A kind of impurity removal fan for tail of grain conveying belt machine

Abstract

The utility model relates to the technical field of grain conveying and cleaning equipment, disclose a kind of for the impurity removal fan of tail section of grain conveying belt machine, including the tower-entering belt conveyor and the warehouse-out belt conveyor above, the driven roller of tower-entering belt conveyor terminal is coaxially fixedly connected with large pulley, tower-entering belt conveyor side is fixedly connected with adjustable column with long circular hole, and impurity removal fan module is slidably fixedly connected with adjustable column by fan fixing bolt through long circular hole, and the output end of impurity removal fan module is connected with fan blade, and input end is fixedly connected with small pulley, and small pulley and large pulley are driven connection by triangular belt.The utility model utilizes driven roller as power source to drive impurity removal fan, realizes the synchronous start-stop of impurity removal fan module and tower-entering belt conveyor and reduces energy consumption, and through the vertical adjustment of impurity removal fan module in long circular hole, the center distance can be conveniently adjusted to tension triangular belt, ensure that equipment long-term stable operation.

Description

Technical Field

[0001] This utility model relates to the technical field of grain conveying and cleaning equipment, and in particular to a dust removal fan for the tail end of a grain conveyor belt. Background Technology

[0002] In the grain purchasing and storage process, conveyor belts are essential logistics transmission equipment. During the process of grain being transferred from the outbound conveyor belt to the inbound conveyor belt, the grain flow often contains a large amount of corn cob fragments, wheat bran, and light dust and other impurities. If these impurities are not cleaned in time, they will enter the grain warehouse along with the grain, seriously affecting the cleanliness and ventilation of the stored grain, and causing the grain to easily heat up and become moldy during storage.

[0003] Existing conveyor-mounted cleaning devices use electric centrifugal fans for lateral blowing to remove impurities. These fans require independent drive motors and electrical control circuits. This not only increases the overall manufacturing cost and energy consumption of the equipment, but also means that if the conveyor belt stops for any reason, the independent cleaning fan often cannot stop immediately, resulting in energy waste. Furthermore, some mechanically driven cleaning devices lack flexible adjustment mechanisms, making it difficult to quickly adjust the tension after the V-belt has loosened over a long period of operation. This leads to transmission slippage and reduced airflow, severely affecting cleaning efficiency and the continuity of conveying operations.

[0004] Therefore, this utility model proposes a dust removal fan for the tail end of a grain conveyor belt to address the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems in the existing technology, the impurity removal fan of the grain conveyor belt uses an independent motor drive, which results in high energy consumption and the inability to achieve synchronous start and stop of the fan and the conveyor belt. In addition, the traditional belt drive structure lacks a convenient tension adjustment mechanism, which leads to a decrease in transmission efficiency and difficult maintenance after the V-belt loosens. The present invention aims to provide an impurity removal fan for the tail of the grain conveyor belt that has an improved structure and can effectively solve the above problems.

[0006] This utility model provides a cleaning fan for the tail end of a grain conveyor belt, including an inlet belt conveyor and an outlet belt conveyor located above the inlet belt conveyor. One end of the inlet belt conveyor is equipped with a drive system, and the other end of the inlet belt conveyor is rotatably connected to a driven roller. A large pulley is coaxially fixedly connected to the end of the driven roller. An adjustable column is fixedly connected to the side of the inlet belt conveyor near the driven roller. An elongated hole is opened in the upper part of the adjustable column. A fan fixing bolt passes through the outer wall of the cleaning fan and is fixedly connected to the adjustable column through the elongated hole. A fan blade is fixedly connected to the output end of the cleaning fan assembly, and a small pulley is fixedly connected to the input end of the cleaning fan. A V-belt is connected to the outer periphery of the small pulley and the large pulley for transmission.

[0007] Preferably, the top of the discharge conveyor belt is provided with a grain outlet, which is located directly above the inlet conveyor belt. The outlet end of the grain outlet faces the conveying surface of the inlet conveyor belt, and the grain outlet is located on the air outlet path of the impurity removal fan assembly, so that the falling grain flow can fully pass through the wind field area for air separation and impurity removal.

[0008] Preferably, the adjustable column is fixedly installed on the left side frame of the front end of the inlet belt conveyor by welding or bolting. The large pulley is fixedly installed on the left end of the driven roller, and the large pulley and the small pulley are located in the same vertical plane to ensure the smoothness of belt drive and prevent derailment.

[0009] Preferably, the impurity removal fan assembly has a rotating shaft at its center, the fan blades are fixedly connected to the front end of the rotating shaft, the small pulley is fixedly sleeved on the rear end of the rotating shaft, and the rotation plane of the fan blades is perpendicular to the conveying direction of the inlet belt conveyor, thereby generating a transverse blowing airflow.

[0010] Preferably, the outer wall of the impurity removal fan assembly is provided with a number of mounting screw holes, and the number of fan fixing bolts is multiple. The multiple fan fixing bolts pass through the elongated holes and are threadedly connected to the mounting screw holes on the outer wall of the impurity removal fan assembly, thereby improving the stability of the fan suspension through multi-point fixing.

[0011] Preferably, there are multiple elongated holes, which are arranged at linear intervals along the height direction of the adjustable column. The length extension direction of the elongated holes is parallel to the vertical center line of the adjustable column, providing vertical adjustment stroke for the impurity removal fan assembly.

[0012] Preferably, the impurity removal fan assembly is slidably connected in the vertical direction within the elongated hole by fan fixing bolts. During the sliding process, the impurity removal fan assembly changes the center distance between the small pulley and the large pulley to tension the V-belt, so that the V-belt can be quickly restored to a tensioned state when it becomes loose.

[0013] Preferably, the bottom of the discharge conveyor belt is fixedly supported on the ground or the outer frame of the inlet conveyor belt by a support frame. The discharge conveyor belt is set at an acute angle relative to the inlet conveyor belt, and gravity assists the grain to fall smoothly from the discharge conveyor belt into the inlet conveyor belt.

[0014] Preferably, the V-belt is a V-belt, with V-grooves adapted to the outer circumference of both the large and small pulleys. The V-belt is embedded in the V-grooves, and the transmission efficiency is improved by utilizing the friction generated by the V-shaped contact surface.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model solves the problem in the prior art that the impurity removal fan of the grain conveyor belt needs to be equipped with an independent motor drive, resulting in high energy consumption and the inability to achieve synchronous start and stop of the fan and the conveyor belt. It achieves full utilization of the kinetic energy generated by the operation of the conveyor belt for driving, without the need for additional power input, thus significantly reducing operating costs. It also achieves the linkage control effect of synchronous operation of the impurity removal fan assembly and the impurity removal fan of the conveyor belt.

[0017] 2. This utility model solves the problem in the prior art where the belt drive structure experiences slippage due to the loosening of the V-belt after long-term operation, and lacks a convenient tension adjustment mechanism. It achieves the ability to flexibly adjust the height of the impurity removal fan assembly according to the tightness of the V-belt, thereby changing the center distance between the small pulley and the large pulley to re-tension the V-belt, ensuring power transmission efficiency and long-term stable operation of the equipment.

[0018] 3. This utility model solves the problem in the prior art that it is difficult to effectively clean light impurities such as corn cob fragments or wheat bran mixed in during the grain conveying process by setting the impurity removal fan assembly at the front end of the inlet conveyor belt and making the lateral airflow generated by the fan blades directly act on the waterfall-shaped grain flow falling from the outlet conveyor belt. It achieves the effect of efficiently blowing away impurities in the suspended state of the grain by utilizing the difference in specific gravity between light impurities and finished grain, significantly improving the cleanliness and quality of the grain entering the warehouse. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main body of a conveying system for a tail-end impurity removal fan of a grain conveyor belt, as proposed in this utility model.

[0020] Figure 2 This is a side view of a conveying system for a tail-end impurity removal fan of a grain conveyor belt, as proposed in this utility model.

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a front view of a dust removal fan for the tail end of a grain conveyor belt, as proposed in this utility model.

[0023] Figure 5 This is a schematic diagram of the main body of a cleaning fan for the tail end of a grain conveyor belt, as proposed in this utility model.

[0024] Figure 6 This invention presents a schematic diagram of an adjustable column tensioning triangular belt for a tail-end impurity removal fan of a grain conveyor belt.

[0025] Legend:

[0026] 1. Inlet conveyor belt; 2. Outlet conveyor belt; 3. Impurity removal fan assembly; 4. Drive system; 5. Grain outlet; 6. Large pulley; 7. V-belt; 8. Small pulley; 9. Adjustable column; 10. Fan blade; 11. Passive roller; 12. Fan fixing bolt; 13. Oblong hole. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0028] Example:

[0029] Please refer to Figures 1 to 6 This utility model provides a dust removal fan for the tail end of a grain conveyor belt, which aims to solve the problems in the prior art where dust removal fans for grain conveyor belts often require an independent power source, resulting in high energy consumption and the inability to achieve synchronous start and stop of the fan and the conveyor belt, as well as the lack of a convenient tension adjustment mechanism in traditional belt drive structures, which leads to decreased transmission efficiency and difficult maintenance after the V-belt 7 becomes loose.

[0030] Please refer to Figure 1 and Figure 2A dust removal fan for the tail end of a grain conveyor belt includes an inlet conveyor belt 1 and an outlet conveyor belt 2 positioned above the inlet conveyor belt 1. The inlet conveyor belt 1 serves as the basic support platform for grain conveying, while the outlet conveyor belt 2 serves as a conveying device for feeding material to the inlet conveyor belt 1. The bottom of the outlet conveyor belt 2 is fixedly supported on the ground or the external frame of the inlet conveyor belt 1 by a support frame. The outlet conveyor belt 2 is inclined at an acute angle relative to the inlet conveyor belt 1 to facilitate the grain falling under gravity. A drive system 4 is provided at one end of the inlet conveyor belt 1 to provide conveying power, and a driven roller 11 is rotatably connected to the other end of the inlet conveyor belt 1. The driven roller 11 serves as a redirecting roller at the non-drive end of the inlet conveyor belt 1. An adjustable column 9 is fixedly connected to the side of the inlet conveyor belt 1 near the driven roller 11 by welding or bolting. The adjustable column 9 is fixedly positioned on the left side of the front end of the inlet conveyor belt 1. On the frame, the adjustable column 9 serves as the mounting carrier for the impurity removal fan assembly 3. The impurity removal fan assembly 3 is positioned on the side of the adjustable column 9 facing the conveyor surface of the inlet belt conveyor 1. Fan fixing bolts 12 pass through the outer wall of the impurity removal fan assembly 3. An elongated hole 13 is provided at the upper part of the adjustable column 9. The fan fixing bolts 12 pass through the elongated hole 13 and are fixedly connected to the adjustable column 9, thereby suspending and fixing the impurity removal fan assembly 3. A fan blade 10 is fixedly connected to the output end of the impurity removal fan assembly 3. A small pulley 8 is fixedly connected to the input end of the impurity removal fan assembly 3. A large pulley 6 is coaxially fixedly connected to the end of the driven roller 11. The large pulley 6 is fixedly located at the left end of the driven roller 11. The large pulley 6 and the small pulley 8 are located in the same vertical plane. A V-belt 7 is connected to the outer periphery of the small pulley 8 and the large pulley 6 for transmission. The V-belt 7 is used to transmit the rotational power of the driven roller 11 to the impurity removal fan assembly 3.

[0031] To further optimize the coordination between grain feeding and wind-powered impurity removal, a grain outlet 5 is provided at the top of the discharge conveyor 2. The grain outlet 5 is located directly above the inlet conveyor 1 and on the air outlet path of the impurity removal fan assembly 3. The outlet end of the grain outlet 5 faces the conveying surface of the inlet conveyor 1. When the grain falls from the grain outlet 5, it can pass through the wind field area generated by the impurity removal fan assembly 3. In order to realize the power input and wind output of the impurity removal fan assembly 3, a rotating shaft is provided at the center of the impurity removal fan assembly 3. The fan blade 10 is fixedly connected to the front end of the rotating shaft. The rotation plane of the fan blade 10 is perpendicular to the conveying direction of the inlet conveyor 1. The small pulley 8 is fixedly sleeved on the rear end of the rotating shaft. The V-belt 7 is a V-belt. The outer circumference of the large pulley 6 and the outer circumference of the small pulley 8 are both provided with V-grooves that are compatible with the V-belt 7. The V-belt 7 is embedded in the V-groove to ensure transmission stability.

[0032] There are multiple elongated holes 13, which are arranged in a straight line at intervals along the height direction of the adjustable column 9. The length extension direction of the elongated holes 13 is parallel to the vertical center line of the adjustable column 9. Several mounting screw holes are opened around the outer wall of the impurity removal fan assembly 3. There are multiple fan fixing bolts 12, which pass through the elongated holes 13 and are threadedly connected to the mounting screw holes on the outer wall of the impurity removal fan assembly 3. The impurity removal fan assembly 3 is slidably connected in the vertical direction in the elongated holes 13 by the fan fixing bolts 12. By loosening the fan fixing bolts 12 and moving the impurity removal fan assembly 3 upward, the center distance between the small pulley 8 and the large pulley 6 can be changed during the sliding process, thereby re-tensioning the V-belt 7. Then, the fan fixing bolts 12 are locked to keep the position of the impurity removal fan assembly 3 fixed.

[0033] As a preferred embodiment, in order to ensure the stability of the overall structure of the conveying system and the accuracy of power transmission, the adjustable column 9 is firmly fixed to the front left side of the frame of the inlet conveyor 1 by welding or high-strength bolts. The inlet conveyor 1 provides a rigid support foundation for the adjustable column 9. The large pulley 6 is fixedly installed on the left end face of the driven roller 11 and rotates coaxially with the driven roller 11. The outlet conveyor 2 is stably supported on the ground or the external frame of the inlet conveyor 1 by a support frame. A specific inclination angle is formed between the outlet conveyor 2 and the inlet conveyor 1 to ensure that the grain can fall smoothly and accurately onto the conveying surface of the inlet conveyor 1 under the action of gravity.

[0034] In a preferred embodiment, in order to improve the transmission efficiency between the passive roller 11 and the impurity removal fan assembly 3 and to prevent transmission slippage, the V-belt 7 is an industrial V-belt with high wear resistance and high friction coefficient. The outer circumferential surface of the large pulley 6 and the outer circumferential surface of the small pulley 8 are both provided with V-grooves that fit perfectly with the cross-sectional shape of the V-belt 7. When the V-belt 7 is tensioned, it is tightly embedded in the V-groove. The sidewall of the V-groove and the side of the V-belt 7 generate frictional driving force to ensure that the rotational kinetic energy of the passive roller 11 can be transmitted to the impurity removal fan assembly 3 without loss.

[0035] As a preferred embodiment, in order to enhance the stability of the impurity removal fan assembly 3 in the suspended state and disperse the mechanical stress at the fixing point, the number of fan fixing bolts 12 is set to multiple and evenly distributed around the outer wall of the impurity removal fan assembly 3. The number of elongated holes 13 corresponds to the number of fan fixing bolts 12 and is arranged vertically in parallel on the upper part of the adjustable column 9. The fan fixing bolts 12, together with flat washers and spring washers, pass through the elongated holes 13 and are locked in the mounting screw holes of the impurity removal fan assembly 3. The multi-point locking structure can effectively prevent the impurity removal fan assembly 3 from shifting position under the action of fan vibration or belt tension.

[0036] Working principle: When grain conveying operations are performed, the discharge conveyor 2 operates and transports the grain to the top discharge port 5. The grain falls from the discharge port 5 and forms a waterfall-like flow into the area above the inlet conveyor 1. At the same time, the drive system 4 starts and drives the inlet conveyor 1 to run. The inlet conveyor 1 drives the driven roller 11 at the front end to rotate through the conveyor belt. The driven roller 11 drives the large pulley 6, which is fixed on the same axis, to rotate synchronously. The large pulley 6 uses the tensioned V-belt 7 to drive the small pulley 8 to rotate at high speed. 8 drives the fan blades 10 of the impurity removal fan assembly 3 to rotate and generate a transverse airflow. The transverse airflow continuously blows the falling grain flow in front of the impurity removal fan assembly 3. Since the specific gravity of impurities such as corn cob fragments or wheat bran mixed in the grain is much smaller than that of the grain particles, the light impurities are blown away from the falling trajectory by the transverse airflow and discharged to the other side of the tower conveyor belt 1. The heavier finished grain continues to fall vertically into the conveyor surface of the tower conveyor belt 1 under the action of gravity and is transported away. Thus, synchronous air separation and impurity removal are achieved by utilizing the kinetic energy of the conveyor belt.

[0037] When the V-belt 7 becomes loose due to prolonged operation of the device, affecting transmission efficiency, maintenance personnel loosen the fan fixing bolt 12 passing through the elongated hole 13 to release the locking state between the impurity removal fan assembly 3 and the adjustable column 9. Then, the impurity removal fan assembly 3 is pulled upwards along the vertical direction of the elongated hole 13. The displacement of the impurity removal fan assembly 3 causes the small pulley 8 at the input end to move upwards, thereby increasing the center distance between the small pulley 8 and the large pulley 6 fixed on the driven roller 11 until the V-belt 7 returns to a taut state. At this time, the fan fixing bolt 12 is tightened again to reposition the impurity removal fan assembly 3 at the new height of the adjustable column 9, ensuring that the V-belt 7 can continuously and effectively transmit the power of the driven roller 11 to the impurity removal fan assembly 3.

Claims

1. A dust removal fan for the tail end of a grain conveyor belt, comprising: The tower feeder (1) and the warehouse discharge conveyor (2) are arranged above the tower feeder (1). One end of the tower feeder (1) is equipped with a drive system (4), and the other end of the tower feeder (1) is rotatably connected with a passive roller (11). Its features are, The passive roller (11) is coaxially fixedly connected to a large pulley (6) at its end. The tower conveyor belt (1) is fixedly connected to an adjustable column (9) on the side near the passive roller (11). An elongated hole (13) is opened on the upper part of the adjustable column (9). A fan fixing bolt (12) passes through the outer wall of the impurity removal fan assembly (3). The fan fixing bolt (12) passes through the elongated hole (13) and is fixedly connected to the adjustable column (9). A fan blade (10) is fixedly connected to the output end of the impurity removal fan assembly (3). A small pulley (8) is fixedly connected to the input end of the impurity removal fan assembly (3). A V-belt (7) is connected to the outer periphery of the small pulley (8) and the large pulley (6) for transmission.

2. The impurity removal fan for the tail end of a grain conveyor belt according to claim 1, characterized in that, The top of the discharge conveyor belt (2) is provided with a grain outlet (5), which is located directly above the inlet conveyor belt (1). The outlet end of the grain outlet (5) faces the conveying surface of the inlet conveyor belt (1), and the grain outlet (5) is located on the air outlet path of the impurity removal fan assembly (3).

3. A dust removal fan for the tail end of a grain conveyor belt according to claim 1, characterized in that, The adjustable column (9) is fixedly installed on the left side frame of the front end of the inlet belt conveyor (1) by welding or bolting. The large pulley (6) is fixedly installed on the left end of the passive roller (11), and the large pulley (6) and the small pulley (8) are located in the same vertical plane.

4. A dust removal fan for the tail end of a grain conveyor belt according to claim 1, characterized in that, The center of the impurity removal fan assembly (3) is provided with a rotating shaft, the fan blade (10) is fixedly connected to the front end of the rotating shaft, the small pulley (8) is fixedly sleeved on the rear end of the rotating shaft, and the rotation plane of the fan blade (10) is perpendicular to the conveying direction of the tower conveyor belt (1).

5. A dust removal fan for the tail end of a grain conveyor belt according to claim 1, characterized in that, The outer wall of the impurity removal fan assembly (3) is provided with a number of mounting screw holes. The number of fan fixing bolts (12) is multiple. The multiple fan fixing bolts (12) pass through the elongated hole (13) and are threadedly connected to the mounting screw holes on the outer wall of the impurity removal fan assembly (3).

6. A dust removal fan for the tail end of a grain conveyor belt according to claim 1, characterized in that, The number of the elongated holes (13) is multiple, and the multiple elongated holes (13) are arranged in a straight line at intervals along the height direction of the adjustable column (9). The length extension direction of the elongated holes (13) is parallel to the vertical center line of the adjustable column (9).

7. A dust removal fan for the tail end of a grain conveyor belt according to claim 1, characterized in that, The impurity removal fan assembly (3) is slidably connected in the vertical direction in the elongated hole (13) by the fan fixing bolt (12). During the sliding process, the impurity removal fan assembly (3) changes the center distance between the small pulley (8) and the large pulley (6) to tension the triangular belt (7).

8. A dust removal fan for the tail end of a grain conveyor belt according to claim 1, characterized in that, The bottom of the outlet conveyor belt (2) is fixedly supported on the ground or the external frame of the inlet conveyor belt (1) by a support frame, and the outlet conveyor belt (2) is inclined at an acute angle relative to the inlet conveyor belt (1).

9. A dust removal fan for the tail end of a grain conveyor belt according to claim 1, characterized in that, The V-belt (7) is a V-shaped belt. The outer circumference of the large pulley (6) and the outer circumference of the small pulley (8) are both provided with V-shaped grooves that are adapted to the V-belt (7). The V-belt (7) is embedded in the V-shaped groove.

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