An automatic coal cutting device for a coal mining machine
Patent Information
- Application Number
- CN202521876131.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-02
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-09-02
AI Technical Summary
现有技术中，采煤机滚筒的升降主要依赖人工经验或单点位置传感器进行调节，当工作面底板存在起伏变化时，滚筒的割深控制往往滞后，容易导致割深不均、割底过深或悬空割煤等问题，不仅降低了煤炭资源利用率，还可能对运输机溜槽、滚筒齿尖及机身结构造成冲击损伤
[0010]与现有技术相比，本实用新型所达到的有益效果是：本实用新型，通过在运输机溜槽内侧固定挡煤板，并在挡煤板外侧安装双轴姿态传感器，实现了在采煤机推进过程中对工作面底板姿态的连续采集；通过在双轴姿态传感器与挡煤板之间设置弹性减振垫，能够有效抑制采煤机运行过程中的振动传递，提高传感器测量的稳定性；通过在传感器外侧设置金属防护片并采用螺纹紧固件与运输机溜槽可拆卸连接，不仅提高了传感器的防护能力，而且便于后期检修与更换；通过溜槽外侧的线缆槽横向布设电缆，并利用螺纹压紧式电缆密封接头实现可拆卸连接，保证了电缆布线的可靠性和维护便利性；多个双轴姿态传感器按等距间隔布置，能够形成工作面底板姿态的连续采集链，避免了单点检测数据不完整的问题。由此，本实用新型在保证装置整体结构强度的同时，提高了底板姿态检测的连续性与可靠性，为采煤机割深控制提供了稳定的数据基础。
Smart Images
Figure CN224830630U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automated control technology for fully mechanized coal mining, and in particular to an automated coal cutting device for a coal mining machine. Background Technology
[0002] During the coal cutting process of a fully mechanized longwall face, the control of the cutting depth directly affects the coal resource recovery rate and the safety of equipment operation. In existing technologies, the raising and lowering of the coal mining machine drum mainly relies on manual experience or single-point position sensors for adjustment. When there are undulations in the working face floor, the drum's cutting depth control often lags behind, easily leading to problems such as uneven cutting depth, excessively deep cutting, or cutting coal in mid-air. This not only reduces the coal resource utilization rate but may also cause impact damage to the conveyor chute, drum tooth tips, and machine body structure.
[0003] Regarding sensor installation, existing technologies often employ single tilt sensors or position detection devices directly installed near the machine body or floor. This approach suffers from drawbacks such as scattered placement, discontinuous data, and susceptibility to wear and tear from coal flow impacts. Consequently, it is difficult to form a complete sensing chain for the attitude of the working face floor, resulting in insufficient reliability and accuracy. Furthermore, the complex arrangement of sensor cables in confined spaces makes them prone to vibration damage and loosening when protective measures are inadequate, increasing maintenance difficulty.
[0004] Therefore, how to reasonably fix and effectively protect the sensors on the conveyor chute of the fully mechanized mining face, ensure the continuous acquisition of attitude information, and link them with the coal mining machine drum lifting system to achieve automated coal cutting control has become a technical problem that urgently needs to be solved in this field. Utility Model Content
[0005] The purpose of this invention is to provide an automated coal cutting device for a coal mining machine to solve the problems mentioned in the background art.
[0006] In order to solve the above-mentioned technical problems, the present invention provides the following technical solution: an automated coal cutting device for a coal mining machine, including a conveyor chute arranged along the longwall working face; A coal retaining plate is fixedly installed inside the conveyor chute. The upper end of the coal retaining plate is a vertical plate, and the lower end is provided with an outwardly bent reinforcing transition section. A dual-axis attitude sensor is installed on the outside of the coal retaining plate. The dual-axis attitude sensor is fixed to the threaded hole of the mounting base by bolts passing through the through hole of the coal retaining plate and the threaded hole of the mounting base. An elastic damping pad is set between the dual-axis attitude sensor and the coal retaining plate. The lead cable of the dual-axis attitude sensor is laid laterally along the cable groove set on the outside of the conveyor chute, and is detachably connected to the adjacent cable through a threaded compression cable sealing joint. Multiple dual-axis attitude sensors are installed at equal intervals on the coal retaining plate to form a continuous acquisition chain of the attitude of the fully mechanized mining face floor. The dual-axis attitude sensor is provided with a metal protective plate on its outer side, and the metal protective plate is detachably connected to the conveyor chute by threaded fasteners.
[0007] According to the above technical solution, the coal retaining plate is fixedly connected to the conveyor chute by welding.
[0008] According to the above technical solution, the elastic damping pad is a rubber pad or a polyurethane elastomer pad.
[0009] According to the above technical solution, the cable trough is arranged along the long side of the conveyor chute.
[0010] Compared with existing technologies, the beneficial effects achieved by this utility model are as follows: This utility model, by fixing a coal retaining plate inside the conveyor chute and installing a dual-axis attitude sensor on the outside of the coal retaining plate, achieves continuous acquisition of the working face floor attitude during the coal mining machine's advancement; by setting an elastic damping pad between the dual-axis attitude sensor and the coal retaining plate, it effectively suppresses vibration transmission during the operation of the coal mining machine, improving the stability of sensor measurements; by setting a metal protective plate on the outside of the sensor and using threaded fasteners for detachable connection with the conveyor chute, it not only improves the sensor's protection capability but also facilitates later maintenance and replacement; by horizontally laying cables in the cable trough outside the chute and using threaded compression cable sealing joints for detachable connection, it ensures the reliability of cable wiring and ease of maintenance; multiple dual-axis attitude sensors arranged at equal intervals form a continuous acquisition chain of working face floor attitude, avoiding the problem of incomplete data from single-point detection. Therefore, this utility model, while ensuring the overall structural strength of the device, improves the continuity and reliability of floor attitude detection, providing a stable data foundation for coal mining machine cutting depth control. Attached Figure Description
[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of an automated coal cutting device for a coal mining machine proposed in this utility model; Figure 2 This is a side view of an automated coal cutting device for a coal mining machine proposed in this utility model.
[0012] In the picture: 1. Conveyor chute, 2. Dual-axis attitude sensor, 3. Coal retaining plate. Detailed Implementation
[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0014] Example: Reference Figure 1-2 An automated coal cutting device for a coal mining machine includes a conveyor chute 1 arranged in series along the longwall working face, a coal retaining plate 3 fixedly installed inside the conveyor chute 1, and a dual-axis attitude sensor 2 installed outside the coal retaining plate 3 for collecting bottom plate attitude information. The coal retaining plate 3 is welded to the conveyor chute 1. The upper end of the coal retaining plate 3 is a vertical plate, and the lower end has an outwardly bent reinforcing transition section to improve rigidity. Each dual-axis attitude sensor 2 is fixed to the mounting base threaded hole of the dual-axis attitude sensor 2 by four bolts passing through the through hole of the coal retaining plate 3. An elastic damping pad is provided between the dual-axis attitude sensor 2 and the coal retaining plate 3. To suppress vibration transmission, the lead cable of the dual-axis attitude sensor 2 is laid transversely (along the long side of the working face) along the cable groove set on the outside of the conveyor chute 1 and is detachably connected to the adjacent cable through a threaded compression cable seal joint. Multiple dual-axis attitude sensors 2 are arranged at equal intervals on the coal retaining plate 3 to form a continuous acquisition chain of the working face bottom attitude. In the above structure, the conveyor chute 1 serves as the bearing base, and the coal retaining plate 3 plays a dual role of coal retention and installation carrier. The dual-axis attitude sensor 2 does not directly contact the coal flow during operation. A metal protective plate is set on the outside and is detachably connected to the conveyor chute 1 with threaded fasteners for maintenance. The working process of the device is as follows: After the power is turned on before the shift, the dual-axis attitude sensor 2 completes zero-point calibration and begins to output pitch and roll attitude data at a fixed frequency. The data is transmitted to the coal mining machine electrical control system (not shown) through the existing cable channel below the conveyor chute 1. As the coal mining machine advances along the traction direction (axial direction), several dual-axis attitude sensors 2 located in front of the coal mining machine continuously provide information on the trend of the front floor. The electrical control system issues extension and retraction commands to the coal mining machine drum height adjustment mechanism (not shown) based on the attitude changes at adjacent positions. The active component is the drum height adjustment actuator, and the driven component is the drum lifting linkage, which completes the vertical lifting and lowering coordination of the front and rear drums to maintain a stable cutting depth. When the front floor is detected to have an upward arching or downward concave trend in the traction direction, the electrical control system sequentially executes the following actions: "reduce or increase the vertical gap between the drum and the floor - confirm the displacement is in place - restore the predetermined traction speed". When a single-point communication interruption occurs in the dual-axis attitude sensor 2, the system maintains short-term interpolation with the data of the adjacent dual-axis attitude sensor 2 and prompts for maintenance. After communication is restored, it automatically switches to real-time data. When stopping the machine at the end of the shift, the coal mining machine traction is stopped first, then the detachable connection between the dual-axis attitude sensor 2 and the cable is disconnected, and the coal retaining plate 3 and fastener status are checked to complete a complete automated coal cutting operation.
[0015] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0016] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An automated coal cutting device for a coal mining machine, characterized in that, include: Conveyor chutes (1) are arranged along the long wall working face; A coal retaining plate (3) is fixedly installed inside the conveyor chute (1). The upper end of the coal retaining plate (3) is a vertical plate, and the lower end is provided with an outwardly bent reinforcing transition section. A dual-axis attitude sensor (2) is installed on the outside of the coal retaining plate (3). The dual-axis attitude sensor (2) is fixed to the threaded hole of the mounting base by bolts passing through the through hole of the coal retaining plate (3) and an elastic damping pad is provided between the dual-axis attitude sensor (2) and the coal retaining plate (3). The lead cable of the dual-axis attitude sensor (2) is laid horizontally along the cable groove set outside the conveyor chute (1) and is detachably connected to the adjacent cable through a threaded clamping cable sealing joint. Multiple dual-axis attitude sensors (2) are installed at equal intervals on the coal retaining plate (3) to form a continuous acquisition chain of the attitude of the bottom plate of the fully mechanized mining face; The dual-axis attitude sensor (2) is provided with a metal protective plate on its outer side, and the metal protective plate is detachably connected to the conveyor chute (1) by threaded fasteners.
2. The automated coal cutting device for a coal mining machine according to claim 1, characterized in that, The coal retaining plate (3) is fixedly connected to the conveyor chute (1) by welding.
3. The automated coal cutting device for a coal mining machine according to claim 1, characterized in that, The elastic damping pad is a rubber pad or a polyurethane elastomer pad.
4. The automated coal cutting device for a coal mining machine according to claim 1, characterized in that, The cable trough is set along the long side of the conveyor chute (1).