An improved pore water formation drilling and stratified sampling device

Abstract

The present invention belongs to the field of groundwater sampling technology, and particularly relates to an improved porous water formation drilling and stratified sampling device, comprising: a power connection part, which is externally connected to a power device; a connection structure, which is fixedly connected to the bottom end of the power connection part; a drilling sampling part, the top end of which is detachably connected to the power connection part through the connection structure, and the drilling sampling part is provided with two annular grooves, both of which are coaxially arranged with the drilling sampling part, and air bags are circumferentially arranged in the annular grooves, and the two air bags and the air bags and the external inflation device are connected through a third inflation connection pipe, and a sampling port of a sampling assembly is arranged between the two air bags, and the sampling assembly is arranged in the drilling sampling part; a drilling part, which is detachably connected to the bottom end of the drilling sampling part. The device of the present invention can realize the integration of drilling sampling, is easy to use, and can isolate the target water layer from other water layers to obtain water samples that meet the requirements.

Description

Technical Field

[0001] The invention belongs to the technical field of groundwater sampling, and in particular relates to an improved porous water stratum drilling and stratified sampling device. Background Art

[0002] The transition zone between groundwater and surface water is the intersection of hydrosphere substances and energy exchange, and is also a key area for maintaining the function of the earth's ecosystem and human survival. It has rich biodiversity and ecological research value. Due to the impact of natural disasters such as domestic sewage, industrial wastewater and seawater intrusion, groundwater pollution and research have received more and more attention. It is very necessary to actively carry out groundwater pollution investigation and control.

[0003] However, most of the groundwater sampling devices on the market are devices such as bailer tubes or submersible pumps, which can only extract mixed groundwater. Before extracting groundwater, it is necessary to dig a well, which is extremely expensive, time-consuming and labor-intensive. Other stratified water extraction devices are more complicated and inconvenient to operate. Summary of the invention

[0004] The object of the present invention is to provide an improved pore water formation drilling and stratified sampling device to solve the above problems.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] An improved pore water formation drilling and stratified sampling device, comprising:

[0007] A power connection part, externally connected to a power device;

[0008] A connecting structure, fixedly connected to the bottom end of the power connecting part;

[0009] The drilling sampling part, the top end of which is detachably connected to the power connection part through the connection structure, is provided with two annular grooves, both of which are coaxially arranged with the drilling sampling part, and an airbag is circumferentially arranged in the annular groove, and the two airbags and the airbag and the external inflation device are connected through a third inflation connection pipe, and a sampling port of a sampling assembly is provided between the two airbags, and the sampling assembly is arranged in the drilling sampling part;

[0010] The drilling part is detachably connected to the bottom end of the drilling sampling part.

[0011] Preferably, the drilling sampling unit comprises:

[0012] a third outer cylinder;

[0013] A third inner cylinder is coaxially arranged in the third outer cylinder, a plurality of third fixing rod groups are fixedly connected between the third outer cylinder and the third inner cylinder at equal intervals from top to bottom, the third fixing rod group includes a plurality of third reinforcement rods, and the plurality of third reinforcement rods are arranged at equal intervals in the circumferential direction;

[0014] The annular groove is circumferentially fixed to the outer side wall of the third inner cylinder, two opposite outer side walls of the annular groove are fixed to the third outer cylinder, and the opening of the annular groove extends out of the third outer cylinder.

[0015] Preferably, the sampling assembly comprises:

[0016] A sampling tube is fixedly connected in the third inner cylinder, a sampling port of the sampling tube passes through the third inner cylinder and the third outer cylinder, and the sampling tube is fixedly connected to the third inner cylinder and the third outer cylinder;

[0017] Two slide plates are respectively slidably connected to one side wall of the two annular grooves, and the two slide plates are slidably connected to the sampling end of the sampling tube. One end of the two slide plates located in the sampling tube is provided with a sampling hole, and the two sampling holes are not connected.

[0018] Two push plates are respectively arranged in the two annular grooves. The two push plates are close to each other, and the sides of the two push plates away from each other abut against the airbag. The push plates are fixedly connected to the slide plate, and a spring is fixedly connected between the push plates and the annular grooves.

[0019] Preferably, the drilling unit comprises:

[0020] A drill bit, arranged at the bottom end of the third outer cylinder;

[0021] A threaded ring, coaxially fixed on the top surface of the drill bit, the threaded ring being threadedly connected to the inner side wall of the third outer cylinder;

[0022] A threaded rod is coaxially fixed to the top of the drill bit, the threaded rod is threadedly connected to the inner wall of the third inner cylinder, a sliding cavity is formed on the outer wall of the threaded rod, and a magnetic block is fixed to the bottom of the sliding cavity;

[0023] The slide cylinder is fixedly connected between the third outer cylinder and the third inner cylinder. A magnetic slider is slidably connected inside the slide cylinder. The magnetic slider passes through a through hole and is magnetically connected to the magnetic suction block. The through hole is opened on the third inner cylinder. The slide cylinder, the sliding cavity and the through hole are adapted to each other.

[0024] Preferably, the power connection part comprises:

[0025] a first outer cylinder;

[0026] A first inner cylinder is coaxially disposed in the first outer cylinder, a plurality of first fixing rod groups are fixedly connected between the first inner cylinder and the first outer cylinder at equal intervals from top to bottom, the first fixing rod group includes a plurality of first reinforcement rods, and the plurality of first reinforcement rods are circumferentially evenly spaced;

[0027] A top plate, fixedly connected between the top ends of the first outer cylinder and the first inner cylinder;

[0028] A first sampling connection tube is fixedly connected in the first inner cylinder, the first sampling connection tube is connected to the sampling tube, the first sampling connection tube is connected to a sampling quick connector, and the sampling quick connector is fixedly connected to the top surface of the top plate;

[0029] A first inflatable connecting pipe is fixedly connected between the first outer cylinder and the first inner cylinder, the first inflatable connecting pipe is connected to the third inflatable connecting pipe, the first inflatable connecting pipe is connected to an inflatable quick connector, and the inflatable quick connector is fixedly connected to the top surface of the top plate;

[0030] A power connection piece is arranged on the top of the top plate and is transmission-connected to an external power device.

[0031] Preferably, the power connection comprises:

[0032] A fixing frame, coaxially fixed to the top of the top plate;

[0033] A connecting sleeve is coaxially fixed to the top end of the fixing frame, and a first screw is threadedly connected to the outer wall of the connecting sleeve, and the first screw passes through the connecting sleeve.

[0034] Preferably, the connection structure comprises:

[0035] A collar, coaxially fixed to the outside of the first outer cylinder, wherein the bottom end of the collar extends out of the bottom end of the first outer cylinder;

[0036] A positioning block is fixedly connected to the inner side wall of the collar, wherein the positioning block is slidably connected in a positioning slideway, and the positioning slideway is provided on the outer side wall of the third outer cylinder;

[0037] A second screw, threadedly connected to the outer wall of the collar, the second screw being threadedly connected to the third outer cylinder;

[0038] A first connecting ring is fixedly connected to the bottom end of the first sampling connecting tube, the top end of the sampling tube is inserted into the first connecting ring, and a first rubber pad is abutted between the first sampling connecting tube and the sampling tube;

[0039] The second connecting ring is fixedly connected to the bottom end of the first inflatable connecting tube, the top end of the third inflatable connecting tube is inserted into the second connecting ring, and a second rubber pad is abutted between the first inflatable connecting tube and the third inflatable connecting tube.

[0040] Preferably, an extension connection portion is further provided between the power connection portion and the drilling and sampling portion, and the extension connection portion is connected to the power connection portion and the drilling and sampling portion through the connection structure;

[0041] The extended connection portion comprises:

[0042] a second outer cylinder;

[0043] A second inner cylinder is coaxially disposed in the second outer cylinder, a plurality of second fixing rod groups are fixedly connected between the second inner cylinder and the second outer cylinder at equal intervals from top to bottom, the second fixing rod groups include a plurality of second reinforcement rods, and the plurality of second reinforcement rods are circumferentially evenly spaced;

[0044] A second sampling connecting tube, fixedly connected in the second inner cylinder, the second sampling connecting tube being connected to the first sampling connecting tube and the sampling tube respectively;

[0045] The second inflatable connecting pipe is fixedly connected between the second outer cylinder and the second inner cylinder, and the second inflatable connecting pipe is communicated with the third inflatable connecting pipe and the first inflatable connecting pipe.

[0046] Compared with the prior art, the present invention has the following advantages and technical effects:

[0047] In the present invention, a power device is connected through a power connection part to provide power for the entire device. The power device drives the drilling part and the drilling sampling part to drill a hole at a predetermined position. After reaching the specified depth, the power device stops working, and the airbag is inflated through an external inflation device. The two airbags are respectively in contact with the hole walls above and below the sampling position to isolate the target water layer from other water layers, and then the external water pump samples the target water layer through the sampling component.

[0048] The device of the present invention can realize the integration of drilling and sampling, is easy to use, and can isolate the target water layer from other water layers to obtain water samples that meet the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0050] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0051] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0052] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0053] Figure 4 for Figure 1 A partial enlarged view of point C in the middle;

[0054] Figure 5 It is a structural schematic diagram of the sampling port in the present invention;

[0055] Figure 6 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention;

[0056] Figure 7 for Figure 6 A partial enlarged view of point D in the middle;

[0057] Among them, 1. power connection part; 2. extension connection part; 3. drilling sampling part; 4. drilling part; 5. connection structure; 101. first outer cylinder; 102. first reinforcement rod; 103. first inner cylinder; 104. first sampling connection pipe; 105. first inflation connection pipe; 106. inflation quick connector; 107. top plate; 108. sampling quick connector; 109. fixing frame; 110. connecting sleeve; 111. first screw; 201. second outer cylinder; 202. second inner cylinder; 203. second reinforcement rod; 204. second sampling connection pipe; 205. second inflation connection pipe; 301. third outer cylinder; 302 , the third inner cylinder; 303, the slide; 304, the magnetic slider; 305, the through hole; 306, the third reinforcement rod; 307, the annular groove; 308, the air bag; 309, the third inflation connecting pipe; 310, the sampling tube; 311, the slide plate; 312, the push plate; 313, the spring; 314, the sampling hole; 401, the drill bit; 402, the threaded ring; 403, the threaded rod; 404, the sliding cavity; 405, the magnetic block; 501, the collar; 502, the positioning block; 503, the positioning slide; 504, the first connecting ring; 505, the first rubber pad; 506, the second connecting ring; 507, the second rubber pad; 508, the second screw. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] Example 1

[0061] Reference Figures 1 to 5 This embodiment discloses an improved porous water formation drilling and stratified sampling device, comprising:

[0062] A power connection part 1, externally connected to a power device;

[0063] A connecting structure 5 is fixedly connected to the bottom end of the power connecting part 1;

[0064] The top of the drilling sampling part 3 is detachably connected to the power connection part 1 through a connection structure 5. Two annular grooves 307 are arranged on the drilling sampling part 3. The two annular grooves 307 are coaxially arranged with the drilling sampling part 3. An airbag 308 is circumferentially arranged in the annular groove 307. The two airbags 308 and the airbag 308 and the external inflation device are connected through a third inflation connection pipe 309. A sampling port of a sampling assembly is arranged between the two airbags 308. The sampling assembly is arranged in the drilling sampling part 3;

[0065] The drilling part 4 is detachably connected to the bottom end of the drilling sampling part 3 .

[0066] In this embodiment, a power device is connected via a power connection part 1 to provide power for the entire device. The power device drives the drilling part 4 and the drilling sampling part 3 to drill a hole at a predetermined position. After reaching the specified depth, the power device stops working, and the airbag 308 is inflated via an external inflation device. The two airbags 308 respectively abut against the hole walls above and below the sampling position to isolate the target water layer from other water layers, and then the external water pump samples the target water layer through the sampling component.

[0067] The device of the present invention can realize the integration of drilling and sampling, is easy to use, and can isolate the target water layer from other water layers to obtain water samples that meet the requirements.

[0068] To further optimize the solution, the drilling sampling part 3 includes:

[0069] The third outer cylinder 301;

[0070] The third inner cylinder 302 is coaxially arranged in the third outer cylinder 301. A plurality of third fixing rod groups are fixedly connected between the third outer cylinder 301 and the third inner cylinder 302 at equal intervals from top to bottom. The third fixing rod groups include a plurality of third reinforcement rods 306. The plurality of third reinforcement rods 306 are arranged at equal intervals in the circumferential direction.

[0071] The annular groove 307 is circumferentially fixed to the outer side wall of the third inner cylinder 302 . Two opposite outer side walls of the annular groove 307 are both fixed to the third outer cylinder 301 . The opening of the annular groove 307 extends out of the third outer cylinder 301 .

[0072] The drilling and sampling part 3 is composed of a third outer cylinder 301 and a third inner cylinder 302 coaxially arranged in the third outer cylinder 301. A plurality of third fixing rod groups are arranged between the third outer cylinder 301 and the third inner cylinder 302 for connecting and fixing the third outer cylinder 301 and the third inner cylinder 302. The axial direction of the third reinforcement rod 306 is parallel to the rotation direction of the drilling and sampling part 3, so that the structure of the drilling and sampling part 3 is more stable.

[0073] To further optimize the solution, the sampling components include:

[0074] The sampling tube 310 is fixedly connected in the third inner cylinder 302. The sampling port of the sampling tube 310 passes through the third inner cylinder 302 and the third outer cylinder 301. The sampling tube 310 is fixedly connected to the third inner cylinder 302 and the third outer cylinder 301.

[0075] Two slide plates 311 are respectively slidably connected to one side wall of the two annular grooves 307. Both slide plates 311 are slidably connected to the sampling end of the sampling tube 310. One end of the two slide plates 311 located in the sampling tube 310 is provided with a sampling hole 314. The two sampling holes 314 are not connected.

[0076] The two push plates 312 are respectively arranged in the two annular grooves 307 . The two push plates 312 are close to each other. The sides of the two push plates 312 that are away from each other abut against the airbag 308 . The push plates 312 are fixedly connected to the slide plate 311 . A spring 313 is fixedly connected between the push plates 312 and the annular grooves 307 .

[0077] The sampling tube 310 is coaxially fixed in the third inner cylinder 302, and the external inflation device inflates the two airbags 308 through the third inflation connecting tube 309. The airbag 308 squeezes the push plate 312. At this time, the spring 313 is compressed, and the two slide plates 311 slide against each other. At this time, the two sampling holes 314 are close to each other. When the airbag 308 is inflated to the maximum extent, the two sampling holes 314 overlap. At this time, the water sample of the target water layer is extracted through the sampling tube 310 by an external water pump. After the sampling is completed, the external inflation device is reversed to pump air, the airbag 308 contracts, and the spring 313 stretches to drive the two sampling holes 314 to separate, and the sampling holes 314 are closed.

[0078] Further optimizing the scheme, the drilling unit 4 includes:

[0079] A drill bit 401 is disposed at the bottom end of the third outer cylinder 301;

[0080] A threaded ring 402 is coaxially fixed on the top surface of the drill bit 401, and the threaded ring 402 is threadedly connected to the inner wall of the third outer cylinder 301;

[0081] The threaded rod 403 is coaxially fixed to the top of the drill bit 401, and the threaded rod 403 is threadedly connected to the inner wall of the third inner cylinder 302. A sliding cavity 404 is formed on the outer wall of the threaded rod 403, and a magnetic block 405 is fixed to the bottom of the sliding cavity 404;

[0082] The slide cylinder 303 is fixed between the third outer cylinder 301 and the third inner cylinder 302. A magnetic slider 304 is slidably connected inside the slide cylinder 303. The magnetic slider 304 passes through the through hole 305 and is magnetically connected to the magnetic suction block 405. The through hole 305 is provided on the third inner cylinder 302. The slide cylinder 303, the sliding cavity 404 and the through hole 305 are adapted to each other.

[0083] The threaded rod 403 is screwed into the bottom end of the third inner cylinder 302, and the threaded ring 402 is screwed into the bottom end of the third outer cylinder 301. When the threaded rod 403 and the threaded ring 402 reach the limit position, the sliding cavity 404 is facing the sliding cylinder 303. The magnetic slider 304 partially enters the sliding cavity 404 under the action of the magnetic suction block 405, and is partially stuck in the through hole 305, thereby fixing the drill bit 401;

[0084] When removing, the magnetic slider 304 is sucked out by the magnet, and the drill bit 401 is rotated in the reverse direction.

[0085] Further optimizing the scheme, the power connection part 1 includes:

[0086] A first outer cylinder 101;

[0087] The first inner cylinder 103 is coaxially arranged in the first outer cylinder 101, and a plurality of first fixing rod groups are fixedly connected between the first inner cylinder 103 and the first outer cylinder 101 at equal intervals from top to bottom, and the first fixing rod group includes a plurality of first reinforcement rods 102, and the plurality of first reinforcement rods 102 are arranged at equal intervals in the circumferential direction;

[0088] A top plate 107 is fixed between the top ends of the first outer cylinder 101 and the first inner cylinder 103;

[0089] The first sampling connecting tube 104 is fixedly connected in the first inner cylinder 103. The first sampling connecting tube 104 is connected to the sampling tube 310. The first sampling connecting tube 104 is connected to a sampling quick connector 108. The sampling quick connector 108 is fixedly connected to the top surface of the top plate 107.

[0090] The first inflatable connecting pipe 105 is fixedly connected between the first outer cylinder 101 and the first inner cylinder 103, the first inflatable connecting pipe 105 is connected to the third inflatable connecting pipe 309, the first inflatable connecting pipe 105 is connected to the inflatable quick connector 106, and the inflatable quick connector 106 is fixedly connected to the top surface of the top plate 107;

[0091] The power connection piece is arranged at the top of the top plate 107 and is transmission-connected to the external power device.

[0092] Further optimization scheme, the power connector includes:

[0093] A fixing frame 109 is coaxially fixed to the top of the top plate 107;

[0094] The connecting sleeve 110 is coaxially fixed to the top of the fixing frame 109 . A first screw 111 is threadedly connected to the outer wall of the connecting sleeve 110 . The first screw 111 passes through the connecting sleeve 110 .

[0095] The output shaft of the power device is inserted into the connecting sleeve 110, and then the first screw 111 is tightened. The first screw 111 abuts against the output shaft of the power device to fix the power device to the fixing frame 109, and the connection is completed;

[0096] Further optimizing the solution, the connection structure 5 includes:

[0097] The collar 501 is coaxially fixed to the outside of the first outer cylinder 101, and the bottom end of the collar 501 extends out of the bottom end of the first outer cylinder 101;

[0098] The positioning block 502 is fixedly connected to the inner wall of the collar 501. The positioning block 502 is slidably connected in the positioning slideway 503. The positioning slideway 503 is provided on the outer wall of the third outer cylinder 301.

[0099] A second screw 508 is threadedly connected to the outer wall of the collar 501 , and the second screw 508 is threadedly connected to the third outer cylinder 301 ;

[0100] A first connecting ring 504 is fixedly connected to the bottom end of the first sampling connecting tube 104. The top end of the sampling tube 310 is inserted into the first connecting ring 504. A first rubber pad 505 is abutted between the first sampling connecting tube 104 and the sampling tube 310.

[0101] The second connecting ring 506 is fixedly connected to the bottom end of the first inflatable connecting tube 105 . The top end of the third inflatable connecting tube 309 is inserted into the second connecting ring 506 . A second rubber pad 507 is abutted between the first inflatable connecting tube 105 and the third inflatable connecting tube 309 .

[0102] The purpose of the first rubber pad 505 is to increase the sealing between the first sampling connecting tube 104 and the sampling tube 310 , and the purpose of the second rubber pad 507 is to increase the sealing between the first inflation connecting tube 105 and the third inflation connecting tube 309 .

[0103] The top end of the third outer cylinder 301 is inserted into the ring 501 and positioned by the cooperation between the positioning block 502 and the positioning slide 503, so as to facilitate the connection between the sampling tube 310 and the first sampling connecting tube 104, and the first inflation connecting tube 105 and the third inflation connecting tube 309.

[0104] Example 2

[0105] Reference Figure 6 to Figure 7 , which is different from Example 1 in that, in this embodiment, an extension connection part 2 is further provided between the power connection part 1 and the drilling sampling part 3, and the extension connection part 2 is connected to the power connection part 1 and the drilling sampling part 3 through a connection structure 5;

[0106] The extended connection portion 2 comprises:

[0107] A second outer cylinder 201;

[0108] The second inner cylinder 202 is coaxially arranged in the second outer cylinder 201. A plurality of second fixing rod groups are fixedly connected between the second inner cylinder 202 and the second outer cylinder 201 at equal intervals from top to bottom. The second fixing rod groups include a plurality of second reinforcement rods 203. The plurality of second reinforcement rods 203 are arranged at equal intervals in the circumferential direction.

[0109] The second sampling connecting tube 204 is fixedly connected in the second inner cylinder 202, and the second sampling connecting tube 204 is connected with the first sampling connecting tube 104 and the sampling tube 310 respectively;

[0110] The second inflatable connecting pipe 205 is fixedly connected between the second outer cylinder 201 and the second inner cylinder 202 , and the second inflatable connecting pipe 205 is in communication with the third inflatable connecting pipe 309 and the first inflatable connecting pipe 105 .

[0111] The extended connection portion 2 is provided so that the length of the device can be adjusted according to usage requirements.

[0112] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0113] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An improved porous water formation drilling and stratified sampling device, characterized in that: include: A power connection part (1) externally connected to a power device; A connecting structure (5) fixedly connected to the bottom end of the power connecting portion (1); A drilling sampling portion (3), the top end of which is detachably connected to the power connection portion (1) via the connection structure (5), the drilling sampling portion (3) being provided with two annular grooves (307), the two annular grooves (307) being coaxially arranged with the drilling sampling portion (3), an air bag (308) being circumferentially arranged in the annular groove (307), the two air bags (308) and the air bags (308) being connected to an external inflation device via a third inflation connection pipe (309), a sampling port of a sampling assembly being provided between the two air bags (308), and the sampling assembly being arranged in the drilling sampling portion (3); A drilling portion (4) detachably connected to the bottom end of the drilling and sampling portion (3); The drilling and sampling part (3) comprises: A third outer cylinder (301); A third inner cylinder (302) is coaxially arranged inside the third outer cylinder (301), a plurality of third fixing rod groups are fixedly connected between the third outer cylinder (301) and the third inner cylinder (302) at equal intervals from top to bottom, the third fixing rod groups comprising a plurality of third reinforcement rods (306), and the plurality of third reinforcement rods (306) are arranged at equal intervals in the circumferential direction; The annular groove (307) is circumferentially fixed to the outer side wall of the third inner cylinder (302); two opposite outer side walls of the annular groove (307) are both fixed to the third outer cylinder (301); and an opening of the annular groove (307) extends out of the third outer cylinder (301); The drilling part (4) comprises: A drill bit (401) is arranged at the bottom end of the third outer cylinder (301); A threaded ring (402) is coaxially fixed on the top surface of the drill bit (401), and the threaded ring (402) is threadedly connected to the inner wall of the third outer cylinder (301); A threaded rod (403) is coaxially fixed to the top of the drill bit (401), the threaded rod (403) is threadedly connected to the inner wall of the third inner cylinder (302), a sliding cavity (404) is provided on the outer wall of the threaded rod (403), and a magnetic attraction block (405) is fixed to the bottom of the sliding cavity (404); The slide cylinder (303) is fixedly connected between the third outer cylinder (301) and the third inner cylinder (302); a magnetic slider (304) is slidably connected inside the slide cylinder (303); the magnetic slider (304) passes through a through hole (305) and is magnetically connected to the magnetic suction block (405); the through hole (305) is provided on the third inner cylinder (302); the slide cylinder (303), the sliding cavity (404) and the through hole (305) are adapted to each other.

2. An improved porous water formation drilling and stratified sampling device according to claim 1, characterized in that: The sampling assembly comprises: a sampling tube (310) fixedly connected inside the third inner cylinder (302); a sampling port of the sampling tube (310) passing through the third inner cylinder (302) and the third outer cylinder (301); and the sampling tube (310) is fixedly connected to the third inner cylinder (302) and the third outer cylinder (301); The two slide plates (311) are respectively slidably connected to one side wall of the two annular grooves (307), and the two slide plates (311) are both slidably connected to the sampling end of the sampling tube (310). The two ends of the two slide plates (311) located in the sampling tube (310) are each provided with a sampling hole (314), and the two sampling holes (314) are not connected to each other; The two push plates (312) are respectively arranged in the two annular grooves (307). The two push plates (312) are close to each other. The sides of the two push plates (312) that are away from each other abut against the airbag (308). The push plates (312) are fixedly connected to the slide plate (311). A spring (313) is fixedly connected between the push plates (312) and the annular grooves (307).

3. An improved porous water formation drilling and stratified sampling device according to claim 2, characterized in that: The power connection part (1) comprises: A first outer cylinder (101); A first inner cylinder (103) is coaxially arranged inside the first outer cylinder (101), a plurality of first fixing rod groups are fixedly connected between the first inner cylinder (103) and the first outer cylinder (101) at equal intervals from top to bottom, the first fixing rod groups comprising a plurality of first reinforcement rods (102), the plurality of first reinforcement rods (102) being arranged at equal intervals in the circumferential direction; A top plate (107) fixedly connected between the top ends of the first outer cylinder (101) and the first inner cylinder (103); A first sampling connection tube (104) is fixedly connected in the first inner cylinder (103), the first sampling connection tube (104) is in communication with the sampling tube (310), the first sampling connection tube (104) is in communication with a sampling quick connector (108), and the sampling quick connector (108) is fixedly connected to the top surface of the top plate (107); a first inflatable connecting pipe (105) fixedly connected between the first outer cylinder (101) and the first inner cylinder (103), the first inflatable connecting pipe (105) being in communication with the third inflatable connecting pipe (309), the first inflatable connecting pipe (105) being in communication with an inflatable quick connector (106), the inflatable quick connector (106) being fixedly connected to the top surface of the top plate (107); A power connection piece is arranged on the top of the top plate (107) and is transmission-connected to an external power device.

4. An improved porous water formation drilling and stratified sampling device according to claim 3, characterized in that: The power connection member comprises: A fixing frame (109) coaxially fixed to the top of the top plate (107); A connecting sleeve (110) is coaxially fixed to the top end of the fixing frame (109), and a first screw (111) is threadedly connected to the outer wall of the connecting sleeve (110), and the first screw (111) passes through the connecting sleeve (110).

5. An improved porous water formation drilling and stratified sampling device according to claim 3, characterized in that: The connection structure (5) comprises: A collar (501) is coaxially fixedly connected to the outside of the first outer cylinder (101), and the bottom end of the collar (501) extends out of the bottom end of the first outer cylinder (101); A positioning block (502) is fixedly connected to the inner wall of the collar (501), the positioning block (502) is slidably connected in a positioning slideway (503), and the positioning slideway (503) is provided on the outer wall of the third outer cylinder (301); A second screw (508) is threadedly connected to the outer wall of the collar (501), and the second screw (508) is threadedly connected to the third outer cylinder (301); A first connecting ring (504) is fixedly connected to the bottom end of the first sampling connecting tube (104); the top end of the sampling tube (310) is inserted into the first connecting ring (504); and a first rubber pad (505) is abutted between the first sampling connecting tube (104) and the sampling tube (310); The second connecting ring (506) is fixedly connected to the bottom end of the first inflatable connecting tube (105), the top end of the third inflatable connecting tube (309) is inserted into the second connecting ring (506), and a second rubber pad (507) is abutted between the first inflatable connecting tube (105) and the third inflatable connecting tube (309).

6. An improved porous water formation drilling and stratified sampling device according to claim 3, characterized in that: An extension connection portion (2) is further provided between the power connection portion (1) and the drilling and sampling portion (3), and the extension connection portion (2) is connected to the power connection portion (1) and the drilling and sampling portion (3) via the connection structure (5); The extended connection portion (2) comprises: A second outer cylinder (201); A second inner cylinder (202) is coaxially arranged inside the second outer cylinder (201), a plurality of second fixing rod groups are fixedly connected between the second inner cylinder (202) and the second outer cylinder (201) at equal intervals from top to bottom, the second fixing rod groups comprising a plurality of second reinforcement rods (203), and the plurality of second reinforcement rods (203) are arranged at equal intervals in the circumferential direction; A second sampling connecting tube (204) is fixedly connected in the second inner cylinder (202), and the second sampling connecting tube (204) is respectively connected to the first sampling connecting tube (104) and the sampling tube (310); The second inflatable connecting pipe (205) is fixedly connected between the second outer cylinder (201) and the second inner cylinder (202), and the second inflatable connecting pipe (205) is in communication with the third inflatable connecting pipe (309) and the first inflatable connecting pipe (105).

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