Coke sample preparation method and sample preparation system

Abstract

The invention relates to the field of coke sample preparation, in particular to a coke sample preparation method and a sample preparation system. According to the coke sample preparation method and the sample preparation system provided by the invention, the coke sample preparation can be automatically completed, the applicability is high, and the quantity can be adjusted according to actual conditions and needs so as to meet different sampling standards.

Description

Technical Field

[0001] The present invention relates to the field of coke sample preparation, and more specifically, to a coke sample preparation method and a sample preparation system. Background Art

[0002] Coke is mainly used for ironmaking. Accurate analysis of its particle size, M40, and M10 is of great significance for guiding blast furnace production, and coke sampling and analysis are required. Manual sampling requires manual screening, drum and discarding, and manual crushing and pulverization. This is not only labor-intensive, but also noisy and easy to inhale dust, affecting the health of operators. When using the existing coke sampling system for sampling, due to the hard texture of coke, rough surface, irregular shape, conductive dust, and many types of samples, the existing coke sampling system has problems such as complex system, fast wear, easy blockage of channels, "bridging", stuck sieve holes, and high electrical failure. Summary of the invention

[0003] The purpose of the present invention is to provide a coke sampling method and a sampling system, which can automatically complete the coke sampling and have strong applicability. The size of the sample can be adjusted according to actual conditions and needs to meet different sampling standards.

[0004] In order to achieve these purposes and other advantages according to the present invention, a coke sampling method is provided, comprising the following steps:

[0005] S1. Performing a first-level quantitative reduction on the coke sample to obtain a first process sample, a moisture sample and a first waste sample;

[0006] S2, reducing the moisture sample obtained in S1 to obtain a moisture sample and a moisture sample storage sample;

[0007] S3, pre-drying the first process sample obtained in S1 and then crushing it for the first time, and then performing the first secondary quantitative reduction after crushing to obtain a second process sample and a second waste sample;

[0008] S4, crushing the second process sample obtained in S3 for a second time, and performing a second secondary quantitative reduction after crushing to obtain a third process sample and a third waste sample;

[0009] S5, performing a third secondary quantitative reduction on the third process sample obtained in S4 to obtain a grinder washing sample, a grinding sample, and a test sample storage sample;

[0010] S6. Grind the ground sample obtained in S5 to obtain a test sample. Before grinding, use the grinder obtained in S5 to wash the grinding equipment.

[0011] Furthermore, in the coke sampling method, the particle size of the coke sample in S1 is less than 13 mm.

[0012] Furthermore, in the coke sampling method, the first crushing in S3 adopts a roller crusher, and the particle size of the first process sample after the first crushing is less than 6 mm.

[0013] Furthermore, in the coke sampling method, the second crushing in S4 uses a double-roll crusher, and the particle size of the first process sample after the second crushing is less than 1 mm.

[0014] Furthermore, in the coke sampling method, the particle size of the test sample obtained after grinding in S6 is less than 0.2 mm.

[0015] The present invention also provides a coke sampling system, which adopts the above-mentioned coke sampling method, including a grabbing mechanism, and a primary quantitative shrinking machine, a secondary quantitative shrinking machine, a moisture sample shrinking machine, a grinder, a first crusher, a second crusher, a drying box and a raw material buffer rack packaging machine arranged around the grabbing mechanism.

[0016] Furthermore, the coke sampling system also includes a sample feeding conveyor and a waste sample conveyor. The discharge end of the sample feeding conveyor extends above the raw material buffer rack. The grabbing mechanism can drive the material tray to move to the feed end of the waste sample conveyor to transport the first waste sample in S1, the second waste sample in S3 and the washed grinder sample in S6 to an external recycling and processing device through the waste sample conveyor.

[0017] Furthermore, the coke sampling system also includes a cleaning device, which is arranged above the waste sample conveyor, and the grabbing mechanism drives the first-level quantitative shrinking machine, the second-level quantitative shrinking machine, the moisture sample shrinking machine, the grinder, the first crusher, the second crusher, the drying box and the material tray on the raw material buffer rack to move to the cleaning device for cleaning.

[0018] Furthermore, in the coke sampling system, the cleaning device includes a cleaning box, a reduction motor, a roller and a brush; the cleaning box is arranged above the waste sample conveyor, a discharge port is arranged at its lower end, and a feed port is arranged on its side wall; the roller is arranged in the cleaning box and is transmission-connected to the reduction motor arranged on the cleaning box; the roller is provided with an air inlet and a plurality of evenly distributed air outlets; and the brush is arranged on the roller.

[0019] Furthermore, the coke sampling system also includes a packaging machine, and the grabbing mechanism can drive the material tray to move to the feeding end of the packaging machine, so that the moisture sample and moisture sample storage sample in S2, the test sample storage sample in S5, and the test sample in S6 are all packaged by the packaging machine.

[0020] The beneficial effects of the present invention are:

[0021] 1. In the coke sample preparation method of the present invention, the coke sample is first subjected to primary quantitative reduction, and then the obtained moisture sample is subjected to moisture sample reduction to obtain a moisture sample; the obtained first process sample is dried and then crushed twice, and each crushing is followed by secondary quantitative reduction to finally obtain a test sample, and the obtained moisture sample and test sample have high precision.

[0022] 2. The coke sampling system of the present invention can automatically complete the coke sampling and has strong applicability. The size of the sample can be adjusted according to actual conditions and needs to meet different sampling standards.

[0023] 3. In the coke sample preparation system of the present invention, the cleaning device is used to clean the material tray after each use, thereby realizing automatic cleaning of the material tray without affecting its next use.

[0024] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a flow chart of the coke sample preparation method of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the coke sample preparation system of the present invention;

[0027] Figure 3 This is a schematic structural diagram of the raw material cache rack of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the cleaning device of the present invention;

[0029] Figure 5 for Figure 4 Sectional view at AA in the middle;

[0030] Figure 6 It is a structural schematic diagram of the grabbing mechanism of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the clamp of the present invention;

[0032] Figure 8 It is a structural schematic diagram of the material tray of the present invention;

[0033] Fig. 9 It is a structural schematic diagram of the first-level quantitative shrinking machine of the present invention;

[0034] Fig.10This is a schematic diagram of the structure of the first-stage quantitative shrinking machine of the present invention after removing the outer shell;

[0035] Fig.11 It is a schematic diagram of the connection between the material drop bin and the conveying mechanism of the present invention;

[0036] Fig.12 It is a connection diagram of the conveying mechanism, the lower hopper and the collecting mechanism of the present invention;

[0037] Fig.13 It is a structural schematic diagram of the lower hopper of the present invention;

[0038] Fig.14 It is a schematic diagram of the structure of the collecting mechanism described in the present invention.

[0039] Wherein, the reference numerals represent:

[0040] Grasping mechanism 1; mounting seat 1-1; clamping claw 1-2; self-centering vise 1-3; proximity switch 1-4; manipulator 1-5; material tray 1-6; linear guide rail 1-7; slide block 1-8; primary quantitative reduction machine 2; material drop bin 2-1; belt conveyor 2-2; material guide plate 2-3; adjustment plate 2-4; adjustment unit 2-5; bucket 2-6; material guide trough 2-7; material discharge pipe 2-8; guide cylinder 2-9; material baffle plate 2-10; drive unit 2-11; telescopic cylinder 2-12; collection mechanism 2-13; secondary quantitative reduction machine 3; moisture sample reduction Machine 4; grinder 5; first crusher 6; second crusher 7; drying box 8; raw material buffer rack 9; box body 9-1; first lifting plate 9-2; second lifting plate 9-3; lifting unit 9-4; dumping bin 9-5; dust suction mechanism 9-6; storage plate 9-7; packaging machine 10; sample feeding conveyor 11; waste sample conveyor 12; cleaning device 13; cleaning box 13-1; feed port 13-2; reduction motor 13-3; first cylinder 13-4; second cylinder 13-5; brush 13-6; air inlet 13-7; air outlet 13-8. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with embodiments so that those skilled in the art can implement the invention with reference to the description.

[0042] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] like Figure 1 As shown, an embodiment of the present invention provides a coke sample preparation method, comprising the following steps:

[0044] S1. Performing a first-level quantitative reduction on the coke sample to obtain a first process sample, a moisture sample and a first waste sample;

[0045] S2, reducing the moisture sample obtained in S1 to obtain a moisture sample and a moisture sample storage sample;

[0046] S3, pre-drying the first process sample obtained in S1 and then crushing it for the first time, and then performing the first secondary quantitative reduction after crushing to obtain a second process sample and a second waste sample;

[0047] S4, crushing the second process sample obtained in S3 for a second time, and performing a second secondary quantitative reduction after crushing to obtain a third process sample and a third waste sample;

[0048] S5, performing a third secondary quantitative reduction on the third process sample obtained in S4 to obtain a grinder washing sample, a grinding sample, and a test sample storage sample;

[0049] S6. Grind the ground sample obtained in S5 to obtain a test sample. Before grinding, use the grinder obtained in S5 to wash the grinding equipment.

[0050] Among them, the particle size of the coke sample in S1 is less than 13 mm.

[0051] Among them, the first crushing in S3 adopts a roller crusher, and the particle size of the first process sample after the first crushing is less than 6mm.

[0052] Among them, the second crushing in S4 adopts a double-roll crusher, and the particle size of the first process sample after the second crushing is less than 1mm.

[0053] Among them, the particle size of the test sample obtained after grinding in S6 is less than 0.2 mm.

[0054] In this embodiment, the coke sample is first subjected to a primary quantitative reduction, and then the obtained moisture sample is subjected to a moisture sample reduction to obtain a moisture sample; the obtained first process sample is dried and then crushed twice, the first crushing using a jaw crusher and the second crushing using a double-roll crusher, and each crushing is followed by a secondary quantitative reduction to finally obtain a test sample, and the obtained moisture sample and test sample have high accuracy.

[0055] The embodiment of the present invention also provides a coke sample preparation system, using the above coke sample preparation method, such as Figure 2 The device shown includes a gripping mechanism 1, and a primary quantitative reduction machine 2, a secondary quantitative reduction machine 3, a moisture sample reduction machine 4, a grinder 5, a first crusher 6, a second crusher 7, a drying box 8, a raw material buffer rack 9 and a packaging machine 10 arranged around the gripping mechanism 1. It also includes a cleaning device, which is arranged above the waste sample conveyor; it also includes a sample feeding conveyor 11 and a waste sample conveyor 12, the discharge end of the sample feeding conveyor 11 extends above the raw material buffer rack 9, and the gripping mechanism 1 can drive the material tray to move to the feed end of the waste sample conveyor 12.

[0056] In this embodiment, the material tray is clamped by the gripping mechanism 1, and the material trays 1-6 are driven to move between the primary quantitative reduction machine 2, the secondary quantitative reduction machine 3, the moisture sample reduction machine 4, the grinder 5, the first crusher 6, the second crusher 7, the drying box 8, the raw material buffer rack 9, the packaging machine 10 and the cleaning device, so as to realize the movement of materials between the above-mentioned equipment. Specifically, when the coke sample preparation system is working:

[0057] S1, select 10kg±500g of coke sample with a particle size less than 13mm, send the coke sample to the raw material buffer rack 9 through the sample feeding conveyor 11, and then move the coke sample to the primary quantitative reduction machine 2 through the grabbing mechanism 1, and perform primary quantitative reduction through the primary quantitative reduction machine 2 to obtain 4kg of the first process sample and 1kg of the moisture sample, and the rest is the first waste sample;

[0058] S2, the grabbing mechanism 1 moves the moisture sample obtained in S1 to the moisture sample reduction machine 4, and the moisture sample reduction machine 4 reduces the moisture sample to obtain two 500g samples, which are used as the moisture sample and the moisture sample storage sample respectively;

[0059] The moisture sample is then dried for 1 hour at 170°C-180°C under blast conditions. The moisture content is automatically calculated after the dryness test.

[0060] S3, the grabbing mechanism 1 moves the first process sample obtained in S1 to the drying box 8 for pre-drying, and then moves the pre-dried first process sample to the first crusher 6 through the grabbing mechanism 1 for the first crushing, the particle size of the crushed first process sample is less than 6mm, and moves it to the secondary quantitative reduction machine 3 through the grabbing mechanism 1 for the first secondary quantitative reduction, and obtains 2kg of the second process sample with a particle size less than 6mm, and the rest is the second waste sample;

[0061] S4, the grabbing mechanism 1 moves the second process sample obtained in S3 to the second crusher 7 for a second crushing, and the particle size of the second process sample after crushing is less than 1 mm. After crushing, a second secondary quantitative reduction is performed to obtain 1 kg of a third process sample with a particle size less than 1 mm and a third waste sample;

[0062] S5, the grabbing mechanism 1 moves the third process sample obtained in S4 to the secondary quantitative reduction machine 3 for the third secondary quantitative reduction, and obtains 250g of grinder washing sample, 250g of grinding sample and 500g of test sample storage sample;

[0063] S6, the grabbing mechanism 1 moves the grinder washed sample obtained in S5 to the grinder 5 for grinding to obtain a grinder washed sample waste sample, and then the grabbing mechanism 1 moves the ground sample obtained in S5 to the grinder 5 for grinding to obtain a test sample with a particle size less than 0.2 mm.

[0064] Among them, the first waste sample obtained in S1, the second waste sample obtained in S3, the third waste sample obtained in S4 and the grinder washing waste sample obtained in S6 are all moved to the waste collection bucket on the raw material buffer rack 9 by the grabbing mechanism 1, and finally the grabbing mechanism 1 moves the waste collection bucket to the cleaning device for cleaning.

[0065] The moisture sample storage sample obtained in S2, the test sample storage sample obtained in S5 and the test sample obtained in S6 are all moved to the packaging machine through the gripping mechanism 1 for packaging and coding.

[0066] Preferably, as another embodiment of the present invention, Figure 3 As shown, the raw material cache rack 9 includes a box body 9-1, a first lifting plate 9-2 and a second lifting plate 9-3. The box body 9-1 is open on one side and has multiple storage layers inside. A waste sample inlet and a sample inlet are provided at the upper end of the box body. The first lifting plate 9-2 and the second lifting plate 9-3 are respectively located below the waste sample inlet and the sample inlet, and are connected to the box body through a lifting unit 9-4. A dumping bin 9-5 is connected to the waste sample inlet. A dust collecting mechanism 9-6 is provided on the inner wall of the dumping bin. A dumping position is formed below the first lifting plate 9-2. The sample inlet is located below the discharge end of the sample feeding conveyor 11.

[0067] The gripping mechanism 1 pours the first process sample into the material tray of the drying box 8 at the pouring position.

[0068] In this embodiment, a material tray 1-6 is placed on the upper end of the first lifting plate 9-2 and the second lifting plate 9-3, and two lifting units 9-4 drive the two lifting plates 9-2 to move up and down respectively, so as to realize the up and down movement of the material tray 1-6 on the first lifting plate 9-2 and the second lifting plate 9-3. When the sample feeding conveyor 11 feeds the raw material buffer rack 9, the material tray 1-6 below the sample feeding inlet moves upward under the drive of its corresponding lifting unit 9-4, passes through the sample feeding inlet and approaches the discharge end of the sample feeding conveyor 11, and reduces the distance between the material tray 1-6 and the discharge end of the sample feeding conveyor 11, so as to ensure that the materials conveyed from the sample feeding conveyor 11 can fall into the material tray 1-6, and avoid the materials from bouncing up when falling and not falling into the material tray 1-6; after completing the material connection, the lifting unit 9-4 drives the material tray 1-6 to move downward into the box body 9-1. When collecting waste samples, a special waste tray 1-6 can be pre-set in the box body 9-1 to reduce the number of times the grabbing mechanism 1 pours the waste samples onto the waste sample conveyor 12. The waste tray 1-6 is placed on the first lifting plate 9-2 below the waste sample inlet. When pouring, the corresponding lifting unit 9-4 drives the waste tray 1-6 upward through the waste sample inlet to move into the pouring bin 9-5. The grabbing mechanism grabs the tray 1-6 containing the waste samples and pours them into the pouring bin 9-5. The waste samples are uniformly poured into the waste tray 1-6. Dust may be generated during the pouring process. At this time, the dust can be sucked away by the dust suction mechanism 9-6 on the inner wall of the pouring bin 9-5.

[0069] Preferably, as another embodiment of the present invention, it further comprises a cleaning device 13, wherein the cleaning device 13 is arranged above the waste sample conveyor 12, and the gripping mechanism 1 drives the used material tray into the cleaning device 13 for cleaning.

[0070] In this embodiment, specifically, Figure 4 As shown, the cleaning device 13 includes a cleaning box 13-1, a reduction motor 13-3, a roller and a brush 13-6. The cleaning box 13-1 is arranged above the waste sample conveyor, and a discharge port is arranged at its lower end, and a feed port 13-2 is arranged on its side wall. The roller is arranged in the cleaning box 13-1 and is transmission-connected with the reduction motor 13-3 arranged on the cleaning box 13-1. The roller is provided with an air inlet 13-7 and a plurality of air outlets 13-8 evenly distributed. The brush 13-6 is arranged on the roller.

[0071] like Figure 5As shown, the drum includes a first cylinder 13-4 and a second cylinder 13-5, one end of the first cylinder 13-4 is connected to the cleaning box 13-1, and the other end extends into the second cylinder 13-5 and is rotatably sealed therewith, the second cylinder 13-5 is closed at one end away from the first cylinder 13-4, and a plurality of air outlets 13-8 are evenly distributed thereon; an annular groove is provided on the inner wall of the first cylinder 13-4 near the second cylinder 13-5, and the annular groove is connected to the interior of the second cylinder 13-5, an air inlet 13-7 is provided on the first cylinder 13-4, and the air inlet 13-7 is connected to an external air source, and the gas delivered by the external air source enters the second cylinder 13-5 through the annular groove, and enters the cleaning box 13-1 through the plurality of air outlets 13-8 on the second cylinder 13-5, so that the drum can exhaust air to the outside. The output shaft of the reduction motor 13-3 passes through the first sleeve and is connected to the second sleeve. The grabbing mechanism passes the material tray through the feed port 13-2 into the cleaning box 13-1. When the reduction motor 13-3 is working, it drives the second sleeve to rotate, and the brush 13-6 rotates therewith. The residue on the material tray is brushed off by the brush 13-6. At the same time, multiple air outlets 13-8 on the drum blow air outward to clean the material tray. The cleaned material passes through the discharge port at the lower end of the cleaning box 13-1 and falls onto the waste sample conveyor.

[0072] Preferably, as another embodiment of the present invention, Figure 6-Figure 8 As shown, the grasping mechanism 1 includes a manipulator 1-5 and a clamp, and the clamp is connected to the claw of the manipulator 1-5. The clamp includes a mounting seat 1-1, a self-centering vise 1-3, two clamping jaws 1-2 and a proximity switch 1-4. The self-centering vise 1-3 is arranged on the mounting seat 1-1, and the two clamping jaws 1-2 are arranged opposite to each other and are connected to the self-centering vise 1-3. The proximity switch 1-4 is arranged between the two clamping jaws 1-2. Two linear guide rails 1-7 arranged along the moving direction of the clamping jaws 1-2 are parallelly arranged on the mounting seat 1-1, and two sliders 1-8 are slidably arranged on the linear guide rails 1-7, and the two sliders 1-8 are respectively connected to the two clamping jaws 1-2.

[0073] In this embodiment, the grasping mechanism 1 includes a manipulator 1-5 and a clamp. When the material tray 1-6 is clamped by the clamp, the two relatively arranged jaws 1-2 are driven to move closer to or farther from each other through the self-centering vise 1-3. A clamping position is formed between the two jaws 1-2. The material tray 1-6 containing the coke sample is clamped through the clamping position to achieve the action of clamping the material tray 1-6 or putting down the material tray 1-6. At the same time, a proximity switch 1-4 is set between the two jaws 1-2, and the opening and closing state of the clamp is detected by the proximity switch 1-4. When the proximity switch 1-4 detects a signal, the two jaws 1-2 move closer to each other until the distance between them is the minimum value, and the jaws 1-2 are in a closed state; when the proximity switch 1-4 does not detect a signal, the distance between the two jaws 1-2 is greater than the minimum value, and the jaws 1-2 are in an open state.

[0074] A cross-shaped clamping portion can be provided on one side where the clamping jaws 1-2 are close to each other. By providing a cross-shaped clamping portion on one side where the clamping jaws 1-2 are close to each other, the area of ​​the clamping portion is reduced, and the pressure when the contact surface contacts the material tray 1-6 is increased. Figure 6 As described, a clamping piece is arranged on the material tray 1-6, and two clamping jaws 1-2 clamp the clamping piece. Cross-shaped grooves matching the clamping parts of the two clamping jaws 1-2 are arranged at both ends of the clamping piece, and the clamping parts are stuck in the cross-shaped grooves to enhance the clamping effect of the two clamping jaws 1-2 and improve the stability of the clamping jaws 1-2 when clamping the material tray 1-6.

[0075] The slider 1-8 slides on the linear guide 1-7 along its length direction, and the linear guide 1-7 limits the movement trajectory of the slider 1-8 and the clamp 1-2 connected to the slider 1-8, provides certain support for the movement of the clamp 1-2, and maintains the stability of the clamp 1-2 during movement.

[0076] Preferably, as another embodiment of the present invention, Figure 9-14 The one-stage quantitative shrinking machine 2 shown includes a feeding bin 2-1, a conveying mechanism, a lower hopper and a collecting mechanism 2-13. The feeding end of the conveying mechanism is connected to the discharge port of the feeding bin 2-1, and the feeding end of the lower hopper is connected to the discharge end of the conveying mechanism. The upper end of the collecting mechanism 2-13 is evenly distributed along the circumference with a plurality of fixed positions for placing material trays 1-6. The collecting mechanism 2-13 drives the material tray 1-6 on any of the fixed positions to move to be connected to the discharge port of the lower hopper.

[0077] In this embodiment, after the material is put into the drop bin 2-1, it falls onto the conveying mechanism, and the conveying mechanism controls the amount of material falling into the lower hopper each time, so as to realize quantitative reduction of the material. The material in the lower hopper is finally collected by the material tray 1-6 placed on the collecting mechanism 2-13, and the conveying mechanism controls the quality of the material transferred to the lower hopper each time for reduction. The reduction device also includes a shell, and the shell can be made of existing technology, and its specific structure will not be described in detail. The structure of the shell in the attached figure can be used as one of the specific implementation methods.

[0078] Preferably, as another embodiment of the present invention, the conveying mechanism includes a belt conveyor 2-2, a weighing sensor, an adjustment plate 2-4 and an adjustment unit 2-5, the belt conveyor 2-2 is horizontally arranged and located below the discharge port of the drop bin 2-1, and two guide plates 2-3 are spaced apart above the conveyor belt of the belt conveyor 2-2, the upper end of the guide plate 2-3 is connected to the drop bin 2-1, and the lower end thereof is slidably fitted with the conveyor belt of the belt conveyor 2-2; a weighing sensor is provided on the belt conveyor 2-2, the adjustment plate 2-4 is arranged above the conveyor belt of the belt conveyor 2-2, and is connected to the adjustment unit 2-5 arranged on the drop bin 2-1, the adjustment unit 2-5 drives the adjustment plate 2-4 to move up and down to adjust the distance between its lower end and the conveyor belt of the belt conveyor 2-2, and the lower hopper is located below the discharge end of the conveying mechanism.

[0079] In this embodiment, two guide plates 2-3 are arranged above the conveyor belt of the belt conveyor 2-2, and the upper end of the guide plate 2-3 is connected to the drop bin 2-1. The guide plate 2-3 allows the material dropped from the drop bin 2-1 to stably drop onto the conveyor belt, and the material dropped onto the conveyor belt is between the two guide plates 2-3. At the same time, the movement of the material is limited by the adjustment plate 2-4. The adjustment plate 2-4, the conveyor belt and the two guide plates 2-3 together form an opening, so that the material can only be transmitted forward through the opening. The material after passing through the opening forms a fixed thickness, thereby ensuring that the material on the conveyor belt can be dropped evenly. The adjustment unit 2-5 drives the adjustment plate 2-4 to move up and down to adjust the height of the opening, that is, to adjust the thickness of the material after passing through the adjustment plate 2-4. Specifically, the adjustment unit 2-5 can adopt a telescopic cylinder.

[0080] Preferably, as another embodiment of the present invention, the lower hopper includes a hopper body 2-6, a lowering pipe 2-8, a guide cylinder 2-9, a baffle plate 2-10, a driving unit 2-11 and a telescopic cylinder 2-12, a guide groove 2-7 is provided at the upper end of the hopper body 2-6, the guide groove 2-7 is located below the discharge end of the conveying mechanism, the lowering pipe 2-8 is connected to the discharge port of the hopper body 2-6, the collecting mechanism 2-13 drives any of the material trays 1-6 on the fixed position to move to below the lowering pipe 2-8, the guide cylinder 2-9 It is coaxially arranged with the feeding tube 2-8, the lower end of the feeding tube 2-8 extends into the guide cylinder 2-9, the lower end of the guide cylinder 2-9 passes through the baffle plate 2-10 and is connected thereto, the driving unit 2-11 is arranged on the feeding tube 2-8 and is connected to the baffle plate 2-10 to drive the baffle plate 2-10 to move up and down, the telescopic cylinder 2-12 is sleeved at the connection between the feeding tube 2-8 and the guide cylinder 2-9, and the upper and lower ends thereof are respectively connected to the feeding tube 2-8 and the guide cylinder 2-9.

[0081] In this embodiment, the material falling from the discharge end of the conveying mechanism is allowed to enter the discharge pipe 2-8 through the guide groove 2-7, and then finally fall into the material tray 1-6 on the fixed position below the discharge pipe 2-8 through the guidance of the discharge pipe 2-8. Under the action of gravity, the material in the discharge pipe 2-8 will bounce upward after falling into the material tray 1-6. In order to prevent the material from bouncing out of the material tray 1-6, a baffle plate 2-10 and a guide cylinder 2-9 are provided. When discharging, the upper end opening of the material tray 1-6 is blocked by the baffle plate 2-10 and the guide cylinder 2-9. Specifically, after the empty material tray 1-6 moves to the bottom of the discharge pipe 2-8, the driving unit 2-11 drives the baffle plate 2-10 to move downward and press on the upper end of the material tray 1-6, and seals the upper end opening of the material tray 1-6. At this time, the discharge of the discharge pipe 2-8 is carried out. After the material is discharged from the discharge pipe 2-8, the driving unit 2-11 drives the baffle plate 2-10 to move upward to release the material tray 1-6. The connection between the discharge pipe 2-8 and the guide cylinder 2-9 is sealed by setting the telescopic cylinder 2-12 to prevent the material in the discharge pipe 2-8 from falling and flying out from the upper end of the guide cylinder 2-9 when it is lifted up. The telescopic cylinder 2-12 can be made of a telescopic tube, which is telescopic with the movement of the guide cylinder 2-9.

[0082] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the embodiments shown and described herein.

Claims

1. A coke sample preparation method, characterized in that: The following steps are involved: S1. Performing a first-level quantitative reduction on the coke sample to obtain a first process sample, a moisture sample and a first waste sample; S2, reducing the moisture sample obtained in S1 to obtain a moisture sample and a moisture sample storage sample; S3, pre-drying the first process sample obtained in S1 and then crushing it for the first time, and then performing the first secondary quantitative reduction after crushing to obtain a second process sample and a second waste sample; S4, crushing the second process sample obtained in S3 for a second time, and performing a second secondary quantitative reduction after crushing to obtain a third process sample and a third waste sample; S5, performing a third secondary quantitative reduction on the third process sample obtained in S4 to obtain a grinder washing sample, a grinding sample, and a test sample storage sample; S6. Grind the ground sample obtained in S5 to obtain a test sample. Before grinding, use the grinder obtained in S4 to wash the grinding equipment.

2. A coke sample preparation method as claimed in claim 1, characterized in that: The particle size of the coke sample in S1 is less than 13 mm.

3. A coke sample preparation method as claimed in claim 1, characterized in that: The first crushing in S3 uses a roller crusher, and the particle size of the first process sample after the first crushing is less than 6mm.

4. A coke sample preparation method as claimed in claim 1, characterized in that: The second crushing in S4 uses a double-roll crusher, and the particle size of the first process sample after the second crushing is less than 1mm.

5. A coke sample preparation method as claimed in claim 1, characterized in that: The particle size of the test sample obtained after grinding in S6 is less than 0.2 mm.

6. A coke sampling system, using a coke sampling method as claimed in any one of claims 1 to 5, characterized in that: The invention comprises a grabbing mechanism, and a primary quantitative shrinking machine, a secondary quantitative shrinking machine, a moisture sample shrinking machine, a grinder, a first crusher, a second crusher, a drying box and a raw material buffer rack packaging machine which are arranged around the grabbing mechanism.

7. A coke sample preparation system as claimed in claim 6, characterized in that: It also includes a sample feeding conveyor and a waste sample conveyor, the discharge end of the sample feeding conveyor extends to above the raw material buffer rack, and the grabbing mechanism can drive the material tray to move to the feed end of the waste sample conveyor, so as to transport the first waste sample in S1, the second waste sample in S3, the third waste sample in S4 and the washed grinder sample in S6 to the external recycling and processing equipment through the waste sample conveyor.

8. A coke sample preparation system as claimed in claim 7, characterized in that: It also includes a cleaning device, which is arranged above the waste sample conveyor. The grabbing mechanism drives the first-level quantitative shrinking machine, the second-level quantitative shrinking machine, the moisture sample shrinking machine, the grinder, the first crusher, the second crusher, the drying box and the material tray on the raw material cache rack to move to the cleaning device for cleaning.

9. A coke sample preparation system as claimed in claim 8, characterized in that: The cleaning device includes a cleaning box, a reduction motor, a roller and a brush. The cleaning box is arranged above the waste sample conveyor, and a discharge port is arranged at its lower end, and a feed port is arranged on its side wall. The roller is arranged in the cleaning box and is transmission-connected to the reduction motor arranged on the cleaning box. The roller is provided with an air inlet and a plurality of evenly distributed air outlets. The brush is arranged on the roller.

10. A coke sample preparation system as claimed in claim 6, characterized in that: It also includes a packaging machine, and the gripping mechanism can drive the material tray to move to the feeding end of the packaging machine, so that the moisture sample and moisture sample storage sample in S2, the test sample storage sample in S5 and the test sample in S6 are all packaged by the packaging machine.

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