High-uniformity quantitative splitting and sub-packaging process for coal standard sample
By setting up a cleaning mechanism in the shrink-segment dividing device, the problem of wet coal samples sticking to the inner wall of the hopper is solved, ensuring the normal use of the equipment and the smooth progress of detection and analysis.
Patent Information
- Application Number
- CN202411441191.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-03-04
AI Technical Summary
In the existing coal standard sample testing, wet coal samples are prone to stick to the inner wall of the division hopper, affecting the normal use and detection and analysis of the shrink-segment dividing device.
A high-uniform quantitative shrinkage and partitioning process for coal standard samples was designed. By setting up a cleaning mechanism in the shrinkage and partitioning divider, a motor drives a bidirectional threaded rod to drive the cleaning plate to clean the inner wall of the divider to ensure the cleaning of the inner wall of the divider.
It effectively avoids the problem of wet coal samples sticking to the inner wall of the hopper, ensuring the normal use of the shrink-segment dividing device and the smooth progress of coal samples detection and analysis.
Smart Images
Figure CN119555472A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of coal detection, and in particular to a high-uniformity quantitative shrinking and packaging process for a coal standard sample. Background Art
[0002] In coal inspection, usually only repeatability and reproducibility are specified for the test results, that is, clear provisions are made for precision. However, in order to provide reliable coal quality test results, not only precision but also accuracy should be tested. Coal standard samples are one of the most commonly used methods for testing accuracy. Especially under market economy conditions, coal standard materials will play a special "measuring tool" role. Regularly using coal standard samples to calibrate instruments and using coal standard samples to evaluate test data can find out whether the results of a certain characteristic indicator measured by the laboratory are in a normal state, which guarantees the accurate measurement of coal quality.
[0003] The splitter is very important in the detection of coal standard samples because it can ensure the representativeness and precision of the samples, thereby improving the accuracy and reliability of the test results. The splitter is a device specially used for splitting coal or other particulate materials. Its design and use strictly follow the relevant standards and methods to ensure the accuracy and consistency of the results.
[0004] The structure of the shrinking and dividing device in the prior art is simple, and is usually composed of two alternately and symmetrically arranged dividing hoppers fixed at the bottom of a feed trough, and a collecting frame is arranged at the bottom. When the humidity of the coal sample is high, the coal sample is prone to stick to the inner wall of the dividing hopper, which affects the normal use of the shrinking and dividing device and the detection and analysis of the coal sample. Therefore, it is necessary to improve the design of the shrinking and dividing device in the related technology. Summary of the invention
[0005] In order to solve the above problems, the present invention provides a high-uniformity quantitative shrinking and packaging process for coal standard samples.
[0006] The above technical purpose of the present invention is achieved through the following technical scheme: a high uniformity quantitative shrinking and packaging process for coal standard samples, comprising the following steps:
[0007] S1. Select a suitable splitter according to the nominal maximum particle size of the coal sample to be split, use a dustpan to pour the split coal sample from the feed trough into the splitting hopper, and swing it back and forth along the width direction of the splitter to make the coal sample pass through the splitter more evenly;
[0008] Among them, a cleaning mechanism for cleaning the residual coal in the dividing hopper is provided in the reducing and dividing device;
[0009] S2. Take a coal sample from any side, clean the residual coal in the dividing hopper through the cleaning mechanism, and continue to reduce the coal sample again using the steps in S1, retaining samples alternately, and after multiple reductions, the obtained samples are packaged into sample bottles.
[0010] By adopting the above technical solution, the coal sample can be quantitatively reduced by the reduction divider, which belongs to the conventional technology in the prior art and does not need to be elaborated here. In order to avoid the situation where the wet coal sticks to the inner wall of the divider hopper and affects the normal use of the reducer, the staff can use the cleaning mechanism to clean the residual coal on the inner wall of the divider hopper after one reduction, which ensures the normal use of the reducer and the smooth progress of the coal sample detection and analysis.
[0011] Furthermore, the shrinking divider includes a base, a support rod fixed to the top of the base, a feed trough fixed to the top of the support rod, a first dividing hopper fixed and connected to the bottom of the feed trough, and a second dividing hopper fixed and connected to the bottom of the feed trough. The first dividing hoppers and the second dividing hoppers are alternately arranged in plurality and symmetrically distributed on both sides of the feed trough. The top of the base is provided with a first collecting frame for receiving the discharge of the plurality of first dividing hoppers and a second collecting frame for receiving the discharge of the second dividing hopper.
[0012] Furthermore, four fixing plates are fixed on the top of the feed trough and are distributed in a rectangular array at the four corners of the feed trough. The cleaning mechanism includes a mounting and power assembly, a first cleaning assembly for cleaning the inner wall of the first distribution hopper, and a second cleaning assembly for cleaning the inner wall of the second distribution hopper.
[0013] The cam is an assembly made up of two parts, each of which is for mounting a plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of plurality of
[0014] Furthermore, the first cleaning assembly includes a cross bar fixed on the side wall of the first mounting plate close to the second mounting plate, a cleaning plate rotatably mounted on the cross bar, and a limit plate fixed to the bottom of the cross bar and vertically arranged, the limit plate is located on the side of the first mounting plate close to the second mounting plate, the side walls on both sides of the cleaning plate are respectively pressed against the inner walls on both sides of the first distribution hopper, a rotating shaft fixed to the cleaning plate is penetrated through the cleaning plate near its upper end, an end plate is fixed to the end of the rotating shaft, a torsion spring fixed between the end plate and the cross bar is sleeved on the rotating shaft, the cleaning plate is pressed against the side wall of the limit plate under the action of the torsion spring, and a clearance groove is provided at the position corresponding to the second mounting plate and the cross bar.
[0015] By adopting the above technical scheme, the motor drives the bidirectional threaded rod to rotate after working. Since the bidirectional threaded rod is threadedly connected to the first mounting plate and the second mounting plate, the first mounting plate and the second mounting plate are symmetrically distributed on the two sections of the thread of the bidirectional threaded rod, and the guide rod is slidably matched with the first mounting plate and the second mounting plate, so that the first mounting plate and the second mounting plate are close to each other, thereby driving the cross bar on the first mounting plate to move toward the side close to the second mounting plate, and the cleaning plate moves synchronously with the cross bar, so as to scrape off the wet coal stuck on the inner walls of both sides of the first dividing hopper. When the side wall of the cleaning plate is close to the bottom of the inclined surface of the first dividing hopper, as the first mounting plate continues to move, the cleaning plate rotates around the rotating shaft, and the torsion spring produces adaptive deformation, so that the cleaning plate cleans the part of the inner wall of the first dividing hopper close to the inclined surface of the first dividing hopper, thereby ensuring the cleanliness of the inner wall of the first dividing hopper, which is beneficial to the normal use of the reduction divider.
[0016] Furthermore, a limit block with a right-angled trapezoidal cross section is fixed to the bottom of the cross bar, the inclined surface of the limit block is parallel to the inclined surface of the first material distribution hopper, and the limit block is located on the side of the cleaning plate away from the second mounting plate.
[0017] By adopting the above technical solution, the flashed coal sample can smoothly enter the first sub-hopper or the second sub-hopper.
[0018] Furthermore, a mounting column is fixed to the outer wall of the feed trough, and a scraper assembly is arranged on the feed trough. The scraper assembly includes a plate body hung with the mounting column, a handle fixed to the top of the plate body, a connecting rod fixed to the bottom of the plate body, and a push plate fixed to the lower end of the connecting rod. The number of the connecting rods and the number of the push plates are equal to the number of the first dividing hoppers and their positions correspond one to one. The length of the push plate is equal to the width of the inner side of the first dividing hopper.
[0019] By adopting the above technical solution, when the cleaning plate pushes the wet coal on the inner wall of the first distribution hopper to the side close to the second mounting plate, in order to clean a small amount of wet coal stuck to the cleaning plate and the inner wall of the first distribution hopper close to the second mounting plate, the staff only needs to use the handles to place multiple push plates into multiple first distribution hoppers respectively for cleaning.
[0020] Furthermore, when the cleaning plate is in a vertical state, the lower end of the cleaning plate extends into the first material distribution hopper; when the surface of one side of the cleaning plate is in contact with the inclined surface of the limit block, the height of the lower end of the cleaning plate is greater than the height of the bottom of the first material distribution hopper.
[0021] By adopting the above technical solution, the cleaning effect of the cleaning plate on the first sub-hopper is guaranteed.
[0022] In summary, the present invention has the following beneficial effects:
[0023] 1. In this application, the coal sample can be quantitatively reduced by using a reduction divider, which is a conventional technology in the prior art and does not need to be elaborated here. In order to avoid the situation where wet coal sticks to the inner wall of the divider hopper and affects the normal use of the reducer, the staff can use a cleaning mechanism to clean the residual coal on the inner wall of the divider hopper after one reduction, which ensures the normal use of the reducer and the smooth progress of coal sample detection and analysis;
[0024] 2. In the present application, the motor drives the bidirectional threaded rod to rotate after working. Since the bidirectional threaded rod is threadedly connected to the first mounting plate and the second mounting plate, the first mounting plate and the second mounting plate are symmetrically distributed on the two sections of the thread of the bidirectional threaded rod, and the guide rod is slidably matched with the first mounting plate and the second mounting plate, so that the first mounting plate and the second mounting plate are close to each other, thereby driving the cross bar on the first mounting plate to move toward the side close to the second mounting plate, and the cleaning plate moves synchronously with the cross bar, so as to scrape off the wet coal stuck on the inner walls of both sides of the first dividing hopper. When the side wall of the cleaning plate is close to the bottom of the inclined surface of the first dividing hopper, as the first mounting plate continues to move, the cleaning plate rotates around the rotating shaft, and the torsion spring produces adaptive deformation, so that the cleaning plate cleans the part of the inner wall of the first dividing hopper close to the inclined surface of the first dividing hopper, thereby ensuring the cleanliness of the inner wall of the first dividing hopper, which is beneficial to the normal use of the reduction divider. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
[0026] Figure 2 yes Figure 1 Cross-sectional view of local structure;
[0027] Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle;
[0028] Figure 4 is a schematic structural diagram of an embodiment of the present invention for highlighting a scraper assembly;
[0029] Figure 5 It is a schematic diagram of the structure of an embodiment of the present invention for highlighting the installation and power components;
[0030] Figure 6 It is a plan view schematically showing a state in which the first cleaning component cleans the first sub-hopper according to an embodiment of the present invention;
[0031] Figure 7 It is a structural schematic diagram for highlighting the first cleaning component according to an embodiment of the present invention.
[0032] In the figure: 1. reduction divider; 11. base; 111. first collection frame; 112. second collection frame; 12. support rod; 13. feed trough; 131. fixing plate; 14. first dividing hopper; 15. second dividing hopper; 2. cleaning mechanism; 21. installation and power assembly; 211. two-way threaded rod; 212. guide rod; 213. motor; 214. first mounting plate; 215. second mounting plate; 22. first cleaning assembly; 221. cross bar; 222. cleaning plate; 223. limit plate; 23. second cleaning assembly; 3. rotating shaft; 31. end plate; 32. torsion spring; 4. clearance groove; 5. limit block; 6. mounting column; 7. scraper assembly; 71. plate body; 72. handle; 73. connecting rod; 74. push plate. DETAILED DESCRIPTION
[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.
[0034] like Figure 1-7 As shown, the embodiment of the present application discloses a high uniformity quantitative shrinking and packaging process for a coal standard sample, comprising the following steps:
[0035] S1. Select a suitable splitter 1 according to the nominal maximum particle size of the coal sample to be split, use a dustpan to pour the split coal sample from the feed trough 13 into the splitting hopper, and swing it back and forth along the width direction of the splitter 1 to make the coal sample pass through the splitter 1 relatively evenly;
[0036] The reducing and dividing device 1 is provided with a cleaning mechanism 2 for cleaning the residual coal in the dividing hopper;
[0037] S2. Take a coal sample from any side, clean the residual coal in the dividing hopper through the cleaning mechanism 2, and continue to divide the taken coal sample again using the steps in S1, and keep the samples alternately. After multiple divisions, the obtained samples are divided into sample bottles.
[0038] The coal sample can be quantitatively reduced by the reduction divider 1, which is a conventional technology in the prior art and does not need to be elaborated here. In order to avoid the situation where wet coal sticks to the inner wall of the divider hopper and affects the normal use of the reducer, the staff can use the cleaning mechanism 2 to clean the residual coal on the inner wall of the divider hopper after one reduction, thereby ensuring the normal use of the reducer and the smooth progress of the coal sample detection and analysis.
[0039] The shrinking two-part divider 1 includes a base 11, a support rod 12 fixed to the top of the base 11, a feed trough 13 fixed to the top of the support rod 12, a first dividing hopper 14 fixed and connected to the bottom of the feed trough 13, and a second dividing hopper 15 fixed and connected to the bottom of the feed trough 13. Multiple first dividing hoppers 14 and second dividing hoppers 15 are alternately arranged and symmetrically distributed on both sides of the feed trough 13. The top of the base 11 is provided with a first collecting frame 111 for receiving the discharge of multiple first dividing hoppers 14 and a second collecting frame 112 for receiving the discharge of the second dividing hopper 15.
[0040] Four fixed plates 131 are fixed on the top of the feed trough 13 and distributed in a rectangular array at the four corners of the feed trough 13. The cleaning mechanism 2 includes a mounting and power assembly 21, a first cleaning assembly 22 for cleaning the inner wall of the first sub-hopper 14, and a second cleaning assembly 23 for cleaning the inner wall of the second sub-hopper 15; the mounting and power assembly 21 includes a bidirectional threaded rod 211 rotatably mounted between two of the fixed plates 131, a guide rod 212 fixed between the other two fixed plates 131, a motor 213 fixed on one of the fixed plates 131 and used to drive the bidirectional threaded rod 211, a first mounting plate 214 mounted together on the bidirectional threaded rod 211 and the guide rod 212, and a second mounting plate 214 mounted together on the bidirectional threaded rod 211 and the guide rod 212. The second mounting plate 215 on 12, the axial direction of the bidirectional threaded rod 211 is parallel to the width direction of the feed trough 13, the bidirectional threaded rod 211 is provided with two sections of external threads with opposite rotation directions and equal pitches, the first mounting plate 214 and the second mounting plate 215 are symmetrically distributed on the two sections of the thread of the bidirectional threaded rod 211, the bidirectional threaded rod 211 passes through the first mounting plate 214 and the second mounting plate 215 and is threadedly connected, the guide rod 212 passes through the first mounting plate 214 and the second mounting plate 215 and is slidably matched, the first cleaning component 22 is provided with a plurality of groups and are all installed on the first mounting plate 214, the number of groups of the first cleaning component 22 is equal to the number of the first dividing hopper 14 and the positions correspond, the number of groups of the second cleaning component 23 is equal to the number of the second dividing hopper 15 and the positions correspond.
[0041] The first cleaning assembly 22 includes a cross bar 221 fixed on the side wall of the first mounting plate 214 close to the second mounting plate 215, a cleaning plate 222 rotatably mounted on the cross bar 221, and a limiting plate 223 fixed to the bottom of the cross bar 221 and vertically arranged, the limiting plate 223 is located on the side of the first mounting plate 214 close to the second mounting plate 215, and the side walls on both sides of the cleaning plate 222 are respectively pressed against the inner walls on both sides of the first distribution hopper 14. The cleaning plate 222 is provided with a rotating shaft 3 fixed to the cleaning plate 222 at a position close to its upper end, and an end plate 31 is fixed to the end of the rotating shaft 3. A torsion spring 32 fixed between the end plate 31 and the cross bar 221 is sleeved on the rotating shaft 3. The cleaning plate 222 is pressed against the side wall of the limiting plate 223 under the action of the torsion spring 32, and a clearance groove 4 is opened at the position corresponding to the second mounting plate 215 and the cross bar 221.
[0042] After the motor 213 works, it drives the bidirectional threaded rod 211 to rotate. Since the bidirectional threaded rod 211 is threadedly connected with the first mounting plate 214 and the second mounting plate 215, the first mounting plate 214 and the second mounting plate 215 are symmetrically distributed on the two threads of the bidirectional threaded rod 211, and the guide rod 212 is slidably matched with the first mounting plate 214 and the second mounting plate 215, so that the first mounting plate 214 and the second mounting plate 215 are close to each other, thereby driving the cross bar 221 on the first mounting plate 214 toward the side close to the second mounting plate 215. The cleaning plate 222 moves synchronously with the cross bar 221 to scrape off the wet coal stuck on the inner walls on both sides of the first sub-hopper 14. When the side wall of the cleaning plate 222 is close to the bottom of the inclined surface of the first sub-hopper 14, as the first mounting plate 214 continues to move, the cleaning plate 222 rotates around the rotating shaft 3, and the torsion spring 32 produces an adaptive deformation, so that the cleaning plate 222 cleans the inner wall of the first sub-hopper 14 close to the inclined surface of the first sub-hopper 14, thereby ensuring the cleanliness of the inner wall of the first sub-hopper 14 and facilitating the normal use of the reduction divider 1.
[0043] In order to facilitate the flashed coal sample to enter the first distribution hopper 14 or the second distribution hopper 15 smoothly, a limit block 5 with a right-angled trapezoidal cross-section is fixed to the bottom of the cross bar 221. The inclined surface of the limit block 5 is parallel to the inclined surface of the first distribution hopper 14, and the limit block 5 is located on the side of the cleaning plate 222 away from the second mounting plate 215.
[0044] A mounting column 6 is fixed to the outer wall of the feed trough 13, and a scraper assembly 7 is arranged on the feed trough 13. The scraper assembly 7 includes a plate body 71 hung with the mounting column 6, a handle 72 fixed to the top of the plate body 71, a connecting rod 73 fixed to the bottom of the plate body 71, and a push plate 74 fixed to the lower end of the connecting rod 73. The number of connecting rods 73 and the number of push plates 74 are equal to the number of first dividing hoppers 14 and their positions correspond one to one. The length of the push plate 74 is equal to the width of the inner side of the first dividing hopper 14.
[0045] When the cleaning plate 222 pushes the wet coal on the inner wall of the first distribution hopper 14 to the side close to the second mounting plate 215, in order to clean a small amount of wet coal stuck on the cleaning plate 222 and the inner wall of the first distribution hopper 14 close to the second mounting plate 215, the staff only needs to use the handle 72 to place multiple push plates 74 into multiple first distribution hoppers 14 respectively (the two sides of the push plates 74 are respectively in contact with the side wall of the cleaning plate 222 close to the second mounting plate 215 and the inner wall of the first distribution hopper 14 close to the second mounting plate 215), and push the handle 72 back and forth to clean through the push plates 74.
[0046] In order to ensure the cleaning effect of the cleaning plate 222 on the first sub-hopper 14, when the cleaning plate 222 is in a vertical state, the lower end of the cleaning plate 222 extends into the first sub-hopper 14; when the surface of one side of the cleaning plate 222 is in contact with the inclined surface of the limit block 5, the height of the lower end of the cleaning plate 222 is greater than the height of the bottom of the first sub-hopper 14. In this embodiment, the structure and function of the second cleaning assembly 23 are exactly the same as those of the first cleaning assembly 22 (cleaning the wet coal stuck to the inner wall of the second sub-hopper 15), and there is no need to repeat them.
[0047] The principle of using a high uniformity quantitative reduction and packaging process for a standard coal sample in this embodiment is as follows: the coal sample can be quantitatively reduced by the reduction divider 1, which is a conventional technology in the prior art and does not need to be elaborated on here. In order to avoid the situation where wet coal sticks to the inner wall of the divider hopper and affects the normal use of the reducer, the staff can use the cleaning mechanism 2 to clean the residual coal on the inner wall of the divider hopper after a reduction, thereby ensuring the normal use of the reducer and the smooth progress of the coal sample detection and analysis.
[0048] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.
Claims
1. A high uniformity quantitative shrinking and packaging process for coal standard samples, characterized in that: The steps include: S1. Select a suitable splitter (1) according to the nominal maximum particle size of the coal sample to be split, use a dustpan to pour the split coal sample from the feed trough (13) into the splitting hopper, and swing the splitter (1) back and forth along the width direction of the splitter (1) to make the coal sample pass through the splitter (1) more evenly; Wherein, a cleaning mechanism (2) for cleaning the residual coal in the dividing hopper is arranged in the dividing and dividing device (1); S2. Take a coal sample from any side, clean the residual coal in the hopper through the cleaning mechanism (2), and continue to divide the taken coal sample again using the steps in S1, alternately retaining samples, and after multiple divisions, the obtained samples are divided into sample bottles.
2. The high uniformity quantitative shrinking and packaging process for coal standard samples according to claim 1 is characterized by: The shrinkage divider (1) comprises a base (11), a support rod (12) fixed to the top of the base (11), a feed trough (13) fixed to the top of the support rod (12), a first distribution hopper (14) fixed to and connected with the bottom of the feed trough (13), and a second distribution hopper (15) fixed to and connected with the bottom of the feed trough (13), wherein a plurality of the first distribution hoppers (14) and the second distribution hoppers (15) are alternately provided and symmetrically distributed on both sides of the feed trough (13), and a first collection frame (111) for receiving the discharge of the plurality of first distribution hoppers (14) and a second collection frame (112) for receiving the discharge of the second distribution hopper (15) are provided at the top of the base (11).
3. The high uniformity quantitative shrinking and packaging process for coal standard samples according to claim 2 is characterized by: The top of the feed trough (13) is fixed with four fixing plates (131) distributed in a rectangular array at the four corners of the feed trough (13); the cleaning mechanism (2) comprises a mounting and power assembly (21), a first cleaning assembly (22) for cleaning the inner wall of the first distribution hopper (14), and a second cleaning assembly (23) for cleaning the inner wall of the second distribution hopper (15); The installation and power assembly (21) comprises a bidirectional threaded rod (211) rotatably installed between two of the fixing plates (131), a guide rod (212) fixed between the other two fixing plates (131), a motor (213) fixed on one of the fixing plates (131) and used to drive the bidirectional threaded rod (211), a first installation plate (214) installed on the bidirectional threaded rod (211) and the guide rod (212), and a second installation plate (215) installed on the bidirectional threaded rod (211) and the guide rod (212), wherein the axial direction of the bidirectional threaded rod (211) is parallel to the width direction of the feed trough (13), and the bidirectional threaded rod (211) is provided with two sections of opposite rotation directions. The first mounting plate (214) and the second mounting plate (215) are symmetrically distributed on two sections of the thread of the bidirectional threaded rod (211); the bidirectional threaded rod (211) passes through the first mounting plate (214) and the second mounting plate (215) and is threadedly connected; the guide rod (212) passes through the first mounting plate (214) and the second mounting plate (215) and is slidably matched; the first cleaning assembly (22) is provided with a plurality of groups and all are mounted on the first mounting plate (214); the number of groups of the first cleaning assembly (22) is equal to the number of the first material distribution hopper (14) and the positions correspond; the number of groups of the second cleaning assembly (23) is equal to the number of the second material distribution hopper (15) and the positions correspond.
4. The high uniformity quantitative shrinking and packaging process for coal standard samples according to claim 3 is characterized by: The first cleaning assembly (22) comprises a cross bar (221) fixed on a side wall of the first mounting plate (214) close to the second mounting plate (215), a cleaning plate (222) rotatably mounted on the cross bar (221), and a limit plate (223) fixed to the bottom of the cross bar (221) and vertically arranged, wherein the limit plate (223) is located on a side of the first mounting plate (214) close to the second mounting plate (215), and the side walls on both sides of the cleaning plate (222) are respectively aligned with the sides of the first material distribution hopper (14). The cleaning plate (222) is pressed against the inner wall, a rotating shaft (3) fixed to the cleaning plate (222) is provided at a position near the upper end thereof, an end plate (31) is fixed to the end of the rotating shaft (3), a torsion spring (32) fixed between the end plate (31) and the cross bar (221) is sleeved on the rotating shaft (3), the cleaning plate (222) is pressed against the side wall of the limiting plate (223) under the action of the torsion spring (32), and a clearance groove (4) is provided at a position corresponding to the second mounting plate (215) and the cross bar (221).
5. The high uniformity quantitative shrinking and packaging process for coal standard samples according to claim 4 is characterized by: A limit block (5) having a right-angle trapezoidal cross section is also fixed at the bottom of the cross bar (221); the inclined surface of the limit block (5) is parallel to the inclined surface of the first material distribution hopper (14); and the limit block (5) is located on a side of the cleaning plate (222) away from the second mounting plate (215).
6. A high uniformity quantitative reduction and packaging process for coal standard samples according to claim 5, characterized in that: The outer wall of the feed trough (13) is fixed with a mounting column (6), and a scraper assembly (7) is arranged on the feed trough (13). The scraper assembly (7) comprises a plate body (71) hung with the mounting column (6), a handle (72) fixed to the top of the plate body (71), a connecting rod (73) fixed to the bottom of the plate body (71), and a push plate (74) fixed to the lower end of the connecting rod (73). The number of the connecting rods (73) and the number of the push plates (74) are equal to the number of the first material distribution hopper (14) and their positions correspond one to one. The length of the push plate (74) is equal to the width of the inner side of the first material distribution hopper (14).
7. The high uniformity quantitative shrinking and packaging process for coal standard samples according to claim 5 is characterized by: When the cleaning plate (222) is in a vertical state, the lower end of the cleaning plate (222) extends into the first material distribution hopper (14); when the surface of one side of the cleaning plate (222) is in contact with the inclined surface of the limit block (5), the height of the lower end of the cleaning plate (222) is greater than the height of the bottom of the first material distribution hopper (14).