Belt conveyor dust removal device and method convenient to clean

Abstract

The invention provides a belt conveyor dust removal device and method convenient to clean. The belt conveyor dust removal device comprises a sealing cover providing a conveying channel for a belt, and a first-stage backflow pipe and a second-stage backflow pipe are sequentially arranged at the top of the sealing cover in the belt conveying direction; the top of the first-stage backflow pipe and the top of the second-stage backflow pipe are respectively provided with a blowing pipe, the first-stage backflow pipe is communicated with an inner cavity of the sealing cover to form a first-stage circulation channel, the second-stage backflow pipe is communicated with the inner cavity of the sealing cover to form a second-stage circulation channel, and the airflow direction in the first-stage circulation channel and the airflow direction in the second-stage circulation channel are opposite to the belt conveying direction. According to the belt conveyor dust removal device and method convenient to clean, energy media such as water and electricity do not need to be used, unpowered dust suppression is achieved, dust forms vortex and rotation in the channel, the dust falls back to the surface of the belt after energy exhaustion, and material recovery is achieved; the blowing pipe is installed on the top of the backflow pipe and used for regularly cleaning an inner cavity of the backflow pipe, dust accumulation is prevented, and efficient operation of equipment is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of conveyor dust treatment, and in particular relates to a dust removal device and method for a belt conveyor that is convenient for cleaning. Background Art

[0002] As a core device for material transportation in industries such as metallurgy and mining, the main function of a belt conveyor is to achieve efficient and continuous transportation of materials. However, during the material transportation process, due to the running speed of the belt and the drop between adjacent belt transfer points, the shear air flow generated when the material falls is likely to cause dust diffusion, resulting in serious environmental pollution, endangering the health of operating personnel, and may also lead to material waste.

[0003] Traditional dust removal methods mostly use an enclosed hood combined with an air suction dust removal system, and maintain a negative pressure inside the hood through an external power source (such as a fan) to capture dust. However, in the scenario of long-distance transportation, the negative pressure inside the enclosed hood decreases significantly with the increase of distance, resulting in a sharp decline in dust removal efficiency. Although the existing technology can partially alleviate the problem by adding a fan or water spray dust suppression, such solutions have high energy consumption and complex equipment maintenance.

[0004] In recent years, as a new type of dust removal method, the non-powered dust removal technology enables dust to circulate in a specially designed sealed channel, and after the energy is exhausted, it falls back to the belt surface to complete dust removal. Compared with the traditional air suction dust removal system, it does not require additional energy and has low operating costs. However, the existing non-powered dust removal device for conveyors has poor self-cleaning ability. After long-term operation, the dust on the inner wall of the sealed channel becomes caked, and it is necessary to stop the machine frequently for manual cleaning, which affects the production continuity. Summary of the Invention

[0005] In order to solve the problems existing in the prior art, the present invention aims to propose a dust removal device and method for a belt conveyor that is convenient for cleaning, which solves the problems of poor self-cleaning ability of the existing non-powered dust removal device, the need for frequent shutdown for manual cleaning, and the impact on production efficiency.

[0006] To achieve the above object, the technical solution of the present invention is realized as follows:

[0007] A dust removal device for a belt conveyor that is convenient for cleaning includes a sealed hood that provides a transportation channel for the belt. An primary return pipe and a secondary return pipe are sequentially arranged on the top of the sealed hood along the belt transportation direction;

[0008] The primary return pipe is communicated with the inner cavity of the sealed hood to form a primary circulation channel, and the shape of the primary circulation channel is a right triangle; the secondary return pipe is communicated with the inner cavity of the sealed hood to form a secondary circulation channel, and the shape of the secondary circulation channel is an isosceles triangle. The air flow directions in the primary circulation channel and the secondary circulation channel are opposite to the belt transportation direction;

[0009] Inside the sealing cover, along the air flow direction in the primary circulation channel, dust suppression devices are successively arranged behind the inlet of the primary return pipe, in front of the outlet, and behind the inlet of the secondary return pipe. Spray pipes for cleaning the inner cavity of the return pipes are respectively installed at the tops of the primary return pipe and the secondary return pipe.

[0010] Further, the angles of both acute angles of the primary circulation channel are 45 degrees.

[0011] Further, the primary return pipe includes an inlet section and an outlet section. The inlet section is the right-angle side of a right triangle, and the outlet section is the hypotenuse of the right triangle.

[0012] Further, the base angle of the secondary circulation channel is 60 degrees to 70 degrees.

[0013] Further, the secondary return pipe includes an inlet section and an outlet section. The inlet section and the outlet section are respectively two sides with equal lengths in an isosceles triangle.

[0014] Further, the diameters of the inlet sections of the primary return pipe and the secondary return pipe are both smaller than the diameters of the outlet sections.

[0015] Further, the dust suppression device is a dust suppression curtain formed by splicing a plurality of vertical strips of rubber.

[0016] Further, a sealing cover is arranged at the connection between the spray pipe and the sealing cover.

[0017] A dust removal method for a belt conveyor that is convenient for cleaning includes the following steps:

[0018] S1. When materials fall on the belt, a dust-containing air flow is generated. The dust-containing air flow flows in the sealing cover along the belt transportation direction. When it flows through the dust suppression device at the outlet end of the primary return pipe, part of the dust is intercepted, and the remaining dust-containing air flow passes through the first dust suppression device and flows forward;

[0019] S2. When the dust-containing air flow flows through the inlet of the primary return pipe, part of it enters the primary return pipe under the action of negative pressure, causing the dust to settle on the belt under the action of gravity; at the same time, the dust-containing air flow that does not enter the primary return pipe continues to flow forward. Part of it is blocked and rebounded by the dust suppression device at the inlet end of the primary return pipe, and the remaining dust-containing air flow passes through the dust suppression device and flows forward. The rebounded dust-containing air flow and the dust-containing air flow flowing out of the outlet of the primary return pipe repeat step S2;

[0020] S3, when the dust-laden airflow flows through the secondary return pipe, part of it enters the secondary return pipe under the action of negative pressure, so that the dust settles on the belt under the action of gravity; at the same time, the dust-laden airflow that has not entered the secondary return pipe continues to flow forward, and part of it is blocked and rebounded by the dust suppression device at the inlet end of the secondary return pipe, and the remaining dust-laden airflow passes through the dust suppression device and flows forward, and the rebounded dust-laden airflow and the dust-laden airflow flowing out of the outlet of the secondary return pipe repeat step S3;

[0021] S4. When the material transportation is completed, open the blowing pipe to clean the dust inside the primary reflux pipe and the secondary reflux pipe. After the cleaning is completed, close the blowing pipe.

[0022] Furthermore, the pressure of the compressed gas in the blowing pipe is 0.6 MPa.

[0023] Compared with the prior art, the easy-to-clean belt conveyor dust removal device and method described in the present invention have the following advantages:

[0024] (1) The easy-to-clean belt conveyor dust removal device described in the present invention does not require the use of energy media such as water and electricity, and realizes unpowered dust suppression. The primary return pipe and the secondary return pipe are arranged on the top of the sealing cover in sequence to form right-angled triangle and isosceles triangle circulation channels respectively. The aerodynamic principles are used to make the dust form eddy currents and swirls in the channels, and the dust falls back to the belt surface after energy exhaustion, thereby realizing material recovery. The blowing pipe is installed on the top of the return pipe to regularly clean the inner cavity of the return pipe to prevent dust accumulation and ensure efficient operation of the equipment.

[0025] (2) The easy-to-clean belt conveyor dust removal method described in the present invention is that when the material passes through the primary circulation channel and the secondary circulation channel area at a certain speed, it will undergo a special rotation and turning process. The gas flowing in the triangular container can form eddies and whirlpools, which allows the dust to flow back and eventually land on the belt. The newly entered dust collides with the dust that has already turned around in the primary reflux pipe and the secondary reflux pipe, and the circulation speed of the dust is reduced. At the same time, the mixing between the dust generated during the transportation process and the transported material is promoted, making them more uniform, which not only reduces the amount of dust, but also increases the weight of the material, which is beneficial to the subsequent process processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0028] Figure 2This is a side view of the overall structure provided by the embodiments of the present invention.

[0029] Explanation of reference numerals:

[0030] 1. Belt; 2. Sealing cover; 3. Primary reflux pipe; 4. Secondary reflux pipe; 5. Dust suppression device; 51. First dust suppression device; 52. Second dust suppression device; 53. Third dust suppression device; 6. Blowing pipe; 7. Sealing cover. Detailed implementation manners

[0031] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0034] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0035] As Figures 1 to 2 shown, a dust removal device for a belt conveyor that is convenient for cleaning includes a sealing cover 2 that provides a transportation channel for the belt 1, and a primary reflux pipe 3 and a secondary reflux pipe 4 are sequentially arranged at the top of the sealing cover 2 along the transportation direction of the belt 1;

[0036] A blow pipe 6 for cleaning the inner cavity of the reflux pipe is respectively installed at the top of the first-stage reflux pipe 3 and the second-stage reflux pipe 4. The inner cavity of the first-stage reflux pipe 3 is communicated with the inner cavity of the sealing cover 2 to form a first-stage circulation channel, and the shape of the first-stage circulation channel is a right triangle; the inner cavity of the second-stage reflux pipe 4 is communicated with the inner cavity of the sealing cover 2 to form a second-stage circulation channel, and the shape of the second-stage circulation channel is an isosceles triangle. The air flow directions in the first-stage circulation channel and the second-stage circulation channel are opposite to the belt transportation direction.

[0037] Along the air flow direction in the first-stage circulation channel inside the sealing cover, dust suppression devices 5 are sequentially arranged behind the inlet of the first-stage reflux pipe 3, in front of the outlet, and behind the inlet of the second-stage reflux pipe 4. The three groups of dust suppression devices are the second dust suppression device 52, the first dust suppression device 51, and the third dust suppression device 53 in sequence. A blow pipe for cleaning the inner cavity of the reflux pipe is respectively installed at the top of the first-stage reflux pipe and the second-stage reflux pipe.

[0038] Here, the front refers to the direction of continuous transmission along the air flow direction in the first-stage circulation channel. As Figure 1 shown, a dust suppression device 5 is arranged in front of the outlet of the first-stage reflux pipe 3, that is, the first dust suppression device 51 is arranged on the right side of the first-stage reflux pipe 3;

[0039] The rear refers to the direction opposite to the air flow direction in the first-stage circulation channel. As Figure 1 shown, a dust suppression device 5 is arranged behind the inlet of the first-stage reflux pipe 3, that is, the second dust suppression device 52 is arranged on the left side of the first-stage reflux pipe 3; a dust suppression device 5 is arranged behind the inlet of the second-stage reflux pipe 4, that is, the third dust suppression device 53 is arranged on the left side of the second-stage reflux pipe 4. Arranging the dust suppression device 5 behind the inlet of the reflux pipe can intercept and rebound the dust-containing air flow that is transported along the belt direction but does not enter the circulation channel.

[0040] For the dust removal device of the belt conveyor that is easy to clean described in the present invention, the belt 1 is installed inside the sealing cover 2 through brackets, rollers, etc. The sealing cover 2 is respectively communicated with the first-stage reflux pipe 3 and the second-stage reflux pipe 4 to form a closed-loop channel, guiding the dust-containing air flow to circulate along a preset path to avoid disorderly diffusion. According to the actual length of the belt 1, multiple groups of dust reflux combinations composed of the first-stage reflux pipe 3 and the second-stage reflux pipe 4 can be set at certain intervals to further improve the dust removal effect and the material handling efficiency.

[0041] In a preferred embodiment of the present invention, the angles of the two acute angles of the first-stage circulation channel are both 45 degrees. The first-stage reflux pipe 3 includes an inlet section and an outlet section. The inlet section is a right-angled side of the right triangle, and the outlet section is the hypotenuse of the right triangle.

[0042] Specifically, when the dusty airflow enters the first-stage return pipe 3 through the inlet section and moves at a certain speed, the 45-degree corner design can effectively change the movement direction of the dust, optimize the flow path of the dust in the channel, cause it to collide more frequently during the process of rotating and turning around, gradually lose its kinetic energy, and finally fall back to the belt surface, improving the dust settlement efficiency and reducing the risk of dust dispersion during transportation.

[0043] In a preferred embodiment of the present invention, the angle of the bottom corner of the secondary circulation channel is 60 degrees to 70 degrees. The secondary return pipe 4 includes an inlet section and an outlet section, and the inlet section and the outlet section are respectively two equal-length sides in an isosceles triangle.

[0044] Specifically, when the dust enters the secondary circulation channel, the 60-70 degree bottom corner can guide the dust to form an orderly swirling flow, causing the dust particles to collide and convert energy in the channel, thereby reducing the kinetic energy of the dust and prompting it to quickly settle and fall back to the belt surface. This angle design not only avoids excessive accumulation of dust in the channel but also ensures that the dust can circulate fully and achieve energy attenuation. At the same time, the isosceles triangle structure makes the lengths of the inlet section and the outlet section equal, ensuring the flow uniformity of the dust during the return process and further improving the dust removal efficiency.

[0045] In a preferred embodiment of the present invention, the diameters of the inlet sections of the first-stage return pipe 3 and the secondary return pipe 4 are both smaller than the diameters of the outlet sections.

[0046] Specifically, the height of the first-stage return pipe 3 is smaller than the height of the secondary return pipe 4. The smaller diameter of the inlet section of the return pipe increases the flow velocity and reduces the pressure of the dust when it enters the return pipe, thereby enhancing the suction effect of the dust and facilitating the collection of the dust and its entry into the circulation channel. As the dust enters the outlet section, the increasing diameter causes the flow velocity to gradually decrease, and the kinetic energy of the dust decreases and is converted into pressure energy, which helps the dust particles to settle and prompts them to fall back to the belt surface to achieve material recovery. The inlet section and the outlet section are designed as a variable-diameter structure, and the impact force of the material on the outlet section becomes smaller after entering the main body, thereby extending the service life of the return pipe.

[0047] In a preferred embodiment of the present invention, the dust suppression device 5 is a dust suppression curtain composed of multiple vertically strip-shaped rubbers. Specifically, the dust suppression curtain is made of wear-resistant and flame-retardant rubber. Multiple groups of dust suppression curtains can be evenly arranged in the sealing cover 2, and the number of layers of the dust suppression curtain is determined according to the actual situation to adapt to different dust concentrations and material characteristics and effectively block the flow of dust.

[0048] In a preferred embodiment of the present invention, a sealing cover 7 is provided at the connection between the blowing pipe 6 and the sealing cover 2.

[0049] Specifically, during normal operation, the sealing cover 7 remains closed, ensuring a good seal at the connection between the injection pipe 6 and the sealing hood 2, preventing dust from leaking to the external environment from this location, further improving the dust removal effect, and reducing environmental pollution. When it is necessary to clean the return pipe, the sealing cover 7 can be opened, and compressed air is injected through the injection pipe 6 to purge the inside of the return pipe, removing the attached dust and impurities. After cleaning, the sealing cover 7 is closed again to restore the normal operation of the equipment. By regularly cleaning the inside of the primary return pipe 3 and the secondary return pipe 4, dust accumulation and blockage can be effectively prevented, reducing equipment wear and the failure rate, thereby extending the service life of the equipment.

[0050] A dust removal method for a belt conveyor that is easy to clean includes the following steps:

[0051] S1. When the material falls on the belt 1, a dust-containing airflow is generated. The dust-containing airflow flows along the belt transportation direction inside the sealing hood. When it passes through the first dust suppression device 51, part of the dust is intercepted, and the remaining dust-containing airflow passes through the first dust suppression device 51 and flows forward;

[0052] S2. When the dust-containing airflow flows through the inlet of the primary return pipe 3, part of it enters the primary return pipe 3 under the action of negative pressure, forming a vortex and a swirl inside the primary return pipe 3, causing the dust to settle on the belt 1 under the action of gravity; at the same time, the dust-containing airflow that does not enter the primary return pipe 3 continues to flow forward, part of it is blocked and rebounded by the second dust suppression device 52, and the remaining dust-containing airflow passes through the second dust suppression device 52 and flows forward. The rebounded dust-containing airflow and the dust-containing airflow flowing out of the outlet of the primary return pipe 3 repeat step S2;

[0053] S3. When the dust-containing airflow flows through the secondary return pipe 4, part of it enters the secondary return pipe 4 under the action of negative pressure, forming a vortex and a swirl inside the secondary return pipe 4, causing the dust to settle on the belt 1 under the action of gravity; at the same time, the dust-containing airflow that does not enter the secondary return pipe 4 continues to flow forward, part of it is blocked and rebounded by the third dust suppression device 53, and the remaining dust-containing airflow passes through the third dust suppression device 53 and flows forward. The rebounded dust-containing airflow and the dust-containing airflow flowing out of the outlet of the secondary return pipe 4 repeat step S3;

[0054] S4. After the material transportation is completed, the injection pipe 6 is opened to clean the dust inside the primary return pipe 3 and the secondary return pipe 4. After cleaning, the injection pipe 6 is closed. The pressure of the compressed gas in the injection pipe 6 is 0.6 MPa.

[0055] The working principle of a dust removal device for a belt conveyor that is easy to clean:

[0056] The dust generated by the belt 1 during material conveyance needs to enter from the inlet section of the return pipe, turn and then flow out from the outlet section. The dust keeps turning in the triangular return pipe, collides and then returns to the inner cavity of the sealing cover 2, falling on the surface of the material conveyed by the belt 1. The triangular return pipe can achieve the turning of the material in the pipeline, replacing the closing friction with the anti-mixing friction between the materials to remove the dust. In addition, to prevent the blockage of the fluid material after long-term operation, the dust accumulated in the return pipe is regularly purged through the blowing pipe 6.

[0057] During the circulation process of the dust-containing air flow, the primary return pipe 3 and the secondary return pipe 4 perform step-by-step attenuation treatment on the circulating air flow. During the circulation process, the dust concentration continuously increases, and the dust will adhere to the dust suppression device 5 and deposit into lumps. When it reaches a certain thickness, it will naturally fall off in lumps under the action of gravity and be transported away with the material; during the forward movement of the remaining dust-containing air flow, its kinetic energy gradually decreases, and the remaining kinetic energy will also be gradually weakened by the blocking effect of the dust suppression device 5 provided in the rear section and finally exhausted; from the start to the end of the conveying process, the above principle process will be automatically generated. Therefore, the mechanism for removing dust also automatically exists in this process.

[0058] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A dust removal device for a belt conveyor that is easy to clean, comprising a sealing cover that provides a conveying channel for the belt, wherein a primary reflux pipe and a secondary reflux pipe are sequentially arranged on the top of the sealing cover along the conveying direction of the belt, and characterized in that: The primary return pipe is connected to the inner cavity of the sealing cover to form a primary circulation channel, and the shape of the primary circulation channel is a right triangle; the secondary return pipe is connected to the inner cavity of the sealing cover to form a secondary circulation channel, and the shape of the secondary circulation channel is an isosceles triangle. The airflow directions in the primary circulation channel and the secondary circulation channel are opposite to the belt conveying direction; Dust suppression devices are arranged in the sealing cover along the air flow direction in the primary circulation channel, in sequence behind the inlet of the primary return pipe, in front of the outlet and behind the inlet of the secondary return pipe. Blowing pipes for cleaning the inner cavity of the return pipe are respectively installed on the top of the primary return pipe and the secondary return pipe.

2. The easy-to-clean belt conveyor dust removal device according to claim 1, characterized in that: The two acute angles of the primary circulation channel are both 45 degrees.

3. The easy-to-clean belt conveyor dust removal device according to claim 1, characterized in that: The inlet section of the primary reflux pipe is the right-angled side of the right triangle, and the outlet section is the hypotenuse of the right triangle.

4. The easy-to-clean belt conveyor dust removal device according to claim 1, characterized in that: The bottom angle of the secondary circulation channel is 60 degrees to 70 degrees.

5. The easy-to-clean belt conveyor dust removal device according to claim 1, characterized in that: The inlet section and the outlet section of the secondary reflux pipe are two sides of equal length in an isosceles triangle.

6. The easy-to-clean belt conveyor dust removal device according to claim 1, characterized in that: The inlet section diameters of the primary reflux pipe and the secondary reflux pipe are both smaller than the outlet section diameters.

7. The easy-to-clean belt conveyor dust removal device according to claim 1, characterized in that: The dust suppression device is a dust suppression curtain formed by splicing a plurality of vertical rubber strips.

8. The easy-to-clean belt conveyor dust removal device according to claim 1, characterized in that: A sealing cover is arranged at the connection point between the blowing pipe and the sealing cover.

9. A dust removal method for a belt conveyor that is easy to clean, characterized in that: The easy-to-clean belt conveyor dust removal device described in any one of claims 1 to 8 is implemented, comprising the following steps: S1. When the material falls on the belt, dusty airflow is generated. The dusty airflow flows in the sealing cover along the conveying direction of the belt. When it flows through the dust suppression device at the outlet end of the primary return pipe, part of the dust is intercepted, and the remaining dusty airflow flows forward through the first dust suppression device; S2, when the dust-laden airflow flows through the inlet of the primary return pipe, part of it enters the primary return pipe under the action of negative pressure, so that the dust settles on the belt under the action of gravity; at the same time, the dust-laden airflow that has not entered the primary return pipe continues to flow forward, and part of it is blocked and rebounded by the dust suppression device at the inlet end of the primary return pipe, and the remaining dust-laden airflow passes through the dust suppression device and flows forward, and the rebounded dust-laden airflow and the dust-laden airflow flowing out of the outlet of the primary return pipe repeat step S2; S3, when the dust-laden airflow flows through the secondary return pipe, part of it enters the secondary return pipe under the action of negative pressure, so that the dust settles on the belt under the action of gravity; at the same time, the dust-laden airflow that has not entered the secondary return pipe continues to flow forward, and part of it is blocked and rebounded by the dust suppression device at the inlet end of the secondary return pipe, and the remaining dust-laden airflow passes through the dust suppression device and flows forward, and the rebounded dust-laden airflow and the dust-laden airflow flowing out of the outlet of the secondary return pipe repeat step S3; S4. When the material transportation is completed, open the blowing pipe to clean the dust inside the primary reflux pipe and the secondary reflux pipe. After the cleaning is completed, close the blowing pipe.

10. The easy-to-clean belt conveyor dust removal method according to claim 9, characterized in that: In step S4, the pressure of the compressed gas in the blowing pipe is 0.6 MPa.

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