A multi-point discharge device for a belt conveyor and a method of laying

Abstract

This invention proposes a multi-point unloading device and its deployment method for belt conveyors, comprising N fixed unloading vehicles (N≥1) arranged at multiple intervals along a horizontal section of the belt conveyor. Each fixed unloading vehicle includes a frame, an unloading rack, an unloading belt, an unloading hopper, an unloading roller, and a steering roller. The unloading rack is inclined relative to the frame. The unloading hopper is located at the top of the frame, and the unloading roller is located at the unloading end of the unloading rack, corresponding to the inlet of the unloading hopper. The steering roller is located at the bottom of the frame, corresponding to the dropping end of the unloading rack of the fixed unloading vehicle. The unloading belt is laid along the unloading rack and is turned by winding around the unloading roller and the steering roller. This invention achieves continuous arrangement of fixed unloading vehicles, is lightweight, can be used for fixed-point unloading at a specific point, is easy to operate, has high unloading accuracy, and a low failure rate.

Description

Technical Field

[0001] This application relates to the technical field of unloading devices, and more specifically, to a multi-point unloading device and its deployment method for belt conveyors. Background Technology

[0002] The unloading device in the middle of a belt conveyor typically uses a plow-type unloader or a mobile unloading cart. The advantage of a plow-type unloader is its light weight, but its disadvantages include belt wear and a tendency for material spillage and leakage. The advantages of a mobile unloading cart are its mobility, allowing for multi-point unloading without damaging the belt or causing spillage or leakage. However, its disadvantages include the need for a traveling mechanism and rails, its heavy weight, complex operation, poor precision in fixed-point unloading, poor dust removal, inability to use belt covers, and in most cases, its unsuitability for direct use in open-air environments, requiring a belt conveyor corridor.

[0003] Plow-type unloaders are generally only used in low-frequency applications due to their drawbacks such as easy belt wear, easy spillage, and easy leakage, and are gradually being phased out of the market. Mobile unloading vehicles can perfectly overcome the disadvantages of plow-type unloaders and have a good market prospect. However, due to their large weight and complex supporting facilities, their practicality and economy are not as good as the lightweight fixed unloading vehicle introduced in this invention in situations with few unloading points or in certain specific situations. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a multi-point unloading device and a deployment method for belt conveyors, which can realize multi-point fixed unloading according to work requirements.

[0005] The embodiments of this application are implemented as follows:

[0006] This application provides a multi-point unloading device for a belt conveyor, characterized in that it includes N fixed unloading vehicles arranged at multiple intervals along a horizontal section of the belt conveyor, where N≥1. Each fixed unloading vehicle includes a frame, an unloading rack, an unloading belt, an unloading hopper, an unloading roller, and a steering roller. The unloading rack is inclined relative to the frame. The unloading hopper is located at the top of the frame. The unloading roller is located at the unloading end of the unloading rack and is positioned corresponding to the inlet of the unloading hopper. The steering roller is located at the bottom of the frame and is positioned corresponding to the dropping end of the unloading rack of the fixed unloading vehicle. The unloading belt is laid along the unloading rack and is steered by wrapping around the unloading roller and the steering roller.

[0007] In some alternative implementations, the discharge hopper includes an upper discharge hopper and a lower discharge hopper, wherein the lower discharge hopper is provided with a flap valve.

[0008] In some alternative implementations, a dust cover is provided on the unloading rack corresponding to the position of the unloading belt.

[0009] In some alternative implementations, the upper unloading hopper is welded to the dust collection pipe.

[0010] A method for deploying a multi-point unloading device for a belt conveyor, characterized by comprising the following steps:

[0011] Step a, determine the layout parameters of N fixed unloading vehicles:

[0012] Including the tilt angle θ of the unloading rack of the Nth fixed unloading car. N By default, the unloading rack of the first fixed unloading car is set horizontally, and the wrap angle α of the steering roller is... N The horizontal distance L1 between the unloading roller and the steering roller, the distance L2 between the unloading roller and the center line of the unloading hopper, the distance L3 between the unloading points of adjacent fixed unloading vehicles, the minimum vertical height H from the top of the unloading roller to the bottom of the steering roller, and the installation height difference Δh between the steering roller of the Nth fixed unloading vehicle and the steering roller of the first fixed unloading vehicle. N Horizontal length of unloading rack Lm N ;

[0013] Step b, determine the values ​​of each deployment parameter:

[0014] The tilt angle of the unloading rack is in the range of 0° < θ N ≤16°, the wrap angle α of the steering roller N ≥120°, adjusted by adjusting the horizontal distance L1 between the unloading drum and the steering drum. The distance L2 between the unloading drum and the center line of the unloading hopper is a constant value under the same belt width. The distance L3 between the unloading points of adjacent fixed unloading vehicles is determined according to the actual situation. The minimum vertical height H is determined by the diameter of the unloading drum and the steering drum, as well as the minimum height of the flap valve, and is a constant value under the same belt width. The installation height difference Δh N From L1, L2 and tilt angle θ N-1 The horizontal length Lm of the unloading rack was determined together. N Based on the fixed unloading car position and H, Δh N θ N A joint decision.

[0015] In some alternative implementations, the tilt angle θ of the unloading rack N The following formula can be used to calculate:

[0016]

[0017] In some alternative implementations, the installation height difference Δh N When N = 1, Δh1 = 0; when N = 2, 3…N, it can be calculated using the following formula:

[0018] Δh N= (L1+L2)*tanθ N-1 .

[0019] In some alternative implementations, the horizontal length Lm of the unloading rack is L1+L3 from the first fixed unloading car to the (N-1)th fixed unloading car, and the horizontal length Lm of the unloading rack of the Nth fixed unloading car is... N The following formula can be used to calculate:

[0020]

[0021] The beneficial effects of this application are: This invention provides a multi-point unloading device and layout method for belt conveyors, which can achieve continuous arrangement, save space and save costs; the fixed unloading car unloads at fixed points, which is easy to operate, has high unloading accuracy, low failure rate, and light weight. The fewer unloading points, the greater the advantage compared to the mobile unloading car; compared with the mobile unloading car, the fixed unloading car can effectively reduce the clearance height of the belt conveyor or allow for open-air layout, thereby reducing civil engineering costs. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0024] Figure 2 for Figure 1 View from direction A;

[0025] Figure 3 This is a schematic diagram illustrating the application of the fixed unloading vehicle in the two-point unloading of a belt conveyor according to an embodiment of this application.

[0026] Figure 4 This is a schematic diagram illustrating the application of the fixed unloading vehicle in the three-point unloading of a belt conveyor according to an embodiment of this application;

[0027] Figure 5 This is a schematic diagram illustrating the application of the fixed unloading vehicle in the four-point unloading of the belt conveyor according to an embodiment of this application. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The features and performance of this application will be further described in detail below with reference to the embodiments.

[0036] like Figure 1 As shown, the present invention proposes a multi-point unloading device for a belt conveyor, comprising N fixed unloading vehicles arranged at multiple intervals along the horizontal section of the belt conveyor, where N≥1. Each fixed unloading vehicle includes a frame 1, an unloading rack 2, an unloading belt 3, an unloading hopper 4, an unloading roller 5, and a steering roller 6. The unloading rack is inclined relative to the frame, the unloading hopper is located at the top of the frame, the unloading roller is located at the unloading end of the unloading rack and is positioned corresponding to the inlet of the unloading hopper, and the steering roller is located at the bottom of the frame and is positioned corresponding to the dropping end of the unloading rack of the fixed unloading vehicle. The unloading belt is laid along the unloading rack and is steered by winding around the unloading roller and the steering roller.

[0037] In some alternative implementations, the discharge hopper includes an upper discharge hopper and a lower discharge hopper, with a flap valve installed in the lower discharge hopper.

[0038] In some optional implementations, a dust cover 7 is installed on the unloading rack corresponding to the unloading belt position; the upper unloading hopper is welded to the dust collection pipe 8 to reduce dust suppression. Compared with the dust collection of the ventilation duct matched with the mobile unloading car, the dust removal effect is better and more cost-effective. In certain specific environments, the light-duty fixed unloading car can effectively reduce the headroom height of the belt conveyor or be arranged in the open air, reducing civil engineering costs.

[0039] The above-mentioned method for arranging the multi-point unloading device includes the following steps:

[0040] Step a, determine the layout parameters of N fixed unloading vehicles:

[0041] Including the tilt angle θ of the unloading rack of the Nth fixed unloading car. N By default, the unloading rack of the first fixed unloading car is set horizontally, and the wrap angle α of the steering roller is... NThe horizontal distance L1 between the unloading roller and the steering roller, the distance L2 between the unloading roller and the center line of the unloading hopper, the distance L3 between the unloading points of adjacent fixed unloading vehicles, the minimum vertical height H from the top of the unloading roller to the bottom of the steering roller, and the installation height difference Δh between the steering roller of the Nth fixed unloading vehicle and the steering roller of the first fixed unloading vehicle. N Horizontal length of unloading rack Lm N ;

[0042] Step b, determine the values ​​of each deployment parameter:

[0043] The tilt angle of the unloading rack is in the range of 0° < θ N ≤16°, the wrap angle α of the steering roller N ≥120°, adjusted by adjusting the horizontal distance L1 between the unloading drum and the steering drum. The distance L2 between the unloading drum and the center line of the unloading hopper is a constant value under the same belt width. The distance L3 between the unloading points of adjacent fixed unloading vehicles is determined according to the actual situation. The minimum vertical height H is determined by the diameter of the unloading drum and the steering drum, as well as the minimum height of the flap valve, and is a constant value under the same belt width. The installation height difference Δh N From L1, L2 and tilt angle θ N-1 The horizontal length Lm of the unloading rack was determined together. N Based on the fixed unloading car position and H, Δh N θ N A joint decision.

[0044] In some alternative implementations, the tilt angle θ of the unloading rack N The following formula can be used to calculate:

[0045]

[0046] In some alternative implementations, the installation height difference Δh N When N = 1, Δh1 = 0; when N = 2, 3…N, it can be calculated using the following formula:

[0047] Δh N = (L1+L2)*tanθ N-1 .

[0048] In some alternative implementations, the horizontal length Lm of the unloading rack is L1+L3 from the first fixed unloading car to the (N-1)th fixed unloading car, and the horizontal length Lm of the unloading rack of the Nth fixed unloading car is... N The following formula can be used to calculate:

[0049]

[0050] The light-duty fixed unloading vehicle can perform iterative calculations according to the above formula to achieve continuous arrangement of light-duty fixed unloading vehicles. This allows the steering roller of the previous light-duty fixed unloading vehicle and the unloading roller of the next light-duty fixed unloading vehicle to cooperate with each other in the most reasonable way, straighten the belt, reduce the arc segment, save space, and save costs.

[0051] Compared to mobile unloading vehicles, lightweight fixed unloading vehicles reduce the need for a traveling mechanism and rails. They can be used for fixed-point unloading, are easy to operate, have high unloading accuracy, low failure rate, and are lightweight, weighing approximately one-third of a comparable mobile unloading vehicle. The fewer unloading points, the greater the advantages compared to mobile unloading vehicles.

[0052] Example 1

[0053] Figure 3 This is a schematic diagram of the application of a light-duty fixed unloading vehicle in two-point unloading of a belt conveyor. The belt conveyor width is 800mm and L2 is 700mm. According to actual application, when the flap valve of the lower unloading hopper of the light-duty fixed unloading vehicle is normally switched to unload, the minimum vertical height H from the top of the unloading drum to the bottom of the deflector drum is 1900mm, and L1 is 1600mm. At this time, the wrap angle α1 of the deflector drum is 152°>120°, and the height H is determined. At this time, the larger θ1 is, the shorter the horizontal length of the unloading frame and the smaller the weight. Therefore, θ1 is 16°. According to the formula Lm1=H / tanθ1, the horizontal length of the unloading frame is about 6600mm.

[0054] Example 2

[0055] Figure 4 This diagram illustrates the application of a light-duty fixed unloading vehicle in three-point unloading on a belt conveyor. The belt conveyor width is 800mm, and L2 is 700mm. Based on actual application measurements, when the lower unloading hopper flap valve of the light-duty fixed unloading vehicle is normally switching for unloading, the minimum vertical height H from the top of the unloading drum to the bottom of the redirecting drum is 1900mm, and L1 is 1600mm. At this time, the wrap angle α1 of the redirecting drum is 152° > 120°. Based on the actual site conditions, the distance between adjacent unloading points is L3 = 8000mm. Calculated using the formula, the tilt angle θ1 of the first light-duty fixed unloading vehicle is approximately 11.2°, the height from the top of the unloading drum to the bottom of the redirecting drum is H = 1900mm, and Lm1 = L1 + L3 = 9600mm. According to the formula, Δh2≈450mm. The height from the top of the unloading roller to the bottom of the redirecting roller of the second light-duty fixed unloading vehicle is H+Δh2=2350mm. The larger θ2 is, the shorter the horizontal length of the unloading frame and the smaller the weight. θ2 is taken as 16°. Lm2=(H+Δh2) / tanθ2. The horizontal length of the unloading frame is about 8200mm.

[0056] Example 3

[0057] Figure 5This diagram illustrates the application of a light-duty fixed unloading vehicle in four-point unloading on a belt conveyor. The belt conveyor width is 800mm, and L2 is 700mm. Based on actual application measurements, when the lower unloading hopper flap valve of the light-duty fixed unloading vehicle is normally switched for unloading, the minimum vertical height H from the top of the unloading drum to the bottom of the redirecting drum is 1900mm, and L1 is 1600mm. At this time, the wrap angle α1 of the redirecting drum is 152° > 120°. According to the actual site conditions, the distance between adjacent unloading points is L3 = 8000mm. Calculated using the formula, the tilt angle θ1 of the first light-duty fixed unloading vehicle is ≈11.2°, the height from the top of the unloading drum to the bottom of the redirecting drum is H = 1900mm, and Lm1 = L1 + L3 = 9600mm. Based on the formula, Δh2≈450mm. The height from the top of the unloading roller to the bottom of the steering roller of the second light-duty fixed unloading vehicle is H+Δh2=2350mm. Based on the formula, the tilt angle of the third light-duty fixed unloading vehicle is θ2≈13.8°, and Lm2=L1+L3=9600mm. Based on the formula, Δh3≈560mm. The height from the top of the unloading roller to the bottom of the steering roller of the third light-duty fixed unloading vehicle is H+Δh3=2460mm. The larger θ3 is, the shorter the horizontal length of the unloading frame and the smaller the weight. θ3 is taken as 16°, Lm3=(H+Δh3) / tanθ3, and the length of the unloading frame is approximately 8600mm.

[0058] The present invention and its embodiments have been described above through iterative calculations of continuous arrangement of light-duty fixed unloading vehicles in practical applications. This description is not restrictive, and the embodiments shown in the accompanying drawings are only one of the embodiments of the present invention. The actual application is not limited to this. In conclusion, if those skilled in the art are inspired by this description and design a similar structural arrangement to the technical solution without departing from the spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. A method for arranging a multi-point unloading device for a belt conveyor, characterized in that, The multi-point unloading device includes N fixed unloading cars, N≥1, arranged at multiple intervals along the horizontal section of the belt conveyor. Each fixed unloading car includes a frame, an unloading rack, an unloading belt, an unloading hopper, an unloading roller, and a steering roller. The unloading rack is inclined relative to the frame. The unloading hopper is located at the top of the frame. The unloading roller is located at the unloading end of the unloading rack, corresponding to the inlet of the unloading hopper. The steering roller is located at the bottom of the frame, corresponding to the dropping end of the unloading rack of the fixed unloading car. The unloading belt is laid along the unloading rack and achieves steering by wrapping around the unloading roller and the steering roller. The unloading hopper includes an upper unloading hopper and a lower unloading hopper, and the lower unloading hopper is equipped with a flap valve. The arrangement method includes the following steps: Step a, determine the layout parameters of N fixed unloading vehicles: Including the tilt angle θ of the unloading rack of the Nth fixed unloading car. N The wrap angle α of the steering roller N The horizontal distance L1 between the unloading roller and the steering roller, the distance L2 between the unloading roller and the center line of the unloading hopper, the distance L3 between the unloading points of adjacent fixed unloading vehicles, the minimum vertical height H from the top of the unloading roller to the bottom of the steering roller, and the installation height difference Δh between the unloading roller of the Nth fixed unloading vehicle and the unloading roller of the first fixed unloading vehicle. N Horizontal length of unloading rack Lm N ; Step b, determine the values ​​of each deployment parameter: The tilt angle of the unloading rack is in the range of 0° < θ N ≤16°, the wrap angle α of the steering roller N ≥120°, adjusted by adjusting the horizontal distance L1 between the unloading roller and the steering roller. The distance L2 between the unloading roller and the center line of the unloading hopper is a constant value under the same belt width. The distance L3 between the unloading points of adjacent fixed unloading vehicles is determined according to the actual situation. The minimum vertical height H is determined by the diameter of the unloading roller and the steering roller, as well as the minimum height of the flap valve, and is a constant value under the same belt width. When N=1, Δh1=0. When N=2, 3…N, the installation height difference Δh N From L1, L2 and tilt angle θ N-1 The horizontal length Lm of the unloading rack was determined together. N Based on the fixed unloading car position and H, Δh N θ N Determined jointly; tilt angle θ N The following formula can be used to calculate: 。 2. The method for arranging a multi-point unloading device for a belt conveyor according to claim 1, characterized in that, The installation height difference Δh N When N=2, 3…N, the result can be calculated using the following formula: 。 3. The method for arranging a multi-point unloading device for a belt conveyor according to claim 2, characterized in that, The horizontal length of the unloading rack is L1+L3 for the first to the (N-1)th fixed unloading car, and the horizontal length of the unloading rack for the Nth fixed unloading car is Lm. N The following formula can be used to calculate: , where θ N =16°.

4. A method for arranging a multi-point unloading device for a belt conveyor according to claim 1 or 3, characterized in that, The unloading rack is equipped with a dust cover corresponding to the position of the unloading belt.

5. A method for arranging a multi-point unloading device for a belt conveyor according to claim 1 or 3, characterized in that, The upper unloading hopper is welded to the dust removal pipe.

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