Silicon powder air chute device

Abstract

The utility model discloses a kind of silicon powder air chute devices, including upper shell, lower shell and the air-permeable canvas being set between the butt joint surface of upper shell and lower shell, the horizontal pressing plate of air-permeable canvas below is fixedly connected with the lower shell, the multiple horizontal steel wires of air-permeable canvas above are fixedly connected with the upper shell;The both ends of the steel wire respectively pass the two side walls of the upper shell and are elastically connected with spring seat fixedly arranged outside the side wall of the upper shell. The utility model is through the joint action of bottom rigid support and top elastic restraint, the swing of air-permeable canvas under airflow is inhibited, fundamentally relieve its middle tear and two sides edge drop problem caused by fatigue swing, significantly prolong service life, airflow distribution is optimized by horizontal pressing plate, improve the utilization of wind.

Description

Technical Field

[0001] This utility model relates to the technical field of pneumatic conveying equipment for cement raw materials, and in particular to a silica powder air chute device. Background Technology

[0002] An air chute is a commonly used device that utilizes pneumatic conveying principles to transport dry powdery materials horizontally or inclined downwards. It mainly consists of an upper shell, a lower shell, and an air-permeable layer sandwiched between them. During operation, compressed air enters the lower shell to form an air chamber, and the airflow through the air-permeable layer fluidizes the material in the upper shell's material chamber. Under the influence of gravity, the material flows forward along the incline. Due to its lack of moving mechanical parts, simple structure, low energy consumption, and large conveying capacity, it is widely used in industries such as cement and fly ash.

[0003] With industrial upgrading, air chutes are being explored for transporting powders with more unique physicochemical properties, such as silicon powder. Silicon powder is a key raw material in the photovoltaic, semiconductor, and silicon material industries. It has extremely fine particles, high hardness, and special flowability, and is highly abrasive and prone to oxidation or even explosion in air.

[0004] Currently, when conventional air chutes transport such materials, under high pressure or unstable airflow conditions, the middle of the breathable canvas experiences violent up-and-down "bulging" or wave-like oscillations due to the impact of the airflow. This long-term, high-frequency fatigue oscillation easily leads to stress concentration at the fixed edge where the breathable canvas and the chute body are pressed together, eventually causing the pressed edge to loosen or the canvas itself to tear, severely shortening the canvas's service life and causing material conveying interruptions. Because canvas damage is frequent, replacement requires machine shutdown and disassembly of the chute body, a cumbersome process that seriously affects production efficiency and increases maintenance costs.

[0005] Therefore, there is an urgent need for an air chute structure that can effectively suppress the swaying of the permeable layer, prevent its edges from falling off in a short time, and significantly extend its service life. Utility Model Content

[0006] This invention provides a silicon powder air chute device that solves the problems of large swing amplitude of the traditional air permeable layer, easy edge detachment in a short time, short service life, and high maintenance cost.

[0007] This utility model provides a silicon powder air chute device, including an upper shell, a lower shell, and a breathable canvas disposed between the mating surfaces of the upper shell and the lower shell. A horizontal pressure plate fixedly connected to the lower shell is disposed below the breathable canvas, and a plurality of horizontally placed steel wires fixedly connected to the upper shell are disposed above the breathable canvas. The two ends of the steel wires are respectively connected to two fixed seats disposed on both sides of the bottom of the upper shell.

[0008] Furthermore, the fixing seat includes an ear seat that is fixedly connected to the side wall of the upper housing, the ear seat is provided with a positioning hole, and the end of the steel wire is fixedly connected to the positioning hole of the ear seat.

[0009] Furthermore, the horizontal pressure plate is a metal plate with through holes or a grid structure on its surface. Multiple horizontal support rods are arranged longitudinally at intervals at the bottom of the horizontal pressure plate. Each support rod is fixedly connected to the two inner walls of the lower housing at both ends. The horizontal pressure plate is fixedly connected to each support rod.

[0010] Furthermore, the plurality of steel wires are arranged parallel to each other and evenly spaced along the entire width of the breathable canvas.

[0011] Furthermore, the diameter of the steel wire is 3-6 mm, and the spacing between adjacent steel wires is 100-300 mm.

[0012] Furthermore, a wear-resistant tube is fitted onto the steel wire.

[0013] Furthermore, the size of each through hole on the horizontal pressure plate is set to decrease from the center to both sides. Compared with the prior art, the beneficial effects of this utility model are: This invention suppresses large swings of the breathable canvas by using rigid support at the bottom and elastic compression at the top, preventing fatigue damage and edge detachment of the breathable canvas in a short period of time. Wear-resistant tubes are added to the outside of the steel wire to enhance durability. The through holes on the horizontal pressure plate can be arranged in a layout that gradually narrows from the middle to both sides to optimize airflow distribution and improve wind utilization. This invention has a simple and reliable structure, which significantly extends the service life and maintenance cycle of the equipment and reduces maintenance costs. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the implementation examples will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of a silicon powder air chute device proposed in this utility model. Figure 2 Appendix to this utility model Figure 1 A magnified schematic diagram of the partial structure at positions I and II; Figure 3 This is a schematic diagram of the end structure of a silicon powder air chute device proposed in this utility model; Figure 4 Appendix to this utility model Figure 3 A magnified schematic diagram of the partial structure at position II; Figure 5 This is a schematic diagram of the distribution structure of the steel wires on the breathable canvas of the silicon powder air chute device proposed in this utility model. Figure 6 This is a schematic diagram of the horizontal pressure plate structure of a silicon powder air chute device proposed in this utility model.

[0016] In the picture: 1. Upper shell; 2. Lower shell; 21-Fixing block; 3. Breathable canvas; 4. Horizontal pressure plate; 5. Steel wire; 6. Ear seat; 7. Material chamber; 8. Air chamber. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings in a non-limiting manner. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit it. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "top", "bottom", "lateral", "longitudinal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0019] Example 1: See Figure 1-6 A silicon powder air chute device includes an upper shell 1, a lower shell 2, and a breathable canvas 3 disposed between the mating surfaces of the upper shell 1 and the lower shell 2. A horizontal pressure plate 4 fixedly connected to the lower shell 2 is disposed below the breathable canvas 3, and a plurality of horizontally placed steel wires 5 fixedly connected to the upper shell 1 are disposed above the breathable canvas 3. The two ends of the steel wires 5 are respectively connected to two fixed seats disposed on both sides of the bottom of the upper shell 1.

[0020] In the above embodiments, the basic structure of the air chute includes a trough body serving as a material flow channel, with end caps for sealing. Adjacent air chute sections are connected and extended by flanges and bolts to meet the required length. An air inlet pipe communicating with the air chamber 8 is located at the bottom of the trough body, and a feed pipe communicating with the material chamber 7 is located at the top of the trough. The air chute is made of thin steel plate and is installed at a certain angle (usually 2°-6°) during use. The trough body consists of an upper shell 1 and a lower shell 2 connected by flanges and bolts. Both the upper shell 1 and the lower shell 2 are sheet metal bent plates, with a layer of breathable canvas 3 sandwiched between them. This breathable canvas 3 is woven from high-strength synthetic fibers (such as polyester and nylon) and surface-treated, providing good breathability and abrasion resistance. The breathable canvas 3 strictly divides the internal space of the tank into two functional chambers: the material chamber 7 located above it and the air chamber 8 located below it, which are used to carry and transport the fluidized powdery or granular materials; the air chamber 8 located below it is used to introduce low-pressure air from a Roots blower or air compressor.

[0021] In the above embodiments, the horizontal pressure plate 4 is preferably made of Q235 carbon steel plate or stainless steel plate. Multiple horizontal support rods 21 are spaced longitudinally at the bottom of the horizontal pressure plate 4. Each support rod 21 is fixedly connected to the two inner walls of the lower housing 2 at both ends. The horizontal pressure plate 4 is fixedly connected to each support rod 21. Vertical threaded holes are provided on the fixing block 21. Screws are threaded through the breathable canvas 3 and the horizontal pressure plate 4 in sequence and then threaded into the threaded holes of the fixing block 21, ensuring that the plate surface is fixed in a horizontal or basically horizontal state. The function of the horizontal pressure plate 4 is to provide a complete, flat, and sturdy support for the upper breathable canvas 3. When compressed air rushes in from the air chamber 8, the horizontal pressure plate 4 can effectively support the breathable canvas 3, preventing it from undergoing excessive downward deflection due to air pressure, thereby eliminating the physical space for the canvas to swing downwards. To ensure uniform and smooth airflow, the horizontal pressure plate 4 can be a perforated plate with evenly distributed through holes of 5-15mm in diameter; alternatively, it can be a grid structure made of multiple flat steel bars welded together, with the gaps between the grids serving as ventilation channels. This ensures both structural strength and air permeability.

[0022] In this embodiment, see Figure 5Several horizontally arranged steel wires 5 are arranged on the upper surface of the breathable canvas 3. These steel wires 5 are preferably made of spring steel wire or stainless steel wire with high strength and a certain degree of toughness, and their diameter ranges from 3mm to 6mm. If they are too thin, the rigidity will be insufficient, and if they are too thick, the weight and cost will increase. All steel wires 5 are parallel to each other and laid along the entire width direction (i.e., transverse) of the air chute. In the longitudinal direction of the chute (i.e., the material flow direction), the steel wires are evenly arranged at a constant spacing of 100mm to 300mm. If the spacing is too large, the restraint effect on the central area of ​​the canvas will be weakened, and local bulges may occur; if the spacing is too small, the structure will be complex, the cost will be increased, and the flowability of the material may be affected.

[0023] In this embodiment, as Figure 2 As shown, the fixing seat includes an ear seat 6 fixedly connected to the side wall of the upper housing 1. The ear seat 6 is provided with a positioning hole. The steel wire 5 is arranged laterally at the bottom of the upper housing 1 and installed close to the bottom of the horizontal bends on both sides of the upper housing 1. The two ends of the steel wire 5 are respectively connected to the ear seats 6 provided at the ends of the horizontal bends on both sides. The steel wire 5 is fixedly connected to the positioning hole on the ear seat 6. Each ear seat 6 is welded and fixedly connected to the end face of the bends on both sides of the upper housing 1.

[0024] In this embodiment, a wear-resistant sleeve (not shown in the figure) is fitted or wrapped around the steel wire 5. The wear-resistant sleeve is made of rubber and separates the powder from the steel wire, thus protecting the steel wire. Multiple steel wires 5 are arranged at intervals along the length of the inclined groove, together forming a limiting constraint on the upper surface of the breathable canvas 3.

[0025] Further, see Figure 6 The size of each through hole on the horizontal pressure plate 4 is set to decrease from the middle to both sides. The shape of the through hole can be circular, elliptical, rectangular, or triangular. By using through holes of different sizes, the material distribution in the inclined groove is adapted to the characteristics of being thick in the middle and thin on both sides, thereby optimizing the airflow distribution and improving the utilization rate of airflow.

[0026] During operation, airflow rises from air chamber 8, causing the material to fluidize and flow in material cavity 7. Horizontal pressure plate 4 provides bottom support, and the pressed steel wire 5 inhibits upward swinging and prevents the pressed edges on both sides of the breathable canvas 3 from falling off. The two work together to ensure the stable operation of the breathable canvas 3 and greatly extend its service life.

[0027] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of the invention is indicated by the claims.

[0028] It should be understood that this utility model is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model.

Claims

1. A silicon powder air chute device, comprising an upper shell (1), a lower shell (2), and a breathable canvas (3) disposed between the mating surfaces of the upper shell (1) and the lower shell (2), characterized in that: A horizontal pressure plate (4) is fixedly connected to the lower shell (2) below the breathable canvas (3), and a plurality of horizontally placed steel wires (5) are fixedly connected to the upper shell (1) above the breathable canvas (3); the two ends of the steel wires (5) are respectively connected to two fixed seats provided on both sides of the bottom of the upper shell (1).

2. The silicon powder air chute device according to claim 1, characterized in that, The fixing seat includes an ear seat (6) fixedly connected to the side wall of the upper housing (1), the ear seat (6) is provided with a positioning hole, and the end of the steel wire (5) is fixedly connected to the positioning hole of the ear seat (6).

3. The silicon powder air chute device according to claim 1, characterized in that, The horizontal pressure plate (4) is a metal plate with through holes on its surface. Multiple horizontal support rods (21) are arranged longitudinally at intervals at the bottom of the horizontal pressure plate (4). Each support rod (21) is fixedly connected to the two inner walls of the lower housing (2) at both ends. The horizontal pressure plate (4) is fixedly connected to each support rod (21).

4. The silicon powder air chute device according to claim 1, characterized in that, Multiple steel wires (5) are arranged parallel to each other and evenly spaced along the entire width of the breathable canvas (3).

5. A silicon powder air chute device according to claim 4, characterized in that, The diameter of the steel wire (5) is 3-6 mm, and the spacing between adjacent steel wires (5) is 100-300 mm.

6. The silicon powder air chute device according to claim 5, characterized in that, A wear-resistant tube is fitted onto the steel wire (5).

7. A silicon powder air chute device according to claim 4, characterized in that, The size of each through hole on the horizontal pressure plate (4) is set to decrease from the middle to both sides.

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