A belt conveyor mechanism

Abstract

The application discloses a belt conveying mechanism and relates to the technical field of belt conveying, which comprises a return roller, a belt, a blowing pipe, and a gas source conveying assembly; the belt is sleeved on the outside of the return roller; the blowing pipe is arranged at one side of the return roller in a spaced manner and comprises a blowing area, the blowing area being arranged opposite to the belt; and the gas source conveying assembly comprises an inlet end and an outlet end, the inlet end being used for connecting a gas source, and the outlet end being communicated with the blowing pipe. Compared with the prior art, the belt conveying mechanism has the blowing pipe and the gas source conveying assembly arranged at one side of the return roller, the blowing area of the blowing pipe is arranged opposite to the belt corresponding to the outside of the return roller, and the high-pressure airflow blown by the blowing area is used for blowing the belt, so that the dust in the cracks and grooves of the belt is blown clean, the belt is prevented from carrying dust to run, and the problem that the powder in the belt gap is difficult to remove is effectively solved.

Description

Technical Field

[0001] This application relates to the field of belt conveyor technology, and more particularly to a belt conveyor mechanism. Background Technology

[0002] Currently, belt conveyors are commonly used in the blast furnace material handling systems of steel enterprises.

[0003] During the transport of raw materials (such as coke, sinter, pellets, and raw ore) via the main conveyor belt, dust adheres to the working surface of the belt. When the belt rotates, this adhered dust falls onto the floor of the conveyor corridor, generating dust and severely polluting the environment. Currently, the pollution problem in the conveyor corridor caused by the conveyor belt is mainly addressed through manual cleaning.

[0004] However, manual cleaning is not only time-consuming, inefficient, and labor-intensive, but also problematic when the belt surface cracks due to aging. Powder can get trapped in the cracks and cannot be completely removed by traditional cleaning methods. These problems urgently need to be solved. Summary of the Invention

[0005] This application provides a belt conveyor mechanism, including: a return roller, a belt, a purging pipe, and an air source conveying assembly;

[0006] The belt is fitted onto the outside of the return roller;

[0007] The purging pipe is spaced apart from the return roller and located on one side of the return roller. The purging pipe includes a purging area, which is positioned opposite to the belt.

[0008] The gas delivery assembly includes an inlet end and an outlet end. The inlet end is used to connect to the gas source, and the outlet end is connected to the purging pipe.

[0009] In some embodiments, the length of the purging tube is greater than or equal to the length of the return roller; the purging tube is provided with a plurality of air holes spaced apart along its length, and the plurality of air holes form a purging area.

[0010] In some embodiments, the axial direction of the air inlet has an angle with the extension direction of the belt, the angle being greater than or equal to 120° and less than or equal to 150°.

[0011] In some embodiments, the air supply delivery assembly includes: a delivery pipe, one end of which is connected to a purging pipe and the other end of which is connected to an air source; and a pneumatic solenoid valve disposed on the delivery pipe for controlling the on / off state of the delivery pipe.

[0012] In some embodiments, the gas delivery assembly further includes:

[0013] The first connecting member is connected to the conveying pipe and is located on the side of the pneumatic solenoid valve closer to the conveying pipe.

[0014] The second connecting component is connected to the conveying pipe and is located on the side of the pneumatic solenoid valve away from the conveying pipe.

[0015] The bypass pipeline is connected at both ends to the first connecting member and the second connecting member, respectively, and the bypass pipeline is also equipped with a bypass valve.

[0016] In some embodiments, the air supply assembly further includes a solenoid valve air supply connecting pipe, with both ends connected to a pneumatic solenoid valve and a second connecting member, respectively; and a main valve, which is located on the side of the second connecting member away from the pneumatic solenoid valve.

[0017] In some embodiments, a mounting base, a purging pipe fitting, and an air supply delivery assembly are also provided on the mounting base;

[0018] The limiting kit is connected to the fixed base, and the purging pipe and the delivery pipe are inserted into the limiting kit.

[0019] In some embodiments, the limiting assembly is rotatably connected to the fixed base;

[0020] The end of the fixing base near the limiting kit has a rotating through hole;

[0021] The outer periphery of the limiting kit is provided with an arc-shaped rotating part, which passes through the rotating through hole, so that the limiting kit can rotate along the rotating through hole.

[0022] In some embodiments, the end of the fixing base near the limiting kit is provided with a limiting hole, which communicates with the rotating through hole;

[0023] A stopper, one end of which passes through a limiting hole, is used to stop the arc-shaped rotating part;

[0024] The positioning marker is set at the position of the fixed base near the limiting hole;

[0025] The arc-shaped scale is set on the surface of the arc-shaped rotating part.

[0026] In some embodiments, the gas source is a blast furnace compressor.

[0027] Compared with the prior art, the belt conveyor mechanism proposed in this application sets up a purging pipe and an air source conveying assembly on one side of the return roller. The purging area of ​​the purging pipe is set opposite to the belt on the outside of the return roller. The high-pressure airflow blown out of the purging area purifies the belt, so that the dust in the cracks or grooves of the belt is blown away, avoiding the belt from carrying dust. This effectively solves the problem of difficult removal of powder in the belt gaps. Attached Figure Description

[0028] Figure 1This is a schematic diagram of the structure of an embodiment of this application;

[0029] Figure 2 This is a schematic diagram from the structural side view of an embodiment of this application;

[0030] Figure 3 This is a schematic diagram of the limiting kit structure according to an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the fixed base structure according to an embodiment of this application.

[0032] Figure label:

[0033] 10. Return roller;

[0034] 20. Belt;

[0035] 30. Purge fittings; 31. Purge area;

[0036] 40. Air supply delivery assembly; 41. Delivery pipe fittings; 42. Pneumatic solenoid valve; 43. First connecting component; 44. Second connecting component; 45. Bypass pipe; 46. Solenoid valve air supply connection pipe; 47. Main valve; 48. Bypass valve;

[0037] 50. Fixed base; 51. Rotating through hole; 52. Limiting hole; 53. Supporting component; 54. Positioning mark point;

[0038] 60. Limiting kit; 61. Rotating part; 611. Arc-shaped scale. Detailed Implementation

[0039] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0040] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0041] In the material handling system of a blast furnace, belt conveyors serve as the primary transport tool, responsible for conveying raw materials such as coke, sinter, pellets, and raw ore from storage silos to the blast furnace. However, during transportation, these materials generate a large amount of fine powder, which easily adheres to the working surface of the belt conveyor.

[0042] When the conveyor belt returns after completing its transport task (i.e., the return section), the adhering powder will fall onto the floor of the conveyor belt corridor as the belt moves, accompanied by dust, which seriously affects the working environment and workers' health. Currently, manual cleaning is mostly used for regular cleaning, but manual cleaning is time-consuming, affects the production rhythm, and requires frequent entry into the conveyor belt corridor, resulting in a harsh working environment;

[0043] In particular, due to long-term use, belts will develop fine cracks, grooves, or pits on their surface. Powder can easily get trapped in these cracks, grooves, or pits. Especially when the belt passes through the return roller, the cracks, cracks, or pits are extended by the outer contour of the return roller, causing the powder in the cracks, cracks, or pits to fall into the corridor.

[0044] like Figure 1-4 As shown, in order to solve the above problems, this application proposes a belt conveyor mechanism 20, including: a return roller 10, a belt 20, a purging pipe 30, and an air source conveying assembly 40;

[0045] The belt 20 is sleeved on the outside of the return roller 10; the purging pipe 30 is spaced apart from the return roller 10 and located on one side of the return roller 10. The purging pipe 30 includes a purging area 31, which is opposite to the belt 20; the air source delivery assembly 40 includes an inlet end and an outlet end. The inlet end is used to connect to the air source, and the outlet end is connected to the purging pipe 30.

[0046] Understandably, the return roller 10 is installed on the belt 20 conveyor mechanism to support the return section of the belt 20. It can be installed at the end of the belt 20 conveyor line so that the belt 20 can bypass the roller and return to the starting point after completing the transport task.

[0047] The purging pipe 30 can be made of PVC material, which, compared to metal, will not damage the belt 20 during disassembly, assembly, and use. The purging pipe 30 is positioned along the running direction of the belt 20 on one side of the return roller 10, with a gap of 10-30mm between them. The purging pipe 30 is used to spray high-pressure airflow onto the surface of the belt 20, utilizing the impact and shearing force of the airflow to remove powder. The purging area 31 can cover the gap area of ​​the belt 20, spraying high-pressure airflow onto the surface of the belt 20 to remove powder using the impact and shearing force of the airflow. The purging area 31 can be a multi-hole nozzle or a slit nozzle, which can enhance the impact force of the airflow.

[0048] The inlet end of the gas supply assembly 40 is connected to the compressed air system. This mechanism is used in the blast furnace material handling system. The gas source can be the blast furnace compressor, so there is no need to introduce a new gas source. The outlet end is connected to the purging pipe 30 to supply compressed air.

[0049] During operation, after the belt 20 completes its transport task, it passes through the return roller 10. As it passes through the return roller 10, any cracks, grooves, or other defects, the dust inside is exposed. At this point, the air supply assembly 40 sends compressed air into the blowing pipe 30. The blowing area 31 of the blowing pipe 30 corresponds to the outer side of the belt 20 on the return roller 10. High-pressure airflow is sprayed onto the surface of the belt 20 through nozzles or slits forming the blowing area 31. The airflow obliquely impacts the surface of the belt 20, loosening and peeling away the dust embedded in the gaps. The blown-off dust is collected by a dust collection hopper below the corridor. A dust suction device can also be installed above the return roller 10. This device creates negative pressure to suck in the dust and prevent secondary dust generation. The oblique impact of the airflow on the surface of the belt 20 causes the airflow to flow along the surface of the belt 20, creating a shearing effect that peels away the dust embedded in the gaps.

[0050] The belt conveyor mechanism proposed in this application provides a purging pipe 30 and an air source conveying assembly 40 on one side of the return roller 10. The purging area 31 of the purging pipe 30 is positioned opposite to the belt 20 on the outer side of the return roller 10. The high-pressure airflow blown from the purging area 31 purifies the belt 20, cleaning the dust in the cracks or grooves of the belt 20 and preventing the belt 20 from carrying dust. This effectively solves the problem of difficult removal of powder from the gaps in the belt 20.

[0051] In some embodiments, the length of the purging tube 30 is greater than or equal to the length of the return roller 10; the purging tube 30 is provided with a plurality of air holes spaced apart along its length, and the plurality of air holes form a purging area 31.

[0052] Understandably, in order for the blowing pipe 30 to cover the entire working surface of the belt 20, it extends along the width direction of the belt 20. The pipe is installed on one side of the return roller 10 and maintains a certain distance from it (usually 10-30mm) to avoid interfering with the operation of the belt 20. Multiple air holes are evenly distributed on the blowing pipe 30 to form a continuous blowing area 31. The air holes can be designed as circular nozzles, slit openings, or multi-angle inclined nozzles to enhance the airflow impact and cleaning effect. The spray direction can be perpendicular or inclined to the surface of the belt 20, which can improve the ability to remove dust from gaps.

[0053] In some embodiments, the axial direction of the air blowing hole is at an angle to the extension direction of the belt 20, the angle being greater than or equal to 120° and less than or equal to 150°.

[0054] Understandably, compared to blowing perpendicular to the surface of belt 20, the cleaning effect can be enhanced by changing the angle of the airflow. When belt 20 extends horizontally, the angle between the axis of the air outlet and the direction of extension is at most 150°. This causes the airflow to tilt upwards and impact the fine cracks on the surface of belt 20, avoiding direct impact and creating a reverse impact force (i.e., the nozzle points in the opposite direction of belt 20's movement), resulting in dust becoming firmly embedded and difficult to remove. Similarly, if belt 20 extends at a 15° or 30° angle relative to the horizontal wind direction, the axis of the air outlet remains unchanged, and the angles between them are 135° or 120° respectively.

[0055] Similarly, if the extension direction of belt 20 remains unchanged, the angle between the axis of the air blowing hole and the extension direction of belt 20 can be adjusted by adjusting the tilt angle of the blowing pipe 30, so that it can adapt to belt 20 transmission mechanisms with different tilt angles.

[0056] In some embodiments, the air supply delivery assembly 40 includes a delivery pipe 41, one end of which is connected to the purging pipe 30 and the other end is used to connect to an air source; a pneumatic solenoid valve 42 is disposed on the delivery pipe 41 and is used to control the on / off state of the delivery pipe 41.

[0057] Understandably, one end of the conveying pipe 41 is connected to the purging pipe 30 to deliver compressed air to the purging area 31, and the other end is connected to the air source system. Since this mechanism is applied to the blast furnace material conveying system, the air source can be the blast furnace compressor, and there is no need to introduce a new air source. The other end connected to the air source can be a flexible hose, which can be bent according to the site space layout so that the conveying pipe 41 is connected to the air source.

[0058] The pneumatic solenoid valve 42 is installed on the delivery pipe 41 and serves as the core component for controlling the gas flow. It receives signals from the control system (such as a PLC or timer) to control the start and stop of the purging action.

[0059] When belt 20 is running, the solenoid valve is triggered to open, allowing air to enter the purging pipe 30 through the conveying pipe 41. High-pressure airflow is ejected from the air blowing hole to clean the dust on the surface and in the gaps of belt 20. If belt 20 is stopped, the control system sends a shutdown signal, and the solenoid valve cuts off the air supply.

[0060] In some embodiments, the air supply delivery assembly 40 further includes: a first connecting member 43, which communicates with the delivery pipe 41 and is located on the side of the pneumatic solenoid valve 42 near the delivery pipe 41;

[0061] The second connecting member 44 is connected to the conveying pipe 41 and is located on the side of the pneumatic solenoid valve 42 away from the conveying pipe 41.

[0062] The bypass pipe 45 is connected at both ends to the first connecting member 43 and the second connecting member 44 respectively, and the bypass pipe 45 is also equipped with a bypass valve 48.

[0063] Understandably, to enhance flexibility, a first connecting member 43, a second connecting member 44, and a bypass pipe 45 were added, and a bypass valve 48 was installed on the bypass pipe 45. The first connecting member 43 is connected to the delivery pipe 41 and is located on the side of the pneumatic solenoid valve 42 near the delivery pipe 41, providing an access point so that the bypass pipe 45 can be connected to a part of the main air circuit.

[0064] The second connecting piece 44 is also connected to the delivery pipe 41, but is located on the side of the pneumatic solenoid valve 42 away from the delivery pipe 41; as another access point, it allows the bypass pipe 45 to be connected to another part of the main air path.

[0065] The bypass line 45 is connected at both ends to the first connecting member 43 and the second connecting member 44, respectively. Under normal circumstances, the bypass line 45 is closed. However, under specific conditions (such as maintenance of the pneumatic solenoid valve 42 or in an emergency), the bypass valve 48 can be opened to bypass the pneumatic solenoid valve 42 and continue supplying air. The bypass valve 48 is installed on the bypass line 45 and is used to control the opening and closing of the bypass line 45. When maintenance is required or when the pneumatic solenoid valve 42 malfunctions, the bypass valve 48 can be opened to ensure the continuity of airflow and avoid the shutdown of the entire system.

[0066] The first connecting member 43 is a three-way valve with port A1, port B1 and port C1. Port A1 is used to connect to the external air source input end, port B1 is used to connect to the purging pipe 31, and port C1 is used to connect to the bypass pipe 45.

[0067] The second connecting component 44 is a four-way valve with ports A2, B2, C2, and D. Port A2 is used to connect to the output end of the pneumatic solenoid valve 42; port B2 is used to connect to the direction of the purging pipe; port C2 is used to connect to the bypass pipe 48; and port D can be connected to the main valve 47.

[0068] In some embodiments, the air supply assembly 40 further includes a solenoid valve air supply connecting pipe 46, with both ends connected to a pneumatic solenoid valve and a second connecting member 44 respectively; and a main valve 47, which is located on the side of the second connecting member 44 away from the pneumatic solenoid valve.

[0069] Understandably, the solenoid valve air supply connecting pipe 46, serving as the connection channel between the pneumatic solenoid valve 42 and the second connecting member 44, provides compressed air to the pneumatic solenoid valve 42, enabling it to perform the switching action. Otherwise, even if the pneumatic solenoid valve 42 is energized, without an air supply, the air circuit control function cannot be achieved.

[0070] In some embodiments, a mounting base 50, a purging pipe 30, and an air supply delivery assembly are disposed on the mounting base 50;

[0071] The limiting kit 60 is connected to the fixed base 50, and the purging tube 30 and the delivery tube 41 are inserted in the limiting kit 60.

[0072] Understandably, a fixing seat 50 and a limiting kit 60 are provided to ensure the effective positioning of the purging pipe fitting 30 and the air supply delivery assembly 40 and to ensure their stability and firmness during operation.

[0073] The mounting base 50 can be installed on the frame, bracket, or ground of the belt conveyor mechanism 20 as a support platform for fixing the purging pipe 30 and the air supply delivery assembly 40 (such as the delivery pipe 41, pneumatic solenoid valve 42, etc.). It can be made of metal materials (such as stainless steel or carbon steel) and has good strength and corrosion resistance; the fixing method can be bolted connection, welding, or snap-fit ​​structure, which is convenient for installation and disassembly.

[0074] The limiting kit 60 is fixedly connected to the fixing base 50, typically installed using screws, slots, or other methods. It has through holes or guide grooves through which the purge pipe 30 and the delivery pipe 41 pass, providing axial limiting and radial constraint to the pipes and preventing displacement due to vibration or air pressure impact. The limiting kit 60 can be an annular component with an open inner ring for the purge pipe 30 and the delivery pipe 41 to pass through. To further ensure secure insertion, a rubber gasket can be installed along the inner ring.

[0075] The limiting kit 60 restricts the degree of freedom of the pipe fitting, reducing the risk of displacement caused by vibration.

[0076] In some embodiments, the limiting kit 60 is rotatably connected to the fixed base 50; the fixed base 50 is provided with a rotating through hole 51 at the end near the limiting kit 60; an arc-shaped rotating part 61 is provided on the outer periphery of the limiting kit 60, and the arc-shaped rotating part 61 passes through the rotating through hole 51, so that the limiting kit 60 can rotate along the rotating through hole 51.

[0077] Understandably, due to the different operating conditions of the belt 20, the dust adhesion, or the different installation positions of the equipment, it is necessary to dynamically adjust the spray angle of the blowing pipe 30 to ensure that the airflow can accurately act on the surface of the belt 20 and improve cleaning efficiency.

[0078] The fixed base 50 is provided with a rotating through hole 51 at one end near the limiting kit 60. The through hole has an arc or semi-circular outline and is used to accommodate the rotating part 61 of the limiting kit 60. The limiting kit 60 and the fixed base 50 are connected by a rotating connection, so that it can rotate around the axis of the rotating through hole 51 on the fixed base 50.

[0079] The outer side of the limiting kit 60 is provided with an arc-shaped rotating part 61. The arc-shaped rotating part 61 is semi-circular or arc-shaped, with its two ends fixedly connected to the outer periphery of the limiting kit 60, and the remaining part leaving a gap from the outer periphery of the limiting kit 60, forming a hollow structure, as shown in the figure. Figure 3 As shown, the hollow structure facilitates installation into the rotating through hole 51 of the fixing base 50. The arc-shaped rotating part 61 can be clearance-fitted with the rotating through hole 51, allowing for flexible rotation. By using the arc-shaped rotating part 61 to pass through the rotating through hole 51, a rotating pair is formed between the arc-shaped rotating part 61 and the rotating through hole 51, allowing the limiting kit 60 to rotate within a certain angle range.

[0080] When the limiting kit 60 rotates, the purge pipe 30 and the delivery pipe 41 fixed inside it rotate synchronously to maintain the consistency of the air path and nozzle direction; after adjustment, the limiting kit 60 can be locked at the required angle by the positioning pin or the locking nut.

[0081] In some embodiments, the end of the fixing base 50 near the limiting kit 60 is provided with a limiting hole 52, which communicates with the rotating through hole 51; it also includes a pusher 53, a positioning mark 54, and an arc-shaped scale 611. One end of the pusher 53 passes through the limiting hole 52 and is used to push against the arc-shaped rotating part 61; the positioning mark 54 is provided at the position of the fixing base 50 near the limiting hole 52; and the arc-shaped scale 611 is provided on the surface of the arc-shaped rotating part 61.

[0082] Understandably, this is necessary for precise adjustment and positioning of the purging pipe fitting 30. A rotating through-hole 51 is provided at the end of the fixed base 50 near the limiting assembly 60 to accommodate the arc-shaped rotating part 61 of the limiting assembly 60, allowing for its rotational freedom. A limiting hole 52 is provided, connecting the limiting hole 52 and the rotating through-hole 51, for inserting a stop 53 to achieve angle locking. The stop 53 can be a locating pin or a locking nut. A positioning mark 54 is provided near the limiting hole 52 as a reference for angle adjustment.

[0083] The limiting kit 60 has an arc-shaped rotating part 61 on its outer periphery, which passes through the rotating through hole 51 of the fixed base 50, and has an arc-shaped scale 611 on its surface to display the current rotation angle.

[0084] One end of the abutment 53 passes through the limiting hole 52 of the fixed base 50, and the other end abuts against the surface of the arc-shaped rotating part 61 of the limiting kit 60. The locking and releasing of the limiting kit 60 can be achieved by tightening or loosening the abutment 53, which can be achieved by mechanical means such as bolts or locking pins.

[0085] The positioning mark 54 is located on the fixed base 50 near the limiting hole 52, serving as the 0° reference point. The arc-shaped scale 611 is set on the surface of the arc-shaped rotating part 61 of the limiting kit 60, and is evenly distributed along the rotation trajectory. When used together, the two can achieve accurate angle reading and repeatable positioning.

[0086] In some embodiments, the gas source is a blast furnace compressor. It is understood that this mechanism is applied to a blast furnace material handling system, where the gas source can be a blast furnace compressor, eliminating the need to introduce a new gas source.

[0087] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0088] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0089] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0090] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A belt conveying mechanism, characterized by, include: Return roller; A belt is fitted over the outside of the return roller; A purging pipe is spaced apart from the return roller and located on one side of the return roller. The purging pipe includes a purging area, which is disposed opposite to the belt. A gas delivery assembly includes an inlet end, an outlet end, and a delivery pipe. The inlet end is connected to a gas source, the outlet end is connected to the purging pipe, and one end of the delivery pipe is connected to the purging pipe, while the other end is connected to the gas source. The fixed base, the purging pipe fitting and the air source delivery assembly are disposed on the fixed base; A limiting kit is provided, which is connected to the fixed base, and the purging tube and the conveying tube are inserted through the limiting kit.

2. The belt conveyor mechanism according to claim 1, characterized in that, The length of the purging pipe is greater than or equal to the length of the return roller; The purging pipe is provided with a plurality of air holes spaced apart along its length, and the plurality of air holes form the purging area.

3. The belt conveyor mechanism according to claim 2, characterized in that, The air inlet has an angle between its axial direction and the extension direction of the belt, the angle being greater than or equal to 120° and less than or equal to 150°.

4. The belt conveyor of claim 1, wherein, The gas supply delivery assembly includes: A pneumatic solenoid valve is installed on the conveying pipe and is used to control the on / off state of the conveying pipe.

5. The belt conveyor of claim 4, wherein, The gas supply delivery assembly further includes: The first connecting member is connected to the conveying pipe and is located on the side of the pneumatic solenoid valve closer to the conveying pipe. The second connecting member is connected to the conveying pipe and is located on the side of the pneumatic solenoid valve away from the conveying pipe. A bypass pipeline is connected at both ends to the first connecting member and the second connecting member, respectively, and the bypass pipeline is also equipped with a bypass valve.

6. The belt conveyor of claim 5, wherein, The gas supply delivery assembly further includes: The air supply connecting pipe for the solenoid valve is connected at both ends to the pneumatic solenoid valve and the second connecting component, respectively. The main valve is located on the side of the second connecting member away from the pneumatic solenoid valve.

7. The belt conveyor mechanism according to claim 1, characterized in that, The limiting assembly is rotatably connected to the fixed base; The end of the fixing base near the limiting kit is provided with a rotating through hole; The outer periphery of the limiting kit is provided with an arc-shaped rotating part, which passes through the rotating through hole, so that the limiting kit can rotate along the rotating through hole.

8. The belt conveyor mechanism according to claim 7, characterized in that, The fixed base is provided with a limiting hole near the end of the limiting kit, and the limiting hole communicates with the rotating through hole; A stopper, one end of which passes through the limiting hole and is used to stop the arc-shaped rotating part; A positioning marker is provided on the fixed base near the limiting hole; The arc-shaped scale is disposed on the surface of the arc-shaped rotating part.

9. The belt conveyor mechanism according to any one of claims 1-8, characterized in that, The gas source is a blast furnace compressor.

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