Coal ash content alternating detection pretreatment device and method

Abstract

The application discloses a kind of ash content of refined coal alternate detection pretreatment device and pretreatment method, it is related to ash content detection pretreatment technical field of refined coal.The ash content of refined coal alternate detection pretreatment device includes two-division classifier of division;Further include vertical feeding mechanism;The vertical feeding mechanism includes vertical screw conveyor and transition material guiding mechanism, vertical screw conveyor is used to the reserved coal material that two-division classifier bottom side discharges is transported to two-division classifier top.The application is formed by oblique material guiding box and electric control gate cooperation temporary storage reserved coal sample container, it is convenient to stir shaft to the reserved coal sample that two-division classifier bottom discharges needs to be mixed as a whole automatically, and cooperate vertical screw conveyor to transport again and automatically put into two-division classifier to the coal sample that remains to be reserved and carry out division, so repeatedly, can realize the automatic mixing division processing of each reserved sample, without manual repeated operation, improve processing efficiency and convenience.

Description

Technical Field

[0001] This invention relates to the field of pretreatment technology for clean coal ash content detection, specifically to a clean coal ash content alternating detection pretreatment device and pretreatment method. Background Technology

[0002] Ash content testing of clean coal involves using scientific methods to determine the percentage by mass of solid residue remaining after the complete combustion of clean coal under specified conditions. Alternating testing employs two ash content testing methods based on different principles or operating speeds simultaneously to ensure the reliability of the final data. In the field of clean coal ash content testing, pretreatment is a crucial step in ensuring the accuracy and comparability of test results.

[0003] One of the main steps in the pretreatment of clean coal ash for testing is sample preparation, and one of the core steps in sample preparation is reduction. Reduction involves using a mechanical reducer to repeatedly mix and reduce the crushed sample to obtain a representative sample of at least a certain quantity. The specific operation is as follows: coal material crushed to the corresponding particle size is poured into the reducer from above, and the coal material is divided into two parts. One part is then discarded, and the other part is retained, mixed, and poured back into the reducer. This mixing and reduction process is repeated until the coal material approaches the required mass before proceeding with subsequent operations.

[0004] However, the current technology requires multiple sampling of the coal material during the reduction process. This involves repeatedly discarding the evenly divided coal material and retaining another portion for further reduction. This repeated process relies heavily on manual labor to manually remove the coal material retained from each sampling, mix it manually, and then pour it back into the reducer. This repetitive operation is cumbersome, inconvenient, labor-intensive, and inefficient. Especially when performing alternating testing of the ash content of clean coal, where two methods are used alternately to balance timeliness and reliability, the efficiency requirements for pretreatment and sample preparation are even higher, necessitating further improvements in pretreatment efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a pretreatment device and method for alternating detection of ash content in clean coal, so as to solve the technical problem that in the prior art, the coal sample needs to be mixed and poured into the pretreatment device manually and repeatedly during the pretreatment process of reducing coal sample by a pretreatment device, which is cumbersome, inconvenient and inefficient.

[0006] The technical problem to be solved by this invention can be achieved through the following technical solution: A pretreatment device for alternating detection of ash content in clean coal includes a reducing and separating device; it also includes a vertical feeding mechanism; the vertical feeding mechanism includes a vertical screw conveyor and a transition guiding mechanism, wherein the bottom of the vertical screw conveyor is the feeding side and the top is the discharging side, and the vertical screw conveyor is used to transport the retained coal material discharged from the bottom side of the reducing and separating device to the top of the reducing and separating device; The transition material guiding mechanism includes an inclined guide box and an electrically controlled gate. The inclined guide box is configured between the discharge port on one side of the bottom of the reducing divider and the feed side of the vertical screw conveyor. The electrically controlled gate is configured between the inclined guide box and the vertical screw conveyor. The electrically controlled gate is used to open when the discharge of the retained sample side at the bottom of the reducing divider stops during each reducing process. The inclined guide box is also rotatably connected to a stirring shaft for mixing the retained coal.

[0007] A pretreatment method for alternating detection of ash content in clean coal, the specific steps of which are as follows: The first step is to evenly feed the crushed coal into the top inlet of the divider; The second step is to use a splitter to divide the coal into two samples, discard one sample and keep the other. The third step involves collecting the retained coal samples through an inclined guide box and mixing them using a stirring shaft. The fourth step is to use a vertical screw conveyor to transport the mixed coal material to the top of the splitter.

[0008] Preferably, the electrically controlled gate includes an electric telescopic rod and an on / off gate, the telescopic end of the electric telescopic rod is fixedly connected to the on / off gate, and the on / off gate is positioned on the side of the inclined guide box close to the vertical screw conveyor.

[0009] Preferably, the vertical screw conveyor includes a vertical cylinder and a screw conveyor blade. The vertical cylinder is vertically fixed on one side of the divider. The bottom of the vertical cylinder, near the divider, has an inlet that connects with the inclined guide box. The top of the vertical cylinder has an outlet mechanism that connects with the top inlet of the divider. The screw conveyor blade is rotatably connected inside the vertical cylinder.

[0010] Preferably, the pretreatment device further includes a reciprocating hopper mechanism, which includes a hopper body, a transverse guide rail, and a reciprocating lateral movement drive mechanism. Two sets of transverse guide rails are provided and are horizontally fixedly connected to both sides of the inlet of the divider. Slider blocks corresponding to the transverse guide rails are fixedly connected to both sides of the hopper body. The reciprocating lateral movement drive mechanism is used to drive the hopper body to move reciprocally and laterally at a uniform speed along the transverse guide rail.

[0011] Preferably, the discharge mechanism includes a rotating drum and a guide chute. The rotating drum is rotatably sleeved on the top of the vertical cylinder. A discharge port is opened on the side wall of the rotating drum. A slot is opened on the side of the hopper body near the vertical screw conveyor. The higher end of the guide chute is fixedly connected to the discharge port, and the lower end slides through the slot.

[0012] Preferably, the reciprocating lateral drive mechanism includes a reciprocating lead screw, a first synchronous belt, and a second synchronous belt. A reciprocating lead screw is rotatably connected within each set of transverse guide rails. The slider connected to the hopper body is connected to the reciprocating lead screw. A first synchronous pulley is coaxially fixedly connected to each of the two reciprocating lead screws, and the first synchronous belt is connected between the two first synchronous pulleys. A servo motor for driving the rotation of the screw conveyor blades is provided at the bottom of the vertical screw conveyor. A second synchronous pulley is coaxially fixedly connected to the main shaft of the servo motor and one of the reciprocating lead screws, and the second synchronous belt is connected between the two second synchronous pulleys.

[0013] Preferably, the reciprocating hopper mechanism further includes a material-pushing rotating component, which is horizontally and rotatably disposed at the bottom discharge position of the hopper body.

[0014] Preferably, the material feeding rotating component includes a central shaft and a paddle. The central shaft is horizontally rotatably connected to the bottom material inlet of the hopper body, and multiple paddles are provided and are circumferentially and equidistantly fixed to the side wall of the central shaft.

[0015] Preferably, rollers coaxially connected to the material feeding rotating component are provided on both sides of the outer side of the hopper body, and a guide bar that engages with and contacts the rollers is fixedly connected to one side of the transverse guide rail.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: 1. This invention uses an inclined guide box and an electrically controlled gate to form a temporary storage container for coal samples. This facilitates the automatic mixing of the coal samples to be retained from the bottom of the reducing separator by the stirring shaft. In addition, the vertical screw conveyor can repeatedly and automatically feed the retained coal samples into the reducing separator for reduction, realizing automatic mixing and reduction of the retained samples without the need for repeated manual operation, thus improving processing efficiency and convenience.

[0017] 2. This invention relies on the cooperation of the reciprocating hopper body and the discharge mechanism movably set between the hopper body and the vertical cylinder of the vertical screw conveyor. This allows the coal conveyed vertically by the vertical screw conveyor to fall effectively into the hopper body during the reciprocating motion, and to be evenly dispersed into the divider as the hopper body moves. This facilitates the dividing process and eliminates the need for manual feeding along the length of the divider inlet, thus improving operational convenience.

[0018] 3. This invention relies on the cooperation of rollers and guide bars to realize the rotation of the internally set material-pushing rotating parts during the reciprocating motion of the hopper body, thereby facilitating the normal falling of coal in the hopper body and avoiding blockage and flow. At the same time, it can also control the falling speed of coal by controlling the movement speed of the hopper body, thus effectively controlling the feeding. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the divider in this invention; Figure 4 This is a schematic diagram of the structure of the transition material guiding mechanism in this invention, which is arranged between the feed inlet of the reducing divider and the vertical screw conveyor; Figure 5 This is a schematic diagram of the structure in which the guide chute and the hopper body of the present invention are connected. Figure 6 This is a schematic diagram of the structure in which the rotating drum, the spiral conveying blades, and the vertical cylinder are arranged in cooperation in this invention; Figure 7 This is a schematic diagram of the connection between the hopper body and the transverse guide rail in this invention; Figure 8 This is a schematic diagram of the structure in which the material feeding rotating component and the hopper body of the present invention are connected.

[0020] Explanation of reference numerals in the attached figures: 1. Divider; 2. Reciprocating hopper mechanism; 21. Hopper body; 211. Bayonet; 22. Reciprocating transverse drive mechanism; 221. Second synchronous belt; 222. Second synchronous pulley; 223. First synchronous belt; 224. Reciprocating lead screw; 23. Transverse guide rail; 24. Roller; 25. Guide bar; 26. Material feeding rotating component; 3. Vertical feeding mechanism; 31. Servo motor; 32. Discharge mechanism; 321. Rotary drum; 323. Discharge port; 324. Guide chute; 33. Vertical cylinder; 331. Feed inlet; 34. Transition guide mechanism; 341. Inclined guide box; 342. Stirring shaft; 343. On / off gate; 344. Electric telescopic rod; 35. Screw conveyor blade; 4. Discard box. Detailed Implementation

[0021] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0022] Example 1 One of the main pretreatment steps in the testing of clean coal ash is sample preparation, and one of the core steps in sample preparation is reduction. Reduction involves using a mechanical reducer to repeatedly mix and reduce the crushed sample to obtain a representative sample of at least a certain quantity. Existing reducers mainly use a binary divider, namely the binary divider 1 in this application, which is existing equipment. Its structure consists of a reducer composed of two sets of parallel inclined chutes in opposite directions. The inlets of the two sets of inclined chutes are alternately distributed along the length of the reducer, i.e., the inclined chutes corresponding to one inlet face left, the next inlet faces right, and so on. This design is intended to continuously and equally divide the coal flow into left and right halves at the moment of descent, facilitating the sample division operation. During the process, coal that has been crushed to the corresponding particle size is poured into the separator from above, where it is divided into two parts. One part is then discarded, while the other part is retained, mixed, and poured back into the separator. This mixing and separation process is repeated until the coal approaches the required quality before proceeding with subsequent operations. Currently, the entire process relies on manual labor to continuously remove each sample of coal, mix it, and pour it back into the separator. This repetitive operation is cumbersome, inconvenient, labor-intensive, and inefficient. Especially when performing alternating testing of the ash content of clean coal, where two methods are used alternately to balance timeliness and reliability, the efficiency requirements for pretreatment sample preparation are even higher, necessitating further improvements in pretreatment efficiency.

[0023] To solve the above problems, such as Figures 1 to 8In this embodiment, a pretreatment device for alternating detection of ash content in refined coal includes a reducing divider 1. The specific structure of the reducing divider 1 is as follows: it includes a rectangular box, and the interior of the rectangular box is provided with two rows of inclined troughs facing opposite directions. Each row of inclined troughs includes several troughs. The inlets of the two rows of inclined troughs are alternately distributed along the length of the rectangular box. Thus, there are discharge ports on both sides of the bottom of the reducing divider 1. A sample discard box 4 is provided below the discharge port on one side of the bottom of the reducing divider 1, which can be centrally processed after repeated mixing and reducing operations. The space below the discharge port on the other side is used to store coal samples that need to be retained. The processing device also includes a vertical feeding mechanism 3, which includes a vertical screw conveyor and a transition guiding mechanism 34. The bottom of the vertical screw conveyor is the feeding side and the top is the discharging side. The vertical screw conveyor is used to transport the retained coal material discharged from the bottom side of the splitter 1 to the top of the splitter 1 to realize automatic repeated feeding. The transition material guiding mechanism 34 includes an inclined guide box 341 and an electrically controlled gate. The inclined guide box 341 is configured between the discharge port on one side of the bottom of the reducing divider 1 and the feed side of the vertical screw conveyor. It is used to guide the coal discharged from the bottom side of the reducing divider 1 into the vertical screw conveyor. The electrically controlled gate is configured between the inclined guide box 341 and the vertical screw conveyor. The electrically controlled gate is used to open when the bottom side of the reducing divider 1 that discharges the retained sample stops discharging during each reducing process. The inclined guide box 341 is also rotatably connected to a stirring shaft 342 for stirring and mixing the retained coal. The stirring shaft 342 can be driven by an independent motor to rotate continuously. Under the action of the electrically controlled gate, it can be ensured that the coal is completely separated by the reducing divider 1 and then stays in the inclined guide box 341. The stirring shaft 342 stirs and mixes the retained coal as a whole, ensuring the stirring and mixing effect. Then the electrically controlled gate is opened, allowing the stirred and mixed coal to flow into the vertical screw conveyor for conveying.

[0024] Working principle: When the crushed and qualified coal is first poured into the reducing and dividing device 1, it can be poured manually. Then the reducing and dividing device 1 divides the coal into two parts, which are discharged from the bottom sides. The coal discharged from one side is discarded and falls into the discard box 4, while the coal from the other side falls into the inclined guide box 341 and is collected. It is mixed by the rotation of the set stirring shaft 342. After the coal has been completely separated by the reducing and dividing device 1, the electrically controlled gate is opened, so that the mixed coal flows into the vertical screw conveyor. The vertical screw conveyor transports the retained and mixed coal to the top of the reducing and dividing device 1 to achieve automatic feeding. Subsequent repeated mixing and reducing do not require manual operation.

[0025] The above-mentioned alternating detection and pretreatment device for clean coal ash content can be used to implement a method for alternating detection and pretreatment of clean coal ash content. The specific steps are as follows: Step 1: Evenly feed the crushed and qualified coal material into the top inlet of the reducing and dividing unit 1; The second step is to use a reducing and dividing device 1 to divide the input coal into two samples, discard one sample and keep the other sample. The third step is to collect the retained coal sample through the inclined guide box 341 and mix it by stirring shaft 342. The fourth step is to use a vertical screw conveyor to transport the mixed coal material to the top of the reducing and dividing unit 1.

[0026] It should be emphasized that the core improvement of this embodiment is that: the inclined guide box 341 and the electric control gate are used to form a temporary storage container for coal samples, which facilitates the automatic mixing of the retained coal samples by the stirring shaft 342. The samples are then automatically fed back into the divider 1 by the vertical screw conveyor, realizing automatic mixing and dividing of the retained samples each time, without the need for repeated manual operation, thus improving processing efficiency and convenience.

[0027] It should be noted that, such as Figure 4 As shown, since multiple inclined troughs are distributed along the length of the dividing divider 1, in order to facilitate the coal falling into the inclined guide box 341, the side of the inclined guide box 341 near the dividing divider 1 is rectangular with a wide opening. In order to facilitate the coal to collect and flow into the vertical screw conveyor, two symmetrically distributed inclined guide side plates are provided on the side of the inclined guide box 341 that is connected to the feed side of the vertical screw conveyor, and the ends of the inclined guide side plates extend to the feed position of the vertical screw conveyor. The inclined guide box 341 is inclined as a whole, with the side near the vertical screw conveyor being the lower side, which facilitates the coal to collect and flow into the vertical screw conveyor.

[0028] It should be noted that, in order to improve the mixing effect of the coal material temporarily stored in the inclined guide box 341, multiple stirring shafts 342 can be distributed at equal intervals.

[0029] It should also be noted that, in order to facilitate the measurement of the coal sample quality on the retained side, a weighing unit can be set in the waste sample box 4. In this way, only the weight of the initial coal is known. The calculation system can subtract the gradually accumulated discarded coal in the waste sample box 4 from the initial coal weight each time to determine whether the retained coal has reached the required weight, thereby stopping the reduction operation.

[0030] Furthermore, a certain space can be reserved below the inclined guide box 341 for placing containers. A rotatable movable plate is provided on the bottom plate of the inclined guide box 341. The movable plate is fitted and spliced ​​on the bottom plate of the inclined guide box 341, and one side of the movable plate is movably connected to the bottom plate of the inclined guide box 341 through a hinge. A latch can also be installed between the movable plate and the inclined guide box 341. When the weight of the coal falling into the inclined guide box 341 reaches the required weight, the latch between the movable plate and the inclined guide box 341 can be released, so that the movable plate flips down and opens to an inclined state, thereby facilitating the discharge of the coal in the inclined guide box 341.

[0031] It should be further explained that the opening and closing control of the electrically controlled gate can be based on manual control, or a laser sensor switch can be installed on the inner wall of the inclined guide box 341 near the reducing divider 1, that is, installed at the inlet position of the inclined guide box 341. The receiving end and the transmitting end of the laser sensor switch are set at opposite positions on the inner walls of the two sides of the inclined guide box 341. When the coal falls into the inclined guide box 341, the position of the laser sensor switch will cause obstruction. At this time, the laser sensor switch will feed back a control signal, and the supporting control system will keep the electrically controlled gate closed. When the coal stops falling into the inclined guide box 341, and the laser sensor switch is unobstructed for a set time, the supporting control system can control the electrically controlled gate to open.

[0032] like Figure 4 As shown, in some specific embodiments of this example, the electrically controlled gate includes an electric telescopic rod 344 and an on / off gate 343. One end of the electric telescopic rod 344 is fixedly installed relative to the inclined guide box 341, and the other end is a telescopic end, vertically downward. The telescopic end of the electric telescopic rod 344 is fixedly connected to the on / off gate 343. The on / off gate 343 is located on the side of the inclined guide box 341 near the vertical screw conveyor. The on / off gate 343 is raised or lowered by the electric telescopic rod 344 to control the flow of coal.

[0033] Of course, since the inclined guide box 341 is connected to the feed side of the vertical screw conveyor with two symmetrically distributed inclined guide side plates, it will cause coal to accumulate. Therefore, the on / off gate 343 can be set near the feed side of the vertical screw conveyor, and the stirring shaft 342 is also set near the feed side of the vertical screw conveyor.

[0034] like Figures 4 to 6As shown in the figure, in some specific implementations of this embodiment, the vertical screw conveyor includes a vertical cylinder 33 and a screw conveyor blade 35. The vertical cylinder 33 is vertically fixedly installed on one side of the reducing and dividing unit 1. Specifically, a support platform can be set at the bottom of the reducing and dividing unit 1, and the vertical cylinder 33 is directly fixedly connected to the support platform. The bottom of the vertical cylinder 33 is provided with a feed inlet 331 that connects with the inclined guide box 341 on the side near the reducing and dividing unit 1. The top of the vertical cylinder 33 is provided with a discharge mechanism 32 that connects with the top inlet of the reducing and dividing unit 1. The screw conveyor blade 35 is rotatably connected inside the vertical cylinder 33. The coal enters the bottom inner side of the vertical cylinder 33 through the feed inlet 331 and is continuously conveyed to the top by the rotating screw conveyor blade 35, and discharged to the top of the reducing and dividing unit 1 through the discharge mechanism 32.

[0035] Example 2 It is understandable that in Embodiment 1, the vertical screw conveyor merely transports coal from the bottom to the top of the dividing divider 1 and feeds it in. However, in the prior art, since the inclined troughs distributed in the dividing divider 1 are arranged alternately along the length direction, when feeding coal into the dividing divider 1, only by making the hopper move back and forth evenly along the length direction of the dividing divider 1 can the coal be easily distributed relatively evenly into the inclined troughs on both sides, thereby ensuring the reliability of the final dividing result. The vertical screw conveyor disclosed in Embodiment 1 is not convenient for the coal to be evenly fed along the length direction of the inlet of the dividing divider 1.

[0036] like Figures 1 to 5 To address the aforementioned issues, the pretreatment device further includes a reciprocating hopper mechanism 2. The reciprocating hopper mechanism 2 comprises a hopper body 21, a transverse guide rail 23, and a reciprocating transverse drive mechanism 22. Two sets of transverse guide rails 23 are provided and are horizontally fixedly connected to both sides of the inlet of the divider 1. Slider blocks corresponding to the transverse guide rails 23 are fixedly connected to both sides of the hopper body 21. The reciprocating transverse drive mechanism 22 is used to drive the hopper body 21 to reciprocate transversely at a uniform speed along the transverse guide rails 23. It should be noted that the hopper body 21 is funnel-shaped, and the bottom discharge position is elongated, which can be parallel to the inclined groove inlet of the divider 1 and is of equal size. One end of the discharge mechanism 32 is rotatably engaged with the top of the vertical cylinder 33, and the other end is movably engaged within the hopper body 21.

[0037] Working principle: During the process of the reciprocating lateral drive mechanism 22 driving the hopper body 21 to move at a constant speed along the transverse guide rail 23 in the inlet length direction of the divider 1, the coal conveyed by the vertical screw conveyor is discharged through the discharge mechanism 32 and introduced into the reciprocating hopper body 21. Since the discharge mechanism 32 can rotate around the top of the vertical cylinder 33 and its other end is movably fitted inside the hopper body 21, the discharge mechanism 32 can always introduce the coal into the hopper body 21 during the reciprocating motion of the hopper body 21.

[0038] It should be emphasized that the core improvement of this embodiment is that the reciprocating hopper body 21 and the discharge mechanism 32, which is movably set between the hopper body 21 and the vertical cylinder 33 of the vertical screw conveyor, cooperate with each other to make it easy for the coal material vertically conveyed by the vertical screw conveyor to fall into the hopper body 21 effectively, and to be evenly dispersed into the divider 1 as the hopper body 21 moves, so as to facilitate the division and eliminate the need for manual feeding.

[0039] like Figures 4 to 6 In some specific embodiments of this example, the discharge mechanism 32 includes a rotating drum 321 and a guide chute 324. The top of the vertical drum 33 is open, and the screw conveyor blade 35 is higher than the top opening of the vertical drum 33. The rotating drum 321 is rotatably sleeved on the top of the vertical drum 33, which completely covers the screw conveyor blade 35 that is higher than the vertical drum 33. Specifically, an annular guide rail can be provided on the top side wall of the vertical drum 33, so that the bottom of the rotating drum 321 is rotatably connected to the annular guide rail. A discharge port 323 is opened on the side wall of the rotating drum 321, and a slot 211 is opened on the side of the hopper body 21 near the vertical screw conveyor. The higher end of the guide chute 324 is fixedly connected to the discharge port. At the opening 323, the lower end slides through the slot 211. It should be noted that the size of the slot 211 is larger than the width of the guide chute 324, ensuring that the guide chute 324 can rotate around the vertical cylinder 33 through the position of the slot 211 during the reciprocating movement of the hopper body 21. During this process, the guide chute 324 can slide and rotate relative to the slot 211. During this process, the length of the guide chute 324 extending into the hopper body 21 will change continuously, but it will not detach and will not cause movement obstruction. In addition, in order to facilitate the movement of the guide chute 324 and the hopper body 21, the vertical cylinder 33 can be aligned with the midpoint of the divider 1.

[0040] When the hopper body 21 reciprocates along the length of the divider 1, due to the presence of the rotating drum 321, the hopper body 21 can drive the guide chute 324 to rotate around the top of the vertical screw conveyor through the position of the bayonet 211. During this process, when the coal pushed by the screw conveyor blade 35 reaches the position of the rotating drum 321, it is discharged from the discharge port 323 and slides down the inclined guide chute 324 into the moving hopper body 21.

[0041] like Figures 1 to 2 As shown, in some specific embodiments of this example, in order to facilitate the matching of the movement speed of the hopper body 21 with the feeding speed of the vertical screw conveyor, the best approach is to have both share a single drive source, with proportional transmission via gears or other components. Therefore, the reciprocating transverse drive mechanism 22 includes a reciprocating screw 224, a first synchronous belt 223, and a second synchronous belt 221. A reciprocating screw 224 is rotatably connected within each set of transverse guide rails 23. The slider connected to the hopper body 21 is engaged with the reciprocating screw 224. Specifically, the reciprocating screw 224 can pass through the slider, and the reciprocating screw 224 and the slider are engaged via a helical groove. The surface of the reciprocating screw 224 is provided with... It has bidirectional intersecting spiral grooves, and the slider is equipped with balls or sliding keys that match the groove shape. When the reciprocating screw 224 rotates, the groove wall pushes the slider to make reciprocating linear motion along the axis, and automatic reversal can be achieved without a reversing mechanism. The two reciprocating screws 224 are coaxially fixedly connected to the first synchronous pulleys, and the first synchronous belt 223 is connected between the two first synchronous pulleys. The bottom of the vertical screw conveyor is equipped with a servo motor 31 for driving the screw conveyor blade 35 to rotate. The extended end of the main shaft of the servo motor 31 and one of the reciprocating screws 224 are coaxially fixedly connected to the second synchronous pulley 222, and the second synchronous belt 221 is connected between the two second synchronous pulleys 222.

[0042] When the servo motor 31 drives the screw conveyor blade 35 to run, it drives one of the reciprocating screws 224 to rotate through the second synchronous wheel 222 and the second synchronous belt 221. The driven reciprocating screw 224 then drives the other reciprocating screw 224 to rotate synchronously in the same direction through the first synchronous wheel and the first synchronous belt 223, thereby driving the hopper body 21 to move back and forth laterally.

[0043] It should be noted that if the main shaft of the servo motor 31 of the vertical screw conveyor is directly coaxially connected to the second synchronous pulley 222, then the main shaft of the servo motor 31 and the drive end of the screw conveyor blade 35 need to be connected by a steering helical gear to achieve vertical position transmission. This technology is existing technology and can be selected and used based on actual needs.

[0044] Example 3 It is understandable that in Embodiment 2, during the process of reciprocating movement of the hopper body 21 to discharge coal, the bottom opening of the hopper body 21 should not be too large in order to ensure uniform discharge. However, this may cause coal to get stuck in the hopper body 21, resulting in the inability to discharge normally.

[0045] like Figure 8 As shown, in order to solve the above problems, the reciprocating hopper mechanism 2 also includes a material feeding rotating component 26, which is horizontally and rotatably arranged at the bottom discharge position of the hopper body 21.

[0046] The material feeding rotating component 26 includes a central shaft and a shovel. The central shaft is horizontally rotatably connected to the bottom material inlet of the hopper body 21. Multiple shovels are provided and are circumferentially and equidistantly fixed to the side wall of the central shaft.

[0047] In addition, in order to facilitate the automatic rotation of the material feeding rotating component 26 during the reciprocating motion of the hopper body 21, rollers 24 coaxially connected to the material feeding rotating component 26 are provided on both sides of the hopper body 21. Specifically, the rollers 24 are coaxially fixedly connected to the central axis of the material feeding rotating component 26. A guide bar 25 that engages with the rollers 24 is fixedly connected to one side of the transverse guide rail 23. Of course, the rollers 24 can be gears and the guide bar 25 can be racks.

[0048] Working principle: When the hopper body 21 reciprocates along the transverse guide rail 23, the roller 24 rolls along the guide bar 25. During this process, the roller 24 drives the central axis of the material feeding rotating component 26 to rotate. The central axis then uses the paddle to move the coal material in the hopper body 21, ensuring that the coal material can fall normally and avoiding blockage.

[0049] It should be emphasized that the core improvement of this embodiment is that the roller 24 and the guide bar 25 work together to realize the rotation of the internally set material feeding rotating part 26 during the reciprocating motion of the hopper body 21, so that the coal material in the hopper body 21 can fall normally and avoid blockage and flow. At the same time, the movement speed of the hopper body 21 can be controlled to control the falling speed of the coal material, effectively controlling the feeding.

[0050] The specific implementation schemes of the different embodiments described above can be freely combined and implemented without contradiction.

[0051] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed application.

Claims

1. A pretreatment device for alternating detection of ash content in clean coal, comprising a reducing and separating device (1); characterized in that, It also includes a vertical feeding mechanism (3); the vertical feeding mechanism (3) includes a vertical screw conveyor and a transition guiding mechanism (34). The bottom of the vertical screw conveyor is the feeding side and the top is the discharging side. The vertical screw conveyor is used to transport the retained coal material discharged from the bottom side of the splitter (1) to the top of the splitter (1). The transition material guiding mechanism (34) includes an inclined guide box (341) and an electrically controlled gate. The inclined guide box (341) is configured between the discharge port on one side of the bottom of the divider (1) and the feed side of the vertical screw conveyor. The electrically controlled gate is configured between the inclined guide box (341) and the vertical screw conveyor. The electrically controlled gate is used to open when the bottom of the divider (1) stops discharging the retained sample during each dividing process. The inclined guide box (341) is also rotatably connected to a stirring shaft (342) for mixing the retained coal.

2. The alternating detection and pretreatment device for clean coal ash content as described in claim 1, characterized in that, The electrically controlled gate includes an electric telescopic rod (344) and an on / off gate (343). The telescopic end of the electric telescopic rod (344) is fixedly connected to the on / off gate (343). The on / off gate (343) is positioned on the side of the inclined guide box (341) near the vertical screw conveyor.

3. The alternating detection and pretreatment device for clean coal ash content as described in claim 1, characterized in that, The vertical screw conveyor includes a vertical cylinder (33) and a screw conveyor blade (35). The vertical cylinder (33) is vertically fixed on one side of the divider (1). The bottom of the vertical cylinder (33) is provided with a feed inlet (331) that connects with the inclined guide box (341) on the side close to the divider (1). The top of the vertical cylinder (33) is provided with a discharge mechanism (32) that connects with the top inlet of the divider (1). The screw conveyor blade (35) is rotatably connected inside the vertical cylinder (33).

4. The alternating detection and pretreatment device for clean coal ash content as described in claim 3, characterized in that, It also includes a reciprocating hopper mechanism (2), which includes a hopper body (21), a transverse guide rail (23) and a reciprocating transverse drive mechanism (22). The transverse guide rail (23) is provided in two sets and is horizontally fixedly connected to both sides of the inlet of the divider (1). The hopper body (21) is fixedly connected to both sides of a slider that slides in accordance with the transverse guide rail (23). The reciprocating transverse drive mechanism (22) is used to drive the hopper body (21) to move reciprocally and transversely at a constant speed along the transverse guide rail (23).

5. The alternating detection and pretreatment device for clean coal ash content as described in claim 4, characterized in that, The discharge mechanism (32) includes a rotating drum (321) and a guide chute (324). The rotating drum (321) is rotatably mounted on the top of the vertical drum (33). A discharge port (323) is provided on the side wall of the rotating drum (321). A slot (211) is provided on the side of the hopper body (21) near the vertical screw conveyor. The higher end of the guide chute (324) is fixedly connected to the discharge port (323), and the lower end slides through the slot (211).

6. The alternating detection and pretreatment device for clean coal ash content as described in claim 4, characterized in that, The reciprocating transverse drive mechanism (22) includes a reciprocating screw (224), a first synchronous belt (223), and a second synchronous belt (221). Each set of transverse guide rails (23) is rotatably connected to a reciprocating screw (224). The slider connected to the hopper body (21) is connected to the reciprocating screw (224). The two reciprocating screws (224) are coaxially fixedly connected to a first synchronous pulley, and the first synchronous belt (223) is connected between the two first synchronous pulleys. The bottom of the vertical screw conveyor is provided with a servo motor (31) for driving the screw conveyor blades (35) to rotate. The main shaft of the servo motor (31) and one of the reciprocating screws (224) are coaxially fixedly connected to a second synchronous pulley (222), and the second synchronous belt (221) is connected between the two second synchronous pulleys (222).

7. The alternating detection and pretreatment device for clean coal ash content as described in claim 4, characterized in that, The reciprocating hopper mechanism (2) also includes a material feeding rotating component (26), which is horizontally and rotatably arranged at the bottom discharge position of the hopper body (21).

8. The alternating detection and pretreatment device for clean coal ash content as described in claim 7, characterized in that, The material feeding rotating component (26) includes a central shaft and a shovel. The central shaft is horizontally rotatably connected to the bottom material inlet of the hopper body (21). Multiple shovels are provided and are circumferentially fixedly connected to the side wall of the central shaft.

9. The alternating detection and pretreatment device for clean coal ash content as described in claim 7, characterized in that, Both sides of the hopper body (21) are provided with rollers (24) coaxially connected to the material feeding rotating part (26), and a guide bar (25) that is in contact with the rollers (24) is fixedly connected to one side of the transverse guide rail (23).

10. A pretreatment method for alternating detection of ash content in clean coal, implemented using a pretreatment device for alternating detection of ash content in clean coal as described in any one of claims 1 to 9, characterized in that, The specific steps are as follows: Step 1: Evenly feed the crushed and qualified coal material into the top inlet of the splitter (1); The second step is to divide the coal into two samples using a splitter (1), discard one sample and keep the other sample. The third step is to collect the retained coal sample through the inclined guide box (341) and mix it by means of the stirring shaft (342); The fourth step is to transport the mixed coal to the top of the splitter (1) via a vertical screw conveyor.

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