Coal mine surface collapse depth measuring device

Abstract

The utility model relates to the technical field of depth measurement, in particular to a coal mine surface collapse depth measuring device which comprises a bottom plate, pulleys are fixedly connected to the four corners of the lower end of the bottom plate, first threaded holes which are vertically through are formed in the left portion and the right portion of the upper end of the bottom plate, and screws are in threaded connection in the two first threaded holes. The upper ends of the two screw rods are fixedly connected with handles, the lower ends of the two screw rods are in threaded connection with insertion columns, a first telescopic rod is fixedly connected to the middle of the upper end of the bottom plate, the upper end of the first telescopic rod is movably sleeved with a second telescopic rod, and three second threaded holes are formed in the outer surface of the first telescopic rod. According to the coal mine surface collapse depth measuring device, the two first threaded holes are formed in the upper end of the bottom plate, so that the stability of the coal mine surface collapse depth measuring device can be conveniently and rapidly achieved, and the situation that in the working process, the measuring result is caused by side face or other unstable factors of the device is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of depth measurement, in particular to a device for measuring the depth of surface subsidence in a coal mine. Background Art

[0002] Coal mines are areas where humans mine coal resources in coal-rich mining areas. They are generally divided into underground coal mines and open-pit coal mines. When the coal seam is far from the surface, it is generally chosen to dig tunnels underground to mine coal. This is an underground coal mine. When the coal seam is very close to the surface, it is generally chosen to directly strip the surface soil layer to mine coal. This is an open-pit coal mine. The vast majority of coal mines in my country are underground coal mines. The scope of coal mines includes a large area above and below the ground and related facilities. Coal mines are reasonable spaces excavated by humans when digging geological layers rich in coal. They usually include tunnels, shafts, and mining faces. During the coal mining process, cracks will appear in the mining surface subsidence area. In order to ensure the safety of the operation, the cracks need to be measured. During the measurement, professional coal mining surface subsidence area crack measurement devices are required.

[0003] However, the existing coal mine surface measuring devices still have the following shortcomings: when measuring the coal mine surface, the measuring device needs to be transported to the work site, and then pushed to the measuring point to work, but the existing measuring device does not have a height adjustment function, and a suitable vehicle model is required for transportation during transportation, which takes up more space, and the device needs to be manually supported or pressed by objects during work to prevent the device from sliding sideways, and there is no anti-slip structure; therefore, we propose a coal mine surface subsidence depth measuring device. Utility Model Content

[0004] The main purpose of the utility model is to provide a device for measuring the depth of coal mine surface subsidence, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A coal mine surface subsidence depth measuring device comprises a bottom plate, pulleys are fixedly connected at the four corners of the lower end of the bottom plate, first threaded holes are opened at the upper left and upper right parts of the bottom plate, screws are threadedly connected in two of the first threaded holes, handles are fixedly connected at the upper ends of the two screws, and plugs are threadedly connected at the lower ends of the two screws, a first telescopic rod is fixedly connected to the middle part of the upper end of the bottom plate, a second telescopic rod is movably sleeved at the upper end of the first telescopic rod, three second threaded holes are opened on the outer surface of the first telescopic rod, a bolt is threadedly connected in one of the second threaded holes, and the The outer side surface of the bolt is fixedly connected to a rotating block, the upper end of the second telescopic rod is fixedly connected to a limit frame, the rear end of the limit frame is fixedly connected to a first rotating motor, the output end of the first rotating motor is fixedly connected to a gear, the outer surface of the gear is meshingly connected to a movable plate, the front and rear ends of the movable plate are fixedly connected to side plates, the front end of the front side side is fixedly connected to the second rotating motor, the output end of the second rotating motor is fixedly connected to a retractor, the outer surface of the retractor is movably connected to a scale rope, the other end of the scale rope is fixedly connected to a gravity block, and a pressure sensor is installed at the lower end of the gravity block.

[0007] Preferably, the three second threaded holes are all linearly opened on the outer surface of the first telescopic rod.

[0008] Preferably, a square groove having the same diameter as the movable plate is provided inside the limiting frame.

[0009] Preferably, the front end of the gear is movably connected to the front inner wall surface of the limiting frame through a bearing.

[0010] Preferably, the front end of the retractor is movably connected to the front end of the rear side plate via a bearing.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. In the utility model, by setting two first threaded holes on the upper end of the bottom plate, after pushing the equipment to the work site, if the site is a muddy ground, the plug column is threadedly connected to the outer surface of the screw rod, and the plug column is tightly inserted into the ground. If it is a flat surface, the plug column is directly removed and the flat base is installed to achieve stability. Through this setting, the stability of the utility model can be achieved conveniently and quickly to prevent the device from being sideways or other unstable factors from causing measurement results during the working process.

[0013] 2. In the utility model, the second telescopic rod is movably sleeved in the first telescopic rod, and the height of the second telescopic rod is adjusted by aligning the bolt in the appropriate second threaded hole and rotating the rotating block so that the bolt thread is rotated and connected to the first telescopic rod until it tightly abuts against the outer surface of the second telescopic rod. This can complete the limiting fixation of the second telescopic rod. When the device is transported, the height of the device can be lowered by this method for easy transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a coal mine surface subsidence depth measuring device of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the bottom plate connection and splitting of a coal mine surface subsidence depth measuring device according to the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the first telescopic rod and the second telescopic rod of a coal mine surface subsidence depth measuring device of the utility model being connected and separated;

[0017] Figure 4 The utility model is a schematic structural diagram of a limit frame cutaway of a coal mine surface subsidence depth measuring device.

[0018] In the figure: 1. bottom plate; 2. pulley; 3. first threaded hole; 4. screw; 5. handle; 6. plug post; 7. first telescopic rod; 8. second telescopic rod; 9. second threaded hole; 10. bolt; 11. rotating block; 12. limit frame; 13. first rotating motor; 14. gear; 15. movable plate; 16. side plate; 17. second rotating motor; 18. retractor; 19. scale rope; 20. gravity block; 21. pressure sensor. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] See also Figure 1-4 , the utility model provides a technical solution:

[0023] A coal mine surface subsidence depth measuring device, comprising a bottom plate 1, pulleys 2 are fixedly connected at the four corners of the lower end of the bottom plate 1, first threaded holes 3 that pass through the upper left and upper right parts of the bottom plate 1 are provided, screws 4 are threadedly connected in the two first threaded holes 3, handles 5 are fixedly connected at the upper ends of the two screws 4, and plug posts 6 are threadedly connected at the lower ends of the two screws 4, a first telescopic rod 7 is fixedly connected to the middle part of the upper end of the bottom plate 1, a second telescopic rod 8 is movably sleeved at the upper end of the first telescopic rod 7, and three second threaded holes 9 are provided on the outer surface of the first telescopic rod 7, a bolt 10 is threadedly connected in one of the second threaded holes 9, and the outer side of the bolt 10 is fixedly connected to the A rotating block 11 is connected, the upper end of the second telescopic rod 8 is fixedly connected to a limit frame 12, the rear end of the limit frame 12 is fixedly connected to a first rotating motor 13, the output end of the first rotating motor 13 is fixedly connected to a gear 14, the outer surface of the gear 14 is meshingly connected to a movable plate 15, the front and rear ends of the movable plate 15 are fixedly connected to side plates 16, the front end of the front side plate 16 is fixedly connected to a second rotating motor 17, the output end of the second rotating motor 17 is fixedly connected to a retractor 18, the outer surface of the retractor 18 is movably connected to a scale rope 19, the other end of the scale rope 19 is fixedly connected to a gravity block 20, and a pressure sensor 21 is installed at the lower end of the gravity block 20.

[0024] In this embodiment, the three second threaded holes 9 are all linearly opened on the outer surface of the first telescopic rod 7. By aligning the bolt 10 with the appropriate second threaded hole 9 and rotating the rotating block 11, the bolt 10 is threadedly rotated and connected to the first telescopic rod 7 until it is tightly against the outer surface of the second telescopic rod 8, and the second telescopic rod 8 can be limited and fixed. When the device is transported, the height of the device can be lowered by this method for easy transportation; a square groove with the same diameter as the movable plate 15 is provided inside the limit frame 12; the front end of the gear 14 is movably connected to the front inner wall surface of the limit frame 12 through a bearing, and the first rotating motor 13 is turned on to make the gear 14 rotate and engage in the tooth groove of the movable plate 15, so that the movable plate 15 can be engaged and moved to the left to a suitable detection point; the front end of the retractor 18 is movably connected to the front end of the rear side plate 16 through a bearing.

[0025] It should be noted that the utility model is a device for measuring the depth of surface subsidence in a coal mine. In the specific use process, the utility model is transported to the working point, and the second telescopic rod 8 is movably sleeved in the first telescopic rod 7 by setting the second telescopic rod 8 to adjust the height. By aligning the bolt 10 with the appropriate second threaded hole 9 and rotating the rotating block 11, the bolt 10 is threadedly connected to the first telescopic rod 7 until it is tightly against the outer surface of the second telescopic rod 8. The second telescopic rod 8 can be fixed in a limited position. When the device is transported, the height of the device can be lowered by this method for easy transportation. Then, through the two first threaded holes 3 provided at the upper end of the base plate 1, the device is pushed to the working site. If the site is a muddy ground, the plug column 6 is threadedly connected to the outer surface of the screw rod 4, and the plug column is tightly inserted into the ground. If it is a flat surface, the plug column 6 is directly removed and the flat base is installed (see the accompanying drawings). Not shown) can achieve stability. Through this setting, the stability of the new type of device can be easily and quickly achieved to prevent the device from being unstable due to side or other unstable factors during the working process, and then turn on the first rotary motor 13 to rotate the gear 14 and engage it in the tooth groove of the movable plate 15, so that the movable plate 15 engages and moves to the left to a suitable detection point, and then turn on the second rotary motor 17. The scale rope 19 moves downward on the outer surface of the reel 18 and moves vertically downward under the gravity of the gravity block 20. When the gravity block 20 drops to the bottom of the collapse, it squeezes the pressure sensor 21 at the bottom of the gravity block 20, and the second rotary motor 17 is turned off through the pressure sensor 21, thereby stopping the gravity block 20 from falling, and observing the value on the scale line again to determine the depth of the collapse, thereby achieving the purpose of automatically stopping the gravity block 20 from falling and improving the measurement accuracy.

[0026] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A device for measuring the depth of coal mine surface subsidence, comprising a bottom plate (1), characterized in that: The four corners of the lower end of the base plate (1) are fixedly connected with pulleys (2); the upper left part and the upper right part of the base plate (1) are provided with first threaded holes (3) passing through from top to bottom; the two first threaded holes (3) are threadedly connected with screw rods (4); the upper ends of the two screw rods (4) are fixedly connected with handles (5); the lower ends of the two screw rods (4) are threadedly connected with plug posts (6); the middle part of the upper end of the base plate (1) is fixedly connected with a first telescopic rod (7); the upper end of the first telescopic rod (7) is movably sleeved with a second telescopic rod (8); the outer surface of the first telescopic rod (7) is provided with three second threaded holes (9); one of the second threaded holes (9) is threadedly connected with a bolt (10); the outer side surface of the bolt (10) is fixedly connected with a rotating block (11); the first The upper ends of the two telescopic rods (8) are fixedly connected to a limit frame (12), the rear end of the limit frame (12) is fixedly connected to a first rotating motor (13), the output end of the first rotating motor (13) is fixedly connected to a gear (14), the outer surface of the gear (14) is meshingly connected to a movable plate (15), the front and rear ends of the movable plate (15) are fixedly connected to a side plate (16), the front end of the front side side plate (16) is fixedly connected to a second rotating motor (17), the output end of the second rotating motor (17) is fixedly connected to a retractor (18), the outer surface of the retractor (18) is movably connected to a scale rope (19), the other end of the scale rope (19) is fixedly connected to a gravity block (20), and a pressure sensor (21) is installed at the lower end of the gravity block (20).

2. A coal mine surface subsidence depth measuring device according to claim 1, characterized in that: The three second threaded holes (9) are all linearly opened on the outer surface of the first telescopic rod (7).

3. A coal mine surface subsidence depth measuring device according to claim 1, characterized in that: A square groove having the same diameter as that of the movable plate (15) is arranged inside the limiting frame (12).

4. A coal mine surface subsidence depth measuring device according to claim 1, characterized in that: The front end of the gear (14) is movably connected to the front inner wall surface of the limiting frame (12) via a bearing.

5. A coal mine surface subsidence depth measuring device according to claim 1, characterized in that: The front end of the retractor (18) is movably connected to the front end of the rear side plate (16) via a bearing.

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