A blasting hole angle measuring device

Abstract

This application relates to the technical field of blasting holes, and in particular to a blasting hole angle measuring device, which includes a crossbar, a fixed base fixedly connected to one end of the crossbar, a rotating shaft rotatably connected inside the fixed base, a measuring rod fixedly connected to one end of the rotating shaft, an inclinometer body provided at the end of the measuring rod, a sliding groove provided on one side of the crossbar, a connecting rod slidably connected to one end of the sliding groove, a pressure block provided on one side of the measuring rod above the inclinometer body, a second screw rotatably connected to both sides of the end of the measuring rod, a moving rod threadedly connected to one end of each second screw, a stop block fixedly connected to the end of each moving rod, and a handle fixedly connected to the upper end of the crossbar. In this invention, by providing a pressure block, a stop block, a crossbar, a fixed base, a rotating shaft, a measuring rod, a gear, a sliding groove, a first screw, a connecting rod, a rack, and a handle, the inclinometer body is prevented from being directly held and inserted into the blast hole, and safety and stability are improved by using the crossbar and the measuring rod.

Description

Technical Field

[0001] This application relates to the technical field of blasting holes, and in particular to a blasting hole angle measuring device. Background Technology

[0002] Open-pit mining is a method of mining that directly extracts useful minerals from exposed surfaces, characterized by low cost and high efficiency. Open-pit mining obtains underlying mineral resources by stripping overlying rock and soil layers. The main processes include drilling, blasting, loading, transportation, and waste disposal. Drilling is the first step in open-pit mining, its purpose being to provide holes for placing explosives during blasting. In open-pit blasting, the inclination angle of the blasting holes is a crucial factor in ensuring blasting effectiveness and project quality; a handheld inclinometer is commonly used to measure the inclination angle of the blasting holes.

[0003] Chinese Patent Publication No. CN221549670U discloses a device for measuring the angle of blasting boreholes in open-pit deep-hole blasting, belonging to the field of engineering measurement technology. It mainly solves the problem of misalignment between the protractor and the axis of the blasting borehole, proposing the following technical solution: It includes a protractor, with a measuring rod rotatably connected to its back via a pivot. An adjustment mechanism is fixedly connected to the bottom of the measuring rod. The adjustment mechanism further includes a support rod fixed to the bottom of the protractor, with a level fixedly connected to its middle section. A mounting groove is provided on the front of the support rod. Through the cooperation of the support rod, level, mounting groove, and adjustment mechanism, the protractor and the surface of the blasting borehole are aligned on a 180-degree horizontal axis, ensuring the measuring rod is at its axial position. This design achieves axis alignment during measurement, prevents rod misalignment, and further improves the accuracy of borehole inclination angle detection.

[0004] Regarding the aforementioned technologies, the inventors believe that existing blast hole angle measuring devices require manual holding of the inclinometer and insertion into the inner wall of the blast hole for measurement, which poses a risk of slipping and dropping the inclinometer into the hole. Utility Model Content

[0005] To address the issue of accidental drops of the inclinometer into holes, this application provides a device for measuring the angle of blast holes.

[0006] The blast hole angle measuring device provided in this application adopts the following technical solution:

[0007] A device for measuring the angle of a blasting hole includes a crossbar. One end of the crossbar is fixedly connected to a fixed base. A rotating shaft is rotatably connected inside the fixed base. A measuring rod is fixedly connected to one end of the rotating shaft. An inclinometer body is provided at the end of the measuring rod. A gear is rotatably connected to one side of the fixed base at a position corresponding to the rotating shaft. A groove is formed on one side of the crossbar. A first screw is rotatably connected inside the groove. A connecting rod is slidably connected to one end of the groove. A fixed plate is fixedly connected to one side of the measuring rod above the inclinometer body. A telescopic rod is fixedly connected to the bottom side of the fixed plate. A pressure block is fixedly connected to one end of the telescopic rod. A return spring is sleeved on the outside of the telescopic rod. Second screws are rotatably connected to both ends of the measuring rod. A moving rod is threadedly connected to one end of each second screw. A stop block is fixedly connected to the end of each moving rod. A handle is fixedly connected to one upper end of the crossbar.

[0008] Optionally, one end of the rotating shaft passes through the side wall of the fixed seat and is fixedly connected to the gear, and a rack is fixedly connected to the bottom side of one end of the connecting rod, with the gear and the rack meshing with each other.

[0009] Optionally, one end of the first screw is threadedly connected to the connecting rod, and a first knob is rotatably connected to one side of the crossbar at the position corresponding to the first screw. One end of the first screw passes through the side wall of the crossbar and is fixedly connected to the first knob.

[0010] Optionally, the two ends of the return spring are fixedly connected to the fixed plate and the pressure block, respectively. The bottom side of the pressure block abuts against the inclinometer body, and a handle is fixedly connected to the upper end of the pressure block.

[0011] Optionally, the measuring rod has an L-shaped structure, and a second knob is fixedly connected to the end of the second screw.

[0012] Optionally, limiting rods are fixedly connected to both ends of the measuring rod, one end of the moving rod is slidably connected to the corresponding limiting rod, and the stops abut against the side of the inclinometer body.

[0013] In summary, this application includes at least one of the following beneficial technical effects:

[0014] 1. In this utility model, a crossbar, a fixed base, a rotating shaft, a measuring rod, a gear, a sliding groove, a first screw, a connecting rod, a rack, a first knob, and a handle are provided. By holding the handle, the measuring rod is inserted into the blast hole. The crossbar is in contact with the ground and can move laterally along the ground. By rotating the first knob, the first screw is rotated, which in turn drives the connecting rod to move laterally along the sliding groove. Since the rack and gear mesh with each other, the gear is rotated clockwise or counterclockwise, and the rotating shaft and measuring rod rotate accordingly. The angle between the measuring rod and the crossbar can be adjusted. With the horizontal movement of the crossbar, the back side of the measuring rod is adjusted to be completely in contact with the inner wall of the blast hole. At this time, the angle of the blast hole can be measured by the inclinometer body. This avoids the risk of slipping and dropping the instrument into the hole when the inclinometer body is directly inserted into the blast hole by hand. The crossbar and measuring rod improve safety and stability.

[0015] 2. In this utility model, a fixed plate, a telescopic rod, a pressure block, a return spring, a handle, a second screw, a second knob, a moving rod, a stop block, and a limiting rod are provided. After the measurement is completed, the measuring rod is moved out. By rotating the second knob and the second screw on both sides, the moving rod and the stop block are moved away from the inclinometer body. The stop block separates from the inclinometer body, releasing its restriction. At the same time, the handle is pulled upwards, causing the pressure block to detach from the inclinometer body, allowing the inclinometer body to be removed. The reverse is also true. When in use, the inclinometer body is placed at one end of the measuring rod, and its position is limited by the end of the measuring rod, the pressure block, and the stop block. It is easy to install and remove, and the inclinometer body can be replaced in a timely manner. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a bottom view of the present invention.

[0018] Figure 3 This is a side view of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1. Crossbar; 2. Fixed base; 3. Rotating shaft; 4. Measuring rod; 5. Inclinometer body; 6. Gear; 7. Slide groove; 8. First screw; 9. Connecting rod; 10. Rack; 11. First knob; 12. Handle; 13. Fixed plate; 14. Telescopic rod; 15. Pressure block; 16. Return spring; 17. Lifting handle; 18. Second screw; 19. Second knob; 20. Moving rod; 21. Stop block; 22. Limiting rod. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0021] This application discloses a device for measuring the angle of a blast hole. (Refer to...) Figure 1-3The blasting hole angle measuring device includes a crossbar 1, with a fixed base 2 fixedly connected to one end of the crossbar 1. A rotating shaft 3 is rotatably connected inside the fixed base 2, and a measuring rod 4 is fixedly connected to one end of the rotating shaft 3. The length of the crossbar 1 is designed according to the hole diameter, specifically 1.2-2 times the hole diameter. The length of the measuring rod 4 is 0.2m-0.5m. An inclinometer body 5 is installed at the end of the measuring rod 4. The inclinometer body 5 is a portable small inclinometer. A gear 6 is rotatably connected to one side of the fixed base 2 at the position corresponding to the rotating shaft 3. A groove 7 is opened on one side of the crossbar 1, and a first gear 6 is rotatably connected within the groove 7. A connecting rod 9 is slidably connected to one end of the screw 8 and the slide groove 7. A fixing plate 13 is fixedly connected to one side of the measuring rod 4 above the inclinometer body 5. A telescopic rod 14 is fixedly connected to the bottom side of the fixing plate 13. A pressure block 15 is fixedly connected to one end of the telescopic rod 14. A return spring 16 is sleeved on the outside of the telescopic rod 14. A second screw 18 is rotatably connected to both ends of the measuring rod 4. A moving rod 20 is threaded to one end of each second screw 18. A stop block 21 is fixedly connected to the end of each moving rod 20. A handle 12 is fixedly connected to the upper end of the crossbar 1 for easy gripping. The threads on the surfaces of the first screw 8 and the second screw 18 are trapezoidal threads. Comparing the thread helix angle with the equivalent friction angle, the thread helix angle is smaller than the equivalent friction angle. The trapezoidal thread can achieve self-locking. When no external force is applied to the first screw 8 and the second screw 18, the first screw 8 and the second screw 18 remain stationary due to self-locking.

[0022] Reference Figure 2 One end of the rotating shaft 3 passes through the side wall of the fixed seat 2 and is fixedly connected to the gear 6. A rack 10 is fixedly connected to the bottom side of one end of the connecting rod 9. The gear 6 and the rack 10 mesh with each other. One end of the first screw 8 is threadedly connected to the connecting rod 9. A first knob 11 is rotatably connected to one side of the crossbar 1 at the position corresponding to the first screw 8. One end of the first screw 8 passes through the side wall of the crossbar 1 and is fixedly connected to the first knob 11. By rotating the first knob 11, the first screw 8 is driven to rotate, thereby driving the connecting rod 9 to move laterally along the slide groove 7. The movement of the rack 10, due to the meshing of the gear 6, causes the gear 6 to rotate clockwise or counterclockwise, thereby rotating the shaft 3 and the measuring rod 4. The angle between the measuring rod 4 and the crossbar 1 can be adjusted. With the horizontal movement of the crossbar 1, the back side of the measuring rod 4 can be adjusted to be completely in contact with the inner wall of the blast hole. At this time, the angle of the blast hole can be measured through the inclinometer body 5. This avoids the risk of the instrument slipping and falling into the hole when the inclinometer body 5 is directly held in hand and inserted into the blast hole. The crossbar 1 and the measuring rod 4 improve safety and stability.

[0023] Reference Figure 1-3The measuring rod 4 has an L-shaped structure. The two ends of the return spring 16 are fixedly connected to the fixed plate 13 and the pressure block 15, respectively. The bottom side of the pressure block 15 abuts against the inclinometer body 5. The upper end of the pressure block 15 is fixedly connected to the handle 17. The pressure block 15 presses against the inclinometer body 5. The pressure block 15 can be easily pulled by the elastic extension and retraction of the return spring 16, the telescopic rod 14, and the handle 17. The ends of the second screw 18 are all fixedly connected to the second knob 19. The ends of the measuring rod 4 are all fixedly connected to the limit rods 22. One end of each limit rod 22 is fixedly connected to the limit block. One end of each moving rod 20 is slidably connected to the corresponding limit rod 22. The stop blocks 21 abut against the side of the inclinometer body 5. Move the second knob 19 and the second screw 18 on both sides, thereby driving the moving rod 20 and the stop block 21 to move away from the inclinometer body 5 along the corresponding limit rod 22. The stop block 21 separates from the inclinometer body 5, releasing its restriction. At the same time, pull the handle 17 upward, driving the pressure block 15 to disengage from the inclinometer body 5, so that the inclinometer body 5 can be taken out. The reverse is also true. When in use, place the inclinometer body 5 at the end of the measuring rod 4, so that the bottom side of the inclinometer body 5 abuts against the upper side of the bottom rod of the measuring rod 4, and the back side of the inclinometer body 5 abuts against the front side of the measuring rod 4, so as to keep the inclinometer body 5 parallel to the measuring rod 4. The position is limited by the end of the measuring rod 4, the pressure block 15, and the stop block 21, making it easy to install and remove.

[0024] The working principle of this embodiment is as follows: In use, first, the inclinometer body 5 and the measuring rod 4 are installed. The pressure block 15 is pulled upwards by the handle 17, compressing the telescopic rod 14 and the return spring 16, placing the inclinometer body 5 at the end of the measuring rod 4. The bottom side of the inclinometer body 5 abuts against the upper side of the bottom rod of the measuring rod 4, and the back side of the inclinometer body 5 abuts against the front side of the measuring rod 4, maintaining parallelism between the inclinometer body 5 and the measuring rod 4. The handle 17 is released, and the telescopic rod 14 and the return spring 16 return to their original length, causing the pressure block 15 to press against the upper side of the inclinometer body 5. Rotating the second knob 19 and the second screw 18 on both sides causes the moving rod 20 and the stop block 21 to move along the corresponding limiting rod 22 towards the inclinometer body 5, clamping and limiting the inclinometer body 5. This facilitates easy installation and removal, and is convenient for inclinometer applications. When the instrument body 5 malfunctions, replace it with a new inclinometer body 5. Hold the handle 12 and insert the measuring rod 4 into the blast hole. The crossbar 1 should be in contact with the ground and can move laterally along the ground. By turning the first knob 11, the first screw 8 will rotate, which will cause the connecting rod 9 to move laterally along the slide groove 7. Since the rack 10 and the gear 6 mesh with each other, the gear 6 will rotate clockwise or counterclockwise. The rotating shaft 3 and the measuring rod 4 will rotate accordingly, and the angle between the measuring rod 4 and the crossbar 1 can be adjusted. With the horizontal movement of the crossbar 1, the back side of the measuring rod 4 can be adjusted to be completely in contact with the inner wall of the blast hole. At this time, the angle of the blast hole can be measured through the inclinometer body 5. This avoids the risk of the instrument slipping and falling into the hole when the inclinometer body 5 is directly inserted into the blast hole. The crossbar 1 and the measuring rod 4 can be used to improve safety and stability.

[0025] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A blast hole angle measuring device comprising a crossbar (1), characterised in that: One end of the crossbar (1) is fixedly connected to a fixed seat (2), and the fixed seat (2) is rotatably connected to a rotating shaft (3). One end of the rotating shaft (3) is fixedly connected to a measuring rod (4), and the end of the measuring rod (4) is provided with an inclinometer body (5). A gear (6) is rotatably connected to one side of the fixed seat (2) at the position corresponding to the rotating shaft (3). A groove (7) is provided on one side of the crossbar (1), and a first screw (8) is rotatably connected in the groove (7). A connecting rod (9) is slidably connected to one end of the groove (7). A fixing plate (13) is fixedly connected to one side of the measuring rod (4) above the inclinometer body (5). A telescopic rod (14) is fixedly connected to the bottom side of the fixing plate (13). A pressure block (15) is fixedly connected to one end of the telescopic rod (14). A return spring (16) is sleeved on the outside of the telescopic rod (14). A second screw (18) is rotatably connected to both ends of the measuring rod (4). A moving rod (20) is threaded to one end of each of the second screws (18). A stop block (21) is fixedly connected to the end of each of the moving rods (20). A handle (12) is fixedly connected to one end of the upper side of the crossbar (1).

2. A blast hole angle measuring device according to claim 1, characterised in that: One end of the rotating shaft (3) passes through the side wall of the fixed seat (2) and is fixedly connected to the gear (6). A rack (10) is fixedly connected to the bottom side of one end of the connecting rod (9). The gear (6) and the rack (10) mesh with each other.

3. A blast hole angle measuring device according to claim 1, characterised in that: One end of the first screw (8) is threadedly connected to the connecting rod (9). One side of the crossbar (1) is rotatably connected to the first knob (11) at the position corresponding to the first screw (8). One end of the first screw (8) passes through the side wall of the crossbar (1) and is fixedly connected to the first knob (11).

4. A blast hole angle measuring device according to claim 1, characterised in that: The two ends of the reset spring (16) are fixedly connected to the fixed plate (13) and the pressure block (15) respectively. The bottom side of the pressure block (15) abuts against the inclinometer body (5). The upper end of the pressure block (15) is fixedly connected to a handle (17).

5. A blast hole angle measuring device according to claim 1, characterised in that: The measuring rod (4) has an L-shaped structure, and the ends of the second screw (18) are all fixedly connected with a second knob (19).

6. A blast hole angle measuring device according to claim 1, characterised in that: Limiting rods (22) are fixedly connected to both ends of the measuring rod (4), one end of the moving rod (20) is slidably connected to the corresponding limiting rod (22), and the stop block (21) abuts against the side of the inclinometer body (5).

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