, a second top longitudinal beam 202, and a first top cross beam 2031 and a second top cross beam 2032 respectively connected between the two ends of the first top longitudinal beam 201 and the second top longitudinal beam 202. The support column assembly 3 includes 4 vertically arranged support columns. Each support column is vertically connected between the corners of the base frame assembly 1 and the top frame assembly 2, and extends to the bottom of the top frame assembly 2. Its bottom is connected to the base assembly 4 to enclose the side space of the conveyor roller conveyor. The base assembly 4 includes 4 bases and 4 vertical square tubes connected to the top surface thereon. The 4 vertical square tubes are respectively connected to 4 supporting columns one by one. The 4 bases are fixed on the frame on both sides of the conveyor roller conveyor to support the entire protective cover structure. The connecting node 5 is located at the intersection of the base frame assembly 1, the top frame assembly 2 and the support column assembly 3, and is used to realize the detachable or fixed connection between the components.

[0033] The four vertically arranged support columns of the support column assembly 3 include a first support column 301, a second support column 302, a third support column 303, and a fourth support column 304. The base assembly 4 has four vertical square tubes, including a first vertical square tube 401 that is vertically connected to the first support column 301, a second vertical square tube 402 that is vertically connected to the second support column 302, a third vertical square tube 403 that is vertically connected to the third support column 303, and a fourth vertical square tube 404 that is vertically connected to the fourth support column 304.

[0034] The first bottom longitudinal beam 101, the second bottom longitudinal beam 102, the first bottom transverse beam 1031, the second bottom transverse beam 1032, the first top longitudinal beam 201, the second top longitudinal beam 202, the first top transverse beam 2031, the second top transverse beam 2032, the first support column 301, the second support column 302, the third support column 303, and the fourth support column 304 are all square tube structures.

[0035] The connecting node 5 includes a first corner node 501, a second corner node 502, a third corner node 503, and a fourth corner node 504 located at the four corners of the base frame assembly 1; The fifth corner node 505, the sixth corner node 506, the seventh corner node 507 located at the four corners of the top frame assembly 2, and the eighth corner node 508 located at the four corners of the top frame assembly 2.

[0036] The first corner node 501, the second corner node 502, the third corner node 503, the fourth corner node 504, the fifth corner node 505, the sixth corner node 506, the seventh corner node 507, and the eighth corner node 508 are three-dimensional four-way connectors.

[0037] The main socket of the first corner node 501 is connected to the front end of the first bottom longitudinal beam 101 and the inner end of the first bottom transverse beam 1031 respectively. The first support column 301 passes through the cavity of the first corner node 501 and is connected to the first vertical square tube 401. The main socket of the second corner node 502 is connected to the front end of the second bottom longitudinal beam 102 and the outer end of the first bottom transverse beam 1031 respectively. The second support column 302 passes through the cavity of the second corner node 502 and is connected to the second vertical square tube 402. The main socket of the third corner node 503 is connected to the rear end of the first bottom longitudinal beam 101 and the inner end of the second bottom transverse beam 1032 respectively. The third support column 303 penetrates the cavity of the third corner node 503 and is connected to the third vertical square tube 403. The main socket of the fourth corner node 504 is connected to the rear end of the second bottom longitudinal beam 102 and the outer end of the second bottom transverse beam 1032 respectively. The fourth support column 304 penetrates the cavity of the fourth corner node 504 and is connected to the fourth vertical square tube 404. The main socket of the fifth corner node 505 is connected to the front end of the first top longitudinal beam 201, the inner end of the first top transverse beam 2031, and the top of the first support column 301, respectively. The main socket of the sixth corner node 506 is connected to the front end of the second top longitudinal beam 202, the outer end of the first top transverse beam 2031, and the top of the second support column 302, respectively. The main socket of the seventh corner node 507 is connected to the rear end of the first top longitudinal beam 201, the inner end of the second top transverse beam 2032, and the top of the third support column 303, respectively. The main socket of the eighth corner node 508 is connected to the rear end of the second top longitudinal beam 202, the outer end of the second top transverse beam 2032, and the top of the fourth support column 304.

[0038] A height adjustment structure is provided between the base assembly 4 and the support column assembly 3, which can change the vertical distance between the top of the protective cover and the roller surface.

[0039] The height adjustment structure includes multiple positioning holes axially opened at the lower part of the first support column 301, the second support column 302, the third support column 303, and the fourth support column 304. The first vertical square tube 401, the second vertical square tube 402, the third vertical square tube 403, and the fourth vertical square tube 404 of the base assembly 4 are respectively provided with connecting holes axially. The positioning holes of different heights are selected for bolt fixing connection to adjust the overall height of the multi-layer three-dimensional frame structure.

[0040] The protective layer is made of transparent or opaque flexible or rigid materials to achieve waterproof, dustproof and heat insulation functions.

[0041] like Figure 1 As shown, this invention employs a multi-layered three-dimensional frame structure, including a base frame assembly 1, a top frame assembly 2, and supporting column assemblies 3. The components are fixedly connected at spatial nodes via connecting nodes 5, forming an orthogonal grid-like top and side support structure. The base frame assembly 1 and top frame assembly 2 are respectively formed by longitudinal beams and transverse beams perpendicularly intersecting each other. The supporting column assembly 3 is vertically connected between the base frame and the top frame, with its lower end connected to the base assembly 4. A protective layer covers the top and sides of the frame, providing waterproofing, dustproofing, and heat insulation. Specifically: The multi-layered three-dimensional frame structure is generally in the shape of a cuboid frame. The base frame assembly 1 consists of a first bottom longitudinal beam 101, a second bottom longitudinal beam 102, a first bottom transverse beam 1031, and a second bottom transverse beam 1032 forming a rectangular base frame. The top frame assembly 2 consists of a first top longitudinal beam 201, a second top longitudinal beam 202, a first top transverse beam 2031, and a second top transverse beam 2032 forming a rectangular top frame, suspended above the base frame assembly 1. The support column assembly 3 includes a first support column 301, a second support column 302, a third support column 303, and a fourth support column 304. These four support columns are vertically connected between the base frame assembly 1 and the top frame assembly 2, and extend below the top frame assembly 2 to connect with the first vertical square tube 401, the second vertical square tube 402, the third vertical square tube 403, and the fourth vertical square tube 404 of the base assembly 4, respectively.

[0042] like Figure 2 As shown, viewed from the front, the multi-layered three-dimensional frame structure exhibits a clear vertical layered layout: The diagram clearly shows the overall height H of the protective cover, as well as the spacing h1 and h2 between each layer. These spacings can be changed through the height adjustment structure between the support column assembly 3 and the base assembly 4. In the front view, the top frame assembly 2 appears as a horizontally arranged top beam, forming the top support of the protective cover.

[0043] In the front view, the top frame assembly 2 is represented by a horizontally arranged top beam, which forms the top support of the protective cover.

[0044] Left view structure (see) Figure 3 ): like Figure 3 As shown, when viewed from the left side, the multi-layered three-dimensional frame structure exhibits the following characteristics: In the left-hand view, multiple vertical columns (i.e., the third support column 303 and the fourth support column 304 in support column assembly 3) are visible, arranged at equal or unequal intervals along the conveying direction (longitudinal). The bottom of each vertical support column is fixed to the base assembly 4, and the top of each vertical support column is connected to the transversely arranged crossbeams through connecting nodes (seventh corner node 507 and eighth corner node 508). In the left-hand view, the third support column 303 and the fourth support column 304 in support column assembly 3 appear as longitudinally extending top beams, forming a complete top support system.

[0045] like Figure 4 As shown in the enlarged view of the base assembly 5, the connection structure between the base and the support column is illustrated. Multiple positioning holes are provided axially at the lower part of the support column, and corresponding connection holes are provided on the base. By selecting positioning holes of different heights for bolt fixing, the overall height of the multi-layer three-dimensional frame structure can be adjusted, thereby changing the vertical distance between the protective cover and the surface of the conveyor roller.

[0046] The protective layer is covered in the following ways: The protective layer covers the top and sides of the entire multi-layer three-dimensional frame structure. It can be made of transparent plexiglass or rainproof cloth and is fixed to the outside of the frame by screws, buckles or binding to achieve waterproof, dustproof and heat insulation functions.

[0047] The working principle of this invention is as follows: When the conveyor rollers are in operation, the protective cover covering them effectively blocks dripping water from the factory ceiling, prevents dust from falling onto the rollers and glass surfaces, and reduces heat loss in the roller area. For maintenance, the protective layer can be quickly removed or the entire cover can be lifted away to expose the rollers for operation. For glass products of different thicknesses, the height of the support columns and base can be adjusted to adapt the protective cover to different process space requirements.

Claims

1. A protective cover for a conveyor roller, characterized in that, It includes a multi-layer three-dimensional frame structure and a protective layer covering the multi-layer three-dimensional frame structure, which is detachably mounted above the conveyor roller conveyor. The multi-layer three-dimensional frame structure includes: a base frame assembly (1), a top frame assembly (2) connected above the base frame assembly (1), a support column assembly (3) connected between the base frame assembly (1) and the top frame assembly (2), the support column assembly (3) extending vertically downward to below the top frame assembly (2), and its bottom being connected to the base assembly (4). The base frame assembly (1), the top frame assembly (2) and the support column assembly (3) are all connected at spatial nodes through connecting node parts (5).

2. The protective cover for a conveyor roller according to claim 1, characterized in that, The base frame assembly (1) includes a first bottom longitudinal beam (101) and a second bottom longitudinal beam (102) arranged parallel to each other, and a first bottom cross beam (1031) and a second bottom cross beam (1032) respectively connected between the two ends of the first bottom longitudinal beam (101) and the second bottom longitudinal beam (102). The top frame assembly (2) is suspended above the bottom frame assembly (1) and corresponds to the shape of the bottom frame assembly (1). The top frame assembly (2) includes a first top longitudinal beam (201), a second top longitudinal beam (202), and a first top cross beam (2031) and a second top cross beam (2032) respectively connected between the two ends of the first top longitudinal beam (201) and the second top longitudinal beam (202). The support column assembly (3) includes four vertically arranged support columns. The support columns are all vertically connected between the corners of the base frame assembly (1) and the top frame assembly (2) and extend to the bottom of the top frame assembly (2). Their bottoms are connected to the base assembly (4) to enclose the side space of the conveyor roller track. The base assembly (4) includes 4 bases and 4 vertical square tubes connected to their top surfaces. The 4 vertical square tubes are respectively connected to 4 supporting columns. The 4 bases are fixed on the frames on both sides of the conveyor roller conveyor. The connecting node (5) is located at the intersection of the base frame assembly (1), the top frame assembly (2) and the support column assembly (3) to realize the detachable or fixed connection between the components.

3. A protective cover for a conveyor roller according to claim 2, characterized in that, The four vertically arranged support columns of the support column assembly (3) include a first support column (301), a second support column (302), a third support column (303), and a fourth support column (304). The four vertical square tubes of the base assembly (4) include a first vertical square tube (401) that is vertically connected to the first support column (301), a second vertical square tube (402) that is vertically connected to the second support column (302), a third vertical square tube (403) that is vertically connected to the third support column (303), and a fourth vertical square tube (404) that is vertically connected to the fourth support column (304).

4. A protective cover for a conveyor roller according to claim 3, characterized in that, The first bottom longitudinal beam (101), the second bottom longitudinal beam (102), the first bottom transverse beam (1031), the second bottom transverse beam (1032), the first top longitudinal beam (201), the second top longitudinal beam (202), the first top transverse beam (2031), the second top transverse beam (2032), the first support column (301), the second support column (302), the third support column (303), and the fourth support column (304) are all square tube structures.

5. A protective cover for a conveyor roller according to claim 4, characterized in that, The connecting node (5) includes a first corner node (501), a second corner node (502), a third corner node (503), and a fourth corner node (504) located at the four corners of the base frame assembly (1). The fifth corner node (505), the sixth corner node (506), the seventh corner node (507) located at the four corners of the top frame assembly (2) and the eighth corner node (508).

6. A protective cover for a conveyor roller according to claim 5, characterized in that, The first corner node (501), the second corner node (502), the third corner node (503), the fourth corner node (504), the fifth corner node (505), the sixth corner node (506), the seventh corner node (507), and the eighth corner node (508) are three-dimensional four-way connectors.

7. A protective cover for a conveyor roller according to claim 6, characterized in that, The main socket of the first corner node (501) is connected to the front end of the first bottom longitudinal beam (101) and the inner end of the first bottom transverse beam (1031), respectively. The first support column (301) passes through the cavity of the first corner node (501) and is connected to the first vertical square tube (401). The main socket of the second corner node (502) is connected to the front end of the second bottom longitudinal beam (102) and the outer end of the first bottom transverse beam (1031), respectively. The second support column (302) passes through the cavity of the second corner node (502) and is connected to the second vertical square tube (402). The main socket of the third corner node (503) is connected to the rear end of the first bottom longitudinal beam (101) and the inner end of the second bottom transverse beam (1032), respectively. The third support column (303) passes through the cavity of the third corner node (503) and is connected to the third vertical square tube (403). The main socket of the fourth corner node (504) is connected to the rear end of the second bottom longitudinal beam (102) and the outer end of the second bottom transverse beam (1032), respectively. The fourth support column (304) passes through the cavity of the fourth corner node (504) and is connected to the fourth vertical square tube (404). The main socket of the fifth corner node (505) is connected to the front end of the first top longitudinal beam (201), the inner end of the first top transverse beam (2031), and the top end of the first support column (301), respectively. The main socket of the sixth corner node (506) is connected to the front end of the second top longitudinal beam (202), the outer end of the first top transverse beam (2031), and the top of the second support column (302), respectively. The main socket of the seventh corner node (507) is connected to the rear end of the first top longitudinal beam (201), the inner end of the second top transverse beam (2032), and the top of the third support column (303), respectively. The main socket of the eighth corner node (508) is connected to the rear end of the second top longitudinal beam (202), the outer end of the second top transverse beam (2032), and the top of the fourth support column (304).

8. A protective cover for a conveyor roller according to claim 7, characterized in that, A height adjustment structure is provided between the base assembly (4) and the support column assembly (3).

9. A protective cover for a conveyor roller according to claim 8, characterized in that, The height adjustment structure includes multiple positioning holes axially opened at the lower part of the first support column (301), the second support column (302), the third support column (303) and the fourth support column (304). The first vertical square tube (401), the second vertical square tube (402), the third vertical square tube (403) and the fourth vertical square tube (404) of the base assembly (4) are respectively provided with connecting holes axially. The positioning holes of different heights are selected for bolt fixing connection to adjust the overall height of the multi-layer three-dimensional frame structure.

10. A protective cover for a conveyor roller according to claim 1, characterized in that, The protective layer is made of transparent or opaque flexible or rigid materials.

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