Coal quality automatic test and rapid sample preparation device

Abstract

The utility model discloses a rapid sample preparation device for automatic coal quality testing. The rapid sample preparation device comprises a crusher and a division machine, the crusher is used for crushing a coal sample, a screening drawer is arranged at a discharge port of the crusher, and screening holes are formed in the bottom of the screening drawer; a feed port of the division machine is connected with a discharge port of the crusher, the division machine is used for dividing the coal sample screened by the screening drawer, a reserved sample container is arranged below a reserved sample discharge port of the division machine, and a rejected sample container is arranged below a rejected sample discharge port of the division machine. According to the utility model, the crushing, screening and division steps of coal quality test sample preparation can be automatically completed through one device, so that the manpower consumption is reduced, and the sample preparation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of coal quality testing technology, specifically to an automated rapid sample preparation device for coal quality testing. Background Technology

[0002] Coal quality testing is the process of detecting and analyzing the quality of coal, aiming to evaluate various physical and chemical properties and indicators of coal, and to provide a scientific basis for coal mining, processing, sales and use.

[0003] Coal quality analysis sample preparation refers to the process of preparing representative analytical samples that meet the testing requirements from collected raw coal samples. The quality of sample preparation directly affects the accuracy of test results and must follow the principle of "reducing particle size, reducing mass, and maintaining representativeness," through step-by-step processing such as crushing, sieving, and reduction. The purpose of crushing is to reduce the particle size of the coal sample, increase the number of particles, and create conditions for reduction; the purpose of sieving is to ensure that the particle size of the coal sample meets the reduction requirements at each stage, and particles that do not pass through the sieve holes need to be returned for re-crushing; the purpose of reduction is to reduce the mass of the coal sample without losing representativeness, to meet the needs of the next stage of sample preparation or testing.

[0004] In existing technologies, the crushing, screening, and reduction of coal samples for testing require different equipment, and each step requires manual assistance, which consumes a lot of manpower and time. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an automated rapid sample preparation device for coal quality testing, which can automatically complete the crushing, screening, and reduction steps of coal quality testing and sample preparation with a single device, reducing manpower consumption and improving sample preparation efficiency.

[0006] This utility model provides an automated rapid sample preparation device for coal quality testing, comprising:

[0007] A crusher is used to crush coal samples. The crusher is equipped with a screening drawer at the discharge port, and the bottom of the screening drawer is equipped with screen holes.

[0008] A coal sample reducer is provided, wherein the feed inlet of the reducer is connected to the discharge outlet of the crusher, and the coal sample is reduced after being screened by the screening drawer. A sample retention container is provided below the sample retention outlet of the reducer, and a waste sample container is provided below the waste sample outlet of the reducer.

[0009] Furthermore, the crusher includes a crusher housing, a pair of crushing rollers rotatably installed inside the crusher housing, and a crushing power unit for driving the pair of crushing rollers to rotate in opposite directions. The top of the crusher housing is provided with a feed bin located above the pair of crushing rollers, and the bottom of the crusher housing is provided with a discharge port located below the pair of crushing rollers. The side of the discharge port is provided with a first drawer opening, and the screening drawer can be pushed into or pulled out of the first drawer opening.

[0010] Furthermore, the crushing power unit includes a first motor and two gears. The first motor is connected to one end of any crushing roller, and the two gears mesh with each other and are coaxially fixed to the other ends of the two crushing rollers respectively.

[0011] Furthermore, the reduction machine includes:

[0012] The casing of the separator has a mixing chamber at its upper part, and a feed inlet connected to the discharge port of the crusher at its upper part. The lower part of the mixing chamber is open. The lower part of the separator casing is divided into a sample retention trough and a waste sample retention trough by a middle partition. The sample retention container is placed in the sample retention trough, and the waste sample container is placed in the waste sample retention trough.

[0013] The bottom opening and closing mechanism includes bottom sealing plates for sealing half of the bottom opening of the mixing bin, and opening and closing driving mechanisms for driving the two bottom sealing plates to open or close the bottom opening of the mixing bin. The sample receiving trough and the waste sample receiving trough are located below the bottom opening of the mixing bin corresponding to the two bottom sealing plates.

[0014] A mixing mechanism, comprising a scraper extending radially and adapted within the mixing chamber, and a rotary power unit for driving the scraper to rotate horizontally, wherein the bottom edge of the scraper is provided with scraping teeth.

[0015] Furthermore, one end of the sample receiving trough is provided with a second drawer opening that connects to the outer casing of the splitting machine, and the sample container is a drawer that can be pushed into or pulled out of the second drawer opening;

[0016] One end of the waste sample receiving trough is provided with a third drawer opening that connects to the outer shell of the splitting machine, and the waste sample container is a drawer that can be pushed into or pulled out of the third drawer opening.

[0017] Furthermore, a mounting base is provided on the outside of the mixing chamber, and the outer end of the bottom sealing plate is hinged to the connecting seat of the mounting base through a first hinge shaft;

[0018] The opening and closing drive mechanism is an electric telescopic rod. The upper end of the electric telescopic rod is hinged to the outside of the mixing chamber, and the lower end of the electric telescopic rod is hinged to the mounting base through a second hinge shaft. The second hinge shaft is located diagonally above and to the outside of the first hinge shaft.

[0019] Furthermore, the rotary power unit includes a second motor.

[0020] Furthermore, the hybrid mechanism also includes a lifting push rod, a motor mounting bracket, and a guide frame;

[0021] The lifting push rod is installed on the top of the housing of the reducing machine, with the telescopic shaft of the lifting push rod facing downward and passing through the mixing chamber;

[0022] The motor mounting bracket is fixed to the lower end of the telescopic shaft of the lifting push rod, and the second motor is mounted on the motor mounting bracket with the output shaft of the second motor facing downward and extending out of the motor mounting bracket;

[0023] The guide frame is fixed to the lower end of the output shaft of the second motor. The upper end of the scraper is slidably mounted on the guide frame in a vertical direction. A compression spring is provided between the upper end of the scraper and the guide frame. At least one side of the lower part of the guide frame close to the scraper is provided with a scraper tooth baffle.

[0024] Furthermore, the guide frame is a rectangular frame structure, and the bottom wall of the guide frame has an opening along the center line. There are two scraper baffles, which are respectively close to both sides of the scraper and extend downward from the edges of the opening on both sides.

[0025] The upper end of the scraper extends into the opening and is provided with a support plate adapted to the guide frame. The compression spring is supported between the support plate and the top of the guide frame.

[0026] Furthermore, multiple compression springs are distributed at intervals along the length of the guide frame.

[0027] The beneficial effects of this utility model are reflected in:

[0028] During sample preparation, the original coal sample is fed into a crusher, which crushes the sample. The crushed sample then enters a screening drawer. Small particles that meet the standards pass through the sieve holes of the screening drawer and then enter a reducing machine for further reduction. Samples to be retained are placed in a retention container, while those to be discarded are placed in a waste container. Large particles retained in the screening drawer can be removed for cleaning or the sample can be crushed again. Therefore, this application can automatically complete the crushing, screening, and reducing steps of coal quality testing sample preparation with a single device, reducing manpower consumption and improving sample preparation efficiency compared to existing technologies. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0030] Figure 1 This is an external perspective view of an embodiment of the present utility model;

[0031] Figure 2 This is an internal sectional view of an embodiment of the present utility model;

[0032] Figure 3 for Figure 2 A magnified view of the bottom opening and closing mechanism of the central warehouse;

[0033] Figure 4 for Figure 2 A magnified view of a portion of the hybrid mechanism.

[0034] In the attached diagram, 100-crusher; 110-crusher casing; 111-feed hopper; 112-first drawer opening; 120-crushing roller; 130-first motor; 200-divider; 210-divider casing; 211-mixing hopper; 212-partition; 213-sample receiving trough; 214-discard sample receiving trough; 215-second drawer opening; 216-third drawer opening; 220-hopper bottom opening and closing mechanism; 221- Bottom sealing plate; 222-Electric telescopic rod; 223-Mounting base; 224-Connecting base; 230-Mixing mechanism; 231-Scraper; 2311-Scraper teeth; 2312-Support plate; 232-Second motor; 233-Lifting push rod; 234-Motor mounting bracket; 235-Guide frame; 2351-Scraper tooth baffle; 236-Compression spring; 300-Sieving drawer; 400-Sample retention container; 500-Discard sample container. Detailed Implementation

[0035] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0036] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0037] like Figures 1-4 As shown in the figure, this utility model embodiment provides a coal quality automated rapid sample preparation device, including a crusher 100 and a reducing machine 200.

[0038] The crusher 100 is used to crush coal samples. The discharge port of the crusher 100 is equipped with a screening drawer 300, and the bottom of the screening drawer 300 is equipped with screen holes.

[0039] The feed inlet of the reducing machine 200 is connected to the discharge outlet of the crusher 100, and is used to reduce the coal sample after it has been screened by the screening drawer 300. A sample retention container 400 is provided below the sample retention outlet of the reducing machine 200, and a waste sample container 500 is provided below the waste sample outlet of the reducing machine 200.

[0040] During sample preparation, the original coal sample is fed into the crusher 100, which crushes the sample. The crushed sample then enters the screening drawer 300. Small particles that meet the standards pass through the sieve of the screening drawer 300 and then enter the reducing machine 200 for further reduction. The coal sample to be retained after reduction is placed in the retention container 400, while the sample to be discarded is placed in the discard container 500. For large particles retained in the screening drawer 300, the drawer can be removed for cleaning or the sample can be crushed again. Therefore, this application can automatically complete the crushing, screening, and reducing steps of coal quality testing sample preparation with a single device, reducing manpower consumption and improving sample preparation efficiency compared to existing technologies.

[0041] In some embodiments, refer to Figure 2 The crusher 100 includes a crusher housing 110, a pair of crushing rollers 120 rotatably mounted inside the crusher housing 110, and a crushing power unit for driving the pair of crushing rollers 120 to rotate in opposite directions. The top of the crusher housing 110 is provided with a feed bin 111 located above the pair of crushing rollers 120, and the bottom of the crusher housing 110 is provided with a discharge port located below the pair of crushing rollers 120. The side of the discharge port is provided with a first drawer opening 112, and the screening drawer 300 can be pushed into or pulled out of the first drawer opening 112.

[0042] Specifically, the crushing power unit includes a first motor 130 and two gears. The first motor 130 is connected to one end of any crushing roller 120, and the two gears mesh with each other and are coaxially fixed to the other ends of the two crushing rollers 120 respectively.

[0043] During crushing, the original coal sample is put into the feed hopper 111. The coal sample enters the space between the two crushing rollers 120 from the bottom of the feed hopper 111. The first motor 130 drives the two crushing rollers 120 to rotate in opposite directions. The coal sample is crushed by the two crushing rollers 120 and then enters the screening drawer 300 below. After being screened by the screening drawer 300, it is discharged, thus realizing the crushing and screening of the coal sample.

[0044] In some embodiments, refer to Figures 2-4 The reducing machine 200 includes a reducing machine housing 210, a bin bottom opening and closing mechanism 220, and a mixing mechanism 230.

[0045] The upper part of the casing 210 of the separator is provided with a mixing chamber 211. The upper part of the mixing chamber 211 is provided with a feed inlet connected to the discharge port of the crusher 100. The lower part of the mixing chamber 211 is open. The lower part of the casing 210 of the separator is divided into a sample receiving trough 213 and a waste sample receiving trough 214 by a middle partition 212. The sample container 400 is located in the sample receiving trough 213, and the waste sample container 500 is located in the waste sample receiving trough 214.

[0046] The bottom opening and closing mechanism 220 includes bottom sealing plates 221 for sealing half of the bottom opening of the mixing chamber 211, and opening and closing drive mechanisms for driving the two bottom sealing plates 221 to open or close the bottom opening of the mixing chamber 211. The sample receiving trough 213 and the discard sample receiving trough 214 are located below the bottom opening of the mixing chamber 211 corresponding to the two bottom sealing plates 221.

[0047] Optionally, one end of the sample receiving trough 213 is provided with a second drawer opening 215 connected to the outside of the reducing machine housing 210. The sample holding container 400 is a drawer that can be pushed into or pulled out of the second drawer opening 215, which facilitates the removal of coal samples that need to be retained after reducing. One end of the discard sample receiving trough 214 is provided with a third drawer opening 216 connected to the outside of the reducing machine housing 210. The discard sample container 500 is a drawer that can be pushed into or pulled out of the third drawer opening 216, which facilitates the removal of coal samples that need to be discarded after reducing.

[0048] The mixing mechanism 230 includes a scraper 231 extending radially and adapted to the mixing chamber 211, and a rotary power unit for driving the scraper 231 to rotate horizontally. The rotary power unit is specifically a second motor 232, and the bottom edge of the scraper 231 is provided with scraping teeth 2311.

[0049] Optionally, refer to Figure 3 The mixing chamber 211 is provided with a mounting base 223 on its outer side. The outer end of the bottom sealing plate 221 is hinged to the connecting seat 224 of the mounting base 223 via a first hinge shaft. The opening and closing drive mechanism is an electric telescopic rod 222. The upper end of the electric telescopic rod 222 is hinged to the outside of the mixing chamber 211, and the lower end of the electric telescopic rod 222 is hinged to the mounting base 223 via a second hinge shaft. The second hinge shaft is located diagonally above and to the outside of the first hinge shaft. In this way, the bottom sealing plate 221 can be opened and closed by controlling the extension and retraction of the electric telescopic rod 222.

[0050] During the reduction process, the coal sample crushed and screened by the crusher 100 directly enters the mixing chamber 211. The second motor 232 drives the scraper 231 to rotate. The scraper teeth 2311 on the bottom edge of the scraper 231 stir and mix the coal sample at the bottom of the mixing chamber 211 evenly and spread it out. After completion, the scraper 231 stops at the boundary between the two halves of the bottom plate, and then drives the bottom sealing plate 221 above the waste sample receiving trough 214 to open. The coal sample above the waste sample receiving trough 214 falls into the waste sample container 500 below, completing the reduction by 1 / 2. When a reduction of 1 / 4 is required, the bottom sealing plate 221 above the waste sample receiving trough 214 is driven to close, and the above operation is repeated. In this way, the reduction of 1 / 8, 1 / 16, etc. can be completed. After the reduction is completed, the bottom plate above the retention container 400 is opened, and the coal sample to be retained falls into the retention container 400. In this way, multiple reductions can be completed at one time without manual operation.

[0051] As a further improvement to the above scheme, referring to Figure 4 The mixing mechanism 230 also includes a lifting push rod 233, a motor mounting bracket 234, and a guide frame 235. The lifting push rod 233 is installed on the top of the separator housing 210, with its telescopic shaft pointing downwards and extending into the mixing chamber 211. The motor mounting bracket 234 is fixed to the lower end of the telescopic shaft of the lifting push rod 233. A second motor 232 is mounted on the motor mounting bracket 234, with its output shaft pointing downwards and extending out of the motor mounting bracket 234. The guide frame 235 is fixed to the lower end of the output shaft of the second motor 232. The upper end of the scraper 231 is slidably mounted vertically on the guide frame 235. A compression spring 236 is provided between the upper end of the scraper 231 and the guide frame 235. A scraper tooth baffle 2351 is provided on at least one side of the lower part of the guide frame 235 close to the scraper 231.

[0052] As a preferred structure, the guide frame 235 is a rectangular frame structure. The bottom wall of the guide frame 235 has an opening along the center line. Two scraper baffles 2351 are provided, which are respectively close to the two sides of the scraper 231 and extend downward from the edges of the opening on both sides. The upper end of the scraper 231 extends into the opening and is provided with a support plate 2312 adapted to the guide frame 235. A compression spring 236 is supported between the support plate 2312 and the top of the guide frame 235.

[0053] In this embodiment, multiple compression springs 236 are distributed at intervals along the length of the guide frame 235, which can improve the stability of the scraper 231.

[0054] When the drive scraper 231 stirs and scrapes the coal sample at the bottom of the mixing chamber 211, the scraper tooth baffles 2351 on both sides expose the scraper teeth 2311. When it is necessary to open the bottom sealing plate 221 on one side to discharge the coal sample, the scraper 231 is first stopped at the boundary between the two halves of the bottom plate. Then, the lifting push rod 233 drives the guide frame 235 to press down, and the compression spring 236 is compressed. The scraper tooth baffles 2351 on both sides of the guide frame 235 cover the scraper teeth 2311. This can prevent the coal sample on the other side from being discharged, ensuring that the amount of coal sample discharged each time is equal to the amount of coal sample remaining. After the coal sample is discharged, the lifting push rod 233 drives the guide frame 235 to return to its original position. The guide frame 235 returns to its original position under the action of the compression spring 236, and the scraper teeth 2311 at the lower end of the scraper 231 are exposed again. Then, the remaining coal sample in the mixing chamber 211 can continue to be stirred.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A rapid sample preparation device for automated coal quality testing, characterized in that, include: A crusher is used to crush coal samples. The crusher is equipped with a screening drawer at the discharge port, and the bottom of the screening drawer is equipped with screen holes. A coal sample reducer is provided, wherein the feed inlet of the reducer is connected to the discharge outlet of the crusher, and the coal sample is reduced after being screened by the screening drawer. A sample retention container is provided below the sample retention outlet of the reducer, and a waste sample container is provided below the waste sample outlet of the reducer.

2. The automated rapid sample preparation device for coal quality testing according to claim 1, characterized in that, The crusher includes a crusher housing, a pair of crushing rollers rotatably installed inside the crusher housing, and a crushing power unit for driving the pair of crushing rollers to rotate in opposite directions. The top of the crusher housing is provided with a feed hopper located above the pair of crushing rollers, and the bottom of the crusher housing is provided with a discharge port located below the pair of crushing rollers. The side of the discharge port is provided with a first drawer opening, and the screening drawer can be pushed into or pulled out of the first drawer opening.

3. The automated rapid sample preparation device for coal quality testing according to claim 2, characterized in that, The crushing power unit includes a first motor and two gears. The first motor is connected to one end of any crushing roller, and the two gears mesh with each other and are coaxially fixed to the other ends of the two crushing rollers respectively.

4. The automated rapid sample preparation device for coal quality testing according to claim 1, characterized in that, The reduction machine includes: The casing of the separator has a mixing chamber at its upper part, and a feed inlet connected to the discharge port of the crusher at its upper part. The lower part of the mixing chamber is open. The lower part of the separator casing is divided into a sample retention trough and a waste sample retention trough by a middle partition. The sample retention container is placed in the sample retention trough, and the waste sample container is placed in the waste sample retention trough. The bottom opening and closing mechanism includes bottom sealing plates for sealing half of the bottom opening of the mixing bin, and opening and closing driving mechanisms for driving the two bottom sealing plates to open or close the bottom opening of the mixing bin. The sample receiving trough and the waste sample receiving trough are located below the bottom opening of the mixing bin corresponding to the two bottom sealing plates. A mixing mechanism, comprising a scraper extending radially and adapted within the mixing chamber, and a rotary power unit for driving the scraper to rotate horizontally, wherein the bottom edge of the scraper is provided with scraping teeth.

5. The automated rapid sample preparation device for coal quality testing according to claim 4, characterized in that, One end of the sample receiving trough is provided with a second drawer opening that connects to the outer shell of the splitting machine, and the sample container is a drawer that can be pushed into or pulled out of the second drawer opening; One end of the waste sample receiving trough is provided with a third drawer opening that connects to the outer shell of the splitting machine, and the waste sample container is a drawer that can be pushed into or pulled out of the third drawer opening.

6. The automated rapid sample preparation device for coal quality testing according to claim 4, characterized in that, The mixing chamber is provided with a mounting base on its outer side, and the outer end of the bottom sealing plate is hinged to the connecting seat of the mounting base through a first hinge shaft; The opening and closing drive mechanism is an electric telescopic rod. The upper end of the electric telescopic rod is hinged to the outside of the mixing chamber, and the lower end of the electric telescopic rod is hinged to the mounting base through a second hinge shaft. The second hinge shaft is located diagonally above and to the outside of the first hinge shaft.

7. The automated rapid sample preparation device for coal quality testing according to claim 4, characterized in that, The rotary power unit includes a second motor.

8. The automated rapid sample preparation device for coal quality testing according to claim 7, characterized in that, The hybrid mechanism also includes a lifting push rod, a motor mounting bracket, and a guide frame; The lifting push rod is installed on the top of the housing of the reducing machine, with the telescopic shaft of the lifting push rod facing downward and passing through the mixing chamber; The motor mounting bracket is fixed to the lower end of the telescopic shaft of the lifting push rod, and the second motor is mounted on the motor mounting bracket with the output shaft of the second motor facing downward and extending out of the motor mounting bracket; The guide frame is fixed to the lower end of the output shaft of the second motor. The upper end of the scraper is slidably mounted on the guide frame in a vertical direction. A compression spring is provided between the upper end of the scraper and the guide frame. At least one side of the lower part of the guide frame close to the scraper is provided with a scraper tooth baffle.

9. The automated rapid sample preparation device for coal quality testing according to claim 8, characterized in that, The guide frame is a rectangular frame structure. The bottom wall of the guide frame has an opening along the center line. There are two scraper baffles. The two scraper baffles are respectively close to the two sides of the scraper and extend downward from the edges of the opening on both sides. The upper end of the scraper extends into the opening and is provided with a support plate adapted to the guide frame. The compression spring is supported between the support plate and the top of the guide frame.

10. The automated rapid sample preparation device for coal quality testing according to claim 9, characterized in that, The compression springs are distributed at intervals along the length of the guide frame.

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