A drilling device with dust suppression function for prospecting engineering

Abstract

The present invention relates to the field of drilling technology, and in particular to a drilling device with dust suppression function for prospecting engineering. It comprises a mounting frame, the mounting frame is slidably connected with a driving device, a drill rod is arranged on the lower side of the driving device, a drill bit is threadedly connected to the lower side of the drill rod, a dust cover is fixedly connected to the lower side of the mounting frame, the drill rod is slidably connected with a first limiting block uniformly distributed circumferentially, a spring is arranged between the first limiting block and the drill rod, a first limiting groove uniformly distributed circumferentially is arranged on the side of the drill rod away from the first limiting block uniformly distributed circumferentially, and the first limiting grooves on other adjacent drill rods are limitedly matched with the adjacent first limiting blocks. The present invention limits other adjacent drill rods by the first limiting block, avoids metal fatigue caused by over-tightening of the threaded connection between two adjacent drill rods, thereby extending the service life of the drill rod and reducing drilling costs.

Description

Technical Field

[0001] The invention relates to the technical field of drilling, and in particular to a drilling device with dust suppression function for prospecting engineering. Background Art

[0002] A drilling device is a mechanical device used to drill holes under the earth's surface. It is widely used in geological exploration, mineral resource development, hydrogeological survey, building foundation construction, oil and gas extraction and other fields. The design and function of the drilling device vary according to its application purpose and drilling conditions, but usually include the following main components: a frame, a drive device, a drill rod and a drill bit. When the existing device is in use, the drill rod and the drill bit are connected, and then the drill rod is connected to the drive device. The drive device drives the drill rod to drive the drill bit to rotate for drilling. As the drilling depth gradually increases, the drill rods need to be connected one by one. The connection between the drill rods is mostly threaded. When the drill rods are connected, the new drill rod is driven to rotate by the drive device, so that the new drill rod is connected to the old drill rod. However, the resistance of the drill bit when drilling will be transmitted to the drill rod. When the drill bit drills into hard rock, the resistance it encounters increases, and the resistance of the drill rod also increases. At this time, the threaded connection between the two adjacent drill rods will be further tightened, which will cause metal fatigue at the thread of the drill rod and reduce the service life of the drill rod. Summary of the invention

[0003] In order to overcome the shortcoming that the existing drill rod will cause further tightening of the thread when in use, the present invention provides a drilling device with dust suppression function for prospecting engineering.

[0004] Technical solution: A drilling device with dust suppression function for prospecting projects, comprising a mounting frame, the mounting frame is provided with a driving device, a drill rod is provided on the lower side of the driving device, a drill bit is threadedly connected to the lower side of the drill rod, a dust cover is fixed to the lower side of the mounting frame, the drill rod is slidably connected to a first limit block evenly distributed circumferentially, a spring is provided between the first limit block and the drill rod, a first limit groove evenly distributed circumferentially is provided on the side of the drill rod away from the first limit block evenly distributed circumferentially, and the first limit grooves on other adjacent drill rods are limitedly matched with adjacent first limit blocks.

[0005] More preferably, the first limiting block and the first limiting groove are both provided with inclined surfaces, and the inclined surface of the first limiting groove is pressed and matched with the inclined surface of the first limiting block.

[0006] More preferably, a first sliding groove evenly distributed circumferentially is provided on one side of the drill rod close to the first limit block evenly distributed circumferentially, the first sliding groove is slidably connected with a sliding member, the sliding member is slidably connected to the drill rod, the sliding member penetrates the part of the drill rod located between the adjacent first sliding groove and the adjacent first limit block, a second limit block is fixedly connected to one side of the sliding member close to the adjacent first limit block, and the second limit block is limitedly matched with the adjacent first limit block.

[0007] More preferably, the drill rod is provided with a second sliding groove evenly distributed in the circumference, a first sliding rod is slidably connected in the second sliding groove, a spring is provided between the first sliding rod and the drill rod, the drill rod is provided with a third sliding groove evenly distributed in the circumference, a first sliding plate is slidably connected in the third sliding groove, the first sliding rod and the adjacent first sliding plate are jointly fixed with a second sliding rod, the second sliding rod is slidably connected to the drill rod, the third sliding groove is communicated with the adjacent first sliding groove, and both are filled with liquid.

[0008] More preferably, it also includes a third limit block evenly distributed circumferentially, the third limit blocks evenly distributed circumferentially are all slidably connected to the drill rod, springs are arranged between the third limit blocks evenly distributed circumferentially and the drill rod, a second limit groove is arranged on the side of the drill rod away from the third limit blocks evenly distributed circumferentially, and the third limit blocks evenly distributed circumferentially are all limitedly cooperated with the second limit grooves on other adjacent drill rods.

[0009] More preferably, a fourth sliding groove evenly distributed circumferentially is provided on one side of the drill rod close to the third limit block evenly distributed circumferentially, the fourth sliding groove is slidably connected with a third sliding rod, the third sliding rods evenly distributed circumferentially are commonly fixed with a limit member, the limit member is slidably connected to the drill rod, and a spring is provided between the two, and the third limit blocks evenly distributed circumferentially are all limitedly matched with the limit member.

[0010] More preferably, an air storage tank is provided on one side of the drill rod close to the circumferentially evenly distributed third sliding groove, the air storage tank is filled with gas, the drill rod is provided with circumferentially evenly distributed channels, and the circumferentially evenly distributed fourth sliding grooves are connected to the air storage tank through adjacent channels respectively.

[0011] More preferably, a fifth sliding groove evenly distributed circumferentially is provided on one side of the drill rod close to the air storage tank, a second sliding plate is slidably connected in the fifth sliding groove, a fourth sliding rod is fixedly connected to the second sliding plate, the fourth sliding rod is slidably connected to the drill rod, the fourth sliding rod cooperates with an adjacent channel plug, and the fourth sliding rod is provided with an annular groove.

[0012] More preferably, a sixth sliding groove evenly distributed circumferentially is provided on one side of the drill rod close to the first sliding rod evenly distributed circumferentially, a fifth sliding rod is slidably connected in the sixth sliding groove, a spring is provided between the fifth sliding rod and the drill rod, the second sliding groove, the fifth sliding groove and the sixth sliding groove are all filled with gas, and the second sliding groove and the adjacent sixth sliding groove are connected to the adjacent fifth sliding groove.

[0013] More preferably, the fifth sliding rod is fixedly connected to the sixth sliding rod, the sixth sliding rod is slidably connected to the drill rod, the diameters of the second sliding groove and the sixth sliding groove are equal, the diameters of the second sliding rod and the sixth sliding rod are equal, and the first sliding rod and the fifth sliding rod are respectively in the same position in adjacent second sliding grooves and adjacent sixth sliding grooves.

[0014] The beneficial effects of the present invention are as follows: the present invention limits other adjacent drill rods by means of the first limit block, thereby preventing the threaded connection between two adjacent drill rods from being too tight and causing metal fatigue, thereby extending the service life of the drill rod and reducing drilling costs. At the same time, the probability of the drill rod being damaged due to metal fatigue during use is reduced, thereby also reducing the maintenance time of the device and improving drilling efficiency. At the same time, the device shields the drilling point by means of a dust cover to prevent dust and gravel from flying around.

[0015] The first limiting grooves on the two mutually connected drill rods cooperate with the adjacent first limiting blocks to prevent the two drill rods from being separated when the threads are damaged, thereby preventing the drill rod below the damaged part from falling into the well after the threads are damaged.

[0016] When the first limit block and the first limit groove are damaged and the two drill pipes are separated, the third limit block is inserted into the second limit groove of the other adjacent drill pipe, thereby preventing the drill pipe below the damaged part from falling into the well, thereby reducing the loss caused by thread damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 It is a three-dimensional structural cross-sectional view of the drill rod and the drill bit of the present invention;

[0019] Figure 3 It is a three-dimensional structural cross-sectional view of the drill rod of the present invention;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the second sliding plate and the fourth sliding rod of the present invention;

[0021] Figure 5 An exploded view of the first limit block and the second limit block of the present invention;

[0022] Figure 6 It is an exploded view of the drill rod and the first limit block of the present invention.

[0023] Markings in the accompanying drawings: 1-mounting frame, 2-driving device, 3-drill rod, 31-first limiting groove, 32-second limiting groove, 301-first sliding groove, 302-second sliding groove, 303-third sliding groove, 304-fourth sliding groove, 305-air storage tank, 306-fifth sliding groove, 307-sixth sliding groove, 4-drill bit, 5-dust cover, 6-first limiting block, 7-sliding member, 8-second limiting block, 9-first sliding rod, 10-first sliding plate, 11-second sliding rod, 12-third limiting block, 13-third sliding rod, 14-limiting member, 15-second sliding plate, 16-fourth sliding rod, 17-fifth sliding rod, 18-sixth sliding rod. DETAILED DESCRIPTION

[0024] The following is a detailed description of a drilling device with dust suppression function for prospecting engineering provided by the present invention in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0025] When the existing drill rod is in use, the resistance of the drill bit when drilling a hole will be transmitted to the drill rod. When the drill bit drills into hard rock, the resistance encountered by the drill rod increases, and the resistance encountered by the drill rod also increases. At this time, the threaded connection between two adjacent drill rods will be further tightened, which will cause metal fatigue at the thread of the drill rod and reduce the service life of the drill rod.

[0026] Example 1: A drilling device with dust suppression function for prospecting engineering, please refer to Figure 1-Figure 3 , Figure 5 and Figure 6As shown, it includes a mounting frame 1, which is provided with a driving device 2. Both the mounting frame 1 and the driving device 2 are existing devices and are only shown in the figure. A drill rod 3 is provided on the lower side of the driving device 2, and a drill bit 4 is threadedly connected to the lower side of the drill rod 3. A dust cover 5 is fixed to the lower side of the mounting frame 1, and the dust cover 5 is used to shield the drilling position to prevent dust and gravel from splashing. Four first limit blocks 6 uniformly distributed in the circumferential direction are slidably connected to the upper side of the drill rod 3. A spring is provided between the first limit block 6 and the drill rod 3, and the spring is used to move the adjacent first limit blocks 6 in a direction close to the axis of the drill rod 3. Four first limit grooves 31 uniformly distributed in the circumferential direction are provided on the lower side of the drill rod 3. The shape of the first limit groove 31 is the same as that of the first limit block 6, and the volume of the first limit groove 31 is larger than the volume of the first limit block 6. The other adjacent The first limit groove 31 on the drill rod 3 is limitedly matched with the adjacent first limit block 6. When the two drill rods 3 are connected, the upper drill rod 3 rotates clockwise relative to the lower drill rod 3 from the top view direction, and the first limit groove 31 on the upper drill rod 3 clamps the adjacent first limit block 6 on the lower drill rod 3, thereby preventing the threads between the two drill rods 3 from continuing to tighten. The first limit block 6 and the first limit groove 31 are both provided with inclined surfaces, and the inclined surfaces of the first limit groove 31 are squeezed and matched with the inclined surfaces of the first limit block 6. When the two drill rods 3 are separated, the upper drill rod 3 rotates counterclockwise relative to the lower drill rod 3 from the top view direction, and the inclined surfaces of the first limit groove 31 on the upper drill rod 3 squeeze the inclined surfaces of the adjacent first limit block 6 on the lower drill rod 3, thereby causing the first limit block 6 on the lower drill rod 3 to move in a direction away from the axis of the drill rod 3.

[0027] Please refer to Figure 3-Figure 5 As shown, four first sliding grooves 301 uniformly distributed in the circumferential direction are provided on the upper side of the drill rod 3, and the first sliding grooves 301 are slidably connected with a sliding member 7, which consists of a disc and a round rod, the disc portion of the sliding member 7 is located in the adjacent first sliding grooves 301, and the round rod portion of the sliding member 7 is slidably connected to the drill rod 3, and the sliding member 7 penetrates the portion of the drill rod 3 located between the adjacent first sliding grooves 301 and the adjacent first limit block 6, and a second limit block 8 is fixedly connected to the upper side of the sliding member 7, and the second limit block 8 is limitedly matched with the adjacent first limit block 6. When the second limit block 8 limits the adjacent first limit block 6, the first limit block 6 cannot move in the direction close to the axis of the drill rod 3.

[0028] Please refer to Figure 3 and Figure 4As shown, the drill rod 3 is provided with four second sliding grooves 302 uniformly distributed in the circumference, and the first sliding rod 9 is slidably connected in the second sliding groove 302. A spring is arranged between the first sliding rod 9 and the drill rod 3, and the spring is used to reset the adjacent first sliding rod 9. The drill rod 3 is provided with four third sliding grooves 303 uniformly distributed in the circumference, and the first sliding plate 10 is slidably connected in the third sliding groove 303. The first sliding rod 9 and the adjacent first sliding plate 10 are jointly fixed with the second sliding rod 11. When the first sliding rod 9 moves, the adjacent first sliding plate 10 is driven to move by the adjacent sliding rod 11. The second sliding rod 11 is slidably connected to the drill rod 3, and the third sliding groove 303 is communicated with the adjacent first sliding groove 301, and both are filled with liquid. The liquid mentioned here and below is hydraulic oil used for transmission.

[0029] When using the device, first place the device at the drilling site, then connect the lower side of the drill rod 3 to the upper side of the drill bit 4, and then connect the upper side of the drill rod 3 to the driving device 2, and then start the driving device 2. The driving device 2 drives the drill bit 4 to drill through the drill rod 3. The dust and gravel generated during drilling are blocked by the dust cover 5, thereby preventing the gravel from flying and the dust from scattering. During drilling, the driving device 2 drives the drill rod 3 to move downward while rotating. When the length of the drill rod 3 is not enough, the connection between the driving device 2 and the drill rod 3 is disconnected, and then a new drill rod 3 is connected between the drill rod 3 and the driving device 2, so as to perform deeper drilling. When the two drill rods 3 are connected, the driving device 2 drives the new drill rod 3 to rotate clockwise from the top view. The old drill rod 3 encounters resistance when rotating because the drill bit 4 is in contact with the bottom of the borehole. At this time, the new drill rod 3 rotates clockwise from the top view relative to the old drill rod 3, thereby connecting the new and old drill rods 3 together. As the two drill rods 3 are gradually connected, the lower side of the new drill rod 3 contacts the first sliding rod 9 on the old drill rod 3, and the new drill rod 3 squeezes the first sliding rod 9 to move downward. The first sliding rod 9 moves downward and compresses the adjacent spring. The first sliding rod 9 drives the adjacent second sliding rod 11 to move downward, and the second sliding rod 11 drives the adjacent A sliding plate 10 moves downward, and the first sliding plate 10 presses the liquid in the adjacent third sliding groove 303 into the adjacent first sliding groove 301. The liquid in the first sliding groove 301 increases, and the liquid pressure becomes greater, pushing the adjacent sliding member 7 to move downward, and the sliding member 7 drives the adjacent second limit block 8 to move downward, and the second limit block 8 gradually separates from the adjacent first limit block 6. When the second limit block 8 separates from the adjacent first limit block 6, the first limit block 6 moves toward the direction close to the new drill rod 3 under the action of the adjacent spring, and the first limit block 6 contacts the new drill rod 3. At this time, the new drill rod 3 continues to rotate. When the new drill rod 3 is When the first limiting groove 31 is aligned with the adjacent first limiting block 6 on the old drill rod 3, the first limiting block 6 is inserted into the first limiting groove 31 on the new drill rod 3 under the action of the adjacent spring. At this time, the connection torque between the old and new drill rods 3 has reached a relatively strong torque. When the new drill rod 3 rotates, it is blocked by the first limiting block 6 on the old drill rod 3, so the new and old drill rods 3 no longer rotate relative to each other, thereby avoiding the connection torque between the new and old drill rods 3 from continuing to increase, and then avoiding excessive torque when the two drill rods 3 are connected, thereby extending the service life of the thread on the drill rod 3 and making it more convenient to separate the two drill rods 3 connected to each other.

[0030] When the drilling is completed, the interconnected drill rods 3 are separated, and the driving device 2 drives the drill rod 3 to move upward. When the upper side of the second drill rod 3 from the top to the bottom is higher than the upper side of the dust cover 5, the second drill rod 3 from the top to the bottom is fixed, and then the driving device 2 drives the upper drill rod 3 to rotate counterclockwise from the top view. The upper drill rod 3 rotates counterclockwise, and the inclined surface of the first limiting groove 31 on it squeezes the inclined surface of the adjacent first limiting block 6 on the second drill rod 3 from the top to the bottom, so that the first limiting block 6 is gradually reset and the adjacent spring is compressed. At the same time, the upper drill rod 3 is gradually aligned with the second drill rod 3 from the top to the bottom. The first sliding rod 9 on the second drill rod 3 is separated, and the first sliding rod 9 is gradually reset under the action of the adjacent spring. When the first sliding rod 9 is reset, the adjacent first sliding plate 10 is reset through the adjacent second sliding rod 11. The first sliding plate 10 drives the adjacent second limit block 8 to reset, and the second limit block 8 is re-limited to the adjacent first limit block 6. Then the upper drill rod 3 continues to be rotated. When the upper drill rod 3 is separated from the second drill rod 3 from the top to the bottom, the driving device 2 is connected to the original second drill rod 3, and then the above operation is repeated to separate all the connected drill rods 3.

[0031] When the drill pipe is in use, if the thread is damaged due to metal fatigue, several drill pipes connected to each other will be separated, and several drill pipes on the lower side will fall into the well. Whether the drill pipes that fall into the well are taken out or directly discarded, additional economic losses will be caused.

[0032] Example 2: Based on Example 1, please refer to Figure 3 and Figure 6 As shown, it also includes four third limit blocks 12 evenly distributed in the circumferential direction, and the four third limit blocks 12 are all slidably connected to the upper side of the drill rod 3. A spring is arranged between the four third limit blocks 12 and the drill rod 3. The spring is initially in a compressed state and is used to move adjacent third limit blocks 12 toward the direction close to the axis of the drill rod 3. A second limit groove 32 is arranged on the lower side of the drill rod 3. The four third limit blocks 12 are all limitedly matched with the second limit grooves 32 on other adjacent drill rods 3. When the third limit block 12 moves to contact the second limit grooves 32 on other adjacent drill rods 3, the two adjacent drill rods 3 are connected.

[0033] Please refer to Figure 3 and Figure 4As shown, four fourth sliding grooves 304 evenly distributed in the circumferential direction are arranged on the upper side of the drill rod 3, and the fourth sliding grooves 304 are slidably connected with the third sliding rods 13, and the four third sliding rods 13 are commonly fixedly connected with the limiting member 14, and the limiting member 14 is slidably connected to the drill rod 3, and a spring is arranged between the two, and the spring is used to enable the limiting member 14 to maintain the limiting position of the four third limiting blocks 12, and the four third limiting blocks 12 are all limited by the limiting member 14, and when the limiting member 14 moves upward to separate from the third limiting block 12, the third limiting block 12 moves under the action of the adjacent spring.

[0034] Please refer to Figure 3 and Figure 4 As shown, the drill rod 3 is provided with an air storage tank 305, in which gas is filled. The gas has a certain pressure and is used to push the four third sliding rods 13 to move upward. The drill rod 3 is provided with four channels evenly distributed circumferentially, and the four fourth sliding grooves 304 are connected to the air storage tank 305 through adjacent channels respectively.

[0035] Please refer to Figure 3 and Figure 4 As shown, four fifth sliding grooves 306 evenly distributed in the circumferential direction are provided on one side of the drill rod 3 close to the air storage tank 305, a second sliding plate 15 is slidably connected in the fifth sliding groove 306, a fourth sliding rod 16 is fixedly connected to the second sliding plate 15, the fourth sliding rod 16 is slidably connected to the drill rod 3, the fourth sliding rod 16 cooperates with the adjacent channel blockage, the fourth sliding rod 16 initially blocks the adjacent channel, the fourth sliding rod 16 is provided with an annular groove, when the annular groove of the fourth sliding rod 16 enters the adjacent channel, the channel is unblocked.

[0036] Please refer to Figure 3 and Figure 4 As shown, four sixth sliding grooves 307 evenly distributed in the circumference are provided on the upper side of the drill pipe 3, and the fifth sliding rod 17 is slidably connected in the sixth sliding groove 307. A spring is provided between the fifth sliding rod 17 and the drill pipe 3, and the spring is used to reset the adjacent fifth sliding rod 17. The second sliding groove 302, the fifth sliding groove 306 and the sixth sliding groove 307 are all filled with gas, and the second sliding groove 302 and the adjacent sixth sliding groove 307 are both connected to the adjacent fifth sliding groove 306. When the pressure of the gas in the second sliding groove 302 and the sixth sliding groove 307 is different, the adjacent second sliding plate 15 is pushed to move.

[0037] Please refer to Figure 3 and Figure 4As shown, the fifth sliding rod 17 is fixedly connected to the sixth sliding rod 18, and the sixth sliding rod 18 is used to make the volume of the remaining space in the second sliding groove 302 and the sixth sliding groove 307 equal, the sixth sliding rod 18 is slidably connected to the drill pipe 3, the diameters of the second sliding groove 302 and the sixth sliding groove 307 are equal, the diameters of the second sliding rod 11 and the sixth sliding rod 18 are equal, and the first sliding rod 9 and the fifth sliding rod 17 are respectively at the same position in the adjacent second sliding groove 302 and the adjacent sixth sliding groove 307, so that when the first sliding rod 9 and the fifth sliding rod 17 move synchronously, the gas volume change rate in the adjacent second sliding groove 302 and the adjacent sixth sliding groove 307 is the same, so as to ensure that the air pressure on both sides of the adjacent second sliding plate 15 in the adjacent fifth sliding groove 306 is equal, and then when the first sliding rod 9 and the adjacent fifth sliding rod 17 move synchronously, the adjacent second sliding plate 15 will not move.

[0038] When the two drill rods 3 are connected, the upper drill rod 3 squeezes the fifth sliding rod 17 and the first sliding rod 9 on the lower drill rod 3, the fifth sliding rod 17 moves downward and compresses the adjacent spring, the first sliding rod 9 and the fifth sliding rod 17 respectively drive the adjacent second sliding rod 11 and the adjacent sixth sliding rod 18 to move, the first sliding rod 9 and the fifth sliding rod 17 compress the gas in the adjacent second sliding groove 302 and the adjacent sixth sliding groove 307 respectively, at this time, because the gas pressure in the second sliding groove 302 and the adjacent sixth sliding groove 307 are equal, the gas pressure in the adjacent fifth sliding groove 306 on both sides of the adjacent second sliding plate 15 is equal, so the second sliding plate 15 will not move, when the two drill rods 3 are separated, the first sliding rod 9 and the fifth sliding rod 17 move upward synchronously, the air pressure in the adjacent second sliding groove 302 and the adjacent sixth sliding groove 307 still changes synchronously, so the second sliding plate 15 still does not move.

[0039] When two drill rods 3 cannot be connected due to thread damage, drilling can no longer be continued and the interconnected drill rods 3 need to be taken out and the damaged drill rods 3 need to be replaced. The driving device 2 drives the interconnected drill rods 3 to move upward, and the two drill rods 3 at the damaged thread are connected through the first limit groove 31 of the upper drill rod 3 and the first limit block 6 of the lower drill rod 3, thereby bringing all the interconnected drill rods 3 out of the well.

[0040] During the process of the first limit block 6 and the first limit groove 31 lifting the lower drill rod 3 out of the well, if the lower drill rod 3 collides with the well wall and causes damage to the first limit block 6 and the first limit groove 31, the two drill rods 3 move back to back and gradually separate, and the fifth sliding rod 17 is reset under the action of the adjacent spring. At this time, because the second limit block 8 is supported by the adjacent first limit block 6 and cannot move upward, the first sliding rod 9 cannot be reset under the action of the adjacent spring. When the fifth sliding rod 17 moves upward, the space in the adjacent sixth sliding groove 307 gradually becomes larger, and the air pressure therein gradually decreases. At this time, the air pressure of the adjacent fifth sliding groove 306 located on both sides of the adjacent second sliding plate 15 is no longer equal, and the air pressure on the side of the second sliding plate 15 close to the axis of the drill rod 3 is lower than the air pressure on the side away from the axis of the drill rod 3. The second sliding plate 15 moves in the direction close to the axis of the drill rod 3, and the second sliding plate 15 drives the adjacent fourth sliding rod 16 to move.

[0041] When the annular groove on the fourth sliding rod 16 is aligned with the adjacent channel, the fourth sliding rod 16 stops moving. At this time, the gas in the gas storage tank 305 enters the adjacent fourth sliding groove 304 through the channel, and then the gas pushes the third sliding rod 13 to move upward, and the third sliding rod 13 pushes the limiting member 14 to move upward. When the limiting member 14 is separated from the third limiting block 12, the third limiting block 12 moves in the direction close to the axis of the drill pipe 3 under the action of the adjacent spring, and stops moving when the third limiting block 12 contacts the upper drill pipe 3. When the second limiting groove 32 on the upper drill pipe 3 is aligned with the third limiting block 12, the third limiting block 12 is inserted into the second limiting groove 32 on the upper drill pipe 3 under the action of the adjacent spring, thereby avoiding the separation of the two drill pipes 3 at the thread damage site, preventing the drill pipe 3 and the drill bit 4 below the thread damage site from falling into the well, and thereby reducing the loss caused by thread damage.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A drilling device with dust suppression function for prospecting engineering, comprising a mounting frame (1), the mounting frame (1) being provided with a driving device (2), a drill rod (3) being provided at the lower side of the driving device (2), a drill bit (4) being threadedly connected at the lower side of the drill rod (3), wherein: It also includes a dust cover (5), the dust cover (5) being fixedly connected to the lower side of the mounting frame (1); the drill rod (3) is slidably connected to a first limiting block (6) evenly distributed in the circumferential direction; a spring is provided between the first limiting block (6) and the drill rod (3); a first limiting groove (31) evenly distributed in the circumferential direction is provided on one side of the drill rod (3) away from the first limiting block (6) evenly distributed in the circumferential direction; and the first limiting grooves (31) on other adjacent drill rods (3) are limitedly matched with adjacent first limiting blocks (6); A first sliding groove (301) evenly distributed in the circumferential direction is provided on one side of the drill rod (3) close to the first limiting block (6) evenly distributed in the circumferential direction, a sliding member (7) is slidably connected to the first sliding groove (301), the sliding member (7) is slidably connected to the drill rod (3), the sliding member (7) penetrates the portion of the drill rod (3) located between the adjacent first sliding groove (301) and the adjacent first limiting block (6), a second limiting block (8) is fixedly connected to one side of the sliding member (7) close to the adjacent first limiting block (6), and the second limiting block (8) is limitedly matched with the adjacent first limiting block (6); The drill rod (3) is provided with a second sliding groove (302) evenly distributed in the circumference, a first sliding rod (9) is slidably connected in the second sliding groove (302), a spring is provided between the first sliding rod (9) and the drill rod (3), the drill rod (3) is provided with a third sliding groove (303) evenly distributed in the circumference, a first sliding plate (10) is slidably connected in the third sliding groove (303), the first sliding rod (9) and the adjacent first sliding plate (10) are fixedly connected with a second sliding rod (11), the second sliding rod (11) is slidably connected to the drill rod (3), the third sliding groove (303) is communicated with the adjacent first sliding groove (301), and both are filled with liquid.

2. The drilling device with dust suppression function for prospecting engineering according to claim 1 is characterized in that: The first limiting block (6) and the first limiting groove (31) are both provided with inclined surfaces, and the inclined surface of the first limiting groove (31) is pressed and matched with the inclined surface of the first limiting block (6).

3. The drilling device with dust suppression function for prospecting engineering according to claim 1 is characterized by: It also includes third limit blocks (12) evenly distributed in the circumferential direction, the third limit blocks (12) evenly distributed in the circumferential direction are all slidably connected to the drill rod (3), a spring is arranged between the third limit blocks (12) evenly distributed in the circumferential direction and the drill rod (3), a second limit groove (32) is arranged on a side of the drill rod (3) away from the third limit blocks (12) evenly distributed in the circumferential direction, and the third limit blocks (12) evenly distributed in the circumferential direction are all in position-limiting cooperation with the second limit grooves (32) on other adjacent drill rods (3).

4. The drilling device with dust suppression function for prospecting engineering according to claim 3 is characterized by: A fourth sliding groove (304) evenly distributed in the circumferential direction is provided on one side of the drill rod (3) close to the third limiting block (12) evenly distributed in the circumferential direction, the fourth sliding groove (304) is slidably connected to a third sliding rod (13), the third sliding rod (13) evenly distributed in the circumferential direction is jointly fixedly connected to a limiting member (14), the limiting member (14) is slidably connected to the drill rod (3), a spring is provided between the two, and the third limiting blocks (12) evenly distributed in the circumferential direction are all in limiting cooperation with the limiting member (14).

5. The drilling device with dust suppression function for prospecting engineering according to claim 4 is characterized in that: A gas storage groove (305) is provided on one side of the drill rod (3) close to the third sliding grooves (303) evenly distributed in the circumferential direction, and gas is filled in the gas storage groove (305). The drill rod (3) is provided with channels evenly distributed in the circumferential direction, and the fourth sliding grooves (304) evenly distributed in the circumferential direction are connected to the gas storage groove (305) through adjacent channels.

6. The drilling device with dust suppression function for prospecting engineering according to claim 5 is characterized by: A fifth sliding groove (306) evenly distributed in the circumferential direction is provided on one side of the drill rod (3) close to the gas storage tank (305); a second sliding plate (15) is slidably connected in the fifth sliding groove (306); a fourth sliding rod (16) is fixedly connected to the second sliding plate (15); the fourth sliding rod (16) is slidably connected to the drill rod (3); the fourth sliding rod (16) cooperates with an adjacent channel plug; the fourth sliding rod (16) is provided with an annular groove.

7. The drilling device with dust suppression function for prospecting engineering according to claim 6 is characterized by: A sixth sliding groove (307) evenly distributed in the circumferential direction is provided on one side of the drill rod (3) close to the first sliding rod (9) evenly distributed in the circumferential direction, a fifth sliding rod (17) is slidably connected in the sixth sliding groove (307), a spring is provided between the fifth sliding rod (17) and the drill rod (3), gas is injected into the second sliding groove (302), the fifth sliding groove (306) and the sixth sliding groove (307), and the second sliding groove (302) and the adjacent sixth sliding groove (307) are both connected to the adjacent fifth sliding groove (306).

8. The drilling device with dust suppression function for prospecting engineering according to claim 7 is characterized by: The fifth sliding rod (17) is fixedly connected to the sixth sliding rod (18), the sixth sliding rod (18) is slidably connected to the drill rod (3), the diameters of the second sliding groove (302) and the sixth sliding groove (307) are equal, the diameters of the second sliding rod (11) and the sixth sliding rod (18) are equal, and the first sliding rod (9) and the fifth sliding rod (17) are respectively located at the same position in the adjacent second sliding groove (302) and the adjacent sixth sliding groove (307).

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