CN115056091A - Small core sample grinding device - Google Patents

Abstract

The invention relates to a micro core sample polishing device, which comprises an operation table, a chuck, a spiral knob, a thimble, a carborundum abrasive sheet and a motor, wherein a left side support rod, a middle support rod and a right side support rod are arranged on the operation table side by side, the upper ends of the left side support rod, the middle support rod and the right side support rod are connected into a telescopic frame through a horizontal rod, the horizontal rod is composed of a left fixed rod, a middle telescopic rod and a right fixed tube, the middle telescopic rod is positioned between the left side support rod and the middle support rod, the operation table is a telescopic operation table composed of a left telescopic table and a right fixed table, the left telescopic table is provided with a screw rod through hole, the right fixed table is provided with a threaded hole, one end of a screw rod penetrates through hole to be in threaded connection with the right fixed table, and the other end of the screw rod is provided with the spiral knob; the motor is arranged on the right fixed platform, the connecting rod of the motor is connected with the chuck, and the left supporting rod is provided with a thimble. The invention solves the problem that the rock core is broken or the original pore structure of the rock is changed when the rock core is drilled in the prior art.

Description

A micro-core sample grinding device

Technical field:

The invention relates to a core sample preparation device for industrial micro/nano CT scanning, in particular to a tiny rock core sample grinding device.

Background technique:

The preparation of core samples is an important reference index for the accuracy of industrial micro/nano CT scanning. The core sample preparation focuses on the size of the core sample diameter and the degree of damage to the rock sample itself during the core sample preparation process, which directly It is related to the precision and accuracy of industrial micro/nano CT core sample scanning. Theoretically, the smaller the diameter of the core sample, the higher the accuracy of the industrial micro/nano CT core sample scanning; the less damage the core sample is in the preparation process, the more realistic the industrial micro/nano CT core sample scanning can be. It reflects the physical properties of the rock itself, the microscopic pore-throat structure characteristics of the rock and the connectivity characteristics of the rock pore-throat.

The existing core drilling rig is a method of simulating core drilling on drilling, and can prepare core samples of different sizes and specifications, but there are serious problems in the actual application process. On the one hand, the use of flowing water to cool the drill bit during the coring process will cause varying degrees of damage to water-sensitive rocks. The minerals inside the rock expand and deform when exposed to water, changing the original pore structure; for calcareous or argillaceous clastic rocks , in contact with water, it becomes loose rock debris, which destroys the original physical properties of the rock; for the rock with obvious brittleness, in the process of rotary drilling of the coring machine, rock debris and rock powder generated during drilling are generated. It is mixed and cemented with water to form a columnar body similar to a core column. It is found to be soft when touched by external force. It is a mixture of rock fragments and core powder, which has changed the original structure of the rock and directly affects the results of industrial micro/nano CT scanning. accuracy.

Invention content:

The purpose of the present invention is to provide a micro-core sample grinding device, which is used to solve the problem of core breaking or changing the original pore structure of the rock when drilling the core in the prior art.

The technical solution adopted by the present invention to solve the technical problem is as follows: the micro-core sample grinding device includes an operating table, a chuck, a screw knob, a thimble, an emery grinding sheet, and a motor. The support rod, the right support rod, the left support rod, the middle support rod, and the upper end of the right support rod are connected by a horizontal rod to form a telescopic frame. The horizontal rod is composed of a left fixed rod, a middle telescopic rod, and a right fixed pipe. The middle telescopic rod Located between the left support rod and the middle support rod, the operating table is a telescopic operating table composed of a left telescopic table and a right fixed table, the left telescopic table has a screw through hole, the right fixed table has a threaded hole, and one end of the screw rod passes through the screw The through hole is threadedly connected with the right fixing table, and the other end of the screw is provided with a screw knob; the motor is arranged on the right fixing table between the middle support rod and the right support rod, and the connecting rod of the motor is connected with the chuck after passing through the middle support rod. A thimble is set on the left support rod, the thimble is coaxial with the chuck, the upper end of the telescopic connecting rod is set on the left fixing rod, the telescopic connecting rod is set with a fine-tuning knob, and the lower end of the telescopic connecting rod is fixed with an emery abrasive sheet; For adjustable chucks, there are scales on the fine-tuning knob.

In the above scheme, a dust cover is set between the left support rod and the middle support rod, and the dust cover covers the emery abrasive sheets. The dust cover can effectively reduce the impact of rock dust generated during the work on the operator. bodily injury.

In the above scheme, a cuttings collector is also arranged between the left support rod and the middle support rod. The cuttings collector is located on the operating table, and the cuttings collector is located under the dust-proof cover. The cuttings produced later can reduce the pollution to the working environment and the inconvenience caused by cleaning.

In the above solution, a storage box is arranged between the middle support rod and the right support rod, the storage box is located above the motor, and the storage box can place tools such as grinding discs and chucks required in the grinding process.

In the above solution, both the left telescopic table and the right fixed table are provided with fixed claws, and the fixed claws fix the operating table on a plane.

In the above scheme, anti-skid pads are installed on the jaws of the chuck to prevent slipping due to insufficient friction between the jaws and the core sample during grinding, which affects the grinding accuracy.

The present invention has the following beneficial effects:

1. The present invention enables the core samples to be ground under anhydrous conditions, and solves the problem that the use of flowing water to cool the drill bit during the core-coring process causes different degrees of damage to water-sensitive rocks, and the minerals in the rock expand and deform when exposed to water.

2. The present invention can well control the grinding force of the emery disc on the core sample by adjusting the fine-tuning knob, which solves the damage to the pore-throat structure of the rock itself caused by the crushing of the brittle core sample when the core is taken out, and preserves it to the maximum extent. Due to the original pore structure of the rock, the core samples that were easily broken during rotary drilling can also be successfully prepared, and industrial micro/nano CT scanning can be completed.

3. In the present invention, the size of the core sample is precisely controlled by the scale of the fine-tuning knob, so that the ground core sample is more regular and uniform in diameter than the manually ground sample. / Nano CT scan comparison, reducing human error.

Description of drawings

Figure 1 is a schematic structural diagram of the present invention.

In the picture: 1 chuck, 2 claws, 3 anti-skid pads, 4 cuttings collector, 5 fixing claws, 6 screw knobs, 7 thimbles, 8 left support rods, 9 dust shields, 10 retractable connecting rods, 11 fine-tuning knob, 12 emery grinding disc, 13 middle telescopic rod, 14 storage box, 15 motor, 16 power switch, 17 middle support rod, 18 right support rod, 19 screw rod, 20 right fixed table.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings:

As shown in Figure 1, this tiny core sample grinding device includes an operating table, a chuck 1, a screw knob 6, a thimble 7, a diamond grinding disc 12, a storage box 14, and a motor 15, and a left support rod is arranged side by side on the operating table. 8. The middle support rod 17, the right support rod 18, the left support rod 8, the middle support rod 17, and the upper end of the right support rod 18 are connected to a retractable frame by a horizontal rod, and the horizontal rod is composed of a left fixed rod and a middle telescopic rod 13. , The right fixed pipe is formed, and the middle telescopic rod 13 is located between the left support rod 8 and the middle support rod 17; 20 are provided with fixed claws 5, and the fixed claws 5 fix the operating table on a plane. The left telescopic table has a screw through hole, the right fixed table 20 has a threaded hole, one end of the screw 19 is connected with the right fixed table 20 through the screw through hole, and the other end of the screw 19 is provided with a screw knob 6. The motor 15 is arranged on the right fixing table between the middle support rod 17 and the right support rod 18, and the drive shaft of the motor 15 passes through the middle support rod and is connected to the chuck 1. Connection, the motor 15 is used to control the movement of the chuck 1, drive the rock sample to rotate, and grind the core sample; a thimble 7 is arranged on the left support rod 8, and the thimble 7 is arranged coaxially with the chuck 1, and the upper end of the retractable connecting rod 10 Set on the left fixed rod, the telescopic connecting rod 10 is provided with a fine-tuning knob 11, the lower end of the telescopic connecting rod 10 is fixed with an emery abrasive sheet 12, and the fine-tuning knob 11 is provided with a scale to increase grinding accuracy.

The chuck 1 is an adjustable chuck, used to hold the rock sample, and can be adjusted according to the size of the rock sample to be polished.

The motor 15 controls the rotation of the chuck 1 through the connecting rod. The chuck 1 can be replaced according to the size of the core sample and the core sample to be polished. The claw 2 of the chuck 1 is equipped with a non-slip pad 3 to prevent the The friction between the jaws and the core sample is insufficient and slippage affects the grinding accuracy; a storage box 14 is designed above the motor 15, which can place different specifications of chucks, emery grinding discs and other tools required for grinding.

By adjusting the screw knob 6, the thimble 7 is controlled to push the core sample tightly, further strengthening the core sample, preventing the core sample from moving during grinding and affecting the grinding accuracy. A dust-proof cover 9 is arranged between the left support rod 8 and the middle support rod 17. The dust-proof cover 9 completely covers the polished sample during grinding, preventing rock chips and rock dust from floating in the operating room during grinding. It can prevent the operator from inhaling a large amount of rock dust during work and cause harm to the body, and reduce the pollution of rock debris and rock dust to the working environment, which is convenient for cleaning. A cuttings collector 4 is designed under the dust-proof cover 9, so that the cuttings and dust generated during the grinding process are stored in the cuttings collector, and the cuttings in the cuttings collector can be cleaned after working for a period of time. .

The fine-tuning knob 11 is used to control the emery disc 12 on the retractable connecting rod 10. By adjusting the fine-tuning knob slowly, the emery disc 12 can be slightly contacted with the core sample for grinding until it reaches the desired diameter of the core sample. 11 is engraved with a scale, which can precisely control the diameter of the core sample after grinding, reduce human error, and improve the accuracy of industrial micro/nano CT scanning. The emery discs 12 can be replaced according to different lithologies and diameters of core samples, and suitable discs can be selected for grinding to improve work efficiency.

The method for grinding the above-mentioned tiny core samples by clamping the grinding device:

Step 1: Grind the diameter of the core sample according to the needs, select the chuck of the corresponding specification, clamp the core to be polished with the chuck, and then adjust the screw knob 6 to make the thimble 7 press against the core sample;

Step 2: Adjust the fine-tuning knob 11 so that the emery disc 12 is slowly approached to the core sample downward, turn on the motor power switch 16, the motor 15 drives the core sample to rotate through the chuck 1, and then adjust the fine-tuning knob 11 to make the emery disc 12 contact Grind the core sample until the required diameter is reached, turn off the motor power 16, and complete the grinding of the core sample;

Step 3: Adjust the screw knob 6 and the chuck 1, Panasonic core samples, and take out the polished core samples.

Claims (6)

1. The utility model provides a tiny core sample grinding device which characterized in that: the micro core sample polishing device comprises an operation table, a chuck, a spiral knob, a thimble, a carborundum abrasive disc and a motor, wherein a left side supporting rod, a middle supporting rod and a right side supporting rod are arranged on the operation table side by side, the upper ends of the left side supporting rod, the middle supporting rod and the right side supporting rod are connected into a telescopic frame through horizontal rods, each horizontal rod consists of a left fixing rod, a middle telescopic rod and a right fixing tube, the middle telescopic rod is positioned between the left side supporting rod and the middle supporting rod, the operation table is a telescopic operation table consisting of a left telescopic table and a right fixed table, the left telescopic table is provided with a screw rod through hole, the right fixed table is provided with a threaded hole, one end of a screw rod penetrates through the screw rod through hole to be in threaded connection with the right fixed table, and the other end of the screw rod is provided with the spiral knob; the motor is arranged on a right fixing table between the middle supporting rod and the right supporting rod, a connecting rod of the motor penetrates through the middle supporting rod and then is connected with the chuck, a thimble is arranged on the left supporting rod and is coaxially arranged with the chuck, the upper end of the telescopic connecting rod is arranged on the left fixing rod, the telescopic connecting rod is provided with a fine adjustment knob, and a carborundum abrasive sheet is fixed at the lower end of the telescopic connecting rod; the chuck is an adjustable chuck, and the fine adjustment knob is provided with scales.

2. The micro core sample grinding device according to claim 1, wherein: left side bracing piece and middle support bar between set up dustproof shade, dustproof shade is with including the diamond dust grinding piece cover.

3. The tiny core sample grinding device of claim 2, wherein: the left side bracing piece and the middle support bar between still set up the detritus collector, the detritus collector is located the below of dustproof shade.

4. The micro core sample grinding device according to claim 3, wherein: a containing box is arranged between the middle supporting rod and the right supporting rod and is positioned above the motor.

5. The micro core sample grinding device according to claim 4, wherein: the left telescopic table and the right fixed table are both provided with fixed claws, and the operating tables are fixed on a plane by the fixed claws.

6. The micro core sample grinding device according to claim 5, wherein: and the clamping jaws of the chuck are provided with anti-slip pads.

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