A screw conveyor for preventing sticking of micro powder

Abstract

This utility model discloses an anti-adhesion micro powder spiral conveying device, including a conveyor housing, at least two pairs of support legs distributed at the bottom of the conveyor housing, a spiral conveyor installed in the inner cavity of the conveyor housing, a power component connected to the central shaft end of the spiral conveyor, a hopper at the bottom of the conveyor housing, and an anti-adhesion control mechanism on the conveyor housing. This utility model relates to the technical field of feeding devices. This device completely solves the problems of micro powder adhesion and dust dispersion during conveying through a triple anti-adhesion design: the high-frequency, low-amplitude vibration of the bottom excitation motor destroys the initial adhesion layer; the chrome-plated spiral auger reduces adhesion; and the top negative pressure cleaning mechanism brushes away clumps and sucks up dust in a closed environment, achieving clean conveying with short-time shutdown and no dispersion, eliminating the risk of dust explosion, and greatly improving efficiency and safety.

Description

Technical Field

[0001] This utility model relates to the field of feeding device technology, specifically to an anti-sticking micro powder spiral conveyor device. Background Technology

[0002] In modern powder conveying and feeding processes, threaded conveyor devices are needed to transport powder to higher levels. During the conveying process, due to the small diameter of the powder particles, the powder tends to stick to the surface of the threaded conveyor. This is due to static electricity on the surface of the threaded conveyor or the moisture content of the powder.

[0003] Currently, the main solutions for micro powder adhering to the surface of the conveying device are to clean or heat the powder to improve the smoothness of material conveying. However, cleaning requires long downtime, which is cumbersome and affects the conveying efficiency of micro powder. Currently, there are also methods to vibrate and discharge micro powder using vibration and air hammers. However, these methods can cause micro dust to adhere to the inner wall of the conveying device or for micro dust to escape into the external space and pollute the environment. In severe cases, the concentration of dust in the environment may be too high, leading to explosions and other problems. In view of this, this case was developed through in-depth research on the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an anti-sticking micro powder spiral conveying device, which solves the existing technical problems.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: an anti-adhesion micro powder spiral conveying device, including a conveyor housing, at least two pairs of support legs distributed at the bottom of the conveyor housing, a spiral conveyor installed in the inner cavity of the conveyor housing, a power component connected to the central shaft end of the spiral conveyor, a hopper provided at the bottom of the conveyor housing, and an anti-adhesion control mechanism provided on the conveyor housing;

[0006] A pair of excitation motors are installed at the bottom of the conveyor housing;

[0007] The anti-adhesion control mechanism includes a control housing, which is installed on the top of the conveyor housing. A cleaning groove is provided inside the control housing. The bottom end of the cleaning groove corresponds to the top discharge port of the conveyor housing. A negative pressure pipe is provided on the top of the cleaning groove. The negative pressure pipe is connected to an external negative pressure vacuum machine. A control valve is provided at the connection between the top of the cleaning groove and the negative pressure pipe.

[0008] The anti-adhesion control mechanism also includes a partition plate, a partition plate is provided in the middle of the cleaning groove, a separation net is provided on the partition plate, a cleaning rotary plate is provided on the partition plate, and a cleaning brush is provided at the bottom of the cleaning rotary plate to cooperate with the separation net.

[0009] Preferably, the screw conveyor is a straight screw conveyor, and the surface of the screw conveyor is coated with a chrome plating.

[0010] Preferably, the cleaning rotary plate has an annular structure, and a fixing plate is radially arranged in the middle of the cleaning rotary plate, the fixing plate being connected to the cleaning brush.

[0011] Preferably, a control rod is provided on the central axis of the fixed plate, the control rod passes through the control valve, and a cleaning motor is connected to the end of the control rod.

[0012] Preferably, the power assembly includes a power motor, which is mounted on the conveyor housing via a mounting bracket. A speed reducer is connected to the drive end of the power motor, and the speed reducer is connected to the central shaft end of the screw conveyor.

[0013] Beneficial effects

[0014] This invention provides an anti-adhesion micro-powder spiral conveyor device. It offers the following advantages: This device completely solves the problems of micro-powder adhesion and dust dispersion during conveying through a triple anti-adhesion design: the bottom vibrating motor uses high-frequency, low-amplitude vibration to break down the initial adhesion layer; the chrome-plated spiral auger reduces adhesion; and the top negative pressure cleaning mechanism brushes away clumps and sucks up dust in a closed environment, achieving clean conveying with short-term shutdown and no dust dispersion, eliminating the risk of dust explosion, and significantly improving efficiency and safety. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the anti-adhesion micro powder spiral conveying device of this utility model.

[0016] Figure 2 This is a cross-sectional structural schematic diagram of the anti-adhesion micro powder spiral conveying device of this utility model.

[0017] Figure 3 This is a partial cross-sectional view of the anti-adhesion micro powder spiral conveying device of this utility model.

[0018] Figure 4 This is a partially enlarged structural diagram of the anti-adhesion micro powder spiral conveying device of this utility model.

[0019] In the diagram: 1. Conveyor housing; 2. Support legs; 3. Screw conveyor; 4. Power unit; 5. Loading hopper; 6. Anti-adhesion control mechanism; 7. Vibration motor; 41. Power motor; 42. Reducer; 61. Control housing; 62. Negative pressure pipe; 63. Control valve; 64. Isolation plate; 65. Separation net; 66. Cleaning plate; 67. Cleaning brush; 68. Control rod; 69. Cleaning motor. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This utility model provides an implementation scheme: Currently, the main solutions for micro-powder adhering to the surface of the conveying device are cleaning or heating the powder to improve the smoothness of material conveying. However, cleaning requires long-term machine downtime, which is cumbersome and affects the conveying efficiency of micro-powder. Currently, there are also methods using vibration and air hammers to vibrate and discharge micro-powder. However, these methods can cause micro-dust to adhere to the inner wall of the conveying device or for micro-dust to escape into the external space, polluting the environment. In severe cases, this can lead to excessively high dust concentrations in the environment, causing explosions and other problems.

[0022] To solve the above-mentioned technical problems, this application discloses an anti-adhesion micro powder spiral conveying device. The device includes a conveyor housing 1 as the main structure. At least two pairs of support legs 2 are distributed at the bottom of the conveyor housing 1 to provide stable support. The core conveying component, a spiral conveyor 3, is assembled in the inner cavity of the conveyor housing 1. The spiral conveyor 3 is preferably a straight spiral auger. Its surface is coated with a chrome-plated coating to reduce surface energy and reduce micro powder adhesion. A power component 4 that provides power is connected to the central shaft end of the spiral conveyor 3. A material receiving hopper 5 is provided at the bottom of the conveyor housing 1. An anti-adhesion control mechanism 6 is provided on the conveyor housing 1 to solve the problems of micro powder adhesion and dust dispersion.

[0023] The anti-adhesion control mechanism 6 includes a control housing 61, which is installed on the top of the conveyor housing 1. A cleaning trough is provided inside the control housing 61, and the bottom end of the cleaning trough corresponds to the top discharge port of the conveyor housing 1 to ensure that the conveyed fine powder enters the cleaning trough. A negative pressure pipe 62 is provided on the top of the cleaning trough, and the negative pressure pipe 62 is connected to an external negative pressure vacuum machine to generate negative pressure to suck up dust during the cleaning process.

[0024] A control valve 63 is provided at the connection between the top of the cleaning tank and the negative pressure pipe 62 to open and close the negative pressure channel. An isolation plate 64 is provided in the middle of the cleaning tank. A separation net 65 is provided on the isolation plate 64 (allowing gas to pass through but blocking larger particles). A cleaning rotary plate 66 is provided on the isolation plate 64 to perform the cleaning function. The cleaning rotary plate 66 is designed as a ring structure. A cleaning brush 67 is provided at its bottom, which fits precisely with the upper surface of the separation net 65. A fixing plate is provided radially in the middle of the cleaning rotary plate 66 to install and support the cleaning brush 67. A control rod 68 is provided on the central axis of the fixing plate. The control rod 68 passes through the control valve 63 upward. The end of the control rod 68 is connected to a cleaning motor 69 that drives the cleaning rotary plate 66 to rotate.

[0025] A pair of vibrating motors 7 are installed at the bottom of the conveyor housing 1. This design is the first line of defense against adhesion. The high-frequency, low-amplitude vibration generated by the vibrating motors 7 acts directly on the bottom of the conveyor housing 1, effectively destroying the adhesion layer or bridging formed by the micro powder on the inner wall of the housing, promoting the smooth flow of the material and entering the conveying area of ​​the screw conveyor 3, while avoiding the risk of dust dispersion caused by traditional violent vibration methods.

[0026] Workflow: Micro-powder material enters the conveyor housing 1 from the bottom hopper 5. The power unit 4 drives the screw conveyor 3 to rotate, propelling the micro-powder along the conveyor housing 1 towards the top. During this process, a pair of vibrating motors 7 at the bottom of the conveyor housing 1 continuously operate, generating high-frequency, low-amplitude vibrations. This effectively prevents the micro-powder from adhering to the inner wall of the conveyor housing 1 over a large area or forming bridging, ensuring the initial smoothness of material conveying. The micro-powder material conveyed to the top by the screw conveyor 3 is discharged through the discharge port at the top of the conveyor housing 1. When the material accumulates on the inner surface of the conveyor housing 1 and the screw conveyor 3, the conveying stops, and the frequency of the vibrating motors 7 is increased. The control valve 63 is opened, and an external negative pressure vacuum machine forms a vacuum in the cleaning tank through the negative pressure pipe 62. A negative pressure environment is created, and the cleaning motor 69 starts. Through the control lever 68, the fixed plate and the cleaning rotary plate 66, along with the cleaning brush 67 at its bottom, rotate. The rotating cleaning brush 67 is closely attached to the upper surface of the separation net 65 of the isolation plate 64, gently agitating and brushing the fine powder falling into the cleaning tank. The agitation and brushing of the cleaning brush 67 effectively disperses the slight clumps that may form in the fine powder during the conveying process and prevents them from adhering again on the surface of the separation net 65 or the inner wall of the cleaning tank. The fine dust generated during the cleaning process is forcibly sucked into the negative pressure tank under the negative pressure in the cleaning tank and separated and isolated by the separation net 65. After the negative pressure stops, the collected powder falls into the discharge port under the action of gravity.

[0027] As a preferred option, the screw conveyor 3 is a straight screw auger, and the chrome-plated coating on its surface significantly reduces the tendency of micro powder to adhere.

[0028] As a preferred option, the cleaning plate 66 is further designed as a ring structure, with a fixing plate radially arranged in the middle to effectively support and fix the cleaning brush 67, ensuring uniform contact with the separation net 65.

[0029] As a preferred option, the control rod 68 on the central axis of the fixed plate passes through the control valve 63 and connects to the cleaning motor 69 to realize power transmission and rotation control.

[0030] As a preferred embodiment, the aforementioned power assembly 4 further includes a power motor 41, which is securely mounted on the conveyor housing 1 via a mounting bracket. The drive end of the power motor 41 is connected to a reducer 42, and the output end of the reducer 42 is connected to the central shaft end of the screw conveyor 3, providing suitable conveying torque and speed. The power motor 41 and the reducer 42 provide stable and reliable conveying power, and the mounting bracket ensures its stable operation.

[0031] As a preferred option, the excitation motors 7 are arranged in pairs at the bottom of the conveyor housing 1 to provide a balanced and effective anti-sticking vibration force.

[0032] In summary, this device completely solves the problems of powder adhesion and dust dispersion during conveying through a triple anti-sticking design: the high-frequency, low-amplitude vibration of the bottom excitation motor breaks down the initial adhesion layer; the chrome-plated spiral auger reduces adhesion; and the negative pressure cleaning mechanism at the top brushes away clumps and sucks up dust in a closed environment, achieving clean conveying with short-term shutdown and no dispersion, eliminating the risk of dust explosion, and significantly improving efficiency and safety.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screw conveyor for preventing the sticking of micro powder, comprising a conveyor housing (1), wherein at least two pairs of support legs (2) are distributed at the bottom of the conveyor housing (1), and a screw conveyor (3) is assembled in the inner cavity of the conveyor housing (1), characterized in that, The screw conveyor (3) is connected to a power assembly (4) at the end of its central shaft. The bottom of the conveyor housing (1) is provided with a hopper (5). The conveyor housing (1) is provided with an anti-sticking control mechanism (6). A pair of excitation motors (7) are provided at the bottom of the conveyor housing (1); The anti-adhesion control mechanism (6) includes a control housing (61), which is installed on the top of the conveyor housing (1). A cleaning groove is provided inside the control housing (61), the bottom end of which corresponds to the top discharge port of the conveyor housing (1). A negative pressure pipe (62) is provided on the top of the cleaning groove, which is connected to an external negative pressure vacuum machine. A control valve (63) is provided at the connection between the top of the cleaning groove and the negative pressure pipe (62). The anti-adhesion control mechanism (6) also includes an isolation plate (64). An isolation plate (64) is provided in the middle of the cleaning groove. A separation net (65) is provided on the isolation plate (64). A cleaning rotary plate (66) is provided on the isolation plate (64). A cleaning brush (67) is provided at the bottom of the cleaning rotary plate (66) to cooperate with the separation net (65).

2. The anti-adhesion micro powder spiral conveying device according to claim 1, characterized in that, The screw conveyor (3) is a straight screw auger, and the surface of the screw conveyor (3) is coated with a chrome plating.

3. The anti-adhesion micro powder spiral conveying device according to claim 2, characterized in that, The cleaning rotary plate (66) has an annular structure, and a fixing plate is provided radially in the middle of the cleaning rotary plate (66). The fixing plate is connected to the cleaning brush (67).

4. The anti-adhesion micro powder spiral conveying device according to claim 3, characterized in that, A control rod (68) is provided on the central axis of the fixed plate. The control rod (68) passes through the control valve (63), and a cleaning motor (69) is connected to the end of the control rod (68).

5. The anti-adhesion micro powder spiral conveying device according to claim 4, characterized in that, The power assembly (4) includes a power motor (41), which is mounted on the conveyor housing (1) via a mounting bracket. The drive end of the power motor (41) is connected to a reducer (42), which is connected to the central shaft end of the screw conveyor (3).

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