A device for cutting rock standard core specimens and a method of using the same

Abstract

The present invention provides a device for cutting standard rock core specimens and a use method, which can not only meet the requirements for cutting samples under different test conditions, but also play the role of dust prevention and noise reduction, and reducing harm to operators and the environment. The device is equipped with multiple electric push rods, which are connected to a first cover plate, a cutting motor, a cutting table, a second cover plate, a core drill and a rotary cutting table. The electric push rods push the cutting table and the cutting motor into a large water tank, the first cover plate closes the large water tank, the cutting motor cuts the core sample placed on the cutting table to a standard length in the large water tank, the electric push rods push the core drill and the rotary cutting table into a small water tank, the second cover plate closes the small water tank, and the core motor cuts the core sample placed on the rotary cutting table to a standard diameter in the small water tank.

Description

Technical Field

[0001] The invention relates to a manufacturing process of a standard core specimen for a rock uniaxial compressive strength test in the field of geotechnical engineering investigation, and in particular to a device for cutting a standard rock core specimen and a method for using the same. Background Art

[0002] When encountering rock formations during geotechnical engineering investigations, in order to obtain relevant parameters of the rock formations, in addition to conducting field tests, it is mainly necessary to collect a certain number of rock core samples and send them to the laboratory, which processes the core samples into specimens that meet the test requirements (the specimens are divided into saturated, dry and natural states), and then conduct various tests to obtain parameter indicators. Among them, the saturated uniaxial compressive strength index of rock is one of the most important mechanical parameters. At present, the national and industry rock test specifications require the size of rock uniaxial compressive strength test specimens to be standard specimens, that is, the specimen is a cylinder with a diameter of 50mm and a height-to-diameter ratio of 2.0 to 2.5.

[0003] The diameters and lengths of rock core samples drilled from the field vary. Before conducting the uniaxial compressive strength test of rock in the laboratory, the original rock core samples drilled from the field must first be cut, rounded, and flattened using a diamond machine, stone cutter, grinder, etc. to make specimens that meet the test requirements. Then, the uniaxial compressive strength test of rock is conducted according to engineering requirements.

[0004] Traditional rock cutting and other sampling methods have the following disadvantages: 1. The rock cutter can only cut the core length and cannot control the core diameter, so the laboratory can only cut the core samples received into 1:1 or 2:1 non-standard core specimens for testing, and then use empirical formulas to convert the test results into standard specimens. 1. Because it is a non-standard specimen, the accuracy of the test parameters is affected; 2. The rock cutter will generate a lot of dust during cutting, which seriously affects the health of the operator and the surrounding environment; although some are equipped with a water spray head, the dust still cannot be completely dropped due to the fast rotation speed of the blade during cutting, and the residual dust will still fly into the air with the rotating airflow of the blade; 3. The rock cutter has no noise reduction measures and will make a lot of noise during cutting. Although the operator is equipped with earplugs, the huge noise still seriously affects the hearing and causes great pollution to the surrounding personnel and the environment; 4. The rock cutter is generally exposed to the operation, with only partial protection around the blade. In addition, the rock chips will fly everywhere during cutting, which poses a great safety hazard to the operator; 5. The operator needs to hold the operating handle to work during the cutting process of the rock cutter, which is time-consuming and laborious; 6. When cutting natural core samples and soft rocks such as mudstone, it is not suitable to use a water spray head during cutting, and the dust cannot be controlled to fly everywhere. Summary of the invention

[0005] The purpose of the present invention is to provide a device for cutting standard rock core specimens and a method for using the device, which can not only meet the requirements for cutting samples under different test conditions, but also play a role in preventing dust and noise and reducing harm to operators and the environment.

[0006] In order to achieve the above-mentioned purpose, on the one hand, the present invention provides a device for cutting standard rock core specimens, including a frame, a water tank and a control cabinet are arranged on the frame, two groups of electric push rods are installed on the top of the frame, one group of electric push rods is connected to the first cover plate, the cutting motor and the cutting table, and the other group of electric push rods is connected to the second cover plate, the core drilling rig and the rotary cutting table, the water tank is divided into a large water tank and a small water tank, one group of electric push rods pushes the cutting table and the cutting motor into the large water tank, the first cover plate covers the large water tank after being pushed, and the cutting motor cuts the core sample placed on the cutting table to a standard length in the large water tank, the other group of electric push rods pushes the rotary cutting table into the small water tank, the second cover plate covers the small water tank after being pushed, and the core motor cuts the core sample placed on the rotary cutting table to a standard diameter in the small water tank.

[0007] Furthermore, a double-leaf blade is connected to the bottom of the cutting motor, the double-leaf blade consists of two blades, the spacing between the blades is the standard rock sample length, and a plurality of springs are arranged at the bottom of the cutting motor, and the springs are connected to the protective plate.

[0008] Furthermore, the lower end of the core drilling rig is connected to a core cutter head, and the core cutter head is a long cylindrical structure with a standard diameter and a tooth-shaped top.

[0009] Furthermore, the first cover plate and the second cover plate are both provided with blade holes for accommodating the up and down movement of the double-blade blade and the core cutter head when cutting the core sample, and the protective plate covers the blade hole on the first cover plate during cutting.

[0010] Furthermore, the cutting table is a rectangular disc-shaped structure, and a trough body for cutting core samples is provided in the middle of the cutting table. The upper and lower bottom edges of the trough body protrude to the outside of the cutting table, and a limit frame, a U-shaped fixing support, a U-shaped slider and a screw-in bolt are provided in the trough body. The U-shaped fixing support is fixed to one end of the limit frame, and the U-shaped slider is provided in the limit frame. One side of the U-shaped slider is screwed to the screw-in bolt, and the screw-in bolt pushes the slider to slide back and forth in the limit frame by rotating. Rectangular cutting holes are provided on both sides of the trough body to accommodate the double-leaf blade to pass through.

[0011] Furthermore, the rotary cutting table is a rectangular disc structure, and a concave core groove is provided in the middle of the rotary cutting table. A limit frame, a U-shaped fixing support, a U-shaped slider and a screw bolt are provided in the rotary cutting table. The U-shaped fixing support is fixed at one end in the limit frame, and the U-shaped slider is arranged in the limit frame. One side of the U-shaped slider is screwed to the screw bolt, and the screw bolt pushes the slider to slide back and forth in the limit frame by rotating.

[0012] Furthermore, a water inlet and a water outlet are provided on the outside of the water tank, a water level indicator plate and a dust suction plate are provided on the inside of the water tank, and the dust suction plate is connected to the dust suction device.

[0013] Furthermore, a power control box and a dust suction device are arranged in the control cabinet, and a control panel is arranged on the control cabinet. The control panel is provided with several switches for respectively controlling the operation of the electric push rod, the cutting motor, the core drilling rig and the dust suction device.

[0014] Furthermore, universal wheels are installed at the bottom of the control cabinet.

[0015] On the other hand, the present invention also provides a method for using the above device, comprising the following steps:

[0016] Place the core sample to be cut on the cutting table, turn the screw bolt to push the U-shaped slider in the limit frame toward the core sample until the core sample is fixed between the U-shaped slider and the U-shaped fixing support;

[0017] Open the water inlet and fill the water tank to the water level indicator plate;

[0018] The electric push rod is started to push the cutting table with the original core sample to below the water surface of the large water tank, and the first cover plate connected to the electric push rod closes the opening of the large water tank;

[0019] Start the electric push rod to push the cutting motor toward the water tank. The double-blade blade at the bottom of the cutting motor enters the large water tank from the blade hole on the first cover plate. The protective plate connected to the cutting motor through the spring seals the blade hole, thus sealing the entire large water tank.

[0020] Start the cutting motor to complete the cutting of the core sample of standard length;

[0021] Take the core sample from the cutting table and install it on the rotary cutting table according to the above steps;

[0022] The electric push rod is started to push the rotary cutter to below the water surface of the small water tank, and the second cover plate connected to the electric push rod closes the opening of the small water tank;

[0023] Start the core drill rig descending switch, push the core drill rig with the core cutter head toward the small water tank, and the core cutter head enters the small water tank through the blade hole on the second cover plate;

[0024] Start the core drill to drive the core cutter head to rotate at high speed and cut into the core sample. When the core cutter head enters the core groove, the cutting is completed;

[0025] Then take out the cut core sample of standard length and diameter, and the whole sample preparation work is completed.

[0026] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0027] 1. Two cutting frames, cutting table combination and sample preparation combination, can be used to cut standard specimens whose length and diameter meet the requirements of the specifications, thereby improving the accuracy of the test results.

[0028] 2. The sample is prepared in a closed manner in water using large and small water tanks to achieve dust-free sample preparation and effectively reduce the noise generated during the sample preparation process and the impact on surrounding personnel and the environment.

[0029] 3. For natural core samples and mudstone core samples that cannot be added with water, the dust suction device can be turned on to absorb the dust generated during cutting, which can effectively prevent the pollution of dust to people and the environment, and achieve high efficiency and environmental protection effects.

[0030] 4. The cutting work of the double-blade blade and the core cutter head is controlled by the motor and the electric push rod, which saves manpower and improves efficiency.

[0031] 5. The entire core cutting process is carried out in a closed box, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 The present invention is a front view of a device for cutting a standard rock core specimen.

[0034] Figure 2 The figure is a side view of a device for cutting a standard rock core specimen according to the present invention (core tube).

[0035] Figure 3 It is a side view of a device for cutting a standard rock core specimen according to the present invention (double-blade blade).

[0036] Figure 4 It is a top view of the water tank cover of the present invention.

[0037] Figure 5 It is a top view of the rotary cutting table of the present invention.

[0038] Figure 6 It is a top view of the cutting table of the present invention.

[0039] Figure 7 The present invention is a cross-sectional view of a device for cutting a standard rock core specimen.

[0040] Figure 8 The present invention is a horizontal cross-sectional view of a device for cutting a standard rock core specimen.

[0041] Fig. 9 It is a cross-sectional schematic diagram of the water tank and the control cabinet of the present invention.

[0042] The figure includes: 1-electric push rod assembly; 2-frame; 3-fixing rod; 4-core cutter head; 5-cutting motor; 6-protective plate; 7-spring; 8-second cover plate; 9-first cover plate; 10-double-leaf blade; 11-rotary cutting table; 12-cutting table; 13-water level indicator plate, 14-dust suction plate; 15-water inlet; 16-water outlet; 17-switch combination; 18-control cabinet; 19-door handle; 20-cabinet door; 21-universal wheel; 22-core drilling rig; 23-water tank; 24-U-shaped slider; 25-U-shaped fixing support; 26-screwing bolt; 27-rock sample slot; 28-double-leaf blade hole; 29-core cutter head hole; 30-cover plate connecting pad; 31-connecting hole; 32-limiting frame; 33-cutting hole; 34-power control box; 35-dust suction control box. DETAILED DESCRIPTION

[0043] 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.

[0044] In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0046] like Figure 1 , Figure 2 and Figure 3 The figures are respectively a front view of a device for cutting a standard rock core specimen, a side view of a core tube, and a side view of a double blade blade. As shown in the figure, the cutting device for a standard geotechnical core specimen of the present invention comprises a frame 2 and a bracket 3, and the frame 2 and the bracket 3 connect an electric push rod 1, a core drill 22, a cutting motor 5, a water tank 23, and a control cabinet 18 into a whole.

[0047] Specifically, the electric push rod 1 is a plurality of groups. The electric push rod 1 is respectively connected with the second cover plate 8, the first cover plate 9, the cutting motor 5, the rotary cutting table 11 and the cutting table 12 to control its up and down movement. It should be noted that the electric push rod 1 can also adopt a transmission rod of other transmission structures, such as an oil rod, a hydraulic rod, etc., which is not limited here.

[0048] Specifically, the core drill 22 is embedded in the frame 2, and the lower end is screwed with a core cutter head 4 of standard diameter for cutting core samples of standard diameter. The core cutter head 4 is a long cylindrical structure of standard diameter, and the top end is tooth-shaped. The core drill 22 is used to rotate the core cutter head 4 at high speed and move downward to quickly cut the core sample, completing the cutting work of the marked diameter of the core standard specimen.

[0049] Specifically, the bottom of the cutting motor 5 is connected to a double-blade blade 10, and the distance between the two blades is a standard length, which is used to cut a core sample of standard length. Four springs 7 are welded to the lower part of the cutting motor 5 and connected to a protective plate 6. When the double-blade blade 10 enters the water tank, it just covers the blade hole in the middle of the upper cover plate of the water tank, forming a closed space, which can protect the motor.

[0050] like Figure 8 The horizontal cross-sectional view of the device is shown, in which the water tank 23 is divided into two boxes, large and small. The rotary cutting table 11 is located in the small box on the left, and the cutting table 12 is located in the large box on the right. The dust suction discs 14 are distributed on both sides of the large and small boxes for absorbing dust.

[0051] Figure 7 is a cross-sectional view of the device. Figure 7 As shown, the water tank 23 is located on the control cabinet 18, and the water tank 23 is divided into a large water tank and a small water tank. The electric push rod 1 pushes the cutting table 12 and the cutting motor 5 into the large water tank, and the first cover plate 9 is pushed to cover the large water tank. The cutting motor 5 cuts the core sample placed on the cutting table 12 to a standard length in the large water tank. The electric push rod 1 pushes the rotary cutting table 11 into the small water tank, and the second cover plate 8 is pushed to cover the small water tank. The core motor 22 cuts the core sample placed on the rotary cutting table 11 to a standard diameter in the small water tank.

[0052] In this embodiment, water inlets 15 and water outlets 16 are installed on the upper and lower sides of the water tank 23, which can be used to fill and drain water in the water tank 23 for cutting and preparing samples in water. Water level indicator plates 13 are also installed on the upper sides of the water tank 23 to control the water filling height. The water filling height can also be detected by sensors or other methods, which are not limited here.

[0053] In this example, dust collecting plates 14 are provided on both sides of the water tank 23 to absorb dust during waterless cutting. If dry sample preparation is required, the dust collecting device can be turned on during the sample preparation process, and all dust generated during the sample preparation process can be recovered through the dust collecting plates 14.

[0054] like Fig. 9 As shown, the control cabinet 18 is equipped with universal wheels at the bottom, which can be easily fixed, moved and carried. The control cabinet is equipped with a cabinet door 20 and a door handle 19 for maintenance. A switch combination 17 is provided on the upper part of the control cabinet panel to control the operation of the entire device. The power control box and the dust control box are placed in the control cabinet 18, and the switch combination 17 on the connection panel controls the operation of the electric push rod 1, the cutting motor 5, the core drill 22 and the dust collection device respectively. The power line is connected to the power box 35 in the control cabinet 18 through the cavity in the frame 2 and the support rod 3.

[0055] like Figure 4 The figure shows a schematic diagram of a water tank cover, which is divided into a first cover 9 and a second cover 8. The second cover 8 is used to cover the small water tank 23, wherein a circular core cutter head hole 29 is left in the middle of the second cover 8 for the core cutter head 4 to rotate up and down into the water tank 23 to cut rock samples. A rectangular double-leaf blade hole 28 is left in the middle of the first cover 9 for the double-leaf blade 10 to move up and down into and out of the water tank to cut rock samples.

[0056] In this embodiment, the first cover plate 9 and the second cover plate 8 are welded to the electric push rod 1 by using cover plate connection pads 30. The first cover plate 9 and the second cover plate 8 can also be connected and fixed to the electric push rod 1 by other methods, which are not limited here.

[0057] like Figure 5 The diagram shows a combined schematic diagram of a rotary cutting platform. The rotary cutting platform 11 is a rectangular disc-shaped structure with connecting holes 31 on both sides, which are connected to the electric push rod 1. A concave core groove 27 is provided in the middle of the rotary cutting platform 11 for the core cutter head 29 to cut through the core. A U-shaped fixed support 25, a U-shaped slider 24, a limit frame 32, and a screw bolt 26 are arranged in the rotary cutting platform 11. The U-shaped fixed support 25 is fixed to one end of the limit frame 32, and the U-shaped slider 24 is arranged in the limit frame 32. One side of the U-shaped slider 24 is screwed to the screw bolt 26, and the screw bolt 26 pushes the slider 24 to slide back and forth in the limit frame 32 by rotation.

[0058] like Figure 6The figure shows a schematic diagram of the cutting table assembly. The cutting table 12 is a rectangular disc-shaped structure. Connection holes 31 are provided on both sides of the cutting table 12, which are connected to the electric push rod 1. A trough body for cutting core samples is provided in the middle of the cutting table 12, and the upper and lower bottom edges of the trough body protrude to the outside of the cutting table. A limit frame 32, a U-shaped fixed support 25, a U-shaped slider 24 and a screw bolt 26 are provided in the trough body. The U-shaped fixed support 25 is fixed to one end of the limit frame 32, and the U-shaped slider 24 is provided in the limit frame 32. One side of the U-shaped slider 24 is screwed to the screw bolt 26, and the screw bolt 26 pushes the slider 24 to slide back and forth in the limit frame 32 by rotation. Rectangular cutting holes 33 are provided on both sides of the trough body to accommodate the double-leaf blade to pass through.

[0059] On the other hand, the present invention also provides a method for using a device for cutting a standard rock core specimen, comprising the following steps:

[0060] Before starting the test, first brake the universal wheel 21 to fix the entire device, put the electric push rod 1, the core drill 22, the cutting motor 5, the rotary cutting table 11 and the cutting table 12 in the starting position, and put the core sample to be cut horizontally into the cutting table 11 or vertically into the rotary cutting table 12, that is, between the U-shaped fixed support 25 and the limiting frame 32. At this time, twist the screw bolt 26 to push the U-shaped slider 24 located in the middle of the limiting frame 32 to squeeze the core sample until the core sample is tightly fixed between the U-shaped slider 24 and the U-shaped fixed support 25.

[0061] When conducting underwater sample preparation, connect the water source and open the water inlet 15, and fill the large and small boxes of the water tank 23 with water to the water level indicator plate 13, and the preparation work is completed. First, cut the core sample of standard length, press the switch 17 under the large water tank, start the electric push rod 1, push the cutting table 12 loaded with the original core sample into the large box of the water tank 23 and stop at a predetermined position below the water surface. At this time, the second water tank cover 9 welded to the electric push rod 1 just covers the large box of the water tank 23, and then press the switch 17, start the electric push rod 1, and push the cutting motor 5 with the double-leaf blade 10 and the spring 7 fixed at the lower end of the push rod to the water tank 23. When the double-leaf blade 10 is removed from the large water tank cover, the cutting motor 5 with the double-leaf blade 10 and the spring 7 fixed at the lower end of the push rod is pushed to the water tank 23. When the blade hole 28 left in the middle of the plate 9 enters the large box and contacts the core sample, the protective cover plate 6 connected to the spring 7 just seals the blade hole and seals the entire water tank. At this time, the cutting motor switch 17 is pressed to start the cutting motor 5. The double-blade blade 10 starts to cut the core sample under the control of the electric push rod 1 and the motor 5. When the double-blade blade cuts the core and enters the cutting hole 33, the electric push rod 1 stops. At this time, the standard length core sample has been cut. Press the switch 17 to lift and reset each device. Take out the cut standard length core sample and install it on the rotary cutting table 11 according to the above steps to start cutting the standard diameter core sample. Press the switch 17 below the small water tank, and push the cutting table 11 into the water tank 23 small box body through the electric push rod 1 to stop at a predetermined position below the water surface. At this time, the first water tank cover 9 welded on the electric push rod 1 just covers the small box body of the water tank 23. Then press the core drill rig descending switch 17, start the core drill rig 23 with the core cutter head 4 to push it into the water tank, and push the core cutter head into the small box body from the core cutter head hole 29 left in the middle of the first cover plate 9. At this time, the small water tank cover plate 8, the core cutter head 4 and the small box body form a closed space. At this time, start the core drill rig rotary cutting switch 17, drive the core cutter head 4 to high-speed rotary cutting into the core sample. When the core cutter head enters the core groove 27, the cutting is completed, press the switch 17, and each device is lifted and reset. Then the core specimen of standard length and diameter after cutting is removed for subsequent tests, and the entire sample preparation work is completed.

[0062] When waterless drying is required, the water injection step is omitted, and the rotary cutting table 11 or the cutting table 12 is placed in the water tank according to the above steps. When the double blade blade 10 or the core cutter head 4 starts to cut or rotary cut the core sample, the vacuum cleaner switch 17 is pressed to start the dust collecting disc 13. At this time, the core sample is cut while the dust generated by the cutting is sucked. When the cutting is completed and the dust is completely sucked, the switch 17 is pressed to stop the dust collection work, and each device is lifted and reset, and then the core specimens of standard length and diameter that have been cut are removed and reserved for subsequent tests, and the entire sample preparation work is completed.

[0063] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person of ordinary skill in the art can change, modify, replace and modify the above embodiments within the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for cutting standard rock core specimens, comprising a frame, on which a water tank and a control cabinet are arranged, characterized in that: Two groups of electric push rods are installed on the top of the frame, one group of electric push rods is connected to the first cover plate, the cutting motor and the cutting table, and the other group of electric push rods is connected to the second cover plate, the core drill and the rotary cutting table. The lower end of the core drill is connected to the core cutter head, and the core cutter head is a long cylindrical structure with a standard diameter and a toothed top. The water tank is divided into a large water tank and a small water tank. One group of electric push rods pushes the cutting table and the cutting motor into the large water tank. The first cover plate covers the large water tank after being pushed. The cutting motor cuts the core sample placed on the cutting table to a standard length in the large water tank. The bottom of the cutting motor A double-leaf blade is connected, and the double-leaf blade consists of two blades, and the spacing between the blades is the standard rock sample length. Several springs are arranged at the lower part of the cutting motor, and the springs are connected to the protective plate. Another set of electric push rods pushes the rotary cutting table into the small water tank, and the second cover plate covers the small water tank after being pushed. The core drilling rig cuts the core sample placed on the rotary cutting table with a standard diameter in the small water tank. Blade holes are provided on the first cover plate and the second cover plate to accommodate the up and down movement of the double-leaf blade and the core cutter head when cutting the core sample, and the protective plate covers the blade hole on the first cover plate during cutting.

2. A device for cutting a standard rock core specimen according to claim 1, characterized in that: The cutting table is a rectangular disc-shaped structure, and a trough body for cutting core samples is provided in the middle of the cutting table. The upper and lower bottom edges of the trough body protrude to the outside of the cutting table, and a limit frame, a U-shaped fixing support, a U-shaped slider and a screw-on bolt are provided in the trough body. The U-shaped fixing support is fixed to one end in the limit frame, and the U-shaped slider is provided in the limit frame. One side of the U-shaped slider is screwed to the screw-on bolt, and the screw-on bolt pushes the slider to slide back and forth in the limit frame by rotation. Rectangular cutting holes are provided on both sides of the trough body to accommodate the passage of the double-leaf blade.

3. A device for cutting a standard rock core specimen according to claim 1, characterized in that: The rotary cutting table is a rectangular disc structure, with a concave core groove in the middle of the rotary cutting table. A limit frame, a U-shaped fixing support, a U-shaped slider and a screw bolt are arranged inside the rotary cutting table. The U-shaped fixing support is fixed to one end of the limit frame, and the U-shaped slider is arranged in the limit frame. One side of the U-shaped slider is screwed to the screw bolt, and the screw bolt pushes the slider to slide back and forth in the limit frame by rotating.

4. A device for cutting a standard rock core specimen as claimed in claim 1, characterized in that: A water inlet and a water outlet are arranged on the outside of the water tank, a water level indicator plate and a dust suction disc are arranged on the inside of the water tank, and the dust suction disc is connected to the dust suction device.

5. The device for cutting a standard rock core specimen according to claim 1, characterized in that: The control cabinet is provided with a power control box and a dust collecting device, and the control cabinet is provided with a control panel. The control panel is provided with several switches for respectively controlling the operation of the electric push rod, the cutting motor, the core drilling machine and the dust collecting device.

6. A device for cutting a standard rock core specimen as claimed in claim 1, characterized in that: The bottom of the control cabinet is equipped with universal wheels.

7. A method for using a device for cutting a standard rock core specimen according to claim 1, characterized in that: The following steps are involved: Place the core sample to be cut on the cutting table, turn the screw bolt to push the U-shaped slider in the limit frame toward the core sample until the core sample is fixed between the U-shaped slider and the U-shaped fixing support; Open the water inlet and fill the water tank to the water level indicator plate; The electric push rod is started to push the cutting table with the original core sample to below the water surface of the large water tank, and the first cover plate connected to the electric push rod closes the opening of the large water tank; Start the electric push rod to push the cutting motor toward the water tank. The double-blade blade at the bottom of the cutting motor enters the large water tank from the blade hole on the first cover plate. The protective plate connected to the cutting motor through the spring seals the blade hole, thus sealing the entire large water tank. Start the cutting motor to complete the cutting of the core sample of standard length; Take the core sample from the cutting table and install it on the rotary cutting table according to the above steps; The electric push rod is started to push the rotary cutter to below the water surface of the small water tank, and the second cover plate connected to the electric push rod closes the opening of the small water tank; Start the core drill rig descending switch, push the core drill rig with the core cutter head toward the small water tank, and the core cutter head enters the small water tank through the blade hole on the second cover plate; Start the core drill to drive the core cutter head to rotate at high speed and cut into the core sample. When the core cutter head enters the core groove, the cutting is completed; Then take out the cut core sample of standard length and diameter, and the whole sample preparation work is completed.

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