Coal stockpile detection device
Patent Information
- Application Number
- CN202522697313.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-19
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-12-19
AI Technical Summary
然而，井下作业环境具有粉尘浓度高、空气湿度大的显著特征，传统外露式安装的传感器易受煤尘污染或水汽干扰，导致误报警或检测失灵等问题；而若为传感器加装防护外壳，又会影响其监测灵敏度，难以准确识别堆煤状态
本申请中所提供的煤料堆积检测装置，通过设置防护外壳，能够对垂直盖板、感应挡片及接近开关等检测部件形成封闭防护，有效隔绝井下高浓度粉尘与水汽，进而克服了传统外露式传感器因易受污染与环境干扰而引发的误报警、检测精度下降及失灵等问题；同时，通过堆积至第一预设高度的煤料推动垂直盖板转动的机械触发方式，配合感应挡片与接近开关的联动检测，以及倾侧开关在堆积至第二预设高度的煤料的挤压作用下倾斜并触发的方式，构建了双重递进式堆煤检测结构，以机械接触式触发配合感应检测的协同设计，既规避了单纯加装防护结构对检测灵敏度的不利影响，又能精准区分不同堆煤高度状态，确保堆煤信号的快速捕捉与可靠传输；此外，该装置通过对堆煤状态的高效响应与准确判定，可及时触发输送带系统的停机保护机制，有效防范堆煤事故对电机、减速器等关键部件的损坏，降低输送带断裂等恶性事故的发生风险，从而保障井下作业人员的人身安全及生产作业的连续稳定。
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Figure CN224916814U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of mining equipment technology, specifically relating to a coal accumulation detection device. Background Technology
[0002] As transportation equipment in coal mining operations, belt conveyor systems are responsible for the continuous transfer of coal materials, and their operational stability directly affects underground production efficiency and operational safety. In actual working conditions, belt conveyor systems are highly susceptible to material accumulation failures due to factors such as downstream silo blockages and obstructed transfer channels. These failures are characterized by their sudden onset and rapid spread: once they occur, a large amount of coal gangue will accumulate at the conveyor drive section within a short period. If the shutdown protection is not triggered in time, the accumulated material will quickly cover critical transmission components such as the motor and reducer, leading to equipment overload. This can cause serious mechanical failures such as motor burnout and gearbox gear damage, and may even trigger catastrophic accidents such as conveyor belt breakage, severely disrupting normal production and posing a significant threat to the personal safety of underground workers.
[0003] To prevent the aforementioned coal pile-up accidents, related technologies employ coal pile detection sensors, infrared detection devices, and other equipment for fault early warning. The core principle is that when abnormal material accumulation is detected, the control system automatically cuts off the power to the conveyor. However, the underground working environment is characterized by high dust concentration and high air humidity. Traditional exposed sensors are easily contaminated by coal dust or interfered with by water vapor, leading to false alarms or detection failures. On the other hand, adding a protective shell to the sensor would affect its monitoring sensitivity, making it difficult to accurately identify the coal pile condition. Utility Model Content
[0004] In view of this, this application provides a coal stacking detection device, the main purpose of which is to achieve accurate and reliable detection of the coal stacking status.
[0005] To achieve the above objectives, this application mainly provides the following technical solutions: This application provides a coal accumulation detection device, comprising: A vertical cover plate is provided, and a cover plate mounting hole is provided on the vertical side wall of the chute. The vertical cover plate is rotatably disposed at the cover plate mounting hole and can cover the cover plate mounting hole. The rotation axis of the vertical cover plate extends along the edge of the cover plate mounting hole, so that when the coal material inside the chute accumulates to a first preset height, it can push the vertical cover plate to rotate away from the inside of the chute. A tilting switch is suspended on the side of the vertical cover plate near the inside of the chute. The tilting switch is located inside the chute and is used to tilt and trigger under the squeezing force of the coal material accumulated to a second preset height. A protective housing is attached to the outside of the mounting hole of the cover plate and covers the outside of the vertical cover plate. A proximity switch is provided on the side wall of the protective housing perpendicular to the vertical side wall of the chute. A sensing baffle is fixed on the side of the vertical cover plate away from the interior of the chute. The proximity switch passes through the side wall of the protective housing perpendicular to the vertical side wall of the chute and extends into the interior of the protective housing. The sensing baffle can enter the detection range of the proximity switch as the vertical cover plate rotates.
[0006] Optionally, the vertical cover plate is rotatably disposed at the cover plate mounting hole via a hinge mechanism, the hinge mechanism being disposed at the upper edge of the cover plate mounting hole, and the rotation axis of the hinge mechanism extending along the upper edge of the cover plate mounting hole.
[0007] Optionally, the coal accumulation detection device further includes: A fixed pulley is disposed on the inner wall of the protective housing; A pull rope, one end of which is fixed relative to the vertical cover plate, and the other end is wound around the fixed pulley and passes through the vertical cover plate, and is connected to the tilt switch.
[0008] Optionally, a rope-blocking buckle is fixedly provided on the side of the vertical cover plate away from the interior of the chute, and the rope-blocking buckle is used to fix one end of the pull rope.
[0009] Optionally, the proximity switch is screwed to a side wall of the protective housing that is perpendicular to the vertical side wall of the chute.
[0010] Optionally, a limiting ring is fitted and fixed at one end of the proximity switch, and the limiting ring is located inside the protective housing and on the rotation path of the vertical cover plate.
[0011] Optionally, a protective tube is provided on the outside of the pull rope, the protective tube is located inside the chute, and the protective tube is fixedly connected to the vertical side wall of the chute.
[0012] Optionally, the bottom of the protective tube is provided with a protective cover, which is used to shield the tilt switch.
[0013] Optionally, the protective cover is an umbrella-shaped structure with an open bottom, and the umbrella-shaped structure has a clearance notch on the side near the inner wall of the chute. The clearance notch is used to keep the tilt switch vertical in the initial state.
[0014] Optionally, the protective housing is provided with a removable cover, which is detachably disposed at the opening end of the protective housing for opening or closing the internal space of the protective housing.
[0015] By employing the above technical solution, this application has at least the following beneficial effects: The coal accumulation detection device provided in this application, by setting up a protective shell, can form a closed protection for detection components such as the vertical cover plate, the induction baffle, and the proximity switch, effectively isolating them from high concentrations of dust and water vapor underground. This overcomes the problems of false alarms, decreased detection accuracy, and malfunctions caused by traditional exposed sensors due to susceptibility to contamination and environmental interference. Simultaneously, the device utilizes a mechanical triggering method where coal accumulated to a first preset height pushes the vertical cover plate to rotate, combined with the linkage detection of the induction baffle and the proximity switch, and a tilting switch that tilts and triggers under the pressure of coal accumulated to a second preset height. A dual-progressive coal pile detection structure was constructed, employing a synergistic design of mechanical contact triggering and inductive detection. This avoids the adverse effects of simply adding protective structures on detection sensitivity while accurately distinguishing different coal pile heights, ensuring rapid capture and reliable transmission of coal pile signals. Furthermore, through efficient response and accurate judgment of the coal pile status, the device can promptly trigger the conveyor belt system's shutdown protection mechanism, effectively preventing damage to critical components such as motors and reducers caused by coal pile accidents, reducing the risk of serious accidents such as conveyor belt breakage, and thus ensuring the personal safety of underground workers and the continuous and stable operation of production. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural schematic diagram of a coal accumulation detection device according to an optional embodiment of this application; Figure 2 This is a cross-sectional view of a coal accumulation detection device according to an optional embodiment of this application; Figure 3 This is a schematic diagram of the structure of the vertical cover plate away from the inside of the chute in one optional embodiment of this application; Figure 4 This is a schematic diagram of the structure of a vertical cover plate near the inside of the chute in an optional embodiment of this application.
[0017] The reference numerals in the attached figures are as follows: 100. Chute; 101. Cover plate mounting hole; 1. Vertical cover plate; 2. Tilting switch; 3. Protective housing; 31. Removable cover; 4. Proximity switch; 5. Induction baffle; 6. Hinge mechanism; 7. Fixed pulley; 8. Pull rope; 9. Rope blocking buckle; 10. Limiting ring; 11. Protective tube; 12. Protective cover. Detailed Implementation
[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., 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 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. Therefore, they should not be construed as limitations on this application.
[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0021] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.
[0022] See also Figures 1 to 4As shown, according to an embodiment of this application, a coal accumulation detection device is provided, including a vertical cover plate 1 and a protective shell 3; a cover plate mounting hole 101 is provided on the vertical side wall of the chute 100, the vertical cover plate 1 is rotatably disposed at the cover plate mounting hole 101, and the vertical cover plate 1 can cover the cover plate mounting hole 101; the rotation axis of the vertical cover plate 1 extends along the edge of the cover plate mounting hole 101, so that when the coal inside the chute 100 accumulates to a first preset height, it can push the vertical cover plate 1 to rotate away from the inside of the chute 100; a tilting switch 2 is suspended on the side of the vertical cover plate 1 near the inside of the chute 100, the tilting switch 2 is positioned... Inside the chute 100, the tilt switch 2 is used to tilt and trigger under the squeezing force of coal piled up to the second preset height; the protective shell 3 is fastened to the outside of the cover plate mounting hole 101, and the protective shell 3 covers the outside of the vertical cover plate 1. A proximity switch 4 is provided on the side wall of the protective shell 3 that is perpendicular to the vertical side wall of the chute 100. A sensing baffle 5 is fixed on the side of the vertical cover plate 1 away from the inside of the chute 100; the proximity switch 4 passes through the side wall of the protective shell 3 that is perpendicular to the vertical side wall of the chute 100 and extends into the inside of the protective shell 3, and the sensing baffle 5 can enter the detection range of the proximity switch 4 as the vertical cover plate 1 rotates.
[0023] The coal accumulation detection device provided in this embodiment, by setting a protective shell 3, can form a closed protection for detection components such as the vertical cover plate 1, the induction baffle 5, and the proximity switch 4, effectively isolating high concentrations of dust and water vapor underground. This overcomes the problems of false alarms, decreased detection accuracy, and malfunctions caused by traditional exposed sensors due to susceptibility to pollution and environmental interference. At the same time, the mechanical triggering method of the vertical cover plate 1 rotating by the coal accumulated to the first preset height, combined with the linkage detection of the induction baffle 5 and the proximity switch 4, and the tilting switch 2 tilting and triggering under the squeezing action of the coal accumulated to the second preset height, all contribute to the device's effectiveness. This device employs a dual-progressive coal pile detection structure, combining mechanical contact triggering with inductive detection. This design avoids the adverse effects of simply adding protective structures on detection sensitivity while accurately distinguishing different coal pile heights, ensuring rapid capture and reliable transmission of coal pile signals. Furthermore, through efficient response and accurate judgment of the coal pile status, the device can promptly trigger the conveyor belt system's shutdown protection mechanism, effectively preventing damage to critical components such as motors and reducers caused by coal pile accidents, reducing the risk of serious accidents such as conveyor belt breakage, and thus ensuring the personal safety of underground workers and the continuous and stable operation of production.
[0024] The chute 100 provides a channel for receiving and guiding coal, used to receive coal to be transferred and guide its directional transport. In this embodiment, the chute 100 is preferably a funnel structure, with its vertical sidewalls specifically referring to sidewalls extending vertically. In practical applications, the chute 100 is installed above the conveyor belt, with its discharge end opposite to the conveying surface of the conveyor belt, and the projection of the discharge end covering the conveying area of the conveyor belt, ensuring that the coal, guided by the chute 100, can accurately fall onto the conveyor belt, achieving continuous coal transfer. Based on this, when downstream silos experience blockages or the transfer channel becomes obstructed, the normal coal transport process is hindered, which can easily lead to accumulation faults inside the chute 100 and on the conveyor belt, providing an application scenario for triggering the aforementioned coal accumulation detection device.
[0025] Specifically, the coal accumulation detection device is installed on the vertical side wall of the chute 100. By utilizing the structural characteristics of the vertical side wall, a stable force can be formed on the coal accumulation detection device during the coal accumulation process, which can trigger its action, thus providing a mechanical basis for the accurate triggering and reliable response of the coal accumulation detection device.
[0026] The coal accumulation detection device includes a vertical cover plate 1. A cover plate mounting hole 101 is provided on the vertical side wall of the aforementioned chute 100. The cover plate mounting hole 101 is approximately rectangular. The vertical cover plate 1 is rotatably mounted at the cover plate mounting hole 101, initially completely covering the cover plate mounting hole 101 to seal the interior of the chute 100 and prevent dust from overflowing. It should be noted that the size of the cover plate mounting hole 101 is adapted to the vertical cover plate 1, providing installation support for the vertical cover plate 1 and enabling the mechanical transmission of coal accumulation signals through the rotation of the vertical cover plate 1.
[0027] Specifically, the vertical cover plate 1 is rotatably mounted on the cover plate mounting hole 101 via a hinge mechanism 6. The hinge mechanism 6 also integrates a rotation limiting function to limit the rotation direction of the cover plate. The rotation axis of the vertical cover plate 1 extends along the edge of the cover plate mounting hole 101, specifically at the upper edge, lower edge, or side edge of the cover plate mounting hole 101. Through the design of the connection point between the hinge shaft and the cover plate, and the cooperation of the limiting protrusion or retaining edge on the edge of the mounting hole, the vertical cover plate 1 can only rotate in a direction away from the interior of the chute 100, that is, open outward from the chute 100, effectively preventing the cover plate from rotating inward from the chute 100 and interfering with the accumulated coal when coal is piled up. In this embodiment, see Figure 1 and Figure 3As shown, the hinge mechanism 6 is specifically set on the upper edge of the cover plate mounting hole 101, and its rotation axis extends along the upper edge. This rotation axis is the rotation reference axis of the vertical cover plate 1. By setting the hinge point on the upper edge, combined with the weight of the vertical cover plate 1 itself and the implicit limiting effect of the lower edge of the mounting hole, it is further ensured that the cover plate can only rotate outward, and the rotation process is smooth and without jamming.
[0028] The rotational resistance of the vertical cover plate 1 is less than the lateral thrust on the vertical cover plate 1 when the coal is piled up to the first preset height, ensuring that rotation can be reliably triggered when the coal pile reaches the first preset height.
[0029] The coal accumulation detection device also includes a protective housing 3. The protective housing 3 is fastened to the side of the cover plate mounting hole 101 away from the inside of the chute 100 and facing the external environment, and completely covers the side of the vertical cover plate 1 facing the outside of the chute 100 and around the edges of the cover plate. In practical applications, the protective housing 3 is a sealed shell, which is installed in close contact with the vertical side wall of the chute 100 to ensure that dust and water vapor cannot enter the interior of the shell. It is used to isolate the high dust and high humidity environment underground, protect components such as the induction baffle 5 and the proximity switch 4, and avoid mechanical jamming or sensor failure caused by environmental interference.
[0030] Specifically, the protective housing 3 has a pre-drilled mounting hole for a proximity switch. The proximity switch 4 is fixed to the side wall of the protective housing 3 perpendicular to the vertical side wall of the chute 100 through this mounting hole, and extends through this side wall into the interior of the protective housing 3. Its sensing end faces the rotation trajectory of the vertical cover plate 1, ensuring that the sensing baffle 5 can accurately enter the detection range when the vertical cover plate 1 rotates. The sensing baffle 5 is fixed to the side wall of the vertical cover plate 1 away from the interior of the chute 100, and is set perpendicular to the vertical cover plate 1, ensuring that the sensing baffle 5 can move along the rotation trajectory of the vertical cover plate 1 during rotation, and thus accurately align with the sensing end of the proximity switch 4. In practical applications, the proximity switch 4 can be a non-contact sensing switch such as electromagnetic induction or capacitive induction, such as a photoelectric proximity switch 4, which has a preset detection distance, such as 5mm to 10mm; the sensing baffle 5 can be a rectangular metal sheet. When the metal sensing baffle 5 enters the preset detection distance range of the proximity switch 4, the proximity switch 4 automatically triggers the corresponding detection signal.
[0031] The coal accumulation detection device also includes a tilt switch 2. In this embodiment, the tilt switch 2 is preferably a mercury hammer switch. It is fixed to the side of the vertical cover plate 1 near the inside of the chute 100 by a suspension structure, and is located inside the chute 100. It is used to directly contact and be squeezed by the coal when it accumulates to a first preset height in the chute 100. It should be noted that the tilt switch 2 has a force-triggered tilting characteristic, and integrates mercury and electrode components inside. When the tilt switch 2 tilts under the squeezing action of the coal, the built-in mercury will flow in the tilting direction and form surface contact with the built-in electrode, thereby realizing the switching of DC current to output the corresponding detection signal.
[0032] Specifically, the first preset height is higher than the second preset height. During the accumulation of coal in the chute 100, the coal will first reach the second preset height, and then gradually reach the first preset height as it continues to accumulate. In practical applications, when the coal in the chute 100 accumulates to the second preset height, the accumulated coal comes into direct contact with the tilt switch 2 and generates a squeezing force, causing the tilt switch 2 to switch from the initial vertical hanging state to the tilted state, thereby triggering and outputting the first detection signal. When the coal continues to accumulate to the first preset height, the lateral thrust generated by the accumulation is greater than the rotational resistance of the vertical cover plate 1, pushing the vertical cover plate 1 to rotate away from the interior of the chute 100. At the same time, it drives the sensing baffle 5, which is fixed to the side of the vertical cover plate 1 away from the interior of the chute 100, to rotate synchronously, so that the sensing baffle 5 enters the detection range of the proximity switch 4, triggering the proximity switch 4 to output the second detection signal.
[0033] Here, the first and second detection signals correspond to different coal accumulation stages, triggering mechanisms, and risk levels. For example, the first detection signal is used to characterize the early warning state that the coal in chute 100 has initially accumulated but has not reached the danger threshold. This signal can be used to control the conveyor belt system to activate the audible and visual alarm, reminding on-site personnel to promptly investigate downstream blockages, poor transfer, and other problems, or to control the conveyor belt to reduce the conveying speed to slow down the coal accumulation rate and prevent the coal accumulation fault from further expanding. The second detection signal is used to characterize the emergency state that the coal in chute 100 has reached the danger accumulation threshold. If the conveyor continues to transport the coal, it will lead to the coal covering the transmission components, causing equipment damage or serious accidents. This signal can be used to directly control the conveyor belt system to cut off the power and shut down, forcibly terminating the coal transfer, preventing the coal accumulation accident from damaging key components such as the motor and reducer, as well as the safety risks such as conveyor belt breakage, thus ensuring equipment safety and the personal safety of underground workers.
[0034] In addition, the following optional signal triggering configuration methods can be adopted to meet the safety management requirements of different downhole operation scenarios: See also some of the alternative embodiments disclosed in this application. Figures 2 to 4As shown, to achieve the goal of the coal accumulation detection device simultaneously outputting a first detection signal and a second detection signal to form redundant protection when the coal accumulates to the second preset height, fault tolerance is achieved through dual signal triggering, maximizing the reliability, safety, and robustness of the coal accumulation detection system. The coal accumulation detection device also includes a fixed pulley 7, a pull rope 8, and a rope threading hole opened on the vertical cover plate 1; wherein: the fixed pulley 7 is fixedly installed on the inner wall of the protective shell 3, and its installation position is adapted to the position of the rope threading hole. For example, if the fixed pulley 7 is fixedly installed on the bottom plate of the protective shell 3, it is used to change the position of the pull rope 8. The direction of force transmission; the rope hole is set through the vertical cover plate 1 in a direction perpendicular to the plate surface, and its diameter is adapted to the diameter of the pull rope 8. The hole wall is provided with wear-resistant protective structures such as rubber pads to avoid wear caused by long-term friction of the pull rope 8; one end of the pull rope 8 is fixedly connected to the top of the tilt switch 2, and the other end passes through the rope hole and is wound around the groove of the fixed pulley 7. The end of the pull rope 8 away from the tilt switch 2 is fixedly connected to the side wall of the vertical cover plate 1 away from the inside of the chute 100, so that the pull rope 8 forms a closed-loop transmission structure of the tilt switch 2, the rope hole, the fixed pulley 7, and the vertical cover plate 1. Based on this, when the coal in the chute 100 accumulates to the second preset height, the accumulated coal exerts a lateral squeezing force on the side of the tilt switch 2, causing the tilt switch 2 to tilt from its initial vertical hanging state to the coal accumulation side. The mercury inside the switch contacts and conducts with the electrode assembly, triggering and outputting the first detection signal. At the same time, the accumulated coal exerts a continuous downward pressure on the tilt switch 2. This downward pressure is the superposition of the coal's own weight and the pressure generated by subsequent accumulation. This downward pressure is transmitted sequentially through the pull rope 8 to the rope hole and the fixed pulley 7. After the fixed pulley 7 changes the direction of force transmission, it is converted into a pulling force that drives the vertical cover plate 1 to rotate away from the inside of the chute 100. This pulling force can overcome the rotational resistance of the vertical cover plate 1, causing the vertical cover plate 1 to rotate around its rotation axis. This, in turn, drives the sensing baffle 5 fixed on the vertical cover plate 1 to rotate synchronously and enter the detection range of the proximity switch 4, triggering the proximity switch 4 to output the second detection signal. Through the force transmission mechanism formed by the fixed pulley 7 and the pull rope 8, the linkage logic of the tilting switch 2 being forced, the pull rope 8 being driven, and the vertical cover plate 1 being rotated is realized. When the coal accumulates to the second preset height, the first detection signal and the second detection signal are triggered synchronously. At this time, if either the first detection signal or the second detection signal is triggered, or if both of them are triggered, the power supply to the conveyor belt system can be directly cut off and the machine stopped, forcibly terminating the coal transfer. This avoids damage to key components such as motors and reducers caused by coal accumulation accidents, prevents safety risks such as conveyor belt breakage, and comprehensively protects the personal safety of underground workers and the stability of equipment operation.
[0035] In the above embodiments, see Figure 2 and Figure 3 As shown, a rope-blocking buckle 9 is fixedly provided on the side of the vertical cover plate 1 away from the inside of the chute 100. The rope-blocking buckle 9 is used to fix one end of the pull rope 8.
[0036] Among them, the vertical cover plate 1 is fixedly provided with a rope-blocking buckle 9 on the side away from the inside of the chute 100, that is, on the wall facing the protective shell 3. The rope-blocking buckle 9 is used to realize the detachable fixation of the end of the pull rope 8 away from the tilt switch 2, so as to ensure the reliability of force transmission between the pull rope 8 and the vertical cover plate 1.
[0037] Specifically, the rope-blocking buckle 9 includes a buckle body that is integrally formed or assembled and fixed, and a locking mechanism. The buckle body can be a block-shaped, clip-shaped, or sleeve-shaped structure, and its interior has a rope insertion hole along the axial direction that matches the diameter of the rope 8 for the end of the rope 8 to be inserted and positioned. The locking mechanism can be a threaded locking type, an elastic clip type, or a buckle structure, used to apply a pressing force or mechanical clamping force to the inserted rope 8. The buckle body is fixed to the wall surface of the vertical cover plate 1 facing the protective shell 3 by welding, bolt connection, or integral injection molding, and its installation position is adapted to the relative position of the rope insertion hole and the fixed pulley 7 to ensure that the rope 8 is in a taut state after assembly and that the force transmission direction is not deviated.
[0038] In the above embodiments, see Figures 1 to 4 As shown, a protective tube 11 is fitted around the pull rope 8. The protective tube 11 is located inside the chute 100 and is fixedly connected to the vertical side wall of the chute 100. Based on this, direct contact between the coal in the chute 100 and the pull rope 8 can be effectively isolated, preventing the pull rope 8 from being worn, tangled, or deformed due to friction, collision, and squeezing of the coal, thus extending the service life of the pull rope 8. At the same time, the fixed support of the protective tube 11 can limit the force transmission path of the pull rope 8, preventing the pull rope 8 from shifting or getting stuck under the impact of coal or its own shaking, ensuring the stable and reliable linkage logic of the tilting switch 2 driving the vertical cover plate 1 to rotate through the pull rope 8 after being subjected to force. In addition, the protective tube 11 can also prevent dust in the chute 100 from adhering to the surface of the pull rope 8, preventing dust from increasing the friction between the pull rope 8 and the rope hole and the fixed pulley 7 or obstructing the transmission, further ensuring the continuity of action and long-term operational stability of the coal accumulation detection device.
[0039] In the above embodiments, see Figures 1 to 4 As shown, a protective cover 12 is provided at the bottom of the protective pipe 11, which is used to shield the tilt switch 2. Based on this, it can effectively prevent coal falling into the chute 100 from directly impacting the tilt switch 2 and prevent it from being mechanically damaged.
[0040] Further, see Figures 1 to 4As shown, the protective cover 12 is an umbrella-shaped structure with an open bottom. A clearance notch is provided on the side of the umbrella-shaped structure closest to the inner wall of the chute 100. This clearance notch ensures that the tilt switch 2 remains vertical in its initial state. Based on this, the necessary conditions are created for the coal to smoothly contact the tilt switch 2 and trigger its tilt when it accumulates to the second preset height, thereby ensuring the accuracy and operational reliability of the coal accumulation detection device's triggering action.
[0041] In some possible embodiments disclosed in this application, the proximity switch 4 is screwed to a side wall of the protective housing 3 that is perpendicular to the vertical side wall of the chute 100.
[0042] In this embodiment, the proximity switch 4 is screwed onto the side wall of the protective housing 3 that is perpendicular to the vertical side wall of the chute 100. By rotating the proximity switch 4, its depth of insertion into the protective housing 3 can be easily and finely adjusted, thereby precisely adjusting the relative distance between the detection end and the sensing baffle 5. This allows for flexible adaptation to the sensitivity requirements of different coal pile detection scenarios, ensuring that the sensing baffle 5 can accurately enter the detection range of the proximity switch 4 when it rotates with the vertical cover plate 1, avoiding false triggering or untimely triggering due to distance deviation. At the same time, the screw connection method also provides assembly stability, allowing the proximity switch 4 to maintain a stable installation position in the underground vibration environment, and it is easy to disassemble, facilitating later inspection and maintenance. Combined with the sealing structure, it can also enhance the sealing of the protective housing 3, reduce the corrosion of components by underground dust and water vapor, and ensure the long-term stable operation of the detection device.
[0043] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 3 As shown, a limit ring 10 is sleeved and fixed at one end of the proximity switch 4. The limit ring 10 is located inside the protective housing 3 and on the rotation path of the vertical cover plate 1.
[0044] In this embodiment, a limiting ring 10 is fitted and fixed at one end of the proximity switch 4 located inside the protective housing 3, and the limiting ring 10 is positioned on the rotation path of the vertical cover plate 1. Through the physical blocking effect of the limiting ring 10 on the vertical cover plate 1, the maximum rotation angle of the vertical cover plate 1 can be limited, preventing it from opening excessively under the lateral thrust of the coal. This prevents the formation of an excessively large gap between the vertical cover plate 1 and the cover plate mounting hole 101 on the vertical side wall of the chute 100, effectively preventing the coal in the chute 100 from entering the interior of the protective housing 3 through this gap. This avoids the coal from causing contamination, jamming, or structural damage to the detection components such as the proximity switch 4 and the sensing baffle 5 inside the protective housing 3, ensuring the normal working performance of the detection components.
[0045] Furthermore, in this embodiment, when the vertical cover plate 1 rotates to abut against the limiting ring 10, the sensing baffle 5 on the vertical cover plate 1 is within the detection range of the proximity switch 4.
[0046] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the protective housing 3 is provided with a movable cover 31, which is detachably disposed at the opening end of the protective housing 3 for opening or closing the internal space of the protective housing 3.
[0047] In this embodiment, the detachable and movable cover 31 of the protective housing 3 can reliably seal the internal space of the protective housing 3 in a non-maintenance state, continuing the function of the protective housing 3 in isolating the high dust and high humidity environment underground, and preventing the internal proximity switch 4, induction baffle 5, pull rope 8 and other components from being contaminated or affected by environmental interference, thus affecting the detection performance. On the other hand, the protective housing 3 can be easily disassembled and opened, providing a convenient operating channel for daily inspection, sensitivity adjustment, fault repair and component replacement of the internal detection components without disassembling the entire protective housing 3, which significantly improves the device maintenance efficiency, while ensuring that the sealing of the protective housing 3 is not damaged after maintenance, ensuring the long-term stable and reliable operation of the coal accumulation detection device.
[0048] Specifically, the top of the protective shell 3 is open to form an open end, and the upper surface of the movable cover 31 is fixed with a handle that is easy to hold and operate. The movable cover 31 is connected to the open end of the top of the protective shell 3 by means of the handle, thereby achieving the sealing of the internal space of the protective shell 3.
[0049] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.
[0050] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.
Claims
1. A coal accumulation detection device, characterized in that, include: A vertical cover plate is provided, and a cover plate mounting hole is provided on the vertical side wall of the chute. The vertical cover plate is rotatably mounted at the cover plate mounting hole, so that when the coal material inside the chute accumulates to a first preset height, it can push the vertical cover plate to rotate away from the inside of the chute. A tilting switch is suspended on the side of the vertical cover plate near the inside of the chute. The tilting switch is used to tilt and trigger under the squeezing force of the coal material that has accumulated to a second preset height. A protective housing is attached to the outside of the mounting hole of the cover plate and covers the outside of the vertical cover plate. A proximity switch is provided on the side wall of the protective housing that is perpendicular to the vertical side wall of the chute. A sensing baffle is fixedly provided on the side of the vertical cover plate away from the interior of the chute. The proximity switch passes through the corresponding side wall and extends into the interior of the protective housing. The sensing baffle can enter the detection range of the proximity switch as the vertical cover plate rotates.
2. The coal accumulation detection device according to claim 1, characterized in that, The vertical cover plate is rotatably mounted at the cover plate mounting hole via a hinge mechanism. The hinge mechanism is located at the upper edge of the cover plate mounting hole, and the rotation axis of the hinge mechanism extends along the upper edge of the cover plate mounting hole.
3. The coal accumulation detection device according to claim 1, characterized in that, Also includes: A fixed pulley is disposed on the inner wall of the protective housing; A pull rope, one end of which is fixed relative to the vertical cover plate, and the other end is wound around the fixed pulley and passes through the vertical cover plate, and is connected to the tilt switch.
4. The coal accumulation detection device according to claim 3, characterized in that, A rope-blocking buckle is fixed on the side of the vertical cover plate away from the inside of the chute, and the rope-blocking buckle is used to fix one end of the pull rope.
5. The coal accumulation detection device according to claim 1, characterized in that, The proximity switch is screwed into the protective housing on a side wall perpendicular to the vertical side wall of the chute.
6. The coal accumulation detection device according to claim 5, characterized in that, One end of the proximity switch is fitted with and fixed with a limit ring, which is located inside the protective housing and on the rotation path of the vertical cover plate.
7. The coal accumulation detection device according to claim 3, characterized in that, The pull rope is fitted with a protective tube, which is located inside the chute and is fixedly connected to the vertical sidewall of the chute.
8. The coal accumulation detection device according to claim 7, characterized in that, The bottom of the protective tube is provided with a protective cover, which is used to shield the tilt switch.
9. The coal accumulation detection device according to claim 8, characterized in that, The protective cover is an umbrella-shaped structure with an open bottom. The umbrella-shaped structure has a clearance notch on the side near the inner wall of the chute. The clearance notch is used to keep the tilt switch vertical in the initial state.
10. The coal accumulation detection device according to claim 1, characterized in that, The protective housing is provided with a movable cover, which is detachably disposed at the opening end of the protective housing and is used to open or close the internal space of the protective housing.