A super prestressed support device and method

Abstract

The present invention discloses a super prestressed support device, which comprises a bottom plate, a tray clamp, an anchor feeding mechanism and a tensioning mechanism; a through hole penetrating the upper and lower surfaces of the bottom plate is formed in the bottom plate, the diameter of the through hole is larger than the diameter of the anchor cable, a first lifting rod is fixedly connected to the upper part of the bottom plate, the telescopic direction of the first lifting rod is parallel to the central axis of the through hole, and the upper end of the first lifting rod is fixedly connected to the tray clamp; the tray clamp matches the shape of the lower surface of the tray, and the central axis of the tray clamp coincides with the central axis of the through hole; an anchor feeding mechanism is further arranged on the upper part of the bottom plate, the anchor feeding mechanism matches the anchor cable, and the central axis of the anchor feeding mechanism coincides with the through hole; the lower part of the bottom plate is fixedly connected to the tensioning mechanism, the tensioning mechanism matches the anchor cable, and the central axis of the tensioning mechanism coincides with the through hole. The problem of low working efficiency of the existing anchor cable support device is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of roadway support, and particularly relates to a super prestressed support device and method. Background Art

[0002] At present, the prestress of bolts used for coal mine roadway support is 10 kN - 20 kN, and the prestress of anchor cables is 50 kN - 300 kN, with a service life of about 2 years.

[0003] With the increasing coal mining depth year by year, the stability of deep roadway surrounding rock shows completely different differences from that of shallow surrounding rock. The deep surrounding rock shows characteristics of continuous flowing deformation and extremely difficult support, and the traditional support strength cannot meet the stability of roadway surrounding rock under high stress conditions. The prestress of the anchor cables used for slope dams is about 900 kN, and the service life can reach 100 - 500 years. If the anchor cables used for slope dams can be used for coal mine roadway support, the problem of difficult support for deep roadway surrounding rock will be solved.

[0004] However, there are the following problems when using the anchor cables of slope dams for deep roadway surrounding rock support:

[0005] The existing anchor cable support devices for feeding the anchor, installing the tray and tensioning are separated. Each time an action is completed, the feeding device and the tensioning device need to be disassembled. Since the weight of the anchor cable tray with a prestress of 900 kN is relatively large, it is difficult to disassemble. Coupled with the fact that the tray can only be installed by manual lifting, the working efficiency of the existing anchor cable support device in the roadway is low. Summary of the Invention

[0006] In order to solve the above-mentioned shortcomings and deficiencies of the prior art, the purpose of the present invention is to provide a super prestressed support device and method.

[0007] The technical solution of the present invention is: a super prestressed support device, the device includes a bottom plate, a tray fixture, a feeding mechanism and a tensioning mechanism;

[0008] A through hole penetrating the upper and lower surfaces of the bottom plate is opened on the bottom plate, the diameter of the through hole is larger than the diameter of the anchor cable, a first lifting rod is fixedly connected to the upper part of the bottom plate, the telescopic direction of the first lifting rod is parallel to the central axis of the through hole, and the upper end of the first lifting rod is fixedly connected to the tray fixture;

[0009] The tray fixture matches the shape of the lower surface of the tray, and the central axis of the tray fixture coincides with the central axis of the through hole;

[0010] A feeding mechanism is further provided on the upper part of the bottom plate, the feeding mechanism matches the anchor cable, and the central axis of the feeding mechanism coincides with the through hole;

[0011] A tensioning mechanism is fixedly connected to the lower part of the bottom plate. The tensioning mechanism is matched with the anchor cable, and the central axis of the tensioning mechanism coincides with the through hole.

[0012] Specifically, the tray fixture is annular, and the inner diameter of the tray fixture is matched with the protruding part on the lower surface of the tray.

[0013] Furthermore, a rubber pad is provided on the upper surface of the tray fixture;

[0014] Fourth lifting rods are provided on the lower surface of the bottom plate. There are 4 fourth lifting rods, which are distributed at the four corners of the bottom plate. The lower ends of the fourth lifting rods are fixedly connected to the support plate, and the lower surface of the support plate is perpendicular to the length direction of the fourth lifting rods.

[0015] Specifically, the anchor cable feeding mechanism includes a controller, a position feedback sensor, second lifting rods, and an anchor cable gripper;

[0016] There are two second lifting rods. The two second lifting rods are arranged on both sides of the through hole. Anchor cable grippers are respectively connected to the upper ends of the two second lifting rods. The telescopic direction of the second lifting rods is parallel to the central axis of the through hole, and the second lifting rods are electrically connected to the controller;

[0017] The position feedback sensor is arranged on the second lifting rod and is electrically connected to the controller.

[0018] Specifically, the anchor cable gripper includes a touch switch, a support arm, a spring piece, a first movable rod, a second movable rod, a first clamping block, a second clamping block, a stepping motor, a lead screw, a slider, and a control arm;

[0019] One end of the support arm is fixedly connected to the upper end of the second lifting rod. The support arm is perpendicular to the second lifting rod. A clamping rotating shaft is provided on the upper surface of the support arm far from the second lifting rod, and the rotating shaft is parallel to the second lifting rod;

[0020] The first movable rod and the second movable rod are rotatably connected to the clamping rotating shaft;

[0021] The first clamping block is fixedly connected to one end of the first movable rod far from the second lifting rod. The second clamping block is fixedly connected to one end of the second movable rod far from the second lifting rod. A semi-circular arc is formed on the first clamping block, and the opening of the semi-circular arc faces the second clamping block. The central axis of the semi-circular arc is parallel to the central axis of the through hole. The second clamping block is symmetric with the first clamping block on the left and right. When the first clamping block and the second clamping block are in contact with each other, the semi-circular arcs on the first clamping block and the second clamping block enclose a cylindrical hole, and the central axis of the cylindrical hole coincides with the central axis of the through hole;

[0022] The spring piece is arranged between the first movable rod and the second movable rod, and the elastic force direction of the spring piece is consistent with the direction in which the first movable rod and the second movable rod open;

[0023] The stepping motor is fixedly connected to the support arm. The axis of the stepping motor is parallel to the length direction of the support arm. A lead screw is fixedly connected to the axis of the stepping motor. The central axis of the lead screw coincides with the central axis of the axis of the stepping motor. The stepping motor is electrically connected to the controller;

[0024] The slider is slidably connected to the support arm. A first threaded hole is opened on the slider. The first threaded hole penetrates the slider in the length direction of the support arm. The first threaded hole matches the lead screw, and the lead screw is threadedly connected to the first threaded hole;

[0025] There are 2 control arms. The two control arms are symmetrically distributed with the support arm as the central axis. The control arm includes a first rod and a second rod. The first rod and the second rod are connected to form an L shape. The first rod is fixedly connected to the slider. The second rod contacts the outer side surface of the first movable rod or the second movable rod. The second rod of the control arm is located on the side of the clamping rotating shaft close to the second lifting rod;

[0026] The touch switch is fixedly connected to the support arm. When the control arm drives the first clamping block to contact the second clamping block, the slider is at point A on the support arm. The position of the touch switch is at point A on the support arm. The touch switch is normally closed and is electrically connected to the controller.

[0027] Further, the second rod is perpendicular to the first movable rod and the second movable rod.

[0028] Further, a roller with a central axis coinciding with the central axis of the second rod is provided on the second rod.

[0029] Specifically, the tensioning mechanism includes a third lifting rod and a fastening plate;

[0030] There are two third lifting rods. One end of the third lifting rod is fixedly connected to the lower surface of the bottom plate. The two third lifting rods are located on both sides of the through hole. The third lifting rod is parallel to the central axis of the through hole. The lower end of the third lifting rod is fixedly connected to the fastening plate;

[0031] The central axis of the fastening plate is perpendicular to the central axis of the through hole.

[0032] Specifically, the fastening plate includes a plate body and a clamping block;

[0033] The diameter of the plate body is greater than the distance between the two third lifting rods. A perforation penetrating the upper and lower surfaces of the plate body is opened at the center of the plate body. The diameter of the perforation is greater than the diameter of the cable. A chute penetrating the upper and lower surfaces of the plate body is provided on the side wall of the perforation. The two side walls of the chute at the perforation are parallel to the central axis of the perforation. The side wall of the chute opposite to the perforation is an inclined surface. The distance from the upper edge of the inclined surface to the center of the plate body is less than the distance from the lower edge of the inclined surface to the center of the plate body;

[0034] The clamping block is trapezoidal, the thickness of the clamping block matches the distance between the two side walls of the chute, one waist of the clamping block is perpendicular to the bottom surface of the clamping block, the included angle between the other waist of the clamping block and the bottom surface of the clamping block is the same as the included angle between the inclined surface and the bottom surface of the disc body, the height of the clamping block is greater than the height of the disc body, and an arc surface matching the cable anchor is provided on the waist of the clamping block perpendicular to the bottom surface.

[0035] A support method for the super prestressed support device described in a claim, the method comprising the following steps:

[0036] S01. Set the initial positions of the two second lifting rods such that one is in the maximum extended state and the other is in the maximum contracted state;

[0037] S02. Pass the cable anchor through the through hole and then through the central axes of the 2 cable anchor grippers;

[0038] S03. Manually feed the cable anchor into the drill hole until it can no longer be advanced;

[0039] S04. The controller controls the cable anchor gripper on the second lifting rod in the maximum contracted state to grip the cable anchor tightly; controls the cable anchor gripper on the second lifting rod in the maximum extended state to open to the maximum angle. Let the first state be that the second lifting rod is in the maximum extended state and the cable anchor gripper is open to the maximum angle, and the second state be that the second lifting rod is in the maximum contracted state and the cable anchor gripper has the minimum clamping angle;

[0040] S05. The controller controls the second lifting rod in the second state to extend until the corresponding position feedback sensor detects that the extended length of the second lifting rod reaches the maximum value, controls the second lifting rod in the first state to contract until the corresponding position feedback sensor detects that the extended length of the second lifting rod reaches the minimum value, swap the states of the two second lifting rods, and jump to step S05 until the cable anchor is sent to the specified position or an external termination command is received;

[0041] Wherein, the method for judging the state of the second lifting rod is that if the corresponding position feedback sensor of the second lifting rod detects that the extended length of the second lifting rod reaches the maximum value and the state of the corresponding touch switch is off, then the state of the second lifting rod is the first state; if the corresponding position feedback sensor of the second lifting rod detects that the extended length of the second lifting rod reaches the minimum value and the state of the corresponding touch switch is on, then the state of the second lifting rod is the second state.

[0042] The beneficial effects of the present invention are as follows: Compared with the prior art, in the present invention, the cable anchor is sent into the drill hole through the cable anchor feeding mechanism, then the cable anchor is tensioned by the tensioning mechanism, and then the tray is lifted to the drill hole position by the tray fixture for fixation to complete the cable anchor support. The present invention integrates cable anchor feeding, tensioning and tray installation. It can not only send the cable anchor into the drill hole through the cable anchor feeding mechanism, but also send the tray placed on the tray fixture to the drill hole through the first lifting device. The whole process does not require any device disassembly and manual tray lifting, and the work efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a three-dimensional structure diagram of the present invention;

[0044] Figure 2 is Figure 1 a partial view at A in

[0045] Figure 3 is a three-dimensional structure diagram of another perspective of the present invention;

[0046] Figure 4 is Figure 3 a partial view at B in

[0047] Figure 5 is a three-dimensional structure diagram of another perspective of the present invention;

[0048] Figure 6 is Figure 5 a partial view at C in

[0049] Figure 7 is a three-dimensional structure diagram of another perspective of the present invention;

[0050] Figure 8 is Figure 7 a partial view at D in

[0051] Figure 9 is Figure 7 a partial view at E in

[0052] Figure 10 is a circuit connection block diagram of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0053] The present invention will be further described below in conjunction with the drawings and specific embodiments:

[0054] Embodiment 1:

[0055] In order to solve the problem of low working efficiency of the cable anchor support device in the prior art, refer to Figures 1-10, the present invention adopts a super prestressed support device, and the device includes a bottom plate 1, a tray fixture 2-1, an anchor feeding mechanism 4 and a tensioning mechanism 5; a through hole 1-1 penetrating the upper and lower surfaces of the bottom plate 1 is formed on the bottom plate 1, the diameter of the through hole 1-1 is larger than the diameter of the anchor cable 7, a first lifting rod 2-2 is fixedly connected to the upper part of the bottom plate 1, the telescopic direction of the first lifting rod 2-2 is parallel to the central axis of the through hole 1-1, and the upper end of the first lifting rod 2-2 is fixedly connected to the tray fixture 2-1; the tray fixture 2-1 matches the shape of the lower surface of the tray 3, and the central axis of the tray fixture 2-1 coincides with the central axis of the through hole 1-1; a feed anchor mechanism 4 is further arranged on the upper part of the bottom plate 1, the feed anchor mechanism 4 matches the anchor cable 7, and the central axis of the feed anchor mechanism 4 coincides with the through hole 1-1; the lower part of the bottom plate 1 is fixedly connected to a tensioning mechanism 5, the tensioning mechanism 5 matches the anchor cable 7, and the central axis of the tensioning mechanism 5 coincides with the through hole 1-1.

[0056] Specifically, the tray fixture 2-1 is annular, and the inner diameter of the tray fixture 2-1 matches the protruding part of the lower surface of the tray 3.

[0057] During use, the tray 3 can be maintained stable in the horizontal direction through the fixation of the tray fixture 2-1.

[0058] Furthermore, a rubber pad is arranged on the upper surface of the tray fixture 2-1; a fourth lifting rod 6-1 is arranged on the lower surface of the bottom plate 1, there are 4 fourth lifting rods 6-1, the 4 fourth lifting rods 6-1 are distributed at the four corners of the bottom plate 1, and the lower end of the fourth lifting rod 6-1 is fixedly connected to a support plate 6-2, and the lower surface of the support plate 6-2 is perpendicular to the length direction of the fourth lifting rod 6-1.

[0059] The rubber pad on the upper surface of the tray fixture 2-1 serves two purposes. One is to increase the friction between the tray fixture 2-1 and the tray 3, and the other is that when the tray 3 contacts the rock wall at the drilling hole, the tray fixture 2-1 will not rigidly contact the tray 3 and cause damage to the tray 3.

[0060] Specifically, the feed anchor mechanism 4 includes a controller 10, a position feedback sensor 8, a second lifting rod 4-1 and an anchor cable gripper 4-2; there are two second lifting rods 4-1, the two second lifting rods 4-1 are arranged on both sides of the through hole 1-1, the upper ends of the two second lifting rods 4-1 are respectively connected with an anchor cable gripper 4-2, the telescopic direction of the second lifting rod 4-1 is parallel to the central axis of the through hole 1-1, and the second lifting rod 4-1 is electrically connected to the controller 10; the position feedback sensor 8 is arranged on the second lifting rod 4-1, and the position feedback sensor 8 is electrically connected to the controller 10.

[0061] During use, the anchor cable 7 is fed into the drilling hole by alternately gripping with the cable anchor gripper and alternately lifting and lowering the second lifting rod 4-1.

[0062] Specifically, the cable anchor gripper 4-2 includes a touch switch 4-2-9, a support arm 4-2-13, a shrapnel 4-2-10, a first movable rod 4-2-3, a second movable rod 4-2-4, a first clamping block 4-2-5, a second clamping block 4-2-6, a stepper motor 4-2-11, a lead screw 4-2-12, a slider 4-2-2, and a control arm 4-2-8; one end of the support arm 4-2-13 is fixedly connected to the upper end of the second lifting rod 4-1, the support arm 4-2-13 is perpendicular to the second lifting rod 4-1, and a clamping rotating shaft 4-7 is provided on the upper surface of the support arm 4-2-13 away from the second lifting rod 4-1, and the rotating shaft is parallel to the second lifting rod 4-1; the first movable rod 4-2-3 and the second movable rod 4-2-4 are rotatably connected to the clamping rotating shaft 4-7; the first clamping block 4-2-5 is fixedly connected to one end of the first movable rod 4-2-3 away from the second lifting rod 4-1, the second clamping block 4-2-6 is fixedly connected to one end of the second movable rod 4-2-4 away from the second lifting rod 4-1, a semi-circular arc is formed on the first clamping block 4-2-5, the opening of the semi-circular arc faces the second clamping block 4-2-6, the central axis of the semi-circular arc is parallel to the central axis of the through hole 1-1, the second clamping block 4-2-6 is symmetric with the first clamping block 4-2-5 left and right, and when the first clamping block 4-2-5 and the second clamping block 4-2-6 are in contact with each other, the semi-circular arcs on the first clamping block 4-2-5 and the second clamping block 4-2-6 enclose a cylindrical hole, and the central axis of the cylindrical hole coincides with the central axis of the through hole 1-1; the shrapnel 4-2-10 is arranged between the first movable rod 4-2-3 and the second movable rod 4-2-4, and the elastic force direction of the shrapnel 4-2-10 is the same as the direction in which the first movable rod 4-2-3 and the second movable rod 4-2-4 open; the stepper motor 4-2-11 is fixedly connected to the support arm 4-2-13, the rotating shaft of the stepper motor 4-2-11 is parallel to the length direction of the support arm 4-2-13, a lead screw 4-2-12 is fixedly connected to the rotating shaft of the stepper motor 4-2-11, the central axis of the lead screw 4-2-12 coincides with the central axis of the rotating shaft of the stepper motor 4-2-11, and the stepper motor 4-2-11 is electrically connected to the controller 10; the slider 4-2-2 is slidably connected to the support arm 4-2-13, a first screw hole 4-2-1 is formed in the slider 4-2-2, the first screw hole 4-2-1 penetrates through the slider 4-2-2 in the length direction of the support arm 4-2-13, the first screw hole 4-2-1 matches the lead screw 4-2-12, and the lead screw 4-2-12 is threadedly connected to the first screw hole 4-2-1;The control arms 4-2-8 include two, and the two control arms 4-2-8 are symmetrically distributed with the support arm 4-2-13 as the central axis. The control arm 4-2-8 includes a first rod 4-2-8-1 and a second rod 4-2-8-2. The first rod 4-2-8-1 and the second rod 4-2-8-2 are connected to form an L shape. The first rod 4-2-8-1 is fixedly connected to the slider 4-2-2, and the second rod 4-2-8-2 contacts the outer side surface of the first movable rod 4-2-3 or the second movable rod 4-2-4. The second rod 4-2-8-2 of the control arm 4-2-8 is located on the side of the clamping rotating shaft 4-7 close to the second lifting rod 4-1; The touch switch 4-2-9 is fixedly connected to the support arm 4-2-13. When the control arm 4-2-8 drives the first clamping block 4-2-5 to contact the second clamping block 4-2-6, the slider 4-2-2 is at point A on the support arm 4-2-13. The position of the touch switch 4-2-9 is at point A on the support arm 4-2-13. The touch switch 4-2-9 is normally closed and is electrically connected to the controller 10.;

[0063] During use, the rotation of the stepper motor 4-2-11 drives the slider 4-2-2 to move along the length direction of the support arm. The movement of the slider 4-2-2 along the length direction of the support arm 4-2-13 drives the control arm 4-2-8 to squeeze the first movable rod 4-2-3 and the second movable rod 4-2-4 in a crossed scissor shape, reducing the included angle. The elastic force of the elastic piece 4-2-10 makes the included angle between the first movable rod 4-2-3 and the second movable rod 4-2-4 tend to increase. The first movable rod 4-2-3 and the second movable rod 4-2-4 act through a lever to clamp and release the first clamping block 4-2-5 and the second clamping block 4-2-6. The function of the touch switch 4-2-9 is to detect whether the first clamping block 4-2-5 and the second clamping block 4-2-6 are clamped.

[0064] Further, the second rod 4-2-8-2 is perpendicular to the first movable rod 4-2-3 and the second movable rod 4-2-4.

[0065] During use, the perpendicularity of the second rod 4-2-8-2 to the first movable rod 4-2-3 and the second movable rod 4-2-4 can ensure that the contact area remains unchanged during the process of the second rod 4-2-8-2 squeezing the first movable rod 4-2-3.

[0066] Further, a roller with a central axis coinciding with the central axis of the second rod 4-2-8-2 is provided on the second rod 4-2-8-2.

[0067] Here, the roller can reduce the friction between the second rod 4-2-8-2 and the first movable rod 4-2-3 and the second movable rod 4-2-4.

[0068] Specifically, the tensioning mechanism 5 includes a third lifting rod 5-2 and a fastening disc; there are two third lifting rods 5-2. One end of each third lifting rod 5-2 is fixedly connected to the lower surface of the bottom plate 1. The two third lifting rods 5-2 are located on both sides of the through hole 1-1. The third lifting rod 5-2 is parallel to the central axis of the through hole 1-1. The lower end of the third lifting rod 5-2 is fixedly connected to the fastening disc; the central axis of the fastening disc is perpendicular to the central axis of the through hole 1-1.

[0069] Here, the fastening disc bites tightly on the anchor cable 7, and then tensioning is carried out by extending the third lifting rod 5-2.

[0070] Specifically, the fastening disc includes a disc body 5-1 and a clamping block 5-3; the diameter of the disc body 5-1 is greater than the distance between the two third lifting rods 5-2. A through hole 5-1-2 penetrating the upper and lower surfaces of the disc body 5-1 is opened at the center of the disc body 5-1. The diameter of the through hole 5-1-2 is greater than the diameter of the anchor cable 7. A chute 5-1-1 penetrating the upper and lower surfaces of the disc body 5-1 is provided on the side wall of the through hole 5-1-2. The two side walls of the chute 5-1-1 at the through hole 5-1-2 are parallel to the central axis of the through hole 5-1-2. The side wall of the chute 5-1-1 opposite to the through hole 5-1-2 is an inclined surface. The distance from the upper edge of the inclined surface to the center of the disc body 5-1 is less than the distance from the lower edge of the inclined surface to the center of the disc body 5-1; the clamping block 5-3 is trapezoidal. The thickness of the clamping block 5-3 matches the distance between the two side walls of the chute 5-1-1. One waist of the clamping block 5-3 is perpendicular to the bottom surface of the clamping block 5-3. The included angle between the other waist of the clamping block 5-3 and the bottom surface of the clamping block 5-3 is the same as the included angle between the inclined surface and the bottom surface of the disc body 5-1. The height of the clamping block 5-3 is greater than the height of the disc body 5-1. An arc surface matching the anchor cable 7 is opened on the waist of the clamping block 5-3 perpendicular to the bottom surface.

[0071] During tensioning, due to the frictional force between the anchor cable 7 and the clamping block 5-3, the disc body 5-1 will move downward under the push of the third lifting rod 5-2, and the clamping block 5-3 will move upward along the upper part of the chute 5-1-1 relative to the chute 5-1-1. Due to the shape settings of the clamping block 5-3 and the slider 4-2-2, the closer the clamping block 5-3 moves upward along the chute 5-1-1, the closer the waist of the clamping block 5-3 perpendicular to the bottom surface will be to the center of the disc body 5-1. Therefore, the anchor cable 7 will be clamped tighter, with a self-locking effect. Therefore, the problem of the anchor cable 7 slipping will not occur during tensioning.

[0072] After tensioning is completed, pulling the disc body 5-1 by the pulling force of the third lifting rod 5-2 will cause the clamping block 5-3 to slide out of the chute 5-1-1.

[0073] In order to make it easier to separate the fastening disc from the anchor cable 7 after tensioning, further in this embodiment, a pressing plate 5-4 is installed in the sliding groove 5-1-1. The pressing plate 5-4 is parallel to the side of the clamping block 5-3 close to the side wall of the sliding groove 5-1-1. A second screw hole 5-1-3 is formed between each sliding groove 5-1-1 on the fastening disc and the side surface of the fastening disc. The second screw hole 5-1-3 is perpendicular to the central axis of the through hole 5-1-2. A fastening bolt 5-5 is threadedly connected in the second screw hole 5-1-3, and one end of the fastening bolt 5-5 is rotatably connected to the pressing plate 5-4.

[0074] During use, the clamping force between the clamping plate and the anchor cable 7 can be reduced by loosening the fastening bolt, so that the clamping block 5-3 is easy to disassemble.

[0075] A support method for the super prestressed support device described in one claim, the method comprising the following steps:

[0076] S01. Set the initial positions of the two second lifting rods 4-1 such that one is in the maximum extended state and the other is in the maximum retracted state;

[0077] S02. Pass the anchor cable 7 through the through hole 1-1 and then through the central axes of the 2 anchor cable grippers 4-2;

[0078] S03. Manually feed the anchor cable 7 into the drill hole until it can no longer be pushed forward;

[0079] S04. The controller 10 controls the anchor cable gripper 4-2 on the second lifting rod 4-1 in the maximum retracted state to grip the anchor cable 7 tightly; control the anchor cable gripper 4-2 on the second lifting rod 4-1 in the maximum extended state to open to the maximum angle. Let the first state be that the second lifting rod 4-1 is in the maximum extended state and the anchor cable gripper 4-2 is opened to the maximum angle, and the second state be that the second lifting rod 4-1 is in the maximum retracted state and the anchor cable gripper 4-2 has the minimum clamping angle;

[0080] S05. The controller 10 controls the second lifting rod 4-1 in the second state to extend until the corresponding position feedback sensor 8 detects that the extended length of the second lifting rod 4-1 reaches the maximum value, controls the second lifting rod 4-1 in the first state to contract until the corresponding position feedback sensor 8 detects that the extended length of the second lifting rod 4-1 reaches the minimum value, swap the states of the two second lifting rods 4-1, and jump to step S05 until the cable anchor is sent to the designated position or an external termination command is received;

[0081] Among them, the method for judging the state of the second lifting rod 4-1 is as follows: if the position feedback sensor 8 corresponding to the second lifting rod 4-1 detects that the elongation length of the second lifting rod 4-1 is at the maximum value, and the state of the corresponding touch switch 4-2-9 is off, then the state of the second lifting rod 4-1 is the first state; if the position feedback sensor 8 corresponding to the second lifting rod 4-1 detects that the elongation length of the second lifting rod 4-1 is at the minimum value, and the state of the corresponding touch switch 4-2-9 is on, then the state of the second lifting rod 4-1 is the second state.

[0082] Here, the elongation state of the two second lifting rods 4-1 can be detected by the position feedback sensor 8, and the state of the cable anchor gripper 4-2 gripping the cable anchor 7 can be detected by the touch switch 4-2-9. The first state is set as the second lifting rod 4-1 being in the maximum elongation state and the cable anchor gripper 4-2 having the maximum opening angle, and the second state is set as the second lifting rod 4-1 being in the maximum contraction state and the cable anchor gripper 4-2 having the minimum clamping angle. By switching the two pairs of second lifting rods 4-1 and cable anchor grippers 4-2 between the first state and the second state, the process of feeding the cable anchor 7 into the drill hole is not interrupted, and the efficiency is ensured.

[0083] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A super prestressed support device, characterized in that, the device includes a bottom plate (1), a tray clamp (2-1), an anchor feeding mechanism (4) and a tensioning mechanism (5); a through hole (1-1) penetrating the upper and lower surfaces of the bottom plate (1) is formed on the bottom plate (1), the diameter of the through hole (1-1) is larger than the diameter of the anchor cable (7), a first lifting rod (2-2) is fixedly connected to the upper part of the bottom plate (1), the telescopic direction of the first lifting rod (2-2) is parallel to the central axis of the through hole (1-1), and the upper end of the first lifting rod (2-2) is fixedly connected to the tray clamp (2-1); the tray clamp (2-1) matches the shape of the lower surface of the tray (3), and the central axis of the tray clamp (2-1) coincides with the central axis of the through hole (1-1); an anchor feeding mechanism (4) is further provided on the upper part of the bottom plate (1), the anchor feeding mechanism (4) matches the anchor cable (7), and the central axis of the anchor feeding mechanism (4) coincides with the central axis of the through hole (1-1); a tensioning mechanism (5) is fixedly connected to the lower part of the bottom plate (1), the tensioning mechanism (5) matches the anchor cable (7), and the central axis of the tensioning mechanism (5) coincides with the central axis of the through hole (1-1); the anchor feeding mechanism (4) includes a controller (10), a position feedback sensor (8), a second lifting rod (4-1) and an anchor cable gripper (4-2); there are two second lifting rods (4-1), the two second lifting rods (4-1) are arranged on both sides of the through hole (1-1), the upper ends of the two second lifting rods (4-1) are respectively connected with the anchor cable gripper (4-2), the telescopic direction of the second lifting rod (4-1) is parallel to the central axis of the through hole (1-1), and the second lifting rod (4-1) is electrically connected to the controller (10); the position feedback sensor (8) is arranged on the second lifting rod (4-1), and the position feedback sensor (8) is electrically connected to the controller (10); the tensioning mechanism (5) includes a third lifting rod (5-2) and a fastening disc; there are two third lifting rods (5-2), one end of the third lifting rod (5-2) is fixedly connected to the lower surface of the bottom plate (1), the two third lifting rods (5-2) are located on both sides of the through hole (1-1), the third lifting rod (5-2) is parallel to the central axis of the through hole (1-1), and the lower end of the third lifting rod (5-2) is fixedly connected to the fastening disc; the central axis of the fastening disc is perpendicular to the central axis of the through hole (1-1); the fastening disc includes a disc body (5-1) and a clamping block (5-3); the diameter of the disc body (5-1) is larger than the distance between the two third lifting rods (5-2), a through hole (5-1-2) penetrating the upper and lower surfaces of the disc body (5-1) is formed at the center of the disc body (5-1), the diameter of the through hole (5-1-2) is larger than the diameter of the anchor cable (7), a chute (5-1-1) penetrating the upper and lower surfaces of the disc body (5-1) is arranged on the side wall of the through hole (5-1-2), the two side walls of the chute (5-1-1) at the through hole (5-1-2) are parallel to the central axis of the through hole (5-1-2), the side wall of the chute (5-1-1) opposite to the through hole (5-1-2) is an inclined surface, and the distance from the upper edge of the inclined surface to the center of the disc body (5-1) is less than the distance from the lower edge of the inclined surface to the center of the disc body (5-1); The clamping block (5-3) is trapezoidal. The thickness of the clamping block (5-3) matches the distance between the two side walls of the sliding groove (5-1-1). One waist of the clamping block (5-3) is perpendicular to the bottom surface of the clamping block (5-3), and the included angle between the other waist of the clamping block (5-3) and the bottom surface of the clamping block (5-3) is the same as the included angle between the inclined plane and the bottom surface of the disc body (5-1). The height of the clamping block (5-3) is greater than the height of the disc body (5-1). An arc surface matching the cable anchor (7) is provided on the waist of the clamping block (5-3) perpendicular to the bottom surface.

2. The super prestressed support device according to claim 1, characterized in that the tray fixture (2-1) is annular, and the inner diameter of the tray fixture (2-1) matches the protruding part on the lower surface of the tray (3).

3. The super prestressed support device according to claim 2, characterized in that a rubber pad is provided on the upper surface of the tray fixture (2-1); a fourth lifting rod (6-1) is provided on the lower surface of the bottom plate (1). There are 4 fourth lifting rods (6-1), and the 4 fourth lifting rods (6-1) are distributed at the four corners of the bottom plate (1). The lower end of the fourth lifting rod (6-1) is fixedly connected to the support disc (6-2), and the lower surface of the support disc (6-2) is perpendicular to the length direction of the fourth lifting rod (6-1).

4. The super prestressed support device according to claim 1, characterized in that the cable anchor gripper (4-2) includes a touch switch (4-2-9), a support arm (4-2-13), a shrapnel (4-2-10), a first movable rod (4-2-3), a second movable rod (4-2-4), a first clamping block (4-2-5), a second clamping block (4-2-6), a stepping motor (4-2-11), a lead screw (4-2-12), a slider (4-2-2) and a control arm (4-2-8); one end of the support arm (4-2-13) is fixedly connected to the upper end of the second lifting rod (4-1). The support arm (4-2-13) is perpendicular to the second lifting rod (4-1). A clamping rotating shaft (4-7) is provided on the upper surface of the support arm (4-2-13) far from the second lifting rod (4-1), and the rotating shaft is parallel to the second lifting rod (4-1); the first movable rod (4-2-3) and the second movable rod (4-2-4) are rotatably connected to the clamping rotating shaft (4-7); the first clamping block (4-2-5) is fixedly connected to one end of the first movable rod (4-2-3) far from the second lifting rod (4-1), and the second clamping block (4-2-6) is fixedly connected to one end of the second movable rod (4-2-4) far from the second lifting rod (4-1). A semi-circular arc is provided on the first clamping block (4-2-5), and the opening of the semi-circular arc faces the second clamping block (4-2-6). The central axis of the semi-circular arc is parallel to the central axis of the through hole (1-1). The second clamping block (4-2-6) is symmetrical to the first clamping block (4-2-5) left and right. When the first clamping block (4-2-5) and the second clamping block (4-2-6) are in contact with each other, the semi-circular arcs on the first clamping block (4-2-5) and the second clamping block (4-2-6) enclose a cylindrical hole, and the central axis of the cylindrical hole coincides with the central axis of the through hole (1-1); The elastic piece (4-2-10) is arranged between the first movable rod (4-2-3) and the second movable rod (4-2-4), and the elastic force direction of the elastic piece (4-2-10) is consistent with the opening direction of the first movable rod (4-2-3) and the second movable rod (4-2-4); The stepping motor (4-2-11) is fixedly connected to the support arm (4-2-13). The rotating shaft of the stepping motor (4-2-11) is parallel to the length direction of the support arm (4-2-13). A lead screw (4-2-12) is fixedly connected to the rotating shaft of the stepping motor (4-2-11). The central axis of the lead screw (4-2-12) coincides with the central axis of the rotating shaft of the stepping motor (4-2-11). The stepping motor (4-2-11) is electrically connected to the controller (10); The slider (4-2-2) is slidably connected to the support arm (4-2-13). A first threaded hole (4-2-1) is opened on the slider (4-2-2). The first threaded hole (4-2-1) penetrates through the slider (4-2-2) in the length direction of the support arm (4-2-13). The first threaded hole (4-2-1) matches the lead screw (4-2-12), and the lead screw (4-2-12) is threadedly connected to the first threaded hole (4-2-1); There are 2 control arms (4-2-8). The two control arms (4-2-8) are symmetrically distributed with the support arm (4-2-13) as the central axis. The control arm (4-2-8) includes a first branch rod (4-2-8-1) and a second branch rod (4-2-8-2). The first branch rod (4-2-8-1) and the second branch rod (4-2-8-2) are connected to form an L shape. The first branch rod (4-2-8-1) is fixedly connected to the slider (4-2-2). The second branch rod (4-2-8-2) contacts the outer side surface of the first movable rod (4-2-3) or the second movable rod (4-2-4). The second branch rod (4-2-8-2) of the control arm (4-2-8) is located on the side of the clamping rotating shaft (4-7) close to the second lifting rod (4-1); The touch switch (4-2-9) is fixedly connected to the support arm (4-2-13). When the control arm (4-2-8) drives the first clamping block (4-2-5) to contact the second clamping block (4-2-6), the slider (4-2-2) is located at point A on the support arm (4-2-13). The position of the touch switch (4-2-9) is at point A on the support arm (4-2-13). The touch switch (4-2-9) is normally closed, and the touch switch (4-2-9) is electrically connected to the controller (10).

5. The super prestressed support device according to claim 4, characterized in that, the second branch rod (4-2-8-2) is perpendicular to the first movable rod (4-2-3) and the second movable rod (4-2-4).

6. The super prestressed support device according to claim 5, characterized in that, rollers with central axes coinciding with the central axis of the second branch rod (4-2-8-2) are provided on the second branch rod (4-2-8-2).

7. A support method for the super prestressed support device according to claim 1, characterized in that, the method includes the following steps: S01. Set the initial positions of the two second lifting rods (4-1) such that one is in the maximum extended state and the other is in the maximum retracted state; S02. Pass the cable anchor (7) through the through-hole (1-1), and then through the central axes of the 2 cable anchor grippers (4-2); S03. Manually feed the cable anchor (7) into the drill hole until it can no longer be advanced; S04. The controller (10) controls the cable anchor gripper (4-2) on the second lifting rod (4-1) in the maximum retracted state to grip the cable anchor (7); controls the cable anchor gripper (4-2) on the second lifting rod (4-1) in the maximum extended state to open to the maximum angle. Let the first state be that the second lifting rod (4-1) is in the maximum extended state and the cable anchor gripper (4-2) is open to the maximum angle, and the second state be that the second lifting rod (4-1) is in the maximum retracted state and the clamping angle of the cable anchor gripper (4-2) is the minimum; S05. The controller (10) controls the second lifting rod (4-1) in the second state to extend until the corresponding position feedback sensor (8) detects that the extended length of the second lifting rod (4-1) is at the maximum value, controls the second lifting rod (4-1) in the first state to retract until the corresponding position feedback sensor (8) detects that the extended length of the second lifting rod (4-1) is at the minimum value, swap the states of the two second lifting rods (4-1), and jump to step S05 until the cable anchor is sent to the specified position or an external termination command is received; Among them, the method for judging the state of the second lifting rod (4-1) is that if the corresponding position feedback sensor (8) of the second lifting rod (4-1) detects that the extended length of the second lifting rod (4-1) is at the maximum value and the state of the corresponding touch switch (4-2-9) is off, then the state of the second lifting rod (4-1) is the first state; if the corresponding position feedback sensor (8) of the second lifting rod (4-1) detects that the extended length of the second lifting rod (4-1) is at the minimum value and the state of the corresponding touch switch (4-2-9) is on, then the state of the second lifting rod (4-1) is the second state.

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