A rock drillability tester

Abstract

The invention discloses a rock drillability tester, comprising a control unit and an action unit, wherein the control unit is a host computer control box; the action unit is a rock drilling pressure device, comprising a bottom plate, a middle plate, a top plate and a connecting column, wherein the connecting column passes through the middle plate to connect the bottom plate with the top plate, wherein the middle plate is movably arranged on the connecting column and is connected to the top plate through a height adjustment mechanism, a drilling pressure test mechanism is arranged on the middle plate, the bottom plate is fixedly connected to the connecting column, and a specimen fixing mechanism is arranged on the bottom plate, which is arranged just below the drilling pressure test mechanism and is used in conjunction with the specimen; when the rock drillability tester is in use, the rock drilling pressure device can be controlled by the host computer control box to perform drilling pressure on the rock, and then the time corresponding to the instantaneous drilling depth can be tested by using a high-precision depth displacement sensor, thereby determining the drillability grade value of the rock, and accurately completing the rock drillability classification, and has the characteristics of simple use, high degree of automation and high precision.

Description

Technical Field

[0001] The invention relates to the technical field of rock and petrological exploration equipment, and in particular to a rock drillability tester. Background Art

[0002] The rapid development of the geological drilling industry is inseparable from the preliminary investigation of the structural characteristics of domestic geological rock formations and the distribution of rocks. In my country, fine sandstone layers are mainly distributed in the Yangtze River Delta Plain and the abandoned Yellow River channel area in northern Jiangsu, fine sandstone layers are distributed in the Lixiahe and Taihu areas, gravelly medium-coarse sandstone layers are mainly distributed in the area north of the Huaihe River, sub-sandstone layers are mainly distributed in the Yangtze River Delta Plain, the Yellow River flooding area and the coastal areas, clay layers are distributed throughout the province, and sub-clay layers are widely distributed throughout the province except for the coastal areas and the Yangtze River Delta. In the process of rock geological exploration, the detection and experiment of various petrological properties of rocks are indispensable technical means in this field.

[0003] In the process of rock petrological property survey, rock drillability refers to the ability of rock to resist drilling and crushing. It reflects the difficulty of drilling holes and is a quantitative indicator of the rock's ability to resist mechanical crushing during drilling. It is the main basis for selecting drilling methods, drill bit structure types, drilling process parameters, measuring drilling speed and implementing quota management in engineering drilling.

[0004] However, in the existing technologies and experimental equipment, there is no experimental equipment that can be specifically used for rock drillability experiments. Therefore, it is urgent to design an experimental equipment that can be specifically used for rock drillability experiments. Summary of the Invention

[0005] In response to the above-mentioned problems, the present invention aims to provide a rock drillability tester. When in use, the rock drillability tester can control the rock drilling pressure device through the upper computer control box to apply drilling pressure to the rock, and then use the high-precision depth displacement sensor to test the time corresponding to the instantaneous drilling depth, thereby determining the drillability grade value of the rock and accurately completing the rock drillability classification. The rock drillability tester is simple to use, highly automated and highly precise.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A rock drillability tester comprises a control unit and an action unit, wherein the control unit is connected to the action unit to control the operation of the action unit;

[0008] The action unit is a rock drilling pressure device, including a bottom plate, a middle plate, a top plate and a connecting column, wherein the connecting column passes through the middle plate to connect the bottom plate and the top plate, wherein the middle plate is movably arranged on the connecting column and is connected to the top plate through a height adjustment mechanism, and a drilling pressure test mechanism is provided on the middle plate, the bottom plate is arranged at the lower end of the connecting column and is fixedly connected to the connecting column, and a specimen fixing mechanism is provided on the bottom plate, the specimen fixing mechanism is arranged directly below the drilling pressure test mechanism and is used in conjunction with the specimen;

[0009] The specimen fixing mechanism includes a specimen plate, a mounting seat, a coupling shaft, a crank arm, a pressing support, a fixed plate and an adjusting member, wherein the adjusting member is movably sleeved on the support column and used in conjunction with a positioning cylinder provided on the positioning plate, one end of the coupling shaft is connected to a positioning groove provided on the adjusting member through a hinge shaft, the other end of the coupling shaft is hinged to one end of the crank arm, the crank arm is rotatably arranged between two symmetrically arranged mounting seats, and the other end of the crank arm is hingedly connected to the pressing support, the fixed plate is arranged on the pressing support and used in conjunction with the specimen;

[0010] The adjusting member is movably arranged on the upper side of the positioning cylinder, and a rubber seal is embedded in the inner side of the adjusting member. The rubber seal is movably connected to the support column through a sealing ring. The lower end limit plate of the rubber seal extends into the internal cavity of the positioning cylinder and moves up and down along the internal cavity of the positioning cylinder. The positioning cylinder is also provided with a pressurizing hole, which is connected to the internal cavity of the rubber seal.

[0011] The drilling pressure test mechanism includes an L-shaped fixing plate, a connecting plate, a limiting fixing part, a drilling pressure assembly, a hydraulic cylinder, a switching connecting part, a motor and a drill rod, and a drilling assembly is provided at the lower end of the drill rod; the drilling assembly includes a micro drill bit and a drill bit mounting mechanism, the micro drill bit is mounted on the front end of the drill rod through the drill bit mounting mechanism, and the drill bit mounting mechanism includes a collet, a tightening screw, a third bevel gear and a fourth bevel gear; the meshing force between the fourth bevel gear and the third bevel gear is used to make the tightening screw drive the collet to move along the mounting cavity, so as to realize the clamping and fixation of the micro drill bit by the collet.

[0012] Preferably, the fixing plate is symmetrically mounted on the middle plate by bolts, the connecting plate is mounted between the two fixed plates by bolts, and is used in conjunction with the height adjustment mechanism; the limiting fixing member includes an arc-shaped limiting plate and a threaded connecting rod, the threaded connecting rod is arranged on the back side of the arc-shaped limiting plate, and passes through the adjustment slot provided on the L-shaped fixing plate and is used in conjunction with the fastening nut, and a support plate is also provided on the lower side of the arc-shaped limiting plate, and the support plate is used in conjunction with the drilling pressure assembly.

[0013] Preferably, the hydraulic cylinder is installed between two symmetrically arranged limit fixings, controlled by the upper computer control box, and the end of the piston rod of the hydraulic cylinder is rotatably connected to the drill rod through a switching connector, the motor is fixedly arranged on one side of the switching connector, and a first driving gear is provided at the power output end of the motor, the first driving gear is engaged with the second driven gear provided at the end of the drill rod, and the drill rod is driven to rotate by the motor, the drill rod passes through the middle plate through a guide sleeve, and a drilling assembly is provided at the lower end of the drill rod.

[0014] Preferably, the adapter connector is symmetrically provided with a first clamping groove and a second clamping groove, wherein the first clamping groove is connected to the piston rod of the hydraulic cylinder through a connecting pin, and a first bearing is provided in the second clamping groove, and the drill rod is rotatably connected to the second clamping groove through the first bearing.

[0015] Preferably, the collet is movably mounted in the mounting cavity at the front end of the drill rod, and the rear end of the collet is threadedly connected to the tightening screw, the tightening screw is mounted in the internal cavity of the drill rod through a third bearing, the third bevel gear is mounted at the tail end of the tightening screw, and meshes with the fourth bevel gear, the fourth bevel gear is mounted in the drill rod through a connecting rod and a bearing, and a hexagonal slot is provided on the fourth bevel gear, and the hexagonal slot is used in conjunction with the hexagonal insert rod provided on the adjusting rod.

[0016] Preferably, the mounting cavity is a trapezoidal mounting groove with a large opening and a small interior, and the collet includes a threaded connection sleeve and an arc-shaped clip, and the threaded connection sleeve is used in conjunction with the tightening screw, and the arc-shaped clip is symmetrically arranged at the front end of the threaded connection sleeve, and a trapezoidal gap is formed between the two arc-shaped clips, and a spiral limiting protrusion is also provided on the inner side of the arc-shaped clip, and the limiting protrusion is used in conjunction with the micro drill bit; and a tightening nut is also provided on the drill rod, and the tightening nut is used in conjunction with the collet.

[0017] Preferably, the height adjustment mechanism includes an adjusting disk, an adjusting rod and a turntable. The adjusting rod is a threaded rod and is threadedly connected to the top plate. The adjusting disk and turntable are respectively arranged at the upper and lower ends of the adjusting rod, and an adjusting handle is provided on the adjusting disk. The adjusting rod is rotatably connected to the connecting plate through a second bearing, and the turntable is used in conjunction with a slot provided on the inner side of the connecting plate.

[0018] The beneficial effects of the present invention are as follows: the present invention discloses a rock drillability tester. Compared with the prior art, the present invention has the following improvements:

[0019] (1) The present invention designs a rock drillability tester, which includes a control unit and an action unit. The control unit is connected to the action unit through a wire to control the action unit to work. The action unit is a rock drilling pressure device, and a height adjustment mechanism, a test piece fixing mechanism and a drilling assembly are provided on the rock drilling pressure device. When in use, the rock drilling pressure device can be controlled by the upper computer control box to perform drilling pressure on the rock, and then the time corresponding to the instantaneous drilling depth can be tested by a high-precision depth displacement sensor, thereby determining the drillability grade value of the rock. The rock drillability grade value can be accurately completed, and the rock drillability grade value has the advantages of being simple to use, automatically controlling the drilling process and having high test accuracy.

[0020] (2) When the height adjustment mechanism is in use, the height of the overall drilling pressure test mechanism can be adjusted by manually rotating the adjustment disk according to the requirements of rock specimens of different sizes, making it convenient to conduct drilling tests on rock specimens. The adjustment is flexible and convenient, and can be used for drilling into rock samples of multiple specifications;

[0021] (3) The drilling pressure test mechanism can be used in accordance with the industry standard (SY / T5462-2000) to give the drill bit a stable static load pressure through the hydraulic cylinder, and then the motor drives the micro drill bit to drill the formation rock sample fully automatically. The servo motor is controlled by high-precision variable speed computer control software, and the time corresponding to the instantaneous drilling depth is tested by a high-precision depth displacement sensor, thereby determining the drillability grade of the rock and accurately completing the task of rock drillability classification.

[0022] (4) When the drilling assembly is in use, the drill bit can be quickly disassembled and installed, which facilitates the timely replacement of different types of micro drill bits, saving time and effectively improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the rock drillability tester of the present invention.

[0024] Figure 2 It is a structural schematic diagram of the bit pressure test mechanism of the present invention.

[0025] Figure 3 It is a cross-sectional view of the bit pressure test mechanism of the present invention.

[0026] Figure 4 It is a structural schematic diagram of the fixing plate of the present invention.

[0027] Figure 5 It is a structural schematic diagram of the position limiting fixing member of the present invention.

[0028] Figure 6 This is a cross-sectional view of the adapter connector of the present invention.

[0029] Figure 7 It is a structural schematic diagram of the height adjustment mechanism of the present invention.

[0030] Figure 8 It is a cross-sectional view of the drilling assembly of the present invention.

[0031] Figure 9 It is a structural schematic diagram of the collet of the present invention.

[0032] Figure 10 Schematic diagram I of the structure of the specimen fixing mechanism of the present invention.

[0033] Figure 11 Schematic diagram II of the structure of the specimen fixing mechanism of the present invention.

[0034] Figure 12 It is a cross-sectional view of the specimen fixing mechanism of the present invention.

[0035] Figure 13 It is a partial enlarged view of the specimen fixing mechanism A of the present invention.

[0036] Figure 14 It is a structural schematic diagram of the crank arm of the present invention.

[0037] Wherein: 1. WOB test mechanism, 11. Fixing plate, 111. Adjusting groove, 12. Connecting plate, 13. Hydraulic cylinder, 14. Positioning fixture, 141. Arc-shaped position-limiting plate, 142. Support plate, 143. Threaded connecting rod, 144. Fastening nut, 15. Adapter connector, 151. First clamping groove, 152. Second clamping groove, 153. First bearing, 16. Second driven gear, 17. First drive gear, 18. Guide sleeve, 2. Bottom plate, 21. Positioning hole, 22. Support ring, 3. Middle plate, 31. Middle plate socket hole, 4. Top plate, 5. Connecting column, 6. Drill rod, 61. Mounting cavity, 7. Height adjustment mechanism, 71. Adjusting plate, 72. Adjusting handle, 73. Adjusting rod, 74. Second bearing, 75. Turntable, 8. Specimen fixing mechanism, 81. Positioning plate, 811. Positioning cylinder, 812. Pressurized hole, 82. Casing, 83. Specimen plate, 84. Mounting seat, 85. Coupling, 86. Crank arm, 87. Pressurized support, 871. Fixed plate, 88. Adjusting piece, 881. Positioning groove, 89. Support column, 891. Rubber seal, 892. Sealing ring, 9. Drilling assembly, 91. Micro drill bit, 92. Collet, 921. Threaded sleeve, 93. Arc clip, 931. Limiting protrusion, 94. Tightening nut, 95. Tension screw, 96. Third bearing, 97. Third bevel gear, 98. Fourth bevel gear, 99. Hexagonal slot, 90. Hexagonal insert, 10. Upper computer control box, 101. Specimen. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0039] Refer to the attached Figure 1-14 The rock drillability tester shown includes a control unit and an action unit. The control unit is connected to the action unit through a wire and a wire tube. When in use, the action unit is controlled by the control unit.

[0040] The control unit is a host computer control box 10, the input end of the host computer control box 10 is connected to the pressure pump and the power supply box, and the host computer control software is embedded in the host computer control box 10 to control the operation of the action unit;

[0041] The action unit is a rock drilling pressure device, including a bottom plate 2, a middle plate 3, a top plate 4 and a connecting column 5. The connecting column 5 passes through the middle plate 3 to connect the bottom plate 2 with the top plate 4, wherein the middle plate 3 is movably set on the connecting column 5 and is connected to the top plate 4 through a height adjustment mechanism 7. When in use, the relative distance between the middle plate 3 and the top plate 4 is adjusted by the height adjustment mechanism 7, and a drilling pressure test mechanism 1 for drilling pressure rock test block 101 is provided on the middle plate 3. The bottom plate 2 is set at the lower end of the connecting column 5 and is fixedly connected to the connecting column 5. A specimen fixing mechanism 8 is provided on the bottom plate 2. The specimen fixing mechanism 8 is set directly below the drilling pressure test mechanism 1 and is used in conjunction with the specimen 101 to fix the specimen 101.

[0042] Preferably, in order to facilitate drilling pressure on the rock specimen 101, the drilling pressure test mechanism 1 includes an L-shaped fixing plate 11, a connecting plate 12, a limiting fixing piece 14 and a drilling pressure assembly, the fixing plate 11 is symmetrically mounted on the middle plate 3 by bolts, the connecting plate 12 is mounted between the two fixed plates 11 by bolts, and is used in conjunction with the height adjustment mechanism 7 to adjust the height of the entire drilling pressure test mechanism 1; the limiting fixing piece 14 includes an arc-shaped limiting plate 141 and a threaded connecting rod 143, the threaded connecting rod 143 is arranged on the back side of the arc-shaped limiting plate 141, and passes through the adjustment slot 111 provided on the L-shaped fixing plate 11 and is used in conjunction with a fastening nut 144, that is, the limiting fixing piece 14 is connected to the fixing plate 11 by the cooperation of the fastening nut 144 and the threaded connecting rod 143, and a support plate 142 is further provided on the lower side of the arc-shaped limiting plate 141, and the support plate 142 is used in conjunction with the drilling pressure assembly to support the hydraulic cylinder 13 of the drilling pressure assembly.

[0043] Preferably, the drilling pressure assembly includes a hydraulic cylinder 13, an adapter connector 15, a motor and a drill rod 6. The hydraulic cylinder 13 is installed between two symmetrically arranged limit fixings 14 and is controlled by the upper computer control box 10. The end of the piston rod of the hydraulic cylinder 13 is rotatably connected to the drill rod 6 through the adapter connector 15, that is, the drill rod 6 is driven up and down by the hydraulic cylinder 13. The motor is fixed on one side of the adapter connector 15, and a first driving gear 17 is provided at the power output end of the motor. The first driving gear 17 is engaged with the second driven gear 16 provided at the end of the drill rod 6, that is, the drill rod 6 is driven to rotate by the motor when in use. The drill rod 6 passes through the middle plate 3 through the guide sleeve 18. The guide sleeve 18 plays a guiding role, and a drilling assembly 9 is provided at the lower end of the drill rod 6. The drilling assembly 9 is used in conjunction with the test piece 101.

[0044] Preferably, in order to facilitate the use of the adapter connector 15 to connect the limit fixing member 14 to the drill rod 6, the adapter connector 15 is symmetrically provided with a first clamping groove 151 and a second clamping groove 152, wherein the first clamping groove 151 is connected to the piston rod of the hydraulic cylinder 13 through a connecting pin, and a first bearing 153 is provided in the second clamping groove 152, and the drill rod 6 is rotatably connected to the second clamping groove 152 through the first bearing 153.

[0045] Preferably, in order to facilitate the drilling of the drill bit into the test piece 101, the drilling assembly 9 includes a micro drill bit 91 and a drill bit mounting mechanism, the micro drill bit 91 is mounted on the front end of the drill rod 6 through the drill bit mounting mechanism, the drill bit mounting mechanism includes a collet 92, a tightening screw 95, a third bevel gear 97 and a fourth bevel gear 98, the collet 92 is movably mounted in the mounting cavity 61 at the front end of the drill rod 6, and the rear end of the collet 92 is threadedly connected to the tightening screw 95, and the collet 92 is pulled to move along the mounting cavity 61 by rotating the tightening screw 95, and the tightening screw 95 is mounted in the internal cavity of the drill rod 6 through the third bearing 96. The bevel gear 97 is installed at the tail end of the tightening screw 95 and meshes with the fourth bevel gear 98. The fourth bevel gear 98 is installed in the drill rod 6 through a connecting rod and a bearing, and a hexagonal slot 99 is provided on the fourth bevel gear 98. The hexagonal slot 99 is used in conjunction with the hexagonal insert rod 90 provided on the adjusting rod. That is, when adjusting, the hexagonal insert rod 90 is inserted into the hexagonal slot 99 and rotated to rotate the fourth bevel gear 98. The meshing force between the fourth bevel gear 98 and the third bevel gear 97 is used to make the tightening screw 95 drive the collet 92 to move along the mounting cavity 61, so as to realize the clamping and fixation of the micro drill bit 91 by the collet 92.

[0046] Preferably, the mounting cavity 61 is a trapezoidal mounting groove with a large opening and a small interior. The collet 92 includes a threaded connection sleeve 921 and an arc-shaped clip 93. The threaded connection sleeve 921 is used in conjunction with the tightening screw 95. The arc-shaped clip 93 is symmetrically arranged at the front end of the threaded connection sleeve 921, and a trapezoidal clearance gap 922 for making way and clamping is formed between the two arc-shaped clips 93. In order to further play a clamping role, a spiral limiting protrusion 931 is also provided on the inner side of the arc-shaped clip 93, and the limiting protrusion 931 is used in conjunction with the micro drill bit 91; and a tightening nut 94 is also provided on the drill rod 6. The tightening nut 94 is used in conjunction with the collet 92, and is used to adjust the distance between the two arc-shaped clips 93 in advance according to the micro drill bits 91 of different specifications when in use, so that it is suitable for micro drill bits 91 of different specifications.

[0047] Preferably, the height adjustment mechanism 7 includes an adjusting disk 71, an adjusting rod 73 and a turntable 75. The adjusting rod 73 is a threaded rod and is threadedly connected to the top plate 4. The adjusting disk 71 and the turntable 75 are respectively arranged at the upper and lower ends of the adjusting rod 73, and an adjusting handle 72 is provided on the adjusting disk 71. The adjusting rod 73 is rotatably connected to the connecting plate 12 through a second bearing 74, and the turntable 75 is used in conjunction with the card slot provided on the inner side of the connecting plate 12, that is, by rotating the adjusting disk 71, the connecting plate 12 is pulled in the vertical direction through the adjusting rod 73 to adjust the relative distance between the center plate 3 and the top plate 4.

[0048] Preferably, the base plate 2 is fixedly connected to the connecting column 5 through the limiting hole 21, and a support ring 22 is provided on the lower side of the base plate 2. The specimen fixing mechanism 8 is provided on a positioning plate 81 at the upper center position of the base plate 2.

[0049] In order to facilitate the fixing of the specimen 101 during the drilling process, the specimen fixing mechanism 8 includes a specimen plate 83, a mounting seat 84, a connecting shaft 85, a crank arm 86, a pressing support 87, a fixing plate 871 and an adjusting member 88. A support column 89 is provided at the center of the base plate 2. The specimen plate 83 is provided on the top of the support column 89 and is used in conjunction with the specimen 101 to support the specimen 101. The adjusting member 88 is movably sleeved on the support column 89 and is engaged with the positioning cylinder 81 provided on the positioning plate 81. 1, one end of the connecting shaft 85 is hingedly connected to the positioning groove 881 provided on the adjusting member 88 through a hinge shaft, and the other end of the connecting shaft 85 is hingedly connected to one end of the crank arm 86. The crank arm 86 is rotatably arranged between two symmetrically arranged mounting seats 84, and the other end of the crank arm 86 is hingedly connected to the pressing support 87. The fixing plate 871 is arranged on the pressing support 87 and is used in conjunction with the test piece 101. The test piece 101 is clamped and fixed by using three fixing plates 871 distributed in an equiangular triangle.

[0050] Preferably, the adjusting member 88 is movably arranged on the upper side of the positioning cylinder 811, and a rubber seal 891 is embedded on the inner side of the adjusting member 88. The rubber seal 891 is movably connected to the support column 89 through a sealing ring 892. The lower end limit plate of the rubber seal 891 extends into the internal cavity of the positioning cylinder 811, and moves up and down along the internal cavity of the positioning cylinder 811 under the action of high pressure. A pressurized hole 812 is also provided on the positioning cylinder 811. The pressurized hole 812 is connected to the internal cavity of the rubber seal 891 and is used to pressurize the inside of the rubber seal 891 so that the rubber seal 891 pushes the adjusting member 88 upward, so that the fixed plates 871 distributed in an equiangular triangle move toward each other to achieve clamping of the test piece 101. In order to facilitate the control of the pressurized air pressure, the other end of the pressurized hole 812 is connected to the upper computer control box 10 through a stop valve.

[0051] Preferably, a displacement sensor is further provided at the lower end of the drill rod 6 , and the displacement sensor is connected to the host computer control box 10 for monitoring the drilling depth of the micro drill bit 91 in real time.

[0052] The method for using the rock drillability tester of the present invention includes:

[0053] Before use: Replace the drill bit 91 with the required specifications;

[0054] During use: first, according to the experimental requirements, the specimen 101 is placed on the specimen disk 83, and air is injected into the rubber seal 891 through the pressure hole 812 to apply pressure, so that the rubber seal 891 pushes the adjustment part 88 upward, so that the fixed disks 871 distributed in an equiangular triangle move toward each other to achieve the clamping of the specimen 101; then, by rotating the adjustment disk 71, the connecting plate 12 is pulled in the vertical direction through the adjustment rod 73 to adjust the relative distance between the center plate 3 and the top plate 4; finally, the hydraulic cylinder 13 and the motor are controlled to work, and the hydraulic cylinder 13 is used to provide static load pressure and the motor is used to provide drilling speed to drive the drill rod 6 to rotate, and the specimen 101 is drilled by the drill bit 91, and the drilling time and drilling depth are recorded, and then the drillability level value of the specimen 101 is determined according to the drilling time and drilling depth.

[0055] The technical parameters of the rock drillability tester of the present invention include:

[0056] (1) Power supply voltage: 220V; 50Hz; power 2KW;

[0057] (2) Stepless speed regulation: 0-100 mm / min (factory calibration 55 r / min ± 1 r / min);

[0058] (3) Specimen size: side length 100×100mm; φ25×80mm; other specifications are optional;

[0059] (4) Types of micro drill bits 91: Micro drill bit 1, consisting of 8 and 9 spacer pads threaded onto the drill bit body using a blade shaft, with a diameter of 31.75 mm after assembly; Micro drill bit 2: PDC drill bit, consisting of two PDC composite sheets symmetrically clamped onto the drill bit body, with a diameter of 32 mm after assembly;

[0060] (5) Static and dynamic load: 0~10kN can be adjusted arbitrarily (factory calibration 890N±10N) (PDC drilling pressure factory calibration 500N±20N);

[0061] (6) Drilling depth displacement: 0~20mm, accuracy 0.01mm;

[0062] (7) WOB torque rotation sensor: 0~100N·m±0.1Nm (this function is optional).

[0063] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A rock drillability tester, characterized by: It includes a control unit and an action unit, wherein the control unit is connected with the action unit to control the operation of the action unit; The action unit is a rock drilling pressure device, comprising a bottom plate (2), a middle plate (3), a top plate (4) and a connecting column (5), wherein the connecting column (5) passes through the middle plate (3) to connect the bottom plate (2) with the top plate (4), wherein the middle plate (3) is movably arranged on the connecting column (5) and connected to the top plate (4) via a height adjustment mechanism (7), and a drilling pressure test mechanism (1) is arranged on the middle plate (3), the bottom plate (2) is arranged at the lower end of the connecting column (5) and is fixedly connected to the connecting column (5), and a specimen fixing mechanism (8) is arranged on the bottom plate (2), and the specimen fixing mechanism (8) is arranged directly below the drilling pressure test mechanism (1) and is used in conjunction with the specimen (101); The specimen fixing mechanism (8) includes a specimen disk (83), a mounting seat (84), a connecting shaft (85), a curved arm (86), a pressing support (87), a fixed disk (871) and an adjusting member (88), wherein the adjusting member (88) is movably sleeved on the supporting column (89) and is used in conjunction with a positioning cylinder (811) provided on the positioning disk (81), one end of the connecting shaft (85) is connected to a positioning groove (881) provided on the adjusting member (88) through a hinge shaft, and the other end of the connecting shaft (85) is hinged to one end of the curved arm (86), the curved arm (86) is rotatably provided between two symmetrically provided mounting seats (84), and the other end of the curved arm (86) is hingedly connected to the pressing support (87), and the fixed disk (871) is provided on the pressing support (87) and is used in conjunction with the specimen (101); The adjusting member (88) is movably arranged on the upper side of the positioning cylinder (811), and a rubber sealing member (891) is embedded in the inner side of the adjusting member (88). The rubber sealing member (891) is movably connected to the support column (89) through a sealing ring (892). The lower end limit plate of the rubber sealing member (891) extends into the internal cavity of the positioning cylinder (811) and moves up and down along the internal cavity of the positioning cylinder (811). The positioning cylinder (811) is also provided with a pressurizing hole (812), and the pressurizing hole (812) is communicated with the internal cavity of the rubber sealing member (891); The drilling pressure test mechanism (1) comprises an L-shaped fixing plate (11), a connecting plate (12), a position limiting fixing member (14), a drilling pressure assembly, a hydraulic cylinder (13), a connecting member (15), a motor and a drill rod (6), and a drilling assembly (9) is provided at the lower end of the drill rod (6); The drilling assembly (9) includes a micro drill bit (91) and a drill bit mounting mechanism, wherein the micro drill bit (91) is mounted on the front end of the drill rod (6) via the drill bit mounting mechanism, and the drill bit mounting mechanism includes a collet (92), a tightening screw (95), a third bevel gear (97), and a fourth bevel gear (98); The meshing force between the fourth bevel gear (98) and the third bevel gear (97) is used to enable the tensioning screw (95) to drive the collet (92) to move along the mounting cavity (61), thereby achieving the collet (92) clamping and fixing the micro drill bit (91).

2. A rock drillability tester according to claim 1, characterized in that: The fixing plate (11) is symmetrically mounted on the middle plate (3) by means of bolts, and the connecting plate (12) is mounted between the two fixing plates (11) by means of bolts and is used in conjunction with the height adjustment mechanism (7); the limiting fixing member (14) comprises an arc-shaped limiting plate (141) and a threaded connecting rod (143), wherein the threaded connecting rod (143) is arranged on the back side of the arc-shaped limiting plate (141) and passes through an adjustment slot (111) arranged on the L-shaped fixing plate (11) and is used in conjunction with a fastening nut (144), and a supporting plate (142) is further arranged on the lower side of the arc-shaped limiting plate (141), and the supporting plate (142) is used in conjunction with a drilling pressure assembly.

3. A rock drillability tester according to claim 2, characterized in that: The hydraulic cylinder (13) is installed between two symmetrically arranged limit fixing members (14) and is controlled by the upper computer control box (10). The end of the piston rod of the hydraulic cylinder (13) is rotatably connected to the drill rod (6) through the adapter connector (15). The motor is fixedly arranged on one side of the adapter connector (15), and a first driving gear (17) is arranged at the power output end of the motor. The first driving gear (17) and the second driven gear (16) arranged at the end of the drill rod (6) are engaged with each other, and the drill rod (6) is driven to rotate by the motor. The drill rod (6) passes through the middle plate (3) through the guide sleeve (18).

4. A rock drillability tester according to claim 3, characterized in that: The transition connector (15) is symmetrically provided with a first clamping groove (151) and a second clamping groove (152), wherein the first clamping groove (151) is connected to the piston rod of the hydraulic cylinder (13) via a connecting pin, and a first bearing (153) is provided in the second clamping groove (152), and the drill rod (6) is rotatably connected to the second clamping groove (152) via the first bearing (153).

5. A rock drillability tester according to claim 3, characterized in that: The collet (92) is movably mounted in the mounting cavity (61) at the front end of the drill rod (6), and the rear end of the collet (92) is threadedly connected to the tightening screw (95). The tightening screw (95) is mounted in the internal cavity of the drill rod (6) through a third bearing (96). The third bevel gear (97) is mounted at the rear end of the tightening screw (95) and meshes with the fourth bevel gear (98). The fourth bevel gear (98) is mounted in the drill rod (6) through a connecting rod and a bearing, and a hexagonal slot (99) is provided on the fourth bevel gear (98). The hexagonal slot (99) is used in conjunction with a hexagonal insert rod (90) provided on the adjustment rod.

6. A rock drillability tester according to claim 5, characterized in that: The mounting cavity (61) is a trapezoidal mounting groove with a large opening and a small interior. The collet (92) includes a threaded connection sleeve (921) and an arc-shaped clip (93). The threaded connection sleeve (921) is used in conjunction with the tightening screw (95). The arc-shaped clip (93) is symmetrically arranged at the front end of the threaded connection sleeve (921), and a trapezoidal gap (922) is formed between the two arc-shaped clips (93). A spiral limiting protrusion (931) is also provided on the inner side of the arc-shaped clip (93), and the limiting protrusion (931) is used in conjunction with the micro drill bit (91); and a tightening nut (94) is also provided on the drill rod (6), and the tightening nut (94) is used in conjunction with the collet (92).

7. A rock drillability tester according to claim 2, characterized in that: The height adjustment mechanism (7) comprises an adjustment disk (71), an adjustment rod (73) and a rotating disk (75). The adjustment rod (73) is a threaded rod and is threadedly connected to the top plate (4). The adjustment disk (71) and the rotating disk (75) are respectively arranged at the upper and lower ends of the adjustment rod (73). An adjustment handle (72) is provided on the adjustment disk (71). The adjustment rod (73) is rotatably connected to the connecting plate (12) via a second bearing (74). The rotating disk (75) cooperates with a slot provided on the inner side of the connecting plate (12).

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