Wiring device for top cutting and pressure relief of fully-mechanized mining surface take-up wire

Abstract

The invention relates to the technical field of mine roof-cutting pressure relief, in particular to a wiring device for roof-cutting pressure relief of a fully-mechanized coal mining face take-up wire. Comprising a base, a cord roll mounting shaft arranged on the base, a metering mechanism used for metering a detonating cord on the cord roll mounting shaft, a protection mechanism used for protecting the detonating cord and an anti-winding piece used for preventing the detonating cord from being wound when the detonating cord is released, and the metering mechanism comprises a counting wheel and a photoelectric sensor which are rotationally connected with the base; the protection mechanism comprises a flexible thin film pipe arranged on the base, when the detonating cord is released by pulling of the anti-winding piece, the detonating cord penetrates through the flexible thin film pipe, the detonating cord is sleeved with the flexible thin film pipe, and the anti-winding piece comprises a plurality of traction wheels which are evenly distributed in an annular mode. And when the detonating cord is released, the plurality of traction wheels surround to clamp the detonating cord and can rotate along with the detonating cord. According to the scheme, the arrangement length of the detonating cord can be accurately measured, and the phenomena of winding, abrasion and the like of the detonating cord can be prevented.

Description

Technical Field

[0001] This invention relates to the field of mine roof cutting and pressure relief technology, specifically to a wiring device for roof cutting and pressure relief in a fully mechanized mining face. Background Technology

[0002] In the technology of roof cutting and pressure relief for roadway protection in fully mechanized coal mining faces, deep-hole blasting is one of the widely used core methods. It is especially suitable for stress control and roadway protection under hard roof conditions. Deep-hole blasting involves drilling holes in the roof near the working line and blasting explosives to artificially create through cracks, cutting off the cantilever beam structure between the goaf and the roof above the working face. This blocks the transmission path of the advance support pressure, reduces the stress impact on adjacent roadways, and promotes the timely collapse of the roof along the pre-cracked surface to form a gangue support zone, thus protecting the stability of the roadway. The detonating cord used in deep-hole blasting in coal mines has excellent detonation transmission capabilities and is an important blasting material required for deep-hole blasting. However, due to the complex actual operating environment underground, the detonating cord often gets worn out, leading to moisture or breakage, which in turn causes it to lose its detonation transmission effect and result in deep-hole misfires. Furthermore, the detonating cord needs to be manually routed during use to prevent it from getting tangled or twisted, affecting the efficiency of the blasting process. When using an installation tube to send the explosive charge and detonating cord into the blast hole, it is impossible to accurately measure the release length of the detonating cord, making it difficult for on-site technicians to understand the usage of the detonating cord and adjust the amount of detonating cord used in subsequent blast holes. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a wiring device for cutting the top and relieving pressure in a fully mechanized mining face, which solves the problems mentioned in the background art where the detonating cord is easily worn out, twisted and tangled, and the length of the detonating cord cannot be accurately measured when using manual wiring in the process of cutting the top and relieving pressure in a mine.

[0004] To solve the above-mentioned technical problems, a basic solution adopted by the present invention is a wiring device for top cutting and pressure relief of a fully mechanized mining face, comprising a base, a cable reel mounting shaft disposed on the base, a measuring mechanism for measuring the detonating cord on the cable reel mounting shaft, a protective mechanism for protecting the detonating cord, and an anti-winding component for preventing the detonating cord from tangling when releasing the detonating cord. The measuring mechanism includes a counting wheel rotatably connected to the base and a photoelectric sensor for detecting the number of rotations of the counting wheel. The protective mechanism includes a flexible thin film tube disposed on the base. When the detonating cord is released by pulling through the anti-winding component, the detonating cord passes through the flexible thin film tube and the flexible thin film tube is sleeved over the detonating cord. The anti-winding component includes multiple annularly distributed traction wheels. When the detonating cord is released, the multiple traction wheels surround and clamp the detonating cord and rotate with the detonating cord.

[0005] Furthermore, a longitudinal guide post is vertically arranged on the base, a longitudinal slide is slidably arranged on the longitudinal guide post, a locking element is provided on the longitudinal slide to lock the longitudinal slide to the longitudinal guide post, a rotating shaft is horizontally arranged on the longitudinal slide parallel to the cable roll mounting shaft, the rotating shaft is fixedly connected to the longitudinal slide, the counting wheel is rotatably arranged on the rotating shaft, and the photoelectric sensor is arranged at the end of the rotating shaft away from the longitudinal guide post.

[0006] Furthermore, a limiting frame is provided on the rotating shaft to prevent the detonating cord from detaching from the counting wheel.

[0007] Furthermore, the counting wheel is provided with a placement groove that cooperates with the detonating cord, and the opening of the placement groove is V-shaped and inclined to both sides.

[0008] Furthermore, the surface of the placement groove is provided with a rubber layer to prevent the detonating cord from sliding relative to the counting wheel.

[0009] Furthermore, the protective mechanism also includes a mounting plate fixedly connected to the longitudinal slide and a mounting tube disposed on the mounting plate. The mounting plate is provided with a through hole for the detonating cord on the cable reel mounting shaft to pass through. The mounting tube is coaxially disposed with the through hole, and the flexible film tube is sleeved and folded and stacked outside the mounting tube.

[0010] Furthermore, the anti-winding component also includes a traction cylinder closed at both ends, with multiple traction wheels rotatably disposed inside the traction cylinder. Each end of the traction cylinder has a passage hole along its axis on its bottom wall, allowing the detonating cord to pass through. The traction cylinder is formed by two symmetrically arranged semi-cylinders joined together, with one side of each semi-cylinder hinged to the other side and the other side detachably connected. Each traction wheel includes a second rotating shaft rotatably connected at both ends to the bottom walls of the corresponding semi-cylinders, and an elastic friction wheel sleeved outside the second rotating shaft. The axis of the second rotating shaft is parallel to the axis of the traction cylinder. At least two second rotating shafts are provided on each semi-cylinder, and the axes of multiple second rotating shafts are evenly distributed in a ring around a circumference coaxial with the passage hole.

[0011] Furthermore, the elastic friction wheel is made of elastic rubber and is fixedly connected to the second rotating shaft.

[0012] Furthermore, the base is provided with a transverse slide rail parallel to the first rotating shaft, a transverse slide block is slidably connected to the slide rail, and a second locking member is provided on the transverse slide block to lock the transverse slide block to the transverse slide rail. The lower end of the longitudinal guide post is fixedly connected to the transverse slide block.

[0013] Furthermore, the base is provided with a display screen for displaying the length of the detonating cord, and the display screen is electrically connected to the photoelectric sensor.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This solution uses a photoelectric sensor in conjunction with a counting wheel to accurately measure the length of the detonating cord by detecting the number of rotations of the counting wheel.

[0015] 2. In this case, when the detonating cord is released, the second locking piece is loosened, and the longitudinal guide post can slide on the slide rail with the transverse slide block to change the position of the counting wheel in the horizontal direction to cooperate with the release of the detonating cord on the cord reel mounting shaft, thereby reducing the angle between the detonating cord and the center plane of the V-shaped counting wheel in the horizontal direction, and thus reducing the resistance and torque when the detonating cord is released.

[0016] 3. This scheme uses a traction cylinder to pull the detonating cord for detonation. During the detonation process, the elastic friction wheels holding the detonating cord can be passively rotated to release the internal torsional stress caused by various reasons, thus preventing the detonating cord from becoming entangled due to the torsional stress not being released during detonation.

[0017] 4. In this solution, a flexible membrane tube is installed. The flexible membrane tube is automatically and synchronously sleeved on the outside of the detonating cord when it is released, which prevents the detonating cord from directly contacting the ground when it is pulled, thus preventing it from getting damp and abraded. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of the application and are used to explain the application, but do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a three-dimensional schematic diagram of a wiring device for top cutting and pressure relief in a fully mechanized mining face according to the present invention.

[0019] Figure 2 A structural schematic diagram of the components in the main view direction.

[0020] Figure 3 This is a schematic diagram of the protective mechanism in the left-side view.

[0021] Figure 4 This is a schematic diagram of the structure of the traction cylinder from the front view.

[0022] Figure 5 This is a schematic diagram of the structure when the traction cylinder is open.

[0023] Figure 6 for Figure 4 Sectional view of AA.

[0024] The meanings of the labels in the attached diagram are as follows: Base-10; Detonating cord roll-20; Counting wheel-30; Placement slot-301; Limiting frame-31; Photoelectric sensor-32; Flexible film tube-40; mounting plate-41; perforation-410; mounting tube-42; Longitudinal guide post-50; Longitudinal slide block-51; Locking element-52; Rotary shaft-53; Traction cylinder-60; passage hole-61; semi-cylinder-62; lug-621; rotating shaft two-63; elastic friction wheel-64; rotating shaft three-65; Horizontal slide rail - 70; Horizontal slide block - 71; Locking element 2 - 72; Display screen -80. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0027] This embodiment provides a wiring device for top cutting and pressure relief in a fully mechanized mining face, such as... Figures 1-6 As shown, the system includes a base 10 with a frame structure, a cable reel mounting shaft mounted on the base 10, a measuring mechanism for measuring the detonating cord on the cable reel mounting shaft, a protective mechanism for protecting the detonating cord, and an anti-winding component to prevent the detonating cord from tangling when it is released. The cable reel mounting shaft is used to mount the detonating cord reel 20. The cable reel mounting shaft is horizontally positioned, with one end fixedly connected to the base 10 and the other end threaded with a retaining ring to prevent the detonating cord reel 20 from detaching from the cable reel mounting shaft. After unscrewing the retaining ring, the detonating cord reel 20 is mounted on the cable reel mounting shaft, and then the retaining ring is tightened. When the detonating cord is released, the detonating cord reel 20 rotates relative to the cable reel mounting shaft.

[0028] The measuring mechanism includes a counting wheel 30 rotatably connected to the base 10 and a photoelectric sensor 32 for detecting the number of rotations of the counting wheel 30. Figures 1-3As shown, a longitudinal guide post 50 is vertically arranged on the base 10, and a longitudinal slide block 51 is slidably arranged on the longitudinal guide post 50. A locking element 52 is provided on the longitudinal slide block 51 to lock it onto the longitudinal guide post 50. The longitudinal slide block 51 is a square body sleeved outside the longitudinal guide post 50. The locking element 52 is a locking screw; tightening the locking screw locks the longitudinal slide block 51 onto the longitudinal guide post 50. A transverse slide rail 70 parallel to the first rotating shaft 53 is provided on the base 10. The transverse slide block 71 is slidably connected to the slide rail. A second locking element 72 is provided on the transverse slide block 71 to lock it onto the transverse slide rail 70. The second locking element 72 is a locking screw; tightening the locking screw locks the transverse slide block 71 onto the transverse slide rail 70. The lower end of the longitudinal guide post 50 is fixedly connected to the transverse slide block 71. A rotating shaft 53, parallel to the cable winding mounting shaft, is horizontally arranged on the longitudinal slide 51. One end of the rotating shaft 53 is fixedly connected to the longitudinal slide 51. The counting wheel 30 is rotatably mounted on and connected to the rotating shaft 53. The counting wheel 30 has a placement groove 301 that mates with the detonating cord 201. The opening of the placement groove 301 is V-shaped and inclined to both sides. The surface of the placement groove 301 is provided with a rubber layer to prevent the detonating cord 201 from sliding relative to the counting wheel 30. A limiting frame 31 to prevent the detonating cord 201 from detaching from the counting wheel 30 is also fixedly connected to the rotating shaft 53. The photoelectric sensor 32 is disposed on the longitudinal slide 51. At the end of the rotating shaft 53 away from the longitudinal guide post 50, multiple reflective strips are evenly distributed circumferentially around the axis of the rotating shaft 53 on the side wall of the counting wheel 30 facing the photoelectric sensor 32. The photoelectric sensor 32 emits an induction laser towards the counting wheel 30. When the reflective strip on the counter rotates to a predetermined position, the photoelectric sensor 32 receives the induction laser reflected by the reflective strip. The photoelectric sensor 32 calculates the detonating cord's discharge length by receiving the number of reflected induction lasers and combining the diameter of the counting wheel 30 and the distribution number of reflective strips. The calculated data is then transmitted to the display screen 80 on the base 10, where the length of the detonating cord can be displayed intuitively.

[0029] Combination Figure 1 , Figure 3As shown, the protective mechanism includes a mounting plate 41 fixedly connected to the longitudinal slide 51, a mounting tube 42 disposed on the mounting plate 41, and a flexible film tube 40 disposed outside the mounting tube 42. The mounting plate 41 is disposed in front of the counting wheel 30. The mounting plate 41 is provided with a through hole 410 for the detonating cord on the cable reel mounting shaft to pass through. The mounting tube 42 is coaxially disposed with the through hole 410. The flexible film tube 40 is sleeved and folded and stacked outside the mounting tube 42. The inner diameters of the mounting tube 42 and the perforation 410 are both larger than the outer diameter of the detonating cord. The inner diameter of the flexible film tube 40 is larger than the outer diameter of the mounting tube 42. The two ends of the flexible film tube 40 can be temporarily attached to the outer wall of the mounting tube 42 with adhesive tape. When the detonating cord passes through the mounting tube 42, the adhesive tape at the end of the flexible film tube 40 away from the mounting plate 41 is torn off and attached to the detonating cord. When the detonating cord is pulled and continuously passes through the mounting tube 42, the flexible film tube 40 is released simultaneously and sleeved on the outside of the detonating cord to prevent the detonating cord from directly contacting hard objects such as the ground. In this embodiment, the flexible film tube 40 can be made of flexible fabric or TPU film.

[0030] Combination and Figures 4-6 As shown, the anti-winding component includes a circular, closed-end traction cylinder 60 and multiple traction wheels rotatably disposed within the traction cylinder 60. Each end of the traction cylinder 60 has a passage hole 61 along its axis on its bottom wall, allowing the detonating cord to pass through. The diameter of the passage hole 61 is larger than the outer diameter of the detonating cord. The traction cylinder 60 is formed by two symmetrically arranged semi-cylinders 62. One side of each semi-cylinder 62 is hinged to the other by a hinge seat and a rotating shaft 65. The other side of each semi-cylinder 62 has a lug 621 with bolt holes for connecting the two semi-cylinders 62. Each traction wheel includes a rotating shaft 63 rotatably connected to the bottom walls of the corresponding semi-cylinder 62 at both ends, and an elastic friction wheel 64 sleeved on the rotating shaft 63. The elastic friction wheel 64 is made of elastic rubber and covers the rotating shaft 63. The second rotating shaft 63 is fixedly connected. Specifically, the axis of the second rotating shaft 63 is parallel to the axis of the traction cylinder 60. In this example, two second rotating shafts 63 are provided on the semi-cylinder 62. In other feasible embodiments, other numbers of second rotating shafts 63 can be provided as needed. The axes of the four second rotating shafts 63 are evenly distributed in a ring on a circumference coaxial with the passage hole 61. Both ends of the second rotating shaft 63 are rotatably connected to the bottom wall of the semi-cylinder 62 through a bidirectional thrust bearing. When the detonating cord is released, multiple elastic friction wheels 64 surround and clamp the detonating cord and can rotate with the detonating cord.

[0031] In use, the detonating cord reel 20 is mounted on the reel mounting shaft. A flexible film tube 40 is fitted over the mounting tube 42, with both ends of the flexible film tube 40 temporarily attached to the outer wall of the mounting tube 42 using adhesive tape, causing the flexible film tube 40 to fold and stack outside the mounting tube 42. The detonating cord on the reel 20 is wound around the placement groove 301 on the counting wheel 30, then passes through the perforation 410 on the mounting plate 41 and extends out of the mounting tube 42. After the detonating cord passes through the mounting tube 42, the two semi-cylinders 62 are then separated to open the traction cylinder 60, allowing the detonating cord 201 to be placed inside. The two semi-cylinders 62 are joined together inside the passage hole 61 of the traction cylinder 60 and fixed together with bolts. At this time, each elastic friction wheel 64 clamps the detonating cord from all sides, so that the detonating cord cannot move along the axis of the detonating cord inside the traction cylinder 60. Then, the tape at the end of the flexible film tube 40 away from the mounting plate 41 is torn off and glued to the detonating cord. When the traction cylinder 60 is held and the detonating cord is pulled through the mounting tube 42, the flexible film tube 40 is released simultaneously and sleeved on the outside of the detonating cord to prevent the detonating cord from directly contacting the ground and getting wet and worn when the detonating cord is pulled.

[0032] When the detonating cord is pulled, the detonating cord reel 20 rotates relative to the reel mounting shaft to release the detonating cord. Driven by the detonating cord 201, the counting wheel 30 rotates relative to the rotating shaft 53. The photoelectric sensor 32 calculates the release length of the detonating cord by checking the number of rotations of the counting wheel 30, and then displays the release length of the detonating cord on the display screen 80.

[0033] When the traction cylinder 60 pulls the detonating cord 201 to lay the detonating cord, the elastic friction wheels 64 holding the detonating cord can be passively rotated to release the internal torsional stress of the detonating cord caused by various reasons, and prevent the detonating cord from bending, deforming and tangling because the torsional stress of the detonating cord 201 is not released during the laying process.

[0034] The height of the counting wheel 30 can be adjusted by loosening or rotating the locking element 52, and the lateral position of the counting wheel 30 can be adjusted by loosening or rotating the locking element 72. When the locking element 72 is loosened to pull the detonating cord for cable laying, the longitudinal guide post 50 can slide on the slide rail with the transverse slide block 71 to change the horizontal position of the counting wheel 30 to cooperate with the release of the detonating cord on the cable reel mounting shaft, reduce the horizontal angle between the detonating cord and the center plane of the V-shaped counting wheel 30, and thus reduce the resistance and torque when the detonating cord is released.

[0035] The above are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics in the solutions is not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A wiring device for top cutting and pressure relief of a fully mechanized mining face, comprising a base (10) and a cable roll mounting shaft disposed on the base (10), characterized in that: It also includes a metering mechanism for measuring the detonating cord on the cable reel mounting shaft, a protective mechanism for protecting the detonating cord, and an anti-winding component for preventing the detonating cord from tangling when the detonating cord is released. The metering mechanism includes a counting wheel (30) rotatably connected to the base (10) and a photoelectric sensor (32) for detecting the number of rotations of the counting wheel (30). The protective mechanism includes a flexible film tube (40) disposed on the base (10). When the detonating cord is released by pulling through the anti-winding component, the detonating cord passes through the flexible film tube (40) and the flexible film tube (40) is sleeved over the detonating cord. The anti-winding component includes a plurality of annularly distributed traction wheels. When the detonating cord is released, the plurality of traction wheels surround and clamp the detonating cord and rotate with the detonating cord.

2. The wiring device for top cutting and pressure relief in fully mechanized mining face according to claim 1, characterized in that: A longitudinal guide post (50) is vertically arranged on the base (10). A longitudinal slide block (51) is slidably arranged on the longitudinal guide post (50). A locking member (52) is provided on the longitudinal slide block (51) to lock the longitudinal slide block (51) to the longitudinal guide post (50). A rotating shaft (53) parallel to the cable roll mounting shaft is horizontally arranged on the longitudinal slide block (51). The rotating shaft (53) is fixedly connected to the longitudinal slide block (51). The counting wheel (30) is rotatably arranged on the rotating shaft (53). The photoelectric sensor (32) is arranged at the end of the rotating shaft (53) away from the longitudinal guide post (50).

3. The wiring device for top cutting and pressure relief in the fully mechanized mining face according to claim 2, characterized in that: The rotating shaft (53) is provided with a limiting frame (31) to prevent the detonating cord from detaching from the counting wheel (30).

4. The wiring device for top cutting and pressure relief in a fully mechanized mining face as described in claim 2, characterized in that: The counting wheel (30) is provided with a placement groove (301) that cooperates with the detonating cord, and the opening of the placement groove (301) is V-shaped and inclined to both sides.

5. The wiring device for top cutting and pressure relief in the fully mechanized mining face according to claim 4, characterized in that: The surface of the placement groove (301) is provided with a rubber layer to prevent the detonating cord from sliding relative to the counting wheel (30).

6. The wiring device for top cutting and pressure relief in a fully mechanized mining face as described in claim 2, characterized in that: The protective mechanism also includes a mounting plate (41) fixedly connected to the longitudinal slide (51) and a mounting tube (42) disposed on the mounting plate (41). The mounting plate (41) is provided with a perforation (410) for the detonating cord on the cable roll mounting shaft to pass through. The mounting tube (42) is coaxially disposed with the perforation (410). The flexible film tube (40) is sleeved and folded and stacked outside the mounting tube (42).

7. The wiring device for top cutting and pressure relief in a fully mechanized mining face as described in claim 1, characterized in that: The anti-winding component also includes a traction cylinder (60) closed at both ends. Multiple traction wheels are rotatably disposed inside the traction cylinder (60). Passage holes (61) for the passage of detonating cord are provided on the bottom walls at both ends of the traction cylinder (60) along the axis of the traction cylinder (60). The traction cylinder (60) is formed by two symmetrically arranged semi-cylinders (62). One side of the two semi-cylinders (62) is hinged to each other, while the other side is detachably connected. The traction wheel includes a rotating shaft (63) at both ends rotatably connected to the bottom walls at both ends of the corresponding semi-cylinders (62) and an elastic friction wheel (64) sleeved on the rotating shaft (63). The axis of the rotating shaft (63) is parallel to the axis of the traction cylinder (60). At least two rotating shafts (63) are provided on the semi-cylinder (62). The axes of multiple rotating shafts (63) are evenly distributed in a ring on a circumference coaxial with the passage hole (61).

8. The wiring device for top cutting and pressure relief in a fully mechanized mining face as described in claim 7, characterized in that: The elastic friction wheel (64) is made of elastic rubber and is fixedly connected to the rotating shaft (63).

9. The wiring device for top cutting and pressure relief in a fully mechanized mining face as described in claim 2, characterized in that: The base (10) is provided with a transverse slide rail (70) parallel to the first rotating shaft (53), and a transverse slide block (71) is slidably connected on the slide rail. The transverse slide block (71) is provided with a locking member (72) that locks the transverse slide block (71) to the transverse slide rail (70). The lower end of the longitudinal guide post (50) is fixedly connected to the transverse slide block (71).

10. The wiring device for top cutting and pressure relief of the fully mechanized mining face as described in claim 1, characterized in that: The base (10) is provided with a display screen (80) for displaying the length of the detonating cord, and the display screen (80) is electrically connected to the photoelectric sensor (32).

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