Mining deep hole fixed-point sampling device

Abstract

The utility model belongs to the technical field of coal mining, and particularly relates to a mining deep hole fixed-point sampling device which comprises a hollow drill bit, a sampling barrel and a core storage barrel, a sampling valve is arranged in the sampling barrel and comprises a valve seat, a spherical valve core and a shifting block, and an opening is formed in the spherical valve core; a first limiting hole and a second limiting hole are formed in the sampling barrel, the first limiting hole and the second limiting hole are formed in the circumferential direction and the axial direction of the sampling barrel respectively, and the second limiting hole is located in the center line of the first limiting hole; the shifting block is installed in the first limiting hole in a sliding mode, a limiting protrusion is arranged on the shifting block, and the limiting protrusion abuts against the hole wall of the second limiting hole; the core storage barrel and the sampling barrel can rotate relatively, so that the shifting block moves in the first limiting hole, and the interaction force of the hole wall of the second limiting hole and the limiting bulge can push the shifting block and the spherical valve core to rotate, so that the opening direction of the spherical valve core is changed; the technical problems that an existing sampling device is large in manufacturing difficulty and high in cost, and opening and closing of a sampling valve are prone to failure are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to coal mining technical field, concretely relates to a mine deep hole fixed point sampling device. BACKGROUND

[0002] Coal sample needs to be obtained for coal seam outburst zoning, gas basic data collection, ground area management underground investigation and evaluation and the like, and then gas content index is determined. In order to adapt to the development demand of coal mine underground disaster management transparency, the technical advantages of directional drilling precision construction are fully utilized, the fixed point sampling target can be reached, and how to safely and efficiently obtain coal sample in deep hole is a problem to be solved for the technical problem of sampling difficulty in broken soft coal seam.

[0003] The patent document with the patent announcement number CN 220890180 U discloses a kind of coal mine deep hole fixed point airtight sampling device, including drill bit, sampling cylinder, storage core cylinder and connecting head, sampling valve is rotatably installed in sampling cylinder, sampling valve includes valve seat, ball valve core and gear, gear is engaged on the tooth groove of sampling cylinder long circular hole, when storage core cylinder and sampling cylinder relatively rotate, the opening direction of ball valve core is changed by the cooperation of gear and tooth groove, to realize the opening and closing of sampling valve;But this kind of gear, tooth groove structure manufacturing difficulty is greater, manufacturing cost is higher, and gear, tooth groove engagement effect is poorer, gear, tooth groove is easily jammed in use process, leading to sampling valve opening and closing failure, cannot obtain coal sample. UTILITY MODEL CONTENT

[0004] The utility model is aimed at providing a kind of mine deep hole fixed point sampling device to solve the technical problems that existing sampling device manufacturing difficulty is big, cost is high, sampling valve opening and closing are easily invalid.

[0005] In order to solve the above technical problems, the utility model provides the following technical scheme:

[0006] A kind of mine deep hole fixed point sampling device, including hollow drill bit, sampling cylinder and storage core cylinder which are coaxially sequentially arranged, sampling valve is arranged in sampling cylinder, sampling valve includes valve seat rotatably installed in sampling cylinder, valve seat is fixedly connected with storage core cylinder, ball valve core and shift block rotatable are respectively arranged in the inside and outside of valve seat, ball valve core and shift block are fixedly connected, and opening is arranged on ball valve core Penetrates ball valve core;First limit hole and second limit hole are arranged on sampling cylinder and are communicated with each other, first limit hole and second limit hole are respectively arranged along the circumferential direction and axial direction of sampling cylinder, and second limit hole is located on the midline of first limit hole;Shift block is slidably installed in first limit hole, limit protrusion is arranged on shift block, and limit protrusion is abutted with the hole wall of second limit hole;Storage core cylinder and sampling cylinder can relatively rotate, so that shift block moves along the length direction of first limit hole, and the interaction force of the hole wall of second limit hole and limit protrusion can drive shift block and ball valve core to rotate, to change the opening direction of ball valve core.

[0007] Further, the sampling cylinder is provided with two symmetrical guide holes, the valve seat is provided with two symmetrical guide columns, and the two guide columns are slidably installed in the two guide holes, and when the guide columns are located at the end of the guide hole, the opening direction of the ball valve core is in a vertical or horizontal state.

[0008] Further, the first limiting hole, the second limiting hole and the block are all provided with two, the two first limiting holes are symmetrically arranged on the two sides of the sampling cylinder, the two blocks are symmetrically arranged on the two sides of the ball valve core, the two blocks are slidably installed in the two first limiting holes, the limiting protrusions of the two blocks are respectively in contact with the hole walls of the two second limiting holes, and the limiting protrusions of the two blocks are opposite to each other.

[0009] Further, the hollow drill bit is fixed with a sealing cylinder, the sealing cylinder is sleeved outside the sampling cylinder and the core storage cylinder, and the core storage cylinder is provided with a sealing ring for enhancing the sealing performance between the sealing cylinder and the core storage cylinder.

[0010] Further, the valve seat comprises a left valve seat and a right valve seat, a gap is arranged between the left valve seat and the right valve seat, the block is fixedly connected with the ball valve core through a connecting pin, and the connecting pin penetrates the gap between the left valve seat and the right valve seat.

[0011] Compared with the prior art, the utility model has the following beneficial technical effects:

[0012] The first limiting hole, the second limiting hole, the block and the limiting protrusion are arranged, so that when the sampling cylinder and the core storage cylinder rotate relative to each other, the relative action of the second limiting hole and the limiting protrusion can drive the block and the ball valve core to rotate, the opening direction of the ball valve core is changed between the vertical and horizontal states, the opening and closing of the sampling valve are realized, compared with the prior art, the gear and the gear groove structure are used to realize the opening and closing of the sampling valve, the meshing effect of the gear and the gear groove can be effectively avoided, the opening and closing failure of the sampling valve caused by the gear and the gear groove jamming in the use process is avoided, the success rate of sampling of the sampling device is improved, and the technical scheme adopted by the utility model is simple in design and manufacturing and processing, convenient and low in manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the utility model;

[0014] Figure 2 It is an explosion view of the utility model;

[0015] Figure 3 It is a local structure view of the utility model;

[0016] Figure 4 It is a side view and a sectional view of the sampling cylinder of the utility model.

[0017] In the diagram: 1. Hollow drill bit; 2. Sampling cylinder; 21. First limiting hole; 22. Second limiting hole; 23. Guide hole; 3. Core storage cylinder; 31. Sealing ring; 4. Sampling valve; 41. Left valve seat; 411. Guide column; 42. Right valve seat; 43. Ball valve core; 431. Opening; 44. Toggle block; 441. Limiting protrusion; 5. Sealing cylinder; 6. Connector. Detailed Implementation

[0018] The following detailed description illustrates the specific implementation method:

[0019] Example

[0020] like Figures 1-2 As shown, a deep-hole fixed-point sampling device for mining includes a hollow drill bit 1, a sampling cylinder 2, a core storage cylinder 3, and a connector 6 for mounting drill rods, arranged coaxially from left to right. The sampling cylinder 2 is equipped with a sampling valve 4, which includes a valve seat, a ball valve core 43, and two levers 44. The valve seat includes a left valve seat 41 and a right valve seat 42, with a notch between them. The right valve seat 42 is fixed to the left end of the core storage cylinder 3. The ball valve core 43 and the levers 44 are rotatably mounted inside and outside the valve seat, respectively. The 3-piece valve core 43 has an opening 431 that passes through it. Two levers 44 are symmetrically fixed to both sides of the ball valve core 43 by connecting pins. The connecting pins pass through the notch between the left valve seat 41 and the right valve seat 42. Two symmetrical guide holes 23 are opened on the side wall of the sampling cylinder 2. Two guide posts 411 are welded and fixed to the left valve seat 41. The two guide posts 411 are slidably installed in the two guide holes 23 respectively. When the guide posts 411 are located at the ends of the guide holes 23, the opening 431 of the ball valve core 43 is in a vertical or horizontal state. Figures 3-4 As shown, the sampling cylinder 2 has a first limiting hole 21 and a second limiting hole 22 on both sides. The first limiting hole 21 and the second limiting hole 22 are respectively arranged along the circumference and axial direction of the sampling cylinder 2. The two first limiting holes 21 are symmetrically arranged, and the two second limiting holes 22 are respectively located on the center line of the two first limiting holes 21. The first limiting holes 21 and the second limiting holes 22 on the same side are interconnected. The two levers 44 are slidably installed in the two first limiting holes 21. Each lever 44 is provided with a limiting protrusion 441. The two limiting protrusions 441 abut against the hole walls of the two second limiting holes 22, and the two limiting protrusions 441 face opposite directions. The core storage cylinder 3 and the sampling cylinder 2 can rotate relative to each other, so that the levers 44 can move along the length direction of the first limiting hole 21. The interaction force between the hole wall of the second limiting hole 22 and the limiting protrusion 441 can push the levers 44 and the ball valve core 43 to rotate, changing the direction of the opening 431 of the ball valve core 43.

[0021] The hollow drill bit 1 is fixed with a sealing cylinder 5, the sealing cylinder 5 is sleeved on the sampling cylinder 2 and the core storage cylinder 3, the core storage cylinder 3 is provided with a sealing ring 31, and the sealing ring 31 is used for enhancing the sealing performance between the sealing cylinder 5 and the core storage cylinder 3.

[0022] The implementation is as follows:

[0023] 1. When the sampling hole drilling construction is completed, the drill rod is withdrawn;

[0024] 2. The sampling device is connected with the drill rod and the drilling machine, at this time, the sampling valve 4 is closed, the opening 431 of the ball valve core 43 is in a vertical state, the opening 431 of the ball valve core 43 abuts against the inner walls of the left valve seat 41 and the right valve seat 42, the channel between the hollow drill bit 1 and the core storage cylinder 3 is cut off, the two shift blocks 44 are respectively located at one end of the two first limiting holes 21, and the two guide columns 411 are respectively located at one end of the two guide holes 23;

[0025] 3. The drilling machine is started, the drilling machine drives the drill rod to rotate forward and advance forward, the sampling valve 4 remains in a closed state, until the hollow drill bit 1 moves to the sampling point, the advancing pressure of the drilling machine and the drill rod makes the hollow drill bit 1 abut against the front rock wall, the reverse force of the rock wall makes the hollow drill bit 1 and the sampling cylinder 2 fixed, at the same time, the output direction of the drilling machine is changed, the drill rod, the core storage cylinder 3, the left valve seat 41 and the right valve seat 42 are reversely rotated, the core storage cylinder 3 and the sampling cylinder 2 are relatively rotated, the shift block 44 is rotated from one end of the first limiting hole 21 to the other end, in the rotating process, the relative force between the hole wall of the second limiting hole 22 and the limiting protrusion 441 drives the shift block 44 to rotate along the center line of the shift block 44, drives the opening 431 of the ball valve core 43 to rotate to a horizontal state, the channel between the hollow drill bit 1 and the core storage cylinder 3 is communicated, and then the sampling valve 4 is opened;

[0026] 4. The drilling machine continuously reversely rotates and advances to sample, the coal sample enters the core storage cylinder 3 from the opening 431 of the ball valve core 43 through the hollow drill bit 1, until the advancing stroke of the drilling machine is greater than the total length of the sampling device, that is, the sampling is completed;

[0027] 5. The output direction of the drilling machine is changed again, the drill rod, the core storage cylinder 3, the left valve seat 41 and the right valve seat 42 are restored to forward rotation, the core storage cylinder 3 and the sampling cylinder 2 are relatively rotated again, the shift block 44 is moved and reset to the initial position in the first limiting hole 21, in the rotating and resetting process of the shift block 44, the relative force between the hole wall of the second limiting hole 22 and the limiting protrusion 441 drives the shift block 44 to rotate, the opening 431 of the ball valve core 43 is rotated and restored to a vertical state, the sampling valve 4 is closed, and the coal sample is sealed and stored in the core storage cylinder 3;

[0028] 6, keep the drill output direction, make the drill rod continue to rotate, and withdraw the drill rod one by one until the sampling device is recovered to the drill, the sampling device is taken off from the drill rod, and the coal sample in the sampling device can be analyzed to obtain the real situation of the sampling point coal sample.

[0029] The sampling valve 4 of the sampling device is simple in structure design, simple in manufacturing and processing, lower in manufacturing cost, not easy to be stuck during opening and closing, can effectively avoid mechanical failure of the sampling valve 4, and improves the success rate of sampling of the sampling device.

[0030] The above is only an embodiment of the utility model, and common technical solutions and / or characteristics in the scheme are not described in detail. It should be noted that, for those skilled in the art, without departing from the technical solutions of the utility model, a number of modifications and improvements can be made, which should also be considered as the protection scope of the utility model, and these will not affect the effect and practicality of the utility model. The protection scope of the present application should be subject to the content of the claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A deep-hole fixed-point sampling device for mining, comprising a hollow drill bit (1), a sampling cylinder (2), and a core storage cylinder (3) arranged coaxially in sequence, wherein a sampling valve (4) is provided inside the sampling cylinder (2), the sampling valve (4) comprising a valve seat rotatably installed inside the sampling cylinder (2), the valve seat being fixedly connected to the core storage cylinder (3), wherein a rotatable spherical valve core (43) and a lever (44) are respectively provided inside and outside the valve seat, the spherical valve core (43) and the lever (44) being fixedly connected, and an opening (431) penetrating the spherical valve core (43) is provided on the spherical valve core (43), characterized in that: The sampling cylinder (2) is provided with a first limiting hole (21) and a second limiting hole (22) in communication with each other, the first limiting hole (21) and the second limiting hole (22) are arranged along the circumferential direction and the axial direction of the sampling cylinder (2) respectively, and the second limiting hole (22) is located on the center line of the first limiting hole (21); the dial block (44) is slidably installed in the first limiting hole (21), the dial block (44) is provided with a limiting protrusion (441), and the limiting protrusion (441) abuts against the hole wall of the second limiting hole (22); the core storage cylinder (3) and the sampling cylinder (2) can relatively rotate, so that the dial block (44) moves along the length direction of the first limiting hole (21), and the interaction force between the hole wall of the second limiting hole (22) and the limiting protrusion (441) can drive the dial block (44) and the ball valve core (43) to rotate, so that the opening (431) direction of the ball valve core (43) is changed.

2. The deep hole spot sampling device for mine use according to claim 1, characterized in that: The sampling cylinder (2) is provided with two symmetrical guide holes (23), the valve seat is provided with two guide columns (411) symmetrically, the two guide columns (411) are slidably installed in the two guide holes (23) respectively, and when the guide column (411) is located at the end of the guide hole (23), the opening (431) direction of the ball valve core (43) is in a vertical or horizontal state.

3. The deep hole spot sampling device for mine use according to claim 2, characterized in that: The first limiting hole (21), the second limiting hole (22) and the dial block (44) are all provided with two, the two first limiting holes (21) are symmetrically arranged on the two sides of the sampling cylinder (2), the two dial blocks (44) are symmetrically arranged on the two sides of the ball valve core (43), the two dial blocks (44) are slidably installed in the two first limiting holes (21) respectively, the limiting protrusions (441) of the two dial blocks (44) abut against the hole walls of the two second limiting holes (22) respectively, and the limiting protrusions (441) of the two dial blocks (44) face opposite directions.

4. The deep hole spot sampling device for mine use according to any one of claims 1-3, characterized in that: The hollow drill bit (1) is fixed with a sealing cylinder (5), the sealing cylinder (5) is sleeved outside the sampling cylinder (2) and the core storage cylinder (3), the core storage cylinder (3) is provided with a sealing ring (31), and the sealing ring (31) is used for enhancing the sealing performance between the sealing cylinder (5) and the core storage cylinder (3).

5. The deep hole spot sampling device for mining as claimed in claim 4, characterized in that: The valve seat comprises a left valve seat (41) and a right valve seat (42), a gap is arranged between the left valve seat (41) and the right valve seat (42), the dial block (44) is fixedly connected with the ball valve core (43) through a connecting pin, and the connecting pin penetrates through the gap between the left valve seat (41) and the right valve seat (42).

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