Geological survey drilling equipment

Abstract

The invention relates to the technical field of geological survey drilling, in particular to geological survey drilling equipment which comprises a base, a supporting frame is fixedly connected to the upper end of the base, a sliding groove is formed in the supporting frame, a drilling mechanism is arranged at one end of the supporting frame, and the drilling mechanism comprises a first drill bit. An impact mechanism is arranged at the lower end of the first drill bit, an attaching plate is fixedly connected to the surface of the first drill bit and is in a bucket shape with an upward opening, a sealing mechanism is arranged at the upper end of the first drill bit, and a supporting mechanism for pushing the attaching plate to be attached to the hole wall is arranged at the position, close to the sealing mechanism, of the upper end of the first drill bit. A pressure relief mechanism is arranged in the laminating plate; the hole wall of the drill hole is expanded and compacted through the arranged attaching plate, gas exhausted by the first exhaust hole and the second exhaust hole is reserved in the hole to further expand the hole, high-pressure gas enters the lower end from the upper end of the first drill bit to be exhausted, and flowing airflow can take away heat in the first drill bit.

Description

Technical Field

[0001] The present invention relates to the technical field of geological exploration drilling, and specifically relates to a geological exploration drilling device. Background Art

[0002] Geological exploration drilling equipment is the core tool for obtaining underground geological information and is widely used in fields such as mineral exploration, engineering geological exploration, and hydrogeological investigation. The following will elaborate in detail from aspects such as equipment type, technical characteristics, application scenarios, technical parameters, and development trends. Its core function is to extract underground physical samples (such as cores and cuttings) or conduct in-situ tests through drilling operations to provide basic data for geological research. Such equipment usually includes a drilling rig, drill tools, a power system, a mud circulation system, etc. According to the drilling depth, geological conditions, and operation requirements, it can be divided into shallow exploration equipment (such as portable core drills) and deep exploration equipment (such as large oil drilling rigs).

[0003] In the field of geological exploration, drilling is an important means to obtain underground geological information. Traditional geological exploration drilling equipment has many problems during the drilling process. For example, the drilling efficiency is low. When drilling in loose soil layers, the holes are prone to collapse after drilling. The hole collapse may cause the core to be unable to be extracted completely or even be completely damaged, directly affecting the acquisition of key information such as lithology, mineral composition, and structural characteristics, and affecting subsequent exploration work. Moreover, a large amount of heat is generated during the operation of the drill bit. If the heat cannot be dissipated in time, it will affect the service life of the drill bit and the drilling quality. Also, when the drill bit is lifted upward, due to the large friction between the hole wall and the drill bit, the lifting resistance is large, increasing the energy consumption and operation difficulty of the equipment. Therefore, the present invention designs a geological exploration drilling device to solve the above problems. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides a geological exploration drilling device.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a geological exploration drilling device, including a base, the upper end of the base is fixedly connected with a support frame, a chute is opened inside the support frame, one end of the support frame is provided with a drilling mechanism for tunneling into the soil layer. The drilling mechanism includes a first drill bit, the lower end of the first drill bit is provided with an impact mechanism for expanding the hole wall of the drill hole, the surface of the first drill bit is fixedly connected with a fitting plate, the fitting plate is in the shape of a bucket with an upward opening, the upper end of the first drill bit is provided with a sealing mechanism for sealing the hole at the lower end of the fitting plate, the upper end of the first drill bit is provided with a support mechanism for pushing the fitting plate to fit against the hole wall near the sealing mechanism, and a pressure relief mechanism for automatically relieving the excessive air pressure in the hole at the lower end of the fitting plate is arranged inside the fitting plate.

[0006] Preferably, the drilling mechanism includes a first reduction gear, the output end of the first reduction gear is fixedly connected with a lead screw, the surface of the lead screw is engaged with a sliding block, and one end of the sliding block is slidably connected with the chute.

[0007] Preferably, the drilling mechanism further includes a second reduction gear, one end of the sliding block is fixedly connected with the second reduction gear, the output end of the second reduction gear is fixedly connected with a rotating shaft, the rotating shaft is rotatably connected with an air inlet pipe, a first hollow groove is formed inside the air inlet pipe, and the lower end of the rotating shaft is fixedly connected with a first drill bit.

[0008] Preferably, the impact mechanism includes a second drill bit, the upper end of the second drill bit is square, the lower end of the second drill bit is round, the second drill bit is slidably connected with the first drill bit, the upper end of the second drill bit is fixedly connected with the air inlet pipe, a second hollow groove is formed inside the second drill bit, a third hollow groove is further formed inside the second drill bit, a first exhaust hole is arranged on the surface of the second drill bit, and a second exhaust hole is arranged at the lower end of the second drill bit.

[0009] Preferably, the sealing mechanism includes a fitting plate, the fitting plate is fixedly connected with the first drill bit, and a first opening is formed inside the lower end of the fitting plate.

[0010] Preferably, the sealing mechanism further includes a second opening, and a second opening is formed inside the upper end of the fitting plate.

[0011] Preferably, the support mechanism includes a first sleeve, the first sleeve is fixedly connected with the inner surface of the first drill bit, a baffle is slidably connected inside the first sleeve, the upper end of the baffle is fixedly connected with a spring, the upper end of the spring is fixedly connected with the first sleeve, the upper end of the first sleeve is fixedly connected with a second sleeve, a piston is slidably connected inside the second sleeve, and a connecting pipe is fixedly connected with the upper end of the second sleeve.

[0012] Preferably, the support mechanism further includes an airbag, one end of the connecting pipe is fixedly connected with the airbag, and the airbag is fixedly connected with the first drill bit.

[0013] Preferably, the pressure relief mechanism includes a rubber ball, and the surface of the rubber ball fits with the surface of the first opening.

[0014] Preferably, the pressure relief mechanism further includes an elastic plate, the surface of the rubber ball is fixedly connected with the elastic plate, and one end of the elastic plate is fixedly connected with the fitting plate.

[0015] The beneficial effects of the present invention:

[0016] (1) A geological exploration drilling device according to the present invention, the second drill bit impacts and pre-drills the soil layer, the first drill bit further drills, and at the same time, the first exhaust hole is inclined, which can clean the debris around the second drill bit and promote its rotation. The second exhaust hole discharges gas to impact the soil layer, jointly improving the drilling efficiency.

[0017] (2) A geological exploration drilling device according to the present invention, the hole wall of the drill hole is expanded and compacted by the provided fitting plate. The gas discharged from the first exhaust hole and the second exhaust hole remains in the hole to further expand the hole. The high-pressure gas enters from the upper end of the first drill bit and discharges from the lower end, and the flowing air flow can also take away the heat inside the first drill bit.

[0018] (3) A geological exploration drilling device according to the present invention, the high-pressure gas enters from the upper end of the first drill bit and discharges from the lower end, and the flowing air flow can take away the heat inside the first drill bit, enabling the first drill bit to be cooled in time during operation; the high-pressure gas discharged from the first drill bit also passes through the second drill bit to cool the second drill bit, ensuring the normal operation of the device, reducing the wear of the drill bit. After the drilling is completed, the fitting plate in the shape of a bucket can lift the soil above the fitting plate in the hole.

[0019] (4) A geological exploration drilling device according to the present invention, when the second drill bit moves upward and slides into the first drill bit, it will drive the airbag to expand. The airbag is filled with gas and will push the fitting plate to fit the hole wall, promoting the sealing of the hole wall at the lower end of the fitting plate. After the drilling is completed, the spring drives the piston to slide downward and reset, generating negative pressure in the second sleeve, and the air in the airbag is pumped out through the connecting pipe. The airbag deflates and loses the driving force on the fitting plate. The fitting plate contracts and approaches the first drill bit under its own elastic force, slightly away from the hole wall, reducing the resistance when the first drill bit is lifted upward.

[0020] (5) A geological exploration drilling device according to the present invention, when the air pressure in the hole wall reaches a certain pressure, the high-pressure gas will push the rubber ball in the fitting plate to move upward away from the first opening, enabling the high-pressure gas to enter the inside of the fitting plate and discharge from the second opening, realizing automatic pressure relief and preventing the pressure in the hole wall from being too high. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the drawings and embodiments.

[0022] Figure 1 It is a schematic diagram of the overall structure provided by the present invention;

[0023] Figure 2 It is a schematic diagram of the connection structure between the rotating shaft and the air inlet pipe;

[0024] Figure 3 It is a schematic diagram of the structure of the second drill bit;

[0025] Figure 4 Schematic diagram of the stop block structure

[0026] Figure 5 Schematic diagram of the fitting plate structure

[0027] Figure 6 Schematic diagram of the connection structure between the baffle and the spring

[0028] Figure 7 Schematic diagram of the second hollow groove structure

[0029] Figure 8 Schematic diagram of the first exhaust hole structure

[0030] Figure 9 Schematic diagram of the second exhaust hole structure

[0031] Figure 10 For Figure 5 Schematic diagram of the enlarged structure of part A shown

[0032] In the figure: 100, base; 101, support frame; 1011, chute; 200, drilling mechanism; 201, first reduction gear; 202, lead screw; 203, sliding block; 204, second reduction gear; 205, rotating shaft; 206, intake pipe; 2061, first hollow groove; 207, first drill bit; 300, impact mechanism; 301, second drill bit; 302, second hollow groove; 303, third hollow groove; 304, first exhaust hole; 305, second exhaust hole; 306, stop block; 400, sealing mechanism; 401, fitting plate; 402, first opening; 403, second opening; 500, support mechanism; 501, first sleeve; 502, baffle; 503, spring; 504, second sleeve; 505, piston; 506, connecting pipe; 507, airbag; 600, pressure relief mechanism; 601, rubber ball; 602, elastic plate. Detailed implementation manners

[0033] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0034] Such as Figures 1-10As shown in the figure, a geological exploration drilling device according to the present invention includes a base 100. The upper end of the base 100 is fixedly connected with a support frame 101. A chute 1011 is formed inside the support frame 101. One end of the support frame 101 is provided with a drilling mechanism 200 for tunneling into the soil layer. The drilling mechanism 200 includes a first drill bit 207. The lower end of the first drill bit 207 is provided with an impact mechanism 300 for expanding the hole wall of the drill hole. The surface of the first drill bit 207 is fixedly connected with a fitting plate 401. The fitting plate 401 is in the shape of a bucket with an upward opening. The upper end of the first drill bit 207 is provided with a sealing mechanism 400 for sealing the hole at the lower end of the fitting plate 401. Near the upper end of the first drill bit 207 and the sealing mechanism 400, there is a support mechanism 500 for pushing the fitting plate 401 to fit the hole wall. Inside the fitting plate 401, there is a pressure relief mechanism 600 for automatically relieving the excessive air pressure in the hole at the lower end of the fitting plate 401.

[0035] Specifically, the drilling mechanism 200 includes a first reduction gear 201. The output end of the first reduction gear 201 is fixedly connected with a lead screw 202. A sliding block 203 is engaged with the surface of the lead screw 202. One end of the sliding block 203 is slidably connected with the chute 1011. One end of the sliding block 203 is fixedly connected with a second reduction gear 204. The output end of the second reduction gear 204 is fixedly connected with a rotating shaft 205. The rotating shaft 205 is rotatably connected with an air inlet pipe 206. A first hollow groove 2061 is formed inside the air inlet pipe 206. The lower end of the rotating shaft 205 is fixedly connected with a first drill bit 207.

[0036] In addition, during use, first place the geological exploration drilling device at a designated position, start the first reduction gear 201 to rotate. The rotation of the first reduction gear 201 will drive the lead screw 202 to rotate. The rotation of the lead screw 202 will drive the sliding block 203 to move downward. The sliding block 203 slides in the chute 1011, and the chute 1011 plays a role in limiting the sliding block 203. The downward movement of the sliding block 203 will drive the second reduction gear 204 to move downward. The downward movement of the second reduction gear 204 will drive the rotating shaft 205 to move downward. The downward movement of the rotating shaft 205 will drive the first drill bit 207 to move downward.

[0037] Specifically, at the same time, the second reduction gear 204 is started to rotate. The rotation of the second reduction gear 204 drives the rotation of the rotating shaft 205. The rotation of the rotating shaft 205 drives the rotation of the first drill bit 207. While the first drill bit 207 is rotating, it drives the rotation of the second drill bit 301. The rotation of the second drill bit 301 impacts and pre-bores the soil layer. The rotation of the first drill bit 207 further bores the soil layer. The fitting plate 401 at the upper end of the first drill bit 207 can expand and compact the hole wall of the drill hole, preventing the collapse of the hole after drilling from affecting subsequent geological surveys. At the same time, high-pressure gas is introduced into the intake pipe 206. The high-pressure gas inside the intake pipe 206 enters the first drill bit 207 through the first hollow groove 2061.

[0038] In addition, the impact mechanism 300 includes a second drill bit 301. The upper end of the second drill bit 301 is square, and the lower end of the second drill bit 301 is circular. The second drill bit 301 is slidably connected to the first drill bit 207. The upper end of the second drill bit 301 is fixedly connected to the intake pipe 206. A second hollow groove 302 is formed inside the second drill bit 301. A third hollow groove 303 is also formed inside the second drill bit 301. A first exhaust hole 304 is provided on the surface of the second drill bit 301. A second exhaust hole 305 is provided at the lower end of the second drill bit 301. When the stop block 306 contacts the soil layer, it slides into the first drill bit 207. The stop block 306 is conical. The stop block 306 provides the power to push the second drill bit 301 to slide into the first drill bit 207. The upward movement of the stop block 306 drives the upward movement of the second drill bit 301. The upward movement of the second drill bit 301 drives the second hollow groove 302 away from the first drill bit 207. At this time, the high-pressure gas inside the first drill bit 207 enters the third hollow groove 303 through the second hollow groove 302. The high-pressure gas inside the third hollow groove 303 is discharged through the first exhaust hole 304 and the second exhaust hole 305. The discharge through the second exhaust hole 305 can impact the soil layer and improve the drilling efficiency. The first exhaust hole 304 is inclined on the surface of the second drill bit 301, which can clean the debris around the second drill bit 301. At the same time, the high-pressure gas discharged through the first exhaust hole 304 can further promote the rotation of the second drill bit 301, further improving the drilling efficiency. At the same time, the gas discharged through the first exhaust hole 304 and the second exhaust hole 305 remains in the hole. The expansion of the high-pressure gas further expands the hole, thus improving the firmness of the hole.

[0039] Further, when the provided stopper 306 contacts the soil layer, it will slide into the first drill bit 207. At this time, the high-pressure gas inside the first drill bit 207 will enter the inside of the third hollow groove 303 through the second hollow groove 302. The high-pressure gas enters from the upper end of the first drill bit 207 and is discharged from the lower end. In this way, the flowing air current can take away the heat inside the first drill bit 207, enabling the first drill bit 207 to be cooled in time during operation. The high-pressure gas discharged from the first drill bit 207 will also pass through the second drill bit 301, so that the high-pressure gas can also cool the second drill bit 301. At the same time, the gas discharged from the first exhaust hole 304 and the second exhaust hole 305 remains in the hole, and the expansion of the high-pressure gas will further expand the hole.

[0040] Further, the sealing mechanism 400 includes a fitting plate 401. The fitting plate 401 is fixedly connected to the first drill bit 207. A first opening 402 is formed inside the lower end of the fitting plate 401, and a second opening 403 is formed inside the upper end of the fitting plate 401. By providing the fitting plate 401 on the surface of the first drill bit 207, the fitting plate 401 is on the surface where the first drill bit 207 is located. The fitting plate 401 seals between the first drill bit 207 and the hole wall. The fitting plate 401 is in the shape of a funnel with a larger upper part and a smaller lower part. The inside of the fitting plate 401 is hollow. The fitting plate 401 is made of spring steel and has good elasticity. When the first drill bit 207 moves downward, it will drive the fitting plate 401 to move downward. The downward movement of the fitting plate 401 will expand the hole wall. The fitting plate 401 is in the shape of a funnel and is made of spring steel, and the elastic coefficient of the fitting plate 401 is relatively large. In this way, when the fitting plate 401 moves downward to expand the hole wall and encounters a hard object, it will actively contract. After the drilling is completed, the fitting plate 401 in the shape of a funnel can lift the soil above the fitting plate 401 in the hole.

[0041] Furthermore, the support mechanism 500 includes a first sleeve 501 which is fixedly connected to the inner surface of the first drill bit 207. A baffle 502 is slidably connected inside the first sleeve 501. The upper end of the baffle 502 is fixedly connected to a spring 503, and the upper end of the spring 503 is fixedly connected to the first sleeve 501. The upper end of the first sleeve 501 is fixedly connected to a second sleeve 504. A piston 505 is slidably connected inside the second sleeve 504. The upper end of the second sleeve 504 is fixedly connected to a connecting pipe 506. One end of the connecting pipe 506 is fixedly connected to an airbag 507, and the airbag 507 is fixedly connected to the first drill bit 207. When the second drill bit 301 moves upward, it will drive the baffle 502 to move upward. The upward movement of the baffle 502 will compress the spring 503. The upward movement of the baffle 502 will drive the intake pipe 206 to move upward. The upward movement of the intake pipe 206 will drive the piston 505 to move upward. The upward movement of the piston 505 will discharge the air inside the second sleeve 504 into the airbag 507. When the airbag 507 is filled with gas, it will push the fitting plate 401 to fit against the hole wall.

[0042] It should be noted that when the drilling is completed and lifted upward, it will drive the first drill bit 207 to move upward. At this time, the spring 503 will drive the piston 505 to slide downward to reset. The downward sliding reset of the piston 505 will create a negative pressure inside the second sleeve 504. The negative pressure inside the second sleeve 504 will draw out the air inside the airbag 507 through the connecting pipe 506. When the air inside the airbag 507 is drawn out and deflated, it will lose the driving force on the fitting plate 401. At this time, the fitting plate 401 will contract and approach the first drill bit 207 under the action of its own elastic force. In this way, the fitting plate 401 will be slightly away from the hole wall. The function of this is to reduce the resistance when the first drill bit 207 is lifted upward. The fitting plate 401 is in the shape of a round funnel, with a large upper opening and a small lower opening.

[0043] It should be noted that the pressure relief mechanism 600 includes a rubber ball 601, the surface of the rubber ball 601 is in contact with the surface of the first opening 402, and the surface of the rubber ball 601 is fixedly connected to an elastic plate 602. One end of the elastic plate 602 is fixedly connected to the fitting plate 401. When the air pressure in the hole wall reaches a certain value, the high-pressure gas will push the rubber ball 601 to move upward away from the first opening 402. The upward movement of the rubber ball 601 will compress the elastic plate 602. The lower opening of the first opening 402 is small and the upper opening is large. When the rubber ball 601 moves upward away from the first opening 402, the high-pressure gas enters the inside of the fitting plate 401, and the high-pressure gas inside the fitting plate 401 is discharged from the second opening 403. The lower opening of the second opening 403 is large and the upper opening is small. By providing the rubber ball 601, the pressure inside the hole wall between the fitting plate 401 and the second drill bit 301 can be relieved, and when the pressure in the hole wall reaches a certain value, it will automatically relieve the pressure.

[0044] Working principle: When the present invention is in use, first place the geological exploration drilling equipment at the designated position, start the rotation of the first speed reducer 201. The rotation of the first speed reducer 201 drives the rotation of the lead screw 202. The rotation of the lead screw 202 drives the sliding block 203 to move downward. The sliding block 203 slides in the chute 1011, and the chute 1011 plays a role in limiting the sliding block 203. The downward movement of the sliding block 203 drives the second speed reducer 204 to move downward. The downward movement of the second speed reducer 204 drives the rotating shaft 205 to move downward. The downward movement of the rotating shaft 205 drives the first drill bit 207 to move downward. At the same time, start the rotation of the second speed reducer 204. The rotation of the second speed reducer 204 drives the rotation of the rotating shaft 205. The rotation of the rotating shaft 205 drives the rotation of the first drill bit 207. While the first drill bit 207 is rotating, it drives the rotation of the second drill bit 301. The rotation of the second drill bit 301 impacts and pre-bores the soil layer, and the rotation of the first drill bit 207 further bores the soil layer. The fitting plate 401 at the upper end of the first drill bit 207 can expand and compact the hole wall of the drill hole, preventing the collapse of the hole after drilling from affecting subsequent geological exploration. At the same time, high-pressure gas is introduced into the intake pipe 206, and the high-pressure gas inside the intake pipe 206 enters the first drill bit 207 through the first hollow groove 2061.

[0045] When the stop block 306 contacts the soil layer, it slides into the first drill bit 207. The stop block 306 is conical, and the stop block 306 provides the power to push the second drill bit 301 to slide into the first drill bit 207. The upward movement of the stop block 306 drives the upward movement of the second drill bit 301. The upward movement of the second drill bit 301 drives the second hollow groove 302 away from the first drill bit 207. At this time, the high-pressure gas inside the first drill bit 207 enters the third hollow groove 303 through the second hollow groove 302. The high-pressure gas inside the third hollow groove 303 is discharged through the first exhaust hole 304 and the second exhaust hole 305. The discharge of the second exhaust hole 305 can impact the soil layer to promote the drilling efficiency. The first exhaust hole 304 is inclined on the surface of the second drill bit 301, which can clean the debris around the second drill bit 301. At the same time, the high-pressure gas discharged from the first exhaust hole 304 can further promote the rotation of the second drill bit 301, further improving the drilling efficiency. At the same time, the gas discharged from the first exhaust hole 304 and the second exhaust hole 305 remains in the hole, and the expansion of the high-pressure gas further expands the hole, thus improving the firmness of the hole.

[0046] When the set stop block 306 contacts the soil layer, it will slide into the first drill bit 207. At this time, the high-pressure gas inside the first drill bit 207 will enter the inside of the third hollow groove 303 through the second hollow groove 302. The high-pressure gas enters from the upper end of the first drill bit 207 and discharges from the lower end. Such flowing air can take away the heat inside the first drill bit 207, enabling the first drill bit 207 to be cooled in time during operation. The high-pressure gas discharged from the first drill bit 207 will also pass through the second drill bit 301, so that the high-pressure gas can also cool the second drill bit 301. At the same time, the gas discharged from the first exhaust hole 304 and the second exhaust hole 305 remains in the hole, and the expansion of the high-pressure gas will further expand the hole.

[0047] Through the fitting plate 401 provided on the surface of the first drill bit 207, industrial filter cloths are provided on the inner surfaces of the first opening 402 and the second opening 403 inside the fitting plate 401. The industrial filter cloth can not only pass air but also block soil and dust from entering the fitting plate 401. The fitting plate 401 seals between the first drill bit 207 and the hole wall. The fitting plate 401 is in the shape of a funnel with a larger upper part and a smaller lower part. The inside of the fitting plate 401 is hollow. The fitting plate 401 is made of spring steel and has good elasticity. When the first drill bit 207 moves downward, it will drive the fitting plate 401 to move downward. The downward movement of the fitting plate 401 will expand the hole wall. The fitting plate 401 is in the shape of a funnel and is made of spring steel, and the elastic coefficient of the fitting plate 401 is relatively large. In this way, when the fitting plate 401 moves downward to expand the hole wall and encounters a hard object, it will actively contract. After the drilling is completed, the funnel-shaped fitting plate 401 can lift the soil at the upper end of the fitting plate 401 in the hole.

[0048] When the second drill bit 301 moves upward and slides into the first drill bit 207, it will drive the baffle plate 502 to move upward. The upward movement of the baffle plate 502 will compress the spring 503. The upward movement of the baffle plate 502 will drive the air inlet pipe 206 to move upward. The upward movement of the air inlet pipe 206 will drive the piston 505 to move upward. The upward movement of the piston 505 will discharge the air inside the second sleeve 504 into the airbag 507. When the airbag 507 is filled with gas, it will push the fitting plate 401 to fit the hole wall, promoting the sealing of the hole wall at the lower end of the fitting plate 401. When the drilling is completed and lifted upward, it will drive the first drill bit 207 to move upward. At this time, the spring 503 will drive the piston 505 to slide downward and reset. The downward sliding and resetting of the piston 505 will cause a negative pressure to be generated inside the second sleeve 504. The negative pressure generated inside the second sleeve 504 will draw out the air inside the airbag 507 through the connecting pipe 506. When the air inside the airbag 507 is drawn out and becomes deflated, it will lose the driving force on the fitting plate 401. At this time, the fitting plate 401 will contract and approach the first drill bit 207 under the action of its own elastic force. In this way, the fitting plate 401 will be slightly away from the hole wall. The function of this is to reduce the resistance when the first drill bit 207 is lifted upward. The fitting plate 401 is in the shape of a round funnel, with a large opening at the upper end and a small opening at the lower end.

[0049] When the air pressure in the hole wall reaches a certain pressure, the high-pressure gas will push the rubber ball 601 to move upward away from the first opening 402. The upward movement of the rubber ball 601 will compress the elastic plate 602. The lower opening of the first opening 402 is small and the upper opening is large. When the rubber ball 601 moves upward away from the first opening 402, the high-pressure gas enters the inside of the fitting plate 401. The high-pressure gas inside the fitting plate 401 is discharged from the second opening 403. The lower opening of the second opening 403 is large and the upper opening is small. By setting the rubber ball 601, the pressure inside the hole wall between the fitting plate 401 and the second drill bit 301 can be relieved. When the pressure in the hole wall reaches a certain value, it will automatically relieve the pressure.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A geological survey drilling device, comprising a base (100), wherein the upper end of the base (100) is fixedly connected to a support frame (101), wherein a slide groove (1011) is provided inside the support frame (101), characterized in that: A drilling mechanism (200) for excavating soil layers is arranged at one end of the support frame (101), and the drilling mechanism (200) comprises a first drill bit (207), and an impact mechanism (300) for expanding the hole wall of the drill hole is arranged at the lower end of the first drill bit (207), and a bonding plate (401) is fixedly connected to the surface of the first drill bit (207), and the bonding plate (401) is in the shape of a bucket opening upward, and a sealing mechanism (400) for sealing the hole at the lower end of the bonding plate (401) is arranged at the upper end of the first drill bit (207), and a supporting mechanism (500) for pushing the bonding plate (401) to fit the hole wall is arranged near the sealing mechanism (400) at the upper end of the first drill bit (207), and a pressure relief mechanism (600) for automatically relieving excessive air pressure in the hole at the lower end of the bonding plate (401) is arranged inside the bonding plate (401).

2. A geological survey drilling equipment according to claim 1, characterized in that: The drilling mechanism (200) comprises a first reducer (201), the output end of the first reducer (201) is fixedly connected to a screw rod (202), the surface of the screw rod (202) is meshed with a sliding block (203), and one end of the sliding block (203) is slidably connected to the sliding groove (1011).

3. A geological survey drilling equipment according to claim 2, characterized in that: The drilling mechanism (200) further comprises a second reducer (204), one end of the sliding block (203) is fixedly connected to the second reducer (204), the output end of the second reducer (204) is fixedly connected to a rotating shaft (205), the rotating shaft (205) is rotatably connected to an air intake pipe (206), a first hollow groove (2061) is provided inside the air intake pipe (206), and the lower end of the rotating shaft (205) is fixedly connected to a first drill bit (207).

4. A geological survey drilling equipment according to claim 3, characterized in that: The impact mechanism (300) comprises a second drill bit (301), the upper end of the second drill bit (301) is square, the lower end of the second drill bit (301) is round, the second drill bit (301) is slidably connected to the first drill bit (207), the upper end of the second drill bit (301) is fixedly connected to the air intake pipe (206), a second hollow groove (302) is provided inside the second drill bit (301), a third hollow groove (303) is also provided inside the second drill bit (301), a first exhaust hole (304) is provided on the surface of the second drill bit (301), and a second exhaust hole (305) is provided at the lower end of the second drill bit (301).

5. A geological survey drilling equipment according to claim 4, characterized in that: The sealing mechanism (400) comprises a bonding plate (401), the bonding plate (401) is fixedly connected to the first drill bit (207), and a first opening (402) is provided inside the lower end of the bonding plate (401).

6. A geological survey drilling equipment according to claim 5, characterized in that: The sealing mechanism (400) further comprises a second opening (403), and the second opening (403) is provided inside the upper end of the bonding plate (401).

7. A geological survey drilling equipment according to claim 6, characterized in that: The support mechanism (500) comprises a first sleeve (501), the first sleeve (501) is fixedly connected to the inner surface of the first drill bit (207), a baffle (502) is slidably connected inside the first sleeve (501), a spring (503) is fixedly connected to the upper end of the baffle (502), the upper end of the spring (503) is fixedly connected to the first sleeve (501), a second sleeve (504) is fixedly connected to the upper end of the first sleeve (501), a piston (505) is slidably connected inside the second sleeve (504), and a connecting pipe (506) is fixedly connected to the upper end of the second sleeve (504).

8. The geological survey drilling equipment according to claim 7, characterized in that: The support mechanism (500) further comprises an airbag (507), one end of the connecting tube (506) is fixedly connected to the airbag (507), and the airbag (507) is fixedly connected to the first drill bit (207).

9. A geological survey drilling equipment according to claim 8, characterized in that: The pressure relief mechanism (600) comprises a rubber ball (601), and the surface of the rubber ball (601) is in contact with the surface of the first opening (402).

10. A geological survey drilling equipment according to claim 9, characterized in that: The pressure relief mechanism (600) further comprises an elastic plate (602), the surface of the rubber ball (601) being fixedly connected to the elastic plate (602), and one end of the elastic plate (602) being fixedly connected to the bonding plate (401).

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