A cleaning assembly for a cement production conveyor system

Abstract

This utility model relates to a cleaning component for a cementitious material production and conveying system, including a belt conveyor body; a multi-stage composite cleaning module installed at one end of the belt in the belt conveyor body, including a primary cleaning device, a secondary cleaning device, and a tertiary cleaning device arranged sequentially. The primary cleaning device includes a polymer elastic scraper disposed above the belt; the secondary cleaning device includes a negative pressure dust suction pipe and a rotatable brush roller, the brush roller rotating perpendicular to the belt running direction; and the tertiary cleaning device is an electrostatic adsorption device. In summary, this utility model effectively solves the cleaning and dust removal problems of existing belt conveyor systems through the organic combination and synergistic work of its components. It has significant advantages such as high cleaning efficiency, low dust pollution, high level of intelligence, and low maintenance cost, and can be widely applied to material conveying scenarios in the cementitious material production field.

Description

Technical Field

[0001] This utility model relates to the technical field of cementitious material production equipment, and in particular to a cleaning component for a cementitious material production and conveying system. Background Technology

[0002] In the production process of cementitious materials, belt conveyors are key equipment for material transfer. However, existing belt conveyor systems have significant shortcomings in terms of cleaning and dust removal, as detailed below: Traditional belt conveyors use scraper cleaners as the primary cleaning method. However, these scrapers are prone to wear after prolonged friction with the belt surface, leading to a continuous decline in cleaning effectiveness. More importantly, even when the scraper is operating normally, ≥5% of adhering powder remains on the belt surface. This residue not only spills with the belt, causing material waste, but may also accumulate on the return section, affecting the normal operation of the equipment.

[0003] Meanwhile, belt conveyors, lacking effective dust control measures, become major sources of dust accumulation. Cementitious material dust permeating the production environment continuously settles into the gaps between rotating components, forming hard clumps. This directly leads to a sharp increase in resistance during roller bearing operation, and can even cause jamming. Additionally, some belt conveyor systems use vibration cleaning to remove dust from the belt surface through mechanical vibration. However, in practice, vibration cleaning can raise large amounts of dust into the workshop air, creating serious secondary dust pollution. Cementitious material dust not only harms the health of operators but also contaminates workshop equipment. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a cleaning component for a cementitious material production and conveying system. The specific technical solution is as follows: A cleaning component for a cementitious material production and conveying system includes a belt conveyor body; a multi-stage composite cleaning module installed at one end of the belt in the belt conveyor body, comprising a primary cleaning device, a secondary cleaning device, and a tertiary cleaning device arranged sequentially; the primary cleaning device includes a polymer elastic scraper disposed above the belt at a 30-45 degree angle to the belt surface; the secondary cleaning device includes a negative pressure dust suction pipe and a rotatable brush roller, the brush roller rotating perpendicular to the belt running direction; and the tertiary cleaning device is an electrostatic adsorption device.

[0005] Preferably, it also includes a closed-loop dust removal system, which includes a cyclone separator unit, a pulse bag filter unit, a humidity regulator, and a fan. The inlet of the cyclone separator unit is connected to the negative pressure suction pipe, and the outlet is connected to the inlet of the pulse bag filter unit. The outlet of the pulse bag filter unit is connected to the inlet of the humidity regulator. The outlet of the humidity regulator returns to the main pipe between the negative pressure suction port and the cyclone separator unit through a circulation pipe. The fan is installed on the pipe between the pulse bag filter unit and the humidity regulator.

[0006] Preferably, it also includes a monitoring and cleaning unit, which includes a laser dust sensor and a high-pressure air curtain spraying device installed on the surface of the belt, and the laser dust sensor is electrically connected to the high-pressure air curtain spraying device.

[0007] Preferably, the polymer elastic scraper has a Shore hardness of 65±5, contacts the belt surface at a 45° angle and is fixed on the mounting frame one, and the closed-loop dust removal system is mounted on the mounting frame two.

[0008] Preferably, the electrostatic adsorption device operates at a voltage of 5kV, and its electrode plate is arranged parallel to the surface of the belt.

[0009] Preferably, the laser dust sensor is used to monitor the surface cleanliness of the belt in real time. When the residual amount is >50g / m², the high-pressure air curtain spraying device is triggered. The high-pressure air curtain spraying device has a working pressure of 0.6MPa and a spraying interval of 0.5s.

[0010] Preferably, a drive motor is mounted on the mounting frame via a bracket, and the output shaft of the drive motor is connected to the brush roller.

[0011] The beneficial effects of this utility model are: 1. Multi-stage cleaning synergy: The polymer elastic scraper utilizes the elastic deformation of the material to form a flexible contact with the belt surface, reducing wear while scraping off large pieces of material; the rotation of the brush roller lifts up the dust remaining on the scraper, forming a "sweeping-collecting" linkage with negative pressure suction; the electrostatic adsorption device uses Coulomb force to capture micron-sized dust, achieving full-scale cleaning from macro to micro.

[0012] 2. Closed-loop dust removal system: Through two-stage filtration of cyclone separation and bag filter, dust is efficiently separated and recovered. Humidity regulator controls air humidity to prevent dust from re-entraining. The circulating power provided by the fan eliminates the need for continuous exhaust gas emissions, making it both environmentally friendly and energy-saving.

[0013] 3. Monitoring and control: The laser dust sensor provides real-time feedback on the cleaning status, and the high-pressure air curtain spray device dynamically adjusts the cleaning intensity based on the monitoring data, forming a closed-loop control of "monitoring-feedback-execution" to ensure the stability of the cleaning effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the closed-loop dust removal system in this utility model.

[0015] Reference numerals in the attached drawings: 1. Belt conveyor body; 2. Mounting frame one; 3. Polymer elastic hanging plate; 4. Drive motor; 5. Brush roller; 6. Negative pressure dust collection pipe; 7. Electrostatic adsorption device; 8. Laser dust sensor; 9. High-pressure air curtain spray device; 10. Mounting frame two; 11. Closed-loop dust removal system; 12. Cyclone separation unit; 13. Pulse bag dust collection unit; 14. Fan; 15. Humidity regulator; 16. Circulation pipe. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] Example A cleaning component for a cementitious material production and conveying system, please refer to... Figures 1-2 This utility model provides a cleaning component for a cementitious material production and conveying system. Through the synergistic design of multi-stage composite cleaning, closed-loop dust removal, and intelligent monitoring, it achieves efficient cleaning and dust control. The specific structure is as follows: It includes a belt conveyor body 1, a multi-stage composite cleaning module, a closed-loop dust removal system 10, and a monitoring and cleaning unit. Each module is fixed to the conveyor frame by a mounting bracket to form an integrated cleaning system.

[0018] A multi-stage composite cleaning module is installed at one end of the belt in the belt conveyor body 1, with three cleaning devices arranged sequentially along the belt running direction: The primary cleaning device includes a polymer elastic scraper mounted above the belt and bolted to the mounting bracket 2. The scraper is made of polyurethane material with a Shore hardness of 65±5 and contacts the belt surface at a 45° angle. This angle allows for an optimal balance between the normal pressure and tangential friction of the scraper on the belt, effectively removing adhering materials while reducing the scraper's wear rate.

[0019] The secondary cleaning device consists of a negative pressure suction pipe 5 and a brush roller 4. The brush roller 4 is perpendicular to the belt running direction and is mounted on the mounting frame 2 via a bearing seat. One end of the brush roller 4 is connected to the output shaft of the drive motor 4 (the drive motor 4 is fixed to the mounting frame 2 via a bracket). The brush is made of nylon filaments with a diameter of 0.5 mm and the rotation speed is controlled at 120-150 r / min, which can brush up the fine dust remaining on the scraper. The negative pressure suction pipe 5 is located below the brush roller 4, with an opening 5-8 mm away from the belt surface. It is connected to the inlet of the cyclone separation unit 101 of the closed-loop dust removal system 10 through the pipe, forming a local negative pressure field (negative pressure value -500 Pa to -800 Pa) to achieve immediate dust collection.

[0020] The third-level cleaning device is an electrostatic adsorption device 6, whose electrode plates are set parallel to the belt surface with a spacing of 10-15mm and an operating voltage of 5kV. The electrode plates are fixed to the mounting bracket 2 by an insulating support, which can generate an electrostatic field with an intensity of 2000-3000V / m, causing the electrostatically charged dust (most of the dust from cementitious materials is negatively charged) remaining on the belt surface to be adsorbed onto the electrode plates, achieving deep cleaning of submicron-level dust.

[0021] The closed-loop dust removal system 10 is installed on the mounting bracket 2 9 and includes a cyclone separator unit 101, a pulse bag filter unit 102, a humidity regulator 14, and a fan 13 connected in sequence. The inlet of the cyclone separation unit 101 is connected to the negative pressure dust suction pipe 5. It uses centrifugal force to separate dust particles with a diameter ≥10μm, and the coarse dust is discharged through the bottom discharge port.

[0022] The outlet of the cyclone separator 101 is connected to the inlet of the pulse bag filter unit 102. The filter bag uses PTFE membrane filter material with a filtration accuracy of 0.3μm. The purified air enters the humidity regulator 14.

[0023] The humidity regulator 14 has a built-in electric heating element and a steam spray device, which can regulate the air humidity to 40%-60%RH to prevent dry air from causing dust to fly again.

[0024] The fan 13 is installed on the duct between the pulse bag dust collector unit 102 and the humidity regulator 14 (air pressure 2000-2500Pa) to provide power to the system. The purified air returns to the main duct between the negative pressure dust suction port and the cyclone separator unit 101 through the circulation duct, forming a closed loop. Compared with the traditional open dust collection system, the dust emission concentration is reduced by more than 95%, and the energy consumption is reduced by 30%.

[0025] The monitoring and cleaning unit includes a laser dust sensor 7 and a high-pressure air curtain spray device 8, which are installed 20-30mm above the belt surface and are electrically connected by a cable. The laser dust sensor 7, model LDV-500, can monitor the amount of dust residue on the belt surface in real time with a measurement accuracy of ±5g / m². When the residue exceeds 50g / m², the sensor triggers the high-pressure air curtain spray device 8. This device operates at a pressure of 0.6MPa with a spray interval of 0.5s. The compressed air sprayed forms an air curtain with a width of 50mm, performing pulse-style cleaning on the belt surface and achieving intelligent control of the cleaning process.

[0026] Specifically, the electrostatic adsorption device can use the JD-5K electrostatic precipitator, which operates at 5kV and adopts a parallel electrode plate structure. It is suitable for adsorbing submicron-level dust and is commonly used in industrial belt cleaning scenarios. The electrode plate spacing can be adjusted to 10-15mm.

[0027] The high-pressure air curtain injection device 8 adopts the existing SUS-06 high-pressure air curtain nozzle, with a working pressure of 0.6MPa, an injection interval that can be set to 0.5s, and a pulse injection design, with an airflow width of approximately 50mm. The existing technical model of the cyclone separation unit 101 is the XLP-B type cyclone separator, which has a separation efficiency of ≥90% for dust particles with a diameter ≥10μm. It adopts a volute-type air intake structure, resulting in low resistance loss. The existing technical model of the pulse bag dust collector unit 102 is the DMC-64 pulse bag dust collector, which has a filtration accuracy of ≤0.3μm, a dust removal efficiency of ≥99.9%, uses PTFE membrane filter media, and has a pulse cleaning pressure of 0.4-0.6MPa, which is suitable for the fine filtration requirements of the closed-loop dust collection system 10.

[0028] The above models are derived from the technical parameters (such as voltage, pressure, filtration accuracy, etc.) and functional descriptions of this device, combined with common product types in the industrial field. In actual applications, the specific model selection needs to be further adapted according to the on-site operating conditions (such as air volume, dust concentration, etc.).

[0029] Workflow: When the belt conveyor is running, the drive motor 4 drives the brush roller 5 to rotate at a speed of 130 r / min. The polymer elastic scraper 3 of the primary cleaning device first scrapes off most of the material on the surface of the belt, and the remaining fine dust is brushed up by the brush roller.

[0030] Meanwhile, the negative pressure suction pipe 6 generates a negative pressure of -600Pa under the action of the fan 103, which sucks the dust brushed up into the closed-loop dust removal system: the dust is first separated into coarse particles by the cyclone separation unit 101, and then enters the pulse bag dust removal unit 102 for fine filtration. The purified air is humidified by the humidity regulator 104 and then sent back to the system for recycling by the fan.

[0031] The belt continues to run to the third-level cleaning device, where the electrostatic adsorption device 7 generates an electrostatic field that adsorbs the remaining submicron dust, ensuring the cleanliness of the belt surface.

[0032] The laser dust sensor 8 monitors the belt surface in real time. When the residual amount is detected to be >50g / m² (such as when the cleaning effect decreases due to changes in material humidity), it immediately sends a signal to the high-pressure air curtain spray device 9. The device sprays compressed air at a pressure of 0.6MPa and an interval of 0.5s to clean the belt until the residual amount drops below the threshold.

[0033] This application of the cleaning component on a Φ1000mm belt conveyor in a cement production line yielded the following test data: The residual amount on the belt surface decreased from 6.2% before the modification to 0.3%, saving approximately 1200 tons of cement annually. The dust concentration in the workshop decreased from 45mg / m³ to 4.2mg / m³, meeting national standards. The operating temperature of the roller bearings decreased by 15-20℃, and there were no further instances of jamming, resulting in annual savings of 85,000 yuan in equipment maintenance costs.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cleaning component for a cementitious material production and conveying system, characterized in that, include: Belt conveyor body; A multi-stage composite cleaning module is installed at one end of the belt in the belt conveyor body. It includes a primary cleaning device, a secondary cleaning device, and a tertiary cleaning device arranged in sequence. The primary cleaning device includes a polymer elastic scraper installed above the belt at a 30-45 degree angle to the belt surface. The secondary cleaning device includes a negative pressure dust suction pipe and a rotatable brush roller. The brush roller rotates perpendicular to the belt running direction. The tertiary cleaning device is an electrostatic adsorption device.

2. The cleaning component for a cementitious material production and conveying system according to claim 1, characterized in that: It also includes a closed-loop dust removal system, which includes a cyclone separator unit, a pulse bag filter unit, a humidity regulator, and a fan. The inlet of the cyclone separator unit is connected to the negative pressure suction pipe, and the outlet is connected to the inlet of the pulse bag filter unit. The outlet of the pulse bag filter unit is connected to the inlet of the humidity regulator. The outlet of the humidity regulator returns to the main pipe between the negative pressure suction port and the cyclone separator unit through a circulation pipe. The fan is installed on the pipe between the pulse bag filter unit and the humidity regulator.

3. A cleaning component for a cementitious material production and conveying system according to claim 2, characterized in that: It also includes a monitoring and cleaning unit, which includes a laser dust sensor and a high-pressure air curtain spraying device installed on the surface of the belt. The laser dust sensor is electrically connected to the high-pressure air curtain spraying device.

4. A cleaning component for a cementitious material production and conveying system according to claim 3, characterized in that: The polymer elastic scraper has a Shore hardness of 65±5, contacts the belt surface at a 45° angle and is fixed on mounting frame one, and the closed-loop dust removal system is installed on mounting frame two.

5. A cleaning component for a cementitious material production and conveying system according to claim 4, characterized in that: The electrostatic adsorption device includes an electrode plate with a working voltage of 5kV, and the electrode plate is arranged parallel to the surface of the belt.

6. A cleaning component for a cementitious material production and conveying system according to claim 5, characterized in that: The laser dust sensor is used to monitor the surface cleanliness of the belt in real time. When the residual amount is >50g / m², the high-pressure air curtain spraying device is triggered. The high-pressure air curtain spraying device has a working pressure of 0.6MPa and a spraying interval of 0.5s.

7. A cleaning component for a cementitious material production and conveying system according to claim 6, characterized in that: A drive motor is mounted on the mounting frame via a bracket, and the output shaft of the drive motor is connected to the brush roller.

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