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CN-121974114-A - Pull rope positioning switch and pull rope control mechanism of belt conveyor

CN121974114ACN 121974114 ACN121974114 ACN 121974114ACN-121974114-A

Abstract

The invention discloses a pull rope positioning switch and a pull rope control mechanism of a belt conveyor, wherein the pull rope positioning switch at least comprises a fixed plate, a pulley block, an optical fiber assembly and a cam hook assembly, the middle fixed pulley block comprises two fixed pulleys which are horizontally arranged, the fixed pulleys are rotatably arranged on the fixed plate through fixed pulley shafts, two groups of movable pulley blocks are connected to a guide groove of the fixed plate in a vertically sliding mode, the cam hook assembly comprises a cam which is rotatably arranged on the fixed plate through a cam shaft, a hook claw hinged to the cam, the hook claw is hooked on an optical fiber between the two fixed pulleys, the belt conveyor pull rope control mechanism comprises a conveyor frame, a plurality of steel wire rope decycles are fixed on the conveyor frame, one end of a steel wire rope in the pull rope positioning switch is connected with a crank arm, and the other end of the steel wire rope sequentially penetrates through a plurality of steel wire rope decycles and then extends to a region convenient to be manually pulled and is connected with a guard rail on the outer side of the conveyor frame.

Inventors

  • LIU JUNLI
  • WANG YANAN
  • YAN YANYAN

Assignees

  • 河南理工大学

Dates

Publication Date
20260505
Application Date
20260209

Claims (10)

  1. 1. A pull-cord positioning switch is characterized by at least comprising: The optical fiber cable fixing device comprises a fixing plate, a fixing plate and a cam hook claw assembly, wherein the fixing plate is used for installing a fixing pulley block, an optical fiber assembly and the cam hook claw assembly; The pulley block comprises a middle fixed pulley block and two movable pulley blocks at two sides, wherein the middle fixed pulley block comprises two fixed pulleys which are horizontally arranged, and the fixed pulleys are rotatably arranged on a fixed plate through fixed pulley shafts; The optical fiber assembly comprises fixed-length optical fibers, and the horizontal arm is arranged above the two fixed pulleys and is fixed by winding out from the lower parts of the movable pulleys on the two sides; the cam hook claw assembly comprises a cam rotatably arranged on the fixed plate through a cam shaft, and a hook claw hinged on the cam, wherein the hook claw is hooked on an optical fiber between two fixed pulleys; When the cam action makes the claw act downwards, the claw pulls the optical fiber to act downwards, and then the movable pulley is pulled to translate upwards so as to reduce the bending of the optical fiber and trigger the detection signal.
  2. 2. The pull rope positioning switch of claim 1, wherein the pull rope positioning switch further comprises a fixed shell, the fixed plate is fixedly connected to the inner side wall of the fixed shell, two track grooves are symmetrically formed in the fixed plate and are respectively arranged on one side, relatively far away from the two fixed pulleys, the two movable pulleys are rotatably connected with the track grooves through rotating shafts, the rotating shafts can slide along the length direction of the track grooves, and the length direction of the track grooves is consistent with the height direction of the fixed plate.
  3. 3. The pull-cord positioning switch of claim 2, wherein the fixed housing is in the shape of a rectangular column housing, a detachable front baffle is arranged at the front end of the fixed housing, and a connecting lug is arranged at the bottom end of the fixed housing and is fixedly installed through the connecting lug.
  4. 4. The pull rope positioning switch of claim 2 or 3, wherein the two side walls of the fixed shell are respectively provided with an optical fiber hole for the optical fiber to extend in or out, and an optical fiber fixing seat for fixing the optical fiber is fixedly connected in the optical fiber holes.
  5. 5. The pull rope positioning switch according to any one of claims 2 and 3, wherein the pull rope positioning switch further comprises a reset component, the reset component comprises a tension spring, the bottom end of the tension spring is connected with the end wall of the bottom end inside the fixed shell, the top end of the tension spring is connected with the rotating shaft and enables the rotating shaft to be positioned at the bottommost end of the track groove under the action of gravity of the movable pulley, the tension spring is in a natural compression state at the moment, and when the rotating shaft is positioned at the bottommost end of the track groove, the height of a wheel groove at the bottom end of the movable pulley is lower than that of a wheel groove at the top end of the fixed pulley.
  6. 6. The pull-cord positioning switch of claim 3, further comprising a control assembly comprising a crank and a claw, wherein one end of the cam shaft is connected with the fixed plate or the fixed shell inner wall through a pin, and the other end of the cam shaft extends out from the front baffle and is fixedly connected with the center position of the crank.
  7. 7. The pull rope positioning switch of claim 6, wherein the crank is symmetrically provided with crank arms on two sides of the periphery of the crank and is connected with one end of a steel wire rope through the crank arms, and the other end of the steel wire rope extends to a region convenient for manual pulling.
  8. 8. The pull rope positioning switch of claim 6, wherein a torsion spring is arranged between the crank and the front baffle, the torsion spring is sleeved outside the cam shaft, one end of the torsion spring is connected with the front baffle, the other end of the torsion spring is connected with the crank, and a handle for controlling the crank to rotate is fixedly connected on the outer side wall of the crank or the outer side wall of the cam shaft.
  9. 9. A belt conveyor stay cord control mechanism using the stay cord positioning switch of claim 7 is characterized in that the belt conveyor stay cord control mechanism comprises a conveyor frame, the length direction of the conveyor frame is consistent with the conveying direction of a conveyor, a fixed shell in the stay cord positioning switch is fixed on the conveyor frame through a connecting lug, a plurality of steel wire rope decycles are fixed on the conveyor frame at equal intervals along the length direction of the conveyor frame, one end of the steel wire rope in the stay cord positioning switch is connected with a crank arm, and the other end of the steel wire rope sequentially penetrates through the plurality of steel wire rope decycles and then extends to an area convenient for manual pulling and is connected with a guard rail on the outer side of the conveyor frame.
  10. 10. The belt conveyor stay cord control mechanism of claim 9, wherein the plurality of stay cord positioning switches are arranged, the plurality of stay cord positioning switches are sequentially arranged along the length direction of the conveyor frame, a plurality of steel wire rope decycles fixed on the conveyor frame are arranged between adjacent stay cord positioning switches, one crank arm of each adjacent stay cord positioning switch is connected through a steel wire rope, the steel wire rope is arranged in the plurality of steel wire rope decycles in a penetrating manner, and the other crank arm of each adjacent stay cord positioning switch is connected with the adjacent stay cord positioning switch or the guard rail on the other side through the steel wire rope.

Description

Pull rope positioning switch and pull rope control mechanism of belt conveyor Technical Field The invention relates to the field of mining equipment, in particular to a stay cord positioning switch and a stay cord control mechanism of a belt conveyor. Background The belt conveyor is core material conveying equipment in the fields of mines, ports, power plants and the like, the pull rope positioning switch is a key safety protection device, and when the conveyor has faults such as deviation, material clamping, personnel mistakenly entering and the like, an operator pulls the pull rope to trigger the switch, so that the conveyor is stopped in an emergency, and the accident is prevented from being enlarged. The traditional pull rope positioning switch adopts mechanical contacts or electronic sensing elements (such as a proximity switch and a photoelectric switch) to realize signal triggering, but has the defects that the electronic elements are easily affected by bad working conditions, the positioning precision is insufficient, the maintenance cost is high and the like. In the prior art, the optical fiber sensing technology is gradually applied to the field of industrial detection due to the characteristics of strong anti-interference capability and severe environment resistance, but no switch structure is available yet to realize reliable triggering and resetting of the optical fiber sensing technology, so that a switch structure for controlling the on-off state of an optical fiber is necessary to be studied to solve the problems. Disclosure of Invention The invention aims to solve the problems and provide a stay cord positioning switch and a stay cord control mechanism of a belt conveyor, which are simple to operate and avoid signal interference. In order to achieve the above object, the technical scheme of the present invention is as follows: A pull-cord positioning switch, comprising at least: The optical fiber cable comprises a fixed plate, a fixed pulley block, an optical fiber component, a cam hook component and a reset component, wherein guide grooves are formed in two sides of the fixed plate along the vertical direction; The pulley block comprises a middle fixed pulley block and two movable pulley blocks at two sides, wherein the middle fixed pulley block comprises two fixed pulleys which are horizontally arranged, and the fixed pulleys are rotatably arranged on a fixed plate through fixed pulley shafts; The optical fiber assembly comprises fixed-length optical fibers, and the horizontal arm is arranged above the two fixed pulleys and is fixed by winding out from the lower parts of the movable pulleys on the two sides; the cam hook claw assembly comprises a cam rotatably arranged on the fixed plate through a cam shaft, and a hook claw hinged on the cam, wherein the hook claw is hooked on an optical fiber between two fixed pulleys; When the cam action makes the claw act downwards, the claw pulls the optical fiber to act downwards, and then the movable pulley is pulled to translate upwards so as to reduce the bending of the optical fiber and trigger the detection signal. Further, stay cord positioning switch still includes fixed casing, and fixed plate fixed connection is on fixed casing inside wall, and the symmetry is provided with two track grooves and two track grooves set up respectively in the relative one side that keeps away from of two fixed pulleys, and two movable pulleys pass through rotation axis and track groove rotatable coupling and the rotation axis can slide along the length direction in track groove, and the length direction in track groove is consistent with the direction of height of fixed plate. Further, the fixed casing is rectangular column casing form, and the front end of fixed casing is provided with the front baffle that can dismantle, and fixed casing bottom is provided with the engaging lug and installs fixedly through the engaging lug. Further, the optical fiber holes for the optical fibers to extend in or out are formed in the side walls of the two sides of the fixed shell, and the optical fiber fixing seats for installing and fixing the optical fibers are fixedly connected in the optical fiber holes. Further, the pull rope positioning switch further comprises a reset component, the reset component comprises a tension spring, the bottom end of the tension spring is connected with the end wall of the bottom end inside the fixed shell, the top end of the tension spring is connected with the rotating shaft and enables the rotating shaft to be located at the bottommost end of the track groove under the action of gravity of the movable pulley, the tension spring is in a natural compression state at the moment, and when the rotating shaft is located at the bottommost end of the track groove, the bottom end wheel groove height of the movable pulley is lower than the top end wheel groove height of the fixed pulley. Further, the stay cord positioning switch also comprises a cont