Ore sample crushing and screening device and ore sample crushing and screening method

Abstract

The invention discloses an ore sample crushing and screening device and an ore sample crushing and screening method, which can improve the crushing efficiency of ore samples and obtain ore sample particles with uniform granularity and a large number so as to conveniently screen out the ore sample particles meeting the size requirement. The ore sample crushing and screening device comprises a crushing assembly and a screening assembly. The crushing assembly comprises a jaw type crushing mechanism, a crushing roller mechanism and a pulverizing mechanism. And the jaw crushing mechanism is used for extruding and crushing the received ore sample. The crushing roller mechanism is used for rolling and crushing the extruded and crushed ore sample, so that the boundary dimension of the rolled and crushed ore sample is smaller than or equal to a second preset dimension, and the second preset dimension is smaller than the first preset dimension. The grinding mechanism is used for grinding and crushing the ore sample subjected to rolling crushing, so that the boundary dimension of the ore sample subjected to rolling crushing is smaller than or equal to a third preset dimension, and the third preset dimension is smaller than the second preset dimension.

Description

Technical Field

[0001] The present invention belongs to the technical field of ore detection, and particularly relates to an ore sample crushing and screening device and an ore sample crushing and screening method. Background Art

[0002] In the process of coal sample analysis and detection, the role of the crushing device is crucial. Through crushing, a coal sample with uniform particle size and a large number of particles can be obtained, thereby reducing the sampling error and improving the accuracy and representativeness of sample preparation.

[0003] In the prior art, a support beam with a shunt plate is arranged at the feed inlet position in the crushing box. When lump coal falls into the crushing box from the feed inlet, it first contacts and buffers with the shunt plate supported by springs, and then falls between the crushing rolls after relatively unloading the force, avoiding direct collision with the equipment, improving the service life, having low noise, and low replacement cost. In addition, while the drive shaft drives the crushing rolls to rotate, it drives the suction fan to suck the suction groove, so that the dust gas in the box is quickly discharged, and the filter plate is cleaned irregularly under the action of the cleaning plate driven by the shunt plate.

[0004] However, when the above device crushes the coal sample, the process of refining the large coal sample by the crushing rolls is relatively long, the crushing efficiency is low, and the crushing effect is poor. It is difficult to obtain a coal sample with uniform particle size and a large number of particles, and it is also difficult to screen out coal sample particles that meet the size requirements. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an ore sample crushing and screening device and an ore sample crushing and screening method aiming at the above deficiencies existing in the prior art, which can improve the crushing efficiency of the ore sample and obtain ore sample particles with uniform particle size and a large number of particles, so as to facilitate screening out ore sample particles that meet the size requirements.

[0006] In a first aspect, an embodiment of the present invention provides an ore sample crushing and screening device, which includes a crushing component and a screening component. The crushing component (30) is used to crush the ore sample; the screening component is used to screen the ore sample crushed by the crushing component (30) so that the external dimension of the screened ore sample meets the fourth preset dimension. Among them, the crushing component includes a jaw crushing mechanism, a crushing roller mechanism and a grinding mechanism. The jaw crushing mechanism is used to crush the received ore sample by extrusion so that the external dimension of the ore sample after extrusion crushing is less than or equal to the first preset dimension. The crushing roller mechanism is used to crush the ore sample after extrusion crushing by rolling so that the external dimension of the ore sample after rolling crushing is less than or equal to the second preset dimension, and the second preset dimension is less than the first preset dimension. The grinding mechanism is used to crush the ore sample after rolling crushing by grinding so that the external dimension of the ore sample after grinding crushing is less than or equal to the third preset dimension, and the third preset dimension is less than the second preset dimension.

[0007] In some embodiments, the grinding mechanism includes a cap-shaped ring plate, a fine crushing disk and a first driving member. The cap-shaped ring plate is arranged directly below the crushing roller mechanism and is used to receive the ore sample crushed by the crushing roller mechanism; the shape of the cap-shaped ring plate is funnel-shaped, and a feed funnel is formed at the center of the cap-shaped ring plate. The fine crushing disk is vertically inserted into the middle of the feed funnel and has a gap with the side wall of the feed funnel; the minimum gap between the fine crushing disk and the side wall of the feed funnel is equal to the third preset dimension. The first driving member is in transmission connection with the fine crushing disk and is used to drive the fine crushing disk to rotate. The ore sample crushed by the crushing roller mechanism falls into the cap-shaped ring plate and enters the feed funnel, and is crushed by grinding under the rotation of the fine crushing disk.

[0008] In some embodiments, the longitudinal section of the fine crushing disk is trapezoidal; and / or, the outer surface of the fine crushing disk is coated with wear-resistant particles.

[0009] In some embodiments, the screening component includes a third screen and a fourth screen. The third screen is arranged directly below the cap-shaped ring plate, and the aperture size of the third screen is equal to the third preset dimension. The fourth screen is arranged directly below the third screen, and the aperture size of the fourth screen is smaller than the aperture size of the third screen.

[0010] In some embodiments, the first driving member is drivingly connected to the fine crushing disc through a movable rod; the movable rod is vertically arranged, the top end of the movable rod is fixed to the bottom of the fine crushing disc, and the bottom end of the movable rod passes through the third sieve and is drivingly connected to the first driving member. The screening assembly further includes a driving plate; the driving plate is arranged above the third sieve and is fixedly connected to the movable rod, and is used for rotating under the drive of the movable rod to stir the ore sample falling on the third sieve.

[0011] In some embodiments, a vibrating member is arranged on the fourth sieve to drive the fourth sieve to vibrate.

[0012] In some embodiments, the crushing roller mechanism includes a crushing roller and a second driving member. The crushing roller is arranged directly below the jaw crushing mechanism and the number is two; the axes of the two crushing rollers are parallel, and the distance between the two crushing rollers is a second preset size. The second driving member is drivingly connected to the two crushing rollers and is used for driving the two crushing rollers to rotate towards each other. The ore sample crushed by the jaw crushing mechanism falls between the two crushing rollers and is roll-crushed under the rotation of the two crushing rollers.

[0013] In some embodiments, the crushing roller mechanism further includes guide plates. The number of the guide plates is two, and the two guide plates are symmetrically arranged between the two crushing rollers and the jaw crushing mechanism; the two guide plates are inclined and are used for guiding the ore sample crushed by the jaw crushing mechanism to between the two crushing rollers.

[0014] In some embodiments, the ore sample crushing and screening device further includes a housing. The jaw crushing mechanism, the crushing roller mechanism, the grinding mechanism, and the screening assembly are all arranged in the housing. The jaw crushing mechanism includes a fixed pressing plate, a movable pressing plate, and a third driving member. The fixed pressing plate is fixed to the top inside the housing. The movable pressing plate is symmetrically arranged with the fixed pressing plate and is rotatably arranged at the top inside the housing; in the direction from top to bottom, the fixed pressing plate and the movable pressing plate gradually approach each other; the area between the fixed pressing plate and the movable pressing plate is used for receiving the ore sample. The third driving member is fixed inside the housing and is fixedly connected to the movable pressing plate, and is used for driving the movable pressing plate to reciprocally turn, so as to crush the ore sample entering between the fixed pressing plate and the movable pressing plate when the bottom of the movable pressing plate approaches the fixed pressing plate, and enable the ore sample with an outer dimension less than or equal to the first preset size after being crushingly broken to fall into the crushing roller mechanism through the gap between the fixed pressing plate and the movable pressing plate when the bottom of the movable pressing plate moves away from the fixed pressing plate.

[0015] In some embodiments, the ore sample crushing and screening device further includes a feeding assembly. The feeding assembly includes a feeding box, a transmission rod, and a fourth driving member. The feeding box is horizontally arranged above the housing; a feeding pipe is arranged at the top of the feeding box, and a discharge port is arranged at the bottom of the feeding box; the discharge port faces the position between the fixed pressing plate and the movable pressing plate. A spiral blade extending spirally in the horizontal direction is arranged on the outer side of the transmission rod. The fourth driving member is arranged on the feeding box and is connected to the transmission rod for driving the transmission rod to rotate, so as to drive the ore sample entering the feeding pipe to be conveyed from the feeding pipe to the discharge port through the spiral blade on the transmission rod and fall onto the position between the fixed pressing plate and the movable pressing plate of the jaw crushing mechanism.

[0016] In some embodiments, a first screen is further arranged between the jaw crushing mechanism and the crushing roller mechanism, and the aperture size of the first screen is set to a first preset size; and / or, a second screen is further arranged between the crushing roller mechanism and the grinding mechanism, and the aperture size of the second screen is set to a second preset size.

[0017] In summary, the ore sample crushing and screening device provided by the embodiments of the present invention crushes the received ore sample by setting a jaw crushing mechanism; crushes the ore sample after extrusion crushing by setting a crushing roller mechanism; and crushes the ore sample after rolling crushing by setting a grinding mechanism. That is to say, there are multiple crushing mechanisms with different crushing methods. In this way, after processing the ore samples of the same batch with the ore sample crushing and screening device of the embodiments of the present invention, the ore samples are fully crushed, and ore sample particles with more uniform particle size and more particles can be obtained, so that it is convenient for the screening assembly to screen the ore samples after grinding crushing to screen out the ore sample particles with the outer dimension meeting the target size, and improve the accuracy and representativeness of ore sample sample preparation. In addition, multiple different crushing methods run step by step, effectively improving the crushing efficiency of the ore.

[0018] Second aspect, an embodiment of the present invention further provides a method for crushing and screening ore samples. The method for crushing and screening ore samples uses the ore sample crushing and screening device in the first aspect, and the method includes: the jaw crushing mechanism squeezes and crushes the received ore samples so that the external dimensions of the ore samples after being squeezed and crushed by the jaw crushing mechanism are less than or equal to a first preset dimension; the crushing roller mechanism receives the ore samples after being squeezed and crushed by the jaw crushing mechanism and rolls and crushes the ore samples so that the external dimensions of the ore samples after being rolled and crushed are less than or equal to a second preset dimension, and the second preset dimension is less than the first preset dimension; the grinding mechanism receives the ore samples after being rolled and crushed by the crushing roller mechanism and grinds and crushes the ore samples so that the external dimensions of the ore samples after being ground and crushed are less than or equal to a third preset dimension, and the third preset dimension is less than the second preset dimension; the screening assembly receives the ore samples after being ground and crushed by the grinding mechanism and screens the external dimensions of the ore samples so that the external dimensions of the screened ore samples conform to a fourth preset dimension.

[0019] The method for crushing and screening ore samples provided by the embodiment of the present invention has the same beneficial effects as the above-mentioned ore sample crushing and screening device, which will not be elaborated here. Description of the Drawings

[0020] Figure 1 : A schematic diagram of an ore sample crushing and screening device provided by an embodiment of the present invention;

[0021] Figure 2 : A cross-sectional schematic diagram of a crushing assembly provided by an embodiment of the present invention;

[0022] Figure 3 : A cross-sectional schematic diagram of a grinding mechanism provided by an embodiment of the present invention;

[0023] Figure 4 : A partial structure diagram of a connecting mechanism provided by an embodiment of the present invention;

[0024] Figure 5 : A partial structure diagram of another connecting mechanism provided by an embodiment of the present invention;

[0025] Figure 6 : A cross-sectional schematic diagram of a crushing cylinder provided by an embodiment of the present invention;

[0026] Figure 7 : A cross-sectional schematic diagram of a processing box provided by an embodiment of the present invention;

[0027] Figure 8 : A cross-sectional schematic diagram of a feeding assembly provided by an embodiment of the present invention.

[0028] Among them, 10-processing box; 11-crushing cylinder; 20-feeding assembly; 30-crushing assembly; 40-connecting mechanism; 201-feeding box; 202-driving rod; 203-first motor; 204-feeding pipe; 205-discharging port; 301-fixed pressure plate; 302-dynamic pressure plate; 303-cylinder; 304-protrusion block; 305-first screen; 306-first crushing roller; 307-second crushing roller; 308-guide plate; 309-second screen; 31 0-hat-shaped ring plate; 311-third screen; 312-movable rod; 313-fine crushing disc; 314-driving plate; 315-fourth screen; 316-feeding port; 317-crushing port; 318-vibration motor; 319-second motor; 320-driving gear; 321-connecting rod; 322-driving gear; 323-driven gear; 401-driving rod; 402-driving bevel gear; 403-driven bevel gear; 404-synchronous pulley; 405-transmission belt. DETAILED DESCRIPTION

[0029] 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.

[0030] Example 1:

[0031] like Figure 1 As shown, an embodiment of the present invention provides an ore sample crushing and screening device, which is used in the ore detection process to crush the ore sample and screen out ore sample particles that meet the preset size.

[0032] For example, the ore sample may be coal ore, iron ore, etc.

[0033] like Figure 1 and Figure 2 As shown, the ore sample crushing and screening device includes a crushing component 30 and a screening component. The crushing component 30 is used to crush the ore sample. The screening component is used to screen the ore sample crushed by the crushing component 30, so that the outer dimensions of the screened ore sample meet the fourth preset size. Among them, the crushing component 30 includes a jaw crushing mechanism, a crushing roller mechanism and a crushing mechanism. The jaw crushing mechanism is used to squeeze and crush the received ore sample, so that the outer dimensions of the ore sample after squeezing and crushing are less than or equal to the first preset size. The crushing roller mechanism is used to roll and crush the ore sample after squeezing and crushing, so that the outer dimensions of the ore sample after rolling and crushing are less than or equal to the second preset size, and the second preset size is smaller than the first preset size. The crushing mechanism is used to roll and crush the ore sample after rolling and crushing, so that the outer dimensions of the ore sample after rolling and crushing are less than or equal to the third preset size, and the third preset size is smaller than the second preset size.

[0034] It should be noted that, in the ore sample crushing and screening device of this embodiment, the hardness of the material of the components that are in direct contact with the ore sample is greater than the hardness of the ore sample.

[0035] For example, Figure 1 and Figure 2 As shown, the ore sample crushing and screening device also includes a shell, and the jaw crushing mechanism, crushing roller mechanism, grinding mechanism, and screening assembly are all arranged in the shell.

[0036] like Figure 1 and Figure 2 As shown, the shell may include a processing box 10 and a crushing drum 11. The crushing drum 11 is fixed to the bottom of the processing box 10 by welding. The jaw crushing mechanism and the crushing roller mechanism are arranged in the processing box 10. The crushing mechanism and the screening assembly are arranged in the crushing drum 11 to avoid splashing of the ore sample during the crushing process.

[0037] In other examples, the jaw crushing mechanism and the crushing roller mechanism, the crushing roller mechanism and the crushing mechanism, and the crushing mechanism and the screening assembly can be connected by conveyor belts to achieve the transportation of crushed ore samples.

[0038] For example, Figure 2 As shown, the jaw crushing mechanism, the crushing roller mechanism, the crushing mechanism, and the screening assembly are arranged in sequence from top to bottom, and the movement direction of the ore sample in the ore sample crushing and screening device is from top to bottom.

[0039] The outer dimensions of the ore sample in this embodiment are the maximum values among the outer dimensions of the ore sample.

[0040] For example, the values of the first preset size, the second preset size, the third preset size, and the fourth preset size can be set according to actual conditions on site.

[0041] In some examples, the first preset size is set to 14 mm, the second preset size is set to 10 mm, the third preset size is set to 7 mm, and the fourth preset size is set to a range value, for example, 6 mm-7 mm (here 6 mm-7 mm means: less than or equal to 7 mm, and greater than 6 mm).

[0042] Exemplarily, an ore sample with a relatively large size (e.g., an outer dimension greater than 40 mm) first enters the jaw crushing mechanism for extrusion crushing. After extrusion crushing, the outer dimensions of the ore samples are all less than or equal to 14 mm. The ore samples after extrusion crushing then enter the crushing roller mechanism for rolling crushing. After rolling crushing, the outer dimensions of the ore samples are all less than or equal to 10 mm. The ore samples after rolling crushing then enter the grinding mechanism for grinding crushing. After grinding crushing, the outer dimensions of the ore samples are all less than or equal to 7 mm. Finally, the screening component screens out ore samples with outer dimensions of 6 mm - 7 mm from the ore samples with outer dimensions all less than or equal to 7 mm.

[0043] Through the step-by-step crushing by the jaw crushing mechanism, the crushing roller mechanism, and the grinding mechanism, the energy of the ore sample crushing and screening device can be utilized more effectively, the crushing efficiency can be improved, and the ore samples can be fully crushed. The ore samples can be crushed into a larger number of ore sample particles, and the uniformity of the crushing of the ore samples can be improved. As a result, ore sample particles with uniform particle size and a large number of particles can be obtained, enabling the screening component to screen out ore sample particles that meet the fourth preset size from a larger number of ore sample particles, improving the accuracy and representativeness of the ore sample preparation. The uniformly crushed ore samples are more conducive to subsequent analysis and detection, and can improve the accuracy of the ore sample assay.

[0044] Therefore, the ore sample crushing and screening device provided by the embodiment of the present invention performs extrusion crushing on the received ore samples by setting the jaw crushing mechanism; performs rolling crushing on the ore samples after extrusion crushing by setting the crushing roller mechanism; and performs grinding crushing on the ore samples after rolling crushing by setting the grinding mechanism. That is to say, there are multiple crushing mechanisms with different crushing methods. In this way, after processing the ore samples of the same batch using the ore sample crushing and screening device of the embodiment of the present invention, the ore samples are fully crushed, and ore sample particles with more uniform particle size and a large number of particles can be obtained, facilitating the screening component to screen the ore samples after grinding crushing to screen out ore sample particles with outer dimensions that meet the target size, improving the accuracy and representativeness of the ore sample preparation. In addition, the multiple different crushing methods operate step by step, effectively improving the crushing efficiency of the ore.

[0045] In some embodiments, such as Figure 2 , Figure 3 , Figure 4 and Figure 5As shown in the figure, the crushing mechanism includes a cap-shaped ring plate 310, a fine crushing disk 313, and a first driving member. The cap-shaped ring plate 310 is arranged directly below the crushing roller mechanism and is used to receive the ore samples crushed by the rolling of the crushing roller mechanism; the cap-shaped ring plate 310 is funnel-shaped, and a feeding funnel is formed at the center of the cap-shaped ring plate 310. The fine crushing disk 313 is vertically inserted into the middle of the feeding funnel, and there is a gap between the fine crushing disk 313 and the side wall of the feeding funnel; the minimum gap between the fine crushing disk 313 and the side wall of the feeding funnel is equal to the third preset dimension. The first driving member is in transmission connection with the fine crushing disk 313 and is used to drive the fine crushing disk 313 to rotate. The ore samples crushed by the crushing roller mechanism fall into the cap-shaped ring plate 310 and enter the feeding funnel, and are crushed by rolling under the rotation of the fine crushing disk 313.

[0046] Exemplarily, the cap-shaped ring plate 310 is fixed to the top of the crushing cylinder 11. The middle part of the cap-shaped ring plate 310 is recessed downward, so that the ore samples falling on the cap-shaped ring plate 310 will move toward the middle under the action of gravity and enter the feeding funnel.

[0047] In some examples, wear-resistant particles are laid on the outer surface of the crushing disk 313.

[0048] Exemplarily, the material of the above-mentioned wear-resistant particles can be alumina, quartz, etc. The material of the wear-resistant particles has a relatively high hardness, so it can achieve a better rolling and crushing effect on the ore samples.

[0049] Exemplarily, the first driving member can be a rotating motor. The rotating shaft of the rotating motor is arranged vertically and is connected to the fine crushing disk 313 to drive the fine crushing disk 313 to rotate around its own vertical axis.

[0050] It can be understood that Figure 3 in the above, the minimum gap between the fine crushing disk 313 and the side wall of the feeding funnel is the bottom of the gap between the fine crushing disk 313 and the side wall of the feeding funnel, that is, the position where the ore samples flow out of the feeding funnel. By setting the gap size at this place to the third preset dimension, the ore samples smaller than or equal to the third preset dimension can flow out.

[0051] As Figure 3 shown, the ore samples entering the feeding funnel will enter the gap between the outer peripheral surface of the fine crushing disk 313 and the side wall of the feeding funnel. During the rotation of the fine crushing disk 313, the high-hardness wear-resistant particles on the surface of the fine crushing disk 313 impact, shear, and extrude the ore samples. The mechanical force generated during the impact, shear, and extrusion processes causes the ore samples to be gradually broken into small pieces and further refined under the continuous rotation of the fine crushing disk 313, and finally obtain ore sample particles with a smaller (less than or equal to the third preset dimension) and uniform external dimension.

[0052] With the above settings, the first driving member can drive the fine crushing disk 313 to rotate, so as to roll and crush the ore sample entering the feeding funnel.

[0053] In some examples, as Figure 3 shown, the longitudinal section of the fine crushing disk 313 is trapezoidal.

[0054] At this time, the gap between the outer peripheral surface of the fine crushing disk 313 and the side wall of the feeding funnel is larger at the top and smaller at the bottom, so that the ore sample entering the feeding funnel can be continuously rolled and crushed into smaller ore sample particles during the process of moving from top to bottom.

[0055] In some embodiments, as Figure 6 shown, the screening assembly includes a third screen 311 and a fourth screen 315. The third screen 311 is arranged directly below the cap-shaped ring plate 310, and the aperture size of the third screen 311 is equal to the third preset size. The fourth screen 315 is arranged directly below the third screen 311, and the aperture size of the fourth screen 315 is smaller than the aperture size of the third screen 311.

[0056] Exemplarily, both the third screen 311 and the fourth screen 315 are detachably arranged on the inner side wall of the crushing cylinder 11, for example, fixed on the inner side wall of the crushing cylinder 11 by snap fasteners.

[0057] The aperture sizes of the third screen 311 and the fourth screen 315 can be set according to the fourth preset size.

[0058] For example, the fourth preset size is a range value, for example, 6 mm - 7 mm. Then, the aperture size of the third screen 311 can be set to 7 mm, and the aperture size of the fourth screen 315 can be set to 6 mm.

[0059] As Figure 6 shown, the ore sample passing through the feeding funnel of the cap-shaped ring plate 310 will fall on the third screen 311. At this time, the ore sample with an outer dimension greater than 7 mm will be retained on the third screen 311, and the ore sample with an outer dimension less than 7 mm will pass through the third screen 311 and be on the fourth screen 315; at this time, the ore sample with an outer dimension greater than 6 mm will be retained on the fourth screen 315, and the ore sample with an outer dimension less than 6 mm will pass through the fourth screen 315 and fall to the bottom of the crushing cylinder 11.

[0060] Through the screening action of the third screen 311 and the fourth screen 315, the outer dimension of the ore sample finally retained on the fourth screen 315 can meet the requirements of the fourth preset size (outer dimension of 6 mm - 7 mm).

[0061] Combined with Figure 3 and Figure 6 , Figure 3A material taking port 316 is formed on the right side of the medium crushing cylinder 11, and a material crushing port 317 is formed on the left side of the crushing cylinder 11.

[0062] An operator can take out ore samples whose outer dimensions meet the fourth preset dimension through the material taking port 316, and can clean the crushed ore samples that fall to the bottom of the crushing cylinder 11 through the fourth screen 315 through the material crushing port 317.

[0063] In some embodiments, as Figure 5 shown, the first driving member is in transmission connection with the fine crushing disc 313 through the movable rod 312; the movable rod 312 is vertically arranged, the top end of the movable rod 312 is fixed to the bottom of the fine crushing disc 313, and the bottom end of the movable rod 312 passes through the third screen 311 and is in transmission connection with the first driving member.

[0064] At this time, the first driving member can be a rotating motor arranged below the third screen 311, the rotating shaft of the rotating motor is vertically arranged and is connected to the bottom end of the movable rod 312.

[0065] As Figure 5 and Figure 6 shown, the screening assembly further includes a driving plate 314. The driving plate 314 is arranged above the third screen 311 and is fixedly connected to the movable rod 312 for rotating under the drive of the movable rod 312 to stir the ore samples falling on the third screen 311.

[0066] Exemplarily, the driving plate 314 can be a vertically arranged metal plate, and the number is one or more. The metal plates are fixed to the outside of the movable rod 312 along the circumferential direction of the movable rod 312.

[0067] Exemplarily, the bottom of the driving plate 314 can be in contact with the upper surface of the third screen 311.

[0068] When the movable rod 312 rotates, it can drive the driving plate 314 to rotate, so as to stir the ore samples falling on the third screen 311, so as to accelerate the ore samples on the third screen 311 to fall through the mesh holes of the third screen 311, and accelerate the screening effect of the third screen 311.

[0069] In some embodiments, as Figure 5 shown, a vibrating member is arranged on the fourth screen 315 to drive the fourth screen 315 to vibrate.

[0070] Exemplarily, as Figure 5 shown, the vibrating member can be a vibrating motor 318.

[0071] When the vibrating motor 318 vibrates, it drives the fourth screen 315 to vibrate, so as to accelerate the ore samples on the fourth screen 315 to fall through the mesh holes of the fourth screen 315, and accelerate the screening effect of the fourth screen 315.

[0072] In some embodiments, as Figure 7 shown, the crushing roller mechanism includes a crushing roller and a second driving member. The crushing roller is disposed directly below the jaw crushing mechanism and there are two of them. The axes of the two crushing rollers are parallel, and the distance between the two crushing rollers is a second preset dimension. The second driving member is in transmission connection with the two crushing rollers and is used to drive the two crushing rollers to rotate towards each other. The ore sample crushed by the jaw crushing mechanism falls between the two crushing rollers and is rolled and crushed under the rotation of the two crushing rollers.

[0073] Exemplarily, in combination with Figure 2 and Figure 7 , the two crushing rollers are respectively a first crushing roller 306 and a second crushing roller 307. Figure 7 In

[0074] , the first crushing roller 306 is located on the right side inside the crushing cylinder 11, and the second crushing roller 307 is located on the left side inside the crushing cylinder 11.

[0075] Exemplarily, the second driving member can be a rotating motor. The rotating motor is respectively connected to the rotating shafts of the first crushing roller 306 and the second crushing roller 307 through gears to drive the first crushing roller 306 and the second crushing roller 307 to rotate simultaneously.

[0076] Exemplarily, a reversing gear is further provided between the rotating motor and the rotating shaft of the first crushing roller 306, so that when the rotating motor drives the first crushing roller 306 and the second crushing roller 307 to rotate, the rotating directions of the first crushing roller 306 and the second crushing roller 307 are opposite.

[0077] In some embodiments, the first driving member is reused as the second driving member.

[0078] That is, the first driving member and the second driving member are the same driving member.

[0079] Exemplarily, in combination with Figure 4 , Figure 5 and Figure 7 , the first driving member and the second driving member are the same second motor 319.

[0080] Referring to Figure 4, a second motor 319 is fixedly connected to the rear side of the processing box 10 through a mounting bracket. The output end of the second motor 319 is fixedly connected to the rotating shaft of the first crushing roller 306. A driving gear 320 is fixedly connected to the outer side of the rotating shaft of the first crushing roller 306 (the part extending outside the processing box 10). A driven gear 323 is fixedly connected to the outer side of the rotating shaft of the second crushing roller 307 (the part extending outside the processing box 10). A pair of driving gears 322 that mesh with each other are arranged between the driving gear 320 and the driven gear 323. Each driving gear 322 is rotatably connected to the rear side wall of the processing box 10 through a connecting rod 321. Figure 4 The driving gear 322 located on the left side in it meshes with the driving gear 320. Figure 4 The driving gear 322 located on the right side in it meshes with the driven gear 323.

[0081] During use, the second motor 319 is started through an external power supply. The output end of the second motor 319 drives the rotating shaft of the first crushing roller 306 and the first crushing roller 306 to rotate clockwise, and drives the driving gear 320 to rotate in the same direction. Through the transmission of the two driving gears 322, the driven gear 323 rotates counterclockwise, thereby driving the rotating shaft of the second crushing roller 307 and the second crushing roller 307 to rotate counterclockwise, so as to achieve the effect that the first crushing roller 306 and the second crushing roller 307 rotate towards each other.

[0082] Reference Figure 5 , a connecting mechanism 40 is arranged inside the crushing cylinder 11. The connecting mechanism 40 includes a driving rod 401 rotatably connected to the right side of the crushing cylinder 11. The driving rod 401 is supported on the inner side wall of the crushing cylinder 11 through a bracket. A driving bevel gear 402 is fixedly connected to the left side of the driving rod 401. A driven bevel gear 403 is vertically meshed with the top of the driving bevel gear 402. The driven bevel gear 403 is fixedly connected to the bottom of the movable rod 312. Combining Figure 4 and Figure 5 , synchronous belt wheels 404 are installed on the outer sides of the driving rod 401 (the part extending outside the processing box 10) and the output end of the second motor 319. A transmission belt 405 is commonly meshed on the outer sides of the two synchronous belt wheels 404.

[0083] When the output end of the second motor 319 rotates, it will drive the synchronous belt wheel 404 on the outer side of the output end of the second motor 319 to rotate, and through the transmission of the synchronous belt wheel 404 on the outer side of the driving rod 401 and the transmission belt 405, the driving rod 401 and the driving bevel gear 402 are driven to rotate. Then, through the transmission of the driving bevel gear 402 and the driven bevel gear 403, the movable rod 312 is driven to rotate, so that the movable rod 312 drives the fine crushing disc 313 and the driving plate 314 to rotate.

[0084] With the above settings, the fine crushing disc 313, the first crushing roller 306, and the second crushing roller 307 can be driven to rotate simultaneously by the same second motor 319, reducing the total number of driving components in the ore sample crushing and screening device.

[0085] In some embodiments, as Figure 7 shown, the crushing roller mechanism further includes guide plates 308. The number of guide plates 308 is two, and the two guide plates 308 are symmetrically arranged between the two crushing rollers and the jaw crushing mechanism; the two guide plates 308 are inclined to guide the ore samples crushed by the jaw crushing mechanism to between the two crushing rollers.

[0086] As Figure 7 shown, the two guide plates 308 are both fixed on the inner side wall of the crushing cylinder 11. The bottom of the guide plate 308 inclines downward and towards the position between the two crushing rollers.

[0087] With the above settings, after the ore samples falling from the jaw crushing mechanism land on the two guide plates 308, they will be guided to between the two crushing rollers to converge the ore samples, facilitating the two crushing rollers to roll and crush the ore samples.

[0088] In some embodiments, as Figure 7 shown, the jaw crushing mechanism includes a fixed pressure plate 301, a moving pressure plate 302, and a third driving member. The fixed pressure plate 301 is fixed at the top inside the housing. The moving pressure plate 302 is symmetrically arranged with the fixed pressure plate 301 and is rotatably arranged inside the housing through its top. In the direction from top to bottom, the fixed pressure plate 301 and the moving pressure plate 302 gradually approach; the area between the fixed pressure plate 301 and the moving pressure plate 302 is used to receive ore samples. The third driving member is fixed inside the housing and is fixedly connected to the moving pressure plate 302, and is used to drive the moving pressure plate 302 to reciprocally flip, so as to crush the ore samples entering between the fixed pressure plate 301 and the moving pressure plate 302 when the bottom of the moving pressure plate 302 approaches the fixed pressure plate 301, and enable the ore samples after extrusion and crushing with an outer dimension less than or equal to the first preset dimension to fall through the gap between the fixed pressure plate 301 and the moving pressure plate 302 into the crushing roller mechanism when the bottom of the moving pressure plate 302 moves away from the fixed pressure plate 301.

[0089] As Figure 7 shown, the fixed pressure plate 301 is fixed on the left side of the inner side wall of the processing box 10, and the moving pressure plate 302 is rotatably arranged on the right side of the inner side wall of the processing box 10 through a hinge member (such as a hinge).

[0090] Exemplarily, as Figure 7As shown, the third driving member can be a cylinder 303. The output end of the cylinder 303 is hinged to the middle of the moving platen 302 through a hinge member (such as a rotating shaft). When the cylinder 303 operates, the output end (piston rod) of the cylinder 303 will extend and retract, thereby driving the bottom of the moving platen 302 to move closer to or away from the fixed platen 301.

[0091] Exemplarily, as Figure 7 shown, the fixed platen 301 and the moving platen 302 are designed in a mirror image, and a set of raised blocks 304 are fixedly connected to the opposite sides of the fixed platen 301 and the moving platen 302. The raised blocks 304 can be strip-shaped protrusions. The raised blocks 304 can reduce the contact area with the ore sample, thereby increasing the pressure on the ore sample and improving the extrusion and crushing effect on the ore sample.

[0092] As Figure 7 shown, after the large ore sample enters the interior of the processing box 10, it will fall between the fixed platen 301 and the moving platen 302. Before that, the cylinder 303 is started through an external power supply. The output end of the cylinder 303 drives the moving platen 302 to rotate around the hinge point as the center, so that the moving platen 302 makes a reciprocating rotational motion. When the moving platen 302 rotates clockwise, it approaches the fixed platen 301. The extrusion force applied by the cylinder 303 on the moving platen 302 squeezes the ore sample through the raised blocks 304 to break the ore sample. When the moving platen 302 rotates counterclockwise, the moving platen 302 moves away from the fixed platen 301, so that the space between the moving platen 302 and the fixed platen 301 becomes larger, so that the broken ore sample slides downward. Figure 7 In [the figure], when the outer dimension of the ore sample is smaller than the lateral dimension of the bottommost gap between the moving platen 302 and the fixed platen 301, the ore sample drops to the crushing roller mechanism.

[0093] The cylinder 303 drives the moving platen 302 to reciprocally rotate to squeeze and crush the ore sample by the moving platen 302, thereby breaking the large ore sample into smaller-sized ore samples, which is convenient for the subsequent continuous processing of the crushing roller mechanism.

[0094] In some embodiments, as Figure 1 and Figure 8As shown, the ore sample crushing and screening device further includes a feeding assembly 20. The feeding assembly 20 includes a feeding box 201, a transmission rod 202, and a fourth driving member. The feeding box 201 is horizontally arranged above the housing; a feeding pipe 204 is provided at the top of the feeding box 201, and a discharge port 205 is provided at the bottom of the feeding box 201; the discharge port 205 faces the position between the fixed pressing plate 301 and the movable pressing plate 302. A spiral blade extending spirally in the horizontal direction is provided on the outer side of the transmission rod 202. The fourth driving member is arranged on the feeding box 201 and is connected to the transmission rod 202 for driving the transmission rod 202 to rotate, so as to drive the ore sample entering the feeding pipe 204 to be conveyed from the feeding pipe 204 to the discharge port 205 through the spiral blade on the transmission rod 202 and fall into the position between the fixed pressing plate 301 and the movable pressing plate 302 of the jaw crushing mechanism.

[0095] As Figure 1 shown, the feeding box 201 is horizontally arranged on the top of the processing box 10, for example, fixed to the top of the processing box 10 by welding.

[0096] As Figure 1 and Figure 8 shown, the inside of the feeding box 201 has a horizontal channel. The feeding pipe 204 is communicated with the horizontal channel, and the ore sample enters the horizontal channel inside the feeding box 201 through the feeding pipe 204.

[0097] Exemplarily, the transmission rod 202 is arranged along the extending direction of the horizontal channel.

[0098] Exemplarily, as Figure 8 shown, the fourth driving member can be a first motor 203. The first motor 203 is fixed on the outer side wall of the feeding box 201, and the output end of the first motor 203 is connected to the transmission rod 202 to drive the transmission rod 202 to rotate around its own axis.

[0099] As Figure 8 shown, the ore sample enters the inside of the feeding box 201 through the feeding pipe 204, and the first motor 203 is started in advance through an external power supply. The output end of the first motor 203 drives the threaded blade 202 to rotate, so as to drive the ore sample to move from Figure 8 the left side to the right side in

[0100] Finally, the ore sample enters the inside of the processing box 10 through the discharge port 205, and the ore sample is crushed by the jaw crushing mechanism. When the above-mentioned feeding assembly 20 conveys the coal sample, it can evenly convey the ore sample into the inside of the processing box 10, thereby effectively preventing the ore sample from being blocked and accumulated in the feeding assembly 20.

[0101] In some embodiments, as Figure 2As shown, a first screen 305 is further provided between the jaw crushing mechanism and the crushing roller mechanism, and the aperture size of the first screen 305 is set to a first preset size.

[0102] As described above, the jaw crushing mechanism is used to crush the ore sample by extrusion, so that the external dimension of the ore sample after extrusion crushing is less than or equal to the first preset size.

[0103] The first screen 305 can screen the ore sample after extrusion crushing to prevent ore samples with external dimensions larger than the first preset size (such as vertically long strip-shaped ore samples) from entering the crushing roller mechanism.

[0104] Exemplarily, a vibrating member is further provided on the first screen 305. The vibrating member is also a vibrating motor 318, for example, to accelerate the screening of the ore sample by the first screen 305.

[0105] In some embodiments, a second screen 309 is further provided between the crushing roller mechanism and the grinding mechanism, and the aperture size of the second screen 309 is set to a second preset size.

[0106] As described above, the crushing roller mechanism is used to crush the ore sample after extrusion crushing by rolling, so that the external dimension of the ore sample after rolling crushing is less than or equal to the second preset size.

[0107] The second screen 309 can screen the ore sample after rolling crushing to prevent ore samples with external dimensions larger than the second preset size (such as vertically long strip-shaped ore samples) from entering the grinding mechanism.

[0108] Embodiment 2:

[0109] The embodiment of the present invention further provides a method for crushing and screening ore samples, which is used to crush ore samples and screen out ore sample particles that meet the preset size.

[0110] Exemplarily, the ore sample can be coal ore, iron ore, etc.

[0111] This method for crushing and screening ore samples uses the ore sample crushing and screening device in Embodiment 1, and this method includes: steps S1 - S4.

[0112] S1. The jaw crushing mechanism crushes the received ore sample by extrusion, so that the external dimension of the ore sample after being crushed by the jaw crushing mechanism is less than or equal to the first preset size.

[0113] Exemplarily, the external dimension of the ore sample in this embodiment is the maximum value among the external dimensions of the ore sample.

[0114] Exemplarily, the ore samples received by the jaw crushing mechanism have relatively large external dimensions, such as ore samples with external dimensions greater than 40 mm. Through extrusion, the ore samples with larger dimensions can be quickly crushed.

[0115] Exemplarily, the values of the first preset dimension, the second preset dimension, the third preset dimension, and the fourth preset dimension can be set according to the actual on-site situation.

[0116] In some examples, the first preset dimension is 14 mm, the second preset dimension is 10 mm, the third preset dimension is 7 mm, and the fourth preset dimension is a range value, such as 6 mm - 7 mm.

[0117] S2. The crushing roller mechanism receives the ore samples that have been crushed by extrusion by the jaw crushing mechanism, and performs rolling crushing on the ore samples, so that the external dimensions of the ore samples after rolling crushing are less than or equal to the second preset dimension, and the second preset dimension is less than the first preset dimension.

[0118] Exemplarily, a conveyor belt is provided between the crushing roller mechanism and the jaw crushing mechanism to convey the ore samples that have been crushed by extrusion by the jaw crushing mechanism to the crushing roller mechanism.

[0119] S3. The grinding mechanism receives the ore samples that have been crushed by rolling by the crushing roller mechanism, and performs grinding crushing on the ore samples, so that the external dimensions of the ore samples after grinding crushing are less than or equal to the third preset dimension, and the third preset dimension is less than the second preset dimension.

[0120] Exemplarily, a conveyor belt is provided between the grinding mechanism and the crushing roller mechanism to convey the ore samples that have been crushed by rolling by the crushing roller mechanism to the grinding mechanism.

[0121] S4. The screening component receives the ore samples that have been crushed by grinding by the grinding mechanism, and screens the external dimensions of the ore samples, so that the external dimensions of the screened ore samples conform to the fourth preset dimension.

[0122] Exemplarily, a conveyor belt is provided between the grinding mechanism and the screening component to convey the ore samples that have been crushed by grinding by the grinding mechanism to the screening component.

[0123] Exemplarily, the screening component includes a third screen 311 and a fourth screen 315. The pore size of the third screen 311 is set to 7 mm, and the pore size of the fourth screen 315 is set to 6 mm to screen out ore samples with external dimensions greater than 6 mm and less than or equal to 7 mm.

[0124] Through the step-by-step crushing of the jaw crushing mechanism, the crushing roller mechanism, and the grinding mechanism, the energy of the ore sample crushing and screening device can be utilized more effectively, the crushing efficiency can be improved, and the ore sample can be fully crushed. The ore sample can be crushed into a larger number of ore sample particles, and the uniformity of the ore sample crushing is improved, so as to obtain ore sample particles with uniform particle size and a large number of particles, enabling the screening component to screen out ore sample particles that meet the target size from a larger number of ore sample particles, improving the accuracy and representativeness of the ore sample preparation. The uniformly crushed ore sample is more conducive to subsequent analysis and testing, and can improve the accuracy of the ore sample analysis.

[0125] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present invention. However, 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 regarded as the protection scope of the present invention.

Claims

1. An ore sample crushing and screening device, characterized in that, It includes a crushing component (30) and a screening component; The crushing assembly (30) is used to crush the ore sample; The screening component is used to screen the ore sample crushed by the crushing component (30) so that the outer dimensions of the screened ore sample conform to a fourth preset dimension; Wherein, the crushing assembly (30) includes a jaw crushing mechanism, a crushing roller mechanism and a grinding mechanism; The jaw crushing mechanism is used to squeeze and crush the received ore sample so that the outer dimensions of the ore sample after squeezing and crushing are less than or equal to a first preset dimension; The crushing roller mechanism is used to roll and crush the ore sample after the extrusion crushing, so that the outer size of the ore sample after the rolling crushing is less than or equal to a second preset size, and the second preset size is smaller than the first preset size; and The crushing mechanism is used to crush the ore sample after rolling crushing, so that the outer size of the ore sample after rolling crushing is less than or equal to a third preset size, and the third preset size is smaller than the second preset size.

2. The ore sample crushing and screening device according to claim 1, wherein, The crushing mechanism comprises: a cap-shaped ring plate (310) disposed directly below the crushing roller mechanism and used for receiving the ore sample after rolling and crushing by the crushing roller mechanism; the cap-shaped ring plate (310) is funnel-shaped, and the center of the cap-shaped ring plate (310) forms a feeding funnel; A fine crushing plate (313) is vertically inserted in the middle of the feeding funnel and has a gap between it and the side wall of the feeding funnel; the minimum gap between the fine crushing plate (313) and the side wall of the feeding funnel is equal to a third preset size; and, a first driving member, in transmission connection with the fine crushing disc (313), for driving the fine crushing disc (313) to rotate; The ore sample crushed by the crushing roller mechanism falls into the cap-shaped ring plate (310) and enters the feeding funnel, where it is crushed by the rotation of the fine crushing disc (313).

3. The ore sample crushing and screening device according to claim 2, wherein, The longitudinal section of the crushing plate (313) is trapezoidal in shape; and / or, The outer surface of the crushing disk (313) is coated with wear-resistant particles.

4. The ore sample crushing and screening device according to claim 2, wherein The screening component includes: a third screen (311), disposed directly below the cap-shaped ring plate (310), wherein the aperture size of the third screen 311 is equal to the third preset size; and The fourth screen (315) is arranged directly below the third screen (311), and the aperture size of the fourth screen (315) is smaller than the aperture size of the third screen (311).

5. The ore sample crushing and screening device according to claim 4, wherein, The first driving member is connected to the crushing plate (313) through a movable rod (312); the movable rod (312) is vertically arranged, the top end of the movable rod (312) is fixed to the bottom of the crushing plate (313), and the bottom end of the movable rod (312) passes through the third screen (311) and is connected to the first driving member through a movable rod (312); The screening component further includes a driving plate (314); the driving plate (314) is arranged above the third screen (311) and fixedly connected to the movable rod (312), and is used to rotate under the drive of the movable rod (312) to stir the ore sample falling on the third screen (311).

6. The ore sample crushing and screening device according to claim 5, characterized in that, A vibrating member is arranged on the fourth screen (315) to drive the fourth screen (315) to vibrate.

7. The ore sample crushing and screening device according to claim 2, characterized in that, The crushing roll mechanism includes: Crushing rolls, arranged directly below the jaw crushing mechanism, and the number is two; the axes of the two crushing rolls are parallel, and the distance between the two crushing rolls is a second preset size; and, A second driving member, drivingly connected to the two crushing rolls, and used to drive the two crushing rolls to rotate towards each other; The ore sample crushed by the jaw crushing mechanism falls between the two crushing rolls and is rolled and crushed under the rotation of the two crushing rolls.

8. The ore sample crushing and screening device according to claim 7, characterized in that, The crushing roll mechanism further includes a guide plate (308); The number of the guide plates (308) is two, and the two guide plates (308) are symmetrically arranged between the two crushing rolls and the jaw crushing mechanism; the two guide plates (308) are inclined and used to guide the ore sample crushed by the jaw crushing mechanism to between the two crushing rolls.

9. The ore sample crushing and screening device according to claim 1, wherein It further includes a housing; The jaw crushing mechanism, the crushing roll mechanism, the grinding mechanism, and the screening component are all arranged in the housing; The jaw crushing mechanism includes: A fixed pressure plate (301), fixed to the top inside the housing; A movable pressure plate (302), symmetrically arranged with the fixed pressure plate (301) and rotatably arranged at the top inside the housing; in the direction from top to bottom, the fixed pressure plate (301) and the movable pressure plate (302) gradually approach; the area between the fixed pressure plate (301) and the movable pressure plate (302) is used to receive the ore sample; and, A third driving member, fixed inside the housing and fixedly connected to the movable pressure plate (302), and used to drive the movable pressure plate (302) to reciprocally turn, so as to crush the ore sample entering between the fixed pressure plate (301) and the movable pressure plate (302) when the bottom of the movable pressure plate (302) approaches the fixed pressure plate (301), and when the bottom of the movable pressure plate (302) moves away from the fixed pressure plate (301), the ore sample with an outer dimension less than or equal to the first preset size after being crushed by extrusion passes through the gap between the fixed pressure plate (301) and the movable pressure plate (302) and falls into the crushing roll mechanism.

10. The ore sample crushing and screening device according to claim 9, characterized in that, It further includes a feeding component (20); The feeding component (20) includes: A feeding box (201), horizontally arranged above the housing; a feeding pipe (204) is arranged at the top of the feeding box (201), and a discharge port (205) is arranged at the bottom of the feeding box (201); the discharge port (205) faces the position between the fixed pressure plate (301) and the movable pressure plate (302); The transmission rod (202), a spiral blade extending spirally in the horizontal direction is arranged on the outer side of the transmission rod (202); and, The fourth driving member is arranged on the feeding box (201) and is connected to the transmission rod (202), and is used to drive the transmission rod (202) to rotate, so as to drive the ore sample entering the feeding pipe (204) to be conveyed from the feeding pipe (204) to the discharge port (205) through the spiral blade on the transmission rod (202), and fall into the position between the fixed pressing plate (301) and the moving pressing plate (302) of the jaw crushing mechanism.

11. The ore sample crushing and screening device according to claim 1, wherein A first screen (305) is further arranged between the jaw crushing mechanism and the crushing roller mechanism, and the aperture size of the first screen (305) is set to a first preset size; and / or, A second screen (309) is further arranged between the crushing roller mechanism and the grinding mechanism, and the aperture size of the second screen (309) is set to a second preset size.

12. A method for crushing and screening ore samples, characterized in that, Using the ore sample crushing and screening device according to any one of claims 1-11, the method includes: The jaw crushing mechanism performs extrusion crushing on the received ore sample, so that the outer dimension of the ore sample after being extruded and crushed by the jaw crushing mechanism is less than or equal to the first preset size; The crushing roller mechanism receives the ore sample after being extruded and crushed by the jaw crushing mechanism, and performs rolling crushing on the ore sample, so that the outer dimension of the ore sample after rolling crushing is less than or equal to the second preset size, and the second preset size is less than the first preset size; The grinding mechanism receives the ore sample after being rolled and crushed by the crushing roller mechanism, and performs grinding crushing on the ore sample, so that the outer dimension of the ore sample after grinding crushing is less than or equal to the third preset size, and the third preset size is less than the second preset size; The screening assembly receives the ore sample after being ground and crushed by the grinding mechanism, and screens the outer dimension of the ore sample, so that the outer dimension of the screened ore sample conforms to the fourth preset size.

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