Drill rod stabilizer of raise boring machine

Abstract

The utility model discloses a drill rod stabilizer of a raise boring machine, which relates to the technical field of raise boring machines and comprises a stabilizing rod, a plurality of stabilizing rollers, a stabilizing support, an adjustable damping buffer device and a spring. The stabilizing rollers are symmetrically mounted on the side surface of the stabilizing bracket; the adjustable damping buffer device is arranged in the sliding part and is used for providing resistance when the stabilizing roller is close to the stabilizing bracket; the spring is arranged in the sliding part and used for driving the stabilizing roller to be away from the stabilizing support. The device can push the stabilizer bar to automatically return to the center of a drill hole.

Description

Technical Field

[0001] The utility model relates to the technical field of raise boring machines, in particular to a drill rod stabilizer of a raise boring machine. Background Art

[0002] The skylight is an important mine shaft and tunnel project, and its engineering volume accounts for about 40-50% of the mining and cutting engineering volume, while the blind skylight project accounts for about 10-20% of the skylight engineering volume. For a long time, the traditional blind skylight construction method has been mostly ordinary chiseling and blasting. This method has slow excavation speed, low efficiency, high wood consumption, poor ventilation, high labor intensity, poor working conditions, and many safety accidents. Therefore, blind skylight excavation has become one of the key issues that need to be urgently solved in mine production. Using a skylight drilling rig to drill the skylight can not only improve production efficiency, but also save a lot of wood and funds for the mine. It is a safe and reliable skylight construction method. Blind skylight drilling rigs usually adopt a drilling method of directly expanding the hole into a well from bottom to top. Therefore, the drill rod of the skylight drilling rig is usually suspended in the well, and the drill rod mainly bears thrust. For the relatively slender drill rod, it is easy to swing and bend and fail. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a drill rod stabilizer for a raise boring machine, which can push the stabilizer rod to automatically return to the center of the drill hole.

[0004] According to the first aspect of the utility model, a drill rod stabilizer of a skylight drilling rig includes: a stabilizing rod, a plurality of stabilizing rollers, a stabilizing bracket, an adjustable damping buffer device, and a spring. The stabilizing bracket is connected to the upper end of the stabilizing rod, the stabilizing roller is slidably connected to the stabilizing bracket through a sliding part, and a plurality of the stabilizing rollers are symmetrically installed on the side of the stabilizing bracket; the adjustable damping buffer device is arranged in the sliding part, and the adjustable damping buffer device is used to provide resistance when the stabilizing roller approaches the stabilizing bracket; the spring is arranged in the sliding part, and the spring is used to drive the stabilizing roller away from the stabilizing bracket.

[0005] A drill rod stabilizer for a well drilling rig according to an embodiment of the utility model has at least the following beneficial effects: if the drill rod deviates in the borehole, the drill rod will rotate eccentrically in the borehole. Since the stabilizing rod rotates with the drill rod, the stabilizing roller will continuously approach and move away from the stabilizing bracket while rolling along the hole wall. The adjustable damping buffer device provides resistance to the stabilizing roller when it approaches the stabilizing bracket, so that the stabilizing roller can push the stabilizing bracket to automatically return to the center of the borehole when it approaches the stabilizing bracket.

[0006] According to some embodiments of the present invention, the stabilizing roller is a universal wheel.

[0007] According to some embodiments of the utility model, the sliding part includes an inner cylinder and an outer cylinder, the inner cylinder is inserted into the outer cylinder and can move along the outer cylinder, the outer cylinder is connected to the stabilizing bracket, and the inner cylinder is connected to the stabilizing roller.

[0008] According to some embodiments of the utility model, a slide groove extending along the length direction of the outer cylinder is provided on the outer cylinder, and a positioning portion is connected to the outer wall of the inner cylinder. The positioning portion is embedded in the slide groove and can move along the slide groove.

[0009] According to some embodiments of the utility model, the adjustable damping buffer device includes a piston, an outer cylinder, and an inner cylinder. The piston is connected to a piston rod, and the piston rod is connected to the inner cylinder. The piston is slidably installed in a first chamber formed by the inner wall of the inner cylinder. A second chamber is formed between the inner cylinder and the outer cylinder, and the first chamber and the second chamber are connected through a throttle valve.

[0010] According to some embodiments of the present invention, the first chamber and the second chamber are connected via a one-way valve, and the one-way valve only allows the fluid in the second chamber to flow into the first chamber.

[0011] According to some embodiments of the utility model, the throttle valve is a manual valve, an operating hole is opened on the side wall of the outer cylinder to facilitate the operation of the throttle valve, and a cover plate capable of closing the operating hole is detachably connected to the side wall of the outer cylinder.

[0012] According to some embodiments of the present utility model, the throttle valve is an electric valve, and a controller and a battery for controlling the throttle valve are disposed in the outer cylinder.

[0013] According to some embodiments of the utility model, the spring is arranged in the inner cylinder, one end of the spring abuts against the outer cylinder, and the other end abuts against the inner wall of the inner cylinder.

[0014] According to some embodiments of the present invention, both ends of the stabilizing rod are provided with threads to facilitate installation on the drill rod.

[0015] A drill rod stabilizer for a raise boring machine according to an embodiment of the utility model has at least the following beneficial effects:

[0016] (1) The adjustable damping buffer device provides resistance when the stabilizing roller approaches the stabilizing bracket, so that the stabilizing roller can push the stabilizing bracket to automatically return to the center of the drilling hole when approaching the stabilizing bracket;

[0017] (2) The inner and outer cylinders are easy to install and disassemble, which is convenient for daily maintenance;

[0018] (3) By changing the thread size at the upper and lower ends of the stabilizer bar, it can be easily adapted to the existing skydrill rig.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 A schematic diagram of an installation structure of an embodiment of the utility model;

[0022] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0023] Figure 3 A schematic diagram of an outer cylinder and a stabilizing bracket of an embodiment of the utility model;

[0024] Figure 4 A cross-sectional schematic diagram of an embodiment of the utility model;

[0025] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0026] Figure 6 This is a schematic diagram of a stabilizing roller according to an embodiment of the utility model;

[0027] Figure 7 The utility model is a schematic diagram of an adjustable damping buffer device according to an embodiment of the present invention.

[0028] Figure Number:

[0029] Stabilizer bar 100;

[0030] Stabilizing roller 200;

[0031] Stabilizing bracket 300;

[0032] Sliding portion 400, inner cylinder 410, positioning portion 411, outer cylinder 420, slide groove 421, operating hole 422;

[0033] Adjustable damping buffer device 500, piston 510, piston rod 511, outer cylinder 520, inner cylinder 530, throttle valve 540;

[0034] Spring 600. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] Reference Figures 1 to 7As shown, a drill rod stabilizer for a skydrilling rig according to an embodiment of the utility model comprises: a stabilizing rod 100, a plurality of stabilizing rollers 200, a stabilizing bracket 300, an adjustable damping buffer device 500, and a spring 600. The stabilizing bracket 300 is connected to the upper end of the stabilizing rod 100, and the stabilizing bracket 300 can be integrally formed with the stabilizing rod 100. It is foreseeable that in order to reduce the manufacturing cost, the stabilizing bracket 300 is manufactured separately from the stabilizing rod 100 and connected by bolts. The stabilizing roller 200 is slidably connected to the stabilizing bracket 300 through a sliding part 400, and the material of the stabilizing roller 200 and the bracket for mounting the stabilizing roller 200 are both made of high-strength metal materials to better withstand the impact force. A plurality of stabilizing rollers 200 are symmetrically installed on the side of the stabilizing bracket 300, and the number of the stabilizing rollers 200 is selected to be four. It is foreseeable that there are at least three stabilizing rollers 200 to evenly support the stabilizing rod 100. When in use, the stabilizer rod 100 is connected between adjacent drill rods, and the distance between the two stabilizer rods 100 cannot exceed 5 meters. There are enough drill rod stabilizers to ensure that the drill rod will not deviate during the entire drilling process. When the drill rod is drilling, the stabilizer roller 200 abuts against the inner wall of the drilled hole and rotates with the drill rod. The adjustable damping buffer device 500 is arranged in the sliding part 400, and the adjustable damping buffer device 500 is used to provide resistance when the stabilizer roller 200 approaches the stabilizer bracket 300; if the drill rod deviates in the drilling hole, the drill rod will rotate eccentrically in the drilling hole. Since the stabilizer rod 100 rotates with the drill rod, the stabilizer roller 200 will continuously approach and move away from the stabilizer bracket 300 during the rolling process along the hole wall. The adjustable damping buffer device 500 provides resistance to the stabilizer roller 200 when it approaches the stabilizer bracket 300, so that the stabilizer roller 200 can push the stabilizer bracket 300 to automatically return to the center of the drilling hole during the process of approaching the stabilizer bracket 300. The spring 600 is arranged in the sliding part 400, and the spring 600 is used to drive the stabilizing roller 200 away from the stabilizing bracket 300. The function of the spring 600 is to push the stabilizing roller 200 to always be against the inner wall of the borehole, so that the stabilizing roller 200 can be reset after pushing the drill rod back to the center. The greater the degree of deviation of the drill rod, the greater the return thrust, and the faster the drill rod rotation speed, the greater the return thrust. The return thrust is equal to the force of the stabilizing roller 200 on the inner wall of the borehole, and the force that the stabilizing roller 200 can withstand and the extrusion force that the inner wall of the borehole can withstand are limited. Excessive return thrust will damage the stabilizing roller 200 or destroy the borehole. Therefore, by adjusting the damping size of the adjustable damping buffer device 500, the size of the return thrust generated when the stabilizing roller 200 approaches the stabilizing bracket 300 can be changed. The damping size of the adjustable damping buffer device 500 is adjusted according to the degree of drill rod deviation or the speed of the drill rod, so that the return thrust is maintained within a constant range to prevent the stabilizing roller 200 from exerting excessive pressure on the inner wall of the borehole.

[0040] Reference Figure 6As shown, it is understandable that the stabilizing roller 200 is a universal wheel. Since the drill rod not only rotates during operation, but also moves along the axial direction of the drill rod, the stabilizing roller 200 not only rotates with the drill rod, but also moves along the axial direction of the drill rod. Therefore, the movement trajectory of the stabilizing roller 200 is relatively complex, and it is more suitable to use a universal wheel. The specific structure and installation method of the stabilizing roller 200 are prior art, so they are not described in detail.

[0041] Reference Figures 1 to 6 As shown, it can be understood that the sliding part 400 includes an inner cylinder 410 and an outer cylinder 420, and both the inner cylinder 410 and the outer cylinder 420 are made of high-strength alloy steel. The outer diameter of the inner cylinder 410 is slightly smaller than the inner diameter of the outer cylinder 420, so that the inner cylinder 410 can just slide along the outer cylinder 420. The inner cylinder 410 is inserted into the outer cylinder 420 and can move along the outer cylinder 420. It can be foreseen that a rubber sealing ring is provided between the outer wall of the inner cylinder 410 and the inner wall of the outer cylinder 420, and the rubber sealing ring seals the gap between the outer wall of the inner cylinder 410 and the inner wall of the outer cylinder 420. The function of the rubber sealing ring is to prevent dust from entering the internal space of the outer cylinder 420 through the gap between the outer wall of the inner cylinder 410 and the inner wall of the outer cylinder 420. The outer cylinder 420 is welded to the stabilizing bracket 300, and the inner cylinder 410 is connected to the stabilizing roller 200. The outer cylinder 420 guides the inner cylinder 410 , and since there is a lot of dust in the drill hole, the combination of the outer cylinder 420 and the inner cylinder 410 can prevent the dust from contacting the adjustable damping buffer device 500 , thereby increasing the service life of the adjustable damping buffer device 500 .

[0042] Reference Figures 1 to 7 As shown, it can be understood that the outer cylinder 420 is provided with a slide groove 421 extending along the length direction of the outer cylinder 420, and the length of the slide groove 421 is equal to the stroke of the inner cylinder 410. The outer wall of the inner cylinder 410 is connected with a positioning portion 411, and the positioning portion 411 can be selected from a hexagon socket head screw. The outer wall of the inner cylinder 410 is provided with a bolt hole for the positioning portion 411 to be threadedly connected, and the positioning portion 411 is embedded in the slide groove 421 and can move along the extension direction of the slide groove 421. When installing, after the inner cylinder 410 is extended into the outer cylinder 420, the bolt hole is aligned with the slide groove 421, and then the positioning portion 411 is threadedly connected to the bolt hole. The stroke of the inner cylinder 410 is limited by the positioning portion 411 to prevent the inner cylinder 410 from detaching from the outer cylinder 420. It can be foreseen that multiple groups of positioning portions 411 and slide grooves 421 can be provided to improve the stability of the limit.

[0043] Reference Figures 4 to 7As shown, it can be understood that the adjustable damping buffer device 500 includes a piston 510, an outer cylinder 520, and an inner cylinder 530, and the outer cylinder 520 and the inner cylinder 530 are both cylindrical. The piston 510 is connected to a piston rod 511, and the piston rod 511 is connected to the inner cylinder 410. The inner cylinder 530 is located inside the outer cylinder 520. The movement of the inner cylinder 410 drives the piston 510 to move in the inner cylinder 530 through the piston rod 511. The piston 510 is slidably installed in the first chamber formed by the inner wall of the inner cylinder 530. A sealing ring is also provided between the piston 510 and the inner wall of the inner cylinder 530, and the piston 510 can move along the length direction of the inner cylinder 530. A second chamber is formed between the inner cylinder 530 and the outer cylinder 520, and the first chamber and the second chamber are connected through a throttle valve 540. Hydraulic oil is filled between the inner cylinder 530 and the outer cylinder 520. When the piston 510 moves in the inner cylinder 530, it can push the hydraulic oil to flow between the first chamber and the second chamber. Since the hydraulic oil has the incompressible property, the resistance to the movement of the piston 510 can be adjusted by controlling the opening of the throttle valve 540.

[0044] Reference Figure 4 As shown, it can be understood that the first chamber and the second chamber are connected through a one-way valve 700, and the one-way valve 700 is arranged in the outer cylinder 520. The one-way valve 700 only allows the fluid in the second chamber to flow into the first chamber. The throttling effect of the one-way valve 700 is small, so that the piston 510 is subjected to less resistance when moving toward the direction close to the stabilizing roller 200. The first chamber and the second chamber are connected to the one-way valve 700 at one end close to the stabilizing rod 100. The first chamber and the second chamber are connected at one end away from the stabilizing rod 100 through a balancing hole. When the piston 510 moves toward the direction close to the stabilizing rod 100, the hydraulic oil in the first chamber moves from the throttle valve 540 to the second chamber, and the hydraulic oil in the second chamber enters the first chamber from the balancing hole. When the piston 510 moves toward the direction away from the stabilizing rod 100, the hydraulic oil in the first chamber moves from the balancing hole to the second chamber, and the hydraulic oil in the second chamber enters the first chamber from the one-way valve 700.

[0045] Reference Figure 4 As shown, it can be understood that the throttle valve 540 is a manual valve, and the cost of using a manually adjusted throttle valve 540 is low. The side wall of the outer cylinder 420 is provided with an operating hole 422 to facilitate the operation of the throttle valve 540, and the side wall of the outer cylinder 420 is bolted with a cover plate capable of closing the operating hole 422. The cover plate can prevent external dust from entering the outer cylinder 420. Before installing the drill pipe stabilizer on the drill pipe, it is necessary to open the cover plate first and adjust the throttle valve 540 to an opening suitable for the current geological conditions and drilling speed. The specific structure of the throttle valve is prior art, so it will not be described in detail.

[0046] Reference Figure 4As shown, it can be understood that the throttle valve 540 is an electric valve, and a controller and a battery for controlling the throttle valve 540 are arranged in the outer cylinder 420. The controller is connected to multiple sensors to determine whether the drill pipe deviates from the preset route of the drill pipe. The types and types of sensors are prior art, so they are not described in detail. The controller automatically controls the opening of the throttle valve 540 to adjust the resistance of the movement of the piston 510, so that the drill pipe automatically returns to the center. The degree of automation is higher, but the stability is poor and the cost is higher. The specific structure of the throttle valve is prior art, so it is not described in detail.

[0047] Reference Figure 4 As shown, it can be understood that the spring 600 is arranged in the inner cylinder 410, one end of the spring 600 is against the outer cylinder 520, and the other end is against the inner wall of the inner cylinder 410. The spring 600 drives the inner cylinder 410 to move away from the outer cylinder 520, so that the stabilizing roller 200 compresses the spring 600 in the process of approaching the stabilizing rod 100. When the stabilizing roller 200 rotates to separate from the inner wall of the borehole, the spring 600 pushes the stabilizing roller 200 away from the stabilizing rod 100, so that the stabilizing roller 200 always maintains a state of abutting against the inner wall of the borehole, further improving stability.

[0048] Reference Figures 1 to 4 As shown, it can be understood that both ends of the stabilizer bar 100 are provided with threads for easy installation on the drill pipe. The hole drilling rig is generally vertical, so the stabilizer bar 100 is generally arranged vertically, and both ends of the stabilizer bar 100 are provided with threads matching the drill pipe for easy connection with the drill pipe.

[0049] Working principle: The stabilizing rod 100 is connected between adjacent drill rods, and rotates synchronously with the drill rods and pushes upward. If the drill rod deviates in the borehole, the drill rod will rotate eccentrically in the borehole. Since the stabilizing rod 100 rotates with the drill rod, the spring 600 pushes the stabilizing roller 200 away from the stabilizing rod 100, so that the stabilizing roller 200 always maintains a state of abutting against the inner wall of the borehole. Therefore, the stabilizing roller 200 will continuously approach and move away from the stabilizing rod 100 during the rolling process along the hole wall. When the stabilizing roller 200 approaches the stabilizing rod 100, the hydraulic oil in the first chamber moves from the throttle valve 540 to the second chamber, and the hydraulic oil in the second chamber enters the first chamber from the balance hole. When the piston 510 moves in the direction away from the stabilizing rod 100, the hydraulic oil in the first chamber moves from the balance hole to the second chamber, and the hydraulic oil in the second chamber enters the first chamber from the one-way valve 700. The reaction force of the inner wall of the borehole on the stabilizing roller 200 pushes the stabilizing rod 100 back to the center of the borehole. By controlling the opening of the throttle valve 540 , it is possible to adjust the resistance of the stabilizing roller 200 moving toward the stabilizing rod 100 , thereby preventing the stabilizing roller 200 from exerting excessive pressure on the inner wall of the borehole.

[0050] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A drill pipe stabilizer for a raise boring machine, characterized in that: include: Stabilizer bar (100); a plurality of stabilizing rollers (200); A stabilizing bracket (300), the stabilizing bracket (300) being connected to the upper end of the stabilizing rod (100), the stabilizing roller (200) being slidably connected to the stabilizing bracket (300) via a sliding portion (400), and a plurality of stabilizing rollers (200) being symmetrically mounted on the side of the stabilizing bracket (300); An adjustable damping buffer device (500) is disposed in the sliding portion (400), and the adjustable damping buffer device (500) is used to provide resistance when the stabilizing roller (200) approaches the stabilizing bracket (300); A spring (600) is disposed in the sliding portion (400), and the spring (600) is used to drive the stabilizing roller (200) away from the stabilizing bracket (300).

2. The drill rod stabilizer for a raise boring machine according to claim 1, characterized in that: The stabilizing roller (200) is a universal wheel.

3. The drill rod stabilizer for a raise boring machine according to claim 1, characterized in that: The sliding part (400) comprises an inner cylinder (410) and an outer cylinder (420), wherein the inner cylinder (410) is inserted into the outer cylinder (420) and can move along the outer cylinder (420), the outer cylinder (420) is connected to the stabilizing bracket (300), and the inner cylinder (410) is connected to the stabilizing roller (200).

4. The drill rod stabilizer for a raise boring machine according to claim 3, characterized in that: The outer cylinder (420) is provided with a slide groove (421) extending along the length direction of the outer cylinder (420); the outer wall of the inner cylinder (410) is connected with a positioning portion (411); the positioning portion (411) is embedded in the slide groove (421) and can move along the slide groove (421).

5. The drill rod stabilizer for a raise boring machine according to claim 3, characterized in that: The adjustable damping buffer device (500) includes a piston (510), an outer cylinder (520), and an inner cylinder (530). The piston (510) is connected to a piston rod (511), and the piston rod (511) is connected to the inner cylinder (410). The piston (510) is slidably installed in a first chamber formed by the inner wall of the inner cylinder (530). A second chamber is formed between the inner cylinder (530) and the outer cylinder (520), and the first chamber and the second chamber are connected via a throttle valve (540).

6. The drill rod stabilizer for a raise boring machine according to claim 5, characterized in that: The first chamber and the second chamber are connected via a one-way valve (700), and the one-way valve (700) only allows the fluid in the second chamber to flow into the first chamber.

7. The drill rod stabilizer for a raise boring machine according to claim 5, characterized in that: The throttle valve (540) is a manual valve. An operating hole (422) is provided on the side wall of the outer cylinder (420) to facilitate operation of the throttle valve (540). A cover plate capable of closing the operating hole (422) is detachably connected to the side wall of the outer cylinder (420).

8. The drill rod stabilizer for a raise boring machine according to claim 5, characterized in that: The throttle valve (540) is an electric valve, and a controller and a battery for controlling the throttle valve (540) are arranged in the outer cylinder (420).

9. The drill rod stabilizer for a raise boring machine according to claim 8, characterized in that: The spring (600) is disposed in the inner cylinder (410), with one end of the spring (600) abutting against the outer cylinder (520) and the other end abutting against the inner wall of the inner cylinder (410).

10. The drill rod stabilizer of a raise boring machine according to claim 1, characterized in that: Both ends of the stabilizing rod (100) are provided with threads to facilitate installation on a drill rod.

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