Sampling device for mineral geological exploration

Abstract

The invention belongs to the technical field of mineral geological exploration, and discloses a sampling device for mineral geological exploration, which comprises a working plate, one side of the working plate is fixedly provided with a material distribution plate, the upper surface of the working plate is provided with a rotary central column, and the lower surface of the working plate is internally and fixedly provided with a switching motor. A displacement motor is fixedly installed at the upper end of the central column, a displacement rod is fixedly connected to the lower end of an output shaft of the displacement motor, a clamping mechanism is arranged at the upper end of the drilling barrel, and sampling materials are clamped to achieve taking and transferring of the materials. According to the sampling device for mineral geological exploration, the clamping mechanism for clamping a sampled sample is arranged on the inner side of the drilling barrel, so that the sample can be taken away from the ground along with the ascending of the drilling barrel after being taken, and the sample can be conveniently transferred and taken; the influence on subsequent analysis caused by wrong mixing of samples at different depths due to sample breakage in the material taking process is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of mineral geological exploration, in particular to a sampling device for mineral geological exploration. Background Art

[0002] The exploration of mineral resources is crucial to the country's economic development and industrial construction. In the process of mineral geological exploration, accurately obtaining representative samples is the basis for subsequent analysis and research. At present, there are a variety of sampling devices for mineral geological exploration on the market. Traditional sampling devices can be inserted into geological layers to obtain samples more effectively during the sampling process. However, these existing sampling devices generally have a major disadvantage, that is, they cannot conveniently remove and divide the sampled samples. When the sampling is completed, due to the limitations of the structural design, it is often difficult for the staff to smoothly remove the samples from the sampling device, which not only increases the difficulty and time cost of the operation, but may also cause damage to the samples during the process of removing the samples, affecting the integrity and accuracy of the samples. At the same time, the inability to divide the samples also brings inconvenience to the subsequent analysis work. In some cases, samples at different depths or in different areas need to be analyzed separately, and the existing sampling devices cannot meet this demand, making the analysis work complicated and inefficient. Summary of the invention

[0003] The object of the present invention is to provide a sampling device for mineral geological exploration to solve the problem of difficulty in taking and dividing materials after sampling is completed as mentioned in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sampling device for mineral geological exploration, comprising a working plate, a dividing plate is fixedly arranged on one side of the working plate, a rotating central column is installed on the upper surface of the working plate, and a switching motor is fixedly installed inside the lower surface of the working plate, a displacement motor is fixedly installed on the upper end of the central column, and a displacement rod is fixedly connected to the lower end of the output shaft of the displacement motor, a sliding displacement frame is installed on the outer surface of the central column, and a rotating drill barrel is installed on the lower end of the displacement frame, and drill teeth are fixedly arranged on the lower surface of the drill barrel, a driving motor is fixedly installed on the upper surface of the displacement frame, a laser pen is fixedly arranged on the outer surface of the central column, and a clamping mechanism is arranged on the upper end of the drill barrel, which realizes material collection and transfer by clamping the sampled material.

[0005] Preferably, the clamping mechanism comprises: a first electric push rod, which is fixedly arranged on the inner surface of one end of the displacement frame, and the lower end of the first electric push rod is fixedly connected to a squeezing plate, a piston cylinder is fixedly arranged on the upper end side surface of the drill barrel, and one end of the piston rod is arranged inside the piston cylinder, a clamping airbag is fixedly arranged on the inner surface of the drill barrel, and a guide tube is opened inside the side surface of the drill barrel, a sliding squeezing ring is installed on the inner surface of the upper end of the drill barrel, and a second electric push rod is fixedly installed inside the upper end of the drill barrel, and the second electric push rod has a built-in battery, an squeezing block is fixedly arranged on the lower surface of the squeezing ring, a rotating squeezing disk is installed on the upper surface of the dividing plate, and a dividing barrel is fixedly arranged on the upper surface of the dividing disk, a transposition motor is fixedly arranged on the side surface of the working plate, and a material changing gear is fixedly connected to the lower end of the output shaft of the transposition motor.

[0006] By adopting the above technical solution, the cut stone sample can be shaken and broken and then clamped and taken out as the drill tube rises.

[0007] Preferably, the upper end of the output shaft of the switching motor is fixedly connected to the rotating shaft of the center column, the displacement rod is threadedly connected to the displacement frame, and the lower end of the output shaft of the driving motor is fixedly connected to the rotating shaft of the drill barrel.

[0008] By adopting the above technical solution, the displacement rod can drive the displacement frame and the drill tube to move up and down to perform sampling and material discharge through rotation.

[0009] Preferably, the lower surface of the extrusion plate fits with the upper end of the piston rod, and the piston rod and the piston cylinder are connected by sliding friction, and a spring is connected between the piston rod and the piston cylinder.

[0010] By adopting the above technical solution, the sliding of the piston rod can inject the air in the piston cylinder into the clamping airbag through the guide tube, so that the clamping airbag expands to clamp the columnar stone.

[0011] Preferably, the upper end of the guide tube passes through the lower end side surface of the piston cylinder, and the lower end of the guide tube passes through the side surface of the clamping airbag.

[0012] By adopting the above technical solution, the clamping airbag can be connected to the piston cylinder through the guide tube.

[0013] Preferably, a spring is connected between the extrusion ring and the drill tube, the lower end of the second electric push rod faces the upper surface of the extrusion ring, and the lower end of the extrusion block is designed to be arc-shaped.

[0014] By adopting the above technical solution, the extrusion ring can be reset under the pull of the spring when not pushed.

[0015] Preferably, the outer surface of the distribution plate is evenly provided with tooth blocks, and the distribution plate is meshed and connected with the material changing gear through the tooth blocks.

[0016] By adopting the above technical solution, the material distribution plate can be driven to rotate by the material changing gear.

[0017] Preferably, the upper end surface of the material distribution barrel is flush with the upper end surface of the working plate, and a clearance groove is provided on the side surface of the material distribution barrel, and a hemispherical protrusion is provided on the inner bottom surface of the material distribution barrel.

[0018] By adopting the above technical solution, the staff can conveniently take out the sample inside the dispensing barrel through the clearance groove.

[0019] Preferably, a sliding closing cylinder is installed inside the lower end of the working plate, and a grounding ring is fixedly provided on the lower surface of the closing cylinder, a sliding block is installed on the inner surface of the lower end of the working plate, a connecting groove is opened inside the side surface of the lower end of the working plate, and a connecting head is fixedly provided on the outer surface of the lower end of the working plate.

[0020] By adopting the above technical solution, the connector can be connected to the suction equipment to suck and discharge the dust.

[0021] Preferably, the closing cylinder is located directly below the drill cylinder, and a groove is provided on the upper side surface of the closing cylinder, the grounding ring is a truncated cone-shaped design made of rubber material, the block is connected to the working plate by sliding friction, and a spring is connected between the block and the working plate, the end of the block facing the closing cylinder is a right-angled trapezoidal design, and the inclined surface of the block is downwardly facing the groove on the upper side surface of the closing cylinder, and the block is engaged and installed with the closing cylinder through the groove on the upper side surface of the closing cylinder, the connecting groove is a T-shaped design, and the upper end of the connecting groove passes through the internal cavity of the working plate where the block is located, and the lower end of the connecting groove respectively passes through the inner and outer surfaces of the lower end of the working plate, one end of the connecting groove passing through the outer surface of the lower end of the working plate is connected to the connecting head, and one end of the connecting groove passing through the inner surface of the lower end of the working plate is fitted with the outer surface of the closing cylinder.

[0022] By adopting the above technical solution, the sealing tube can automatically fall downward and fit the ground through the grounding ring when the suction device is connected for suction.

[0023] Compared with the prior art, the invention has the following beneficial effects: the sampling device for mineral geological exploration: 1. A clamping mechanism is set inside the drill tube to hold the sample after sampling, so that the sample can be taken away from the ground together with the rise of the drill tube after sampling is completed, so as to facilitate the transfer and sampling of the sample and avoid the sample breaking during the sampling process, which will cause the samples at different depths to mix and affect the subsequent analysis; Furthermore, after sampling is completed, the extrusion ring slides down and alternately squeezes the upper side surface of the rock sample, so that the columnar rock sample separated from the surrounding stone by the drill teeth can be separated from the stone as a whole at the lower end by shaking, thereby avoiding the situation where the drill teeth cannot completely cut the lower end of the rock columnar sample and thus cannot be sampled; Furthermore, after the rock columnar sample is taken out, it is driven to rotate above the dividing plate, and the relative displacement between the dividing cylinder and the lower end of the drill cylinder is utilized so that the rock columnar sample can be fractured and separated according to a certain length, thereby conveniently dividing the rock columnar sample according to different depths; 2. The drill teeth are used to contact and seal the ground cutting area during the rotation process, so that the dust and gravel generated during the cutting and sampling process will not be scattered into the air, thereby reducing the impact of dust and gravel on operators and improving the safety of the working process; Furthermore, by connecting a suction device to the connecting head, the closed tube can be automatically lowered during the suction process, and the contact between the rubber grounding ring and the ground ensures the dust adsorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the central column and the laser pen connected to the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the connection section of the working plate, the sealing cylinder and the grounding ring of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the connection section of the drill tube, the extrusion ring and the second electric push rod of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the connection between the extrusion ring and the second electric push rod of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the connection section of the sealing cylinder, the grounding ring and the clamping block of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the connection section of the drill pipe, the clamping air bag and the guide tube of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the connection section of the piston cylinder, the piston rod and the guide tube of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the overall working state of the present invention.

[0025] In the figure: 1. working plate; 2. material distribution plate; 3. center column; 4. switching motor; 5. displacement motor; 6. displacement rod; 7. displacement frame; 8. drill tube; 9. drill teeth; 10. driving motor; 11. first electric push rod; 12. extrusion plate; 13. piston cylinder; 14. piston rod; 15. clamping airbag; 16. guide tube; 17. extrusion ring; 18. second electric push rod; 19. extrusion block; 20. laser pen; 21. material distribution plate; 22. material distribution cylinder; 23. transposition motor; 24. material changing gear; 25. closing cylinder; 26. grounding ring; 27. block; 28. connecting groove; 29. ​​connector. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1-Figure 9 The present invention provides a technical solution: a sampling device for mineral geological exploration.

[0028] Embodiment 1: This embodiment discloses a working plate 1, a material dividing plate 2 is fixedly provided on one side of the working plate 1, a rotating central column 3 is installed on the upper surface of the working plate 1, and a switching motor 4 is fixedly installed inside the lower surface of the working plate 1, a displacement motor 5 is fixedly installed on the upper end of the central column 3, and a displacement rod 6 is fixedly connected to the lower end of the output shaft of the displacement motor 5, a sliding displacement frame 7 is installed on the outer surface of the central column 3, and a rotating drill tube 8 is installed on the lower end of the displacement frame 7, and a drill tooth 9 is fixedly provided on the lower surface of the drill tube 8, a driving motor 10 is fixedly installed on the upper surface of the displacement frame 7, and a laser pen 20 is fixedly provided on the outer surface of the central column 3; The upper end of the output shaft of the switching motor 4 is fixedly connected to the rotating shaft of the central column 3, the displacement rod 6 is threadedly connected to the displacement frame 7, and the lower end of the output shaft of the driving motor 10 is fixedly connected to the rotating shaft of the drill tube 8; During normal operation, the working plate 1 and the dividing plate 2 are first placed in predetermined positions, such as Fig. 9 At this time, the laser pen 20 irradiates downward to the ground to mark the ground position to be sampled, and then the switching motor 4 is started to drive the central column 3 to rotate so that the drill tube 8 rotates to above the sampling position. At this time, the driving motor 10 is started to drive the drill tube 8 and the drill teeth 9 to rotate, and then the displacement motor 5 is started to drive the displacement rod 6 to rotate. The displacement rod 6 drives the displacement frame 7 to slide down relative to the central column 3 through the threaded connection with the displacement frame 7, and the displacement frame 7 drives the drill tube 8 to move downward to cut the ground to be sampled through the drill teeth 9; Embodiment 2: Based on Embodiment 1, this embodiment discloses that a material clamping mechanism is provided at the upper end of the drill tube 8, and the material is taken and transferred by clamping the sampled material; The clamping mechanism comprises: a first electric push rod 11, which is fixedly arranged on the inner side surface of one end of the displacement frame 7, and the lower end of the first electric push rod 11 is fixedly connected with an extrusion plate 12, a piston cylinder 13 is fixedly arranged on the upper side surface of the drill tube 8, and one end of the piston rod 14 is arranged inside the piston cylinder 13, a clamping airbag 15 is fixedly arranged on the inner side surface of the drill tube 8, and a guide tube 16 is opened inside the side surface of the drill tube 8, a sliding extrusion ring 17 is installed on the inner side surface of the upper end of the drill tube 8, and a second electric push rod 18 is fixedly installed inside the upper end of the drill tube 8, and the second electric push rod 18 has a built-in battery, an extrusion block 19 is fixedly arranged on the lower surface of the extrusion ring 17, a rotating material distribution disc 21 is installed on the upper surface of the material distribution plate 2, and a material distribution barrel 22 is fixedly arranged on the upper surface of the material distribution disc 21, a transposition motor 23 is fixedly installed on the side surface of the working plate 1, and a material changing gear 24 is fixedly connected to the lower end of the output shaft of the transposition motor 23; The lower surface of the extrusion plate 12 fits with the upper end of the piston rod 14, and the piston rod 14 and the piston cylinder 13 are connected by sliding friction, and a spring is connected between the piston rod 14 and the piston cylinder 13; The upper end of the flow guide tube 16 penetrates the lower end side surface of the piston cylinder 13, and the lower end of the flow guide tube 16 penetrates the side surface of the clamping airbag 15; A spring is connected between the extrusion ring 17 and the drill tube 8, the lower end of the second electric push rod 18 is directly opposite to the upper surface of the extrusion ring 17, and the lower end of the extrusion block 19 is designed to be arc-shaped; The outer surface of the material distribution plate 21 is evenly provided with tooth blocks, and the material distribution plate 21 is meshed and connected with the material changing gear 24 through the tooth blocks; The upper end surface of the material distribution barrel 22 is flush with the upper end surface of the working plate 1, and a clearance groove is provided on the side surface of the material distribution barrel 22, and a hemispherical protrusion is provided on the inner bottom surface of the material distribution barrel 22; When the drill tube 8 is completely moved downward, the second electric push rod 18 is started, and the second electric push rod 18 pushes the extrusion ring 17 so that the extrusion ring 17 squeezes the upper end side surface of the columnar stone through the arc surface of the extrusion block 19, and then the second electric push rod 18 releases the push on the extrusion ring 17, and the extrusion ring 17 releases the extrusion of the stone column, and then the driving motor 10 drives the drill tube 8 to rotate a certain angle, and then repeats the above-mentioned second electric push rod 18 pushing the extrusion ring 17 and the driving motor 10 driving the drill tube 8 to rotate a certain angle until the lower end of the columnar stone breaks and is disconnected from the ground, at this time, the first electric push rod 11 is started to squeeze the upper end of the piston rod 14 through the extrusion plate 12, and the piston rod 14 compresses the air in the piston cylinder 13 so that the air is compressed and injected into the clamping airbag 15 through the guide tube 16, and the clamping airbag 15 expands and contacts with the columnar stone to clamp the stone; After the sampling is completed, the displacement motor 5 drives the displacement frame 7 and the drill tube 8 to slide upward through the displacement rod 6 so that the stone is driven out, and then the switching motor 4 drives the central column 3 to rotate so that the drill tube 8 moves to the upper surface of the distribution barrel 22 of the distribution plate 21. At this time, the first electric push rod 11 drives the extrusion plate 12 to move upward to release the extrusion of the piston rod 14. The piston rod 14 slides upward under the support of the spring between the piston cylinder 13, so that the clamping airbag 15 loses pressure and releases the clamping of the columnar stone. The columnar stone falls downward into the distribution barrel 22. At this time, the transposition motor 23 The material distribution plate 21 is driven to rotate by the material changing gear 24, so that the lower end of the stone column located in the material distribution barrel 22 is squeezed and broken by contact with the drill teeth 9 at the lower end of the drill tube 8, and then the first electric push rod 11 is started to slide down through the extrusion plate 12 to make the clamping airbag 15 resume expansion and press the stone column, and then the material distribution plate 21 is driven to rotate until the other material distribution barrel 22 moves to the bottom of the drill tube 8, and the broken stone column in the material distribution barrel 22 that is turned away from the drill tube 8 is taken out and collected, and the sampling and segmented material extraction of the stone column are completed in the continuous repetition of the above process.

[0029] Embodiment 3: Based on Embodiment 1 and Embodiment 2, this embodiment discloses that a sliding closing cylinder 25 is installed inside the lower end of the working plate 1, and a grounding ring 26 is fixedly provided on the lower surface of the closing cylinder 25, a sliding block 27 is installed on the inner surface of the lower end of the working plate 1, and a connecting groove 28 is opened inside the side surface of the lower end of the working plate 1, and a connector 29 is fixedly provided on the outer surface of the lower end of the working plate 1; The closing cylinder 25 is located directly below the drill cylinder 8, and a groove is provided on the upper side surface of the closing cylinder 25. The grounding ring 26 is a truncated cone-shaped design made of rubber material. The block 27 is connected to the working plate 1 by sliding friction, and a spring is connected between the block 27 and the working plate 1. The end of the block 27 facing the closing cylinder 25 is a right-angled trapezoidal design, and the inclined surface of the block 27 faces downwardly toward the groove on the upper side surface of the closing cylinder 25, and the block 27 is clamped and installed with the closing cylinder 25 through the groove on the upper side surface of the closing cylinder 25. The connecting groove 28 is a T-shaped design, and the upper end of the connecting groove 28 passes through the internal cavity of the working plate 1 where the block 27 is located, and the lower end of the connecting groove 28 passes through the inner and outer surfaces of the lower end of the working plate 1 respectively, and one end of the connecting groove 28 passing through the outer surface of the lower end of the working plate 1 is connected to the connector 29, and one end of the connecting groove 28 passing through the inner surface of the lower end of the working plate 1 is in contact with the outer surface of the closing cylinder 25; Before sampling, first connect it to the suction equipment through the connector 29, and then start the suction equipment to suck the connecting groove 28. At this time, since the lower end of the connecting groove 28 is sealed by the side surface of the closing cylinder 25, the interior of the connecting groove 28 is in a negative pressure state, so that the blocking block 27 is sucked by the negative pressure and slides out of the engagement with the closing cylinder 25. At this time, the closing cylinder 25 slides down relative to the working plate 1 under the action of gravity and fits with the ground through the grounding ring 26. At this time, the upper end of the closing cylinder 25 is located below one end of the inner surface of the lower end of the working plate 1 through the connecting groove 28, so that the suction equipment can suck the inside of the closing cylinder 25 through the connecting groove 28 to prevent a large amount of dust from escaping.

[0030] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. A sampling device for mineral geological exploration, comprising a working plate (1), a material dividing plate (2) being fixedly arranged on one side of the working plate (1), characterized in that: A rotating central column (3) is mounted on the upper surface of the working plate (1), and a switching motor (4) is fixedly mounted inside the lower surface of the working plate (1); a displacement motor (5) is fixedly mounted on the upper end of the central column (3), and a displacement rod (6) is fixedly connected to the lower end of the output shaft of the displacement motor (5); a sliding displacement frame (7) is mounted on the outer surface of the central column (3), and a rotating drill tube (8) is mounted on the lower end of the displacement frame (7); drill teeth (9) are fixedly arranged on the lower surface of the drill tube (8); a driving motor (10) is fixedly mounted on the upper surface of the displacement frame (7); a laser pen (20) is fixedly arranged on the outer surface of the central column (3), and a material clamping mechanism is arranged on the upper end of the drill tube (8), so as to realize material collection and transfer by clamping the sampled material.

2. A sampling device for mineral geological exploration according to claim 1, characterized in that: The material clamping mechanism comprises: a first electric push rod (11), the first electric push rod (11) being fixedly arranged on the inner side surface of one end of the displacement frame (7), and the lower end of the first electric push rod (11) being fixedly connected to a squeezing plate (12), a piston cylinder (13) being fixedly arranged on the upper side surface of the drill cylinder (8), and one end of a piston rod (14) being arranged inside the piston cylinder (13), a clamping air bag (15) being fixedly arranged on the inner side surface of the drill cylinder (8), and a guide tube (16) being provided inside the side surface of the drill cylinder (8), and the inner side surface of the upper end of the drill cylinder (8) being fixedly arranged on the inner side surface of the drill cylinder (8). A sliding extrusion ring (17) is installed on the surface, and a second electric push rod (18) is fixedly installed inside the upper end of the drill tube (8), and the second electric push rod (18) has a built-in storage battery. An extrusion block (19) is fixedly arranged on the lower surface of the extrusion ring (17). A rotating material distribution disc (21) is installed on the upper surface of the material distribution plate (2), and a material distribution barrel (22) is fixedly arranged on the upper surface of the material distribution disc (21). A transposition motor (23) is fixedly installed on the side surface of the working plate (1), and a material change gear (24) is fixedly connected to the lower end of the output shaft of the transposition motor (23).

3. A sampling device for mineral geological exploration according to claim 1, characterized in that: The upper end of the output shaft of the switching motor (4) is fixedly connected to the rotating shaft of the central column (3), the displacement rod (6) is threadedly connected to the displacement frame (7), and the lower end of the output shaft of the driving motor (10) is fixedly connected to the rotating shaft of the drill tube (8).

4. A sampling device for mineral geological exploration according to claim 2, characterized in that: The lower surface of the extrusion plate (12) fits the upper end of the piston rod (14), the piston rod (14) and the piston cylinder (13) are connected by sliding friction, and a spring is connected between the piston rod (14) and the piston cylinder (13).

5. A sampling device for mineral geological exploration according to claim 2, characterized in that: The upper end of the flow guide tube (16) penetrates the lower end side surface of the piston cylinder (13), and the lower end of the flow guide tube (16) penetrates the side surface of the clamping airbag (15).

6. A sampling device for mineral geological exploration according to claim 2, characterized in that: A spring is connected between the extrusion ring (17) and the drill tube (8); the lower end of the second electric push rod (18) faces the upper surface of the extrusion ring (17); and the lower end of the extrusion block (19) is of arc-shaped design.

7. A sampling device for mineral geological exploration according to claim 2, characterized in that: The outer surface of the material distribution plate (21) is evenly provided with tooth blocks, and the material distribution plate (21) is meshedly connected with the material changing gear (24) via the tooth blocks.

8. The sampling device for mineral geological exploration according to claim 2, characterized in that: The upper end surface of the material distribution barrel (22) is flush with the upper end surface of the working plate (1), a clearance groove is provided on the side surface of the material distribution barrel (22), and a hemispherical protrusion is provided on the inner bottom surface of the material distribution barrel (22).

9. The sampling device for mineral geological exploration according to claim 1, characterized in that: A sliding sealing cylinder (25) is installed inside the lower end of the working plate (1), and a grounding ring (26) is fixedly provided on the lower surface of the sealing cylinder (25); a sliding clamping block (27) is installed on the inner surface of the lower end of the working plate (1), and a connecting groove (28) is provided inside the side surface of the lower end of the working plate (1), and a connecting head (29) is fixedly provided on the outer surface of the lower end of the working plate (1).

10. A sampling device for mineral geological exploration according to claim 9, characterized in that: The sealing cylinder (25) is located directly below the drill cylinder (8), and a groove is formed on the upper side surface of the sealing cylinder (25). The grounding ring (26) is designed in a truncated cone shape and is made of rubber material. The clamping block (27) is connected to the working plate (1) by sliding friction, and a spring is connected between the clamping block (27) and the working plate (1). The end of the clamping block (27) facing the sealing cylinder (25) is designed in a right-angle trapezoidal shape, and the inclined surface of the clamping block (27) faces downwardly toward the groove on the upper side surface of the sealing cylinder (25). The clamping block (27) passes through the sealing cylinder (2 5) The groove on the upper side surface is engaged with the closed cylinder (25), the connecting groove (28) is T-shaped, and the upper end of the connecting groove (28) passes through the internal cavity of the working plate (1) where the block (27) is located, and the lower end of the connecting groove (28) passes through the inner and outer surfaces of the lower end of the working plate (1), respectively; one end of the connecting groove (28) passing through the outer surface of the lower end of the working plate (1) is connected to the connecting head (29), and one end of the connecting groove (28) passing through the inner surface of the lower end of the working plate (1) is in contact with the outer surface of the closed cylinder (25).

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