Anti-leakage structure of spiral conveyor for kitchen waste

Abstract

The utility model relates to a kind of anti-seepage structure of spiral conveyor for kitchen waste, including conveyor barrel, servo motor, spiral shaft, spiral blade and installation side frame;Reinforcing layer is provided on the conveyor barrel of the edge outside of spiral blade;Reinforcing layer sequentially includes sealing filling layer, structure reinforcing layer and wear-resistant protective layer from inside to outside.The utility model is specially aimed at the problem that the conveyor barrel seeps due to the easy wear of spiral blade edge in the kitchen waste conveying process, and the structure of reinforcing layer is set on the conveyor barrel of the edge outside of spiral blade.The reinforcing layer sequentially includes sealing filling layer, structure reinforcing layer and wear-resistant protective layer from inside to outside, and each layer cooperates, greatly improves the anti-seepage performance and service life of conveyor barrel.

Description

Technical Field

[0001] This utility model relates to the technical field of food waste transportation, and in particular to a leak-proof structure for a screw conveyor for food waste. Background Technology

[0002] Screw conveyors transport materials along fixed troughs or pipes using rotating helical blades and are widely used in fields such as food waste treatment. However, existing screw conveyors have the following problems: A search revealed a Chinese patent publication number, CN204999197U, which discloses a conveyor including an outer cylinder, internal spiral conveying blades, a motor drive device, and a bottom device for the spiral conveyor. The shaft end of the other end of the internal spiral conveying blades is provided with a trapezoidal thread structure and is placed in the through hole of a positioning flange. The outer end of the through hole of the positioning flange is sealed by a rotary bearing.

[0003] In summary, existing screw conveyors have the following problems: 1. Severe wear of the spiral blades: After long-term operation, the wall thickness at the bottom of the spiral is reduced due to repeated friction, until it is worn through and leaks.

[0004] 2. Difficult to maintain: Welding is difficult after wear, and replacing the entire spiral blade is time-consuming and labor-intensive, affecting the production schedule.

[0005] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a leak-proof structure for a screw conveyor for kitchen waste, making it more valuable for industrial use. Utility Model Content

[0006] To solve any of the above-mentioned technical problems, the purpose of this utility model is to provide a leak-proof structure for a screw conveyor for kitchen waste.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A leak-proof structure for a screw conveyor for food waste includes a conveyor cylinder, a servo motor, a screw shaft, screw blades, and mounting side frames. The conveyor cylinder is installed between two mounting side frames on the left and right sides. The output end of the servo motor is connected to the screw shaft located inside the conveyor cylinder through a coupling. Several screw blades are installed on the screw shaft. A reinforcing layer is provided on the conveyor cylinder on the outer edge of the spiral blades; The reinforcement layer, from the inside out, includes a sealing and filling layer, a structural reinforcement layer, and a wear-resistant protective layer. The sealing and filling layer is an epoxy resin layer, the structural reinforcement layer is a fiber cloth, and the wear-resistant protective layer is a polyurethane elastomer coating.

[0008] As a further improvement of this utility model, the number of structural reinforcement layers is three, and a sealing filling layer is provided on the inner and outer sides of each structural reinforcement layer, and a wear-resistant protective layer is provided on the outer side of the outermost sealing filling layer.

[0009] As a further improvement of this utility model, the epoxy resin layer is composed of epoxy resin and curing agent, and the ratio of epoxy resin to curing agent is 2:1.

[0010] As a further improvement of this utility model, the fiber cloth has a two-way woven structure.

[0011] As a further improvement of this utility model, the fiber cloth is a basalt fiber cloth structure.

[0012] As a further improvement of this utility model, the thickness of the sealing filling layer is 0.5~1.0mm, the thickness of the structural reinforcement layer is 0.2~0.5mm, and the thickness of the wear-resistant protective layer is 1.0~1.5mm.

[0013] As a further improvement of this utility model, silicon carbide particles are filled into the polyurethane elastomer coating.

[0014] By means of the above solution, this utility model has at least the following advantages: This invention specifically addresses the problem of leakage in the conveyor cylinder caused by easy wear of the spiral blade edges during the conveying of kitchen waste. It designs a structure with a reinforcing layer on the conveyor cylinder outside the spiral blade edges. This reinforcing layer, from the inside out, includes a sealing and filling layer, a structural reinforcement layer, and a wear-resistant protective layer. These layers work synergistically to significantly improve the leakage prevention performance and service life of the conveyor cylinder.

[0015] This utility model's reinforcement layer covers the high-wear area (outer cylinder of the spiral blade edge), proactively preventing leakage rather than simply repairing it afterward.

[0016] The localized reinforcement layer of this invention can be repaired on-site without replacing the entire machine, greatly reducing downtime.

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the anti-leakage structure of a screw conveyor for kitchen waste according to this utility model; Figure 2 This is a schematic diagram of the structure of the first embodiment of the reinforcing layer in this utility model; Figure 3 This is a schematic diagram of the second embodiment of the reinforcing layer in this utility model.

[0020] The meanings of the labels in the figures are as follows.

[0021] 1. Conveyor cylinder; 2. Servo motor; 3. Coupling; 4. Screw shaft; 5. Screw blades; 6. Mounting side frame; 7. External bushing; 8. Reinforcing layer; 9. Feed inlet; 10. Discharge outlet. 81. Sealing filler layer; 82. Structural reinforcement layer; 83. Wear-resistant protective layer. Detailed Implementation

[0022] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] The first embodiment of this utility model: like Figure 1 and Figure 2As shown, the leak-proof structure of a screw conveyor for kitchen waste in this embodiment includes a conveyor cylinder 1, a servo motor 2, a screw shaft 4, screw blades 5, and mounting side frames 6. The conveyor cylinder 1 is installed between the left and right mounting side frames 6. The output end of the servo motor 2 is connected to the screw shaft 4 located inside the conveyor cylinder 1 through a coupling 3. The other side of the screw shaft 4 passes through the mounting side frame 6 and is connected to the bearing in the external bushing 7 installed on the mounting side frame 6.

[0025] Several helical blades 5 are installed on the helical shaft 4.

[0026] The conveyor cylinder 1 is made of stainless steel (such as SUS304) in a cylindrical shape with a wall thickness of 6~8mm. The inlet / outlet is connected to both ends by flanges. The conveyor cylinder 1 is fixed to the left and right mounting brackets 6 by bolts. The height of the brackets is adjustable to accommodate the inclination angle (0°~30°). The conveyor cylinder 1 is equipped with an inlet 9 and an outlet 10.

[0027] Servo motor 2 is installed at the feed end of the cylinder, with an output power of 5.5~7.5kW, and is rigidly connected to the screw shaft 4 via coupling 3. The screw shaft is made of 40Cr alloy steel with a chrome-plated surface (0.1mm thickness).

[0028] Spiral blade 5: Multiple blades are welded equidistantly onto the spiral shaft, with a gap of ≤2mm between the outer diameter of the blade and the inner wall of the cylinder. The blade edges are made of high-chromium cast iron (hardness HRC≥55) to reduce direct friction with the cylinder.

[0029] A reinforcing layer 8 is provided on the conveyor cylinder 1 on the outer edge of the spiral blade 5. The reinforcing layer 8 consists of a three-layer structure from the inside to the outside, consisting of a sealing filling layer 81, a structural reinforcement layer 82, and a wear-resistant protective layer 83.

[0030] Sealing and Filling Layer 81: The innermost layer, composed of epoxy resin and hardener mixed in a 2:1 ratio (epoxy resin type E-44, hardener is polyamide 650), with a thickness of 0.5~1.0mm. Before application, the cylinder surface must be sandblasted to a cleanliness level of Sa2.5 (anchor pattern depth 40~70μm). Function: Fills micro-cracks and blocks leakage paths.

[0031] Structural Reinforcement Layer 82: Middle layer, made of basalt fiber cloth (tensile strength ≥4800MPa), woven in both warp and weft directions (warp density 12 bundles / cm, weft density 10 bundles / cm). Thickness 0.2~0.5mm. When laying, it is overlapped at a 45° angle (adjacent layers have a 90° angle), with an overlap width of ≥20mm for each layer. Function: Resisting axial / circumferential stress and preventing crack propagation.

[0032] Wear-resistant protective layer 83: The outermost layer is a polyurethane elastomer coating (Shore hardness 85A) incorporating 20% ​​silicon carbide particles (200 mesh). Thickness 1.0~1.5mm, applied using an airless spraying process. Function: Resists impact wear from materials and reduces the coefficient of friction (μ≤0.15).

[0033] A brief description of the processing of the aforementioned reinforcing layer 8: Construction environment: temperature 15~35℃, humidity <70%. Epoxy resin viscosity controlled at 450~600mPa·s (adjusted by adding phenyl glycidyl ether diluent).

[0034] Material preparation: Pour the resin and curing agent into a container at a ratio of 2:1, and stir at high speed for 3-5 minutes until uniform, ensuring no particulate sediment (use within 30 minutes after mixing to avoid curing).

[0035] First layer application: Use a brush to evenly apply the mixed sealant filler layer 81 to the sanded leaking area, with a thickness controlled at 0.5-1mm, as the bottom bonding layer. Let it stand for 5 minutes until the surface is slightly dry. After application, cure at room temperature for 1 hour.

[0036] Fiber cloth laying: Take a piece of fiber cloth (i.e., structural reinforcement layer 82) cut to 1.5 times the area of ​​the leakage area, with a thickness of 0.2-0.3mm, and lay it flat on the surface of the first layer. Use a scraper to gently press the fiber cloth to ensure it adheres completely, remove air bubbles, and ensure a tight bond between the fiber cloth and the resin. Roller defoaming (pressure 0.2~0.5MPa), and UV-assisted curing (wavelength 365nm, intensity 25W / cm²) for 3 minutes.

[0037] The second embodiment of this utility model: like Figure 3 As shown, a reinforcing layer 8 is provided on the conveyor cylinder 1 on the outer edge of the spiral blade 5. The reinforcing layer 8 includes, from the inside to the outside, a sealing filler layer 81, a structural reinforcement layer 82, and a wear-resistant protective layer 83. There are three structural reinforcement layers 82. A sealing filler layer 81 is provided on both the inner and outer sides of each structural reinforcement layer 82, and a wear-resistant protective layer 83 is provided on the outer side of the outermost sealing filler layer 81.

[0038] Sealing and Filling Layer 81: The innermost layer, composed of epoxy resin and hardener mixed in a 2:1 ratio (epoxy resin type E-44, hardener is polyamide 650), with a thickness of 0.5~1.0mm. Before application, the cylinder surface must be sandblasted to a cleanliness level of Sa2.5 (anchor pattern depth 40~70μm). Function: Fills micro-cracks and blocks leakage paths.

[0039] Structural Reinforcement Layer 82: Middle layer, made of basalt fiber cloth (tensile strength ≥4800MPa), woven in both warp and weft directions (warp density 12 bundles / cm, weft density 10 bundles / cm). It consists of three layers, each 0.2~0.5mm thick. During installation, the layers are overlapped at a 45° angle (adjacent layers at a 90° angle), with an overlap width ≥20mm for each layer. Function: Resisting axial / circumferential stress and preventing crack propagation.

[0040] Wear-resistant protective layer 83: The outermost layer is a polyurethane elastomer coating (Shore hardness 85A) incorporating 20% ​​silicon carbide particles (200 mesh). Thickness 1.0~1.5mm, applied using an airless spraying process. Function: Resists impact wear from materials and reduces the coefficient of friction (μ≤0.15).

[0041] In addition, to improve high temperature resistance (suitable for pyrolysis processes), the wear-resistant protective layer can be replaced with an organosilicon-modified ceramic coating (temperature resistance up to 400℃).

[0042] Each structural reinforcement layer 82 is coated with a sealing filler layer 81 on both the inner and outer sides to ensure full impregnation of the fiber cloth (impregnation rate > 95%).

[0043] A wear-resistant protective layer 83 is provided on the outside of the outermost sealing and filling layer 81, forming an alternating structure of "epoxy resin-fiber cloth-epoxy resin-wear-resistant layer" (total thickness 2.5~4.0mm).

[0044] A brief description of the processing of the aforementioned reinforcing layer 8: Material preparation: Pour the resin and curing agent into a container at a ratio of 2:1, and stir at high speed for 3-5 minutes until uniform, ensuring no particulate sediment (use within 30 minutes after mixing to avoid curing).

[0045] Construction environment: temperature 15~35℃, humidity <70%. Epoxy resin viscosity controlled at 450~600mPa·s (adjusted by adding phenyl glycidyl ether diluent).

[0046] Innermost layer application: Use a brush to evenly apply the mixed sealant filler layer 81 to the sanded leakage area, with a thickness controlled at 0.5-1mm, as the bottom bonding layer. Let it stand for 5 minutes until the surface is slightly dry. After application, cure at room temperature for 1 hour.

[0047] Fiber cloth laying: Take a piece of fiber cloth (i.e., structural reinforcement layer 82) cut to 1.5 times the area of ​​the leakage area, with a thickness of 0.2-0.3mm, and lay it flat on the surface of the first layer. Use a scraper to gently press the fiber cloth to ensure it adheres completely, removing air bubbles and ensuring a tight bond between the fiber cloth and the resin. Defoaming is performed by roller pressing (pressure 0.2~0.5MPa), followed by UV-assisted curing (wavelength 365nm, intensity 25W / cm²) for 3 minutes. The fiber cloth consists of three layers, with a sealing and filling layer 81 coated on both the inner and outer surfaces of each layer.

[0048] Apply a wear-resistant layer: Apply a wear-resistant protective layer 83 to the outside of the outermost sealing and filling layer 81, and cure with hot air at 60°C for 30 minutes after spraying.

[0049] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0050] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A leak-proof structure for a screw conveyor for kitchen waste, comprising a conveyor cylinder (1), a servo motor (2), a screw shaft (4), screw blades (5), and mounting side frames (6). The conveyor cylinder (1) is installed between two mounting side frames (6). The output end of the servo motor (2) is connected to the screw shaft (4) located inside the conveyor cylinder (1) via a coupling (3). Several screw blades (5) are installed on the screw shaft (4). Its features are: A reinforcing layer (8) is provided on the conveyor cylinder (1) on the outer edge of the spiral blade (5); The reinforcement layer (8) includes, from the inside out, a sealing and filling layer (81), a structural reinforcement layer (82), and a wear-resistant protective layer (83). The sealing and filling layer (81) is an epoxy resin layer, the structural reinforcement layer (82) is a fiber cloth, and the wear-resistant protective layer (83) is a polyurethane elastomer coating.

2. The anti-leakage structure for a screw conveyor for kitchen waste as described in claim 1, characterized in that, The number of structural reinforcement layers (82) is three. A sealing filling layer (81) is provided on the inner and outer sides of each structural reinforcement layer (82), and a wear-resistant protective layer (83) is provided on the outer side of the outermost sealing filling layer (81).

3. The anti-leakage structure for a screw conveyor for kitchen waste as described in claim 1, characterized in that, The fiber cloth has a two-way woven structure.

4. The anti-leakage structure for a screw conveyor for kitchen waste as described in claim 1, characterized in that, The fiber cloth is a basalt fiber cloth structure.

5. A leak-proof structure for a screw conveyor for kitchen waste as described in claim 1 or 2, characterized in that, The thickness of the sealing filling layer (81) is 0.5~1.0mm, the thickness of the structural reinforcement layer (82) is 0.2~0.5mm, and the thickness of the wear-resistant protective layer (83) is 1.0~1.5mm.

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