Drilling device for blasting shallow-buried goaf of strip mine

Abstract

The invention discloses a drilling device for blasting of a shallow-buried goaf of a strip mine, and relates to the technical field of mine drilling and blasting, the drilling device comprises a drilling frame, a power head is slidably connected to the drilling frame, a guide seat is arranged at the bottom end of the drilling frame, at least one rod replacement clamping jaw is arranged on the drilling frame, and a supporting rod is slidably connected to the guide seat; according to the invention, before calibration, positioning is carried out through contact between the positioning plate and the top ends of the drill rods located in the ground, so that calibration positioning and cleaning of the first positioning piece on the drill rods are carried out from the top ends of the drill rods, namely the position close to the connecting part of the two drill rods; therefore, the problem that the righting angle of the top end of the drill rod has large deviation when the position, close to the lower portion, of the drill rod is calibrated is solved.

Description

Technical Field

[0001] The invention relates to the technical field of mine drilling and blasting, in particular to a drilling device used for blasting shallow goaf areas in open-pit mines. Background Art

[0002] During the mining process, it is often necessary to open a large number of blastholes and then bury explosives in the blastholes to achieve mine blasting. Because the blastholes opened are usually deep, existing down-the-hole drill rigs need to continuously add drill rods to extend the blasthole opening depth when drilling the blastholes. Therefore, after the drill rods drill into the bottom surface, the power head and the drill rods that have entered the bottom surface need to be disassembled several times. After the power head and the drill rods are disassembled, the new drill rod is passed through the guide hole in the guide seat by the rod changing clamp and then connected to the drill rod inside the ground. like Figure 1 As shown, when two drill rods are connected, the overall diameter of the drill rod inside the ground blast hole is longer, which will cause the drill rod itself in the ground to tilt and be misaligned with the axis of the drill rod to be lengthened. The drill rod inside the ground and the new drill rod to be lengthened are threadedly connected, and when connecting, the upper drill rod needs to be assisted by the rod changing clamp and the power head to make the upper drill rod vertically downward and directly contact the top of the lower drill rod again. Under the impact of direct contact, the forced calibration of the lower drill rod is forced to be completed, which will cause a large collision between the two drill rods. With long-term use, the threaded part on the drill rod will be damaged, and when the thread is damaged, the connection between the two drill rods will be unstable, which will not only cause shaking during drilling and affect the drilling accuracy, but also make it difficult to match the two drill rods. Summary of the Invention

[0003] The object of the present invention is to provide a drilling device for blasting shallow goaf areas in open-pit mines, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a drilling device for blasting shallow goaf areas in open-pit mines, comprising a drill frame, a power head being slidably connected to the drill frame, a guide seat being provided at the bottom end of the drill frame, at least one rod-changing clamp being provided on the drill frame, a support rod being slidably connected to the guide seat, and two adjustment assemblies being provided in front of the support rod and being symmetrical about the support rod; The cam is fixedly connected to the bottom of the base plate, and the side wall of the cam is slidably connected to the U-shaped piece. The inner wall of the U-shaped piece is slidably connected to the connecting frame. A third spring is fixedly connected between the connecting frame and the inner wall of the U-shaped piece. The connecting frame is provided with a first positioning piece. The end of the first positioning piece is arc-shaped. The connecting frame is provided with a connecting end. The connecting end is rotatably connected to a support rod. The top of the support rod is rotatably connected to a pressure rod. The bottom of the pressure rod is fixedly connected to a hydraulic rod. The bottom plate is rotatably connected to the A positioning plate is connected, a gear is fixedly connected to the rotating shaft of the positioning plate, the gear is meshed with a rack rod, the rack rod is slidably connected to the inner wall of the base plate in the horizontal direction, a first spring is fixedly connected between the rack rod and the base plate, a baffle is provided on the left side of the rack rod, the baffle is slidably connected to the base plate in the vertical direction, and a second spring is fixedly connected between the baffle and the inner wall of the base plate, after the pressure rod is lowered to the lowest position, the bottom of the pressure rod will press the baffle down to the inside of the base plate, and after the baffle is lowered to the inside of the base plate, the second spring will drive the rack rod to move to the left, thereby causing the positioning plate to rotate upward; A yielding group is provided below the hydraulic rod, and is used to drive the hydraulic rod and the bottom plate away from the middle of the drill frame and to reset the rack rod and the positioning plate after the positioning plate has completed its upward rotation.

[0005] As a further solution of the present invention, a pressure sensor is embedded in the bottom plate, and the pressure sensor is located below the baffle. When the baffle is pressed down to the inside of the bottom plate by the pressure rod, the pressure sensor controls the hydraulic rod to stop shortening.

[0006] As a further solution of the present invention, the yield group includes an L-shaped rod, the L-shaped rod is slidably connected to the guide seat, a cylinder is fixedly connected between the L-shaped rod and the guide seat, the top end of the L-shaped rod is slidably connected to the bottom plate, and the bottom end of the hydraulic rod is fixedly connected to the L-shaped rod; The yielding group further comprises a resetting group, which is used for resetting the rack rod and the positioning plate.

[0007] As a further solution of the present invention, the reset group includes a push rod, which is fixedly connected to the front end of the support rod. When the base plate moves to drive the rack rod to move, the rack rod will be blocked by the push rod and slide along the base plate.

[0008] As a further solution of the present invention, the first positioning member is rotatably connected to the inside of the connecting frame, a torsion spring is sleeved on the rotating shaft of the first positioning member, and a limited end is fixedly connected to the first positioning member, and a guide groove is provided on the outside of the limited end, and the guide groove is opened on the wedge block, the upper part of the guide groove is inclined and the bottom extends vertically outward, and the bottom of the guide groove extends to the outside of the wedge block, and the inclined part of the guide groove is parallel to the inclined surface of the wedge block. The connecting end is slidably connected to the connecting frame in the horizontal direction, and the bottom of the connecting end is located on the left side of the first positioning member and can push the first positioning member to rotate around the rotating shaft, and the end of the connecting end is fixedly connected to the second positioning member, and the second positioning member is arc-shaped and is located on the left side of the first positioning member.

[0009] As a further solution of the present invention, a sealing sheet is rotatably connected to the connecting frame, and the sealing sheet is used to seal and protect the end of the second positioning member.

[0010] As a further solution of the present invention, the support rod is an elastic telescopic rod.

[0011] As a further solution of the present invention, a sponge layer is glued onto the first positioning member.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention, before calibration, first performs positioning by contacting the positioning plate with the top end of the drill rod in the ground, ensuring that the calibration, positioning and cleaning of the drill rod by the first positioning member are performed from the top end of the drill rod, i.e., a position close to the connection portion of the two drill rods, thereby avoiding the problem of a large deviation in the angle of the top end of the drill rod when calibrating the drill rod near the bottom. Furthermore, the positioning of the positioning plate can ensure that the first positioning member works at the top end of the drill rod during each calibration, rather than generating randomness due to different heights of the drill rod extending upward to the guide seat.

[0013] After the first positioning piece contacts the drill rod and calibrates the drill rod, the first positioning piece will remain in contact with the drill rod and descend so that impurities on the surface of the drill rod can be cleaned. This can avoid the impurities that may be contained in the middle of the first positioning piece during direct contact with the drill rod, resulting in low calibration accuracy. Removing impurities by descending can improve calibration accuracy.

[0014] The second positioning member is inside the connecting frame, and before the second positioning member contacts a, the first positioning member cleans the surface of the drill rod that has been drilled into the ground. Therefore, after the first positioning member is separated from the drill rod that has been drilled into the ground, the contact between the second positioning member and the drill rod that has been drilled into the ground will be a fine contact, avoiding the calibration accuracy being affected by impurities, and further improving the accuracy of the threaded connection of the two adjacent drill rods to be connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of two drill rods to be connected that are not coaxial according to the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 A schematic diagram of the adjustment assembly and the guide seat of the present invention; Figure 4 Schematic diagram of the distance between the top of the drill pipe that has been drilled into the ground and the guide seat, where small figures a1, a2 and a3 correspond to the schematic diagrams when the distance between the top of the drill pipe and the guide seat is L1, L2 and L3 respectively; Figure 5 Schematic diagrams of the positioning plate and the drill rod that has been drilled into the ground in different states according to the present invention, wherein sub-figures b1, b2, b3, b4, and b5 correspond, respectively, to a schematic diagram of the positioning plate in the initial state, a schematic diagram of the positioning plate during initial movement before the positioning stage, a schematic diagram of the positioning plate and the drill rod during the positioning stage, a schematic diagram of the positioning plate and the drill rod after calibration, and a schematic diagram after the two positioning plates have been moved away from each other by the clearance group; Figure 6 Schematic diagram of the support rod, pressure rod and positioning plate of the present invention; Figure 7 This is a schematic diagram of the positioning plate of the present invention positioning the top end of the drill rod; Figure 8 This is a schematic diagram of the present invention when the first positioning member has not calibrated the drill rod; Figure 9 This is a schematic diagram of the first positioning member of the present invention in contact with the drill rod but not descending; Figure 10 Schematic diagram of the positional relationship between the bottom plate of the present invention, the wedge-shaped block and the U-shaped member in cross-section; Figure 11 Schematic diagram of the positional relationship between the U-shaped member, the connecting frame and the first positioning member of the present invention; Figure 12 Schematic diagram of the positional relationship between the connecting end, the limiting end and the first positioning member of the present invention; Figure 13 Schematic diagram of the positional relationship between the limiting end, the connecting frame and the first positioning member of the present invention; Figure 14 Schematic diagram of the positional relationship between the second positioning member and the connecting end, and the first positioning member and the limiting end of the present invention; Figure 15 This is a schematic diagram of the present invention after the limiting end moves to the outside of the guide groove; Figure 16 This is a schematic diagram of the present invention after the connecting end pushes the first positioning member to rotate and the second positioning member to extend; Figure 17Schematic diagram of the positional relationship between the guide seat, the cylinder and the L-shaped rod of the present invention; Figure 18 Schematic diagram of the positional relationship between the L-shaped rod, the base plate and the support rod of the present invention; Figure 19 Schematic diagram of the positional relationship between the first spring, the second spring, the baffle and the rack rod of the present invention; Figure 20 This is a schematic diagram of the present invention in a vertical state when the positioning plate follows the bottom plate to move toward the push rod; Figure 21 This is a schematic diagram of the positioning plate of the present invention moving from a vertical state following the bottom plate to contacting the push rod; Figure 22 Schematic diagram of the connection between the sponge layer and the first positioning member of the present invention; Figure 23 Schematic diagram of the connection between the base plate and the wedge block of the present invention; Figure 24 It is a schematic diagram of the sliding of the connecting frame and the U-shaped member of the present invention; Figure 25 Schematic diagram of the connection between the support rod and the drill frame of the present invention.

[0016] The reference numerals are as follows: 1. Drilling rig; 2. Power head; 3. Guide seat; 4. Rod changing jaw; 5. Support rod; 6. Base plate; 7. Wedge block; 8. Connecting frame; 9. First positioning member; 10. Connecting end; 11. Support rod; 12. Pressure rod; 13. Hydraulic rod; 14. Positioning plate; 15. Rack rod; 16. First spring; 17. Baffle; 18. Second spring; 19. L-shaped rod; 20. Cylinder; 21. Push rod; 22. Limit end; 23. Guide groove; 24. Torsion spring; 25. Second positioning member; 26. Sealing piece; 27. Sponge layer; 28. U-shaped member; 29. ​​Third spring; 30. Gear. DETAILED DESCRIPTION

[0017] See also Figure 1-Figure 25 The present invention provides a technical solution: a drilling device for blasting shallow goaf areas in open-pit mines, comprising a drill frame 1, a power head 2 being slidably connected to the drill frame 1, a guide seat 3 being provided at the bottom end of the drill frame 1, at least one rod-changing clamp 4 being provided on the drill frame 1, a support rod 5 being slidably connected to the guide seat 3, and two adjustment assemblies being symmetrical about the support rod 5 being provided in front of the support rod 5; The adjustment assembly includes a base plate 6, which is slidably connected to the support rod 5 in the horizontal direction. A wedge block 7 is fixedly connected to the bottom of the base plate 6, and a U-shaped piece 28 is slidably connected to the side wall of the wedge block 7. The inner wall of the U-shaped piece 28 is slidably connected to a connecting frame 8. A third spring 29 is fixedly connected between the connecting frame 8 and the inner wall of the U-shaped piece 28. A first positioning member 9 is provided on the connecting frame 8. The end of the first positioning member 9 is arc-shaped. A connecting end 10 is provided on the connecting frame 8. A support rod 11 is rotatably connected to the connecting end 10. The top of the support rod 11 is rotatably connected to a pressure rod 12. The bottom of the pressure rod 12 is fixedly connected to a hydraulic rod 13. The base plate 6 is rotatably connected to a positioning plate 14. The positioning plate 14 is rotatably connected to the base plate 6. A gear 30 is fixedly connected to the rotating shaft of the plate 14, and the gear 30 is meshed with a rack rod 15. The rack rod 15 is connected to the inner wall of the bottom plate 6 in a horizontal sliding direction. A first spring 16 is fixedly connected between the rack rod 15 and the bottom plate 6. A baffle 17 is provided on the left side of the rack rod 15. The baffle 17 is connected to the bottom plate 6 in a vertical sliding direction. A second spring 18 is fixedly connected between the baffle 17 and the inner wall of the bottom plate 6. After the pressure rod 12 drops to the lowest position, the bottom of the pressure rod 12 will press the baffle 17 down to the inside of the bottom plate 6. After the baffle 17 drops to the inside of the bottom plate 6, the second spring 18 will drive the rack rod 15 to move to the left, thereby causing the positioning plate 14 to rotate upward; A clearance group is provided below the hydraulic rod 13 for driving the hydraulic rod 13 and the bottom plate 6 away from the middle of the drilling rig 1 and resetting the rack rod 15 and the positioning plate 14 after the positioning plate 14 rotates upward.

[0018] See also Figure 2-Figure 12 , Figure 23-Figure 25 : The drilling rig 1 is driven by a machine body (the machine body is common knowledge in the prior art) to complete the tilting and lifting work. Figure 2 There are three drill rods in different positions, and all of them are distributed in a commonly used manner in the prior art. The drill rod in position a is a drill rod that has been drilled into the ground, the drill rod in position b is a drill rod that is connected to the power head 2 at the top but is waiting to be connected to the top of the drill rod in position a at the bottom. The power head 2 can slide up and down along the drill frame 1 and drive the drill rod to rotate. The drill rod in position c is a drill rod that is on one side of the drill rod in position b and is waiting to be moved to the bottom of the power head 2 (i.e., position b) by the rod-changing clamp 4, and the drill rod in position c itself is on a bracket, which is used to support multiple drill rods at the drill rod in position c. This is prior art and will not be described in detail here (the drill rods in position a, position b, and position c are briefly described as a, b, and c below); When adding drill rod a, the power head 2 will separate from a after a drills into the ground. At this time, a will stay in the ground and wait for the next drill rod (i.e., the drill rod at position b, hereinafter referred to as b) to be connected with it. The position of a near the top is inside the guide hole of the guide seat 3, and then the rod changing clamp 4 moves the drill rod at position c to position b and waits for connection with a. Because a is inside the ground, and a inside the ground is composed of multiple drill rods connected to each other, the fulcrum of a during drilling operations and connection is at the top (i.e., on the power head 2). Due to the slenderness effect of a, the bottom end of a inside the ground will be relatively tilted relative to the top end, and after the top end of a is separated from the power head 2, the top end of a loses its restraint. Under the rigidity of a, the top end of a is displaced relative to the position when the power head 2 was initially connected, and the center point of the power head 2 and the center point of the circle of b are on the same axis, so that the center point of a is tilted relative to the center point of the circle of b, resulting in the top end of a and the bottom end of b cannot be completely aligned. As a result, when the power head 2 is connected to the top end of b and drives b down to contact the top end of a, the internal thread and the external thread cannot be accurately connected, and a collision occurs, causing damage to the thread. Therefore, a needs to be adjusted before a and b are connected; It is worth noting that the distances L1, L2 and L3 between the top of a and the top of the guide seat 3 are different after it is inside the ground. Figure 4 As shown in the small figures a1, a2 and a3 in the figure, small figures a1, a2 and a3 respectively correspond to the schematic diagrams when the distance between the top end of a and the guide seat 3 is L1, L2 and L3. Since the separation of the power head 2 and a is operated by the operator at will, it is only necessary to ensure that the top end of a is lower than the rod-changing clamping claw 4 below after a is separated from the power head 2. Therefore, the straight-line height of the top end of a from the ground is not exactly the same each time the machine stops; Before adjustment, the top height of a will be positioned by two positioning plates 14; Positioning phase: Before positioning, the two bottom plates 6 are respectively located on the leftmost and rightmost sides of the support rod 5. Figure 5 As shown in the small figure b1 in the figure, at this time, the right end of the left positioning plate 14 and the left end of the right positioning plate 14 are respectively located on the left and right sides of a, and at this time the height of the support rod 5 is higher than the top of a. When adjusting, the power head 2 is separated from the top of a and moved to the top, and then the rod changing claw 4 clamps the drill rod at position c and transports it to position b (the rod changing claw 4 and the power head 2 are common knowledge in the prior art, and their use and installation are conventional settings and will not be described in detail). Here, the power head 2 will drop to connect with the top of b. After the connection is completed, the rod changing claw 4 can be separated from b and reset; And after the power head 2 is connected to the top of b, the power head 2 will not immediately drive b down, but will make the two bottom plates 6 move to the middle position of the support rod 5 respectively through the yield group, so that the two positioning plates 14 are Figure 5 The small and medium-sized images b1 are transformed into Figure 5As shown in the small and medium-sized figure b2, at this time, the two positioning plates 14 will move from the left and right sides of a to the top of a, and then shorten the hydraulic rod 13. When the hydraulic rod 13 shortens, the support rod 11 and the pressure rod 12 will drop synchronously, and the support rod 5 will also move with the bottom plate 6 under its own gravity. The bottom plate 6 will slide down along the guide seat 3. After the bottom of the positioning plate 14 contacts the top of a, the positioning plate 14 will be blocked and cannot continue to fall. The contact between the positioning plate 14 and the top of a forms a support. At this time, the bottom plate 6 and the support rod 5 will stay here. At this time, the positional relationship between the two positioning plates 14 and a is as shown in FIG. Figure 5 Small and medium-sized pictures b3 and Figure 7 As shown; Calibration phase: When the connecting frame 8 moves to the rightmost side of the wedge block 7, the first positioning member 9 moves to the position in contact with the top of a and forcibly calibrates the inclined a. Figure 8 The transformation shown Figure 9 The state shown enables the top end of a to be transformed from an inclined state to be coaxial with b for subsequent connection, while the rear pressure rod 12 continues to descend under the shortening of the hydraulic rod 13; Therefore, when the first positioning member 9 follows the connecting frame 8 to vertically descend, it will clean the outer wall of a from the top downward, so that the dirt and other impurities with strong adhesion attached to the outside of a will be cleaned (the impurities are mainly mineral dust such as dirt attached to the outer wall during the drilling process, which will have strong adhesion when the drill rod is drilling for a long time). After cleaning the outer wall of a, a can be in a clean state, and then, in the initial stage of calibration of a by the first positioning member 9, it will not be blocked by the impurities on the outer wall of a, resulting in a decrease in the calibration accuracy of a between the first positioning member 9 and a due to the presence of impurities, but will drop slightly after calibration to push away the impurities, thereby improving the efficiency of calibration. Because before calibration, the height of the top end of a is determined by contact between the positioning plate 14 and the top end of a, thereby positioning the top end of a, ensuring that the calibration, positioning and cleaning of the drill rod by the first positioning member 9 are carried out from the top end of the drill rod (that is, the position close to the connection part of the two drill rods), thereby avoiding the problem of large deviation in the angle of the top end of the drill rod when calibrating the drill rod near the bottom. In addition, the positioning of the positioning plate 14 can ensure that the first positioning member 9 works at the top end of the drill rod during each calibration, avoiding randomness in the height position of the first positioning member 9 for calibrating a due to different distances (L1, L2 and L3) between the top end of the drill rod a and the guide seat 3. This randomness is manifested in that when the distance between the top end of a and the guide seat 3 is short, the initial position of the first positioning member 9 is too high (for example, after the first positioning member 9 drops to the bottom, it is still higher than the top end of a, resulting in inability to calibrate); when the distance between the top end of a and the guide seat 3 is long, the calibration position of the first positioning member 9 is too low (the calibration position of the first positioning member 9 is much lower than the top end of a), resulting in inaccurate calibration accuracy; After the first positioning member 9 contacts the drill rod a and calibrates the drill rod a, the first positioning member 9 will descend while remaining in contact with the drill rod, allowing impurities on the surface of the drill rod to be cleaned. This can prevent the first positioning member 9 from directly contacting the drill rod and causing impurities to be present between them, which could lead to poor calibration accuracy. By removing impurities through the descending process, the calibration accuracy can be improved. Then, after the U-shaped member 28 slides down along the side wall of the wedge block 7 to the limit position, the hydraulic rod 13 will stop descending, and at this time, the bottom end of the pressure rod 12 will press down the baffle 17 so that the baffle 17 is pressed into the interior of the bottom plate 6. At this time, the baffle 17 will slide down and compress the second spring 18. After the baffle 17 drops to a position lower than the rack rod 15, the first spring 16 will push the two rack rods 15 to slide to both sides along the bottom plate 6. At this time, the rack rod 15 will mesh with the gear 30 and drive the gear 30 and the positioning plate 14 to rotate until the ends of the positioning plate 14 are at the positions on both sides of a, as shown in FIG. Figure 5 As shown in the small and medium-sized figures b4, at this time, the power head 2 can drive b to descend to the position of contact with the top of a for connection, and then the making way group will drive the hydraulic rod 13 and the bottom plate 6 to move synchronously to both sides of the drilling rig 1, so that the first positioning member 9 is separated from a, and the bottom plate 6 will also slide to both sides along the support rod 5. At this time, the positioning plate 14 will move to both sides of a to make way when the subsequent power head 2 drives b to connect with a, that is, Figure 5 In the state shown in the small and medium-sized figures b5, the connection between a and b is completed, and the two positioning plates 14 will be separated from the top of a. When b and a are connected, the power head 2 drives b, which has been connected to a, to rotate and then the drilling operation can be carried out.

[0019] The two positioning plates 14 are Figure 5 The small picture b4 in the figure is transformed into Figure 5As shown in the small figure b5, since the two positioning plates 14 have been separated from the top of a at this time, and the two first positioning members 9 have also been separated from a, the bottom plate 6 and the support rod 5 will lose support after the positioning plate 14 is separated from the top of a. At this time, the bottom plate 6 will slide down along the guide seat 3 under its own gravity and thus descend relative to the pressure rod 12. When the first positioning member 9 is separated from a, the third spring 29 will pull the connecting frame 8 to slide along the U-shaped member 28 and drive the first positioning member 9 to reset. At this time, the connecting end 10 and the support rod 11 will also be reset synchronously. When the support rod 5 and the bottom plate 6 descend relative to the pressure rod 12, the baffle 17 will be separated from the pressure rod 12, and the yielding group will reset the rack rod 15 and the positioning plate 14. That is, after the two positioning plates 14 are separated from the top of a, the bottom plate 6 and the support rod 5 will directly drop, and the connecting frame 8, the connecting end 10, the support rod 11, the positioning plate 14 and the positioning plate 14 will be reset, and the positioning group will drive the positioning plate 14 and the rack rod 15 to reset, so that the positioning plate 14 is Figure 5 The state shown in the small and medium-sized figure b5 changes to Figure 5 The initial state shown in the small and medium-sized figure b1 is awaiting subsequent work.

[0020] A pressure sensor is embedded inside the base plate 6. The pressure sensor is common knowledge in the prior art. Its installation and use are conventional settings and will not be described or demonstrated in detail. The pressure sensor is located below the baffle 17. When the baffle 17 is pressed down to the inside of the base plate 6 by the pressure rod 12, the pressure sensor will control the hydraulic rod 13 to stop shortening.

[0021] The pressure sensor provided can trigger the hydraulic rod 13 to stop further shortening after the baffle 17 drops to the limit position. The pressure sensor is a prior art and will not be further demonstrated or described.

[0022] The yield group includes an L-shaped rod 19, which is slidably connected to the guide seat 3. A cylinder 20 is fixedly connected between the L-shaped rod 19 and the guide seat 3. The top end of the L-shaped rod 19 is slidably connected to the bottom plate 6, and the bottom end of the hydraulic rod 13 is fixedly connected to the L-shaped rod 19. The yielding group further includes a resetting group, which is used to reset the rack rod 15 and the positioning plate 14 .

[0023] like Figure 3 、 Figures 17-21 As shown: when the hydraulic rod 13 is extended or retracted, the base plate 6 will slide along the L-shaped rod 19. When the cylinder 20 is extended, it will push the L-shaped rod 19 to slide along the guide seat 3 and drive the hydraulic rod 13 to move. When the L-shaped rod 19 moves, it will drive the base plate 6 to slide along the support rod 5.

[0024] The reset group includes a push rod 21 , which is fixedly connected to the front end of the support rod 5 . When the bottom plate 6 moves to drive the rack rod 15 to move, the rack rod 15 will be blocked by the push rod 21 and slide along the bottom plate 6 .

[0025] When adjusting, first the cylinder 20 should be shortened so that the positioning plate 14 is Figure 5 The small and medium-sized figures b1 move to the state shown in the small figure b2. At this time, the positioning plates 14 of the two adjustment components move from the initial expanded state (b1) to the middle (b2), contacting the top of the drill rod a and determining its height (L1 / L2 / L3). Then, the hydraulic rod 13 is shortened, and the pressure rod 12 pushes the U-shaped member 28 down the inclined surface of the wedge block 7, driving the first positioning member 9 to move horizontally to clamp the drill rod a for calibration. The curved surface of the first positioning member 9 contacts the drill rod a and cleans the surface attachments to improve the accuracy of the calibration. Then, a and b can be connected; Then the cylinder 20 extends to keep the two positioning plates 14 in a vertical position and follow the bottom plate 6 to move along the support rod 5 toward the push rod 21 (as shown in FIG. Figure 20 As shown), at this time, the baffle 17 has been pressed down to the inside of the bottom plate 6 by the pressure rod 12. At this time, the end of the rack rod 15 is above the baffle 17 and the baffle 17 blocks it. At this time, the second spring 18 has a tendency to drive the baffle 17 to rise, but it is blocked by the lateral obstruction of the rack rod 15 and cannot move. As the cylinder 20 extends, the distance between the two positioning plates 14 will gradually increase. When the rack rod 15 moves to contact with the push rod 21, the cylinder 20 continues to move the bottom plate 6. Because the push rod 21 is fixedly connected to the support rod 5 and the push rod 21 is already in contact with the rack rod 15 (as shown), the bottom plate 6 continues to move. Figure 21 As shown), at this time, the rack rod 15 is blocked by the push rod 21 so that when the base plate 6 moves to the left relative to the push rod 21, the push rod 21 can push the rack rod 15 to move to the right on the base plate 6, so that the engagement between the rack rod 15 and the gear 30 drives the positioning plate 14 to reset from vertical to horizontal. When the rack rod 15 moves to the right side of the baffle 17, the second spring 18 drives the baffle 17 to slide and rise along the inside of the base plate 6, and then the cylinder 20 extends to its maximum extent. At this time, the two positioning plates 14 are Figure 5 As shown in the small and medium-sized figures b1.

[0026] The first positioning member 9 is rotatably connected to the inside of the connecting frame 8. A torsion spring 24 is sleeved on the rotating shaft of the first positioning member 9. A limited end 22 is fixedly connected to the first positioning member 9. A guide groove 23 is provided on the outside of the limited end 22. The guide groove 23 is opened on the wedge block 7. The upper part of the guide groove 23 is inclined and the bottom extends vertically outward. The bottom of the guide groove 23 extends to the outside of the wedge block 7. The inclined part of the guide groove 23 is parallel to the inclined surface of the wedge block 7. The connecting end 10 is slidably connected to the connecting frame 8 in the horizontal direction. The bottom of the connecting end 10 is located on the left side of the first positioning member 9 and can push the first positioning member 9 to rotate around the rotating shaft. The end of the connecting end 10 is fixedly connected to the second positioning member 25. The second positioning member 25 is arc-shaped and is located on the left side of the first positioning member 9.

[0027] Fine calibration stage: like Figure 6-Figure 16 As shown, the first positioning member 9 is rotatably connected to the inside of the connecting frame 8, and the top of the first positioning member 9 is fixedly connected to the limiting end 22, which is located inside the guide groove 23. The limiting end 22 is blocked by the inclined portion of the guide groove 23 so that the limiting end 22 is stuck in the inclined portion of the guide groove 23 and cannot rotate, thereby preventing the first positioning member 9 from rotating relative to the connecting frame 8; When the pressure rod 12 descends and pushes the connecting end 10 through the support rod 11, the connecting end 10 has a tendency to slide along the connecting frame 8, but because the limiting end 22 on the first positioning member 9 is locked by the inclined portion of the guide groove 23 and cannot rotate, although the connecting end 10 has a tendency to push the first positioning member 9 to move, the limiting end 22 is inside the guide groove 23 and cannot rotate, so that the connecting end 10 cannot move horizontally, thereby forcing the connecting end 10, the connecting frame 8, the first positioning member 9 and the U-shaped member 28 to descend synchronously. When the U-shaped member 28 slides down along the wedge block 7, the bottom of the connecting frame 8 contacts the inclined surface of the wedge block 7, causing the connecting end 10 to slide horizontally. The connecting frame 8 slides along the U-shaped member 28 and stretches the third spring 29. Since the inclined surface of the wedge block 7 is parallel to the inclined portion of the guide groove 23, the limiting end 22 will gradually move along the inclined portion of the guide groove 23 when the connecting frame 8 tilts down. After the first positioning member 9 contacts a, it will preliminarily calibrate the position of a near the top. At this time, the limiting end 22 will move from the inclined portion of the guide groove 23 to the vertical portion of the guide groove 23. When the limiting end 22 descends in the vertical portion of the guide groove 23, the connecting frame 8 will vertically descend along the vertical surface of the wedge block 7. At this time, the first positioning member 9 can clean the surface of a. When the U-shaped member 28 slides down to the bottom along the wedge block 7, the limiting end 22 moves to the outside of the guide groove 23, as shown in FIG. Figure 15 As shown, it has not separated from the left side wall of the wedge block 7, that is, the limit end 22 can no longer limit the rotation of the connecting frame 8. At this time, the pressure rod 12 continues to descend and will push the connecting end 10 to slide along the connecting frame 8 through the support rod 11. The bottom end of the connecting end 10 will push the top end of the first positioning member 9. At this time, the first positioning member 9 will rotate around the rotation axis and compress the torsion spring 24. At this time, the end of the first positioning member 9 will be out of contact with a, but because the second positioning member 25 is on the left side of the first positioning member 9, the second positioning member 25 will be a small distance away from a after the first positioning member 9 contacts a. When the connecting end 10 is pushed by the support rod 11 and slides along the connecting frame 8, it will drive the second positioning member 25 to slide quickly out of the inside of the connecting frame 8 until it contacts a to continue to calibrate a. Because the second positioning member 25 is inside the connecting frame 8, and the first positioning member 9 cleans the surface of the drill rod that has been drilled into the ground before the second positioning member 25 contacts a, the contact between the second positioning member 25 and the drill rod that has been drilled into the ground after the first positioning member 9 is separated from the drill rod that has been drilled into the ground is a fine contact, which avoids the calibration accuracy being affected by impurities, and further improves the accuracy of the threaded connection between the two adjacent drill rods to be connected; When the second positioning member 25 is in contact with a, the pressure rod 12 will drop to the limit. At this time, the support rod 11 will be in a horizontal state to maintain the calibration of a, and then the pressure rod 12 presses the baffle 17 to the inside of the bottom plate 6. When the baffle 17 is pressed down by the pressure rod 12, its side will keep in contact with the side wall of the rack rod 15 and gradually drop down. Before the baffle 17 is pressed down to the top below the rack rod 15, the second positioning member 25 has already contacted with a and clamped and calibrated a. After the baffle 17 drops to the bottom of the rack rod 15, the first spring 16 drives the rack rod 15 to move, and then the positioning plate 14 is moved by the gear 30. Figure 5 The small and medium pictures b3 are rotated to the following Figure 5 The state shown in the middle and small figure b4, at this time, the two second positioning members 25 continue to contact a and force a to be clamped, and then the positioning plate 14 rotates to Figure 5 As shown in the inset b4, the two second positioning members 25 bear the lateral positive pressure exerted by the pressure rods 12 and the support rods 11 on both sides, thereby maintaining the mandatory calibration of a, and at this time the two positioning plates 14 make way for the descent of b, and then the power head 2 drives b to descend to connect with a. After b and a are connected, the cylinder 20 is started, and the cylinder 20 extends to push the L-shaped rod 19 to slide along the guide seat 3 and drive the hydraulic rod 13 and the bottom plate 6 to move away from a. During this process, the positioning plate 14 will also be reset, and the second positioning member 25 will be disengaged from a, and then the power head 2 can drive a and b to rotate to perform drilling work; After the second positioning member 25 is separated from a, the support rod 5 and the base plate 6 will drop under their own gravity and pull the support rod 11. At this time, the U-shaped member 28 will be pulled upward and the connecting frame 8 will rotate toward the inside of the connecting frame 8 with the assistance of the torsion spring 24. At this time, the limiting end 22 will rotate to the bottom of the vertical part of the guide groove 23 and then directly enter the inside of the guide groove 23 until the adjustment assembly is reset to the initial state.

[0028] A sealing piece 26 is rotatably connected to the connecting frame 8 , and the sealing piece 26 is used to seal and protect the end of the second positioning member 25 .

[0029] like Figure 8 Figure 9 As shown, the sealing sheet 26 can prevent the end of the second positioning member 25 from being exposed to the outside when not in use, thereby preventing impurities from adhering to the surface and affecting the precision quality.

[0030] The support rod 11 may be an elastic telescopic rod; Figure 16 As shown: when the support rod 11 is an elastic telescopic rod, the support rod 11 can be compressed to the limit between the second positioning member 25 and the pressure rod 12 when the support rod 11 is horizontal, so that when the support rod 11 is horizontal, a large lateral positive pressure is applied to the second positioning member 25 so that the second positioning member 25 still has a clamping force. At this time, the force compressed by the support rod 11 can ensure that the second positioning member 25 will not be detached after the positioning plate 14 rotates upward to no longer contact a.

[0031] A sponge layer 27 is glued onto the first positioning member 9 .

[0032] like Figure 22 As shown: after the first positioning member 9 is cleaned and scraped, the outer wall of a can be wiped by the sponge layer 27 to ensure the cleanliness of a, thereby improving the accuracy of the calibration of the second positioning member 25.

Claims

1. A drilling device for blasting shallow goaf in open-pit mines, comprising a drill frame (1), a power head (2) being slidably connected to the drill frame (1), a guide seat (3) being provided at the bottom end of the drill frame (1), and at least one rod-changing clamping claw (4) being provided on the drill frame (1), characterized in that: A support rod (5) is slidably connected to the guide seat (3), and two adjustment components are provided in front of the support rod (5) and are symmetrical with respect to the support rod (5); The adjustment assembly includes a base plate (6), the base plate (6) and the support rod (5) are slidably connected in the horizontal direction, the bottom of the base plate (6) is fixedly connected to a wedge block (7), the side wall of the wedge block (7) is slidably connected to a U-shaped member (28), the inner wall of the U-shaped member (28) is slidably connected to a connecting frame (8), a third spring (29) is fixedly connected between the connecting frame (8) and the inner wall of the U-shaped member (28), a first positioning member (9) is provided on the connecting frame (8), the end of the first positioning member (9) is arc-shaped, the connecting frame (8) is provided with a connecting end (10), the connecting end (10) is rotatably connected to a support rod (11), the top of the support rod (11) is rotatably connected to a pressure rod (12), the bottom of the pressure rod (12) is fixedly connected to a hydraulic rod (13), the base plate (6) is rotatably connected to a positioning plate (1 4), a gear (30) is fixedly connected to the rotating shaft of the positioning plate (14), and the gear (30) is meshed with a rack rod (15), and the rack rod (15) is connected to the inner wall of the bottom plate (6) in a horizontal sliding direction, and a first spring (16) is fixedly connected between the rack rod (15) and the bottom plate (6), and a baffle (17) is provided on the left side of the rack rod (15), and the baffle (17) is connected to the bottom plate (6) in a vertical sliding direction, and a second spring (18) is fixedly connected between the baffle (17) and the inner wall of the bottom plate (6), and after the pressure rod (12) is lowered to the lowest position, the bottom of the pressure rod (12) will press the baffle (17) down to the inside of the bottom plate (6), and after the baffle (17) is lowered to the inside of the bottom plate (6), the second spring (18) will drive the rack rod (15) to move leftward, thereby causing the positioning plate (14) to rotate upward; A clearance group is provided below the hydraulic rod (13), and the clearance group is used to drive the hydraulic rod (13) and the bottom plate (6) away from the middle of the drilling frame (1) and to reset the rack rod (15) and the positioning plate (14) after the positioning plate (14) has completed its upward rotation.

2. The drilling device for blasting shallow goaf in open-pit mines according to claim 1, characterized in that: A pressure sensor is embedded inside the bottom plate (6), and the pressure sensor is located below the baffle (17). When the baffle (17) is pressed down to the inside of the bottom plate (6) by the pressure rod (12), the pressure sensor controls the hydraulic rod (13) to stop shortening.

3. The drilling device for blasting shallow goaf in open-pit mines according to claim 1, characterized in that: The yielding group comprises an L-shaped rod (19), the L-shaped rod (19) is slidably connected to the guide seat (3), a cylinder (20) is fixedly connected between the L-shaped rod (19) and the guide seat (3), the top end of the L-shaped rod (19) is slidably connected to the bottom plate (6), and the bottom end of the hydraulic rod (13) is fixedly connected to the L-shaped rod (19); The yielding group also includes a reset group, which is used to reset the rack rod (15) and the positioning plate (14).

4. The drilling device for blasting shallow goaf in open-pit mines according to claim 3, characterized in that: The reset group includes a push rod (21), and the push rod (21) is fixedly connected to the front end of the support rod (5). When the bottom plate (6) moves to drive the rack rod (15) to move, the rack rod (15) is blocked by the push rod (21) and slides along the bottom plate (6).

5. The drilling device for blasting shallow goaf in open-pit mines according to claim 1, characterized in that: The first positioning member (9) is rotatably connected to the inside of the connecting frame (8), a torsion spring (24) is sleeved on the rotating shaft of the first positioning member (9), a limited end (22) is fixedly connected to the first positioning member (9), and a guide groove (23) is provided on the outside of the limited end (22), the guide groove (23) is opened on the wedge block (7), the upper part of the guide groove (23) is inclined and the bottom extends vertically outward, the bottom of the guide groove (23) extends to the outside of the wedge block (7), the inclined part of the guide groove (23) is parallel to the inclined surface of the wedge block (7), the connecting end (10) is slidably connected to the connecting frame (8) in the horizontal direction, the bottom of the connecting end (10) is located on the left side of the first positioning member (9) and can push the first positioning member (9) to rotate around the rotating shaft, and the end of the connecting end (10) is fixedly connected to the second positioning member (25), the second positioning member (25) is arc-shaped and is located on the left side of the first positioning member (9).

6. The drilling device for blasting shallow goaf in open-pit mines according to claim 5, characterized in that: A sealing sheet (26) is rotatably connected to the connecting frame (8), and the sealing sheet (26) is used to seal and protect the end of the second positioning member (25).

7. The drilling device for blasting shallow goaf in open-pit mines according to claim 1, characterized in that: The support rod (11) is an elastic telescopic rod.

8. The drilling device for blasting shallow goaf in open-pit mines according to claim 1, characterized in that: A sponge layer (27) is glued onto the first positioning member (9).

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