A high throughput material receiving machine

Abstract

This utility model discloses a high-capacity receiving machine, relating to the field of grain conveying technology. It includes a receiving machine, a chain conveyor, and a grain storage silo. The chain conveyor has a ring-shaped conveyor belt wrapped around its chain plates, which are bolted together. A cover is provided above the chain conveyor, forming a sealed conveying channel together with the chain conveyor. The input end of the conveying channel is horizontally positioned behind the output end of the receiving machine, and the other end of the conveying channel is connected to the grain storage silo. This high-capacity receiving machine, through the semi-circular cover and the chain conveyor forming a sealed channel, combined with the negative pressure environment of the dust collector, suppresses dust diffusion at the source, solving the industry pain point of "dust overflow pollution" in traditional receiving machines. The chain conveyor adopts a "chain plate + wear-resistant belt" combination structure, significantly improving its load-bearing capacity compared to traditional belt conveyors, meeting the needs of high-capacity receiving while avoiding grain jamming problems encountered with single-chain conveyors.

Description

Technical Field

[0001] This utility model relates to the field of grain conveying technology, specifically a high-capacity receiving machine. Background Technology

[0002] Currently, bulk material trucks in China without self-unloading functions need to use receiving hoppers for unloading. However, due to the limited carrying capacity of the receiving hoppers, grain is prone to overflowing from the hoppers, and dust is severe, resulting in low unloading efficiency. Bulk material trucks with self-unloading functions can directly unload into the subsequent conveyor belt, but due to the limited carrying capacity of the conveyor belt, the unloading efficiency is very low, and it is also accompanied by dust pollution problems.

[0003] Therefore, it is necessary to propose a high-capacity material receiving machine to solve the above problems. Utility Model Content

[0004] Technical problem to be solved: The purpose of this utility model is to provide a high-volume material receiving machine to solve the problem mentioned in the background art, which is that the existing material receiving machines are limited by the load-bearing capacity of the belt conveyor, resulting in very low unloading efficiency and dust pollution.

[0005] Technical Solution: To achieve the above objectives, this utility model is implemented through the following technical solution: A high-capacity receiving machine includes a receiving machine, a chain conveyor, and a grain storage silo. The chain conveyor has an outer ring conveyor belt wrapped around its chain plates, which are bolted together. A cover is provided above the chain conveyor, forming a sealed conveying channel together with the chain conveyor. The input end of the conveying channel is horizontally positioned behind the output end of the receiving machine, and the other end of the conveying channel is connected to the grain storage silo. A notch for receiving grain is provided at the top of the cover above the input end of the chain conveyor. A dust collector is fixedly installed on the top of the grain storage silo, with its input end connected to the interior of the silo. A blockage alarm device is provided at the output end of the conveying channel.

[0006] Preferably, the cross-section of the cover is semi-circular.

[0007] Preferably, the dust collector is an insertion type dust collector.

[0008] Preferably, the material blockage alarm device is an infrared beam alarm.

[0009] Preferably, the unloading machine is a hydraulic unloading machine.

[0010] Beneficial effects: Compared with the prior art, this utility model provides a high-capacity receiving machine with a unique structure and convenient use. It forms a closed channel with the chain conveyor through a semi-circular cover, and combined with the negative pressure environment of the dust collector, it suppresses dust diffusion from the source, solving the industry pain point of "dust overflow pollution" of traditional receiving machines. Compared with open conveying equipment, dust emissions are reduced by more than 95%. The chain conveyor adopts a combination structure of "chain plate + wear-resistant belt", which greatly improves the load-bearing capacity compared with traditional belt conveyors, can meet the needs of high-capacity receiving, and avoids the problem of grain jamming when using a single chain plate conveyor. Attached Figure Description

[0011] Figure 1 This is a front view schematic diagram of the structure of this utility model.

[0012] In the diagram: 1. Unloading machine; 2. Chain conveyor; 3. Cover; 4. Blockage alarm device; 5. Grain storage silo; 6. Dust collector. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Example 1: This Example 1 provides a high-volume receiving machine, which is a direct improvement on an existing receiving machine. It has a unique structure. Please refer to [link / reference]. Figure 1 As shown, the system includes an unloading machine 1, a chain conveyor 2, a semi-circular cover 3, a blockage alarm device 4, a grain storage bin 5, and a dust collector 6. The unloading machine 1 is an existing hydraulic truck bed lifting and unloading machine. Its core function is to lift the entire grain truck (focusing on lifting the front end) through hydraulic drive, and use gravity to automatically dump the grain from the rear end of the truck bed. The specific structure, parameters, and coordination with other components are as follows: Load-bearing frame: Made of Q345B high-strength steel plate welded into shape, the frame is U-shaped (fits the chassis profile of grain transport vehicles), with a length of 6500mm (compatible with medium-sized grain transport vehicles with a wheelbase of 6-8m) and a width of 2200mm. The bottom of the frame is equipped with 4 sets of adjustable support legs (adjustment range 0-150mm) to ensure that the equipment placement level error is ≤0.1% and to avoid vehicle deviation when lifting. Hydraulic drive system: Equipped with two 22kW high-pressure hydraulic pumps (working pressure 16-20MPa), connected to four sets of double-acting hydraulic cylinders (cylinder diameter 180mm, stroke 800mm). The top of the cylinder is connected to the front end crossbeam of the load-bearing frame through a universal hinge seat. The front end is lifted by synchronous extension and retraction of the cylinders. Vehicle positioning components: Adjustable limit baffles (adjustment range 2000-2500mm) are provided on both sides of the rear end of the load-bearing frame. A 50mm thick rubber buffer pad is pasted on the inner side of the baffle to limit the parking position of the grain truck and ensure that the rear end of the truck bed is aligned with the input end notch of the chain conveyor 2. Control system: Equipped with a PLC control cabinet (model S7-1200), integrating a lifting angle sensor (measurement accuracy ±0.5°) and a pressure sensor (overload protection threshold 25MPa), supporting both manual and automatic modes. In automatic mode, the lifting angle can be preset (maximum lifting angle 35°) to prevent the vehicle from overturning due to excessive angle.

[0015] The horizontal distance between the end of the load-bearing frame of the unloading machine 1 and the input end of the chain conveyor 2 is controlled at 300-400mm. After the end of the hopper stops, the center of its discharge port is aligned with the center of the rectangular notch (500mm long × 300mm wide) on the top of the cover 3, with a deviation of ≤50mm, to prevent the grain from spilling outside the conveying channel when it is dumped, and to ensure that the grain recovery rate during the unloading process is ≥99.5%.

[0016] Chain conveyor 2 is also an existing device. The drive component is a 15kW variable frequency drive motor, which is connected to the head wheel sprocket through a reducer. The motor speed can be adjusted according to the amount of grain (5-15r / min), achieving stepless speed regulation of 0.5-1.0m / s. There are two steel sprockets with a diameter of 300mm (24 teeth) at the head and tail. The chain is a roller chain with a pitch of 50.8mm. The chain material is 40Mn steel, and the surface is carburized and quenched (hardness HRC50-55) to improve wear resistance. Each chain plate is made of Q235 wear-resistant steel plate with a thickness of 8mm and a width matching the conveying channel (1200mm). Adjacent chain plates are hinged by pins with a hinge gap of ≤2mm. The conveyor belt is wrapped around the outside of the chain plate and is made of PVC wear-resistant conveyor belt (thickness 10mm, tensile strength ≥15MPa). It is fixed to the chain plate with bolts to prevent belt slippage or deviation.

[0017] The frame is welded from No. 16 channel steel, and the bottom of the frame is equipped with adjustable support feet (adjustment range 0-100mm) to ensure that the levelness error of the conveyor is ≤0.1%. The cover 3 is made of 304 stainless steel plate bent into shape, with an inner diameter matching the conveying width of the chain conveyor 2 (1200mm) and a plate thickness of 2mm. It is fixed to both sides of the frame of the chain conveyor 2 with bolts, and together with the conveyor belt of the chain conveyor 2, it forms a closed conveying channel with a semi-circular cross section (channel height 600mm). A rectangular notch (dimensions: length 500mm × width 300mm) is opened on the top of the cover 3 above the input end of the chain conveyor 2. The edge of the notch is welded with a rounded corner guard plate (radius 20mm) to avoid edge wear caused by grain impact, and at the same time to ensure that the grain output from the unloading machine 1 can fall accurately into the conveying channel.

[0018] The top of the grain storage silo 5 has a circular feed inlet (1200mm in diameter), which is sealed to the output end of the chain conveyor 2 via a flange (the sealing gasket is made of oil-resistant rubber) to ensure the airtightness of the conveying channel and the grain storage silo 5; the bottom of the grain silo is equipped with a discharge valve (500mm in diameter) to facilitate subsequent grain transfer.

[0019] Dust collector 6 is an existing insertion-type dust collector, which is fixedly installed on the top of the grain storage silo 5 (1000mm away from the feed inlet). Its main body includes a 15kW centrifugal fan, a pleated filter cartridge (20㎡ filtration area, PTFE membrane material, filtration accuracy 1μm), a dust concentration sensor, and a negative pressure detection module. The input end of dust collector 6 is inserted into the grain storage silo 5 through a 300mm diameter stainless steel pipe (insertion depth 500mm). A grid (50mm aperture) is installed at the pipe inlet to prevent grain impact. After the fan starts, it can create a negative pressure environment of -500 to -800Pa in the grain storage silo 5 and the closed conveying channel. The dust concentration sensor (detection accuracy 0.1mg / m³) monitors the dust concentration in the silo in real time. When the concentration exceeds 5mg / m³, the fan is automatically triggered to start, realizing real-time capture and filtration of dust.

[0020] The material blockage alarm device 4 is an existing infrared beam alarm, which is installed at the connection between the output end of the chain conveyor 2 and the inlet of the grain storage silo 5, and specifically includes: Detection components: Two sets of infrared beam sensors (detection distance 1500mm, response time ≤0.1s) are symmetrically installed on both sides of the conveyor channel. The line connecting the sensor transmitter and receiver is parallel to the surface of the conveyor belt (200mm away from the belt surface) to ensure that the infrared signal can be blocked when the grain is piled up to this height. Control and alarm components: including a PLC control box (model S7-200SMART), a red alarm light (voltage 220V, brightness ≥500cd) and a buzzer (decibel ≥100dB). The control box is linked with the drive motor of the chain conveyor 2 and the fan of the dust collector 6 for coordinated control.

[0021] Working principle: The grain truck stops on the support frame of the unloading machine 1 along the guide markings. The position of the vehicle is fixed by the tail limit baffle to ensure that the tail end of the truck bed is aligned with the notch of the cover 3. The operator selects "automatic mode" in the PLC control cabinet, presets the lifting angle to 30°, and starts the unloading machine 1: the hydraulic pump drives 4 sets of oil cylinders to extend and retract synchronously, and the front end of the truck is slowly raised. During the lifting process, the angle sensor provides real-time feedback of the angle value. When 30° is reached, the oil cylinders stop extending and retracting, and the vehicle remains tilted.

[0022] As the vehicle tilts, the grain in the bucket flows out from the rear end under the action of gravity and falls precisely into the notch of the cover 3 at the input end of the chain conveyor 2. If there is a lot of grain residue in the bucket (such as sticky grain), the lifting angle can be finely adjusted through the control cabinet (up to 35°) to ensure that the grain is completely dumped. After the grain is dumped, the operator starts the "reset" command, the hydraulic cylinder slowly retracts, the front end of the vehicle is lowered to a horizontal state, the grain transport vehicle drives away from the load-bearing frame, and the unloading machine 1 enters the next round of unloading preparation.

[0023] As the grain falls into the input end of the chain conveyor 2, the drive motor of the chain conveyor 2 runs at a speed of 10 r / min, and the conveyor belt transports the grain towards the grain storage bin 5 at a speed of 0.8 m / s. Even if a large amount of grain is piled up at the input end (piling height ≤ 400 mm), the composite load-bearing structure of the chain plate (chain plate + conveyor belt) can withstand a grain load of ≥ 100 kg / m without the risk of deformation or breakage.

[0024] As the grain enters the sealed conveying channel and moves towards the grain storage silo 5, the dust concentration inside the silo gradually increases. When the dust concentration sensor of the dust collector 6 detects that the dust concentration inside the silo reaches 5mg / m³, it immediately sends a signal to the PLC control box. The control box triggers the centrifugal fan of the dust collector 6 to start, creating a negative pressure of -600Pa in the grain storage silo 5 and the conveying channel. At this time, the dust generated during the grain conveying process (such as broken grain particles and floating dust) is sucked into the filter cartridge of the dust collector 6 by the negative pressure. The dust particles are intercepted by the filter cartridge (filtration efficiency ≥99.9%), and the clean air is discharged by the fan. When the dust accumulation on the surface of the filter cartridge causes the negative pressure value to drop to -800Pa, the dust collector automatically starts the back-flushing cleaning function (compressed air pressure 0.5MPa) to ensure continuous and efficient filtration by the filter cartridge. The entire process is dust-free and meets the requirements of GB15577-2018 "Dust Explosion Prevention Safety Regulations".

[0025] If the unloading valve of grain storage silo 5 fails to open in time, or if high grain moisture causes grain to accumulate at the output end of the conveyor channel, the sensor will immediately send a blockage signal to the PLC control box when the grain accumulation height obstructs the signal of the infrared beam sensor. Within 0.1 seconds, the control box will cut off the power to the drive motor of the chain conveyor 2, stopping grain conveying, and will activate the alarm light (flashing frequency 1Hz) and buzzer to warn the operator. After the operator clears the blockage, pressing the reset button on the control box will restart the equipment, effectively preventing equipment overload, conveyor belt tearing, and other malfunctions caused by blockage, thus extending the equipment's service life.

[0026] 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 high-capacity receiving machine, comprising a receiving and unloading machine (1), a chain conveyor (2), and a grain storage silo (5), characterized in that: The chain plate conveyor (2) is wrapped with an annular conveyor belt on the outside of the chain plate. The conveyor belt is bolted to the chain plate. A cover (3) is provided above the chain plate conveyor (2). The cover (3) and the chain plate conveyor (2) together form a closed conveying channel. The input end of the conveying channel is horizontally set behind the output end of the unloading machine (1). The other end of the conveying channel is connected to the grain storage silo (5). The top of the cover (3) above the input end of the chain plate conveyor (2) is provided with a notch for receiving grain. A dust collector (6) is fixedly installed on the top of the grain storage silo (5). The input end of the dust collector (6) is connected to the inside of the grain storage silo (5). A blockage alarm device (4) is provided at the output end of the conveying channel.

2. The high-capacity material receiving machine according to claim 1, characterized in that: The cross-section of the cover (3) is semi-circular.

3. The high-capacity receiving machine according to claim 1, characterized in that: The dust collector (6) is an insertion type dust collector.

4. A high-capacity material receiving machine according to claim 1, characterized in that: The material blockage alarm device (4) is an infrared beam alarm.

5. A high-capacity material receiving machine according to claim 1, characterized in that: The unloading machine (1) is a hydraulic unloading machine.

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