Rock core anti-damage sampling device for coal-bearing stratum

Abstract

The utility model discloses a rock core anti-damage sampling device for a coal-bearing stratum, which relates to the technical field of auxiliary rock core sampling, and comprises a mounting mechanism, a sampling mechanism and a sampling mechanism, the two connecting rods A are fixedly mounted on the outer wall of the clamping frame; the two arc-shaped clamping plates are fixedly mounted on the end wall, far away from the clamping frame, of the connecting rod A; the adjusting assembly is arranged on the two clamping frames and used for adjusting the distance between the two clamping frames; the guide mechanism comprises the guide mechanism and the mounting mechanism, the guide wheel and the guide frame in the guide mechanism can play a role in guiding the movement of the sampling barrel, so that the shaking phenomenon of the sampling barrel in the moving process is reduced, the collision between the sampling barrel and the inner wall of a shaft is reduced, and the sampling efficiency is improved. Therefore, the probability of rock core damage is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of auxiliary core sampling, especially relates to a core anti-damage sampling device for coal-bearing strata. BACKGROUND

[0002] When core sampling operation is carried out in coal-bearing strata, the integrity of the core is crucial for obtaining accurate geological information.

[0003] However, there is a significant problem in the current core taking process: when the sampling cylinder completes sampling and rises, the sampling cylinder and the lifting device are connected through a pin shaft structure, and there is a lack of guiding mechanism for the movement of the sampling cylinder in the wellbore, which causes the sampling cylinder to collide with the inner wall of the wellbore during movement, and frequent collisions inevitably cause damage to the coal body, affecting the quality of the collected core; therefore, in order to solve the above problems, the device proposes a core anti-damage sampling device for coal-bearing strata. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings in the prior art and proposes a core anti-damage sampling device for coal-bearing strata.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A core anti-damage sampling device for coal-bearing strata, comprising:

[0007] A mounting mechanism, the mounting mechanism comprising:

[0008] Two clamping frames;

[0009] Two connecting rods A, fixedly installed on the outer wall of the clamping frame;

[0010] Two arc-shaped clamping plates, fixedly installed on the end wall of the connecting rod A away from the clamping frame;

[0011] An adjusting assembly, provided on the two clamping frames, for adjusting the distance between the two clamping frames;

[0012] A guiding mechanism, the guiding mechanism comprising:

[0013] Two groups of guiding frames, installed on the outer wall of the clamping frame;

[0014] Two mounting frames, fixedly installed on the guiding frame;

[0015] Two guide wheels, rotatably installed on the mounting frame.

[0016] The technical scheme further comprises: the adjusting assembly comprises a bidirectional screw rod, one side end wall of each of the two clamping frames is fixedly provided with a threaded sliding block, and the two threaded sliding blocks are threadedly connected to different threads on the two sides of the outer wall of the bidirectional screw rod.

[0017] One end of the clamping frame away from the threaded sliding block is fixedly connected with a limiting sliding block, a limiting rod A is arranged between the two clamping frames, and the limiting sliding block is slidingly connected to the outer wall of the limiting rod A.

[0018] The guiding frame comprises a connecting rod B fixedly installed on the outer wall of the clamping frame, a sleeve is fixedly installed on the end of the connecting rod B away from the clamping frame, an adjusting rod is slidingly connected to the inner wall of the sleeve, the mounting frame is fixedly connected to the end wall of the adjusting rod, a locking screw A is threadedly connected to the top wall of the sleeve, and the locking screw A is used for locking and fixing the adjusting rod.

[0019] A limiting rod B is fixedly installed on the outer wall of the adjusting rod, a through hole is formed in the side wall of the connecting rod B, one end of the limiting rod B away from the adjusting rod is slidingly connected to the inner wall of the through hole, a locking screw B is threadedly connected to the side wall of the connecting rod B, and the locking screw B is used for locking and fixing the limiting rod B.

[0020] The guiding wheel comprises a rotating column rotatably installed on the inner wall of the mounting frame, two baffles are slidingly connected to the outer wall of the rotating column, a threaded through hole is formed in the baffle, a locking screw C is threadedly connected to the inner wall of the threaded through hole, and the locking screw C is used for locking and fixing the baffle.

[0021] Compared with the prior art, the utility model has the advantages that:

[0022] 1、The utility model discloses a guiding mechanism and mounting mechanism are set up, through setting up the guiding wheel in the guiding mechanism, guiding frame can play the guiding effect to the movement of the sampling barrel, reduce the phenomenon that the sampling barrel shakes in the movement, reduce the collision of sampling barrel and the inner wall of well shaft, thereby reduce the probability of core damage.

[0023] 2、The utility model discloses a guiding wheel is provided with two adjustable baffles, through the position of adjusting the baffle, when being applied to the sampling barrel of different diameters, the baffle can be adjusted to the side wall of the setting of sticking sampling barrel, and this design is used to adapt to the sampling barrel of multiple diameters, improves the stability in the process of sampling barrel lifting. ACCURACY OF DRAWINGS

[0024] Figure 1 It is the first use state structure schematic drawing of the utility model;

[0025] Figure 2 It is the second use state structure schematic drawing of the utility model;

[0026] Figure 3 The whole structure schematic view of the utility model is provided.

[0027] Figure 4 The partial structure schematic view of the guide mechanism.

[0028] In the drawing:

[0029] 10, clamping frame, 11, connecting rod A, 12, arc-shaped clamping plate, 13, bidirectional screw rod, 14, threaded sliding block, 20, limiting rod A, 21, limiting sliding block, 30, connecting rod B, 31, sleeve, 32, adjusting rod, 33, locking screw rod A, 34, limiting rod B, 35, locking screw rod B, 36, mounting frame, 37, guide wheel, 371, rotating column, 372, baffle, 373, locking screw rod C. DETAILED DESCRIPTION

[0030] The technical scheme of the utility model is further explained below in combination with the drawings and specific embodiments.

[0031] Embodiment one

[0032] Refer to the drawings Figures 1-4 , including:

[0033] The mounting mechanism comprises two clamping frames 10, two connecting rods A 11 fixedly installed on the outer wall of the clamping frame 10, and two arc-shaped clamping plates 12 fixedly installed on the end wall of the connecting rod A 11 away from the clamping frame 10, wherein the two arc-shaped clamping plates 12 are arranged on the two sides of the wellbore, and the device can be fixed on the wellbore by clamping the two arc-shaped clamping plates 12 on the sidewall of the wellbore.

[0034] The adjusting assembly is arranged on the two clamping frames 10 and is used for adjusting the distance between the two clamping frames 10, and the adjusting assembly comprises a bidirectional screw rod 13, a threaded sliding block 14 is fixedly installed on one side end wall of each of the two clamping frames 10, and the two threaded sliding blocks 14 are threadedly connected to the threads on the two sides of the outer wall of the bidirectional screw rod 13 in different directions, wherein the distance between the two arc-shaped clamping plates 12 can be adjusted by adjusting the distance between the two clamping frames 10, and the specific principle is that the bidirectional screw rod 13 can be rotated during adjustment, the threads on the outer wall of the bidirectional screw rod 13 are engaged with the threads on the inner wall of the threaded sliding block 14 after the bidirectional screw rod 13 is rotated, so that the two threaded sliding blocks 14 move in the direction of approaching each other / moving away from each other, thereby driving the two clamping frames 10, the two connecting rods A 11 and the two arc-shaped clamping plates 12 to move in the direction of approaching each other / moving away from each other.

[0035] The end of the clamping frame 10 away from the threaded sliding block 14 is fixedly connected with a limiting sliding block 21, limiting rods A20 are arranged between the two clamping frames 10, and the limiting sliding block 21 is slidingly connected to the outer wall of the limiting rod A20; in order to improve the stability of the movement of the clamping frame 10 during adjustment, the limiting rod A20 and the limiting sliding block 21 are arranged to guide the movement of the clamping frame 10, that is, when the two clamping frames 10 move, the limiting sliding block 21 slides on the outer wall of the limiting rod A20.

[0036] The guiding mechanism comprises:

[0037] Two mounting frames 36 are fixedly mounted on the guide frame;

[0038] Two groups of guide frames are mounted on the outer wall of the clamping frame 10; the guide frame comprises a connecting rod B30 fixedly mounted on the outer wall of the clamping frame 10, a sleeve 31 fixedly mounted on the end of the connecting rod B30 away from the clamping frame 10, an adjusting rod 32 slidingly connected to the inner wall of the sleeve 31, a mounting frame 36 fixedly connected to the end wall of the adjusting rod 32, and a locking screw A33 threadedly connected to the top wall of the sleeve 31, the locking screw A33 being used to lock and fix the adjusting rod 32; wherein the position of the two guide wheels 37 can be adjusted to adapt to the clamping of sampling cylinders of different diameters, and the specific principle is as follows: when adjusting, the locking screw A33 is counterclockwise rotated to release the fixation of the adjusting rod 32 by the locking screw A33, and then the adjusting rod 32 can be moved, and the adjusting rod 32 drives the mounting frame 36 to move after being moved, so that the mounting frame 36 drives the guide wheel 37 to move.

[0039] A limiting rod B34 is fixedly mounted on the outer wall of the adjusting rod 32, a through hole is formed in the side wall of the connecting rod B30, the end of the limiting rod B34 away from the adjusting rod 32 is slidingly connected to the inner wall of the through hole, and a locking screw B35 is threadedly connected to the side wall of the connecting rod B30, the locking screw B35 being used to lock and fix the limiting rod B34; in order to further improve the stability of the adjusting rod 32, the limiting rod B34 is arranged to assist in supporting the adjusting rod 32, and when the adjusting rod 32 moves, the limiting rod B34 can be moved after the fixation of the limiting rod B34 by the locking screw B35 is released.

[0040] Two guide wheels 37 are rotatably installed on the mounting frame 36; the guide wheel 37 comprises a rotating column 371 rotatably installed on the inner wall of the mounting frame 36, the outer wall of the rotating column 371 is slidably connected with two baffles 372, the baffle 372 is provided with a threaded hole, the inner wall of the threaded hole is threadedly connected with a locking screw C 373, the locking screw C 373 is used for locking and fixing the baffle 372; wherein, when the sampling cylinder with different diameters is used, in order to better limit the sampling tube by the baffle 372, the position of the baffle 372 can be adjusted here, when adjusting, first counterclockwise rotate the locking screw C 373, release the fixing of the locking screw C 373 to the rotating column 371, then move the baffle 372, so as to adjust the position of the baffle 372, after adjusting to the appropriate position, clockwise rotate the locking screw C 373 to lock and fix the rotating column 371.

[0041] In this embodiment, the working principle of the device is: when the sampling cylinder needs to be taken out of the wellbore, first rotate the bidirectional screw rod 13 according to the size of the wellbore, the threads on the two sides of the outer wall of the bidirectional screw rod 13 are engaged with the threads on the inner wall of the screw block 14, so that the two screw blocks 14 drive the clamping frame 10, the connecting rod A 11 and the arc-shaped clamping plate 12 to move towards each other or away from each other, clamping the two arc-shaped clamping plates 12 on the two side walls of the wellbore, completing the installation and fixation of the device on the wellbore.

[0042] After installation is completed, according to the diameter of the sampling cylinder, adjust the guide mechanism, first counterclockwise rotate the locking screw A 33, release the fixation of the adjusting rod 32, move the adjusting rod 32, the adjusting rod 32 drives the mounting frame 36 and the guide wheel 37 to move, so that the distance between the guide wheels 37 adapts to the diameter of the sampling cylinder, after adjustment, clockwise rotate the locking screw A 33 to fix it;

[0043] When the sampling cylinder completes sampling and rises, the guide wheels 37 roll on the outer wall of the sampling cylinder, which plays a guiding role for the movement of the sampling cylinder, reduces the shaking of the sampling cylinder during lifting, and avoids frequent collision with the inner wall of the wellbore. Due to the cooperation of the guide wheels 37 and the baffles 372, the sampling cylinder remains stable during the rising process, reducing the probability of damage to the core due to collision.

[0044] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A coring device for use in coal-bearing formations, comprising: The utility model relates to a kind of adjustable guide mechanism, including: Mounting mechanism, the mounting mechanism includes: Two clamping frames (10); Two connecting rods A (11) are fixedly installed on the outer wall of the clamping frame (10); Two arc-shaped clamping plates (12) are fixedly installed on the end wall of the connecting rod A (11) away from the clamping frame (10); Adjusting assembly, the adjusting assembly is arranged on two clamping frames (10), for adjusting the distance between two clamping frames (10); Guiding mechanism, the guiding mechanism includes: Two groups of guide frames are installed on the outer wall of the clamping frame (10); Two mounting frames (36) are fixedly installed on guide frame; Two guide wheels (37) are rotatably installed on mounting frame (36).

2. A device for undamaged coring of coal-bearing formations according to claim 1, characterized in that The adjusting assembly includes two-way screw rod (13), one side end wall of two clamping frames (10) is fixedly installed with threaded slider (14) respectively, two threaded sliders (14) are respectively screw-connected on the outer wall of two-way screw rod (13) two sides in different directions.

3. A device for undamaged coring of coal-bearing formations according to claim 2, characterized in that The end of the clamping frame (10) away from the threaded slider (14) is fixedly connected with limit slider (21), and limit rod A (20) is arranged between two clamping frames (10), and the outer wall of the limit slider (21) is slidably connected with the limit rod A (20).

4. A device for undamaged coring of coal-bearing formations according to claim 3, characterized in that The guide frame includes connecting rod B (30) fixedly installed on the outer wall of the clamping frame (10), the end of the connecting rod B (30) away from the clamping frame (10) is fixedly installed with sleeve (31), the inner wall of the sleeve (31) is slidably connected with adjusting rod (32), the end wall of the adjusting rod (32) is fixedly connected with mounting frame (36), the top wall of the sleeve (31) is screw-connected with locking screw A (33), and the locking screw A (33) is used to lock and fix adjusting rod (32).

5. A device for undamaged coring of coal-bearing formations according to claim 4, characterized in that The outer wall of the adjusting rod (32) is fixedly installed with limit rod B (34), the side wall of the connecting rod B (30) is provided with through hole, the end of the limit rod B (34) away from the adjusting rod (32) is slidably connected with the inner wall of the through hole, and the side wall of the connecting rod B (30) is screw-connected with locking screw B (35), and the locking screw B (35) is used to lock and fix limit rod B (34).

6. A device for undamaged coring of coal-bearing formations according to claim 5, characterized in that The guide wheel (37) includes rotating column (371) rotatably installed on the inner wall of the mounting frame (36), the outer wall of the rotating column (371) is slidably connected with two baffles (372), the baffle (372) is provided with threaded through hole, the inner wall of the threaded through hole is screw-connected with locking screw C (373), and the locking screw C (373) is used to lock and fix baffle (372).

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