Unpowered dust remover for conveying belt and dust removal method

Abstract

The unpowered dust remover comprises a rack, the conveying belt, a material guide groove, supporting rollers and a coal falling pipe, and the rack is further provided with a dust removing chamber, a dust filtering chamber, a sealing skirt edge, a clamping device and a discharging baffle curtain; a sealing top is arranged at the top of the material guide groove, a sealing box is arranged on the outer side of the material guide groove at the starting end, the dust removal chamber comprises a dust removal feeding pipe, a dust removal discharging pipe and a circular-arc-shaped bent pipe, and the included angle between the dust removal feeding pipe and the dust removal discharging pipe is 30-35 degrees; the dust filtering chamber comprises an inverted-V-shaped pipe body, the included angle of the inverted-V-shaped pipe body is 60 degrees, the dust removal feeding pipe and the inverted-V-shaped pipe body are each provided with a communicating hole and a filter screen plate, and flow guide plates are arranged in the dust removal chamber and the dust filtering chamber; the device can effectively control dust escape, reduce pollution to the environment, prolong the service life of a conveying belt, reduce the operation cost of an enterprise and achieve the final purpose of reducing material dust pollution, and has the characteristics of small occupied area, low investment, low power consumption, less maintenance, no need of manual work, no secondary pollution and the like.

Description

Technical Field

[0001] The invention relates to the technical field of dust removal devices, and in particular to an unpowered dust collector for a conveyor belt and a dust removal method. Background Art

[0002] Unpowered dust removal technology is an efficient dust removal device, suitable for the drop port of belt conveyor, transfer station of belt conveyor, etc. Unpowered dust collector belongs to dry dust removal process, which is mainly used in conveying transfer station, especially in the crushing bin with a large amount of dust in the coal conveying system. At present, the coal dust pollution of the conveyor belt is caused by the dust brought up by the impact airflow when the upper material falls, which spreads into the surrounding environment. Under the action of the impact flow, part of the rolled up fine dust spreads and drifts in the surrounding atmosphere due to the escape force, which has a certain impact on the working environment. Summary of the invention

[0003] In order to solve one or some technical problems existing in the prior art, one of the purposes of this application is to provide a conveyor belt unpowered dust collector, which can effectively control the escape of dust, reduce pollution to the environment, extend the service life of the conveyor belt, reduce the operating costs of the enterprise, and achieve the ultimate goal of reducing material dust pollution. It has the characteristics of small footprint, small investment, low power consumption, less maintenance, no need for human work, and no secondary pollution.

[0004] In order to solve one or some technical problems existing in the prior art, the second purpose of the present application is to provide a conveyor belt unpowered dust removal method, which is simple to operate and has good dust removal effect.

[0005] In order to solve the above existing technical problems, one of the purposes of this application is achieved by adopting the following technical solution:

[0006] A conveyor belt unpowered dust collector comprises a frame, a conveyor belt arranged on the frame, a plurality of guide troughs arranged on the frame, a support roller arranged at the bottom of the conveyor belt, and a coal drop pipe connected to the starting end of the guide trough, wherein the material on the upper conveyor belt falls to the end of the conveyor belt through the coal drop pipe and is transported forward, and the conveyed material on both sides of the conveyor belt is limited by the guide trough, and is characterized in that: a dust removal chamber, a dust filter chamber, a sealing skirt and a clamping device are also provided on the frame;

[0007] The top of the guide trough is provided with a sealing cap, the outside of the guide trough at the starting end is provided with a sealing box, and the bottom of the guide trough is arranged above the conveyor belt to guide the material and control the diffusion of dust;

[0008] The sealing skirt is installed on both sides of the material guide trough along the conveying belt through the clamping device, and a sealing structure is formed between the conveying belt and the material guide trough through the sealing skirt;

[0009] The discharge port of the frontmost section of the guide trough is provided with a discharge curtain, and the multiple sections of the guide troughs connected in series form a fully enclosed feeding cavity through the sealing cap, the sealing box, the sealing skirt and the discharge curtain.

[0010] The dust removal chamber comprises a dust removal feed pipe vertically arranged at the top of the sealing cap, a dust removal discharge pipe obliquely arranged at the top of the sealing cap, and an arc-shaped elbow pipe arranged between the dust removal feed pipe and the dust removal discharge pipe, and the angle between the dust removal feed pipe and the dust removal discharge pipe is 30-35°; the dust removal chamber is arranged downstream of the coal drop pipe and is connected to the guide trough, and is used to capture and separate dust in the dust-laden airflow;

[0011] The dust filter chamber comprises an inverted V-shaped tube body whose two ends are connected to the top of the sealing cap, the angle of the inverted V-shaped tube body is 60°, the dust removal feed pipe and the inverted V-shaped tube body are both provided with a connecting hole and a filter screen plate, and the dust removal chamber and the dust filter chamber are both provided with a guide plate;

[0012] The dust filter chamber is arranged downstream of the dust removal chamber and is connected through the material guide trough for further filtering and purifying the dust-laden airflow.

[0013] Preferably, a plurality of adjustable damping dust-blocking curtains are provided in the material guiding chute, and different material characteristics and dust amounts can be accommodated by increasing the number of the damping dust-blocking curtains.

[0014] Preferably, the sealing skirt includes a rectangular sealing plate and a support plate obliquely arranged on the outside of the sealing plate, the sealing plate and the support plate are combined to form a "human" structure, the inner side of the lower end of the support plate is provided with a reinforcing rib with an arc-shaped protrusion, and the sealing skirt is made of a wear-resistant rubber plate.

[0015] Preferably, the clamping device includes a fixed seat arranged on the side wall of the material guide trough, an L-shaped pressure rod arranged on the fixed seat, and an angle iron bar arranged on the L-shaped pressure rod, the fixed seat is provided with a T-shaped mounting groove, the L-shaped pressure rod is fixed to the T-shaped mounting groove by bolts, the lower end of the L-shaped pressure rod is provided with a V-shaped limiting groove, the angle iron bar is positioned and clamped by the V-shaped limiting groove, and one side of the sealing plate is clamped to the side wall of the material guide trough by the angle iron bar.

[0016] Preferably, an inclined guide roller is respectively provided on both sides of the support roller, and the two sides of the conveyor belt and the sealing skirt are intermittently transitioned upward and pressed by the guide roller.

[0017] Preferably, the side surface and the bottom surface of the material guide trough form an inverted "eight"-shaped structure, and the sealing cap on the material guide trough adopts an arc top structure.

[0018] Preferably, the guide plate includes a guide plate whose top is fixed in the dust removal feed pipe and a plurality of guide vanes arranged below the guide plate. The guide vanes and the bottom of the guide plate are both arranged with arc-shaped structures. The guide plate is fitted with the arc-shaped top of the material guide trough through the guide plate, and the guide plate is fitted with conveyed materials in different areas through the guide vanes.

[0019] Preferably, the coal dropping pipe extends into the material guiding trough, and a shock absorbing device is provided at the bottom of the connection between the coal dropping pipe and the material guiding trough, so that the material falling onto the conveyor belt through the coal dropping pipe is buffered by the shock absorbing device at the bottom.

[0020] Preferably, the shock absorbing device includes a plurality of rubber buffer blocks arranged on the frame and a base for fixing the rubber buffer blocks, the rubber buffer blocks are detachably mounted on the base, and the height and tilt angle of the rubber buffer blocks are adjusted by the base.

[0021] Preferably, the coal drop pipe is a curved structure to reduce the impact and dust generation when the material falls.

[0022] Preferably, an openable and closable observation and maintenance window is provided on the outer side of the connecting hole to facilitate observation and maintenance.

[0023] The second purpose of this application is achieved by the following technical solution:

[0024] A method for unpowered dust removal of a conveyor belt, the method comprising:

[0025] S1. The material falls into the guide chute through the curved coal drop pipe, and moves forward along the conveyor belt after being buffered by the shock absorbing device;

[0026] S2. The impact airflow generated by the falling material is guided by the guide plate and then enters the dust removal chamber for slow flow and dust reduction. At the same time, part of the gas is filtered by the filter plate and then discharged outward along the connecting hole;

[0027] S3, the airflow after passing through the dust removal chamber is blocked and rebounded by multiple damping dust curtains in the guide trough;

[0028] S4, the airflow after being buffered by the dust removal chamber and multiple damping dust curtains enters the dust filter chamber through the guide plate for secondary separation and filtration. At the same time, part of the gas is filtered by the filter screen on the dust filter chamber and then discharged outward along the connecting hole;

[0029] S5. The dust and airflow after passing through the dust filter chamber are blocked by multiple damping dust curtains, and then discharged outward after being blocked by the heaviest discharge curtain at the outlet end.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] It does not require external power supply. It uses aerodynamic principles to complete air damping, circulating pressure relief and dust collection in the guide chute. This design not only saves energy, but also reduces operating costs, while achieving good dust removal effects.

[0032] The existing traditional dust removal technology has been improved and optimized in many aspects. First of all, the biggest advantage of the unpowered dust collector is its energy-saving and environmentally friendly characteristics. It does not rely on any external energy input to operate, which is in sharp contrast to traditional technologies such as electric dust removal and bag dust removal that require electric drive. This energy-free operation not only reduces energy consumption, but also reduces the environmental impact caused by energy use.

[0033] The design of the unpowered dust collector adopts the principle of aerodynamics, using the impact airflow generated when the material falls as the power, and effectively separates and removes the dust-laden air through inertia, gravity sedimentation, filtration, etc. through the airflow channel and internal structure. This design not only improves the dust removal efficiency, but also avoids the secondary pollution problem that may occur in traditional dust removal technology.

[0034] The structural design of the unpowered dust collector is simple and efficient, and it is easy to install and maintain. Its maintenance cost is low because it does not involve complex mechanical parts or electrical systems, thus reducing the failure rate and repair work. This simplicity also makes the installation process of the unpowered dust collector faster, which helps to shorten the engineering cycle and speed up the project progress.

[0035] The high dust removal efficiency of the unpowered dust collector is another significant advantage. By combining multiple dust removal technologies, the unpowered dust collector can achieve a dust removal efficiency of more than 99%, significantly reducing dust emissions in industrial production processes, improving the working environment, and helping companies meet increasingly stringent environmental regulations.

[0036] In practical applications, by improving the sealing of the material guide chute, the escape of dust is effectively controlled, reducing the pollution to the surrounding environment. At the same time, it can also reduce the impact of materials on the conveyor belt, extend the service life of the conveyor belt, and thus reduce the operating costs of the enterprise.

[0037] As dust is effectively controlled, the air quality in the work area is improved, providing a healthier and safer working environment for workers. This not only helps to improve employee job satisfaction, but also meets the requirements of modern industry for workplace health and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0039] Figure 2It is a schematic diagram of the combined structure of the clamping device and the sealing skirt in the present invention;

[0040] Figure 3 It is a front view of the combined structure of the frame, conveyor belt, material guide trough, clamping device, sealing skirt, guide roller and support roller in the present invention;

[0041] Figure 4 A side view of the dust removal chamber and guide plate installation structure of the present invention;

[0042] Figure 5 It is a front view of the dust removal chamber and guide plate installation structure of the present invention;

[0043] Figure 6 A side view of the dust filter chamber and guide plate installation structure of the present invention;

[0044] Figure 7 It is a front view of the dust filter chamber and guide plate installation structure of the present invention;

[0045] Figure 8 It is a front view of the combined structure of the frame, conveyor belt, coal drop pipe, material guide chute, clamping device, sealing skirt and shock absorbing device in the present invention;

[0046] In the figure: 1. conveyor belt; 2. frame; 3. sealing box; 4. coal drop pipe; 5. dust removal chamber; 6. sealing cap; 7. guide trough; 8. damping dust curtain; 9. clamping device; 10. sealing skirt; 11. dust filter chamber; 12. discharge curtain; 13. guide roller; 14. support roller; 15. support plate; 16. reinforcing rib; 17. sealing plate; 18. fixing seat; 19. T-shaped mounting groove; 20. L-shaped pressure rod; 21. angle iron bar; 22. V-shaped limit groove; 23. dust removal feed pipe; 24. connecting hole; 25. observation and maintenance window; 26. filter screen; 27. arc-shaped elbow; 28. dust removal discharge pipe; 29. ​​inverted V-shaped pipe body; 30. guide plate; 31. guide plate; 32. guide plate; 33. shock absorbing device; 34. rubber buffer block; 35. base;. DETAILED DESCRIPTION

[0047] Below, the present application is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0048] In the description of the present application, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0049] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0050] Embodiment 1:

[0051] like Figure 1 , 4 As shown in Figures 1 to 7, a conveyor belt unpowered dust collector comprises a frame 2, a conveyor belt 1 arranged on the frame 2, a plurality of guide troughs 7 arranged on the frame 2, a support roller 14 arranged at the bottom of the conveyor belt 1, and a coal drop pipe 4 connected to the starting end of the guide trough 7. The material on the upper conveyor belt falls to the end of the conveyor belt 1 through the coal drop pipe 4 and is transported forward. The conveyed material on both sides of the conveyor belt 1 is limited by the guide trough 7. The frame 2 is also provided with a dust removal chamber 5, a dust filter chamber 11, a sealing skirt 10 and a clamping device 9.

[0052] The top of the guide trough 7 is provided with a sealing cap 6, the outside of the guide trough 7 at the starting end is provided with a sealing box 3, and the bottom of the guide trough 7 is arranged above the conveyor belt 1, which is used to guide the material and control the diffusion of dust;

[0053] The sealing skirt 10 is installed on both sides of the material guide trough 7 along the conveying belt 1 through the clamping device 9, and a sealing structure is formed between the conveying belt 1 and the material guide trough 7 through the sealing skirt 10;

[0054] The discharge port of the frontmost section of the guide trough 7 is provided with a discharge curtain 12, and the multiple sections of the guide troughs 7 connected in series form a fully enclosed feeding cavity through the sealing cap 6, the sealing box 3, the sealing skirt 10 and the discharge curtain 12;

[0055] The dust removal chamber 5 includes a dust removal feed pipe 23 vertically arranged at the top of the sealing top 6, a dust removal discharge pipe 28 obliquely arranged at the top of the sealing top 6, and an arc-shaped elbow pipe 27 arranged between the dust removal feed pipe 23 and the dust removal discharge pipe 28, and the angle between the dust removal feed pipe 23 and the dust removal discharge pipe 28 is 30-35°; the dust removal chamber 5 is arranged downstream of the coal drop pipe 4 and is connected to the guide trough 7, and is used to capture and separate dust in the dust-laden airflow;

[0056] The dust filter chamber 11 includes an inverted V-shaped tube body 29 connected to the top of the sealing cap 6 at both ends, the angle of the inverted V-shaped tube body 29 is 60°, the dust removal feed pipe 23 and the inverted V-shaped tube body 29 are both provided with a connecting hole 24 and a filter screen plate 26, and the dust removal chamber 5 and the dust filter chamber 11 are both provided with a guide plate 30;

[0057] The dust filter chamber 11 is arranged downstream of the dust removal chamber 5 and is connected through the material guide trough 7 for further filtering and purifying the dust-laden airflow.

[0058] After the material falls from the coal drop pipe 4, it enters the guide trough 7. Since the feeding cavity is a fully sealed structure, it forms a sealed connection with the conveyor belt 1 through the sealing skirt 10, reducing the flow of air in the sealed space to reduce the escape force of dust. A dust removal chamber 5 and a dust filter chamber 11 are provided downstream of the guide trough 7. The dust removal chamber 5 and the dust filter chamber 11 are used to promote dust sedimentation and separation and improve the dust filtering effect. The dust-containing airflow generated when the material falls diffuses in the guide trough 7 and is guided by the guide plate 30 structure at the dust removal feed end, enters the dust removal chamber 5 and then enters the dust removal discharge pipe 28 through the arc-shaped bend pipe 27 and flows back to the conveyor belt 1 to promote the sedimentation and separation of dust. Among them, the dust removal feed pipe 23 is vertically arranged, and the angle between the dust removal feed pipe 23 and the dust removal discharge pipe 28 is 30-35°. The dust removal chamber 5 can better promote the diversion of materials and the sedimentation of dust through a specific corner structure. Dust is deposited in the dust removal chamber 5 due to gravity, and is eventually conveyed away with the material. After being processed in the dust removal chamber 5, the dust-laden airflow continues to move forward and enters the dust filter chamber 11. The dust filter chamber 11 has a specific inverted V-shaped tube body 29 structure, and is designed with a guide plate 30 to separate the gas from the remaining dust for a second time to further improve the dust filtering effect. The dust removal feed pipe 23 and the inverted V-shaped tube body 29 are also formed with a connecting hole 24 with a filter screen plate 26. The connecting hole 24 can release the air pressure in the pipeline while preventing dust from being output. The material after dust removal finally falls back onto the conveyor belt and continues to move to the next level of delivery point.

[0059] In the whole process, the unpowered dust collector uses the airflow generated when the material falls as the power source. The whole dust collector does not need external power supply. It uses the principle of aerodynamics to achieve effective separation and collection of dust, reducing pollution to the environment and avoiding secondary pollution. This process does not require external energy input, which reflects the energy-saving and environmental protection characteristics of the unpowered dust collector and reduces operating costs. At the same time, the structural design is simple, easy to install and maintain, reducing the failure rate and maintenance work, and shortening the project cycle.

[0060] The equipment integrates sedimentation dust removal and inertial dust removal. Based on the principle of aerodynamics, the pressure in the air flow is converted into power, and the dust-containing gas is introduced into the separation equipment. The dust-containing gas is automatically separated and dusted by inertial and gravity sedimentation. The dust falls on the belt and is taken away. After dust removal, it is discharged to the outside of the guide trough 7 through the connecting hole 24, which completely solves the problem of air pressure inside the closed loop. The dust removal efficiency is as high as more than 99%. This process modification breaks through the single design idea of ​​traditional dust removal equipment and is a new type of energy-saving dust removal equipment. The dust escape is effectively controlled during the entire operation process, reducing pollution to the environment, extending the service life of the conveyor belt, and reducing the operating costs of the enterprise. Improve the sealing of the guide trough 7, reduce material impact, promote the green transformation of industrial production, and achieve sustainable development. With the advantages of energy saving, environmental protection, high efficiency, easy maintenance, economical and practical, it provides an effective alternative to traditional dust removal technology, helps enterprises reduce operating costs, improve production efficiency, and is of great significance to promoting the sustainable development of industrial production.

[0061] As a further improvement, a plurality of adjustable damping dust-blocking curtains 8 are provided in the material guiding chute 7, and the addition of the damping dust-blocking curtains 8 can adapt to different material characteristics and dust quantities.

[0062] Among them, at least one damping dust curtain 8 must be provided between the sealing box 3 and the coal drop pipe 4 to prevent materials and dust from flowing backwards, while the damping dust curtain 8 is not installed between the coal drop pipe 4 and the dust removal chamber 5, which not only avoids the problem of rapid damage of the damping dust curtain 8 after installing it in this area, but also forms sufficient airflow inside the entire feeding cavity, thereby driving the floating dust into the dust removal chamber 5, and multiple damping dust curtains 8 are installed in the inlet and outlet sections to effectively block the dust.

[0063] Further improvement is as follows: Figure 2 As shown, the sealing skirt 10 includes a rectangular sealing plate 17 and a support plate 15 obliquely arranged on the outside of the sealing plate 17. The sealing plate 17 and the support plate 15 are combined to form a "human" structure. A reinforcing rib 16 with an arc-shaped protrusion is provided on the inner side of the lower end of the support plate 15. The sealing skirt 10 is made of a wear-resistant rubber plate.

[0064] The upper edge of the sealing plate 17 is fixed to the side of the guide groove 7 by the clamping device 9, so that the bottom of the sealing plate 17 and the support plate 15 are connected to the surface of the conveyor belt 1, and the sealing plate 17 plays a sealing role through the contact friction with the conveyor belt 1, and the support plate 15 arranged on the outside of the sealing plate 17 can play a secondary positioning role, and at the same time support the sealing plate 17 to prevent the materials on both sides of the guide groove 7 from flowing out along the gaps on both sides of the conveyor belt 1, and to prevent the external air from entering the guide groove 7 from the gaps to cause secondary waste gas of dust. Among them, the reinforcing rib 16 protruding in a circular arc shape on the inner side of the lower end can not only improve the supporting effect of the bottom of the support plate 15, but also play a role in re-sealing and increasing wear resistance, so as to avoid the problem that the sealing effect of the sealing skirt 10 is deteriorated due to excessive wear of the support plate 15.

[0065] A further improvement is that the clamping device 9 includes a fixed seat 18 arranged on the side wall of the material guide trough 7, an L-shaped pressure rod 20 arranged on the fixed seat 18, and an angle iron bar 21 arranged on the L-shaped pressure rod 20, the fixed seat 18 is provided with a T-shaped mounting groove 19, the L-shaped pressure rod 20 is fixed to the T-shaped mounting groove 19 by bolts, the lower end of the L-shaped pressure rod 20 is provided with a V-shaped limiting groove 22, the angle iron bar 21 is positioned and clamped by the V-shaped limiting groove 22, and one side of the sealing plate 17 is clamped on the side wall of the material guide trough 7 by the angle iron bar 21.

[0066] When the sealing skirt 10 is fixed, the clamping device 9 is composed of a fixing seat 18 with a T-shaped mounting groove 19, an angle iron bar 21, a fixing bolt and an L-shaped pressure rod 20 with a V-shaped limiting groove 22. A clamping device 9 is installed at a certain distance. When the sealing skirt 10 is fixed, the sealing skirt 10 is first placed on the conveyor belt 1. At the same time, the L-shaped pressure rod 20 is positioned in the T-shaped mounting groove 19 by bolts, and then the angle iron bar 21 is placed on the outside of the sealing plate 17 and its external V-shaped sharp corner is embedded in the V-shaped limiting groove 22. Finally, the angle iron bar 21 is tightened and fixed to the sealing skirt 10 by tightening the bolts to achieve the installation and positioning of the sealing skirt 10. During the installation process, the long angle iron bar 21 can be effectively limited and fixed through the V-shaped limiting groove 22, avoiding the problem of difficulty in positioning during use and the problem of difficulty in generating full pressure after compression. After installation, the sealing skirt 10 can achieve tight compression of the angle iron bar 21 through the lever principle of the L-shaped pressure rod 20, and prevent the phenomenon of falling off due to excessive friction. The angle iron bar 21 is used for compression, and the entire sealing skirt 10 can be compressed synchronously, and the number of locking bolts required is less. Since the sealing skirt 10 is a consumable, it is easy to cause the problem of inability to ensure sealing due to wear during long-term use. The general structure is difficult to adjust the height of the sealing skirt 10. After being fixed by this structure, it is more convenient to adjust the height of the sealing skirt 10, with lower operating difficulty and faster construction efficiency. The unpowered dust collector is provided with sealing skirts 10 made of wear-resistant rubber plates on both sides of the guide trough 7. After the sealing skirts 10 are clamped by the clamping device 9, it can ensure that the sealing skirts 10 are in close contact with the conveyor belt 1 during operation. When the impact airflow generated by the falling material is in the guide trough 7, it is blocked by the sealing skirts 10 and rebounds, thereby preventing dust from escaping from the gap. The clamping device 9 can be easily adjusted and replaced, thereby ensuring a long-term sealing effect.

[0067] Further improvement is as follows: Figure 3 As shown, an inclined guide roller 13 is provided on both sides of the support roller 14 , and the two sides of the conveyor belt 1 and the sealing skirt 10 are intermittently pressed upward by the guide rollers 13 .

[0068] A row of inclined guide rollers 13 are provided on the frame 2 on both sides of the bottom of the conveyor belt 1, so that the edges of the conveyor belt 1 and the sealing skirt 10 are in a transitional upward pressing state through the guide rollers 13, which can ensure the close fit between the conveyor belt 1 and the sealing skirt 10, prevent air from blowing in from both sides of the conveyor belt 1, and also prevent materials from flowing out from both sides of the conveyor belt 1.

[0069] As a further improvement, the side surface and the bottom surface of the material guide groove 7 form an inverted "eight"-shaped structure, and the sealing top 6 on the material guide groove 7 adopts an arc top structure.

[0070] The design of the guide chute 7 of the unpowered dust collector is crucial. The guide chute 7 adopts an inverted trapezoidal cross-section design with an arc-shaped top structure, which can ensure that the coal flow enters the conveyor belt smoothly from the coal drop pipe 4, reducing impact and dust generation. The guide chute 7 adopts an inverted "eight"-shaped structure and an arc-shaped top design to increase the internal space and reduce the internal pressure, thereby effectively preventing dust from overflowing. Reduce dust at the source; by improving the sealing of the guide chute 7, increasing the volume inside the guide chute 7, and adding dust removal chambers 5, dust filter chambers 11 and sealing skirts 10 and other structures, ensure that when the air flow velocity at the outlet of the guide chute 7 is lower than 2m / s, very little dust is discharged, achieving "treating both the symptoms and the root causes". At the same time, the fully sealed guide chute 7 reduces the splashing and dispersion of materials during transportation, reduces material losses, and improves the utilization rate of materials. This is of great significance for material cost control and the improvement of enterprise economic benefits.

[0071] Further improvement is as follows: Figures 4 to 7 As shown, the guide plate 30 includes a guide plate 31 whose top is fixed in the dust removal feed pipe 23, and a plurality of guide vanes 32 arranged below the guide plate 31. The guide vanes 32 and the bottom of the guide plate 31 are both arranged in an arc-shaped structure. The guide plate 30 is fitted with the arc-shaped top of the material guide trough 7 through the guide plate 30, and the guide plate 30 is fitted with the conveyed materials in different areas through the guide vanes 32.

[0072] When the conveyor belt 1 is conveying materials, the materials on the conveyor belt 1 basically present an arc-shaped raised mountain shape, and when the airflow moves in the material guide trough 7, although airflow will be generated, since the material is not in complete contact with the material guide trough 7, although the flow of airflow can be slowed down by the damping dust curtain 8, the dust still floats in the cavity and cannot be quickly relieved, resulting in a large amount of air dust in the material currently discharged from the outlet. This can only be alleviated by increasing the number of damping dust curtains 8, the length of the material guide trough 7, or the number of dust removal chambers 5 and dust filter chambers 11. No matter which one is increased, there will be problems such as installation space and cost. Therefore, in order to enable the dust in the airflow to achieve better buffering and sedimentation with the minimum number of dust removal chambers 5 and dust filter chambers 11, a special guide plate 30 is fixed on the side close to the outlet at the dust removal feed end, for example, its upper end is fixed in the dust removal feed pipe 23, and the guide plate 30 is used to form a sheet-like guide plate 31 in the area where the material is basically not accumulated at the upper end of the inner part of the guide groove, and the guide plate 32 and the bottom of the guide plate 31 are both arranged in an arc-shaped structure, which can enable the dust-carrying airflow to move upward better when the airflow hits the guide plate 31, and a plurality of guide plates 32 are formed below it, which can contact the surface of the material through the guide plate 32, and the bottom is tilted backward with the material, so that the entire guide plate 30 is more comprehensive when guiding the airflow, avoiding the problem of a large amount of airflow flowing directly backward, so that the dust removal chamber 5 can play a better dust removal role, and the same is true for the dust filter chamber 11.

[0073] Further improvement is as follows: Figure 8 As shown, the coal dropping pipe 4 extends into the material guiding trough 7, and a shock absorbing device 33 is provided at the bottom of the connection between the coal dropping pipe 4 and the material guiding trough 7. The materials falling onto the conveyor belt 1 through the coal dropping pipe 4 are buffered by the shock absorbing device 33 at the bottom.

[0074] A shock absorbing device 33 is added at the junction of the coal dropping pipe 4 and the material guiding trough 7, i.e. the material dropping point. The shock absorbing device 33 can automatically remove the impact of the material on the conveying belt 1 and cut off the airflow caused by the material dropping process, so that the whole equipment can run more smoothly and the sealing of the material guiding trough 7 is better.

[0075] A further improvement is that the shock absorbing device 33 includes a plurality of rubber buffer blocks 34 arranged on the frame 2 and a base 35 for fixing the rubber buffer blocks 34. The rubber buffer blocks 34 are detachably mounted on the base 35, and the height and tilt angle of the rubber buffer blocks 34 are adjusted by the base 35.

[0076] The rubber buffer block 34 is installed to the bottom of the conveyor belt 1 through the base 35. When the material falls onto the conveyor belt 1, the material is depressurized by the rubber buffer block to prevent the material from directly impacting the conveyor belt 1 and causing gaps on both sides. The rubber buffer block 34 is detachably installed on the base 35. The height and inclination angle of the rubber buffer block 34 are adjusted by the base 35. When the rubber buffer block 34 is damaged or the height is not appropriate, targeted adjustments can be made directly to make the entire buffering effect better and more targeted.

[0077] As a further improvement, the coal drop pipe 4 is a curved structure to reduce the impact and dust generation when the material falls.

[0078] The structure of the coal drop pipe 4 is designed and optimized, and a C-shaped curved structure is adopted. Compared with the traditional straight-drop coal drop pipe 4, the curved coal drop pipe 4 changes the falling trajectory of the material and affects the material flow route, effectively slowing down the impact speed of the material on the conveyor belt, interfering with the force generated when the material falls freely, guiding the material flow, and reducing the impact of the material on the conveyor belt when it falls. When the material falls in the curved coal drop pipe 4, the dust generated by the high-speed impact is reduced due to the slowing down of the speed and the guidance of the trajectory. The coal drop pipe 4 slows down the impact of the material falling and reduces the generation of dust. In order to improve the sealing of the guide trough 7, the design of the coal drop pipe 4 ensures the collection and transportation of the material, reduces the air entrainment, and slows down the rate of descent. The material first falls from the upper-level conveying equipment to the lower-level conveying equipment through the coal drop pipe 4, which not only slows down the high and low pressure airflow formed by the material speed, helps to reduce the generation of dust and improve the dust removal efficiency, but also reduces the load on the dust removal system, thereby reducing the generation of noise and dust. This design helps to create a quieter and more comfortable working environment. Since the impact of falling materials is reduced, the wear on the conveyor belt is also reduced accordingly, which helps to extend the service life of the conveyor belt and reduce replacement frequency and maintenance costs.

[0079] As a further improvement, an openable and closable observation and maintenance window 25 is provided on the outer side of the connecting hole 24 to facilitate observation and maintenance.

[0080] When there is a problem with the filter screen plate 26 , it can be discovered and repaired in time by observing the inspection window 25 .

[0081] Embodiment 2:

[0082] A method for unpowered dust removal of a conveyor belt, the method comprising:

[0083] S1, the material falls into the guide chute 7 through the curved coal drop pipe 4, and moves forward along the conveyor belt 1 after being buffered by the shock absorbing device 33;

[0084] S2, the impact airflow generated by the falling material is guided by the guide plate 30 and enters the dust removal chamber 5 to slow down the flow and dust reduction. At the same time, part of the gas is filtered by the filter plate 26 and then discharged outward along the connecting hole 24;

[0085] S3, the airflow after passing through the dust removal chamber 5 is blocked and rebounded by the multiple damping dust curtains 8 in the guide trough 7;

[0086] S4, the airflow after being buffered by the dust removal chamber 5 and the multi-pass damping dust curtain 8 enters the dust filter chamber 11 through the guide plate 31 for secondary separation and filtration. At the same time, a part of the gas is filtered by the filter screen plate 26 on the dust filter chamber 11 and then discharged outward along the connecting hole 24;

[0087] S5. The dust and airflow after passing through the dust filter chamber 11 are blocked by multiple damping dust curtains 8, and then discharged outward after being blocked the most by the discharge curtain 12 at the outlet end.

[0088] By comprehensively applying the principles of aerodynamics, inertial dust removal, gravity sedimentation and spray dust removal, the air pressure is converted into power, and the dust-laden gas is guided into the separation equipment to achieve automatic separation and dust removal. This not only improves the dust removal efficiency, but also solves the problem of air pressure inside the closed loop. The dust removal efficiency can reach more than 99%.

[0089] The above-mentioned implementation modes are only preferred implementation modes of the present application and cannot be used to limit the scope of protection of the present application. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present application shall fall within the scope of protection required by the present application.

Claims

1. A conveyor belt unpowered dust collector, comprising a frame (2), a conveyor belt (1) arranged on the frame (2), a plurality of guide troughs (7) arranged on the frame (2), a support roller (14) arranged at the bottom of the conveyor belt (1), and a coal drop pipe (4) connected to the starting end of the guide trough (7), wherein the material on the upper conveyor belt falls to the end of the conveyor belt (1) through the coal drop pipe (4) and is transported forward, and the conveyed material on both sides of the conveyor belt (1) is limited by the guide trough (7), characterized in that: The frame (2) is also provided with a dust removal chamber (5), a dust filter chamber (11), a sealing skirt (10) and a clamping device (9); The top of the material guide trough (7) is provided with a sealing cap (6), the outside of the material guide trough (7) at the starting end is provided with a sealing box (3), and the bottom of the material guide trough (7) is arranged above the conveyor belt (1) to guide the material and control the diffusion of dust; The sealing skirt (10) is installed on both sides of the material guide trough (7) along the conveying belt (1) through the clamping device (9), and a sealing structure is formed between the conveying belt (1) and the material guide trough (7) through the sealing skirt (10); A discharge curtain (12) is provided at the discharge port end of the frontmost section of the material guide trough (7), and a plurality of sections of the material guide trough (7) connected in series form a fully enclosed feeding cavity through the combination of the sealing cap (6), the sealing box (3), the sealing skirt (10) and the discharge curtain (12); The dust removal chamber (5) comprises a dust removal feed pipe (23) vertically arranged at the top of the sealing top (6), a dust removal discharge pipe (28) obliquely arranged at the top of the sealing top (6), and an arc-shaped curved pipe (27) arranged between the dust removal feed pipe (23) and the dust removal discharge pipe (28), wherein the angle between the dust removal feed pipe (23) and the dust removal discharge pipe (28) is 30 to 35 degrees; the dust removal chamber (5) is arranged downstream of the coal drop pipe (4) and is connected to the guide trough (7) for capturing and separating dust in the dust-laden airflow; The dust filter chamber (11) comprises an inverted V-shaped tube body (29) whose two ends are connected to the top of the sealing cap (6), the angle of the inverted V-shaped tube body (29) is 60°, the dust removal feed pipe (23) and the inverted V-shaped tube body (29) are both provided with a connecting hole (24) and a filter screen plate (26), and the dust removal chamber (5) and the dust filter chamber (11) are both provided with a guide plate (30); The dust filter chamber (11) is arranged downstream of the dust removal chamber (5) and is connected to the dust removal chamber (5) through the material guide trough (7) for further filtering and purifying the dust-containing airflow.

2. The unpowered dust collector for conveyor belt according to claim 1, characterized in that: The sealing skirt (10) comprises a rectangular sealing plate (17) and a support plate (15) arranged obliquely on the outside of the sealing plate (17); the sealing plate (17) and the support plate (15) are combined to form a herringbone structure; a circular arc-shaped protruding reinforcing rib (16) is provided on the inner side of the lower end of the support plate (15); and the sealing skirt (10) is made of a wear-resistant rubber plate.

3. The unpowered dust collector for conveyor belt according to claim 2, characterized in that: The clamping device (9) comprises a fixing seat (18) arranged on the side wall of the material guide groove (7), an L-shaped pressure rod (20) arranged on the fixing seat (18), and an angle iron bar (21) arranged on the L-shaped pressure rod (20); the fixing seat (18) is provided with a T-shaped mounting groove (19); the L-shaped pressure rod (20) is fixed to the T-shaped mounting groove (19) by bolts; a V-shaped limiting groove (22) is provided at the lower end of the L-shaped pressure rod (20); the angle iron bar (21) is positioned and pressed by the V-shaped limiting groove (22); and one side of the sealing plate (17) is clamped on the side wall of the material guide groove (7) by the angle iron bar (21).

4. The unpowered dust collector for conveyor belt according to claim 1, characterized in that: An inclined guide roller (13) is provided on each side of the support roller (14), and the two sides of the conveyor belt (1) and the sealing skirt (10) are intermittently pressed upward by the guide roller (13).

5. The unpowered dust collector for conveyor belt according to claim 1, characterized in that: The side surface and the bottom surface of the material guide groove (7) form an inverted "eight"-shaped structure, and the sealing top (6) on the material guide groove (7) adopts a circular arc top structure.

6. The unpowered dust collector for conveyor belt according to claim 1, characterized in that: The guide plate (30) comprises a guide plate (31) whose top is fixed in the dust removal feed pipe (23), and a plurality of guide vanes (32) arranged below the guide plate (31); the guide vanes (32) and the bottom of the guide plate (31) are both arranged in an arc-shaped structure; the guide plate (30) is in contact with the arc-shaped top of the material guide trough (7) through the guide plate (30); and the guide plate (30) is in contact with conveying materials in different areas through the guide vanes (32).

7. The unpowered dust collector for conveyor belt according to claim 1, characterized in that: The coal dropping pipe (4) extends into the material guiding trough (7), and a shock absorbing device (33) is provided at the bottom of the connection between the coal dropping pipe (4) and the material guiding trough (7). The material falling onto the conveyor belt (1) through the coal dropping pipe (4) is buffered by the shock absorbing device (33) at the bottom.

8. The unpowered dust collector for conveyor belt according to claim 7, characterized in that: The shock absorbing device (33) comprises a plurality of rubber buffer blocks (34) arranged on the frame (2) and a base (35) for fixing the rubber buffer blocks (34); the rubber buffer blocks (34) are detachably mounted on the base (35); and the height and tilt angle of the rubber buffer blocks (34) are adjusted via the base (35).

9. The unpowered dust collector for conveyor belt according to claim 8, characterized in that: The coal drop pipe (4) is a curved structure to reduce the impact and dust generation when the material falls.

10. A method for unpowered dust removal of a conveyor belt, characterized in that: The conveyor belt unpowered dust collector according to any one of claims 1 to 9, wherein the dust removal method comprises: S1, the material falls into the material guide chute (7) through the curved coal drop pipe (4), is buffered by the shock absorbing device (33), and then moves forward along the conveyor belt (1); S2, the impact airflow generated by the falling material is guided by the guide plate (30) and enters the dust removal chamber (5) for slow flow and dust reduction. At the same time, a part of the gas is filtered by the filter screen plate (26) and discharged outward along the connecting hole (24); S3, the airflow after passing through the dust removal chamber (5) is blocked and rebounded by the multiple damping dust curtains (8) in the material guide trough (7); S4, the airflow buffered by the dust removal chamber (5) and the multiple damping dust curtains (8) enters the dust filter chamber (11) through the guide plate (31) for secondary separation and filtration. At the same time, a portion of the gas is filtered by the filter screen plate (26) on the dust filter chamber (11) and then discharged outward along the connecting hole (24); S5. The dust and airflow after passing through the dust filter chamber (11) are blocked by multiple damping dust curtains (8) and then discharged outward after being blocked the most by the discharge curtain (12) at the outlet end.

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