WO2015074358A1 - 一种大吨位窄长外动力式曲轨卸载箕斗 - Google Patents

一种大吨位窄长外动力式曲轨卸载箕斗 Download PDF

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Publication number
WO2015074358A1
WO2015074358A1 PCT/CN2014/074090 CN2014074090W WO2015074358A1 WO 2015074358 A1 WO2015074358 A1 WO 2015074358A1 CN 2014074090 W CN2014074090 W CN 2014074090W WO 2015074358 A1 WO2015074358 A1 WO 2015074358A1
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WIPO (PCT)
Prior art keywords
box body
plate
unloading
coal
gate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/074090
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English (en)
French (fr)
Inventor
朱真才
周公博
胡长华
曹国华
李伟
陈国安
彭玉兴
杜庆永
王淼
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
XUZHOU COAL MINE SAFETY EQUIPMENT MANUFACTURE CO Ltd
China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
Original Assignee
XUZHOU COAL MINE SAFETY EQUIPMENT MANUFACTURE CO Ltd
China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by XUZHOU COAL MINE SAFETY EQUIPMENT MANUFACTURE CO Ltd, China University of Mining and Technology CUMT, China University of Mining and Technology Beijing CUMTB filed Critical XUZHOU COAL MINE SAFETY EQUIPMENT MANUFACTURE CO Ltd
Priority to CA2893707A priority Critical patent/CA2893707C/en
Priority to RU2014147104A priority patent/RU2607137C2/ru
Priority to AU2014351099A priority patent/AU2014351099B2/en
Priority to US14/647,671 priority patent/US9878882B2/en
Priority to ZA2014/08777A priority patent/ZA201408777B/en
Publication of WO2015074358A1 publication Critical patent/WO2015074358A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B17/00—Hoistway equipment
    • B66B17/08—Mining skips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B17/00—Hoistway equipment
    • B66B17/14—Applications of loading and unloading equipment
    • B66B17/26—Applications of loading and unloading equipment for loading or unloading mining-hoist skips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B17/00—Hoistway equipment
    • B66B17/14—Applications of loading and unloading equipment
    • B66B17/28—Applications of loading and unloading equipment electrically controlled
    • B66B17/32—Applications of loading and unloading equipment electrically controlled for skips

Definitions

  • the invention relates to a large-tonnage narrow-length outer-dynamic rail unloading bucket, in particular to a power-type rail unloading bucket suitable for a large-scale vertical mine of 10 million tons.
  • the currently used sluice gate opening device is affected by the change of the stopping distance of the bucket, and the opening device is deformed. Therefore, the current large-scale bucket cannot meet the problem that the large-scale mine of 10 million tons requires the replacement of the liner, the smooth opening of the gate, and the convenience of processing and assembly.
  • the object of the present invention is to overcome the deficiencies in the prior art and provide a large tonnage ⁇ which is simple in structure, safe and reliable, easy to produce and install, economical and practical, and can adapt to large-scale, high-yield and high-efficiency development of coal mines. Fight.
  • the large-tonnage narrow-length outer-powered rail unloading bucket of the present invention comprises a coal-slipping device, and a bucket box is connected to an upper part of the coal-slipping device, and a top rope suspension is arranged on the top of the bucket box body a connecting plate, the bottom of the coal sluice device is provided with a tail rope suspension connecting plate, wherein the hopper box body is formed by connecting the upper box body and the lower box body, and the outer wall of the upper and lower box is circumferentially welded with channel steel;
  • the upper port of the box body is provided with a coal blocking plate, and the lower port of the lower box body is provided with a self-locking gate and a gate opening device at the upper part of the coal sluice device, the self-locking gate includes a fan-shaped shutter plate) and an unloading roller, and the unloading roller
  • the welding device is welded under the symmetrical center line of the fan gate plate;
  • the gate opening device comprises a telescopic push rod fixed at
  • the bucket body comprises an inner liner and an outer panel, and the outer panel is provided with a plurality of pins fixed to the inner liner, and each pin is fixed on the outer panel Pin.
  • the slider comprises a rectangular plate frame, an unloading track fixedly connected to one side of the plate frame, and four rollers with "U"-shaped grooves are respectively arranged at four corners of the plate frame, and upper and lower ends of the plate frame Upper and lower "n"-type guide rails that move the left and right of the restraining roller in the horizontal direction are respectively provided.
  • Beneficial effects Through the reliable connection of the upper and lower boxes, the effective and convenient fixing of the lining, and the reliable opening of the door, meet the requirements of large-scale mines of 10 million tons. The main advantages are:
  • the inner lining plate is fixed by the pin shaft, which avoids the opening of the lining plate, and the inner lining plate is fixedly connected with the outer layer plate by the pin, and the lining plate is also easily replaced;
  • the external power telescopic push rod and the rail unloading slider are used, which integrates the rapidity of the rail unloading and the small impact characteristics of the external power unloading, ensuring the safety and reliability of the bucket unloading.
  • FIG. 1 is a general view of a large-tonnage narrow-length outer-dynamic rail unloading bucket of the present invention.
  • FIG. 2 is a front view showing the structure of a large-tonnage narrow-length outer-powered rail unloading bucket according to the present invention.
  • FIG. 3 is a side view structural view of the large-tonnage narrow-length outer-powered rail unloading bucket of the present invention.
  • Figure 4 is a structural view of the flange connection between the upper and lower casings of the bucket of the present invention.
  • Figure 5 is a partial flange connection structure of Figure 4.
  • Fig. 6 is a partially enlarged plan view showing the connection arrangement of the inner liner and the outer layer of the bucket of the present invention.
  • Figure 7 is a top plan view showing the connection arrangement of the inner liner and the outer layer of the bucket of the present invention.
  • Figure 8 is a connection diagram of the shutter opening device of the present invention.
  • the large-tonnage narrow-length outer-power rail unloading bucket of the invention mainly comprises a bucket box body, a first rope suspension connecting plate 3, a self-locking door 6, a coal sluice device 7, a tail rope suspension connecting plate 8 and a door opening.
  • Device configuration The bucket box body is disposed at an upper portion of the coal sluice device 7, the first rope suspension connecting plate 3 is disposed at the top of the hopper box body, and the tail rope suspension connecting plate 8 is disposed at the bottom of the slinging device 7, the first rope suspension connecting plate 3 and tail rope suspension connecting plate 8 is used to connect the lifting wire rope.
  • the bucket box body is formed by connecting the upper box body 1 and the lower box body 2, and the bucket box body comprises an inner layer liner 10-1 and an outer layer board 10-2, and the outer layer board 10-2 A plurality of pins 11 fixed to the inner liner 10-1 are provided, and each of the pins 11 is provided with a pin 11-1 fixed to the outer plate 10-2.
  • the outer walls of the upper case 1 and the lower case 2 are circumferentially welded around
  • the upper port of the upper casing 1 is provided with a coal blocking plate 4, and the lower port of the lower casing 2 is provided with a self-locking gate 6 and a gate opening device at the upper portion of the coal sluice device 7, and the self-locking gate 6
  • the utility model comprises a fan shutter plate 6-1 and an unloading roller 6-2.
  • the unloading roller 6-2 is welded under the symmetrical center line of the sector gate plate 6-1;
  • the gate opening device comprises a telescopic push rod 13 fixed at the wellhead, and The slider 12 to which the end of the telescopic push rod 13 is connected.
  • the slider 12 includes a rectangular plate frame 12-2, an unloading track 12-1 fixedly connected to the side of the plate frame 12-2, and four corners of the plate frame 12-2 are respectively provided with four
  • the roller of the "U"-shaped groove 12-3, the upper and lower ends of the plate frame 12-2 are respectively provided with upper and lower "door” type guide rails 12-4, 12-5 for restricting the left and right movement of the roller 12-3 in the horizontal direction.
  • FIG. 2 and 3 it is a front view and a side view of a large tonnage narrow-length outer power type rail unloading bucket, and the top of the bucket is a first rope suspension connecting plate 3 for connecting the lifting wire rope, and the first rope suspension connecting plate 3 Below is the load port and the coal baffle 4 for coal stop when loading coal. The coal enters the bucket box from the load port.
  • the bucket box is divided into the upper box 1 and the lower box 2, and the upper and lower boxes are
  • the bodies 1 and 2 are connected by a flange 5, the outer body of the bucket is reinforced around the welded channel steel 9, the lower part of the lower box 2 is provided with an unloading port, the unloading port is provided with a self-locking gate 6, and the bottom of the unloading port is a coal sluice device 7. Below the coal sluice device 7, there is a tail rope suspension connecting plate 8 connecting the tail ropes.
  • Figure 4 shows the flange connection structure of the upper and lower tanks of the bucket.
  • the bottom of the upper casing 1 and the top of the lower casing 2 are connected by a flange 5, and a plurality of bolt holes are arranged on the flange;
  • the upper case 1 and the lower case 2 are connected through the holes of the flange 5 as shown in FIG.
  • Fig. 6 and Fig. 7 are connection diagrams of the inner liner and the outer layer of the bucket, the wall of the bucket body has two layers, the inner liner 10-1 and the outer panel 10-2, and the inner liner 10
  • a plurality of pins 11 are welded to the edge of the -1, and holes corresponding to the pins 11 of the inner liner 10-1 are sequentially disposed on the outer layer 10-2, and the pin 11 passes through the outer layer of the bucket 10-2.
  • the upper hole, the end of the pin 11 is provided with a pin 11-1 to integrally connect the inner liner 10-1 and the outer layer plate 10-2.
  • Figure 8 is a connection diagram of the gate opening device, the telescopic push rod 13 is fixed at the wellhead, and a slider 12 is connected to the end of the telescopic push rod 13;
  • the slider 12 includes a rectangular plate frame 12-2, the plate frame 12-2 -
  • the side is fixed with the unloading track 12-1, and the four corners of the plate frame 12-2 are respectively provided with four rollers 12-3 with "U” shaped grooves, and the upper and lower ends of the roller 12-3 are provided with the level of the restraining rollers. Run the upper and lower " ⁇ " type rails 12-4, 12-5.
  • the unloading bucket When the unloading bucket is located at the bottom of the mine for coal loading, the coal is loaded through the coal dividing device of the metering bucket, and the coal enters the tank from the bucket loading port, at which time the self-locking gate 6 is self-locking; when the coal is filled with the entire bucket After the box, the bucket is pulled up by the wire rope and runs to the wellhead to start unloading.
  • the self-locking gate 6 is always self-locking by the action of coal pressure, and does not open itself during the lifting process.
  • the unloading roller 6-2 on the bucket self-locking gate 6 enters the unloading rail 12-1, and the telescopic push rod 13 starts to push the slider 12 to move in the horizontal direction.
  • the bucket continues to rise, the unloading roller 6-1 moves upward in the unloading rail 12-1 and performs a combined motion in two directions of horizontal movement, the self-locking gate 6 is unlocked, the sector gate panel 6-1 is opened, and the unloading is started.
  • the coal in the bucket body is unloaded from the unloading port along the coal slinger 7 until the unloading is completed.
  • the telescopic push rod 13 is retracted, the bucket moves downward, the self-locking gate 6 is closed, and the bucket moves to the bottom of the well to enter the next working cycle.

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  • Chutes (AREA)
  • Warehouses Or Storage Devices (AREA)
  • Loading Or Unloading Of Vehicles (AREA)
  • Ship Loading And Unloading (AREA)
  • Chain Conveyers (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Abstract

一种大吨位窄长外动力式轨道卸载箕斗，包括由内层衬板（10-1）和外层板（10-2）通过若干个销轴（11）固定成一体的上箱体（1）与下箱体（2）、自锁闸门（6）以及闸门开启装置。上箱体（1）上部开设有装载口以及用于装载煤时挡煤的挡煤板（4），下箱体（2）上设置由扇形闸门板（6-1）和卸载滚轮（6-2）组成的自锁闸门（6），自锁闸门（6）的下部设有溜煤装置（7），上、下箱体（1，2）通过法兰（5）连接，上、下箱体（1，2）外壁上均环绕焊接有槽钢（9）；箕斗在卸载位置时，外动力伸缩推杆（13）推动卸载滚轮（6-2）在滑块（12）的卸载轨道（12-1）内运动使自锁闸门（6）打开，煤沿溜煤装置（7）卸载。箕斗通过上、下箱体（1，2）的可靠连接，内层衬板（10-1）的有效便利固定，以及自锁闸门（6）的可靠打开，能够满足千万吨级大型矿井的要求。

Description

一种大吨位窄长外动力式曲轨卸载箕斗
技术领域
本发明涉及一种大吨位窄长外动力式轨道卸载箕斗， 尤其是一种适用于千万吨级大 型立井煤矿的动力式轨道卸载箕斗。
背景技术
目前， 煤矿生产向着大型、 高产、 高效方向发展， 大吨位箕斗逐渐应用于矿井提升， 而且随着煤矿生产的需要， 箕斗吨位还有进一步加大的趋势， 箕斗的体积也愈来愈大。 由于矿井截面增大空间有限， 这也导致了箕斗只能从长度上增加。 随着箕斗长度的不断 增加， 加大了制造成一体的大吨位箕斗的难度， 使箕斗的成本大幅度增加； 同时， 由于 箕斗内衬板受到煤的冲击， 磨损比较严重， 而现有的箕斗衬板采用螺栓连接， 衬板更换 比较麻烦； 另外， 目前使用的箕斗闸门打开装置由于受到箕斗停靠距离的变化影响， 造 成开启装置变形等。 因此， 目前的大型箕斗无法满足千万吨级大型矿井要求衬板更换方 便、 闸门打开平稳、 以及加工装配便利的问题。
发明内容
技术问题： 本发明的目的是要克服现有技术中的不足， 提供一种结构简单、 安全可 靠、 便于生产和安装、 经济实用， 可以适应煤矿大型化、 高产化和高效化发展的大吨位 箕斗。
技术方案： 本发明的大吨位窄长外动力式轨道卸载箕斗， 包括溜煤装置， 在所述溜 煤装置的上部连接有的箕斗箱体， 箕斗箱体的顶部设有首绳悬挂连接板， 溜煤装置的底 部设有尾绳悬挂连接板， 所述的箕斗箱体由上箱体和下箱体连接而成， 上、 下箱体外壁 上间隔环绕焊接有槽钢； 上箱体的上端口设有挡煤板， 下箱体的下端口设有位于溜煤装 置上部的自锁闸门及闸门开启装置， 所述的自锁闸门包括扇形闸门板） 和卸载滚轮， 卸 载滚轮焊接在扇形闸门板对称中心线的下方； 所述的闸门开启装置包括固定在井口的伸 缩推杆、 与伸缩推杆端部连接的滑块。
所述的箕斗箱体包括内层衬板和外层板， 外层板上设有多个与内层衬板固定在一起 的销轴， 每个销轴上均设有固定在外层板上的销钉。
所述的滑块包括矩形状的板架、 固定连接在板架一侧的卸载轨道， 板架的四个角上 分别设有四个开有 "U"形槽的滚轮，板架上下两端分别设有约束滚轮沿水平方向左右移 动的上、 下 " n "型导轨。 有益效果： 通过上、 下箱体的可靠连接， 衬板的有效便利固定， 以及间门的可靠打 开， 满足千万吨级大型矿井要求， 主要优点有：
(1)箕斗的上下箱体分离， 采用法兰连接， 便于生产制造、 运输和安装；
(2)内层衬板采用销轴固定， 避免了在衬板上开孔， 利用销钉将内层衬板与外层板固 定连接， 也易于衬板的更换；
(3)箕斗在卸载时采用外动力伸缩推杆和轨道卸载的滑块， 集成了曲轨卸载的快速性 与外动力卸载的小冲击特性， 保证了箕斗卸载的安全可靠性。
附图说明
图 1为本发明的大吨位窄长外动力式轨道卸载箕斗总图。
图 2为本发明的大吨位窄长外动力式轨道卸载箕斗主视结构图。
图 3为本发明的大吨位窄长外动力式轨道卸载箕斗侧视结构图。
图 4为本发明的箕斗上箱体和下箱体法兰连接结构图。
图 5为图 4的局部法兰连接结构图。
图 6本发明的箕斗内层衬板和外层板连接布置主视局部放大图。
图 7本发明的箕斗内层衬板和外层板连接布置俯视结构图。
图 8本发明的闸门开启装置连接图。
图中： 1-上箱体， 2-下箱体， 3-首绳悬挂连接板， 4-挡煤板， 5-法兰， 6-自锁闸门， 6-1-扇形闸门板， 6-2-卸载滚轮， 7-溜煤装置， 8-尾绳悬挂连接板， 9-槽钢， 10-1-内层衬 板， 10-2-外层板， 11-销轴， 11小销钉， 12-滑块， 12-1-卸载轨道， 12-2-板架， 12-3-滚轮， 12-4上 " Π "型导轨， 12-5-下 " Π "型导轨， 13-伸缩推杆。
具体实施方式
下面结合附图对本发明的一个实施例作进一步的描述：
本发明的大吨位窄长外动力式轨道卸载箕斗， 主要由箕斗箱体、 首绳悬挂连接板 3、 自锁间门 6、 溜煤装置 7、 尾绳悬挂连接板 8及间门开启装置构成。 所述箕斗箱体设在溜 煤装置 7的上部， 首绳悬挂连接板 3设在箕斗箱体的顶部， 尾绳悬挂连接板 8设在溜煤 装置 7的底部， 首绳悬挂连接板 3和尾绳悬挂连接板 8用于连接提升钢丝绳。 所述的箕 斗箱体由上箱体 1和下箱体 2连接而成， 所述的箕斗箱体包括内层衬板 10-1和外层板 10-2, 外层板 10-2上设有多个与内层衬板 10-1固定在一起的销轴 11， 每个销轴 11上均 设有固定在外层板 10-2上的销钉 11-1。上箱体 1和下箱体 2的外壁上均间隔环绕焊接有 槽钢 9; 上箱体 1的上端口设有挡煤板 4， 下箱体 2的下端口设有位于溜煤装置 7上部的 自锁闸门 6及闸门开启装置， 所述的自锁闸门 6包括扇形闸门板 6-1和卸载滚轮 6-2， 卸 载滚轮 6-2焊接在扇形闸门板 6-1对称中心线的下方；所述的闸门开启装置包括固定在井 口的伸缩推杆 13、 与伸缩推杆 13端部连接的滑块 12。所述的滑块 12包括矩形状的板架 12-2、 固定连接在板架 12-2—侧的卸载轨道 12-1， 板架 12-2的四个角上分别设有四个开 有 "U"形槽的滚轮 12-3，板架 12-2上下两端分别设有约束滚轮 12-3沿水平方向左右移 动的上、 下 "门 "型导轨 12-4、 12-5。
如图 2和 3所示， 是大吨位窄长外动力式轨道卸载箕斗的主视图和侧视图， 箕斗的 最上方为连接提升钢丝绳的首绳悬挂连接板 3，首绳悬挂连接板 3下方为装载口和用于装 载煤时挡煤的挡煤板 4， 煤从装载口进入箕斗箱体， 箕斗箱体分为上箱体 1和下箱体 2， 上、 下两个箱体 1、 2通过法兰 5连接组成， 箕斗箱体外环绕焊接槽钢 9加固， 下箱体 2 下部设有卸载口， 卸载口处安装有自锁闸门 6， 卸载口下方是溜煤装置 7， 溜煤装置 7下 方设有连接尾绳的尾绳悬挂连接板 8。
图 4所示为箕斗上箱体和下箱体法兰连接结构图， 上箱体 1的底部和下箱体 2的顶 部通过法兰 5连接， 法兰上布置有若干个螺栓孔； 螺栓穿过法兰 5的孔将上箱体 1和下 箱体 2连接， 如图 5所示。
图 6图 7所示为箕斗内层衬板和外层板连接图，箕斗箱体壁有两层板，内层衬板 10-1 和外层板 10-2， 内层衬板 10-1边缘上焊接有若干根销轴 11， 外层板 10-2上依次设置与 内层衬板 10-1上销轴 11对应的孔， 销轴 11穿过箕斗外层板 10-2上的孔， 销轴 11的端 部设置有销钉 11-1将内层衬板 10-1和外层板 10-2连接成一体。
图 8所示为闸门开启装置连接图， 伸缩推杆 13固定在井口、 与伸缩推杆 13端部连 接有一个滑块 12; 滑块 12包括矩形的板架 12-2， 板架 12-2—侧固定有卸载轨道 12-1， 板架 12-2的四个角上分别设有四个开有 "U"形槽的滚轮 12-3，滚轮 12-3上下两端设有 约束滚轮水平运行的上、 下 " Π "型导轨 12-4、 12-5。
当卸载箕斗位于矿井底部进行煤装载时， 将煤通过定量斗的分煤装置进行装载， 煤 从箕斗装载口进入箱体内， 此时自锁闸门 6 自锁； 当煤装满整个箕斗箱体后， 箕斗由钢 丝绳牵引上升， 运行到井口开始卸载。 箕斗在提升过程中， 自锁闸门 6受到煤压力作用 始终保持自锁， 在提升过程中不会自行打开。 当箕斗进入卸载过程时， 箕斗自锁闸门 6 上的卸载滚轮 6-2进入卸载轨道 12-1， 伸缩推杆 13开始推动滑块 12沿水平方向运动， 箕斗继续上升， 卸载滚轮 6-1在卸载轨道 12-1内向上运动并且做水平运动两个方向的复 合运动， 自锁闸门 6解除自锁， 扇形闸门板 6-1打开， 开始卸载。 箕斗箱体内的煤从卸 载口沿着溜煤装置 7进行卸载，直到卸载完成。卸载后伸缩推杆 13回缩，箕斗向下运动， 自锁闸门 6关闭， 箕斗运动到井底进入下一工作循环。

Claims

权利要求书
1、 一种大吨位窄长外动力式轨道卸载箕斗， 包括溜煤装置 （7)、 设在井口的闸门开 启装置， 闸门开启装置包括对称设在井口两侧的伸缩推杆 (13)、 与伸缩推杆 (13)端部连接 的滑块 (12)， 其特征在于： 在所述溜煤装置 （7 ) 的上部连接有的箕斗箱体， 箕斗箱体的 顶部设有首绳悬挂连接板 （3 )， 溜煤装置 （7 ) 的底部设有尾绳悬挂连接板 （8)， 所述的 箕斗箱体由上箱体 (1)和下箱体 （2 ) 连接而成， 上、 下箱体外壁上间隔环绕焊接有槽钢 (9)； 上箱体 (1)的上端口设有挡煤板 （4)， 下箱体 （2) 的下端口设有位于溜煤装置 （7 ) 上部的自锁闸门 (6)， 所述的自锁闸门 (6)包括扇形闸门板 ( 6-1 ) 和卸载滚轮 (6-2)， 卸载滚 轮 (6-2)焊接在扇形闸门板 （6-1 ) 对称中心线的下方。
2、 根据权利要求 1 所述的大吨位窄长外动力式轨道卸载箕斗， 其特征在于： 所述的 箕斗箱体包括内层衬板 (10-1)和外层板 (10-2)， 外层板 (10-2)上设有多个与内层衬板 (10-1) 固定在一起的销轴 (11)， 每个销轴 (11)上均设有固定在外层板 (10-2)上的销钉。
3、 根据权利要求 1 所述的大吨位窄长外动力式轨道卸载箕斗， 其特征在于： 所述的 滑块 (12)包括矩形状的板架 (12-2)、 固定连接在板架 (12-2)—侧的卸载轨道 (12-1)， 板架 (12- 2)的四个角上分别设有四个开有 "U"形槽的滚轮 (12-3)， 板架 (12-2)上下两端分别设有约 束滚轮 (12-3)沿水平方向左右移动的上、 下 " Π "型导轨 (12-4、 12-5)。
PCT/CN2014/074090 2013-11-25 2014-03-26 一种大吨位窄长外动力式曲轨卸载箕斗 Ceased WO2015074358A1 (zh)

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