Coal mine advanced detection method for heading machine

    公开(公告)号:US11099146B1

    公开(公告)日:2021-08-24

    申请号:US17264412

    申请日:2020-03-13

    摘要: When the heading machine tunnels, a current generated by a current excitation source enters a coal seam through a movable cutting pick to form a stray current. The stray current collected by a backflow net returns to a negative electrode of a power supply through a transition resistor. When information such as the water content of the coal seam changes, the stray current and a potential difference across the transition resistor also accordingly change, and the coal seam water content information is converted into an electric signal. When the potential difference across the transition resistor is applied to two ends of a piezoelectric ceramic, the piezoelectric ceramic extends or compresses, and the electric signal is converted into a strain signal. A sensing optical fiber converts the strain signal into an optical signal detectable by a photoelectric detector. The optical signal is analyzed to obtain the coal seam water content information.

    Scraper conveyor chain tensioning device having sweeping function

    公开(公告)号:US10173846B2

    公开(公告)日:2019-01-08

    申请号:US15564659

    申请日:2015-12-29

    摘要: A scraper conveyor chain tensioning device having a sweeping function, comprising a transmission device (2), a steering chain wheel (3), scraper chains (4), and ledges (5), wherein a chain tensioning device (1) is arranged above the scraper chains (4) arranged at the side of the steering chain wheel (3), the chain tensioning device (1) is provided with a sweeping device (12), the chain tensioning device (1) comprises a slider-crank mechanism and two chutes (13) symmetrically fixed to the ledges (5) on two sides at an inclined angle, a tensioning shaft (19) is arranged between the two chutes (13), the tensioning shaft (19) is arranged on a bearing seat (18) via a bearing, and the middle part of the tensioning shaft (19) is provided with a tensioning chain wheel (11) matching with a transmission chain; and the sweeping device (12) comprises a tensioning shaft sleeve (12-3), a plurality of groups of sweeping heads (12-2) is arranged on the circumference of the tensioning shaft sleeve (12-3) at intervals, and the sweeping heads (12-2) are fixed to the tensioning shaft sleeve (12-3) via springs (12-1). Caking coal on a scraper can be swept via scraping teeth on sweeping heads (12-2), the problems of friction, chain jumping and jamming caused by the caking coal on the scraper are solved, the scraper conveyor chain tensioning device is applicable to a middle double-chain scraper conveyor, the change on an original scraper conveyor is small, and pure mechanical transmission is adopted, thereby being simple in mechanism, convenient to assemble and disassemble, and reliable in operation.

    Drilling and Bursting Heading Machine
    23.
    发明申请

    公开(公告)号:US20180195388A1

    公开(公告)日:2018-07-12

    申请号:US15741192

    申请日:2016-08-11

    IPC分类号: E21D9/10 E21C27/22 E21C27/28

    摘要: A drilling and bursting heading machine, comprising a drilling and bursting device (1), an angle control device, a forward-backward telescopic device and a cantilever type heading machine (2), wherein the drilling and bursting device (1) is mounted on a forward-backward moving component of the forward-backward telescopic device by means of the angle control device, and the forward-backward telescopic device is mounted on the cantilever type heading machine (2); the drilling and bursting device (1) comprises a fixing support (1-20), as well as a rock drill component and a bursting component fixedly mounted on the fixing support (1-20) respectively; the angle control device comprises a mounting base (1-15), an auxiliary rotary hydraulic motor (1-14), an adjustment hydraulic cylinder (1-13) and a main rotary hydraulic motor (1-12); and when the forward-backward moving component of the forward-backward telescopic device completely extends out, the distance from a front end of the drilling and bursting device (1) to a working plane is shorter than the distance from a front end of a cutting head of the cantilever type heading machine (2) to the working plane. The drilling and bursting heading machine has a compact structure and is able to implement quick drilling and bursting on a hard rock stratum having a rock hardness f greater than 10 without increasing the energy consumption, so that the heading efficiency is improved and potential safety risks are reduced.

    Horizontally movable vertical shaft rope guide and regulating method thereof

    公开(公告)号:US09975737B2

    公开(公告)日:2018-05-22

    申请号:US15520478

    申请日:2015-12-29

    IPC分类号: B66B17/00 B66B19/00 E21D7/02

    CPC分类号: B66B17/00 B66B19/00 E21D7/02

    摘要: The present invention relates to a horizontally movable vertical shaft rope guide and a regulating method thereof, which are suitable for guiding of hoisting containers in vertical shafts. The vertical shaft rope guide comprises a hoisting rope, and two hoisting containers suspended from the tail ends of the hoisting rope, wherein, cage guide ropes are led through guide cage lugs arranged on the two sides respectively, a tensioner arranged on the ground at the shaft top is connected to the upper end of each cage guide rope, and a connector arranged under a steel slot at the shaft bottom is connected to the lower end of each cage guide rope; a hydraulic cylinder is connected at the other side of each tensioner and the corresponding connector, and the hydraulic cylinder is connected to the tensioner or connector. During hoisting in the vertical shaft, the hydraulic cylinders are controlled to act in advance, to push the tensioners or connectors to move towards the center between the two hoisting containers, so that the cage guide ropes led through the guide cage lugs on the two sides of the hoisting containers get close to each other at the same time and wrap the hoisting container; thus, the horizontal displacement of the hoisting containers is restrained, and the impact of air flow on the two hoisting containers is minimized when the two hoisting containers meet.

    FALL PREVENTION BRAKE BUFFERING SYSTEM FOR HIGH-SPEED MINE LIFT
    29.
    发明申请
    FALL PREVENTION BRAKE BUFFERING SYSTEM FOR HIGH-SPEED MINE LIFT 有权
    防止高速地雷提升制动缓冲系统

    公开(公告)号:US20150122592A1

    公开(公告)日:2015-05-07

    申请号:US14383836

    申请日:2013-03-25

    IPC分类号: B66B5/24

    CPC分类号: B66B5/24 B66B7/085 B66B7/10

    摘要: Disclosed is a fall prevention brake buffering system for high-speed mine lift, including brake ropes (2) fixed on two sides of a car (5). One end of the brake rope (2) is fixed on the top part of a vertical well (6), and the other end is fixed on the bottom part of the vertical well (6). A linkage mechanism (11) is arranged at the bottom of the car (5). A buffer (1) is arranged at the top of the brake rope (2), and a tension connector (4) is arranged at the bottom of the brake rope (2). A brake rope safety tong (3) fixed on the brake rope (2) and connected with the linkage mechanism (11) is arranged at the bottom of the car (5). The buffer (1) includes an inverted brake rope gradual safety tong (8) with a buffering rope (9) provided therein and connected with the brake rope (2). A buffering rope clip (10) is arranged on the buffering rope (9). The system is convenient to install, and the buffering force of the brake rope is constant and adjustable. The system realizes reliable fall prevention brake function, greatly improves safety performance during high-speed operation of a lift with non-rigid rails, and increases safety performance during high-speed operation of a mine lift.

    摘要翻译: 公开了一种用于高速矿井升降机的防坠落制动缓冲系统,包括固定在汽车(5)两侧的制动绳索(2)。 制动绳索(2)的一端固定在竖井(6)的顶部,另一端固定在垂直井(6)的底部。 在轿厢(5)的底部设有连杆机构(11)。 缓冲器(1)布置在制动绳索(2)的顶部,并且张紧连接器(4)布置在制动绳索(2)的底部。 固定在制动绳索(2)上并与连杆机构(11)连接的制动绳安全钳(3)布置在轿厢(5)的底部。 缓冲器(1)包括具有设置在其中并与制动绳索(2)连接的缓冲绳(9)的倒立制动绳梯级安全钳(8)。 缓冲绳夹(10)布置在缓冲绳(9)上。 该系统安装方便,制动绳的缓冲力恒定可调。 该系统实现了可靠的防坠落制动功能,大大提高了非刚性导轨电梯高速运行时的安全性能,提高了矿山电梯高速运行时的安全性能。

    Vehicle-mounted large-flow fire-fighting foam fluid mixing system

    公开(公告)号:US11865389B2

    公开(公告)日:2024-01-09

    申请号:US16975421

    申请日:2019-05-14

    IPC分类号: A62C5/02 A62C27/00

    CPC分类号: A62C5/022 A62C27/00

    摘要: The present invention discloses a vehicle-mounted large-flow fire-fighting foam fluid mixing system, including a supply kit, a mixing kit, a control kit, and a pipeline kit. The supply kit includes an auxiliary gas supply device, a fire pump, an integrated foam pump, a fire pump main motor, and a coupling. The mixing kit includes a fire monitor interface, a foam generating device, and a fluid mixing device. The control kit includes a foam mixing proportion single-chip microcomputer control system, an alarm module, a power module, an auxiliary air compressor switch module, a frequency converter, and a central control display screen. The pipeline kit includes an air drainage tube, a fire hose, a foam liquid pipe, and a pipeline valve. For the problems of flow fluctuation and low foam foaming efficiency, the present invention optimizes the design and adopts a new control policy, thereby implementing precise mixing under the large-flow condition.