A device for measuring the angle of support anchor bolts in coal mine roadways

Abstract

This utility model discloses a coal mine roadway support anchor bolt angle measuring device, belonging to the field of coal mine mining safety equipment. It includes a semi-circular scale, a fixed base at the top of the semi-circular scale, an L-shaped frame at the top of the fixed base, blind holes at both ends of the L-shaped frame, a locking and positioning component on the side of the L-shaped frame near the blind holes, a locking component on one side of the L-shaped frame, and a rope on the front of the semi-circular scale. This utility model has a simple structure, is easy to operate, and has high measurement accuracy. It can measure both the vertical and horizontal tilt angles of anchor bolts. It is also suitable for measuring the angles of anchor bolts of different diameters, making it highly practical. Furthermore, the modular structure of the semi-circular scale, L-shaped frame, and gravity hammer allows for easy assembly and disassembly, facilitating storage, portability, and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of safety equipment technology for coal mining, and in particular to a device for measuring the angle of support anchor bolts in coal mine roadways. Background Technology

[0002] In coal mining, roadway support is a crucial aspect of ensuring mining safety. As a commonly used roadway support method, the installation angle of anchor bolts directly affects the support effect. If the anchor bolt angle does not meet design requirements, it will reduce the stability of the roadway support and may lead to safety accidents such as roadway collapse. Therefore, after construction, a professional testing unit needs to measure and test the angle of the support anchor bolts.

[0003] Currently, the angle measurement of anchor bolts supporting coal mine roadways mostly adopts the traditional method of using a protractor in conjunction with a spirit level. This method has many drawbacks. During the measurement process, the protractor needs to be manually held and placed against the surface of the anchor bolt, which is difficult to operate. The hand is prone to shaking and instability, which leads to inaccurate measurements. In addition, traditional angle measuring devices are generally large in size and not easy to carry and store, making it difficult to meet the needs of efficient and accurate measurement in coal mines. Utility Model Content

[0004] The purpose of this utility model is to solve the problems of difficult operation and large measurement error of existing coal mine roadway support anchor bolt angle measuring devices, and to propose a coal mine roadway support anchor bolt angle measuring device.

[0005] To achieve the above objectives, this utility model employs the following technology: a coal mine roadway support anchor bolt angle measuring device, comprising a semi-circular scale, a fixed base at the top of the semi-circular scale, an L-shaped frame at the top of the fixed base, blind holes at both ends of the L-shaped frame, a locking and positioning component on the side of the L-shaped frame near the blind holes, a locking component on one side of the L-shaped frame, a rope on the front of the semi-circular scale, a gravity hammer fixedly connected to the bottom end of the rope, a fixed rod fixedly connected to the fixed base, an annular stop block fixedly connected to one end of the fixed rod, and an elastic rubber sleeve fitted onto the fixed rod fixedly connected to the top end of the rope.

[0006] As a further description of the above technical solution: the locking and positioning assembly includes an adjusting screw threadedly connected to an L-shaped frame, an adjusting knob fixedly connected to the top end of the adjusting screw, and a stop plate rotatably connected to the bottom end of the adjusting screw via a bearing.

[0007] As a further description of the above technical solution: an elastic anti-slip pad layer is fixedly connected to the bottom of the abutment, and the elastic anti-slip pad layer is made of nitrile rubber.

[0008] As a further description of the above technical solution: the bottom of the L-shaped frame is provided with a slot, the L-shaped frame is provided with a lock hole, and the top of the fixed base is fixedly connected with a plug that matches the slot, and the plug is provided with a through hole.

[0009] As a further description of the above technical solution: the locking assembly includes an outer cylinder fixed to one side of the L-shaped frame, a pull rod inserted into one side of the outer cylinder, a slider fixedly connected to one end of the pull rod, a spring sleeved on one end of the pull rod located in the outer cylinder, and a locking rod adapted to the through hole fixedly connected to one end of the slider.

[0010] As a further description of the above technical solution: the through hole and the lock hole have the same diameter, and their centers are on the same axis.

[0011] As a further description of the above technical solution: the semi-circular scale is a protractor with an accuracy of 1°.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: This utility model has a simple structure, is easy to operate, and has high measurement accuracy. It can measure the tilt angle of anchor rods in both the vertical and horizontal directions. At the same time, it is convenient to measure the angle of anchor rods of different diameters, making it highly practical. Furthermore, the modular structure of the semi-circular scale, L-shaped frame, and gravity hammer makes it easy to assemble, disassemble, store, carry, and maintain. Attached Figure Description

[0013] Figure 1 An overall schematic diagram according to an embodiment of the present utility model is shown; Figure 2 A schematic diagram of the internal cross-section of an L-shaped frame according to an embodiment of the present invention is shown; Figure 3 It shows Figure 2 Enlarged view of point A in the middle; Figure 4 A schematic diagram of the internal structure of the L-shaped frame and outer cylinder according to an embodiment of the present invention is shown. Figure 5 A schematic diagram showing the inclination angle of an anchor rod in the vertical direction according to the present invention is shown; Figure 6 A schematic diagram showing the horizontal tilt angle of an anchor rod according to the present invention is provided.

[0014] Legend: 1. Semicircular scale; 2. L-shaped frame; 3. Locking and positioning assembly; 31. Adjusting screw; 32. Adjusting knob; 33. Bearing; 34. Support plate; 35. Elastic anti-slip pad; 4. Blind hole; 5. Locking assembly; 51. Outer cylinder; 52. Pull rod; 53. Spring; 54. Slider; 55. Locking rod; 6. Fixing base; 7. Rope; 8. Gravity hammer; 9. Elastic rubber sleeve; 10. Fixing rod; 11. Annular stop block; 12. Insert block; 13. Slot; 14. Through hole; 15. Lock hole. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] Reference Figures 1-6 This embodiment provides a coal mine roadway support anchor bolt angle measuring device, including a semi-circular scale 1, which is a protractor with an accuracy of 1°. A fixed base 6 is provided on the top of the semi-circular scale 1. A locking and positioning component 3 is provided on the L-shaped frame 2, and the locking and positioning component 3 is located at the blind hole 4. A locking component 5 is provided on one side of the L-shaped frame 2. A rope 7 is provided on the front of the semi-circular scale 1. A gravity hammer 8 is fixedly connected to the bottom end of the rope 7. A fixed rod 10 is fixedly connected to the fixed base 6. An annular stop block 11 is fixedly connected to one end of the fixed rod 10. An elastic rubber sleeve 9 is fixedly connected to the top of the rope 7 and sleeved on the fixed rod 10.

[0017] Specifically, when measuring the inclination angle of the anchor bolts on the roof of the roadway support, the device sequentially connects the semi-circular scale 1 to the L-shaped frame 2, and then installs the gravity hammer 8, as follows: Figure 5 As shown, first insert one end of the anchor rod into the blind hole 4 in the vertical direction of the L-shaped frame 2, then tighten the adjusting knob 32 to move the support plate 34 down to clamp the anchor rod, ensuring the stability of the anchor rod to be measured. This method is convenient to operate and easy to fix anchor rods of different diameters and sizes, offering strong applicability and stable measurement without hand-held shaking. During measurement, the scale on the semi-circular ruler 1 corresponding to the rope 7 when the gravity hammer 8 stops swinging represents the vertical inclination angle of the anchor rod to be measured. When measuring the inclination angle of the anchor rod on the roadway support wall, as shown... Figure 6As shown, first insert one end of the anchor rod into the blind hole 4 in the underwater direction of the L-shaped frame 2, and then tighten the adjusting knob 32 to ensure the stability of the anchor rod to be tested. When the gravity hammer 8 stops swinging, the scale on the semi-circular scale 1 corresponding to the rope 7 is the tilt angle of the anchor rod in the horizontal direction. It can measure both the vertical tilt angle and the horizontal tilt angle of the anchor rod, making it highly applicable.

[0018] Furthermore, the locking and positioning assembly 3 includes an adjusting screw 31 threadedly connected to the L-shaped frame 2. An adjusting knob 32 is fixedly connected to the top of the adjusting screw 31, and a backing plate 34 is rotatably connected to the bottom of the adjusting screw 31 via a bearing. An elastic anti-slip pad 35 is fixedly connected to the bottom of the backing plate 34, and the elastic anti-slip pad 35 is made of nitrile rubber.

[0019] Specifically, the elastic anti-slip pad 35 has good elastic deformation capability and wear resistance. When the abutment plate 34 is tightened by adjusting the screw 31, the elastic anti-slip pad 35 can buffer the abutment force through its own deformation, enhance the abutment stability, protect the anchor rod and the device, and ensure measurement accuracy. During measurement, simply turn the adjusting knob 32, which will drive the adjusting screw 31 to move down, thereby driving the abutment plate 34 to move down and fix the anchor rod, making the measuring device more secure and thus achieving stable measurement without hand shaking, which is quite practical.

[0020] Furthermore, the bottom of the L-shaped frame 2 is provided with a slot 13, and the L-shaped frame 2 is provided with a lock hole 15. The top of the fixed base 6 is fixedly connected with a plug 12 that is compatible with the slot 13. The plug 12 is provided with a through hole 14. The locking assembly 5 includes an outer cylinder 51 fixed to one side of the L-shaped frame 2. A pull rod 52 is inserted into one side of the outer cylinder 51. A slider 54 is fixedly connected to one end of the pull rod 52. A spring 53 is sleeved on one end of the pull rod 52 located in the outer cylinder 51. A locking rod 55 that is compatible with the through hole 14 is fixedly connected to one end of the slider 54. The diameter of the through hole 14 and the lock hole 15 are the same, and their centers are on the same axis.

[0021] Specifically, after measurement, the elastic rubber sleeve 9 can be removed to remove the gravity hammer 8. Because the outer end of the annular stop 11 is rounded, the elastic rubber sleeve 9 has a certain elastic force, allowing it to pass smoothly through the annular stop 11 and fit onto the fixed rod 10. This makes disassembly and assembly convenient. Then, pull the pull rod 52 outward. The pull rod 52 drives the slider 54 to move outward and compress the spring 53, thereby driving the locking rod 55 to move outward and disengage from the through hole 14, thus releasing the lock on the insert 12. Simply pull the L-shaped bracket 2 upward to remove the semi-circular scale 1. Conversely, during installation, simply align the insert 12 with the slot 13 and insert it. Release the pull rod 52. Under the rebound force of the spring 53, the locking rod 55 will be pushed into the through hole 14 until it is inserted into the lock hole 15, thus completing the installation of the semi-circular scale 1 and the L-shaped bracket 2. This makes it easy to store and carry while facilitating maintenance and use.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A coal mine roadway support anchor angle measuring device, characterized in that, The device includes a semi-circular scale (1), a fixed base (6) on the top of the semi-circular scale (1), an L-shaped frame (2) on the top of the fixed base (6), blind holes (4) at both ends of the L-shaped frame (2), a locking and positioning component (3) on the side of the L-shaped frame (2) near the blind hole (4), a locking component (5) on one side of the L-shaped frame (2), a rope (7) on the front of the semi-circular scale (1), a gravity hammer (8) fixedly connected to the bottom end of the rope (7), a fixed rod (10) fixedly connected to the fixed base (6), an annular stop block (11) fixedly connected to one end of the fixed rod (10), and an elastic rubber sleeve (9) fitted on the fixed rod (10) fixedly connected to the top end of the rope (7).

2. A coal mine roadway bolting angle measuring device according to claim 1, characterised in that, The locking and positioning assembly (3) includes an adjusting screw (31) threaded onto an L-shaped frame (2), an adjusting knob (32) fixedly connected to the top of the adjusting screw (31), and a stop plate (34) rotatably connected to the bottom of the adjusting screw (31) via a bearing.

3. A coal mine roadway bolting angle measuring device according to claim 2, characterised in that, The bottom of the abutment (34) is fixedly connected to an elastic anti-slip pad (35), and the elastic anti-slip pad (35) is made of nitrile rubber.

4. The coal mine roadway support anchor angle measuring device according to claim 1, characterized in that, The L-shaped frame (2) has a slot (13) at the bottom and a lock hole (15) inside. The top of the fixed base (6) is fixedly connected to a plug (12) that is compatible with the slot (13) and a through hole (14) is provided on the plug (12).

5. A coal mine roadway bolting angle measuring device according to claim 4, characterised in that, The locking assembly (5) includes an outer cylinder (51) fixed to one side of the L-shaped frame (2), a pull rod (52) inserted into one side of the outer cylinder (51), a slider (54) fixedly connected to one end of the pull rod (52), a spring (53) sleeved on one end of the pull rod (52) located in the outer cylinder (51), and a locking rod (55) adapted to the through hole (14) fixedly connected to one end of the slider (54).

6. A coal mine roadway bolting angle measuring device according to claim 5, characterised in that, The through hole (14) and the lock hole (15) have the same diameter and their centers are on the same axis.

7. A coal mine roadway bolting angle measuring device according to claim 1, characterised in that, The semi-circular ruler (1) is a protractor with an accuracy of 1°.

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