Gravity-type double-sided plow type unloader for coal

Abstract

We provide a gravity-type double-sided plow type unloader for coal. The system includes a fixed lower support roller group (1), a coal plow-type unloader blade group (2), an electric push rod (7), a horizontal support base (8), and a vertical support column (9). The horizontal support base is attached to the top of the vertical support column, the electric push rod is attached to the horizontal support base, and the coal plow-type unloader blade group is rotatably connected to the vertical support column. The double-sided coal plow-type unloader further includes a lifting chain (4) and a pulley group (5). The pulley group is attached to the horizontal support base, and one end of the lifting chain is connected to the output end of the electric push rod and the other end is connected to the coal plow-type unloader blade group via the pulley group. The lifting chain is extended or retracted via the electric push rod to pull the coal plow-type unloader blade group and lower or raise it. Compared to prior art, this system has advantages such as accurate positioning and improved safety and stability of the equipment.

Description

[Technical Field]

[0001] The present invention relates to the field of coal plow unloaders, and more particularly to gravity-type double-sided coal plow unloaders. [Background technology]

[0002] As a device for unloading bulk materials from a belt conveyor, coal plow-type unloaders are widely used in industries such as power, metallurgy, coal, chemical, and mining, and are ideal unloading devices. During actual production, conventional coal plow-type unloaders have been found to have several problems during use, and adjusting the drop limit of the coal plow-type unloader has always been a difficult problem. For example, the coal plow board adjustment mechanism and coal plow-type unloader disclosed in utility model publication number CN220411712U include a coal plow board assembly including a fixed plate, a bottom end of which is movably connected to an adjustment plate and a main plow board, and an adjustment assembly including fixed blocks fixedly attached to the upper and lower inner ends of the fixed plate, a threaded rod rotatably connected between the two fixed blocks, and a slider threadedly connected to the outer surface of the threaded rod. By setting the adjustment assembly, the positional relationship between the main plowboard and the conveyor belt can be adjusted before the main plowboard is operated, thereby ensuring more reliable contact between the underside of the main plowboard and the upper surface of the conveyor belt.

[0003] Conventional coal plow-type unloaders are directly driven up and down by a hydraulic mechanism or a driving member such as a screw rod, and their position is adjusted. If the adjustment is too tight, the blade head of the coal plow-type unloader will constantly press against the belt, damaging the belt and affecting the lifespan of the belt conveyor. If the adjustment is too loose, coal will easily leak from the coal plow-type unloader, and the coal on the belt will not be completely unloaded. Summary of the Invention [Problem to be solved by the invention]

[0004] The purpose of this invention is to overcome the drawbacks of the prior art, reduce belt damage and coal falling, and provide a gravity-type double-sided plow-type unloader for coal that has an optimized structure.

[0005] The objective of the present invention can be achieved by the following technical solutions:

[0006] The gravity-type double-sided plow-type coal unloader includes a group of fixed lower support rollers, a group of coal plow-type unloader blades, an electric push rod, a horizontal support base, and a vertical support pillar, wherein the horizontal support base is attached to the top of the vertical support pillar, the electric push rod is attached to the horizontal support base, and the coal plow-type unloader blades are rotatably connected to the vertical support pillar. The double-sided plow-type coal unloader further includes a lifting chain and a group of pulleys, wherein the group of pulleys is attached to the horizontal support pillar, and one end of the lifting chain is connected to the output end of the electric push rod and the other end is connected to the coal plow-type unloader blades via the group of pulleys. Thus, the lifting chain is extended or retracted via the electric push rod to pull the coal plow-type unloader blades and lower or raise them.

[0007] Furthermore, the double-sided plow-type coal unloader further includes a controller and a lower position limit sensor, the controller is respectively connected to the lower position limit sensor and the electric push rod, the lower position limit sensor is attached to the horizontal support base and corresponds to the extension length of the electric push rod when the blade group of the coal plow-type unloader is pressed against the fixed lower support roller group by its own weight, and the controller controls the electric push rod to stop extending after receiving a signal from the lower position limit sensor during the process of extending the electric push rod.

[0008] Furthermore, the output end of the electric push rod is provided with a protrusion that is engaged with the lower position limit sensor.

[0009] Furthermore, the double-sided plow type coal unloader further includes a mechanical limiter fixed by an external device for limiting the lowest position of the blades of the coal plow type unloader.

[0010] Furthermore, the mechanical limiter includes a vertical fixed rod and a horizontally moving rod, the vertical fixed rod is fixed vertically by an external device, and the horizontally moving rod is fixed to the blade group of the coal plow-type unloader and protrudes toward the vertical fixed rod, and when the blade group of the coal plow-type unloader descends to the lowest position, the horizontally moving rod abuts against the vertical fixed rod to restrict its position.

[0011] Furthermore, the horizontally moving rod is located at the end of the coal plow-type unloader blades remote from the vertical support pillar.

[0012] Furthermore, a conveyor belt is supported above the fixed lower support roller group.

[0013] Furthermore, the electric push rod is mounted horizontally in a corresponding area directly above the vertical support column in the horizontal support platform.

[0014] Compared with the prior art, the present invention has the following advantages: (1) This invention changes the overall drive and positioning method of a coal plow-type unloader by eliminating components such as the intermediate frame and adjustable screw rod used to drive the push rod of a conventional coal plow-type unloader, leaving only the fixed lower roller group of the coal plow-type unloader, the coal plow-type unloader blade group, and the electric push rod, and adding a pulley group and lifting chain. The extension and retraction of the electric push rod causes the coal plow-type unloader blade group to be lowered or raised by the lifting chain, and a lower position limit sensor can be set to automatically stop the electric push rod when the coal plow-type unloader blade group reaches its lowest position. This invention primarily uses the weight of the coal plow-type unloader blade group for drive, eliminating the need for frequent adjustment of the lower limit accuracy and ensuring accurate positioning according to its own weight, making it safe and reliable and reducing the maintenance costs of the coal plow-type unloader. The most important thing is to avoid equipment failures such as wear on the blade head of the coal plow-type unloader or wear on the rubber belt of the conveyor due to excessive dropping of the coal plow-type unloader, thereby improving the safety and stability of the equipment. (2) This invention provides a mechanical limiting device at the front of the blade group of the coal plow-type unloader, which can prevent the chain of the coal plow-type unloader from falling off and subsequent equipment failure, thereby improving the safety and stability of the equipment. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a schematic diagram showing the falling state of a gravity-type double-sided plow-type coal unloader according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic diagram showing the lifting state of the gravity-type double-sided plow-type coal unloader according to the embodiment of the present invention. [Explanation of symbols]

[0016] 1. Fixed lower support roller group, 2. Coal plow-type unloader blade group, 3. Mechanical limiter, 301. Vertical fixed rod, 302. Horizontal moving rod, 4. Lifting chain, 5. Pulley group, 6. Lower position limit sensor, 7. Electric push rod, 8. Horizontal support base, 9. Vertical support column. DETAILED DESCRIPTION OF THE INVENTION

[0017] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the present invention, as generally described and illustrated in the accompanying drawings, may be arranged and designed in a variety of different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention, provided in the accompanying drawings, is not intended to limit the scope of the claimed invention, but rather to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0019] It should be noted that in the following figures, like reference numbers and letters represent like items, so that once an item is defined in one figure, it does not require further definition or explanation in subsequent figures.

[0020] In the description of the present invention, the orientations and positional relationships indicated by the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are based on the orientations and positional relationships shown in the drawings or the orientations and positional relationships in which the product of the present invention is normally placed when used. This is only for the purpose of explaining and simplifying the description of the present invention, and does not indicate or imply that the devices or elements referred to must have a specific orientation or be constructed or operate in a specific orientation, and therefore should not be understood as a limitation of the present invention.

[0021] It should be noted that the terms "first" and "second" are used for convenience of description only and cannot be understood as indicating or implying relative importance or the quantity of technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means two or more than two, unless expressly limited otherwise.

[0022] Additionally, terms such as "horizontal" and "vertical" do not necessarily mean that a member needs to be perfectly horizontal or suspended, but may be slightly tilted. For example, "horizontal" simply means that the direction is more horizontal than "vertical," and does not mean that the structure must be perfectly horizontal, but may be slightly tilted. [Example]

[0023] As shown in Figures 1 and 2, this embodiment provides a gravity-type double-sided plow-type coal unloader, which removes parts such as the intermediate frame for driving the push rods of a conventional coal plow-type unloader and the adjustable screw rod, and only leaves the fixed coal plow-type unloader lower support roller group 1, the coal plow-type unloader blade group 2, and the electric push rod 7. The overall drive type and positioning method of the coal plow-type unloader have been redesigned, the outer frame structure of the coal plow-type unloader has been redesigned, and three sets of mechanical limiters, five sets of pulley groups, four sets of lifting chains, and related spare parts have been added.

[0024] Specifically, this double-sided plow-type coal unloader includes a fixed lower support roller group 1, a coal plow-type unloader blade group 2, a lifting chain 4, a pulley group 5, an electric push rod 7, a horizontal support base 8, and a vertical support column 9. The horizontal support base 8 is attached to the top of the vertical support column 9, the electric push rod 7 is attached to the horizontal support base 8, the coal plow-type unloader blade group 2 is rotatably connected to the vertical support column 9, and the pulley group 5 is attached to the horizontal support base 8. One end of the lifting chain 4 is connected to the output end of the electric push rod 7, and the other end is connected to the coal plow-type unloader blade group 2 via the pulley group 5. The lifting chain 4 is extended or retracted via the electric push rod 7 to pull and raise the coal plow-type unloader blade group 2. The fixed lower support roller group 1 is located below the coal plow-type unloader blade group 2, and a conveyor belt is supported above the fixed lower support roller group 1.

[0025] The control method corresponding to the above structure is as follows: When coal needs to be unloaded, the electric push rod 7 is driven to extend, and the blade group 2 of the coal plow-type unloader, pulled by the lifting chain 4, falls downward by gravity. When the lifting chain 4 is in a relaxed state, the blade group 2 of the coal plow-type unloader is pressed against the fixed lower support roller group 1 by its own weight, When the unloading of the coal is completed, the electric push rod 7 is driven to retract, the lifting chain 4 pulls the blade group 2 of the coal plow-type unloader, and the blade group 2 of the coal plow-type unloader is lifted.

[0026] This means that when the blade group 2 of the coal plow-type unloader descends, the electric push rod 4 pushes it down, causing the coal plow-type unloader 2 to fall downward. When the lifting chain 4 is in a slack state, the blade group 2 of the coal plow-type unloader is pressed against the belt surface by its own weight and is in the lower limit position 6. At this time, the blade head of the coal plow-type unloader does not press too hard against the belt, so it does not damage the belt surface, and the gap with the belt is too large, so there is no large amount of coal residue. When the blade group 2 of the coal plow-type unloader is lifted, it returns to substantially the same shape as it was originally.

[0027] Preferably, the double-sided plow-type coal unloader further includes a controller and a lower position limit sensor 6, the controller is respectively connected to the lower position limit sensor 6 and the electric push rod 7, the lower position limit sensor 6 is attached to the horizontal support base 8 and corresponds to the extension length of the electric push rod 7 when the blade group 2 of the coal plow-type unloader is pressed against the fixed lower support roller group 1 by its own weight, and after the controller receives a signal from the lower position limit sensor 6 during the process of extending the electric push rod 7, it controls the electric push rod 7 to stop extending.

[0028] The output end of the electric push rod 7 is provided with a protrusion that engages with the lower position limit sensor 6 .

[0029] When a detection signal is received from the lower position limit sensor 6 during the process of driving the electric push rod 7 to extend, the driving of the electric push rod 7 is stopped.

[0030] In this solution, a lower position limit sensor 6 is provided, and when the blade group 2 of the corresponding coal plow-type unloader is pressed against the fixed lower support roller group 1 by its own weight, the corresponding electric push rod 7 is extended, and the driving of the electric push rod 7 can be automatically stopped at the corresponding position, making the control process more convenient.

[0031] The double-sided plough type coal unloader further includes a mechanical limiter 3 fixed by an external device for limiting the lowest position of the blade set 2 of the coal plough type unloader.

[0032] The mechanical limiter 3 includes a vertical fixed rod 301 and a horizontally movable rod 302, the vertical fixed rod 301 being fixed vertically by an external device, and the horizontally movable rod 302 being fixed to the blade group 2 of the coal plow-type unloader and protruding toward the vertical fixed rod 301, and when the blade group 2 of the coal plow-type unloader descends to the lowest position, the horizontally movable rod 302 abuts against the vertical fixed rod 301 to restrict its position.

[0033] The horizontally moving rod 302 is located at the end of the coal plow unloader blades remote from the vertical support post 9 .

[0034] In this solution, a mechanical position limiting device is installed at the front of the blade group 2 of the coal plow-type unloader, which prevents the chain of the coal plow-type unloader from falling off and subsequent equipment failure, thereby improving the safety and stability of the equipment.

[0035] The electric push rod 7 is mounted horizontally in a corresponding area in a horizontal support base 8 directly above a vertical support column 9 .

[0036] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes based on the concept of the present invention without any creative efforts. Therefore, any technical solution that those skilled in the art can obtain based on the concept of the present invention and on the prior art through logical analysis, reasoning, or limited experiments should fall within the scope of protection defined in the claims.

Claims

1. A gravity-type double-sided plow-type unloader for coal, comprising a group of fixed lower support rollers (1), a group of coal plow-type unloader blades (2), an electric push rod (7), a horizontal support base (8) and a vertical support pillar (9), the horizontal support base (8) is attached to the top of the vertical support pillar (9), the electric push rod (7) is attached to the horizontal support base (8), and the group of coal plow-type unloader blades (2) are rotatably connected to the vertical support pillar (9), and the coal plow-type unloader is provided with a lifting chain ( The gravity-type double-sided plow-type unloader for coal further comprises a lifting chain (4) and a pulley group (5), the pulley group (5) being attached to the horizontal support base (8), one end of the lifting chain (4) being connected to the output end of an electric push rod (7), and the other end being connected to the blade group (2) of the coal plow-type unloader via the pulley group (5), thereby extending and contracting the lifting chain (4) via the electric push rod (7) to pull and lower or raise the blade group (2) of the coal plow-type unloader.

2. 2. The gravity-type double-sided plow type coal unloader according to claim 1, further comprising: a controller and a lower position limit sensor (6), the controller is respectively connected to the lower position limit sensor (6) and the electric push rod (7), the lower position limit sensor (6) is attached to a horizontal support base (8) and corresponds to the extension length of the electric push rod (7) when the blade group (2) of the coal plow type unloader is pressed against the fixed lower support roller group (1) by its own weight, and the controller controls the electric push rod (7) to stop extending after receiving a signal from the lower position limit sensor (6) during the process of extending the electric push rod (7).

3. The gravity-type double-sided plow type coal unloader according to claim 2, characterized in that the output end of the electric push rod (7) is provided with a protrusion that is engaged with the lower position limit sensor (6).

4. The gravity-type double-sided plow-type coal unloader according to claim 1, characterized in that the double-sided plow-type coal unloader further includes a mechanical limiter (3) fixed by an external device for limiting the lowest position of the blade group (2) of the coal plow-type unloader.

5. The gravity-type double-sided plow-type coal unloader of claim 4, characterized in that the mechanical limiter (3) includes a vertical fixed rod (301) and a horizontal moving rod (302), the vertical fixed rod (301) is fixed vertically by an external device, the horizontal moving rod (302) is fixed to the group of blades (2) of the coal plow-type unloader and protrudes toward the vertical fixed rod (301), and when the group of blades (2) of the coal plow-type unloader descends to the lowest position, the vertical fixed rod (301) abuts against the horizontal moving rod (302), thereby limiting its position.

6. 6. The gravity-type double-sided plow-type unloader for coal according to claim 5, characterized in that the horizontal moving rod (302) is located at the end of the group of blades (2) of the coal plow-type unloader remote from the vertical support pillar (9).

7. 2. The gravity-type double-sided plow-type coal unloader according to claim 1, wherein a conveying belt is supported above the fixed lower support roller group (1).

8. 2. The gravity-type double-sided plow-type coal unloader according to claim 1, wherein the electric push rod (7) is mounted horizontally in a corresponding area directly above the vertical support column (9) in the horizontal support base (8).

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