Cable trough capable of preventing coal from being stuck
By designing anti-coal-jamming cable troughs at the unloading port of the cross-side-discharge scraper conveyor, and using movable baffles and drive mechanisms to automatically clear blocked coal, the problem of coal block accumulation is solved, coal conveying efficiency and equipment reliability are improved, and the risks of manual intervention and wear are reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENGZHOU COAL MINING LONGWALL FACE MASCH CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-15
AI Technical Summary
In the existing technology, the design of the unloading port of the cross-side unloading scraper conveyor can easily lead to coal accumulation or getting stuck in the transition trough and head section, affecting coal conveying efficiency, increasing equipment wear and failure risk, and manual cleaning poses safety hazards and is inefficient.
A coal-blocking cable trough is designed, including a fixed baffle assembly and a rotating shaft door assembly. The movable baffle is driven to rotate by a drive mechanism to automatically clear coal blocks stuck in the transition trough. It can adapt to coal blocks of different sizes, reduce manual intervention and equipment wear.
It achieves automated coal clearing, reduces downtime, improves production efficiency, reduces safety hazards, extends equipment life, adapts to coal blocks of different sizes, and improves the versatility of the equipment.
Smart Images
Figure CN224249285U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of coal mining, specifically relating to an anti-coal-jamming cable trough for a belt conveyor. Background Technology
[0002] Mining scraper conveyors occupy a central position in underground coal transportation. Their working principle is based on the cyclical operation of scraper chains within the chute. This mechanical motion transports coal mined from the face from the tail to the head of the conveyor in an orderly manner. Structurally, the chute structure of the mining scraper conveyor is extremely sophisticated. The tail section is responsible for the initial coal reception, the tail transition chute smoothly connects the tail to the middle chute, the middle chute bears the heavy responsibility of long-distance coal transportation, and the head transition chute cleverly guides the coal to the head. These components are tightly combined according to specific connection methods, perfectly adapting to complex and varied roadway layouts and diverse transportation needs.
[0003] End-discharge scraper conveyors unload coal directly from the end of the conveyor head into the transfer conveyor. The higher unloading height allows the coal to fall directly, reducing the risk of jamming. In contrast, cross-side-discharge scraper conveyors use an arc-shaped unloading port. During unloading, the coal must pass through this arc-shaped plate to change its direction of movement before entering the transfer conveyor. While this design helps the coal slide smoothly into the transfer conveyor, the arc-shaped plate can restrict the flow path of the coal, especially when the coal is large or the flow velocity is high. This can easily lead to coal accumulation or jamming in the head transition trough and the head section. This not only significantly reduces coal conveying efficiency but also accelerates equipment wear and increases the risk of equipment failure.
[0004] Existing solutions include manual cleaning, which requires periodic shutdowns, resulting in low efficiency and numerous safety hazards for workers. Furthermore, the reliance on manual intervention creates a dangerous underground environment and disrupts continuous production. Mechanical adjustments using fixed baffles or guide devices lack flexibility to adapt to coal blocks of varying sizes, leading to poor cleaning results. Traditional coal cleaning devices also occupy significant space and, when installed independently outside the transition trough, are prone to interference with components such as scraper chains and cable troughs. Coal jamming issues can cause excessive wear and even breakage of the scraper chain, increasing maintenance costs and the risk of malfunction. These problems severely impact the normal operation of related equipment and efficient production, necessitating targeted solutions for improvement. Summary of the Invention
[0005] This utility model provides a cable trough that prevents coal jamming.
[0006] The purpose of this utility model is achieved in the following manner: an anti-coal-jamming cable trough, comprising a transition trough disposed near the unloading port of a cross-side scraper conveyor, a cable trough disposed on one side of the transition trough, the cable trough comprising a fixed baffle assembly and a rotating shaft gate assembly; the baffle assembly comprising a fixed baffle fixedly disposed on one side of the transition trough, the fixed baffle having a gate-shaped groove; the rotating shaft gate assembly comprising a movable baffle whose one end is rotatably connected to the baffle assembly and thus rotates within the gate-shaped groove; a driving mechanism is disposed between the baffle assembly and the rotating shaft gate assembly to drive the movable baffle to rotate.
[0007] The upper end of the gate-shaped groove is open; the pivot of the movable baffle is located on one of the left or right sides; an arc-shaped baffle is provided on the other side of the movable baffle, and a bottom baffle is provided at the lower end; when the movable baffle rotates, the arc-shaped baffle is always in sliding contact with the side of the gate-shaped groove, and the bottom baffle is always in sliding contact with the lower end face of the gate-shaped groove.
[0008] Both the arc-shaped baffle and the bottom baffle are located on the side of the movable baffle away from the scraper in the transition groove; the cross-section of the arc-shaped baffle is fan-shaped, and its center is located at the axis of rotation of the movable baffle; the bottom baffle is fan-shaped, and its center is located at the intersection of the axis of rotation of the movable baffle and the bottom baffle.
[0009] A supporting horizontal plate is provided below or at the same height as the lower end face of the gate-shaped groove, and a large vertical plate is provided on the fixed baffle near the rotating shaft; the driving mechanism includes a linear driving mechanism with one end set on the large vertical plate; the other end of the linear driving mechanism is respectively hinged to one end of the first connecting rod and one end of the second connecting rod; the other end of the first connecting rod is hinged to the side of the supporting horizontal plate away from the movable baffle, and the other end of the second connecting rod is hinged to the movable baffle.
[0010] A hollow tube serving as a connection hole is provided on the large upright plate near the gate-shaped groove, and a hollow tube is also provided at the corresponding end of the movable baffle. The pivot of the movable baffle is a pin that passes through the large upright plate and the hollow tube on the movable baffle.
[0011] A perforated plate is provided below the supporting horizontal plate, and several parallel stiffeners are provided on the lower surfaces of the supporting horizontal plate and the perforated plate respectively; a handrail steel pipe is provided on the side of the supporting horizontal plate away from the movable baffle.
[0012] Compared to existing technologies, this invention features a rotatable baffle. When coal needs to be cleared from the transition trough, activating the drive mechanism rotates the baffle towards the scraper side of the transition trough, pushing the stuck coal into the scraper or out of the transition trough. This invention automatically clears stuck coal, reducing downtime and improving production efficiency; it also reduces manual intervention: decreasing the frequency of manual cleaning and reducing safety hazards. It reduces equipment wear and malfunctions caused by stuck coal, extending equipment lifespan; and it can adapt to coal of different sizes, improving the versatility of the device. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the existing cross-side unloading port transition groove.
[0014] Figure 2 This is a schematic diagram of the overall transition groove of the cross-side unloading port in this utility model.
[0015] Figure 3 yes Figure 2 Front view.
[0016] Figure 4 This is a schematic diagram of the cable trough of this utility model.
[0017] Figure 5 yes Figure 4 Schematic diagram of the coal block cleaning status of the transfer shaft door assembly.
[0018] Figure 6 This is a schematic diagram of the baffle assembly.
[0019] Figure 7 This is a schematic diagram of the other side of the baffle assembly.
[0020] Figure 8 This is a schematic diagram of a hinged door assembly.
[0021] Among them, 1 is the transition groove, 2 is the baffle assembly, 3 is the unloading port, 4 is the pivot door assembly, 5 is the pivot, 6 is the linear drive mechanism, 7 is the first connecting rod, 8 is the second connecting rod, 20 is the fixed baffle, 21 is the door-shaped groove, 22 is the large upright plate, 23 is the supporting horizontal plate, 24 is the mounting upright plate, 25 is the supporting bottom plate, 26 is the perforated plate, 27 is the stiffening plate, 28 is the handrail steel pipe, 29 is the ear plate, 41 is the movable baffle, 42 is the arc-shaped baffle, 43 is the bottom baffle, and 44 is the hollow tube. Detailed Implementation
[0022] In this utility model, unless otherwise expressly specified and limited, the technical terms used in this application shall have the ordinary meaning understood by those skilled in the art. Terms such as "connected," "linked," "fixed," and "set" shall be interpreted broadly, referring to fixed connections, detachable connections, or integral connections; direct connections or indirect connections via an intermediate medium; mechanical connections or electrical connections. Unless otherwise expressly specified and limited, "above" or "below" a second feature may mean that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," or "over" a second feature may mean that the first feature is 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," or "under" a second feature may mean that the first feature is 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. Relational terms such as "first," "second," etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms used in the description, such as “center,” “lateral,” “longitudinal,” “length,” “width,” “thickness,” “height,” “front,” “rear,” “left,” “right,” “up,” “down,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “axial,” “radial,” “circumferential,” “clockwise,” and “counterclockwise,” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation.
[0023] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Figure 1-8As shown, an anti-coal-jamming cable trough includes a transition trough 1 located near the unloading port 3 of a cross-side scraper conveyor. A cable trough is positioned on one side of the transition trough 1. The cable trough includes a fixed baffle assembly 2 and a rotating shaft gate assembly 4. The baffle assembly 2 includes a fixed baffle 20 fixedly mounted on one side of the transition trough 1, with a gate-shaped groove 21 on the fixed baffle 20. The rotating shaft gate assembly 4 includes a movable baffle 41, one end of which is rotatably connected to the baffle assembly 2, allowing it to rotate within the gate-shaped groove 21. A drive mechanism is provided between the baffle assembly 2 and the rotating shaft gate assembly 4 to rotate the movable baffle 41. The side of the baffle assembly 2 located away from the scraper of the fixed baffle 20 (i.e., the back of the fixed baffle 20) is provided with a horizontal plate, handrail, and other components to form the trough body, which can be used to place cables and other components. The gate-shaped groove 21 can be an open groove at the top or a closed U-shaped groove, as long as it can rotate and push coal blocks on the transition trough 1. The shape of the gate-shaped groove 21 is preferably rectangular, but other shapes are also possible. When coal blocks on the transition groove 1 fall onto the sides of the transition groove 1, or when the coal blocks are too large and get stuck on the two sides, the coal blocks cannot be moved by the scraper to be removed from the nearby unloading port 3. This utility model is equipped with a rotatable movable baffle 41. When it is necessary to clean the coal on the transition groove 1, the drive mechanism can be activated to make the movable baffle 41 rotate toward one side of the scraper of the transition groove 1, thereby pushing the coal blocks stuck on the transition groove 1 into the scraper or out of the transition groove 1. In this utility model, the rotation direction and the position of the rotating shaft 5 can be set as needed, as long as the movable baffle 41 can rotate toward the scraper to push the coal blocks. For example, the rotating shaft can be in a vertical direction perpendicular to the transition groove 1, or in a horizontal direction along the length of the transition groove 1; the rotating shaft can be set in the middle position, the upper position, or the left or right side position of the movable baffle 41, etc. These are all within the protection scope of this utility model. This invention automatically clears stuck coal, reducing downtime and improving production efficiency; it also reduces manual intervention: decreasing the frequency of manual cleaning and lowering safety hazards. It reduces equipment wear and malfunctions caused by stuck coal, extending equipment lifespan; and it can adapt to coal blocks of different sizes, improving the device's versatility.
[0024] Furthermore, the upper end of the gate-shaped groove 21 is open; the rotating shaft 5 of the movable baffle 41 is located on one of the left or right sides; an arc-shaped baffle 42 is provided on the other side of the movable baffle 41, and a bottom baffle 43 is provided at the lower end; when the movable baffle 41 rotates, the arc-shaped baffle 42 is always in sliding contact with the side of the gate-shaped groove 21, and the bottom baffle 43 is always in sliding contact with the lower end face of the gate-shaped groove 21. The arc-shaped baffle 42 and the bottom baffle 43 are provided to prevent coal leakage when the movable baffle 41 rotates. This sliding contact ensures a tight seal, preventing coal chunks and coal powder from entering the anti-jamming cable trough of the scraper conveyor, regardless of the rotation position of the rotating shaft gate assembly 4. Of course, a certain gap can be provided as needed, as long as it ensures that coal chunks and debris do not enter the cable trough through the gap. The angle and radius of the arc-shaped baffle 42 are set as needed. This invention avoids coal leakage by paying attention to details, ensures the integrity of the coal transportation process, reduces coal waste, improves the underground working environment, and reduces the amount of subsequent cleaning work.
[0025] Specifically, both the arc-shaped baffle 42 and the bottom baffle 43 are located on the side of the movable baffle 41 away from the scraper in the transition groove 1. The arc-shaped baffle 42 has a fan-shaped cross-section with its center located at the pivot 5 of the movable baffle 41. The bottom baffle 43 has a fan-shaped shape with its center located at the intersection of the pivot 5 of the movable baffle 41 and the bottom baffle 43. The side of the arc-shaped baffle 42 that slides in contact with the gate-shaped groove 21 is arc-shaped, with its center at the pivot 5. The shape of the side of the arc-shaped baffle 42 away from the gate-shaped groove 21 is determined as needed. The overall cross-section is a fan-shaped or nearly fan-shaped. The area of the bottom baffle 43 near the pivot 5 is relatively narrow, gradually widening towards the pivot 5. The fan shape is only a preferred shape for the bottom baffle 43; other shapes can also be selected as needed. The pivot 5 of the movable baffle 41 can be located closer to the unloading port 3 or relatively away from the unloading port 3.
[0026] Furthermore, a supporting horizontal plate 23 is provided below or at the same height as the lower end face of the gate-shaped groove 21, and a large vertical plate 22 is provided on the fixed baffle 20 near the rotating shaft 5; the driving mechanism includes a linear driving mechanism 6 with one end set on the large vertical plate 22; the other end of the linear driving mechanism 6 is respectively hinged to one end of the first connecting rod 7 and one end of the second connecting rod 8; the other end of the first connecting rod 7 is hinged to the side of the supporting horizontal plate 23 away from the movable baffle 41, and the other end of the second connecting rod 8 is hinged to the movable baffle 41. Specifically, the linear driving mechanism 6 is hinged on the large vertical plate 22. An ear plate 29 is provided on the large vertical plate 22, and a pin hole is provided on the ear plate 29. The linear driving mechanism 6 can be a common telescopic mechanism such as a hydraulic cylinder or an electric push rod, or other linear telescopic driving mechanisms. Either the cylinder body or the moving end of the linear driving mechanism 6 can be inserted into the pin hole of the ear plate 29 through a pin shaft. A limiting end is provided at the upper end of the pin shaft, and a limiting pin or other structure is provided at the lower end of the pin shaft for fixation. The structure of the pin and its fixing and limiting structure are existing technologies and will not be described in detail. The other end of the linear drive mechanism 6, for example, the moving end, is connected to the first connecting rod 7 and the second connecting rod 8 via a pin. The moving end of the linear drive mechanism 6 can be hinged to the first connecting rod 7 and the second connecting rod 8 simultaneously in one position, or it can be hinged to the first connecting rod 7 and the second connecting rod 8 in two separate positions. In the structure shown in the attached diagram, the linear drive mechanism 6 is a hydraulic cylinder, and the connecting hole of the moving end of the hydraulic cylinder is hinged to the first connecting rod 7 and the second connecting rod 8. Furthermore, the upper surface of the supporting horizontal plate 23 is fixed, for example, by welding, to a supporting base plate 25. The end of the supporting base plate 25 away from the movable baffle 41 extends beyond the edge of the supporting horizontal plate 23, and a mounting plate 24 is provided along the edge of the supporting base plate 25. An ear plate 29 is provided on the mounting plate 24, and the first connecting rod 7 is rotatably connected to the ear plate 29 on the mounting plate 24 via a pin. An ear plate 29 is also provided on the movable baffle 41, and is rotatably connected to the second connecting rod 8 via the ear plate 29. The height of the three ear plates 29 is preferably kept consistent. A vertical plate can also be installed on the movable baffle 41, and a portion of the ear plates 29 is also mounted on the vertical plate, enhancing the rigidity of the structure. The mounting plate 24 provides vertical support, enhancing the overall structural stability. This invention employs a linkage mechanism and a hydraulic cylinder to drive the rotating shaft 5. Compared to some complex automated cleaning devices, it has a simpler structure, fewer parts, reduces the probability of failure, and is easier to maintain and repair, reducing maintenance costs and time.
[0027] A hollow tube 44, serving as a connecting hole, is provided on the large upright plate 22 near the portal groove 21. A hollow tube 44 is also provided at the corresponding end of the movable baffle 41. The pivot 5 of the movable baffle 41 is a pin passing through both the large upright plate 22 and the hollow tube 44 on the movable baffle 41. The hollow tube 44 can be a steel pipe and can be fixed to the large upright plate 22 and the movable baffle 41 by welding. A limiting end can be provided at the upper end of the pin to prevent movement, and a U-shaped clip or similar device can be provided at the lower end for further limiting.
[0028] A perforated plate 26 is provided below the supporting horizontal plate 23, and several parallel stiffeners 27 are respectively provided on the lower surfaces of the supporting horizontal plate 23 and the perforated plate 26; a handrail steel pipe 28 is provided on the side of the supporting horizontal plate 23 away from the movable baffle 41. The plates on the fixed baffle 20 located on both sides of the portal groove 21 are the main load-bearing components, and the square holes on them are used for connecting or fixing other components. The stiffeners 27 enhance the rigidity and stability of the structure, serving to reinforce the structure. The perforated plate 26 provides additional connection points and can be used to run cables. Parallel spacers are provided on the fixed baffle 20 between the perforated plate 26 and the supporting horizontal plate 23, which can be used to separate or block, preventing friction between components and protecting cables. A hook perforated plate 26 can also be provided at the upper end of the handrail steel pipe 28, providing a hook function, possibly for suspending or fixing other components. The handrail steel pipe 28 provides support and connection functions.
[0029] In practice: when the coal block is stuck on the transition groove 1 of the machine head, when the piston rod of the cylinder of the linear drive mechanism 6 extends, according to the motion principle of the linkage mechanism, it drives the second connecting rod 8 connected to the movable baffle 41 to move, so that the rotating shaft door assembly 4 rotates clockwise, thereby pushing the coal block stuck on the side of the transition groove 1 of the machine head back onto the scraper. The coal block then continues to be conveyed towards the machine head with the scraper and is removed from the unloading port 3.
[0030] Furthermore, pressure sensors and position sensors can be installed on the transition trough 1 at the machine head to monitor whether coal blocks are stuck in the transition trough 1. All sensors and hydraulic cylinders are electrically connected to the control system. When a coal block is detected stuck in the transition trough 1, the control system issues a command to extend the piston rod of the hydraulic cylinder, which in turn pushes the linkage mechanism. The linkage mechanism drives the rotating shaft door assembly 4 to rotate towards the coal wall. During rotation, the movable baffle 41 of the rotating shaft door assembly 4 pushes the coal block stuck in the transition trough 1 onto the scraper, achieving normal coal transport. After the coal block is cleared, the control system controls the hydraulic cylinder piston rod to retract, resetting the rotating shaft door 5 to prepare for the next coal block jamming situation.
[0031] The technical features of the embodiments described above can be combined in any way, and as long as there is no contradiction in the combination of these technical features, they should all be considered within the scope of this specification. Without departing from the overall concept of this utility model, any equivalent substitutions or modifications made to the technical solution of this utility model, as well as any changes and improvements, should also be considered within the protection scope of this utility model.
Claims
1. A coal-jamming-proof cable trough, comprising a transition trough disposed near the unloading port of a cross-side scraper conveyor, wherein a cable trough is disposed on one side of the transition trough, characterized in that: The cable trough includes a fixed baffle assembly and a rotating hinged door assembly; the baffle assembly includes a fixed baffle fixedly disposed on one side of the transition trough, and a door-shaped groove is provided on the fixed baffle; the hinged door assembly includes a movable baffle whose one end is rotatably connected to the baffle assembly so as to rotate within the door-shaped groove; a driving mechanism is provided between the baffle assembly and the hinged door assembly to drive the movable baffle to rotate.
2. The anti-coal-jamming cable trough according to claim 1, characterized in that: The upper end of the gate-shaped groove is open; the pivot of the movable baffle is located on one of the left or right sides; an arc-shaped baffle is provided on the other side of the movable baffle, and a bottom baffle is provided at the lower end; when the movable baffle rotates, the arc-shaped baffle is always in sliding contact with the side of the gate-shaped groove, and the bottom baffle is always in sliding contact with the lower end face of the gate-shaped groove.
3. The anti-coal-jamming cable trough according to claim 2, characterized in that: Both the arc-shaped baffle and the bottom baffle are located on the side of the movable baffle away from the scraper in the transition groove; the cross-section of the arc-shaped baffle is fan-shaped, and its center is located at the axis of rotation of the movable baffle; the bottom baffle is fan-shaped, and its center is located at the intersection of the axis of rotation of the movable baffle and the bottom baffle.
4. The anti-coal-jamming cable trough according to claim 2, characterized in that: A supporting horizontal plate is provided below or at the same height as the lower end face of the gate-shaped groove, and a large vertical plate is provided on the fixed baffle near the rotating shaft; the driving mechanism includes a linear driving mechanism with one end set on the large vertical plate; the other end of the linear driving mechanism is respectively hinged to one end of the first connecting rod and one end of the second connecting rod; the other end of the first connecting rod is hinged to the side of the supporting horizontal plate away from the movable baffle, and the other end of the second connecting rod is hinged to the movable baffle.
5. The anti-coal-jamming cable trough according to claim 4, characterized in that: A hollow tube serving as a connection hole is provided on the large upright plate near the gate-shaped groove, and a hollow tube is also provided at the corresponding end of the movable baffle. The pivot of the movable baffle is a pin that passes through the large upright plate and the hollow tube on the movable baffle.
6. The anti-coal-jamming cable trough according to claim 4, characterized in that: A perforated plate is provided below the supporting horizontal plate, and several parallel stiffeners are provided on the lower surfaces of the supporting horizontal plate and the perforated plate respectively; a handrail steel pipe is provided on the side of the supporting horizontal plate away from the movable baffle.