Mineral hardness detection device and coal mining machine

Abstract

The invention discloses a mineral hardness detection device and a detection method thereof, a coal mining machine and a mineral classification method, which can make a mineral sample into a detection sample, and obtain a mineral firmness coefficient by detecting the ultimate pressure of the detection sample, thereby realizing accurate and automatic detection of mineral hardness. The mineral hardness detection device comprises a moving trolley, a sample preparation assembly, a detection assembly and a control and calculation assembly. The sample preparation assembly comprises a hollow drill (19), a drilling machine driver (16), a lifting mechanism and a fixing mechanism. The detection assembly is used for extruding the detection sample to detect the pressure on the detection sample and transmitting the pressure on the detection sample to the control and calculation assembly. And the control and calculation assembly is electrically connected with the detection assembly and is used for obtaining the ultimate pressure of the detection sample according to the pressure of the detection sample, calculating the uniaxial compressive strength of the detection sample and converting the uniaxial compressive strength into a mineral firmness coefficient for display.

Description

Technical Field

[0001] The invention belongs to the technical field of mining, and in particular relates to a mineral hardness detection device and a coal mining machine. Background Art

[0002] During the coal mining process, the hardness of coal is directly related to the grading and classification of coal, the block rate and the crushing rate during loading. Therefore, during the coal mining process, it is necessary to classify the hardness of coal in the mining area at the source.

[0003] At present, the research on the detection technology and equipment of coal hardness is not in-depth, and the main methods for measuring coal hardness are as follows:

[0004] 1. Elastic rebound hardness test method. The principle is: using an impact body with a certain mass and shape to freely fall from a certain height to the surface of the coal to be tested, the impact body will rebound elastically after colliding with the coal sample. By measuring the height or speed of the impact body rebound and other parameters, the elastic rebound hardness of the coal is calculated according to the elastic rebound principle, thereby reflecting the hardness characteristics of the coal;

[0005] 2. Crushing strength test method: the principle is: put a coal sample of a certain size and mass into a specified container or equipment, apply a certain external force or impact force to break the coal sample, and then evaluate the hardness and crushing resistance of the coal by measuring the particle size distribution, mass loss or crushing strength index of the coal sample after crushing. Generally speaking, coal with higher hardness will be relatively less broken under the same external force and have greater crushing strength.

[0006] The above two methods can only measure the approximate hardness of coal with low accuracy, so a device that can accurately detect the hardness of coal is needed. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a mineral hardness detection device and a coal mining machine in view of the above-mentioned deficiencies in the prior art, which can make mineral samples into detection samples and obtain the mineral strength coefficient by detecting the limit pressure of the detection samples, thereby realizing accurate and automatic detection of mineral hardness.

[0008] In the first aspect, an embodiment of the present invention provides a mineral hardness detection device, which includes a mobile trolley, a sample preparation component, a detection component, and a control and calculation component. A plurality of rollers are arranged at the bottom of the mobile trolley, and the plurality of rollers can keep the mobile trolley stable after moving. The sample preparation component includes a hollow drill, a drill driver, a lifting mechanism, and a fixing mechanism. The hollow drill is arranged on the mobile trolley, and a drill tooth is arranged at the bottom edge of the hollow drill, which is used to drill the mineral sample into a detection sample of a preset shape and size; the drill driver is connected to the hollow drill, and is used to drive the hollow drill to rotate; the lifting mechanism is arranged on the mobile trolley, and the free end of the lifting mechanism is connected to the drill driver, and is used to drive the drill driver to lift and lower; the fixing mechanism is fixed below the hollow drill on the mobile trolley, and is used to fix the mineral sample. The detection component is arranged on the mobile trolley, and is used to squeeze the detection sample until the detection sample is compressed to rupture, detect the pressure of the detection component on the detection sample, and transmit the pressure of the detection component on the detection sample to the control and calculation component. The control and calculation component is arranged on the mobile trolley and is electrically connected to the detection component, and is used to obtain the ultimate pressure of the detection sample according to the pressure of the detection component on the detection sample, and calculate the uniaxial compressive strength of the detection sample according to the ultimate pressure of the detection sample and convert it into a mineral strength coefficient.

[0009] In some embodiments, there are multiple drill teeth, and the multiple drill teeth are evenly spaced and arranged on the bottom edge of the hollow drill.

[0010] In some embodiments, the size of the longitudinal section of each drill tooth gradually decreases in a direction from the top end of the hollow drill to the bottom end of the hollow drill.

[0011] In some embodiments, the fixing mechanism includes two retractable clamping members arranged opposite to each other. The fixed ends of the two retractable clamping members are fixed below the hollow drill on the mobile trolley; the retractable ends of the two retractable clamping members form an inner concave portion, and the two inner concave portions are arranged opposite to each other. The mineral sample is placed between the two inner concave portions, and the two inner concave portions can be stretched to clamp and fix the mineral sample.

[0012] In some embodiments, the drill driver is detachably connected to the core drill.

[0013] In some embodiments, the detection component includes a detection platform, a pressure detection head and a pressing mechanism. The detection platform is arranged on a mobile cart for carrying the detection sample. The pressure detection head is arranged directly above the detection sample and is electrically connected to the control and computing component for detecting the pressure of the pressure detection head on the detection sample and transmitting the pressure of the pressure detection head on the detection sample to the control and computing component. The pressing mechanism is arranged on the mobile cart; the pressure detection head is arranged at the bottom end of the pressing mechanism. The bottom end of the pressing mechanism can be extended and retracted up and down to drive the pressure detection head to rise or press down. When the bottom end of the pressing mechanism is extended downward, it can drive the pressure detection head to squeeze the detection sample on the detection platform, and the pressure detected by the pressure detection head is the pressure of the pressure detection head on the detection sample.

[0014] In some embodiments, a protective box is provided on the mobile cart; the sample preparation component and the detection component are both provided inside the protective box; the control and computing component is provided on the top of the protective box. A transparent protective cover is provided on the top of the protective box corresponding to the position of the control and computing component, and the transparent protective cover is provided above the control and computing component to protect the control and computing component.

[0015] In some embodiments, both sides of the outer surface of the protection box are provided with box lifting handles.

[0016] In some embodiments, the number of the rollers is four, and the four rollers are respectively arranged at the four corners of the bottom of the mobile trolley. A fixed roller telescopic rod is also arranged at the bottom of the mobile trolley. The fixed roller telescopic rod is longitudinally arranged between the front and rear two rollers, and the length of the fixed roller telescopic rod can be extended. After the length of the fixed roller telescopic rod is extended, the two ends of the fixed roller telescopic rod can respectively abut against the wheel surfaces of the two rollers to limit the rolling of the rollers, thereby keeping the mobile trolley motionless.

[0017] Therefore, the mineral hardness detection device provided by the embodiment of the present invention, by setting a sample preparation component, and making the sample preparation component include a hollow drill, a drill driver, a lifting mechanism and a fixing mechanism, can drive the drill driver to rise and fall through the lifting mechanism, after the drill driver drives the hollow drill to rotate, the mineral sample can be drilled into a detection sample of preset shape and size through the drill teeth set at the bottom edge of the hollow drill, thereby reducing the detection error caused by size and shape differences when the subsequent detection component detects the detection sample; by setting the detection component, the detection sample can be squeezed until the detection sample is compressed to rupture, and the pressure of the detection component on the detection sample is detected, and the pressure of the detection component on the detection sample is transmitted to the control and calculation component; by setting the control and calculation component, the limit pressure of the detection sample can be obtained according to the pressure of the detection component on the detection sample, and the uniaxial compressive strength of the detection sample is calculated according to the limit pressure of the detection sample and converted into a mineral firmness coefficient, the mineral firmness coefficient is a numerical value that can reflect the hardness of the mineral, so it can accurately reflect the hardness of the mineral, thereby realizing the accurate detection of the mineral hardness by the mineral hardness detection device, and automatically obtaining the hardness of the mineral. By setting up a mobile trolley and setting a plurality of rollers at the bottom of the mobile trolley, the mobile trolley can be kept stable and can be conveniently moved by the rollers. By setting the sample preparation component, the detection component and the control and calculation component on the mobile trolley, the sample preparation component, the detection component and the control and calculation component are integrated together, so that the instant detection of mineral samples can be realized and the entire mineral hardness detection device can be conveniently moved.

[0018] In a second aspect, an embodiment of the present invention further provides a coal mining machine, comprising a coal mining machine body and the mineral hardness detection device in the first aspect. The coal mining machine body is used for coal mining. The mineral hardness detection device is installed on the coal mining machine body and is used to perform hardness detection on coal samples in the coal mining working face when the coal mining machine body cuts a new coal mining working face.

[0019] The coal mining machine provided by the embodiment of the present invention has the same beneficial effects as the above-mentioned mineral hardness detection device, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 : A schematic diagram of one side of a mineral hardness detection device provided by an embodiment of the present invention;

[0021] Figure 2 : A schematic diagram of the other side of a mineral hardness detection device provided by an embodiment of the present invention;

[0022] Figure 3 : A structural diagram of a lifting mechanism provided by an embodiment of the present invention;

[0023] Figure 4: A structural diagram of a hollow drill provided by an embodiment of the present invention;

[0024] Figure 5 : A structural diagram of a fixing mechanism provided in an embodiment of the present invention.

[0025] Figure numerals: 1-control button; 2-display screen; 3-transparent protective cover; 4-pressing mechanism; 5-pressure detection head; 6-detection platform; 7-hydraulic telescopic rod; 8-box door connecting plate; 9-box door; 10-box door slot; 11-box lifting handle; 12-roller; 13-fixed roller telescopic rod; 14-roller telescopic rod fixing nut; 15-power mechanism; 16-drilling rig driver; 17-slide rail; 18-sliding bracket; 19-hollow drill; 20-drill bit connecting thread; 21-drill bit pipe; 22-drill teeth; 23-fixed curved plate; 24-telescopic rod; 25-fixing screw. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0027] Embodiment 1:

[0028] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a mineral hardness detection device, which can be used in a mineral mining process to detect the hardness of a mineral sample.

[0029] like Figure 1 and Figure 2 As shown, the mineral hardness testing device includes a mobile trolley. A plurality of rollers 12 are arranged at the bottom of the mobile trolley, and the plurality of rollers 12 can keep the mobile trolley stable after moving.

[0030] For example, multiple rollers 12 are evenly distributed at the bottom of the mobile trolley so that the mobile trolley can be evenly stressed, so that the mobile trolley remains stationary and stable when it does not need to move, thereby improving the stability of the mobile trolley. When the mobile trolley needs to be moved, the mobile trolley is pushed by external force to move. Therefore, the mineral hardness testing device can be easily moved to the target position.

[0031] like Figure 1 , Figure 2 and Figure 3As shown, the mineral hardness testing device also includes a sample preparation component, a testing component and a control and calculation component. The sample preparation component includes a hollow drill 19, a drill driver 16, a lifting mechanism and a fixing mechanism; the hollow drill 19 is arranged on a mobile trolley, and a drill tooth 22 is arranged at the bottom edge of the hollow drill 19, which is used to drill the mineral sample into a test sample of a preset shape and size; the drill driver 16 is connected to the hollow drill 19, and is used to drive the hollow drill 19 to rotate; the lifting mechanism is arranged on the mobile trolley, and the free end of the lifting mechanism is connected to the drill driver 16, and is used to drive the drill driver 16 to rise and fall; the fixing mechanism is fixed under the hollow drill 19 on the mobile trolley, and is used to fix the mineral sample. The testing component is arranged on the mobile trolley, and is used to squeeze the test sample until the test sample is compressed to break, and detect the pressure of the testing component on the test sample, and transmit the pressure of the testing component on the test sample to the control and calculation component. The control and calculation component is arranged on the mobile trolley and is electrically connected to the detection component. It is used to obtain the ultimate pressure of the detection sample according to the pressure exerted by the detection component on the detection sample, and calculate the uniaxial compressive strength of the detection sample according to the ultimate pressure of the detection sample and convert it into the mineral strength coefficient.

[0032] Illustratively, the mineral sample may be a coal sample.

[0033] For example, the shape and size of the test sample can be flexibly set according to the type and hardness of the mineral sample.

[0034] Generally, the shape of the test sample can be set to be cylindrical, so that the cylindrical mineral sample can be easily drilled by rotating the hollow drill 19.

[0035] For example, when the hardness of the mineral sample is relatively large, the size of the test sample can be set smaller, so as to reduce the drilling amount when drilling the test sample of a preset shape and size; when the hardness of the mineral sample is relatively small, the size of the test sample can be set larger.

[0036] Exemplarily, the shape and size of the hollow structure formed inside the hollow drill 19 are the same as the shape and size of the test sample.

[0037] It is understandable that the shape and size of the selected mineral sample should be appropriate, for example, the size of the mineral sample should be larger than the final test sample, so that the mineral sample can be made into a test sample after removing the excess part.

[0038] The shape and size of the test sample are preset values, so the cross-sectional area of ​​the test sample is a fixed value, which facilitates the subsequent calculation of the uniaxial compressive strength of the test sample through the ultimate pressure of the test sample.

[0039] Exemplarily, the preset shape of the test sample is a cylinder, and the aspect ratio of the cylinder is 2:1.

[0040] For example, the diameter of the cylinder is 50 mm and the height is 100 mm, and the hollow shape formed inside the hollow drill 19 is also a cylinder with a diameter of 50 mm and a height of 100 mm. Of course, the diameter and height of the cylinder can also be other sizes.

[0041] The sample preparation component can be used to make the mineral sample into a test sample of a preset shape and size, thereby reducing the detection error caused by size and shape differences when the subsequent detection component detects the test sample.

[0042] When the hollow drill 19 is working, the lifting mechanism drives the hollow drill 19 to move downward, and the drill teeth 22 can drill out a part with the same hollow shape as the inner hollow of the hollow drill 19 from the mineral sample, and the part is the test sample.

[0043] In some examples, such as Figure 3 As shown, the lifting mechanism comprises a slide rail 17, a sliding bracket 18 and a driving member. The slide rail 17 is vertically fixed on the moving trolley, and the sliding bracket 18 is slidably arranged on the slide rail 17, and the sliding bracket 18 forms the free end of the lifting mechanism.

[0044] Exemplarily, a tooth groove is provided on the slide rail 17, a driving member is provided on the sliding bracket 18, and a gear adapted to the tooth groove is provided at the driving end of the driving member. When the gear of the driving member rotates, it can drive the sliding bracket 18 to move up and down along the slide rail 17.

[0045] In other examples, the lifting mechanism may also be a screw-nut mechanism.

[0046] Exemplarily, the drill driver 16 is an electric motor.

[0047] Exemplarily, the drill driver 16 is fixed on the upper side of the sliding bracket 18 , and the driving end of the drill driver 16 passes through the sliding bracket 18 and is located below the sliding bracket 18 .

[0048] Exemplarily, the fixing mechanism is a positioning fixture, which can clamp and fix the mineral sample to prevent the position of the mineral sample from shaking when the hollow drill 19 is working, thereby preventing the shape and size of the final test sample from being affected.

[0049] Exemplarily, when the detection component squeezes the detection sample, the detected pressure can be transmitted to the control and calculation component in real time.

[0050] During the process of the detection component squeezing the detection sample, the squeezing force of the detection component on the detection sample gradually increases until the detection sample is compressed to break. The control and calculation component can obtain the limit pressure of the detection sample during the squeezing process.

[0051] Exemplarily, the rate of increase of the squeezing force of the detection component on the detection sample is generally controlled between 0.5 MPa / s and 1.0 MPa / s.

[0052] Exemplarily, the ultimate pressure of the test sample is the maximum pressure that the test sample can withstand before breaking.

[0053] Uniaxial compressive strength is an important indicator of the mechanical properties of materials. It refers to the maximum compressive stress that a specimen can withstand under uniaxial compression test (i.e., pressure is applied in only one axial direction). Simply put, the material is made into a specimen of a specified shape and size, and pressure is gradually applied axially on a testing machine until the specimen is destroyed. The ratio of the maximum pressure applied to the cross-sectional area of ​​the specimen is the uniaxial compressive strength.

[0054] The calculation process of the uniaxial compressive strength is: divide the ultimate pressure of the above-mentioned test sample by the cross-sectional area of ​​the test sample, and the obtained pressure value is the uniaxial compressive strength of the test sample.

[0055] For example, the uniaxial compressive strength can be converted into the mineral strength coefficient using the formula: f=R / 10, where f is the mineral strength coefficient, R is the uniaxial compressive strength of the test sample, and the unit of R is MPa.

[0056] For example, if the uniaxial compressive strength of the test sample is 60 MPa, the converted mineral strength coefficient is 60 / 10=6.

[0057] Therefore, the mineral firmness coefficient is a numerical value that can be compared in size and can accurately reflect the hardness of the mineral, thereby enabling the mineral hardness detection device to accurately detect the mineral hardness.

[0058] Exemplarily, the control and calculation component may include a calculation module. The calculation module may be a general-purpose microprocessor, through which the limit pressure of the test sample can be obtained according to the pressure of the test component on the test sample, and the uniaxial compressive strength of the test sample can be calculated and converted into a mineral strength coefficient.

[0059] For example, Figure 1 As shown, the control and calculation component may also include a display screen 2. The calculation module may also convert the mineral solidity coefficient into a display signal and transmit it to the display screen 2, so that the display screen 2 displays the mineral solidity coefficient, so that the staff can quickly obtain the hardness information of the mineral sample.

[0060] Through the above-mentioned settings, the sample preparation component can be used to automatically prepare the mineral sample into a test sample that meets the detection requirements of the detection component, and the pressure on the test sample is obtained by squeezing the test sample by the detection component. Finally, the control and calculation component obtains the limit pressure of the test sample based on the pressure of the test sample by the detection component, and the uniaxial compressive strength of the test sample is calculated and converted into a mineral strength coefficient. The mineral strength coefficient is a numerical value that can reflect the hardness of the mineral, and can accurately reflect the hardness of the mineral, thereby realizing accurate and automatic detection of the mineral hardness by the mineral hardness detection device.

[0061] Therefore, the mineral hardness testing device provided by the embodiment of the present invention, by setting a sample preparation component, and making the sample preparation component include a hollow drill 19, a drill driver 16, a lifting mechanism and a fixing mechanism, the drill driver 16 can be driven to rise and fall by the lifting mechanism, and after the drill driver 16 drives the hollow drill 19 to rotate, the drill teeth 22 set at the bottom edge of the hollow drill 19 can drill the mineral sample into a test sample of a preset shape and size, thereby reducing the detection error caused by the size and shape difference when the subsequent detection component detects the test sample; by setting the detection component, the test sample can be squeezed until the test sample is The test sample is compressed until it breaks, and the pressure of the test component on the test sample is detected, and the pressure of the test component on the test sample is transmitted to the control and calculation component; by setting the control and calculation component, the limit pressure of the test sample can be obtained according to the pressure of the test component on the test sample, and the uniaxial compressive strength of the test sample is calculated according to the limit pressure of the test sample and converted into the mineral firmness coefficient. The mineral firmness coefficient is a numerical value that can reflect the hardness of the mineral, so it can accurately reflect the hardness of the mineral, thereby realizing the accurate detection of the mineral hardness by the mineral hardness detection device and automatically obtaining the hardness of the mineral. By setting a mobile trolley and setting a plurality of rollers 12 at the bottom of the mobile trolley, the mobile trolley can be kept stable and the mobile trolley can be conveniently moved by the rollers 12. By setting the sample preparation component, the detection component and the control and calculation component on the mobile trolley, the sample preparation component, the detection component and the control and calculation component are integrated together, so that the instant detection of the mineral sample can be realized, and the entire mineral hardness detection device can be conveniently moved.

[0062] In some embodiments, the drill driver 16 and the core drill 19 are detachably connected.

[0063] Exemplary, combined Figure 3 and Figure 4 The driving end of the drill driver 16 is provided with a drill bit connecting thread 20, and the upper end of the hollow drill 19 is provided with a drill bit connecting pipe 21, and the drill bit connecting pipe 21 is threadedly connected to the drill bit connecting thread 20, so that the hollow drill 19 and the drill driver 16 can be detachably connected, so that the drill driver 16 can drive the hollow drill 19 to rotate.

[0064] Alternatively, the driving end of the drill driver 16 is connected to the hollow drill 19 via screws, and the drill driver 16 and the hollow drill 19 can be quickly disassembled by removing the screws.

[0065] It is understandable that the hardness of the mineral samples is different, so hollow drills 19 of different specifications or sizes are needed to drill the mineral samples into test samples of preset shapes and sizes.

[0066] For example, if the hardness of the mineral sample is relatively high, the hollow drill 19 needs to be equipped with a drill tooth 22 with a higher hardness, so as to improve the efficiency of making the test sample and reduce the wear of the mineral sample on the drill tooth 22.

[0067] Through the above arrangement, the hollow drill 19 can be easily replaced.

[0068] In some embodiments, Figure 4 As shown, there are multiple drill teeth 22 , and the multiple drill teeth 22 are evenly spaced and arranged at the bottom edge of the hollow drill 19 .

[0069] For example, the number of the drill teeth 22 at the bottom end of the hollow drill 19 may be three, five, seven, or the like.

[0070] like Figure 4 As shown, the number of the drill teeth 22 at the bottom end of the hollow drill 19 is five.

[0071] For example, when the size of the test sample to be drilled is larger, a larger number (eg, twelve, fifteen, etc.) of drill teeth 22 may be provided to increase the efficiency of drilling.

[0072] Through the above arrangement, when the drill teeth 22 are drilling the mineral sample, the force uniformity of the hollow drill 19 in the radial direction can be improved, and the drilling efficiency of the mineral sample can be improved.

[0073] In some embodiments, Figure 4 As shown, the size of the longitudinal section of each drill tooth 22 gradually decreases in the direction from the top end of the hollow drill 19 to the bottom end of the hollow drill 19 .

[0074] Exemplarily, in the direction from the top of the hollow drill 19 to the bottom of the hollow drill 19, the shape of the longitudinal section of each drill tooth 22 is a right triangle, one right-angled side of the right triangle is connected to the bottom of the hollow drill 19, the other right-angled side of the right triangle forms the inner side of the hollow drill 19, and the hypotenuse of the right triangle forms the outer side of the hollow drill 19.

[0075] That is, in a direction from the top end of the hollow drill 19 to the bottom end of the hollow drill 19 , each drill tooth 22 is gradually narrowed from the outside to the inside.

[0076] In other examples, the hypotenuse of the right triangle may be changed to an arc shape.

[0077] Through the above arrangement, a sharp blade can be formed at the bottom end of the drill tooth 22. Multiple drill teeth 22 form an annular blade at the bottom of the hollow drill 19, which can quickly realize the production of test samples while effectively reducing the degree of structural damage to the test samples.

[0078] In some embodiments, in combination Figure 2 and Figure 5 The fixing mechanism includes two retractable clamping members arranged opposite to each other. The fixed ends of the two retractable clamping members are fixed below the hollow drill 19 on the moving trolley. The retractable ends of the two retractable clamping members form an inner concave portion, and the two inner concave portions are arranged opposite to each other. The mineral sample is placed between the two inner concave portions, and the two inner concave portions can be stretched to clamp and fix the mineral sample.

[0079] It is understandable that mineral samples are irregular in shape and size.

[0080] like Figure 5 As shown, each retractable clamping member includes a fixed curved plate 23 , a retractable rod 24 and a fixing screw 25 .

[0081] Exemplarily, the telescopic rod 24 is formed by sleeve-jointing a plurality of pipe sections, so the telescopic rod 24 can be telescopic.

[0082] Exemplarily, the outermost pipe of the telescopic rod 24 is fixed below the hollow drill 19 on the mobile trolley to form the fixed end of the telescopic clamp. The innermost pipe of the telescopic rod 24 is connected to the fixed curved plate 23 to form the telescopic end of the telescopic clamp.

[0083] Exemplarily, the fixed curved plate 23 is C-shaped, forming an inner concave portion of the telescopic end of the telescopic clamp.

[0084] like Figure 5 As shown, the two fixed curved plates 23 arranged opposite to each other can fix the mineral sample well.

[0085] Exemplarily, the fixing screws 25 are used to fix the multiple tube sections in the telescopic rod 24 .

[0086] Exemplarily, there may be a plurality of fixing screws 25 .

[0087] Exemplarily, the fixing screw 25 passes through an outer pipe section and abuts against the inner pipe section, thereby achieving the positioning of each pipe section after extension or contraction, and fixing the mineral sample through the two fixed curved plates 23.

[0088] Exemplarily, each fixed curved plate 23 may be connected to two telescopic rods 24 , so that the fixed curved plate 23 is supported by the two telescopic rods 24 , thereby increasing the fixing strength of the fixed curved plate 23 to the mineral sample.

[0089] Through the above arrangement, the distance between the two retractable clamping members can be flexibly adjusted to fix mineral samples of different shapes and sizes.

[0090] In some embodiments, Figure 1 and Figure 2 As shown, a protective box is provided on the mobile trolley. The sample preparation component and the detection component are both provided inside the protective box; the control and computing component is provided on the top of the protective box. A transparent protective cover 3 is provided at the position of the control and computing component on the top of the protective box, and the transparent protective cover 3 is provided above the control and computing component to protect the control and computing component.

[0091] Exemplarily, the material of the protective box is metal to protect the sample preparation components and detection components in the protective box.

[0092] Exemplarily, both ends of the protection box are provided with a box door connecting plate 8, a box door 9, and a box door slot 10. The box door connecting plate 8 connects the box body of the protection box and the box door 9 to form a hinge; the box door 9 is provided with a buckle, and the buckle of the box door 9 and the box door slot 10 can be locked to facilitate opening or closing the box door 9.

[0093] When the sample preparation component starts working, in order to prevent the mineral fragments of the mineral sample from splashing, the box door 9 needs to be closed, and after the preparation of the test sample is completed, the box door 9 is opened to take out the test sample.

[0094] Exemplarily, the transparent protective cover 3 is hinged on the upper side wall of the protective box.

[0095] Through the above arrangement, the sample preparation component and the detection component can be protected by the protective box, and the control and calculation components can be protected by the transparent protective cover 3.

[0096] In some embodiments, Figure 1 and Figure 2 As shown, box lifting handles 11 are provided on both sides of the outer surface of the protection box.

[0097] The protection box can be lifted by the box lifting handle 11 or fixed from the top with a rope to ensure that the entire mineral hardness testing device is movable, thereby improving the portability of the mineral hardness testing device.

[0098] In some examples, such as Figure 1 As shown, the control and calculation component also includes a control button 1, which is electrically connected to the sample preparation component and the detection component respectively, and the control button 1 is used to control the start and stop of the sample preparation component and the detection component.

[0099] For example, Figure 1 As shown, the transparent protective cover 3 is covered on the display screen 2 , but does not cover the control button 1 .

[0100] In some examples, such as Figure 1 As shown, the mineral hardness testing device further includes a power mechanism 15, which is disposed in the middle of the protection box and is electrically connected to the sample preparation component and the testing component, respectively, for providing power to the sample preparation component and the testing component.

[0101] Exemplarily, the power mechanism 15 may be an electric control box or a power distribution unit.

[0102] In some embodiments, Figure 1 As shown, the detection component includes a detection platform 6, a pressure detection head 5 and a pressing mechanism 4. The detection platform 6 is arranged on a mobile trolley for carrying a detection sample. The pressure detection head 5 is arranged directly above the detection sample and is electrically connected to the control and computing component for detecting the pressure of the pressure detection head 5 on the detection sample and transmitting the pressure of the pressure detection head 5 on the detection sample to the control and computing component. The pressing mechanism 4 is arranged on the mobile trolley, and the pressure detection head 5 is arranged at the bottom end of the pressing mechanism; the bottom end of the pressing mechanism 4 can be extended and retracted up and down to drive the pressure detection head 5 to rise or press down. When the bottom end of the pressing mechanism 4 is extended downward, it can drive the pressure detection head 5 to squeeze the detection sample on the detection platform 6, and the pressure detected by the pressure detection head 5 is the pressure of the pressure detection head 5 on the detection sample.

[0103] Exemplarily, the pressure detection head 5 may be a pressure detection sensor, which is used to convert the received pressure into an electrical signal containing pressure information, and transmit the electrical signal containing the pressure information to the control and computing components.

[0104] Exemplarily, the pressing mechanism 4 can be a hydraulic press, which is fixed at the top of the protection box, and the hydraulic telescopic rod 7 of the hydraulic press can be extended downward. The pressure detection head 5 is arranged at the bottom end of the hydraulic telescopic rod 7.

[0105] When the hydraulic telescopic rod 7 of the hydraulic press is extended downward, it drives the pressure detection head 5 to move downward, and squeezes the detection sample after contacting the detection sample on the detection platform 6. After the hydraulic telescopic rod 7 of the hydraulic press continues to be extended downward, the pressure applied to the detection sample increases until the detection sample is compressed to rupture. During this process, the pressure detection head 5 continues to detect the pressure of the pressure detection head 5 on the detection sample.

[0106] Through the above arrangement, it is possible to detect the pressure of the test sample from the beginning of compression to the compression to rupture.

[0107] In some embodiments, in combination Figure 1 and Figure 2 There are four rollers 12, and the four rollers 12 are respectively arranged at the four corners of the bottom of the mobile trolley. A fixed roller telescopic rod 13 is also arranged at the bottom of the mobile trolley. The fixed roller telescopic rod 13 is longitudinally arranged between the front and rear rollers 12, and the length of the fixed roller telescopic rod 13 can be extended. After the length of the fixed roller telescopic rod 13 is extended, the two ends of the fixed roller telescopic rod 13 can respectively abut against the wheel surfaces of the two rollers 12 to limit the rolling of the rollers 12, thereby keeping the mobile trolley motionless.

[0108] The four rollers 12 arranged at the four corners of the bottom of the mobile trolley can facilitate the center of gravity of the mineral hardness detection device to be located between the four rollers 12, thereby improving the stability of the mobile trolley when it is stationary.

[0109] Exemplarily, the number of the fixed roller telescopic rods 13 is two, and each fixed roller telescopic rod 13 is longitudinally arranged between the two front and rear rollers 12 .

[0110] Exemplarily, the fixed roller telescopic rod 13 includes a sleeve, a telescopic rod and a roller telescopic rod fixing nut 14. The telescopic rod can move freely in the sleeve, and when the roller telescopic rod fixing nut 14 is tightened, the relative position of the sleeve and the telescopic rod can be fixed, and when the roller telescopic rod fixing nut 14 is loosened, the relative position of the sleeve and the telescopic rod can be adjusted to adjust the total length of the fixed roller telescopic rod 13.

[0111] When the mobile trolley needs to remain stationary, the length of the telescopic rod extending out of the sleeve is increased, that is, the total length of the fixed roller telescopic rod 13 is increased, so that the total length of the fixed roller telescopic rod 13 is sufficient to make the two ends of the fixed roller telescopic rod 13 respectively abut against the wheel surfaces of the two rollers 12 to restrict the rolling of the rollers 12, thereby keeping the mobile trolley stationary, and then tighten the roller telescopic rod fixing nut 14 to fix the relative position of the sleeve and the telescopic rod, keeping the fixed roller telescopic rod 13 in a state of restricting the rolling of the rollers 12.

[0112] When the trolley needs to be moved, the roller telescopic rod fixing nut 14 is loosened to reduce the length of the telescopic rod extending out of the sleeve, that is, the total length of the fixed roller telescopic rod 13 is reduced. The two ends of the fixed roller telescopic rod 13 no longer abut against the wheel surfaces of the two rollers 12, so that the rollers 12 can rotate freely, thereby facilitating the movement of the trolley through the rollers 12.

[0113] Through the above arrangement, the stationary state or movable state of the mobile trolley can be switched by fixing the roller telescopic rod 13 .

[0114] The beneficial effects of the mineral hardness detection device provided by the embodiment of the present invention are as follows: the mineral hardness detection device integrates the sample preparation component, the detection component and the control and calculation component. The sample preparation component is responsible for preparing the detection sample with uniform shape and size, thereby reducing the mineral hardness detection error caused by the difference in mineral size and shape; the detection component, the control and calculation component measure the uniaxial compressive strength of the detection sample by squeezing it, and convert it into the mineral firmness coefficient for display, so that the mineral hardness detection device has mobility and portability, and the detection process is integrated and rapid, aiming to realize the instant detection of mineral hardness on site. Furthermore, by quickly obtaining the mineral hardness information of each coal mining area in the mining field, the minerals can be effectively classified, thereby improving the grading efficiency and block rate of the minerals.

[0115] Embodiment 2:

[0116] The embodiment of the present invention further provides a coal mining machine for quickly detecting the hardness of minerals in a coal mining face during coal mining, and the coal mining machine includes a coal mining machine body and the mineral hardness detection device in Embodiment 1. The mineral hardness detection device is installed on the coal mining machine body and is used to perform hardness detection on coal samples in the coal mining face when the coal mining machine body cuts out a new coal mining face.

[0117] Through the above-mentioned arrangement, when it is necessary to test the hardness of the coal in the coal mining face, the mineral hardness testing device can be used to quickly make the coal in the coal mining face into a test sample, and after testing the pressure of the testing component on the test sample, the mineral strength coefficient that can reflect the numerical value of the hardness of the coal is obtained through calculation, so that the staff can realize accurate and automatic detection of the hardness of the coal at the coal mining face, which is convenient for the subsequent classification of the coal hardness. The hardness of the coal in the mining field can be effectively and quickly classified, providing guidance for production and promoting the graded utilization of coal.

[0118] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A mineral hardness testing device, characterized in that: include: A mobile trolley, wherein a plurality of rollers (12) are arranged at the bottom of the mobile trolley, and the plurality of rollers (12) can enable the mobile trolley to remain stable after moving; A sample preparation component comprises a hollow drill (19), a drill driver (16), a lifting mechanism and a fixing mechanism; the hollow drill (19) is arranged on the mobile trolley, and the bottom edge of the hollow drill (19) is provided with a drill tooth (22) for drilling a mineral sample into a test sample of a preset shape and size; the drill driver (16) is connected to the hollow drill (19) and is used to drive the hollow drill (19) to rotate; the lifting mechanism is arranged on the mobile trolley, and the free end of the lifting mechanism is connected to the drill driver (16) and is used to drive the drill driver (16) to rise and fall; the fixing mechanism is fixed below the hollow drill (19) on the mobile trolley and is used to fix the mineral sample; A detection component is arranged on the mobile vehicle, and is used to squeeze the detection sample until the detection sample is compressed to rupture, detect the pressure of the detection component on the detection sample, and transmit the pressure of the detection component on the detection sample to the control and calculation component; and, A control and calculation component is arranged on the mobile vehicle and is electrically connected to the detection component. It is used to obtain the ultimate pressure of the detection sample according to the pressure of the detection component on the detection sample, and calculate the uniaxial compressive strength of the detection sample according to the ultimate pressure of the detection sample and convert it into a mineral strength coefficient.

2. The mineral hardness detection device according to claim 1, characterized in that: The number of the drill teeth (22) is multiple, and the multiple drill teeth (22) are evenly spaced and arranged on the bottom edge of the hollow drill (19).

3. The mineral hardness detection device according to claim 2, characterized in that: In a direction from the top end of the hollow drill (19) to the bottom end of the hollow drill (19), the size of the longitudinal section of each drill tooth (22) gradually decreases.

4. The mineral hardness detection device according to claim 1, characterized in that: The fixing mechanism comprises two retractable clamping members arranged opposite to each other; The fixed ends of the two retractable clamping members are both fixed below the hollow drill (19) on the moving trolley; the retractable ends of the two retractable clamping members both form an inner concave portion, and the two inner concave portions are arranged opposite to each other; The mineral sample is placed between the two inner recesses, and the two inner recesses are able to clamp and fix the mineral sample after being extended.

5. The mineral hardness detection device according to claim 1, characterized in that: The drill driver (16) and the core drill (19) are detachably connected.

6. The mineral hardness detection device according to claim 1, characterized in that: The detection component comprises: A testing platform (6), arranged on a mobile vehicle, for carrying the testing sample; A pressure detection head (5) is arranged directly above the detection sample and is electrically connected to the control and computing component, and is used to detect the pressure of the pressure detection head (5) on the detection sample and transmit the pressure of the pressure detection head (5) on the detection sample to the control and computing component; A pressing mechanism (4) is arranged on the mobile trolley; the pressure detection head (5) is arranged at the bottom end of the pressing mechanism (4); the bottom end of the pressing mechanism (4) can be extended and retracted up and down to drive the pressure detection head (5) to rise or press down; When the bottom end of the pressing mechanism (4) extends downward, it can drive the pressure detection head (5) to press the detection sample on the detection platform (6), and the pressure detected by the pressure detection head (5) is the pressure of the pressure detection head (5) on the detection sample.

7. The mineral hardness detection device according to any one of claims 1 to 6, characterized in that: The mobile trolley is provided with a protection box; the sample preparation component and the detection component are both arranged inside the protection box; the control and calculation component is arranged on the top of the protection box; A transparent protective cover (3) is arranged on the top of the protective box at a position corresponding to the control and computing component. The transparent protective cover (3) is arranged above the control and computing component to protect the control and computing component.

8. The mineral hardness detection device according to claim 7, characterized in that: Box lifting handles (11) are provided on both outer surfaces of the protection box.

9. The mineral hardness detection device according to any one of claims 1 to 6, characterized in that: The number of the rollers (12) is four, and the four rollers (12) are respectively arranged at the four corners of the bottom of the mobile trolley; A fixed roller telescopic rod (13) is also provided at the bottom of the mobile trolley; The fixed roller telescopic rod (13) is longitudinally arranged between the front and rear rollers (12), and the length of the fixed roller telescopic rod (13) can be extended; After the length of the fixed roller telescopic rod (13) is extended, the two ends of the fixed roller telescopic rod (13) can respectively abut against the wheel surfaces of the two rollers (12) to limit the rolling of the rollers (12), thereby keeping the moving trolley stationary.

10. A coal mining machine, characterized in that: include: The coal mining machine body is used for coal mining; and, The mineral hardness detection device described in any one of claims 1 to 9 is installed on the coal mining machine body and is used to perform hardness detection on coal samples in the coal mining working face when the coal mining machine body cuts out a new coal mining working face.

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