A pneumatic separation and recovery system for adhesive materials stuck to belts

Abstract

This utility model relates to a pneumatic separation and recovery system for adhesive material on a belt conveyor, comprising: a volute blower for providing an air source, the volute blower being disposed on one side of the belt; an air knife assembly fixedly installed at the air outlet of the volute blower, the air knife assembly being used to form air knives from the gas ejected by the volute blower, the air knife assembly being located above the belt; and a recovery device located above the belt, the recovery module being used to recover the material cut by the air knife and to filter the material, the air outlet of the recovery device being connected to the air inlet of the volute blower.

Description

Technical Field

[0001] This utility model relates to a pneumatic separation structure, specifically to a pneumatic separation and recovery system for material adhering to a belt. Background Technology

[0002] In modern continuous production systems, belt conveyors handle over 80% of bulk material transportation. However, material residue remains a persistent problem in the industry. Statistics show that...

[0003] In the cement industry, the annual residual amount per kilometer of conveyor belt reaches 2-3 tons.

[0004] Cross-contamination incidents caused by material residues account for 12% of food processing plant accidents.

[0005] Chemical companies suffer economic losses exceeding 0.5% of their output value annually due to powder spillage.

[0006] High safety risks: Personnel need to enter the belt rotation area, which can easily lead to accidents such as entanglement and crushing;

[0007] High labor intensity: High frequency and repetitive work leads to worker fatigue and low cleaning efficiency (it takes 30-60 minutes to clean a single belt).

[0008] Material waste is serious: residual materials fall directly to the ground, and the recovery rate is less than 30%, which causes economic losses, especially for high-value powder and granular materials.

[0009] Incomplete cleaning: Manual tools (such as scrapers) can easily damage the surface of the belt and are difficult to remove material stuck in gaps and grooves.

[0010] Existing automated cleaning technologies, such as mechanical scrapers and brush cleaning, suffer from problems such as rapid equipment wear, high noise levels, and the need for regular parts replacement. Traditional air knife cleaning devices only blow away materials without integrating a recovery system, leading to secondary pollution and material loss. The applicant has found that existing technologies lack an intelligent cleaning system that integrates "separation-recovery-circulation," and there is room for improvement, especially in key technologies such as negative pressure control, air knife airflow distribution, and filtration and recovery efficiency. Utility Model Content

[0011] The main purpose of this utility model is to provide a pneumatic separation and recycling system for conveyor belts that uses the synergistic effect of precise air knife purging and negative pressure recovery to achieve efficient separation and recycling of residual materials, replacing high-risk manual operations, reducing labor intensity, and meeting the clean production standards of the manufacturing industry.

[0012] To achieve the above objectives, this utility model provides a pneumatic separation and recovery system for adhesive materials stuck to belts, comprising:

[0013] The volute fan is used to provide an air source and is located on one side of the belt.

[0014] Air knife assembly, the air knife assembly is fixedly installed at the air outlet end of the volute blower. The air knife assembly is used to form an air knife by spraying the gas ejected by the volute blower. The air knife assembly is located above the belt.

[0015] The recycling device is located above the belt. The recycling module is used to recover the material after air knife cutting and to filter the material. The air outlet of the recycling device is connected to the air inlet of the volute blower.

[0016] Preferably, the air knife assembly includes an air outlet set at an angle of 15°-30° to the surface of the belt. The air outlet has a slit-type structure, and its height and angle can be adjusted by an adjustable bracket.

[0017] More preferably, the adjustable bracket includes a height adjustment mechanism, an angle adjustment mechanism, and a lateral sliding mechanism, wherein,

[0018] The height adjustment mechanism uses a worm gear drive and is used to adjust the height of the air outlet.

[0019] The angle adjustment mechanism adopts a gear and rack structure and is used to adjust the angle of the air outlet.

[0020] The lateral sliding mechanism uses linear guides and is used for belt misalignment compensation.

[0021] In a further preferred embodiment, the air knife assembly has an airflow homogenization chamber inside the blade body, the length of which is 1 / 3 to 1 / 2 of the blade body length, and guide vanes are provided on the inner wall of the chamber, so that the airflow uniformity is ≥90%.

[0022] Preferably, the recycling device includes a filter box, a pulse backflushing device at the top of the filter box, a screw conveyor at the inlet end of the filter box, a return pipe at the bottom of the filter box, an outlet end of the return pipe located above the belt, the top of the filter box being connected to the inlet end of the volute blower, and a three-stage filtration structure inside the filter box.

[0023] In a further preferred embodiment, the three-stage filtration structure consists of a coarse filter screen, a medium-efficiency filter bag, and a high-efficiency filter element, from the inside out.

[0024] Even more preferably, a vibration motor is installed on the outside of the filter box.

[0025] In a further preferred embodiment, the pneumatic separation and recovery system also includes a PLC controller, a pressure sensor, and a speed detector. The pressure sensor is used to measure the pressure difference of the gas before and after filtration in the filter chamber, the speed detector is used to detect the running speed of the belt, and the PLC controller adjusts the frequency converter of the volute fan according to the signal strength of the pressure sensor.

[0026] The beneficial effects of this utility model are as follows:

[0027] This invention utilizes the negative pressure generated by a turbine fan and a filter housing to draw materials into a three-stage filter housing, achieving efficient recovery and recycling of the separated materials. The system integrates intelligent control and safety protection, replacing high-risk manual labor, reducing labor intensity by over 90%, and achieving a cleaning and recycling efficiency of over 98%, providing an intelligent solution for clean production in the manufacturing industry.

[0028] It is evident that by applying this invention, the frequency of manual intervention is significantly reduced, thereby reducing labor intensity.

[0029] The amount of material recovered is significantly increased compared to the original manual cleaning, saving production costs.

[0030] The surface cleanliness of the belt has been significantly improved, and the frequency of equipment failures caused by material adhesion in subsequent processes has decreased significantly. Attached Figure Description

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] Figure 1 This is a schematic diagram of the pneumatic separation and recovery system of this utility model.

[0033] Explanation of reference numerals in the attached figures

[0034] 1. Scroll fan; 11. Frequency converter; 12. Air outlet; 13. Air inlet;

[0035] 2. Air knife assembly; 21. Knife body; 22. Airflow homogenization chamber; 221. Guide vanes;

[0036] 23. Adjustable stand;

[0037] 231. Height adjustment mechanism; 232. Angle adjustment mechanism; 233. Lateral sliding mechanism;

[0038] 3. Filter housing;

[0039] 31. Coarse filter screen; 32. Medium-efficiency filter bag; 33. High-efficiency filter element; 331. Antistatic coating;

[0040] 34. Screw conveyor;

[0041] 35. Return pipe; 36. Pulse backflushing device; 37. Vibration motor;

[0042] 4. Control system; 41. Pressure sensor; 43. Speed ​​detector. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. Example 1

[0044] like Figure 1 As shown, this embodiment provides a pneumatic separation and recovery system for conveyor belt adhesive materials, including a volute blower 1, an air knife assembly 2, and a recovery device. The volute blower 1 is controlled by a frequency converter 11, which provides the air source. The volute blower 1 is located on one side of the conveyor belt. Preferably, the impeller of the volute blower 1 uses backward-curved blades, with an impeller diameter of 300-500mm, 8-12 blades, and a blower efficiency ≥85%.

[0045] The air knife assembly 2 is fixedly installed at the air outlet 12 of the volute blower 1. The air knife assembly 2 is used to form an air knife by spraying the gas ejected by the volute blower 1. The air knife assembly 2 is located above the belt. Specifically, the air knife assembly 2 includes an air outlet set at an angle of 15°-30° with the belt surface. The air outlet has a slit structure. Preferably, the slit width is 0.5-1mm, and the height and angle of the air outlet can be adjusted by an adjustable bracket 23. Preferably, the height is adjustable from 5-15cm and the angle is adjustable by ±15°.

[0046] Preferably, the adjustable bracket 23 includes a height adjustment mechanism 231, an angle adjustment mechanism 232, and a lateral sliding mechanism 233. The height adjustment mechanism 231 adopts a worm gear transmission with an adjustment accuracy of 0.1cm and is used to adjust the height of the air outlet. The angle adjustment mechanism 232 adopts a gear and rack structure with an adjustment accuracy of 1° and is used to adjust the angle of the air outlet. The lateral sliding mechanism 233 adopts a linear guide rail with a sliding stroke of ±5cm and is used for belt misalignment compensation.

[0047] The air knife assembly 2 has an airflow homogenization chamber 22 inside the blade body 21. The length of the homogenization chamber is 1 / 3 to 1 / 2 of the length of the blade body 21. The inner wall of the chamber is provided with guide vanes 221, which make the airflow uniformity ≥90%.

[0048] The recycling device is located above the belt. The recycling module is used to recycle the material after air knife cutting and to filter the material. The air outlet of the recycling device is connected to the air inlet of the volute blower 1.

[0049] Specifically, the recycling device includes a filter housing 3, with a pulse backflushing device 36 at the top. Preferably, the backflushing air pressure is 0.4-0.6 MPa. The pulse backflushing device 36 can also create negative pressure at the inlet of the filter housing 3. A screw conveyor 34 is located at the inlet end of the filter housing 3, and a return pipe 35 is located at the bottom of the filter housing 3. The outlet end of the return pipe 35 is located above the belt conveyor. The top of the filter housing 3 is connected to the air inlet 13 of the volute blower 1. The filter housing 3 contains a three-stage filtration structure.

[0050] Preferably, the three-stage filtration structure consists of a coarse filter screen 31, a medium-efficiency filter bag 32, and a high-efficiency filter element 33, from the inside out. Their respective filtration ...

[0051] In this embodiment, a vibration motor 37 is provided on the outside of the filter box 3 to assist in unloading.

[0052] The pneumatic separation and recovery system control system 4 includes a PLC controller, a pressure sensor 41, and a speed detector 43. The pressure sensor 41 is used to measure the pressure difference of the gas before and after filtration in the filter housing 3. The speed detector 43 is used to detect the running speed of the belt. The PLC controller adjusts the frequency converter 11 of the volute fan 1 according to the signal strength of the pressure sensor 41. Example 2

[0053] This embodiment works based on and depends on Embodiment 1. Specifically, the device parameters are as follows:

[0054] Belt width: 1200mm, running speed: 2m / s, material particle size: 10-50μm, adhesion force: 3N / m²;

[0055] Scroll fan 1: Power 7.5kW, rated negative pressure -20kPa, air volume 2000m³ / h;

[0056] Air knife: blade body 21, length 1300mm, slit width 0.8mm, blowing angle 25°, distance from belt surface 10cm;

[0057] Filter box 3: First-stage coarse filter screen 3150 mesh (retains particles ≥300μm), second-stage filter bag 100 mesh (retains particles ≥100μm), third-stage electrostatic filter element 200 mesh (retains particles ≥20μm), backflushing air pressure 0.5MPa, cycle 8 minutes.

[0058] Operation process:

[0059] After the belt starts, the speed detector 43 sends a signal to the PLC controller to calculate the air knife purging frequency, and the frequency converter 11 adjusts the fan to 40Hz (corresponding to an air volume of 1600m³ / h).

[0060] The air curtain ejected by the air knife sweeps across the belt surface at a speed of 180 m / s. The calcium carbonate powder is peeled off under the action of shear force (calculated value 5.2 N / m² > adhesion force 3 N / m²) and enters the filter box 3 with the airflow.

[0061] The coarse filter 31 traps larger particles (such as agglomerated materials), the medium-efficiency filter bag 32 captures the main material particles, and the high-efficiency filter element 33 adsorbs fine dust. The purified air is discharged into the workshop by a fan (dust concentration ≤10mg / m³, in compliance with GBZ2.1 standard).

[0062] When the pressure sensor 41 detects that the filter pressure difference reaches 6 kPa, the PLC controller triggers the pulse backflushing device 36, and the compressed air backflushes the filter bag for 3 seconds. The detached material falls into the screw conveyor 34 and is conveyed to the belt through the return pipe 35. The actual recovery rate is 98.7%.

[0063] For cleaning granular materials (taking 2-5mm diameter plastic granules as an example), the air knife slit width is increased to 1.2mm, the blowing angle is adjusted to 15° (to reduce airflow diffusion), and the distance from the belt surface is 8cm (to enhance impact force).

[0064] The primary filter screen of the filter box 3 is replaced with a 20-mesh screen (suitable for large particles), the tertiary filter element is removed, and a vibration motor 37 is added to assist in unloading (vibration frequency 50Hz, amplitude 2mm).

[0065] The beneficial effects of this embodiment:

[0066] The frequency of manual intervention was reduced from 4 times per shift to 0.5 times, resulting in a 92% reduction in labor intensity;

[0067] The material recovery rate has increased from 30 kg / shift to 295 kg / shift (recovery rate 98.3%), saving approximately 850,000 yuan in costs annually (based on a material price of 15 yuan / kg and 300 operating days per year).

[0068] The surface cleanliness of the belt reached 99.2%, and the frequency of equipment failures caused by material adhesion in subsequent processes decreased by 75%.

[0069] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A pneumatic separation and recovery system for belt adhesive, characterized by, include: A volute fan, which provides an air source, is disposed on one side of the belt; An air knife assembly is fixedly installed at the air outlet end of the volute blower. The air knife assembly is used to form an air knife by spraying the gas ejected by the volute blower. The air knife assembly is located above the belt. A recycling device is located above the belt. The recycling module is used to recycle the material after air knife cutting and to filter the material. The air outlet of the recycling device is connected to the air inlet of the volute blower.

2. A system for pneumatically separating and recovering belt adhesive material according to claim 1, wherein The air knife assembly includes an air outlet set at an angle of 15°-30° to the surface of the belt. The air outlet has a slit structure, and its height and angle can be adjusted by an adjustable bracket.

3. A system for pneumatically separating and recovering adhesive from a belt as defined in claim 2, wherein The adjustable bracket includes a height adjustment mechanism, an angle adjustment mechanism, and a lateral sliding mechanism, wherein... The height adjustment mechanism adopts a worm gear transmission and is used to adjust the height of the air outlet. The angle adjustment mechanism adopts a gear and rack structure, and the angle adjustment mechanism is used to adjust the angle of the air outlet. The lateral sliding mechanism uses a linear guide rail and is used for belt misalignment compensation.

4. A system according to claim 2, wherein, The air knife assembly has an airflow homogenization chamber inside the blade body. The length of the homogenization chamber is 1 / 3 to 1 / 2 of the blade body length. The inner wall of the chamber is provided with guide vanes, which make the airflow uniformity ≥90%.

5. The pneumatic separation and recovery system for adhesive materials on a belt according to claim 1, characterized in that, The recycling device includes a filter box, a pulse backflushing device at the top of the filter box, a screw conveyor at the inlet end of the filter box, a return pipe at the bottom of the filter box, an outlet end of the return pipe located above the belt, the top of the filter box being connected to the inlet end of the volute blower, and a three-stage filtration structure inside the filter box.

6. A system for pneumatically separating and recovering belt adhesive material according to claim 5, wherein The three-stage filtration structure consists of a coarse filter screen, a medium-efficiency filter bag, and a high-efficiency filter element, from the inside out.

7. A system for pneumatically separating and recovering adhesive from a belt as defined in claim 6, wherein The filter housing is equipped with a vibration motor on its exterior.

8. A belt-bonding pneumatic separation and recovery system according to claim 5, characterized in that, The pneumatic separation and recovery system also includes a PLC controller, a pressure sensor, and a speed detector. The pressure sensor is used to measure the pressure difference of the gas before and after filtration in the filter box. The speed detector is used to detect the running speed of the belt. The PLC controller adjusts the frequency converter of the volute fan according to the signal strength of the pressure sensor.

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