Sampler for salt lake drilling

Abstract

A sampler for salt lake drilling comprises an outer drill rod, a connecting cover is arranged at the top of the outer drill rod, and a pressurizing hole is formed in the connecting cover; the inner drill rod is slidably connected to the outer drill rod, and the bottom of the outer drill rod is higher than that of the inner drill rod; the sealing piece is slidably connected to the inner wall of the outer drill rod; the exhaust pipe is arranged at the top of the inner drill rod; the first driving mechanism is fixedly connected with the connecting cover; the second driving mechanism is arranged in the first driving mechanism, and the second driving mechanism is connected with the exhaust pipe; the lifting mechanism is connected with the first driving mechanism; and the lifting mechanism is arranged on the frame body. The outer drill rod protects the surrounding soil layer from scattering outwards during drilling of the inner drill rod; when upward sampling is carried out, a soil layer at the interval between the bottom of the outer drill rod and the bottom of the inner drill rod is lifted together, samples lost in the upward moving process are all samples at the position, the integrity of the samples in the inner drill rod is guaranteed, the probability of core loss is reduced, and the quality of the samples in the inner drill rod is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to salt lake drilling technical field more specifically, especially relates to a sampler for salt lake drilling. BACKGROUND

[0002] Qinghai province Qaidam basin is the salt lake resource gathering area of our country, wherein, potassium, magnesium, sodium, mirabilite, lithium, strontium reserves are in the first place in the country, potassium chloride, magnesium chloride, potassium chloride reserves account for more than 90% of the proved reserves of the country, is praised as the advantage industry of Qinghai, also is one of Qinghai four big pillar industries.

[0003] Need to use the sampler when drilling, but the geological condition of salt lake is special. There are the following difficulties when drilling: (1) drilling wall protection is difficult. Modern salt lake all belongs to water-soluble, water-sensitive stratum, especially shallow brine stratum sediment is generally not consolidated, has the characteristics of loose soft, broken, easy to collapse, easy to expand, etc., and the hole wall collapses easily in drilling construction. (2) core sampling is difficult. Potassium salt stratum hardness is low, and drillability is good, but easy to lose core, and the quality of core sampling is difficult to guarantee. UTILITY MODEL CONTENT

[0004] The utility model discloses to overcome above-mentioned situation shortage, aim at providing a sampler for salt lake drilling, can take the complete quality enough rock sample.

[0005] A sampler for salt lake drilling, comprising: an outer drill rod, the outer drill rod top is equipped with the connecting cover, be equipped with the pressurizing hole on the connecting cover;Inner drill rod, the inner drill rod sliding connection is established in the outer drill rod, and the outer drill rod bottom is higher than the inner drill rod bottom;Sealing sheet, the sealing sheet sliding connection is established in the outer drill rod inner wall;Exhaust pipe, the exhaust pipe is equipped at the inner drill rod top;First drive mechanism, the first drive mechanism is fixed with the connecting cover;Second drive mechanism, the second drive mechanism is equipped with the first drive mechanism inside, and the second drive mechanism is connected with the exhaust pipe;Lifting mechanism, the lifting mechanism is connected with the first drive mechanism;Frame, the lifting mechanism is equipped on the frame.

[0006] Further, the gap is equipped between the outer drill rod and the inner drill rod, the outer drill rod inner wall is equipped with the slide, and the sealing sheet is slidingly connected in the gap.

[0007] Further, the pressurizing hole is connected with the air pump, and the connecting cover is further provided with a gas vent, and the gas vent is detachably connected with a sealing plug.

[0008] Further, the top of the inner drill rod penetrates the connecting cover, and the inner drill rod is slidingly connected to the connecting cover.

[0009] Furthermore, the bottom of the exhaust pipe is screwed to the outer wall of the inner drill rod, the exhaust pipe is connected to the inner drill rod, and the exhaust pipe is provided with a ball valve and an exhaust hole, with the exhaust hole located above the ball valve.

[0010] Furthermore, the first driving mechanism includes a first connecting frame and a first motor, the output end of the first motor is fixedly connected to the top of the first connecting frame, and the bottom of the first connecting frame is fixedly connected to the side wall of the connecting cover.

[0011] Furthermore, the second drive mechanism includes a second connecting frame and a second motor. The second connecting frame is disposed within the first connecting frame. The fixed end of the second motor is fixedly connected within the second connecting frame. The output end of the second motor passes through the second connecting frame and is fixedly connected to the top of the exhaust pipe.

[0012] Furthermore, the first motor and the second motor are on the same vertical axis.

[0013] Furthermore, the lifting mechanism includes a third motor, a threaded rod, a movable piece, and a limiting frame. The threaded rod is fixedly connected to the output end of the third motor, the movable piece is screwed to the threaded rod, the limiting frame is disposed on both sides of the movable piece, the movable piece is slidably connected to the limiting frame, and the movable piece is fixedly connected to the first motor.

[0014] Furthermore, the fixed end of the third motor is fixed to the frame, and the bottom of the limiting frame is also fixed to the frame, which is arranged around the salt lake borehole.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] ① The outer drill rod first contacts the drilling area. After the outer drill rod cuts the soil layer, the inner drill rod cuts the middle of the soil layer that the outer drill rod has already cut. The outer drill rod can act as a rigid casing, protecting the soil layer around the inner drill rod from falling outwards during drilling. When sampling upwards, the soil layer at the distance between the bottom of the outer drill rod and the bottom of the inner drill rod is lifted together. The samples lost during the upward movement are all from this location, ensuring the integrity of the samples in the inner drill rod, reducing the probability of core loss, and ensuring the quality of the samples in the inner drill rod. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of a sampler used for drilling in salt lakes.

[0019] Figure 2 This is a schematic diagram of the inner and outer drill rods in a sampler used for drilling in salt lakes.

[0020] Figure 3 This is a schematic diagram of the exhaust pipe in a sampler used for drilling in salt lakes.

[0021] In the diagram: 1. Outer drill rod; 11. Connecting cover; 111. Pressurization hole; 112. Vent hole; 113. Sealing plug; 2. Inner drill rod; 3. Sealing plate; 4. Exhaust pipe; 41. Ball valve; 42. Exhaust hole; 5. First drive mechanism; 51. First connecting frame; 52. First motor; 6. Second drive mechanism; 61. Second connecting frame; 62. Second motor; 7. Lifting mechanism; 71. Third motor; 72. Threaded rod; 73. Moving plate; 74. Limiting frame; 8. Frame. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1 As shown, a sampler for salt lake drilling includes: an outer drill rod 1, with a connecting cover 11 at the top and a pressure hole 111 on the connecting cover 11; an inner drill rod 2, slidably connected to the outer drill rod 1, with the bottom of the outer drill rod 1 higher than the bottom of the inner drill rod 2; a sealing plate 3, slidably connected to the inner wall of the outer drill rod 1; an exhaust pipe 4, located at the top of the inner drill rod 2; a first drive mechanism 5, fixedly connected to the connecting cover 11; a second drive mechanism 6, located inside the first drive mechanism 5 and connected to the exhaust pipe 4; a lifting mechanism 7, connected to the first drive mechanism 5; and a frame 8, with the lifting mechanism 7 mounted on the frame 8.

[0024] Both the outer drill pipe 1 and the inner drill pipe 2 are used for drilling in salt lake areas, such as... Figure 2As shown, a gap is provided between the outer drill rod 1 and the inner drill rod 2. The inner wall of the outer drill rod 1 has a sliding channel, and the sealing plate 3 slides within the gap. The outer drill rod 1 first contacts the borehole stratum. After the outer drill rod 1 cuts the soil layer, the inner drill rod 2 cuts the middle of the soil layer already cut by the outer drill rod 1. The outer drill rod 1 acts as a rigid casing, protecting the surrounding soil layer from scattering outwards during drilling. When sampling upwards, the soil layer at the distance between the bottom of the outer drill rod 1 and the bottom of the inner drill rod 2 is lifted together. Samples lost during the upward movement are all from this location, ensuring the integrity of the sample in the inner drill rod 2, reducing the probability of core loss, and guaranteeing the quality of the sample in the inner drill rod 2. The sample between the outer drill rod 1 and the inner drill rod 2 is not used as the test sample; only the sample taken from the inner drill rod 2 is the test sample.

[0025] As the inner drill rod 2 drills downwards, the soil layer pushes the sealing plate 3 upwards, causing the sealing plate 3 to slide upwards, and the inner wall of the sealing plate 3 slides along the outer wall of the inner drill rod 2.

[0026] The pressurization port 111 is connected to the air pump, and the connecting cover 11 is also provided with a vent 112. A sealing plug 113 is detachably connected to the vent 112. When drilling downwards, the sealing plug 113 is opened to open the vent 112. During drilling, the sealing plate 3 pushes the air above out of the vent 112. When the sampling is completed and the device is cleaned, the sealing plug 113 is closed, and the air pump is connected to the pressurization port 111. The air from the air pump passes through the pressurization port 111 and pushes the sealing plate 3 outward to remove the soil sample from the outer drill rod 1 and clean the inner wall of the outer drill rod 1.

[0027] The top of the inner drill rod 2 passes through the connecting cover 11, and the inner drill rod 2 is slidably connected to the connecting cover 11. During drilling and sampling, there can be a speed difference between the inner drill rod 2 and the outer drill rod 1. The bottom distance between the inner drill rod 2 and the outer drill rod 1 can be adjusted by sliding the inner drill rod 2.

[0028] The bottom of the exhaust pipe 4 is screwed to the outer wall of the inner drill rod 2, and the exhaust pipe 4 is connected to the inner drill rod 2, such as... Figure 3 As shown, the exhaust pipe 4 is equipped with a ball valve 41 and an exhaust port 42, with the exhaust port 42 located above the ball valve 41. When the inner drill rod 2 is drilling, gas pushes open the ball valve 41, and then the gas flows out from the exhaust port 42. When there is no gas, the ball valve 41 is closed, facilitating the upward transport of the core sample. When the sample is removed, the inner drill rod 2 can be rotated to detach from the exhaust pipe 4.

[0029] The first drive mechanism 5 includes a first connecting frame 51 and a first motor 52. The output end of the first motor 52 is fixedly connected to the top of the first connecting frame 51, and the bottom of the first connecting frame 51 is fixedly connected to the side wall of the connecting cover 11. After the first motor 52 is started, it drives the connecting cover 11 to rotate, which in turn starts the outer drill rod 1, cutting the bottom of the salt lake through rotation.

[0030] The second drive mechanism 6 includes a second connecting frame 61 and a second motor 62. The second connecting frame 61 is located inside the first connecting frame 51. The fixed end of the second motor 62 is fixedly connected to the second connecting frame 61, and the output end of the second motor 62 passes through the second connecting frame 61 and is fixedly connected to the top of the exhaust pipe 4. When the first motor 52 starts, the second connecting frame 61 and the second motor 62 rotate together with the first connecting frame 51. At this time, the start of the second motor 62 can increase the rotational speed of the inner drill rod 2, making the inner drill rod 2 cut faster and reducing the possibility of rock sample fragmentation.

[0031] The first motor 52 and the second motor 62 are on the same vertical axis, and the center of the inner drill rod 2 and the center of the outer drill rod 1 are also on the same vertical axis.

[0032] The lifting mechanism 7 is used to drive the inner drill rod 2 and the outer drill rod 1 to rise and fall. The lifting mechanism 7 includes a third motor 71, a threaded rod 72, a movable piece 73, and a limiting frame 74. The threaded rod 72 is fixedly connected to the output end of the third motor 71, the movable piece 73 is screwed to the threaded rod 72, and the limiting frame 74 is located on both sides of the movable piece 73. The movable piece 73 is slidably connected to the limiting frame 74, and the movable piece 73 is fixedly connected to the first motor 52. When the third motor 71 is started, the threaded rod 72 rotates, and the top of the threaded rod 72 is rotatably connected to the top of the limiting frame 74. After the threaded rod 72 rotates, it drives the movable piece 73 to rise and fall. The limiting frame 74 restricts the movement path of the movable piece 73. After the movable piece 73 rises and falls, it drives the first motor 52 and the first connecting frame 51 to rise and fall, ultimately realizing the lifting and lowering of the outer drill rod 1 and the inner drill rod 2 to complete drilling and sampling.

[0033] The fixed end of the third motor 71 is fixed to the frame 8, and the bottom of the limiting frame 74 is also fixed to the frame 8. The frame 8 is arranged around the drilling hole in the salt lake. The bottom of the frame 8 is provided with a rectangular base plate. The rectangular base plate has a large contact area with the surface of the salt lake, which reduces the pressure and reduces the possibility of the salt lake surface cracking.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sampler for drilling in salt lakes, characterized in that, include: An external drill rod (1) is provided with a connecting cover (11) at the top of the external drill rod (1), and a pressure hole (111) is provided on the connecting cover (11); An inner drill rod (2) is slidably connected to an outer drill rod (1), and the bottom of the outer drill rod (1) is higher than the bottom of the inner drill rod (2). A sealing sheet (3) is slidably connected to the inner wall of the outer drill rod (1); Exhaust pipe (4), the exhaust pipe (4) is located at the top of the inner drill rod (2); The first drive mechanism (5) is fixedly connected to the connecting cover (11); The second drive mechanism (6) is located inside the first drive mechanism (5) and is connected to the exhaust pipe (4). A lifting mechanism (7) is connected to the first drive mechanism (5); The frame (8) is provided with the lifting mechanism (7) on the frame (8).

2. The sampler for salt lake drilling according to claim 1, characterized in that: A gap is provided between the outer drill rod (1) and the inner drill rod (2), and a slide is provided on the inner wall of the outer drill rod (1). The sealing plate (3) is slidably connected within the gap.

3. A sampler for salt lake drilling according to claim 2, characterized in that: The pressurization port (111) is connected to the air pump, and the connecting cover (11) is also provided with a vent (112), and a sealing plug (113) is detachably connected to the vent (112).

4. A sampler for salt lake drilling according to claim 3, characterized in that: The top of the inner drill rod (2) passes through the connecting cover (11), and the inner drill rod (2) is slidably connected to the connecting cover (11).

5. A sampler for salt lake drilling according to claim 4, characterized in that: The bottom of the exhaust pipe (4) is screwed to the outer wall of the inner drill rod (2). The exhaust pipe (4) is connected to the inner drill rod (2). The exhaust pipe (4) is provided with a ball valve (41) and an exhaust hole (42). The exhaust hole (42) is located above the ball valve (41).

6. A sampler for salt lake drilling according to claim 5, characterized in that: The first drive mechanism (5) includes a first connecting frame (51) and a first motor (52). The output end of the first motor (52) is fixedly connected to the top of the first connecting frame (51), and the bottom of the first connecting frame (51) is fixedly connected to the side wall of the connecting cover (11).

7. A sampler for salt lake drilling according to claim 6, characterized in that: The second drive mechanism (6) includes a second connecting frame (61) and a second motor (62). The second connecting frame (61) is located inside the first connecting frame (51). The fixed end of the second motor (62) is fixed inside the second connecting frame (61). The output end of the second motor (62) passes through the second connecting frame (61). The output end of the second motor (62) is fixed to the top of the exhaust pipe (4).

8. A sampler for salt lake drilling according to claim 7, characterized in that: The first motor (52) and the second motor (62) are on the same vertical axis.

9. A sampler for salt lake drilling according to claim 8, characterized in that: The lifting mechanism (7) includes a third motor (71), a threaded rod (72), a movable piece (73), and a limiting frame (74). The threaded rod (72) is fixed to the output end of the third motor (71), the movable piece (73) is screwed to the threaded rod (72), the limiting frame (74) is located on both sides of the movable piece (73), the movable piece (73) is slidably connected to the limiting frame (74), and the movable piece (73) is fixed to the first motor (52).

10. A sampler for salt lake drilling according to claim 9, characterized in that: The fixed end of the third motor (71) is fixed to the frame (8), and the bottom of the limiting frame (74) is also fixed to the frame (8). The frame (8) is arranged around the salt lake borehole.

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