A borehole depth measuring device for mining blasting

Abstract

The utility model discloses a kind of blast hole depth measuring devices for mining blasting, including measuring tube, scale is provided on measuring tube, a plurality of measuring tubes are detachably connected by thread, its connection forms measuring rod, measuring tube is inserted into sending pipe cylinder, sending pipe cylinder is provided with screw rod assembly, sending pipe cylinder is also provided with sending rod assembly on screw rod assembly, sending pipe cylinder is slidably connected with receiving plate, receiving plate pushes measuring tube into sending pipe cylinder and drives screw rod assembly and sending rod assembly;The utility model sets up sending pipe cylinder, integrates sending pipe, butt joint screw pipe, stretches into blast hole measurement integration, a large number of manpower is saved, and labor intensity is reduced, and the movement of receiving plate controls the movement of screw rod assembly and sending rod assembly, effectively avoids the interference of both, ensure that measuring tube is connected in measuring rod after then carries out stretching into blast hole, simultaneously can also realize automatic disassembly measuring tube. And measuring tube cannot be obscured by smoke and dust water flow, also can be measured to any direction, solve the defects of laser and heavy hammer.

Description

Technical Field

[0001] This utility model relates to the field of coal mining, specifically a device for measuring the depth of blast holes used in mining blasting. Background Technology

[0002] In mining engineering, the accurate measurement of borehole depth directly affects blasting effectiveness and construction safety. Traditional methods using measuring ropes and weights rely on operator experience to determine if the weight has reached the bottom. In deep or inclined holes, this is prone to misjudgment due to swaying, making it difficult to guarantee measurement accuracy. Furthermore, for inclined or angled boreholes, the weight cannot adhere to the bottom due to gravity, and the plumb line can easily become stuck due to friction with the hole wall, making it impossible to obtain effective data. To improve efficiency, some technologies use laser rangefinders to replace manual operation. These devices typically place the laser rangefinder inside a mounting tube and calculate the depth by emitting a laser beam to the bottom of the hole's reflective surface. However, rock debris accumulation, water seepage into the borehole wall, or borehole curvature can all obstruct the laser path, causing signal attenuation or reflection failure, resulting in measurement results significantly deviating from the true value. Currently, the mainstream manual measurement method requires splicing multiple measuring tubes together and inserting them into the bottom of the borehole. This process requires multiple operators, resulting in high labor intensity and long processing times. Therefore, there is an urgent need for a borehole depth measurement solution that is resistant to obstruction, multi-directionally adaptive, and easy to operate. Utility Model Content

[0003] The purpose of this invention is to provide a borehole depth measuring device for mining blasting, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a borehole depth measuring device for mining blasting, comprising a measuring tube with graduations, multiple measuring tubes being detachably connected by threads to form a measuring rod, the measuring tube being inserted into a delivery tube, the delivery tube being provided with a screwing rod assembly capable of driving the measuring tube to rotate around its own axis, the screwing rod assembly being further provided with a delivery rod assembly that drives the measuring rod forward, the delivery tube being slidably connected to a receiving plate, the receiving plate pushing the measuring tube into the delivery tube and driving the screwing rod assembly and the delivery rod assembly, so that during the delivery rod measurement process, the receiving plate first rises to drive the screwing rod assembly to thread the measuring tube to the end of the measuring rod, and during the descent of the receiving plate, it drives the delivery rod assembly to transport the measuring rod forward, thereby achieving borehole depth measurement by counting the measuring tubes;

[0005] Two guide rods and a feed rod screw are fixedly connected to the receiving plate. Each guide rod is slidably connected to an L-rod, one end of which can extend out of the guide rod.

[0006] The screwing rod assembly includes several screwing wheels, which are driven by a screwing rod rack. The screwing rod rack is provided with a rack guide block that can be moved by the L rod.

[0007] The rod feeding assembly includes multiple tube feeding wheels, which are driven by an embedded rack. The embedded rack is provided with a rack guide block that can be moved by the L rod.

[0008] Preferably, the tube feed cylinder is symmetrically provided with two support legs, one end of an inner slide rod is slidably connected to the support leg, the inner slide rod is threadedly connected to the support leg screw, the support leg screw is rotatably connected to the support leg, and the support leg screw is driven by a motor.

[0009] Preferably, an angle limiting component is provided between the feeding tube and the support leg. The angle limiting component includes a rotating shaft and a rotating sleeve. Two rotating shafts are symmetrically fixedly connected in the middle of the feeding tube. The rotating shafts are always rotatably connected in the rotating sleeve. The rotating sleeve is fixedly connected to the inner slide rod. The rotating shaft is provided with a plurality of rotating shaft insertion holes. The rotating sleeve is provided with a slot in which a sleeve insertion rod is slidably connected. One end of a spring is fixedly connected to the upper end of the sleeve insertion rod. The other end of the spring is fixedly connected to the rotating sleeve. The spring causes the sleeve insertion rod to always be inserted inward, and the sleeve insertion rod can be inserted into the rotating shaft insertion hole.

[0010] Preferably, the feed rod screw is threadedly connected to a gear nut, the gear nut meshes with a drive gear, the drive gear is driven by a motor, the gear nut and the drive gear are rotatably connected in the feed tube, and the guide rod and the feed rod screw are slidably connected in the feed tube.

[0011] Preferably, a T-rod is slidably connected in the receiving plate, and a spring is provided between the T-rod and the receiving plate to make the T-rod tend to be stationary in the center. The T-rod can push the L-rod to slide, and the lower end of the L-rod extends into the receiving plate. A spring is provided between the L-rod and the receiving plate.

[0012] Preferably, a U-rod is symmetrically arranged on both sides of the T-rod, with both ends of the U-rod hinged to the receiving plate. The T-rod is provided with a groove for accommodating the U-rod, so that the U-rod can be sleeved on the T-rod, making the T-rod stable on one side of the receiving plate.

[0013] Preferably, a worm gear is fixedly connected to the lower end of the screwing wheel at the corresponding position of the two guide rods. The worm gear meshes with the worm. The worm is fixedly connected to the screwing gear. The screwing gear meshes with the screwing rack. The screwing wheel, worm gear, worm, and screwing gear are rotatably connected in the pipe feeding cylinder. The screwing rack is slidably connected in the pipe feeding cylinder. A spring is provided between the screwing rack and the pipe feeding cylinder.

[0014] Preferably, the feeding wheel is coaxially fixed with an embedded gear at the corresponding position of the two guide rods. The embedded gear meshes with an embedded rack. The feeding wheel and the embedded gear are rotatably connected in the feeding cylinder. The embedded rack is slidably connected in the feeding cylinder. A spring is provided between the embedded rack and the feeding cylinder.

[0015] Preferably, the tube feeding wheel is also coaxially fixedly connected to a limiting disc, which has several teeth that engage with the limiting disc to prevent the tube feeding wheel from rotating when not driven by the embedded rack. The limiting disc is rotatably connected in the tube feeding cylinder, and the limiting disc is slidably connected in the tube feeding cylinder. A spring is provided between the limiting disc and the tube feeding cylinder.

[0016] Preferably, one end of the rack guide block is slidably connected to a guide block retractor, the guide block retractor is provided with an inclined surface, a spring is provided between the rack guide block and the guide block retractor, the guide block retractor is moved by an L rod, the other end of the rack guide block is fixedly connected to a guide block slider, the guide block slider is slidably connected in a guide groove, a guide block baffle is fixedly connected to the outside of the rack guide block, one end of the spring is fixedly connected to the guide block baffle, and the spring always pushes the rack guide block to extend in the direction of the guide groove;

[0017] The guide groove consists of an arc section and a line section. The arc section has a deep trajectory, while the line section has a shallow trajectory. When the rack guide block is in the line section, the guide block retracts and extends out of the screw rod rack and the embedded rack. When it is in the arc section, the rack guide block moves and the guide block retracts and disappears into the screw rod rack and the embedded rack.

[0018] Compared with existing technologies, the advantages of this invention are as follows: This invention features a tube delivery cylinder that integrates tube delivery, tube connection and tightening, and borehole measurement, significantly saving manpower and reducing labor intensity. Furthermore, the movement of the receiving plate controls the movement of the tightening rod assembly and the delivery rod assembly, effectively preventing interference between them and ensuring that the measuring tube is connected to the measuring rod before being inserted into the borehole. It also enables automatic disassembly of the measuring tube. Moreover, the measuring tube is not obstructed by smoke, dust, or water flow, and can measure in any direction, overcoming the shortcomings of laser and counterweight methods. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0020] Figure 2 for Figure 1 A magnified view of a portion at point A;

[0021] Figure 3 This is a schematic diagram of the structure of this utility model with the support legs removed;

[0022] Figure 4 for Figure 3 A magnified view of a portion at point B;

[0023] Figure 5 for Figure 3 A magnified view of a portion at point E;

[0024] Figure 6 This is a schematic diagram of the screw-tightening assembly and the screw-feeding assembly of this utility model;

[0025] Figure 7 for Figure 6 A magnified view of a portion at point C;

[0026] Figure 8 for Figure 6 A magnified view of a portion at point D;

[0027] Figure 9 This is a schematic diagram of the rack guide block of this utility model;

[0028] Figure 10 This is a schematic diagram of the internal structure of the rack guide block of this utility model;

[0029] Figure 11 This is a schematic diagram of the structure of the turntable of this utility model;

[0030] Figure 12 This is a schematic diagram of the measuring tube of this utility model;

[0031] Figure 13 This is a schematic diagram of the structure of the gear nut of this utility model;

[0032] Figure 14 This is a schematic diagram of the T-bar structure of this utility model;

[0033] Figure 15 This is a schematic diagram of the internal structure of the support leg of this utility model;

[0034] Figure 16 This is a schematic diagram of the guide groove of this utility model.

[0035] In the diagram: 1. Measuring tube; 101. Threaded head; 102. Threaded hole; 2. Feed tube sleeve; 201. Rotating shaft; 202. Rotating shaft insertion hole; 3. Support leg; 301. Inner sliding rod; 302. Support leg screw; 303. Rotating sleeve; 304. Sleeve insertion rod; 4. Receiving plate; 401. Guide rod; 402. Feed rod screw; 403. Gear nut; 404. Drive gear; 405. L-shaped rod. 406, T-bar; 407, U-bar; 5, pipe-tightening wheel; 501, worm gear; 502, worm; 503, pipe-tightening gear; 504, pipe-tightening rack; 6, pipe-feeding wheel; 601, embedded gear; 602, embedded rack; 7, limited turntable; 701, limited turn clip; 8, rack guide block; 801, guide block baffle; 802, guide block shrink block; 803, guide block slider; 804, guide groove. Detailed Implementation

[0036] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Please see Figure 1-16To address the drawbacks of requiring multiple people to collaborate in borehole depth measurement, which is labor-intensive and time-consuming, a pipe delivery tube 2 is introduced. This integrates pipe delivery, pipe connection and tightening, and borehole insertion for measurement, significantly saving manpower and reducing labor intensity. Furthermore, the movement of the tightening rod assembly and the delivery rod assembly is controlled by the movement of the receiving plate 4, effectively preventing interference between them. This ensures that the measuring tube 1 is connected to the measuring rod before being inserted into the borehole, and also allows for automatic disassembly of the measuring tube 1. Moreover, the measuring tube 1 is not obstructed by smoke, dust, or water flow, and can measure in any direction, overcoming the shortcomings of laser and weighted methods. This utility model provides a technical solution: a borehole depth measuring device for mining blasting, including a measuring tube 1 with a scale, a threaded head 101 at one end and a threaded hole 102 at the other end, two measuring tubes 1 being threadedly connected by the threaded head 101 and the threaded hole 102, and multiple measuring tubes 1 being detachably connected by threads to form a measuring rod, the measuring tube 1 being inserted into a feeding tube 2, the feeding tube 2 being provided with a screwing rod assembly capable of driving the measuring tube 1 to rotate around its own axis, the screwing rod assembly also being provided with a feeding rod assembly that drives the measuring rod forward, the feeding tube 2 being slidably connected to a receiving plate 4, the receiving plate 4 pushing the measuring tube 1 into the feeding tube 2 and driving the screwing rod assembly and the feeding rod assembly, so that the receiving plate 4... During the rod feeding measurement process, plate 4 first rises to drive the rod screwing assembly to thread the measuring tube 1 to the end of the measuring rod. As the receiving plate 4 descends, it drives the rod feeding assembly to advance the measuring rod. The borehole depth is measured by counting the measuring tubes 1. To facilitate the entry of the measuring tube 1 into the feeding tube cylinder 2, a chamfer is provided at the lower opening of the feeding tube cylinder 2. Magnets or other devices for uprighting the measuring tube 1, such as a limiting ring or barrel, can be installed on the receiving plate 4 to facilitate the feeding of the measuring tube 1. Two symmetrical support legs 3 are arranged on the outside of the feeding tube cylinder 2. One end of an inner sliding rod 301 is slidably connected to the support leg 3. The inner sliding rod 301 is threadedly connected to a support leg screw 302, which is rotatably connected to the support leg 3. The support leg screw 302 is driven by a motor. As needed, the motor of the support leg screw 302 is started, driving the support leg screw 302 to rotate. The support leg screw 302 then moves the inner sliding rod 301 to adjust the height. In this application, electrical components such as motors, cylinders, and push rods all use existing models.When measurement is required, adjust the angle and height of the feed tube 2 to align it with the borehole; move the T-rod 406 on the receiving plate 4 to one side, extending the L-rod 405 on that side; place the measuring tube 1 on the receiving plate 4, then start the motor corresponding to the feed rod screw 402. The receiving plate 4 rises, causing the measuring tube 1 to insert into the feed tube 2. When the measuring tube 1 is inserted into the screw assembly, the threaded end 101 of the measuring tube 1 is precisely inserted into the threaded hole 102 of the measuring rod. The L-rod 405 drives the screw rack 504 to move, and the screw rack... The 504 drive rod tightening assembly, which rotates the measuring tube 1 and connects it to the measuring rod. After connection, the receiving plate 4 continues to rise until it reaches its maximum rising distance. During this process, the receiving plate 4 pushes the measuring tube 1 upward as a whole, and the L-rod 405 passes over the rack guide block 8 on the embedded rack 602. At this time, the reverse motor reverses, and the receiving plate 4 begins to descend. The receiving plate 4 drives the L-rod 405 to move, and the L-rod 405 drives the rod delivery assembly to send the connected measuring rod into the borehole. The depth of the borehole is measured by counting. When the measurement is completed, the measuring rod needs to be removed. When the rod is being tightened, the T-rod 406 on the receiving plate 4 is moved to the other side, causing the L-rod 405 on that side to extend, while the L-rod 405 on the other side retracts under the action of the spring. The motor corresponding to the rod feeding screw 402 is then started, causing the receiving plate 4 to rise. The receiving plate 4 drives the L-rod 405 to move, and the L-rod 405 drives the rod feeding assembly to reverse, moving the connected measuring rod downwards. When the measuring tube 1 at the bottom of the measuring rod is inserted into the rod tightening assembly, the receiving plate 4 reaches its maximum rising distance. At this point, the motor is reversed, and the receiving plate 4 begins to descend, driving the rod tightening assembly to move the measuring tube... 1. The measuring tube 1 rotates and disengages from the measuring rod. After disengagement, the measuring tube 1 falls onto the receiving plate 4 and moves out of the feeding tube cylinder 2 along with the receiving plate 4. To facilitate the removal of the measuring tube 1, while the measuring tube 1 is still stuck in the screwing rod assembly after disengaging from the measuring rod, the receiving plate 4 can be raised again, causing the L-rod 405 to move a certain distance and drive the feeding rod assembly to reverse. This causes the measuring rod to push the measuring tube 1 out of the screwing rod assembly, at which point the measuring tube 1 falls onto the receiving plate 4. The receiving plate 4 can then be lowered again to remove the measuring tube 1. To ensure proper drive, the screwing rod rack 504 and the embedded rack 602 are in the same plane. The first measuring tube 1 can be pushed out by the following measuring tube 1, and the last measuring tube 1 can be pushed out manually or removed by rotating the feeding rod assembly in the forward direction.

[0038] To facilitate the coordination of pipe feeding, pipe connection and screwing, and borehole measurement, two guide rods 401 and a rod feeding screw 402 are fixedly connected to the receiving plate 4. Each guide rod 401 is slidably connected to an L-rod 405, one end of which can extend out of the guide rod 401. A T-rod 406 is slidably connected to the receiving plate 4. A spring is provided between the T-rod 406 and the receiving plate 4 to make the T-rod 406 tend to be stationary in the center. The T-rod 406 can push the L-rod 405 to slide. The lower end of the L-rod 405 extends into the receiving plate 4. A spring is provided between the L-rod 405 and the receiving plate 4. The spring causes the L-rod 405 to retract into the guide rod 401 when no force is applied. A U-rod 407 is symmetrically arranged on both sides of the T-rod 406. The two ends of the U-rod 407 are hinged to the receiving plate 4. The T-rod 406 is provided with a groove to accommodate the U-rod 407, so that the U-rod 407 can be sleeved on the T-rod 406, making the T-rod 406 stable on one side of the receiving plate 4. The feed rod screw 402 is threadedly connected to the gear nut 403. The gear nut 403 meshes with the drive gear 404, which is driven by a motor. The gear nut 403 and the drive gear 404 are rotatably connected in the feed tube 2. The guide rod 401 and the feed rod screw 402 are slidably connected in the feed tube 2. In use, move the T-bar 406 close to one side of the L-bar 405. After the movement is complete, place the corresponding U-bar 407 onto the T-bar 406. The U-bar 407 is engaged in the groove of the T-bar 406, thus limiting the movement of the T-bar 406. The T-bar 406 pushes the L-bar 405 horizontally, causing the L-bar 405 to extend out of the guide rod 401, so as to actuate the gear rack 504 and the rack guide block 8 of the embedded rack 602. Then, start the motor of the drive gear 404. The motor drives the drive gear 404 to rotate, which in turn drives the gear nut 403 to rotate. The rotation of the gear nut 403 causes the feed rod screw 402 to move vertically. Since the feed rod screw 402 is fixed on the receiving plate 4, it will not rotate with the gear nut 403. At this point, the measuring tube 1 can be fed or removed.

[0039] To facilitate connection to the measuring tube 1, a screwing rod assembly is provided. The screwing rod assembly includes several screwing wheels 5, which are driven by a screwing rod rack 504. The screwing rod rack 504 is provided with a rack guide block 8 that can be moved by the L rod 405. A worm gear 501 is fixedly connected to the lower end of the screwing wheels 5 at corresponding positions of the two guide rods 401. The worm gear 501 meshes with the worm 502. The worm 502 is fixedly connected to a screwing rod gear 503, which meshes with the screwing rod rack 504. The screwing wheels 5, worm gear 501, worm 502, and screwing rod gear 503 are rotatably connected in the tube delivery cylinder 2. The screwing rod rack 504 is slidably connected in the tube delivery cylinder 2. A spring is provided between the screwing rod rack 504 and the tube delivery cylinder 2. To facilitate the rotation of the measuring tube 1, the screwing wheel 5 can be covered with an anti-slip material, such as rubber or other elastically deformable material. To facilitate the upward transport of the measuring tube 1, a roller that can only rotate along the horizontal axis can be added to the screwing wheel 5; in other words, the roller can only move the measuring tube 1 vertically and cannot rotate it horizontally. To prevent jamming, the worm gear 501 and worm 502 are non-locking worm gears. When not in use, the screwing rod rack 504 does not mesh with the screwing rod gear 503 to prevent the two screwing rod racks 504 from interfering with each other. When installing the measuring tube 1, the L-rod 405 pushes... Figure 6 The right rack guide block 8 moves upward, driving the screw rod rack 504 to move. After moving upward a certain distance, the screw rod rack 504 meshes with the screw rod gear 503. The screw rod rack 504 continues to move upward, driving the screw rod gear 503 to rotate. The screw rod gear 503 drives the worm 502 to rotate, which in turn drives the worm wheel 501 to rotate. The worm wheel 501 drives the connected screwing wheel 5 to rotate, which in turn drives the measuring tube 1 to rotate. The other screwing wheels 5 assist the measuring tube 1 in rotating. At this time, the receiving plate 4 is still rising, causing the measuring tube 1 to rotate and rise simultaneously, thus connecting the measuring tube 1 to the lower end of the measuring rod. When disassembling the measuring tube 1, the L rod 405 pushes... Figure 6 The left rack guide block 8 moves down, driving the screw rod rack 504 to move. After moving down a certain distance, the screw rod rack 504 meshes with the screw rod gear 503. The screw rod rack 504 continues to move down, driving the screw rod gear 503 to rotate. The screw rod gear 503 drives the worm 502 to rotate, which in turn drives the worm wheel 501 to rotate. The worm wheel 501 drives the connected screwing tube wheel 5 to rotate in the opposite direction. The screwing tube wheel 5 drives the measuring tube 1 to rotate in the opposite direction. The other screwing tube wheels 5 assist the measuring tube 1 in rotating. At this time, the receiving plate 4 continues to descend, and the measuring tube 1 is now clamped in the screw rod assembly. When the receiving plate 4 rises again, the measuring tube 1 can be pushed out.

[0040] To facilitate the insertion of the measuring rod into the borehole, a rod feeding assembly is provided. The rod feeding assembly includes a feeding wheel 6, which is driven by an embedded rack 602. The embedded rack 602 is equipped with a rack guide block 8 that can be moved by the L-shaped rod 405. An embedded gear 601 is coaxially fixed to the feeding wheel 6 at corresponding positions of the two guide rods 401. The embedded gear 601 meshes with the embedded rack 602. The feeding wheel 6 is spindle-shaped to increase the contact area. To avoid interference, the size of the embedded gear 601 is smaller than that of the feeding wheel 6. The feeding wheel 6 and the embedded gear 601 are rotatably connected in the feeding cylinder 2, and the embedded rack 602 is slidably connected in the feeding cylinder 2. A spring is provided between the embedded rack 602 and the feeding cylinder 2. The tube feed wheel 6 is also coaxially fixedly connected to the limiting disc 7, which has several teeth that engage with the limiting clip 701 to prevent the tube feed wheel 6 from rotating when not driven by the embedded rack 602. The limiting disc 7 is rotatably connected to the tube feed cylinder 2, and the limiting clip 701 is slidably connected to the tube feed cylinder 2. A spring is provided between the limiting clip 701 and the tube feed cylinder 2. Due to the presence of the tube feed wheel 6, the measuring rod will not rotate with the measuring tube 1. When not in use, the embedded rack 602 does not mesh with the embedded gear 601 to prevent the two embedded racks 602 from interfering with each other. When installing the measuring tube 1, the L rod 405 drives... Figure 6 The right-side embedded rack 602 moves downward, engaging with the embedded gear 601. The rack continues to move downward, driving the embedded gear 601 to rotate. The gear 601 then drives the tube-feeding wheel 6 to rotate, which in turn drives the measuring rod upward. When the measuring tube 1 is disassembled, the L-rod 405... Figure 6 The left-side embedded rack 602 moves upward and engages with the embedded gear 601. The embedded rack 602 continues to move upward, driving the embedded gear 601 to rotate. The embedded gear 601 drives the tube feeding wheel 6 to rotate, and the tube feeding wheel 6 drives the measuring rod to move downward. During this process, the limiting turntable 7 will not rotate arbitrarily due to the action of the limiting card 701, thus preventing the tube feeding wheel 6 from rotating when it is not driven by the embedded rack 602.

[0041] To facilitate the measurement of boreholes at various angles, an angle limiting component is provided between the feed tube 2 and the support leg 3. The angle limiting component includes a rotating shaft 201 and a rotating sleeve 303. Two rotating shafts 201 are symmetrically fixedly connected in the middle of the feed tube 2. The rotating shafts 201 are always rotatably connected in the rotating sleeve 303. The rotating sleeve 303 is fixedly connected to the inner slide rod 301. Several rotating shaft insertion holes 202 are provided on the rotating shaft 201. A slot is provided on the rotating sleeve 303. A sleeve insertion rod 304 is slidably connected in the slot. One end of a spring is fixedly connected to the upper end of the sleeve insertion rod 304. The other end of the spring is fixedly connected to the rotating sleeve 303. The spring causes the sleeve insertion rod 304 to always be inserted inward, and the sleeve insertion rod 304 can be inserted into the rotating shaft insertion hole 202. When it is necessary to adjust the angle of the feeding tube 2, pull out the two sleeve rods 304 and then rotate the feeding tube 2. When it is rotated to the appropriate position, release the sleeve rods 304. Under the action of the spring, the sleeve rods 304 are inserted into the rotating shaft insertion hole 202, thus locking the angle of the feeding tube 2.

[0042] To drive the rack 504 and the embedded rack 602, a guide block 802 is slidably connected to one end of the rack guide block 8. The guide block 802 has an inclined surface. A spring is installed between the rack guide block 8 and the guide block 802. The guide block 802 is actuated by the L-rod 405. The other end of the rack guide block 8 is fixedly connected to a guide block slider 803, which slidably connects to the guide groove 804. A guide block baffle 801 is fixedly connected to the outside of the rack guide block 8. The end is fixedly connected to the guide block baffle 801. The spring always pushes the rack guide block 8 to extend in the direction of the guide groove 804. The guide groove 804 is composed of an arc and a line segment. The arc part has a deep trajectory, and the line segment part has a shallow trajectory. When the rack guide block 8 is in the line segment part, the guide block shrink block 802 extends out of the screw rod rack 504 and the embedded rack 602. When it is in the arc part, the rack guide block 8 moves so that the guide block shrink block 802 is submerged in the screw rod rack 504 and the embedded rack 602. In use, the rack guide block 8 is pushed by the L-bar 405. The rack guide block 8 drives the guide block slider 803 to slide in the line segment of the guide groove 804, thereby causing the screw rack 504 and the embedded rack 602 to drive their corresponding gears to rotate. After rotation, to prevent the screw rack 504 and the embedded rack 602 from driving their corresponding gears to reverse, the guide block slider 803 slides to the end of the line segment of the guide groove 804. The depth of this position is consistent with the depth of the arc-shaped part of the guide groove 804. Under the action of the spring connected to the guide block baffle 801, the rack guide block 8 retracts. The rack guide block 8 drives the guide block retraction block 802 to fully retract into the screw rack 504 and the embedded rack 602. At this time, due to the height difference, the guide block slider 803 can only move along... The arc-shaped portion of the guide groove 804 slides under the pull of the spring, thereby preventing the screw rod rack 504 and the embedded rack 602 from meshing with their corresponding racks, until the guide block slider 803 reaches the starting point of the line segment of the guide groove 804. The starting point of the line segment is provided with an inclined surface so that the guide block slider 803 can enter the line segment of the guide groove 804. Since the guide block slider 803 and the guide groove 804 are always slidably connected, it can slide in the guide groove 804. In order to prevent the screw rod rack 504 and the embedded rack 602 from moving in the opposite direction, the guide block shrink block 802 is provided with an inclined surface. When the L rod 405 moves in the opposite direction, the guide block shrink block 802 is pushed back into the rack guide block 8 through the inclined surface, thereby not affecting the movement of the L rod 405.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the depth of blast holes in mining blasting, comprising a measuring tube (1) having a scale on it, and multiple measuring tubes (1) being detachably connected by threads to form a measuring rod, characterized in that: The measuring tube (1) is inserted into the tube delivery cylinder (2). The tube delivery cylinder (2) is equipped with a screw rod assembly that can drive the measuring tube (1) to rotate around its own axis. The screw rod assembly is also equipped with a delivery rod assembly that drives the measuring rod forward. The tube delivery cylinder (2) is slidably connected to the receiving plate (4). The receiving plate (4) pushes the measuring tube (1) into the tube delivery cylinder (2) and drives the screw rod assembly and the delivery rod assembly. During the delivery rod measurement process, the receiving plate (4) first rises and drives the screw rod assembly to thread the measuring tube (1) to the end of the measuring rod. During the descent of the receiving plate (4), the delivery rod assembly is driven to deliver the measuring rod forward. The depth of the blast hole is measured by counting the measuring tubes (1). Two guide rods (401) and a rod feeding screw (402) are fixedly connected to the receiving plate (4). Each guide rod (401) is slidably connected to an L rod (405), and one end of the L rod (405) can extend out of the guide rod (401). The screwing rod assembly includes several screwing wheels (5), which are driven by screwing rod racks (504). The screwing rod racks (504) are provided with rack guide blocks (8) that can be moved by L rods (405). The rod feeding assembly includes multiple tube feeding wheels (6), which are driven by an embedded rack (602). The embedded rack (602) is provided with a rack guide block (8) that can be moved by the L rod (405).

2. The device for measuring the depth of blast holes in mining blasting according to claim 1, characterized in that: The tube feed cylinder (2) is symmetrically provided with two support legs (3). One end of the inner slide rod (301) is slidably connected in the support leg (3). The inner slide rod (301) is threadedly connected to the support leg screw (302). The support leg screw (302) is rotatably connected in the support leg (3). The support leg screw (302) is driven by a motor.

3. The device for measuring the depth of blast holes in mining blasting according to claim 1, characterized in that: An angle limiting component is provided between the tube delivery cylinder (2) and the support leg (3). The angle limiting component includes a rotating shaft (201) and a rotating sleeve (303). Two rotating shafts (201) are symmetrically fixedly connected in the middle of the tube delivery cylinder (2). The rotating shafts (201) are always rotatably connected in the rotating sleeve (303). The rotating sleeve (303) is fixedly connected to the inner slide rod (301). Several rotating shaft insertion holes (202) are provided on the rotating shaft (201). A slot is provided on the rotating sleeve (303). A sleeve insertion rod (304) is slidably connected in the slot. One end of a spring is fixedly connected to the upper end of the sleeve insertion rod (304). The other end of the spring is fixedly connected to the rotating sleeve (303). The spring causes the sleeve insertion rod (304) to always be inserted inward. The sleeve insertion rod (304) can be inserted into the rotating shaft insertion hole (202).

4. The device for measuring the depth of blast holes in mining blasting according to claim 1, characterized in that: The feed rod screw (402) is threadedly connected to the gear nut (403), the gear nut (403) meshes with the drive gear (404), the drive gear (404) is driven by a motor, the gear nut (403) and the drive gear (404) are rotatably connected in the feed tube (2), and the guide rod (401) and the feed rod screw (402) are slidably connected in the feed tube (2).

5. The device for measuring the depth of blast holes in mining blasting according to claim 1, characterized in that: The receiving plate (4) is slidably connected to a T-rod (406). A spring is provided between the T-rod (406) and the receiving plate (4) to make the T-rod (406) tend to be stationary in the center. The T-rod (406) can push the L-rod (405) to slide. The lower end of the L-rod (405) extends into the receiving plate (4). A spring is provided between the L-rod (405) and the receiving plate (4).

6. The device for measuring the depth of blast holes in mining blasting according to claim 5, characterized in that: A U-rod (407) is symmetrically arranged on both sides of the T-rod (406). The two ends of the U-rod (407) are hinged to the receiving plate (4). The T-rod (406) is provided with a groove for accommodating the U-rod (407). The U-rod (407) can be sleeved on the T-rod (406), so that the T-rod (406) is stable on one side of the receiving plate (4).

7. The device for measuring the depth of blast holes in mining blasting according to claim 1, characterized in that: Worm gears (501) are fixedly connected to the lower ends of the pipe-tightening wheel (5) at the corresponding positions of the two guide rods (401). The worm gears (501) mesh with the worm (502). The worm (502) is fixedly connected to the screw-in gear (503). The screw-in gear (503) meshes with the screw-in rack (504). The pipe-tightening wheel (5), worm gears (501), worm (502), and screw-in gear (503) are rotatably connected in the pipe-feeding cylinder (2). The screw-in rack (504) is slidably connected in the pipe-feeding cylinder (2). A spring is provided between the screw-in rack (504) and the pipe-feeding cylinder (2).

8. The device for measuring the depth of blast holes in mining blasting according to claim 1, characterized in that: The feed wheel (6) at the corresponding position of the two guide rods (401) is coaxially fixed with an embedded gear (601). The embedded gear (601) meshes with the embedded rack (602). The feed wheel (6) and the embedded gear (601) are rotatably connected in the feed tube (2). The embedded rack (602) is slidably connected in the feed tube (2). A spring is provided between the embedded rack (602) and the feed tube (2).

9. The device for measuring the depth of blast holes in mining blasting according to claim 1, characterized in that: The tube feeding wheel (6) is also coaxially fixedly connected to the limiting disc (7). The limiting disc (7) is provided with several teeth, which are engaged with the limiting clip (701) to prevent the tube feeding wheel (6) from rotating when it is not driven by the embedded rack (602). The limiting disc (7) is rotatably connected in the tube feeding cylinder (2), and the limiting clip (701) is slidably connected in the tube feeding cylinder (2). A spring is provided between the limiting clip (701) and the tube feeding cylinder (2).

10. A borehole depth measuring device for mining blasting according to claim 1, characterized in that: One end of the rack guide block (8) is slidably connected to a guide block shrink block (802), and an inclined surface is provided on the guide block shrink block (802). A spring is provided between the rack guide block (8) and the guide block shrink block (802). The guide block shrink block (802) is moved by the L rod (405). The other end of the rack guide block (8) is fixedly connected to a guide block slider (803), and the guide block slider (803) is slidably connected in the guide groove (804). The rack guide block (8) is fixedly connected to a guide block baffle (801), and one end of the spring is fixedly connected to the guide block baffle (801). The spring always pushes the rack guide block (8) to extend in the direction of the guide groove (804). The guide groove (804) consists of an arc and a line segment. The arc part has a deep trajectory, while the line segment part has a shallow trajectory. When the rack guide block (8) is in the line segment part, the guide block shrink block (802) extends out of the screw rod rack (504) and the embedded rack (602). When it is in the arc part, the rack guide block (8) moves so that the guide block shrink block (802) is submerged in the screw rod rack (504) and the embedded rack (602).

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