A chain type sample divider and a sampling method

Abstract

The present invention discloses a chain-type sample divider, which comprises a frame, a driving shaft assembly and a driven shaft assembly rotatably connected to both ends of the frame in the length direction, and a driving assembly connected to and used for driving the driving shaft assembly to rotate; the driving shaft assembly and the driven shaft assembly are arranged in parallel, and a transmission chain for drivingly connecting the two is provided on the driving shaft assembly and the driven shaft assembly; a feeding hopper is fixedly connected to the top of the frame, and the transmission chain is provided with a first chain bucket and a second chain bucket for receiving the scattered materials from the feeding hopper, the first chain bucket and the adjacent second chain bucket are arranged at a preset interval, and the opening directions of the first chain bucket and the second chain bucket are opposite. The present invention also provides a sample dividing method. The above chain-type sample divider can divide two samples at one time, which is convenient for controlling the sample dividing ratio and improving the service life of the chain-type sample divider.

Description

Technical Field

[0001] The present invention relates to the technical field of sample reduction equipment, and particularly relates to a chain type sample divider. The present invention also relates to a sample reduction method applied to the above-mentioned chain type sample divider. Background Art

[0002] Sample reduction is a sample preparation process of dividing a sample into several representative and separated parts, and is a method of reducing the mass under the condition that the sample particle size remains unchanged. A sample divider is a device that cuts sub-samples from a material flow using a cutter.

[0003] In the automatic sample preparation process, in more and more cases, it is required that the sample divider divides more than two sub-samples in one sample reduction process. At the same time, it is required that the overall height of the sample divider be as low as possible, there is no particle segregation during the sample reduction process, the sample reduction ratio can be adjusted for samples with different masses, the distance distribution between sub-samples is relatively far, and it is convenient for the overall layout. Although the existing sample divider can obtain two retained samples through reciprocating motion, the operating conditions are complex, which affects the service life of the driving mechanism.

[0004] Therefore, how to improve the service life of the sample divider, realize dividing two samples in one time and control the sample reduction ratio has become a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a chain type sample divider that can divide two samples in one time. Another purpose of the present invention is to provide a sample reduction method applied to the chain type sample divider.

[0006] To achieve the above purpose, the present invention provides a chain type sample divider, including a frame, a driving shaft assembly and a driven shaft assembly rotatably connected to both ends of the frame in the length direction, and a driving assembly connected to and used to drive the driving shaft assembly to rotate;

[0007] The driving shaft assembly and the driven shaft assembly are arranged in parallel, and a transmission chain for drivingly connecting the two is provided on the driving shaft assembly and the driven shaft assembly;

[0008] A feed hopper is fixedly connected to the top of the frame, and the transmission chain is provided with a first chain bucket and a second chain bucket for receiving the scattered material from the feed hopper. The first chain bucket and the adjacent second chain bucket are arranged at a preset distance, and the opening directions of the first chain bucket and the second chain bucket are opposite.

[0009] Optionally, the transmission chain is provided with an attachment plate for fixing the first chain bucket and the second chain bucket, and the first chain bucket and the second chain bucket are detachably connected to the transmission chain through the attachment plate.

[0010] Optionally, the driving assembly includes a driving motor and a speed reducer connecting the driving motor and the driving shaft assembly.

[0011] Optionally, when the first chain bucket runs above the driving shaft assembly and the driven shaft assembly, the opening of the first chain bucket is arranged downward.

[0012] Optionally, the driven shaft assembly includes a driven shaft, a mounting sleeve, a shaft sleeve, a dust-proof cover plate, and a sprocket arranged in sequence from both ends of the driven shaft sleeve to the middle; wherein the sprocket is used for cooperating with the transmission chain, and an intermediate sleeve is arranged on the outer periphery of the driven shaft between the sprockets.

[0013] Optionally, a first sample retention bin is arranged below the driven shaft assembly, a second sample retention bin is arranged below the driving shaft assembly, and a rejected sample bin is arranged below the feed hopper.

[0014] The present invention also provides a splitting method applied to the above-mentioned chain splitting device; defining the time for the transmission chain to run one week as a cycle period, and the time for the first chain bucket and the second chain bucket to cut and drop materials when passing below the feed hopper as the effective cutting time;

[0015] Adjust the ratio of the effective cutting and dropping time to the cycle period.

[0016] Optionally, the driving assembly rotates at a constant speed when the first chain bucket and the second chain bucket cut the discharge hopper, and adjusts the rotation speed of the driving assembly when running below the feed hopper in the non-cutting area of the transmission chain to change the cycle period; wherein, the non-cutting area refers to the area of the transmission chain between the first chain bucket and the second chain bucket where falling materials cannot be received.

[0017] Optionally, the driving assembly rotates at a constant speed, and adjusts the number or width of the first chain bucket and the second chain bucket.

[0018] Compared with the above background art, the chain-type splitter provided by the present invention drives the driving shaft assembly and the driven shaft assembly to rotate relative to the frame through a driving member. The driving shaft assembly and the driven shaft assembly are arranged in parallel. A transmission chain is arranged between the driving shaft assembly and the driven shaft assembly, and a second chain bucket and a second chain bucket for receiving the falling material are arranged on the transmission chain. When the feeding hopper fixed on the frame discharges the material, the driving shaft assembly drives the driven shaft assembly to rotate through the transmission chain; since the openings of the first chain bucket and the second chain bucket are arranged in the opposite direction to the transmission chain, when the part of the transmission chain fixing the second chain bucket is above the driving shaft assembly to receive the material, the part of the transmission chain fixing the first chain bucket will be below the driving shaft assembly to receive the material. When the materials received by the first chain bucket and the second chain bucket respectively run to both ends in the length direction of the frame, the openings of the chain buckets are reversed downward to realize unloading. When the transmission chain rotates one week in one direction, both the first chain bucket and the second chain bucket complete one-time splitting and sample retention, and two samples can be obtained at one time; the sample retention amount can be adjusted by setting a certain number and opening width of the first chain bucket and the second chain bucket. The above chain-type splitter has the openings of the first chain bucket and the second chain bucket arranged in the opposite direction, so that the driving assembly can complete obtaining two samples at one time by rotating in one direction, avoiding the reciprocating operation of the driving assembly, thereby improving the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0020] Figure 1 Schematic diagram of the chain-type splitter provided by the embodiment of the present invention;

[0021] Figure 2 Schematic diagram of the first state of the chain-type splitter provided by the embodiment of the present invention;

[0022] Figure 3 Schematic diagram of the second state of the chain-type splitter provided by the embodiment of the present invention;

[0023] Figure 4 is Figure 1 Schematic diagram of the driven shaft assembly in

[0024] Wherein:

[0025] 1 - Frame, 2 - Driving shaft assembly, 3 - Driven shaft assembly, 4 - Driving component, 5 - Transmission chain, 6 - Feeding hopper, 7 - First chain bucket, 8 - Second chain bucket, 9 - Attachment plate, 10 - Driven shaft, 11 - Mounting sleeve, 12 - Bush, 13 - Dust-proof cover plate, 14 - Sprocket, 15 - Intermediate sleeve, 16 - First sample storage bin, 17 - Second sample storage bin, 18 - Rejected sample bin. Detailed implementation manner

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] In order to enable those skilled in the art of this technology to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0028] Please refer to Figures 1 to 4 , Figure 1 , which is a schematic diagram of the chain type splitter provided by the embodiment of the present invention. Figure 2 , which is a schematic diagram of the first state of the chain type splitter provided by the embodiment of the present invention. Figure 3 , which is a schematic diagram of the second state of the chain type splitter provided by the embodiment of the present invention. Figure 4 For Figure 1 , it is a schematic diagram of the driven shaft assembly in

[0029] The chain type splitter provided by the present invention includes a frame 1, a driving shaft assembly 2, a driven shaft assembly 3, a driving component 4, a transmission chain 5, etc. The driving shaft assembly 2 and the driven shaft assembly 3 are arranged in parallel. The driving component 4 is used to drive the driving shaft assembly 2 to rotate and drive the driven shaft assembly 3 to rotate through the transmission chain 5.

[0030] In order to realize the splitting of the sample, a feeding hopper 6 is arranged above the transmission chain 5 on the frame 1, and the feeding hopper 6 is provided with a discharge port for discharging materials; a first chain bucket 7 and a second chain bucket 8 for receiving the discharged materials are arranged on the transmission chain 5. When the feeding hopper 6 fixed on the frame 1 discharges materials, the driving shaft assembly 2 drives the driven shaft assembly 3 to rotate through the transmission chain 5; since the openings of the first chain bucket 7 and the second chain bucket 8 are oppositely arranged in the reverse direction of the transmission chain 5, when the part of the transmission chain 5 fixing the second chain bucket 8 is above the driving shaft assembly 2 to receive materials, the part of the transmission chain 5 fixing the first chain bucket 7 will be below the driving shaft assembly 2 to receive materials. When the materials received by the first chain bucket 7 and the second chain bucket 8 respectively run to both ends in the length direction of the frame 1, the openings of the chain buckets are reversed downward to realize the unloading of the split samples.

[0031] When the drive chain 5 rotates one-way for a week, when the hopper openings of the first hopper 7 and the second hopper 8 pass through the blanking with the hopper openings facing upward, one-time sample reduction and retention are completed for both, and two samples can be obtained at a single time. The sample retention amount can be adjusted by setting a certain number and opening width of the first hopper 7 and the second hopper 8. By setting the hopper openings of the first hopper 7 and the second hopper 8 in opposite directions, the above-mentioned chain type sample divider can complete obtaining two samples at a single time at different positions of the drive chain 5 when the drive assembly 4 rotates one-way, avoiding the reciprocating operation of the drive assembly 4, thereby improving the service life.

[0032] The following will introduce the chain type sample divider provided by the present invention in more detail in conjunction with the drawings and specific embodiments.

[0033] In the specific embodiment provided by the present invention, the frame 1 adopts a cabin-shaped shell as shown in Figure 1 The driving shaft assembly 2 and the driven shaft assembly 3 are arranged at both ends in the length direction of the frame 1, and the driving shaft assembly 2 and the driven shaft assembly 3 are arranged in parallel and are fixedly arranged in the frame 1 along the width direction of the frame 1. The drive assembly 4 is fixedly connected to one side of the frame 1, and its main function is to drive the driving shaft assembly 2 to rotate, and the driving shaft assembly 2 drives the driven shaft assembly 3 to rotate through the drive chain 5.

[0034] In this embodiment, two drive chains 5 are adopted. Sprockets 14 cooperating with the drive chains 5 are arranged at both ends in the length direction of the driving shaft assembly 2 and the driven shaft assembly 3. The first hopper 7 and the second hopper 8 are fixedly connected to the drive chain 5, and the hopper openings of the first hopper 7 and the second hopper 8 are arranged in opposite directions. The purpose of adopting two drive chains 5 is to facilitate fixing the first hopper 7 and the second hopper 8, so that the first chain and the second chain can follow the drive chain 5 to move and are used to receive materials. In specific implementation, more drive chains 5 can also be adopted according to needs.

[0035] The frame 1 is fixedly connected with a feeding hopper 6 above the drive chain 5. A discharge port is opened on one side of the feeding hopper 6, and blanking is carried out through the discharge port. The first hopper 7 and the second hopper 8 are used to receive materials for sample retention when the hopper openings pass through under the feeding hopper 6 with the hopper openings facing upward, and unload the samples when the hopper openings face downward during the rotation following the drive chain 5.

[0036] The reverse setting of the openings of the first bucket 7 and the second bucket 8 specifically means that when the first bucket 7 follows the drive chain 5 and passes above the drive shaft assembly 2 through the feed hopper 6 with the opening of the bucket of the first bucket 7 facing downward, when the second bucket 8 follows the drive chain 5 and passes above the drive shaft assembly 2, the opening of the second bucket 8 is upward. The first bucket 7 will follow the drive chain 5 and run below the drive shaft assembly 2 with the bucket opening upward, and cut and retain samples during the blanking of the first bucket 7 passing through the feed hopper 6. The second bucket 8 will only cut and retain samples when it follows the drive chain 5 and passes above the drive shaft assembly 2 and passes below the feed hopper 6.

[0037] In this way, the first bucket 7 and the second bucket 8 achieve sample reduction and retention at different positions, and complete two times of sample reduction and retention when the drive chain 5 rotates one week in one direction. Only the appropriate width and quantity of the first bucket 7 and the second bucket 8 need to be set according to the sample reduction quality requirements. It should be noted that the first bucket 7 and the second bucket 8 are arranged at a preset interval, and the preset interval can ensure that the first bucket 7 and the second bucket 8 do not interfere with each other when they respectively run below the discharge port of the feed hopper 6, that is, they do not cut and retain samples simultaneously.

[0038] In the specific embodiment provided by the present invention, the first bucket 7 and the second bucket 8 are detachably connected to the drive chain 5, so as to facilitate replacing the first bucket 7 and the second bucket 8 with different specifications and quantities according to different sample reduction requirements, and adjusting the interval between adjacent buckets. Specifically, the drive chain 5 can adopt a chain with an attachment plate 9; the attachment plate 9 is in the shape of an angle steel sheet, and screw holes are opened on two adjacent sides. The chain with an attachment plate 9 means that the attachment plate 9 is fixedly connected to the chain through the screw holes on one side, and the screw holes on the other side are used for bolt cooperation to realize the detachable connection of the first bucket 7 and even the second bucket 8.

[0039] The main function of the drive assembly 4 is to drive the drive shaft assembly 2 to rotate, thereby driving the first bucket 7 and the second bucket 8 to run along with the drive chain 5, realizing cutting and blanking, and completing sample reduction and retention. The drive assembly 4 can be connected to the drive shaft assembly 2 in the form of a drive motor combined with a speed reducer according to needs, which is convenient for speed regulation.

[0040] In order to facilitate the collection and acquisition of the sample reduction and retention, a first sample retention bin 16 and a second sample retention bin 17 are respectively provided below the drive shaft assembly 2 and the driven shaft assembly 3 on the frame 1. For example, when the drive shaft assembly 2 is arranged on the first side of the frame 1 (for reference Figure 1On the left side shown, the driven shaft assembly 3 is arranged on the second side of the frame 1. The drive chain 5 rotates counterclockwise from the second side to the first side of the frame 1. When the first chain bucket 7 passes above the drive shaft assembly 2 with the bucket opening downward, the first chain bucket 7 follows the drive chain 5 and passes below the drive shaft assembly 2 with the opening upward, cutting, dropping, reducing, and retaining samples. When passing above the driven shaft assembly 3, the bucket opening faces downward to unload the reduced and retained samples. At this time, the first sample storage bin 16 is arranged below the driven shaft assembly 3. Correspondingly, the second sample storage bin 17 is arranged below the drive shaft assembly 2. There is a waste sample bin 18 between the first sample storage bin 16 and the second sample storage bin 17. The waste sample bin 18 is located below the feed hopper 6 to collect the dropped materials from the feed hopper 6.

[0041] Since the first chain bucket 7 or the second chain bucket 8 needs to unload the reduced and retained samples when the opening faces downward, the materials will inevitably fall on the driven shaft assembly 3. To clean the material residues on the driven shaft assembly 3, please further refer to Figure 4 for a more detailed description taking the driven shaft assembly 3 as an example.

[0042] The driven shaft assembly 3 includes a driven shaft 10. At both ends in the length direction of the driven shaft 10, there are sprockets 14 for cooperating with the chain. The sprockets 14 are arranged inside the frame 1, and there are roller bearings between the sprockets 14 and the driven shaft 10. To prevent materials from entering the roller bearings, dust-proof covers 13 can be arranged on one side of the sprocket 14 in contact with the frame 1 or on both sides of the sprocket 14. A cylindrical knife-shaped intermediate sleeve 15 is arranged on the driven shaft 10 for protection to prevent the residues on the shaft when the bucket dumps; there is a bushing 12 at the place where the driven shaft 10 passes through the frame 1. An installation sleeve 11 is arranged on the outer periphery of the bushing 12. The combination of the bushing 12 and the installation sleeve 11 plays the role of positioning the bearing and is convenient for disassembly. In other words, from both ends to the middle of the driven shaft assembly 3 are the installation sleeve 11, the bushing 12, the dust-proof cover 13, and the sprocket 14 in sequence. An intermediate sleeve 15 is arranged on the outer periphery of the driven shaft 10 between the two relatively arranged sprockets 14 to prevent materials from remaining on the driven shaft 10 when dumping.

[0043] The present invention also provides a reduction method applied to the above-mentioned chain type reducer. This reduction method is mainly achieved by adjusting the ratio of the effective cutting and dropping time to the cycle period.

[0044] According to the amount of materials to be retained for the first sub-sample and the second sub-sample, a number of first chain buckets 7 and second chain buckets 8 are fixed on the drive sprocket 14. The drive assembly 4 makes a cyclic one-way movement, thereby driving the first chain buckets 7 and the second chain buckets 8 to cut and drop materials cyclically, realizing the actions of receiving materials and dumping materials, and thus two coal samples can be obtained.

[0045] The chain bucket (including the first chain bucket 7 and the second chain bucket 8) cuts the material such as coal flow at a fixed speed, the number of chain buckets and the opening width are fixed values, and under the premise of uniform and continuous coal flow, the ratio of the chain bucket cutting coal flow time, i.e. the effective cutting and dropping time, to the time of one cycle of the transmission chain 5, i.e. the cycle period, is the reduction ratio. After setting the running speed, the reduction ratio can be adjusted by changing the single cycle time, thereby achieving the fixed quality reduction target.

[0046] As the quality of the incoming sample changes, in order to achieve fixed mass reduction, the reduction ratio must be changed (the mass of the first sub-sample retained / the mass of the incoming sample = the time for the first chain bucket 7 to cut the coal flow / the cycle period). After the chain reducer is assembled, the length of its transmission chain 5 is usually a fixed value, and the cutting coal flow is set to a fixed speed, that is, the effective cutting and blanking time is determined. In order to achieve the adjustment of the reduction ratio, it is necessary to adjust the cycle period in disguise.

[0047] In the specific implementation provided by the present invention, there are two main methods for adjusting the length of the cycle: on the one hand, the cycle running time can be adjusted by staying in the non-cutting area; on the other hand, it can be adjusted by adjusting the running speed of the drive assembly 4 to change the speed of the non-cutting area. The non-cutting area specifically refers to the area of ​​the transmission chain 5 where the chain bucket does not cut the material (excluding the gaps between adjacent multiple first chain buckets 7 and the gaps between adjacent multiple second chain buckets 8). Constant mass reduction is achieved by increasing or decreasing the cycle period and changing the reduction ratio.

[0048] In another specific embodiment provided by the present invention, the effective cutting time can also be adjusted. Since the first chain bucket 7 and the second chain bucket 8 and the transmission chain 5 provided by the present invention are all detachably connected, the length of the cutting area can be changed by replacing the first chain bucket 7 or the second chain bucket 8 of different widths, and the number of the first chain bucket 7 and the second bucket can be increased or decreased. When the running speed of the transmission chain 5 remains unchanged, the length of the cutting area changes, and the effective cutting time of the first chain bucket 7 and the second chain bucket 8 changes, which leads to a corresponding change in the reduction ratio of the first sub-sample and the second sub-sample to meet different fixed mass reduction requirements.

[0049] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0050] The above has introduced in detail the chain-type sample divider and the sample dividing method provided by the present invention. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A chain type splitter, characterized in that, It includes a frame (1), a driving shaft assembly (2) and a driven shaft assembly (3) rotatably connected to both ends of the frame (1) in the length direction, and a driving assembly (4) connected and used to drive the driving shaft assembly (2) to rotate; The driving shaft assembly (2) and the driven shaft assembly (3) are arranged in parallel, and a transmission chain (5) for drivingly connecting the two is provided on the driving shaft assembly (2) and the driven shaft assembly (3); A feeding hopper (6) is fixedly connected to the top of the frame (1). The transmission chain (5) is provided with a first chain bucket (7) and a second chain bucket (8) for receiving the scattered materials from the feeding hopper (6). The first chain bucket (7) and the adjacent second chain bucket (8) are arranged at a preset interval, and the opening directions of the first chain bucket (7) and the second chain bucket (8) are opposite; The driving assembly (4) performs a one-way circular motion. When the materials received by the first chain bucket and the second chain bucket reach both ends of the frame in the length direction respectively, the openings of the chain buckets are reversed downward to realize sample retention unloading; The driven shaft assembly (3) includes a driven shaft (10). At both ends of the driven shaft (10) in the length direction, there are sprockets (14) used for cooperating with the chain. Among them, the sprockets (14) are used for cooperating with the transmission chain (5), and an intermediate sleeve (15) is arranged on the outer periphery of the driven shaft (10) between the sprockets (14).

2. The chain type splitter according to claim 1, characterized in that, The transmission chain (5) is provided with an attachment plate (9) for fixing the first chain bucket (7) and the second chain bucket (8). The first chain bucket (7) and the second chain bucket (8) are detachably connected to the transmission chain (5) through the attachment plate (9).

3. The chain type splitter according to claim 2, characterized in that, The driving assembly (4) includes a driving motor and a speed reducer connecting the driving motor and the driving shaft assembly (2).

4. The chain type splitter according to claim 3, characterized in that, When the first chain bucket (7) runs above the driving shaft assembly (2) and the driven shaft assembly (3), the opening of the first chain bucket (7) is arranged downward.

5. The chain type splitter according to any one of claims 1 to 4, characterized in that, A first sample retention bin (16) is arranged below the driven shaft assembly (3), a second sample retention bin (17) is arranged below the driving shaft assembly (2), and a waste sample bin (18) is arranged below the feeding hopper (6).

6. A splitting method applied to the chain type splitter according to claim 1, characterized in that, Define the time for the transmission chain (5) to run one week as a cycle period, and the time for the first chain bucket (7) and the second chain bucket (8) to cut and drop materials when passing below the feeding hopper (6) as the effective cutting and dropping time; Adjust the ratio of the effective cutting and dropping time to the cycle period.

7. The splitting method according to claim 6, characterized in that, The driving assembly (4) rotates at a constant speed when the first chain bucket (7) and the second chain bucket (8) cut the discharge hopper, and adjust the rotation speed of the driving assembly (4) when running below the feeding hopper (6) in the non-cutting area of the transmission chain (5) to change the cycle period; wherein, the non-cutting area refers to the area between the first chain bucket (7) and the second chain bucket (8) of the transmission chain (5) where materials cannot be received.

8. The splitting method according to claim 7, characterized in that, The driving assembly (4) rotates at a constant speed, and adjust the number or width of the first chain bucket (7) and the second chain bucket (8).

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