Crushing, screening and sample preparation equipment for coal detection

Abstract

The invention relates to the field of coal sampling, and discloses crushing, screening and sample preparation equipment for coal detection, which comprises a homogeneous division mechanism positioned on a chain type reciprocating mechanism, a trigger rack structure matched with an overhead rack, an extension traction frame and a rotating shaft structure of the extension traction frame, and is used for distributing and conveying coal samples to be divided; the division driving mechanism is positioned on the bottom rack, is embedded into the sliding table in a matched manner and is used for driving the plurality of homogeneous division mechanisms to perform division extraction; and the discharge output mechanism is positioned on the chain type reciprocating mechanism. The homogeneous division mechanism is driven by a chain type reciprocating mechanism and circularly moves on a closed-loop slide way, and uninterrupted continuous operation is achieved. Samples are input from the feeding hopper, mixed, divided, residual material discharging and reset to receive new materials, the whole process is automatic, the sample preparation efficiency is remarkably improved, the multiple sets of homogeneous division mechanisms bear different batches of samples at the same time, a multi-batch and multi-state parallel processing mode is formed, the single-time operation period is shortened, and the high-frequency sample preparation requirement is met.

Description

Technical Field

[0001] This invention relates to the field of coal mining and processing technology, specifically to a crushing, screening, and sample preparation device for coal testing. Background Technology

[0002] Coal is a carbon-rich, solid, combustible organic sedimentary rock formed primarily from plant residues through peatification and coalification, and also contains a certain amount of minerals. Coal-fired power plants sample, prepare, and analyze coal samples to obtain coal quality parameters for trade settlement and to guide production utilization. Mechanical sampling equipment is widely used in coal-fired power plants, and the coal samples collected should be representative.

[0003] Manual sampling, mixing, and reduction operations account for a high proportion, and single-batch operations are time-consuming and cannot be carried out continuously. Manual stirring or simple mechanical mixing is prone to particle stratification (such as density differences causing coarse particles to sink). Reduced sample representativeness is insufficient. Manual reduction (quartering method) or fixed ratio reducers cannot flexibly adjust the sampling amount and are easily affected by the operator's experience. Equipment residue contaminates subsequent samples, requiring frequent shutdowns for cleaning. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a crushing and screening sample preparation device for coal testing, which solves the four major defects of traditional coal sample preparation processes: low efficiency of manual operation, uneven mixing leading to representativeness deviation, uncontrollable reduction accuracy, and cross-contamination of equipment residues.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a coal testing crushing and screening sample preparation device, comprising: The bottom frame is used to fix the structure of the crushing, screening and sample preparation equipment for coal testing. The mid-mounted rack is located on the bottom rack and is used to fix the chain drive structure; The top frame is located on the middle frame and is used to fix the input structure of the crushed coal sample to be tested; The chain reciprocating mechanism is located on the central frame and works with the closed-loop slide rail of the central frame to form a closed-loop reciprocating conveying and traction structure. The homogeneous reduction mechanism is located on the chain reciprocating mechanism, and is used in conjunction with the trigger rack structure of the top frame, the extension traction frame, and the rotating shaft structure of the extension traction frame to distribute and transport the coal sample to be reduced. The reduction drive mechanism is located on the bottom frame and works with the embedded slide to drive multiple homogeneous reduction mechanisms for reduction extraction; The discharge output mechanism is located on the chain reciprocating mechanism, and is used in conjunction with the bidirectional output shaft and the extended sliding top contact bar structure to drive multiple homogeneous reduction mechanisms to circulate and discharge the remaining material after reduction. The slitting conveyor is located on the bottom frame and is used to transport the slitting sample to be tested.

[0006] Preferably, the central frame is fixed to the top of the bottom frame, and the closed-loop slide is arranged opposite to the inner wall of the central frame. The top frame is fixed to the top of the central frame, and the trigger rack structure is arranged opposite to the inner wall of the top frame. A feeding hopper structure is provided on one side of the top of the top frame. The chain reciprocating mechanism is distributed in the closed-loop slide of the central frame. The homogenization and reduction mechanism consists of multiple sets and is distributed on the chain reciprocating mechanism. The reduction drive mechanism is arranged opposite to the central frame. The discharge output mechanism is located on the side of the chain reciprocating mechanism away from the feeding hopper structure of the top frame. The reduction conveyor is located at the bottom of the bottom frame.

[0007] Preferably, the chain reciprocating mechanism includes reciprocating chains and bidirectional output shafts that are relatively distributed. The reciprocating chains are relatively embedded in the closed-loop slide of the central frame. The extended traction frames are equidistantly distributed on the chain members of the reciprocating chains, and the rotating shaft structure is located on the outside of the extended traction frames. The outer surface of the rotating shaft structure of the extended traction frames is provided with a relative locking strip structure. The reciprocating chain is provided with synchronous sprockets distributed on both sides.

[0008] Preferably, the homogenization and reduction mechanism includes a concentrating pool and an arc-shaped bottom cover. The bottom of the concentrating pool has relatively distributed arc-shaped openings. Traction hangers are fixed on both sides of the concentrating pool. The concentrating pool rotates on the rotating shaft structure of the extended traction frame via the traction hangers and is embedded in the central frame. The inner wall of the traction hanger is provided with opposing top bar structures. A relatively distributed polygonal sleeve is rotatably mounted inside the concentrating pool. The outer ring of the polygonal sleeve is provided with circumferentially distributed sleeve structures, and the outer wall of the sleeve structure is provided with an extension bar structure. An extension arm is slidably embedded inside the sleeve structure of the polygonal sleeve. An inclined stirring bar is connected between the extension arms. Traction arms are provided on both sides of the arc-shaped bottom cover and rotate relative to each other at the bottom of the collection tank, which can close the arc-shaped opening at the bottom of the collection tank. A linkage gear is fixed at the rotating end of the traction arm structure. Side-mounted slides are fixed at the bottom of both sides of the collection tank. The embedded slide is embedded and slides on the bottom wall of the collection tank and slides in the side-mounted slides through the two side sliding shafts. A retaining spring structure is embedded between the embedded slide and the inner wall of the side-mounted slides. A conical push cylinder structure is provided at the top of the embedded slide and can extend into the collection tank. Side-mounted slides are fixed on both sides of the collection tank.

[0009] Preferably, the splitting drive mechanism includes a side frame, which is fixed to the bottom of the side wall of the central frame. A trapezoidal traction table is fixed to the inner wall of the side frame and extends into the bottom frame, while being on the motion trajectory of the embedded slide.

[0010] Preferably, the emission output mechanism includes a dual-shaft sleeve, which is fitted onto a bidirectional output shaft. The dual-shaft sleeve has relatively distributed traction rods fixed on its outer side and located on the displacement trajectory of the top contact strip structure of the extended sliding shaft.

[0011] Preferably, the reciprocating chain has locking strips distributed on its chain members, which can be embedded into the outer ring of the synchronous sprocket.

[0012] Preferably, the bidirectional output shafts are in two sets and are arranged side by side on a synchronous sprocket on one side, and the gears at both ends of the bidirectional output shafts mesh with each other.

[0013] Preferably, a retaining ring is embedded between the extension arm and the inner wall of the sleeve structure.

[0014] Preferably, the side slide is slidably mounted on the bottom wall of the side slide and can be embedded in the side slide. At the same time, a snap ring structure is connected between the side slide and the inner wall of the side slide. The top of the extension slide is provided with a rack structure with two opposing sides, which meshes with the linkage gear of the arc-shaped bottom cover traction arm. The top contact strip structure of the extension slide is provided on the outer side wall of the extension slide.

[0015] This invention provides a crushing, screening, and sample preparation device for coal testing. It has the following beneficial effects: 1. This invention possesses continuous and efficient operation capabilities: the homogenization and reduction mechanism is driven by a chain reciprocating mechanism, circulating and displacing on a closed-loop slide to achieve uninterrupted continuous operation. The sample is input from the hopper → mixed → reduced → residual material discharge → reset to receive new material, all fully automated, significantly improving sample preparation efficiency. Multiple sets of homogenization and reduction mechanisms can simultaneously handle different batches of samples, forming a multi-batch, multi-state parallel processing mode, shortening the single operation cycle, and suitable for high-frequency sample preparation needs; 2. This invention improves sample uniformity and reduction accuracy: Triggered self-stirring, when the centralized pool is displaced, the extension bar of the polygonal sleeve collides with the trigger rack of the top frame, driving the polygonal sleeve to rotate, which in turn drives the extension arm and the inclined stirring bar to forcibly mix the sample. The extension arm retracts when it contacts the pool wall and pops out when it detaches through the snap ring structure, automatically adapting to the centralized pool space to ensure no dead corners in the stirring, improve the mixing uniformity, and ensure uniform particle distribution of the sample from the source, avoiding reduction deviation; 3. This invention is a purely mechanical automated control: it relies on the physical collision between the fixed rack and the multi-angled frame to drive the stirring, without the need for an additional motor. After the embedded slide table contacts the inclined surface of the trapezoidal traction table, it is lifted. The purely mechanical linkage opens the shrinking hole. The centrifugal force when the chain turns causes the top contact bar of the extension slide rod to collide with the stationary traction top rod, automatically opening the cover and discharging the material. This reduces the failure points of electrical components, is suitable for coal dust environments, has a long service life and low maintenance costs. All moving parts (such as the embedded slide table, extension slide plate, and arc-shaped bottom cover) are reset by spring clips to ensure that the mechanism automatically returns to its position after each operation, ensuring the continuity of the cycle. 4. This invention features a modular structure design: bottom / middle / top racks are stacked in layers, clearly dividing functional areas (power layer, operation layer, input layer), which facilitates disassembly and maintenance. The chain drive, mixing, reduction, and discharge modules are coupled through mechanical interfaces, and can be replaced in case of failure (e.g., damage to a single homogenization reduction mechanism does not affect the overall operation). 5. This invention has the ability to optimize resources and energy consumption: the emission output mechanism automatically clears the residual material at the chain turning section, avoiding sample residue from contaminating the next batch, while reducing manual cleaning costs. A single bidirectional output shaft synchronously drives the chains on both sides, with concentrated power and efficient transmission. Each function is triggered by the displacement of the mechanism, without the need for an additional power supply device. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the main structure of the present invention. Figure 1 ; Figure 2 This is a three-dimensional schematic diagram of the main structure of the present invention. Figure 2 ; Figure 3 This is a three-dimensional schematic diagram of the main structure of the present invention. Figure 3 ; Figure 4 This is a three-dimensional schematic diagram of the main structure of the present invention. Figure 4 ; Figure 5 This is a schematic diagram of the structural combination of the bottom frame, the middle frame, and the top frame of the present invention; Figure 6 This is a schematic diagram of the installation state of the chain reciprocating mechanism and the homogeneous reduction mechanism of the present invention. Figure 7 This is a schematic diagram of the chain reciprocating mechanism of the present invention; Figure 8 This is a schematic diagram of the extended traction frame structure of the present invention; Figure 9 This is a schematic diagram of the homogeneous reduction mechanism of the present invention; Figure 10 This is a schematic diagram of the internal structure of the homogeneous reduction mechanism of the present invention; Figure 11This is a schematic diagram of the side structure installation of the homogeneous reduction mechanism of the present invention; Figure 12 This is a schematic diagram of the reduction drive mechanism of the present invention; Figure 13 This is a schematic diagram of the emission output mechanism of the present invention.

[0017] Among them, 1. Bottom frame; 2. Middle frame; 3. Top frame; 4. Chain reciprocating mechanism; 5. Homogenization and reduction mechanism; 6. Reduction and reduction drive mechanism; 7. Discharge output mechanism; 8. Reduction and reduction conveyor; 41. Reciprocating chain; 42. Extension traction frame; 43. Synchronous sprocket; 44. Bidirectional output shaft; 51. Centralized pool; 52. Traction hanger; 53. Multi-angle sleeve; 54. Extension arm; 55. Arc-shaped bottom cover; 56. Side slide one; 57. Embedded slide table; 58. Side slide two; 59. Extension slide; 61. Side frame; 62. Trapezoidal traction table; 71. Double-shaft sleeve; 72. Traction top rod. Detailed Implementation

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see the appendix Figure 1 -Appendix Figure 4This invention provides a coal crushing and screening sample preparation device, comprising: a bottom frame 1 for fixing the structure of the coal crushing and screening sample preparation device; a middle frame 2 located on the bottom frame 1 for fixing the chain drive structure; and a top frame 3 located on the middle frame 2 for fixing the input structure of the crushed coal sample to be tested. The middle frame 2 is fixed to the top of the bottom frame 1, and a closed-loop slide is arranged opposite to the inner wall of the middle frame 2. The top frame 3 is fixed to the top of the middle frame 2, and a trigger rack structure is arranged opposite to the inner wall of the top frame 3. A [further details about the top frame 3 are missing]. The equipment includes a hopper structure. The chain reciprocating mechanism 4 is distributed within the closed-loop slide of the central frame 2. Multiple homogenization and reduction mechanisms 5 are distributed on the chain reciprocating mechanism 4. The reduction drive mechanism 6 is positioned opposite to the central frame 2. The discharge output mechanism 7 is located on the side of the chain reciprocating mechanism 4 away from the hopper structure of the top frame 3. The reduction conveyor 8 is located at the bottom of the bottom frame 1 and is used to convey the sample to be tested after reduction. This equipment is mainly for sample preparation and extraction operations after coal crushing. The overall equipment operating structure is constructed through superposition... The bottom frame 1, middle frame 2, and top frame 3 are fixed in place. Crushed coal samples are fed into the hopper at the top of the top frame 3. The closed-loop slide structure inside the middle frame 2 restricts the driving direction of the chain reciprocating mechanism 4, forming a closed-loop reciprocating traction path. This drives multiple sets of distributed homogenizing and reducing mechanisms 5 to move back and forth along the closed-loop path. Samples added from the hopper sequentially enter the multiple sets of homogenizing and reducing mechanisms 5. The homogenizing and reducing mechanisms 5, receiving samples sequentially, form a multi-batch, multi-state sample carrying mode, facilitating subsequent testing. The displacement of the homogenizing and reducing mechanisms 5 is synchronized. The uniform mixing preparation before the reduction is carried out synchronously with the trigger rack structure of the top frame 3. When the sample reaches the reduction drive mechanism 6 installed at the bottom of the middle frame 2, it will be reduced and extracted in sequence. Then, it will be circulated and transported to the position of the discharge output mechanism 7 by the chain reciprocating mechanism 4. The discharge output mechanism 7 will drive each set of homogenization reduction mechanism 5 to discharge the remaining material inside. Finally, it will circulate to the feed hopper position of the top frame 3 to carry out a new round of reduction operation. The test sample reduced by the homogenization reduction mechanism 5 through the reduction drive mechanism 6 is received by the reduction conveyor 8 and transported in a centralized manner.

[0020] Please see the appendix Figure 1 -Appendix Figure 8A chain reciprocating mechanism 4 is located on the central frame 2 and works in conjunction with the closed-loop slide rail of the central frame 2 to form a closed-loop reciprocating conveying and traction structure. The chain reciprocating mechanism 4 includes reciprocating chains 41 and bidirectional output shafts 44 that are relatively distributed. The reciprocating chains 41 are relatively embedded and movable within the closed-loop slide rail of the central frame 2. The extended traction frame 42 is equidistantly distributed on the chain members of the reciprocating chains 41, and the rotating shaft structure is located on the outside of the extended traction frame 42. The outer surface of the rotating shaft structure of the extended traction frame 42 is provided with a relative locking strip structure. The reciprocating chain 41 is provided with synchronous sprockets 43 distributed on both sides. The chain members of the reciprocating chain 41 are provided with locking strip structures that can be embedded into the outer ring locking slots of the synchronous sprockets 43. The bidirectional output shafts 44 are in two sets and are distributed side by side on one side of the synchronous sprocket 43. The gears at both ends of the bidirectional output shaft 44 mesh with each other. First, the chain reciprocating mechanism 4 includes two sets of reciprocating chains 41, which are distributed on the closed-loop slides on both sides of the inner wall of the central frame 2, forming a reciprocating traction structure under a closed-loop trajectory. The reciprocating chain 41 is equipped with multiple sets of extended traction frames 42 for traction using its own hinged chain structure. The extended traction frames 42 are close to each other. The synchronous sprockets 43 mounted on both sides of the reciprocating chain 41 are engaged with the locking structure of the chain members of the reciprocating chain 41 using their own outer ring locking slots. By driving the bidirectional output shaft 44 mounted on one side of the synchronous sprocket 43 to rotate, the synchronous sprocket 43 can drive the locking structure of the reciprocating chain 41 to move, so that the reciprocating chain 41 operates as a whole for traction, and drives the close-approaching extended traction frames 42 and their respective traction homogeneous reduction mechanisms 5 to move back and forth in a closed-loop trajectory.

[0021] Please see the appendix Figure 1 -Appendix Figure 11The homogenization reduction mechanism 5 is located on the chain reciprocating mechanism 4, and works in conjunction with the trigger rack structure of the top frame 3, the extended traction frame 42, and the rotating shaft structure of the extended traction frame 42 to distribute and transport the coal sample to be reduced. The homogenization reduction mechanism 5 includes a collection pool 51 and an arc-shaped bottom cover 55. The bottom of the collection pool 51 is provided with relatively distributed arc-shaped openings. Traction hangers 52 are fixed on both sides of the collection pool 51. The collection pool 51 rotates on the rotating shaft structure of the extended traction frame 42 through the traction hangers 52 and is embedded in the central frame 2. The inner wall of the traction hangers 52 is provided with opposing top bar structures. The collection pool 51 has relatively distributed polygonal sleeves 53 rotating inside. The outer ring of the polygonal sleeves 53 is provided with circumferentially distributed sleeve structures. The structure includes an extension strip on the outer wall of the sleeve structure. An extension arm 54 is slidably embedded inside the sleeve structure of the polygonal sleeve 53. An inclined stirring strip connects the two extension arms 54. Traction arms are provided on both sides of the arc-shaped bottom cover 55, rotating relative to each other at the bottom of the collection tank 51, and can close the arc-shaped opening at the bottom of the collection tank 51. A linkage gear is fixed to the rotating end of the traction arm structure. Side-mounted slides 56 are fixed to the bottom of both sides of the collection tank 51. An embedded slide 57 is slidably embedded in the bottom wall of the collection tank 51 and slides within the side-mounted slides 56 via two sliding shafts. A retaining spring structure is embedded between the embedded slide 57 and the inner wall of the side-mounted slides 56. A conical pusher structure is provided at the top of the embedded slide 57, which can extend to the collection tank. Inside pool 51, side-mounted slides 58 are fixed on both sides of the central pool 51. A retaining spring is embedded between the extension arm 54 and the inner wall of the sleeve structure. The side-mounted slide 58 slides on the bottom wall of the side-mounted slide 58 and can be embedded in the side-mounted slide 58. At the same time, a retaining spring structure is connected between the side-mounted slide 58 and the inner wall of the side-mounted slide 58. The top of the extension slide 59 is provided with a rack structure with opposite sides, which meshes with the linkage gear of the traction arm of the arc-shaped bottom cover 55. The top contact strip structure of the extension slide 59 is provided on the outer side wall of the extension slide 59. The central pool 51 included in the multiple sets of homogeneous reduction mechanisms 5 are connected to the corresponding extension traction frames 42 distributed on both sides through the traction hangers 52 fixed on both sides. The central pool 51 is sleeved on the extension traction frame 42 by the traction hangers 52 on both sides. On the rotating shaft structure of the guide frame 42, when the concentrator 51 is displaced to the upper and lower straight areas of the reciprocating chain 41 by the traction hanger 52, the relative top bar structure installed on the inner wall of the rotating groove of the traction hanger 52 will match the relative clamping bar structure installed on the outer wall of the rotating shaft of the extension traction frame 42, making the traction hanger 52 unable to rotate along the extension traction frame 42, thereby driving the concentrator 51 to always maintain a vertical bearing state. The arc-shaped openings on both sides of the bottom of the concentrator 51 are closed by two sets of opposite arc-shaped bottom covers 55, forming a bearing structure. The coal sample input from the feed hopper will be poured into the reciprocating concentrator 51 in sequence and supported by the arc-shaped bottom covers 55. The polygonal sleeve 53 installed on the inner wall of the concentrator 51 forms a wheel-type traction seat structure.The outer ring of the sleeve structure embeds a set of extension arms 54, and inclined stirring bars for mixing are fixed between the corresponding extension arms 54 on both sides. When the centralized tank 51 is pulled and displaced along the internal area of ​​the top frame 3 by the chain reciprocating mechanism 4, the extension bars on the outside of the multiple sleeve structures of the polygonal sleeve 53 will reciprocate to touch the key end of the trigger rack structure on the inside of the top frame 3, driving the polygonal sleeve 53 configured in each centralized tank 51 to rotate inside the centralized tank 51. The extension arms 54 of the sleeve structure of the polygonal sleeve 53 will follow the polygonal sleeve 53 to perform circumferential displacement. When a set of extension arms 54 contacts the two sides of the centralized tank 51, the extension arms 54 will be embedded into the sleeve structure of the polygonal sleeve 53, and when they are detached from the two sides of the centralized tank 51... The sleeve structure extends outward under the springback of the retaining spring installed inside the sleeve structure, thereby allowing the extension arm 54 to be extended outward according to the internal space of the concentration tank 51. This, combined with the inclined stirring bar, mixes and agitates the test samples carried in the concentration tank 51, driving the samples inside each concentration tank 51 to mix evenly, thus improving the particle uniformity of the subsequent reduction. When the concentration tank 51 reaches the curved part of the reciprocating chain 41, it disengages from the trigger rack structure of the top frame 3, simultaneously ending the uniform mixing preparation before reduction by the homogenization reduction mechanism 5. An embedded slide 57 is embedded in the bottom wall of the concentration tank 51, moving up and down via the side slides 56 installed on both sides of the concentration tank 51. The conical pusher installed on the top of the embedded slide 57 interacts with the reduction drive mechanism. Before contact, component 6 will adhere to the bottom wall of the pool 51, forming a supporting bottom wall together with the pool 51 and the arc-shaped bottom cover 55. The arc-shaped bottom cover 55 can be attached to both sides of the pool 51 using traction arms distributed on its two sides. The traction arms can rotate along the side wall of the pool 51, thereby driving the arc-shaped opening at the bottom of the pool 51 to open. The rotation shaft of the traction arm of the arc-shaped bottom cover 55 is equipped with a synchronously driven linkage gear. The side slides 58 attached to both sides of the pool 51 have an extension slide 59 embedded inside. The extension slide 59 can mesh with the linkage gears of the traction arms of the arc-shaped bottom cover 55 on both sides through the opposing rack structure attached to the top. When the extension slide 59 descends along the side slide 58, the opposing rack structure will drive the traction arms of the arc-shaped bottom cover 55 to move towards the center. The two sides unfold, thereby controlling the opening and closing of the arc-shaped bottom cover 55 at the bottom of the collection pool 51. When the collection pool 51 disengages from the trigger rack of the top frame 3 and ends mixing, it will be pulled by the reciprocating chain 41 to the lower straight area of ​​the reciprocating chain 41 until it reaches the position of the reduction drive mechanism 6. It will then contact the reduction drive mechanism 6 in sequence, triggering the homogenization reduction mechanism 5 to perform extraction and reduction. When the collection pool 51 is pulled by the reciprocating chain 41 to the trapezoidal traction table 62, the inclined structure of the trapezoidal traction table 62 contacts the bottom of the continuously displacing embedded slide 57 and guides it to the top wall of the trapezoidal traction table 62. At this time, the embedded slide 57 will be lifted by the guide of the trapezoidal traction table 62 and lifted along the side slide 56 into the interior of the collection pool 51.The conical pusher at the top of the side-mounted slide 56 is pushed into the collection tank 51 and detaches from the bottom wall of the collection tank 51. At this time, a set of reduction output holes are formed at the bottom center of the collection tank 51, causing the mixed sample inside the collection tank 51 to be reduced and dropped sequentially. The width of the top surface of the trapezoidal traction table 62 can be adjusted to change the number of samples reduced by the homogeneous reduction mechanism 5 each time. Until the embedded slide 57 disengages from the trapezoidal traction table 62, the snap ring structure inside the side-mounted slide 56 drives the embedded slide 57 to descend and reset, automatically closing the reduction output holes and stopping the reduction. At the same time, the operation can be carried out without stopping the machine. In this state, the reduction operation is performed sequentially. The extension slide 59, continuously displacing along the curved section of the reciprocating chain 41, will disengage from the traction rod 72 using the maximum diameter of its arc-shaped displacement, thus stopping the continuous reverse descent of the extension slide 59. Meanwhile, the retaining spring structure within the side carriage 58 uses its rebound force to drive the extension slide 59 back up and reset. The arc-shaped bottom cover 55, also pulled by the rising rack of the extension slide 59, rotates again and closes the bottom arc-shaped opening of the collection tank 51. The collection tank 51 then returns to the top frame 3 along the closed-loop trajectory, automatically starting a new round of reduction operation.

[0022] Please see the appendix Figure 1 -Appendix Figure 12 The reduction drive mechanism 6 is located on the bottom frame 1 and works in conjunction with the embedded slide 57 to drive multiple homogenization reduction mechanisms 5 for reduction extraction. The reduction drive mechanism 6 includes a side frame 61, which is fixed to the bottom of the side wall of the middle frame 2. A trapezoidal traction platform 62 is fixed to the inner wall of the side frame 61 and extends into the bottom frame 1, simultaneously positioned on the movement trajectory of the embedded slide 57. The side frames 61 included in each of the two sets of reduction drive mechanisms 6 are fixed to both sides of the middle frame 2, while the trapezoidal traction platform 62 installed inside the side frame 61 extends into the bottom frame 1 and is located on the displacement trajectory line of the embedded slide 57. When the collection pool 51 is pulled to the trapezoidal traction platform 62 by the reciprocating chain 41, the inclined structure of the trapezoidal traction platform 62 contacts the bottom of the continuously displacing embedded slide 57, and... Guided to the top wall of the trapezoidal traction table 62, the embedded slide 57 is lifted by the trapezoidal traction table 62 and lifted along the side slide 56 to the inside of the collection pool 51. The conical pusher at the top of the side slide 56 is pushed into the collection pool 51 and detached from the bottom wall of the collection pool 51. At this time, a set of reduction output holes are formed at the bottom center of the collection pool 51, which drives the mixed sample inside the collection pool 51 to be reduced and dropped in sequence. The width of the top surface of the trapezoidal traction table 62 can be adjusted to change the number of samples reduced by the homogeneous reduction mechanism 5 each time. Until the embedded slide 57 is detached from the contact of the trapezoidal traction table 62, the snap ring structure inside the side slide 56 drives the embedded slide 57 to descend and reset, and automatically closes the reduction output holes and stops the reduction. At the same time, the reduction operation is carried out in sequence without stopping the machine.

[0023] Please see the appendix Figure 1 -Appendix Figure 13 The discharge output mechanism 7 is located on the chain reciprocating mechanism 4, and works in conjunction with the bidirectional output shaft 44 and the top contact bar structure of the extension slide bar 59 to drive multiple homogenizing reduction mechanisms 5 to cyclically discharge the remaining material after reduction. The discharge output mechanism 7 includes a double-shaft sleeve 71, which is sleeved and stationary on the bidirectional output shaft 44. The outer side of the double-shaft sleeve 71 is fixed with relatively distributed traction top rods 72, which are located on the displacement trajectory of the top contact bar structure of the extension slide bar 59. The reciprocating chain 41 pulls the mechanism until it reaches the bend on the other side of the reciprocating chain 41. At this point, multiple homogenizing reduction mechanisms 5 that have completed reduction will sequentially contact the discharge output mechanism 7. The double-shaft sleeve 71 included in the discharge output mechanism 7 is mounted on both On the bidirectional output shafts 44 arranged in parallel, a fixed stationary state is formed. The traction rod 72 added to the outside of the double shaft sleeve 71 is on the displacement trajectory of the extension slide bar 59. When the concentrator 51 begins to rise and turn along the curved part on the other side of the reciprocating chain 41, the top contact bar structure added to the outside of the extension slide bar 59 will contact the traction rod 72. The stationary traction rod 72 will generate a reverse thrust, driving the extension slide bar 59 to automatically descend along the side slide bar 58. Using the rack structure on both sides, the oppositely arranged arc-shaped bottom cover 55 is driven to open to both sides at the same time, opening the arc-shaped opening at the bottom of the concentrator 51, driving the residual material in the concentrator 51 to be discharged from the concentrator 51, and emptying the inside of the concentrator 51.

[0024] Working Principle: This equipment is mainly used for sample preparation and extraction after coal crushing. The overall equipment structure is fixed by a bottom frame 1, a middle frame 2, and a top frame 3 installed in a stacked manner. The crushed coal sample can be fed into the hopper at the top of the top frame 3. The closed-loop slide structure installed inside the middle frame 2 can limit the driving traction direction of the chain reciprocating mechanism 4 to form a closed-loop reciprocating traction route, driving multiple sets of distributed homogenizing and reducing mechanisms 5 to move back and forth along the closed-loop route. The sample added to the hopper is distributed into the multiple sets of homogenizing and reducing mechanisms 5. The homogenizing and reducing mechanisms 5 that receive the sample in sequence form a multi-batch, multi-state sample carrying mode, which facilitates subsequent testing. The displacement of the homogenizing and reducing mechanisms 5 is coordinated with the top frame 3. The trigger rack structure synchronously performs uniform mixing preparation before the reduction, until it reaches the reduction drive mechanism 6 installed at the bottom of the central frame 2. At this time, it will synchronously and sequentially reduce and extract a portion of the sample, which is then circulated and transported to the position of the discharge output mechanism 7 by the chain reciprocating mechanism 4. The discharge output mechanism 7 sequentially drives each set of homogenizing reduction mechanisms 5 to discharge the remaining residue inside, and finally circulates to the feed hopper position of the top frame 3 to perform a new round of reduction operation. The test sample reduced by the homogenizing reduction mechanism 5 through the reduction drive mechanism 6 is received by the reduction conveyor 8 and transported centrally. First, the chain reciprocating mechanism 4 includes two sets of reciprocating chains 41, which are distributed on the closed-loop slides on both sides of the inner wall of the central frame 2 to form a reciprocating traction structure under the closed-loop trajectory. The reciprocating chain 41 utilizes its own hinged chain structure to install multiple sets of extended traction frames 42, which are close together. Synchronous sprockets 43 mounted on both sides of the reciprocating chain 41 engage with the locking structures of the reciprocating chain 41 using their outer ring clamps. By driving the bidirectional output shaft 44 mounted on one side of the synchronous sprocket 43 to rotate, the synchronous sprocket 43 drives the locking structures of the reciprocating chain 41 to shift, causing the reciprocating chain 41 to operate as a whole, and driving the close-fitting extended traction frames 42 and their respective homogeneous reduction mechanisms 5 to move back and forth along a closed-loop trajectory. The concentrated pools 51 contained in each of the multiple sets of homogeneous reduction mechanisms 5 are connected to the corresponding extended traction frames distributed on both sides via traction hangers 52 fixed on both sides. The traction frame 42 is connected, and the collection pool 51 is sleeved on the rotating shaft structure of the extension traction frame 42 by the traction hangers 52 on both sides. When the collection pool 51 is displaced to the upper and lower straight areas of the reciprocating chain 41 by the traction hangers 52, the relative top bar structure installed on the inner wall of the rotating groove of the traction hanger 52 will match the relative locking bar structure installed on the outer wall of the rotating shaft of the extension traction frame 42, so that the traction hanger 52 cannot rotate along the extension traction frame 42, thereby driving the collection pool 51 to always maintain a vertical load-bearing state. The arc-shaped openings on both sides of the bottom of the collection pool 51 are closed by two sets of opposite arc-shaped bottom covers 55, forming a load-bearing structure. The coal sample input from the feed hopper will be poured into the reciprocating collection pool 51 in sequence and supported by the arc-shaped bottom covers 55.The polygonal sleeves 53 installed on the inner wall of the centralized pool 51 form a rotary traction seat structure. A set of extension arms 54 are embedded in the outer ring of the sleeve structure, and inclined stirring bars for mixing are fixed between the corresponding extension arms 54 on both sides. When the centralized pool 51 is pulled and displaced along the inner area of ​​the top frame 3 by the chain reciprocating mechanism 4, the extension bars installed on the outer sides of the multiple sleeve structures of the polygonal sleeves 53 will reciprocate to contact the key ends of the trigger rack structure installed on the inner side of the top frame 3, driving each set of polygonal sleeves 53 configured in the centralized pool 51 to rotate inside the centralized pool 51. The extension arms 54 of the sleeve structure of the polygonal sleeves 53 will follow the polygonal sleeves 53 in circumferential displacement. When a set of extension arms 54 contacts both sides of the centralized pool 51... The extension arm 54 is embedded in the sleeve structure of the polygonal sleeve 53. When it detaches from both sides of the concentrator 51, it extends out of the sleeve structure under the spring return of the retaining spring installed inside the sleeve structure. This allows the extension arm 54 to be adjusted synchronously according to the internal space of the concentrator 51. It also works with the inclined stirring bar to mix and agitate the test samples carried in the concentrator 51, driving the samples in each group of concentrator 51 to be mixed evenly, thereby improving the particle uniformity of the subsequent reduction. When the concentrator 51 reaches the bend of one side of the reciprocating chain 41, it will detach from the trigger rack structure of the top frame 3, simultaneously ending the uniform mixing preparation before reduction by the homogenization reduction mechanism 5. An embedded slide 57 is embedded in the bottom wall of the concentrator 51. The slide 56 moves up and down. The conical pusher cylinder installed on the top of the slide 57 will adhere to the bottom wall of the pool 51 before contacting the shrinking drive mechanism 6. Together with the pool 51 and the arc-shaped bottom cover 55, it forms a supporting bottom wall. The arc-shaped bottom cover 55 can be installed on both sides of the pool 51 using traction arms distributed on its two sides. The traction arms can rotate along the side wall of the pool 51, thereby driving the arc-shaped opening at the bottom of the pool 51 to open. The rotation shaft of the traction arm of the arc-shaped bottom cover 55 is equipped with a synchronous drive linkage gear. The side slides 58 installed on both sides of the pool 51 have an extension slide bar 59 embedded inside. The extension slide bar 59 can mesh with the linkage gears of the traction arms of the arc-shaped bottom cover 55 on both sides through the opposing rack structure installed at the top. When the extension slide bar As the 59 descends along the second side slide 58, the opposing rack structure drives the traction arms of the two arc-shaped bottom covers 55 to unfold to both sides, thereby controlling the opening and closing of the arc-shaped bottom covers 55 at the bottom of the concentration pool 51. When the concentration pool 51 disengages from the trigger rack of the top frame 3 and ends mixing, it will be pulled by the reciprocating chain 41 to the lower straight area of ​​the reciprocating chain 41 until it reaches the position of the reduction drive mechanism 6. It will then contact the reduction drive mechanism 6 in sequence, triggering the homogenization reduction mechanism 5 to perform extraction and reduction. The side frames 61 included in each of the two sets of reduction drive mechanisms 6 are fixed on both sides of the central frame 2, while the trapezoidal traction platform 62 installed inside the side frames 61 extends into the bottom frame 1 and is located on the displacement trajectory line of the embedded slide 57.When the collection pool 51 is pulled to the trapezoidal traction table 62 by the reciprocating chain 41, the inclined structure of the trapezoidal traction table 62 contacts the bottom of the continuously displacing embedded slide 57 and guides it to the top wall of the trapezoidal traction table 62. At this time, the embedded slide 57 will be lifted by the guide of the trapezoidal traction table 62 and lifted along the side slide 56 into the interior of the collection pool 51. The conical pusher at the top of the side slide 56 will be pushed into the collection pool 51 and detached from the bottom wall of the collection pool 51. At this time, a set of shrinkage output holes are formed at the bottom center of the collection pool 51, which drives the mixed sample inside the collection pool 51 to shrink and fall down in sequence. The width of the top surface of the trapezoidal traction table 62 can be adjusted. The degree of homogenization is adjusted to change the number of samples shrunk by the homogenization reduction mechanism 5 each time, until the embedded slide 57 disengages from the trapezoidal traction table 62. Then, the snap ring structure inside the side slide 56 drives the embedded slide 57 to descend and reset, automatically closing the reduction output hole and stopping the reduction. Simultaneously, the reduction operation is performed sequentially without stopping the machine. The reciprocating chain 41 pulls the displacement until it reaches the bend on the other side of the reciprocating chain 41. At this point, multiple homogenization reduction mechanisms 5 that have completed reduction will sequentially contact the discharge output mechanism 7. The discharge output mechanism 7 includes a double-shaft sleeve 71 mounted on two sets of parallel bidirectional output shafts 44 to form a fixed static state. The traction rod 72, added to the outside of the double-shaft sleeve 71, extends along the displacement trajectory of the slide rail 59. When the concentrator 51 begins to rise and turn along the curved section on the other side of the reciprocating chain 41, the top contact strip structure added to the outside of the slide rail 59 will contact the traction rod 72. The stationary traction rod 72 will generate a reverse thrust, driving the extension slide rail 59 to automatically descend along the side slide rail 58. Utilizing the rack structures on both sides, it drives the oppositely arranged arc-shaped bottom covers 55 to open simultaneously to both sides, opening the arc-shaped opening at the bottom of the concentrator 51, causing the residual material in the concentrator 51 to be discharged and the interior of the concentrator 51 to be emptied. The extended slide bar 59, continuously displacing along the curved section of the reciprocating chain 41, will disengage from the traction rod 72 by utilizing the maximum diameter of its arc-shaped displacement, thus stopping the continuous reverse descent of the extended slide bar 59. Meanwhile, the retaining spring structure within the side carriage 58 uses its rebound force to drive the extended slide bar 59 back up and reset. The arc-shaped bottom cover 55, also pulled by the rising rack of the extended slide bar 59, will rotate again and close the bottom arc-shaped opening of the collection tank 51. The collection tank 51 will then return to the top frame 3 along a closed-loop trajectory, automatically starting a new round of cutting operations. The cut and extracted raw materials will fall onto the cutting conveyor 8 and be output through it.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crushing, screening, and sample preparation device for coal testing, characterized in that, include: The bottom frame (1) is used to fix the structure of the crushing, screening and sample preparation equipment for coal testing; The middle rack (2) is located on the bottom rack (1) and is used to fix the chain drive structure; The top frame (3) is located on the middle frame (2) and is used to fix the input structure of the crushed coal sample to be tested; The chain reciprocating mechanism (4) is located on the central frame (2) and works with the closed-loop slide of the central frame (2) to form a closed-loop reciprocating conveying traction structure. The homogeneous reduction mechanism (5) is located on the chain reciprocating mechanism (4), and is used in conjunction with the trigger rack structure of the top frame (3), the extension traction frame (42), and the rotating shaft structure of the extension traction frame (42) to distribute and transport the coal sample to be reduced. The reduction drive mechanism (6) is located on the bottom frame (1) and is used in conjunction with the embedded slide (57) to drive multiple homogeneous reduction mechanisms (5) to perform reduction extraction; The discharge output mechanism (7) is located on the chain reciprocating mechanism (4), and is used in conjunction with the top contact bar structure of the bidirectional output shaft (44) and the extension slide bar (59) to drive multiple homogeneous reduction mechanisms (5) to circulate and discharge the remaining material after reduction. The reduction conveyor (8) is located on the bottom frame (1) and is used to convey the sample to be tested after reduction.

2. The coal testing crushing and screening sample preparation equipment according to claim 1, characterized in that, The middle frame (2) is fixed on the top of the bottom frame (1), and the closed-loop slide is arranged opposite to the inner wall of the middle frame (2). The top frame (3) is fixed on the top of the middle frame (2), and the trigger rack structure is arranged opposite to the inner wall of the top frame (3). A feeding hopper structure is provided on one side of the top of the top frame (3). The chain reciprocating mechanism (4) is distributed in the closed-loop slide of the middle frame (2). The homogenization reduction mechanism (5) consists of multiple sets and is distributed on the chain reciprocating mechanism (4). The reduction drive mechanism (6) is arranged opposite to the middle frame (2). The discharge output mechanism (7) is located on the side of the chain reciprocating mechanism (4) away from the feeding hopper structure of the top frame (3). The reduction conveyor (8) is located at the bottom of the bottom frame (1).

3. The coal testing crushing and screening sample preparation equipment according to claim 1, characterized in that, The chain reciprocating mechanism (4) includes a reciprocating chain (41) and a bidirectional output shaft (44) that are relatively distributed. The reciprocating chain (41) is relatively embedded in the closed-loop slide of the central frame (2). The extended traction frame (42) is equidistantly distributed on the chain members of the reciprocating chain (41), and the rotating shaft structure is located on the outside of the extended traction frame (42). The outer surface of the rotating shaft structure of the extended traction frame (42) is provided with a relative locking strip structure. The reciprocating chain (41) is provided with synchronous sprockets (43) distributed on both sides.

4. The coal testing crushing and screening sample preparation equipment according to claim 1, characterized in that, The homogenization reduction mechanism (5) includes a collection pool (51) and an arc-shaped bottom cover (55). The bottom of the collection pool (51) is provided with relatively distributed arc-shaped openings. Traction hangers (52) are fixed on both sides of the collection pool (51). The collection pool (51) rotates on the rotating shaft structure of the extension traction frame (42) through the traction hangers (52) and is embedded in the central frame (2). The inner wall of the traction hanger (52) is provided with relatively opposite top bar structures. The collection pool (51) has relatively distributed polygonal sleeves (53) rotating inside. The outer ring of the polygonal sleeve (53) is provided with circumferentially distributed sleeve structures, and the outer wall of the sleeve structure is provided with extension strip structures. An extension arm (54) is embedded and slidably inserted inside the sleeve structure of the polygonal sleeve (53). An inclined stirring bar is connected between the extension arms (54) on the side. Traction arms are provided on both sides of the arc-shaped bottom cover (55), and the traction arms rotate relative to each other at the bottom of the collection tank (51), and can close the arc-shaped opening at the bottom of the collection tank (51). A linkage gear is fixed at the rotating end of the traction arm structure. Side slides (56) are fixed at the bottom of both sides of the collection tank (51). The embedded slide (57) is embedded and slides on the bottom wall of the collection tank (51), and slides in the side slides (56) through the sliding shafts on both sides. A snap ring structure is embedded between the slide and the inner wall of the side slides (56). A conical push cylinder structure is provided at the top of the embedded slide (57), and can extend into the collection tank (51). Side slides (58) are fixed on both sides of the collection tank (51).

5. The coal testing crushing and screening sample preparation equipment according to claim 1, characterized in that, The shrinking drive mechanism (6) includes a side frame (61), which is fixed to the bottom of the side wall of the central frame (2). A trapezoidal traction table (62) is fixed to the inner wall of the side frame (61) and extends into the bottom frame (1), while being on the motion trajectory of the embedded slide (57).

6. The coal testing crushing and screening sample preparation equipment according to claim 1, characterized in that, The emission output mechanism (7) includes a dual-shaft sleeve (71) which is sleeved and stationary on the bidirectional output shaft (44). The outer side of the dual-shaft sleeve (71) is fixed with relatively distributed traction rods (72) and located on the displacement trajectory of the top contact strip structure of the extended slide bar (59).

7. The coal testing crushing and screening sample preparation equipment according to claim 3, characterized in that, The reciprocating chain (41) has a locking strip structure distributed on its chain members, which can be embedded into the outer ring of the synchronous sprocket (43).

8. The coal testing crushing and screening sample preparation equipment according to claim 3, characterized in that, The bidirectional output shaft (44) consists of two sets, which are arranged side by side on a synchronous sprocket (43) on one side, and the gears at both ends of the bidirectional output shaft (44) mesh with each other.

9. A coal testing crushing and screening sample preparation device according to claim 4, characterized in that, A retaining ring is embedded between the extension arm (54) and the inner wall of the sleeve structure.

10. A coal testing crushing and screening sample preparation device according to claim 4, characterized in that, The side slide 2 (58) slides on the bottom wall and can be embedded in the side slide 2 (58). At the same time, a snap ring structure is connected between the side slide 2 (58) and the inner wall of the side slide 2 (58). The top of the extension slide (59) is provided with a rack structure with opposite sides, which meshes with the linkage gear of the traction arm of the arc-shaped bottom cover (55). The top contact strip structure of the extension slide (59) is provided on the outer side wall of the extension slide (59).

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