CN201292165Y - Charging device capable of preventing bridging of materials in storage hopper - Google Patents

Abstract

The utility model relates to a feeding device which can prevent materials from bridging in a silo. Material conveying screw. Among them, the silo adopts the structure of cuboid or cube. The screw conveyor at the bottom of the silo includes a row of screw conveyors, which are arranged horizontally or obliquely at the bottom of the silo along the width direction. Each screw conveyor is driven by an independent speed-regulating motor I and reducer I, and can be put into operation at the same time or at intervals. The discharge conveying screw is arranged below the outlet of the screw conveyor at the bottom of the warehouse and is perpendicular to it. The device effectively overcomes the problem that wet sticky materials are easy to bridge and block in the silo, and has stable feeding, a large adjustment range of feeding amount, and flexible adjustment methods.

Description

Feeding device to prevent material from bridging in the silo

technical field

The utility model relates to a feeding device which can prevent materials from bridging in a material bin, and belongs to the technical field of material conveying.

Background technique

The wet sticky material referred to in the utility model refers to relatively viscous materials such as sludge and coal slime, and also refers to some fine powdery chemical solid wastes, coal powder, and coke with a high moisture content that are easy to bridge in the silo. Granules, chemical fertilizers, feed and other high-humidity materials. Due to the high moisture content, large angle of repose, strong adhesion, and poor fluidity of this type of material, the problem of poor flow of material bridging often occurs during the conveying or feeding process. The feeding device is an indispensable and important equipment in the process industry. Its normal and controllable operation is the premise and guarantee for the normal operation of the entire related industrial device or system.

Wet sticky materials are a class of materials often encountered in the process industry. There are many types of materials, and the mechanistic understanding of their flow and conveying characteristics is very poor. Engineering technicians and researchers put forward some measures to prevent the bridging and blockage of wet and sticky materials during the feeding process, such as setting a disturbance device in the silo, feeding fluidizing gas to fluidize the material, and forcing the silo to vibrate. wait. However, the above-mentioned measures and methods are only effective for some wet sticky materials, and cannot completely solve the problem of bridging and blocking of wet sticky materials in the silo, and the structure or device is also relatively complicated. The purpose of the utility model is to provide a wet sticky material feeding device and method with strong material adaptability, which can effectively prevent the material from bridging in the silo, the feeding amount is continuously controllable, and the system is simple and reliable.

Contents of the invention

Technical problem: The purpose of this utility model is to provide a feeding device that can prevent materials from bridging in the silo, and effectively overcome the problem of bridging and blocking in the hopper during the feeding process of wet sticky materials.

Technical solution: The utility model provides a feeding device that can prevent materials from bridging in the silo. The general idea is: the controllable feeding device for wet sticky materials is composed of a silo, multiple screw conveyors at the bottom of the silo, a discharge conveying screw, and matching speed-regulating motors and reducers. Double measures of cuboid or square silo and silo bottom conveying screw are adopted to overcome the problem of bridge blockage of wet sticky materials and ensure stable feeding; by adjusting the speed of each silo bottom screw conveyor and the output conveying screw to adjust the feeding volume to ensure the adjustment of feeding volume The range is large.

The controllable feeding device for wet sticky materials is characterized in that the device is composed of a silo, a speed-regulating motor I, a reducer I, a screw conveyor at the bottom of the silo, a speed-regulating motor II, a reducer II and a discharge conveying screw; The bottom of the warehouse is provided with a screw conveyor at the bottom of the warehouse, the power input end of the screw conveyor at the bottom of the warehouse is connected to the reducer I, the discharge end of the screw conveyor at the bottom of the warehouse is connected with the discharge conveying screw, and the conveying shaft of the discharge conveying screw is connected to the bottom of the warehouse. The conveying axis of the screw conveyor is vertical.

The silo adopts a cuboid or cube structure, and the cross-sectional size of the bottom of the silo is the same as that of the top.

The screw conveyor at the bottom of the silo, the speed reducer 1, and the speed-regulating motor 1 are connected in series and provided with multiple sets in parallel, arranged horizontally or obliquely at the bottom of the silo along the width direction, and each screw conveyor is respectively composed of a corresponding Driven by speed-regulating motor and reducer.

Usually, the silo of the feeding device adopts a conical shape or a lower conical shape and an upper cylindrical shape. Due to the continuous reduction of the flow section of this type of silo, the materials gradually converge at the small conical opening during the feeding process, and the materials are extruded and easily form bridges. Phenomenon. Whether the material can form a bridge is related to the slope of the cone surface, material particle size, shape, friction coefficient and cohesion coefficient between particles, etc. For wet and viscous materials such as sludge, coal slime, high-moisture fine powder chemical solid waste, coal powder, etc., due to the high moisture content, irregular shape, large angle of repose, and poor fluidity of the material, it is easier to use in conical or frustum-shaped silos. The formation of bridging will cause blockage, resulting in unstable or even interruption of feeding. The use of a cuboid or cube silo eliminates the conical surface of the traditional silo, which can effectively destroy the external factors of material bridging; moreover, when the material is discharged in the cuboid or cube silo, it will not be squeezed due to confluence, so that The possibility of clogging is further reduced.

The silo bottom screw conveyor includes a row of screw conveyors, and each screw conveyor is driven by an independent motor and reducer. The conveying screw at the bottom of the silo is arranged horizontally or obliquely at the bottom of the square silo along the width direction. Since each screw conveyor can be adjusted independently, the feeding speed of the locally accumulated materials above it can be individually adjusted to disturb the overall material in the silo, thereby further destroying possible material bridging.

The discharge conveying screw is arranged below the outlet of the conveying screw at the bottom of the bin, and the conveying axis of the conveying screw at the bottom of the bin is perpendicular to the conveying axis of the conveying screw at the bottom of the bin. The design conveying capacity of the discharge conveying screw is high, and its function is to ensure that all the materials flowing out from the discharge port of the conveying screw at the bottom of the warehouse are transported away, so as to prevent the material from being blocked at the discharge port of the conveying screw at the bottom of the warehouse. The discharge conveying screw does not play the role of adjusting the material conveying volume. When feeding, the wet and sticky materials in the bin move downward in the form of overall flow, and the speed of the screw conveyor at the bottom of each bin and the speed of the delivery screw are adjusted according to the requirements of the feeding volume, so as to ensure that the feeding device can achieve a large material conveying capacity , The feeding volume can be adjusted in a large range and the adjustment method is flexible. It is especially suitable for continuous and controllable feeding of wet and viscous materials such as sludge, coal slime, high-moisture fine powder chemical solid waste, and coal powder.

Beneficial effects: the feeding device of the utility model that can prevent materials from bridging in the silo has the following features and advantages:

1. The use of cuboid or cube silos eliminates the conical surface of traditional silos and effectively destroys the external factors of material bridging; moreover, when materials are unloaded in cuboid or cube silos, they will not be squeezed due to confluence. Thereby further reducing the possibility of material clogging.

2. A row of screw conveyors are arranged in parallel at the bottom of the silo. When conveying materials, the screw conveyor at the bottom of the silo is put into operation at the same time or at intervals, so that the wet and sticky materials in the silo move downward in the form of a whole flow. Cooperating with the cuboid or cube silo, it can not only effectively prevent the material from bridging and blocking, but also ensure the feeding The device can achieve a large material conveying capacity.

3. By adjusting the speed of a screw conveyor, the local feeding speed of the accumulated materials above it can be changed, which can disturb the materials in the silo, thereby further destroying possible material bridging.

4. The feeding volume of the feeding device is realized by adjusting the speed of the screw conveyor at the bottom of each warehouse. The feeding volume adjustment range is large and the adjustment method is flexible.

5. The utility model is especially suitable for continuous and controllable feeding of wet sticky materials such as sludge, coal slime, high-moisture fine powder chemical solid waste, coal powder, etc.

Description of drawings

Fig. 1 is the front view of the structure schematic diagram of the feeding device of the utility model that can prevent materials from bridging in the silo (the screw conveyor at the bottom of the silo is arranged horizontally).

Fig. 2 is a top view of the structure schematic diagram of the feeding device of the utility model that can prevent materials from bridging in the silo.

Fig. 3 is the front view of the schematic diagram of the structure of the feeding device that can prevent materials from bridging in the silo of the present invention (the screw conveyor at the bottom of the silo is arranged obliquely).

In the above figure, there are: feed bin 1, speed regulating motor I 2, reducer I 3, bottom screw conveyor 4, speed regulating motor II 5, reducer II 6 and discharge conveying screw 7.

Detailed ways

The feeding device of the utility model that can prevent materials from bridging in the silo consists of a hopper 1, a speed regulating motor I 2, a reducer I 3, a screw conveyor at the bottom of the warehouse 4, a speed regulating motor II 5, a reducer II 6 and The discharge conveying screw 7 is formed. Wherein, the silo 1 adopts a cuboid or cube structure, and the cross-sectional size of the bottom of the hopper is the same as that of the top. The square hopper 1 is used to destroy the external factors of material bridging; moreover, the material will not be squeezed due to confluence during the discharge process in the square hopper.

The feeding device of the utility model, which can prevent materials from bridging in the silo, arranges a row of parallel bottom screw conveyors 4 horizontally or obliquely along the width direction at the bottom of the silo 1, and each screw conveyor is controlled by an independent speed regulator. Motor I 2 and reducer I 3 drive. Since each screw conveyor can be adjusted independently, it can individually adjust and change the feeding speed of the locally accumulated materials above it, disturbing the overall material in the silo, and destroying possible material bridging. The dual measures of the square silo and the screw conveyor at the bottom of the silo effectively overcome the problem of bridging and blocking of wet and sticky materials.

The discharge conveying screw 7 is arranged below the outlet of the screw conveyor 4 at the bottom of the warehouse, driven by the speed-regulating motor II 5 and the reducer II 6. The conveying axis of the discharging conveying screw 7 is perpendicular to the conveying axis of the screw conveyor 4 at the bottom of the warehouse. The design conveying capacity of discharging conveying screw 7 is higher, and its effect is to ensure that the material flowing out from the conveying screw outlet at the bottom of the warehouse is all transported away, preventing the material from being blocked at the conveying screw outlet at the bottom of the warehouse. The discharge conveying screw does not play the role of adjusting the material conveying volume. When conveying, the wet and sticky materials in the warehouse move downward in the form of overall flow, adjust the speed of the screw conveyors at the bottom of each warehouse according to the requirements of the feeding volume, and then determine the corresponding output conveying screw according to the sum of the conveying volumes of the screw conveyors at the bottom of each warehouse. The rotation speed is high to ensure that all the materials flowing out of the outlet of the conveying screw at the bottom of the warehouse are transported away. The combination of the discharge conveying screw and the bottom-discharging screw conveyor can enable the feeding device to achieve a large material conveying capacity, with a large adjustment range of the conveying amount and flexible adjustment methods. It is especially suitable for continuous and controllable feeding of wet and viscous materials such as sludge, coal slime, high-moisture fine powder chemical solid waste, and coal powder.

Claims (3)

1, a kind of feeding device that prevents that material from building bridge in feed bin is characterized in that conveyor screw (4) at the bottom of this device is by feed bin (1), buncher I (2), retarder I (3), storehouse, buncher II (5), retarder II (6) and discharging conveyor screw (7) form; Conveyor screw (4) at the bottom of the below of feed bin (1) is provided with the storehouse, the power intake connection reducer I (3) of conveyor screw at the bottom of the storehouse (4), the discharge end of conveyor screw at the bottom of the storehouse (4) connects discharging conveyor screw (7), and the conveying axis of discharging conveyor screw (7) is vertical with the conveying axis of conveyor screw (4) at the bottom of the described storehouse.

2, the feeding device that prevents that material from building bridge in feed bin according to claim 1 is characterized in that described feed bin (1) adopts cuboid or cube structure, and the cross sectional dimensions of feed bin bottom is identical with the top.

3, the feeding device that prevents that material from building bridge in feed bin according to claim 1, it is characterized in that conveyor screw (4) at the bottom of the described storehouse, retarder I (3), buncher I (2) are connected in series and are provided with many parallel settings, broad ways level or be in tilted layout in the bottom of described feed bin (1), each conveyor screw are driven by cooresponding buncher and retarder respectively.

Images