Roof cutting and pressure relief device for coal mine

Abstract

The utility model relates to the technical field of coal mine machinery, in particular to a roof-cutting pressure relief device for a coal mine, which comprises a machine body and a traveling mechanism arranged below the machine body, a drill arm unit is arranged above the machine body, a propelling mechanism is fixed at the free end of the drill arm unit, and the propelling mechanism is used for propelling a drill rod to move; the supporting mechanism is used for jacking up the whole machine body and keeping balance in the drilling operation, so that the working position stability of the drill rod is guaranteed, the hole site forming quality is improved, meanwhile, due to the balance assembly, the supporting stability of the machine body can be guaranteed in the complex environment of a coal mine, and the drilling efficiency is improved. Compared with a traditional hydraulic cylinder telescopic supporting mode, the structure can effectively solve the problems that a machine body shakes and the punching precision is affected due to the fact that a single supporting leg is suspended, the overall structural design is simple and reasonable, and the adaptability of drilling operation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine machinery, in particular to a top cutting pressure relief device for coal mines. Background Art

[0002] Coal mine top cutting drilling vehicle is a new generation of crawler walking tunnel top cutting drilling equipment, mainly used for underground coal mine top cutting pressure relief automatic tunneling technology cutting blasting hole construction and other engineering holes, suitable for various coal seams and rock strata with rock strength coefficient f10.

[0003] At present, the conventional top cutting drill vehicle structure generally includes a frame, a drill arm and a drill rod thruster. For example, a fully hydraulic top cutting pressure relief drill vehicle disclosed in Chinese patent publication number "CN107829749A" includes a lower frame and an upper frame arranged on the lower frame, a drill arm seat and a drill arm connected to the drill arm seat are arranged on the upper frame, a drill arm is arranged on the drill arm, and a drill rod thruster is arranged, and also includes a slitting drill rod driven by the drill rod thruster, and the slitting drill rod is provided with slitting blades with a V-shaped cross section on both radial sides.

[0004] However, in actual work, due to the complex ground environment of coal mines, it is difficult for traditional crawler frames to obtain good support balance. If shaking occurs during drilling operations, it will easily affect the drilling quality. Currently, some drilling equipment is also equipped with hydraulic cylinder telescopic legs, but when the ground is uneven, it is easy for one of the four telescopic legs to be suspended in the air, so it is still difficult to ensure the stability of the operation. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art, such as the difficulty in obtaining a good support balance for the traditional crawler frame due to the complex ground environment of the coal mine, and the difficulty in affecting the drilling quality if shaking occurs during the drilling operation, and a top cutting and pressure relief device for coal mines is proposed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A top cutting and pressure relief device for coal mines is designed, comprising a machine body and a walking mechanism arranged below the machine body, a drill arm unit is installed above the machine body, a propulsion mechanism is fixed at the free end of the drill arm unit, and the propulsion mechanism is used to propel the drill rod to move;

[0008] Wherein, support mechanisms are also provided on both sides of the machine body;

[0009] The supporting mechanism comprises a moving component and a balancing component arranged on the moving component, the balancing component is used to contact the ground, and the balancing component is detachably connected to the moving component.

[0010] Furthermore, the moving component includes a dual-axis motor fixed inside the body, and two U-shaped rods are movably inserted inside the body, both ends of the U-shaped rods pass through the body, wherein both ends of the dual-axis motor are also fixed with screws threadedly connected to the U-shaped rods.

[0011] Furthermore, the balancing assembly includes a support frame, a hydraulic cylinder is fixed on the support frame, a wheel frame is fixed on the shaft end of the hydraulic cylinder, and a gear is rotatably connected in the wheel frame;

[0012] Two support arms are also slidably connected below the support frame, and racks meshing with the gears are arranged on the sides of the support arms.

[0013] Furthermore, a plurality of guide rods are fixedly mounted on the bottom of the support frame, wherein at least two guide rods form a group and are plugged into the support arm, and a spring is fixed between the guide rod and the support arm.

[0014] Furthermore, a positioning glass bead is embedded on the outside of the U-shaped rod, and a positioning hole matched with the positioning glass bead is opened on the outside of the support frame.

[0015] Furthermore, two auxiliary columns are fixed on the side of the body, and the two auxiliary columns can be inserted into the holes at both ends of the support frame.

[0016] The utility model proposes a top cutting and pressure relief device for coal mines, which has the beneficial effect that the support mechanism provided in the utility model is used to lift and balance the entire machine body during the drilling operation, thereby ensuring the working position stability of the drill rod and providing hole forming quality. At the same time, due to the balance component provided in the utility model, the stability of the machine body support can be ensured in the complex environment of the coal mine. Compared with the traditional hydraulic cylinder telescopic support method, this structure can effectively avoid the problem of machine body shaking caused by a single support leg being suspended in the air, which affects the drilling accuracy. The overall structural design is simple and reasonable, which improves the adaptability of the drilling operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the dual-axis motor structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the balancing component of the utility model;

[0020] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of area A.

[0021] In the figure: 1. machine body; 11. auxiliary column; 2. walking mechanism; 3. drill arm unit; 4. propulsion mechanism; 5. drill rod; 6. support mechanism; 61. moving assembly; 611. dual-axis motor; 612. U-shaped rod; 613. screw; 614. positioning glass beads; 62. balancing assembly; 621. support frame; 622. hydraulic cylinder; 623. wheel frame; 624. gear; 625. support arm; 626. rack; 627. guide rod; 628. spring; 629. positioning hole. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Reference Figure 1-4 This is an embodiment of the utility model, which discloses a top cutting pressure relief device for coal mines. Specifically, the device includes a machine body 1 and a walking mechanism 2 arranged below the machine body 1. A drill arm unit 3 is installed above the machine body 1. A propulsion mechanism 4 is fixed to the free end of the drill arm unit 3. The propulsion mechanism 4 is used to propel the drill rod 5 to move. The walking mechanism 2, the drill arm unit 3 and the propulsion mechanism 4 described in this embodiment are not the focus of improvement. At the same time, technicians in the relevant field can obtain them from the existing technology without any technical obstacles, so they are not described in detail here.

[0024] Wherein, support mechanisms 6 are also provided on both sides of the machine body 1;

[0025] The supporting mechanism 6 includes a moving component 61 and a balancing component 62 disposed on the moving component 61 . The balancing component 62 is used to contact the ground, and the balancing component 62 is detachably connected to the moving component 61 .

[0026] That is to say, in the embodiment of the utility model, the supporting mechanism 6 is provided to lift up the entire machine body 1 and keep it balanced during the drilling operation, thereby ensuring the working position stability of the drill rod 5 and improving the hole forming quality.

[0027] In some embodiments, the moving component 61 in the utility model includes a dual-axis motor 611 fixed inside the body 1, and two U-shaped rods 612 are movably inserted inside the body 1, and both ends of the U-shaped rod 612 pass through the body 1, wherein both ends of the dual-axis motor 611 are also fixed with screws 613 threadedly connected to the U-shaped rod 612, that is, in this embodiment, the two U-shaped rods 612 are driven to move by the rotation of the dual-axis motor 611. When the two U-shaped rods 612 move, the balancing component 62 can be driven to move, so as to adaptively adjust the support position to meet the support requirements of the complex environment of the coal mine.

[0028] Furthermore, in this embodiment, the balancing assembly 62 includes a support frame 621, a hydraulic cylinder 622 is fixed above the support frame 621, a wheel frame 623 is fixed on the shaft end of the hydraulic cylinder 622, and a gear 624 is rotatably connected to the wheel frame 623;

[0029] Two support arms 625 are slidably connected below the support frame 621 , and racks 626 meshing with the gears 624 are disposed on the sides of the support arms 625 .

[0030] During operation, the gear 624 is driven downward by the hydraulic cylinder 622 and rotates inside the wheel frame 623. In the initial position, since the support arms 625 on both sides are subjected to the same force, the gear 624 will not rotate when it moves downward because the forces on both sides are the same, until it contacts the ground and props up the machine body 1. When the ground is uneven, the support arm 625 on one side contacts the ground first, and the support arm 625 on the other side is suspended in the air. When the gear 624 continues to move downward, due to the different forces on both sides, the gear 624 rotates until the support arm 625 on the other side also contacts the ground and reaches a balance point where the forces on both sides are the same. Then, the gear 624 continues to move downward to support the machine body 1. Such a design can ensure the stability of the support of the machine body 1 in the complex environment of a coal mine. Compared with the traditional hydraulic cylinder telescopic support method, this structure can effectively avoid the problem of the machine body 1 shaking due to a single leg being suspended in the air, thereby affecting the drilling accuracy.

[0031] On the basis of the above-mentioned embodiment, a plurality of guide rods 627 are fixedly installed at the bottom of the support frame 621 in the utility model, wherein at least two guide rods 627 form a group and are plugged into the support arm 625, and a spring 628 is fixed between the guide rod 627 and the support arm 625. The guide rod 627 is used to guide the support arm 625 to move, and the spring 628 is used to drive the support arm 625 to reset after work.

[0032] In addition, in this embodiment, a positioning glass bead 614 is embedded on the outside of the U-shaped rod 612, and a positioning hole 629 compatible with the positioning glass bead 614 is opened on the outside of the support frame 621. The structure of the positioning glass bead 614 is a prior art and will not be described in detail here. The support frame 621 can be disassembled and replaced by snapping the positioning glass bead 614 into the positioning hole 629, and the operation is simple.

[0033] Of course, considering that when the above-mentioned balancing component 62 is not needed, in order to facilitate its storage, two auxiliary columns 11 are fixed to the side of the body 1 in the embodiment of the utility model, and the two auxiliary columns 11 can be inserted into the holes at both ends of the support frame 621. That is to say, in this embodiment, when the balancing component 62 is not needed, the balancing component 62 can be removed from the U-shaped rod 612, and then the balancing component 62 can be hung on the two auxiliary columns 11. Of course, technical personnel in the relevant field know that positioning glass beads 614 can also be provided on the auxiliary columns 11 to fix them.

[0034] In summary, the support mechanism 6 provided in the utility model is used to lift and balance the entire machine body 1 during the drilling operation, thereby ensuring the working position stability of the drill rod 5 and providing hole forming quality. At the same time, due to the balance component 62 provided in the utility model, the stability of the support of the machine body 1 can be ensured in the complex environment of the coal mine. Compared with the traditional hydraulic cylinder telescopic support method, this structure can effectively avoid the problem of a single support leg being suspended in the air causing the machine body 1 to shake, thereby affecting the drilling accuracy.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A top cutting pressure relief device for coal mines, comprising a body (1) and a walking mechanism (2) arranged below the body (1), characterized in that: A drill arm unit (3) is installed above the machine body (1), a propulsion mechanism (4) is fixed to the free end of the drill arm unit (3), and the propulsion mechanism (4) is used to propel the drill rod (5) to move; Wherein, support mechanisms (6) are also provided on both sides of the machine body (1); The support mechanism (6) comprises a moving component (61) and a balancing component (62) arranged on the moving component (61); the balancing component (62) is used to contact the ground; and the balancing component (62) is detachably connected to the moving component (61).

2. A coal mine top cutting pressure relief device according to claim 1, characterized in that: The moving assembly (61) comprises a double-axis motor (611) fixed inside the machine body (1), and two U-shaped rods (612) are movably inserted inside the machine body (1), and both ends of the U-shaped rods (612) pass through the machine body (1), wherein screw rods (613) threadedly connected to the U-shaped rods (612) are fixed at both ends of the double-axis motor (611).

3. A top cutting pressure relief device for coal mines according to claim 2, characterized in that: The balancing assembly (62) comprises a support frame (621), a hydraulic cylinder (622) is fixed above the support frame (621), a wheel frame (623) is fixed on the shaft end of the hydraulic cylinder (622), and a gear (624) is rotatably connected to the wheel frame (623); Two support arms (625) are also slidably connected below the support frame (621), and racks (626) meshing with the gears (624) are provided on the sides of the support arms (625).

4. A coal mine top cutting pressure relief device according to claim 3, characterized in that: A plurality of guide rods (627) are fixedly mounted on the bottom of the support frame (621), wherein at least two guide rods (627) form a group and are plugged into the support arm (625), and a spring (628) is also fixed between the guide rods (627) and the support arm (625).

5. A coal mine top cutting pressure relief device according to claim 3, characterized in that: A positioning glass bead (614) is embedded on the outside of the U-shaped rod (612), and a positioning hole (629) adapted to the positioning glass bead (614) is opened on the outside of the support frame (621).

6. A top cutting pressure relief device for coal mines according to claim 5, characterized in that: Two auxiliary columns (11) are also fixed on the side of the machine body (1), and the two auxiliary columns (11) can be inserted into the holes at both ends of the support frame (621).

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