Anti-blocking multi-stage division coal sampling machine

Abstract

The invention discloses an anti-blocking multistage division coal sampling machine, and relates to the anti-blocking field of coal sample preparation, the anti-blocking multistage division coal sampling machine comprises a sample preparation unit, the sample preparation unit is provided with a feed inlet, a crushing cavity and a discharge end; a first filter plate is arranged at the end, away from the feeding port, of the crushing cavity, and an anti-blocking unit is arranged on the side, away from the feeding port, of the first filter plate. The anti-blocking unit comprises a rotating assembly arranged on a crushing shaft of the sampling machine and a driven assembly corresponding to the rotating assembly; the driven assembly does linear reciprocating motion along with rotation of the rotating assembly, and bristles are arranged on the surface of the side, close to the filter plate, of the driven assembly. According to the coal sampling machine, the driven assembly is driven by the rotating assembly to reciprocate, so that the driven assembly continuously scrapes the filter plate along with the work of the coal sampling machine, and the scraping of the filter plate by the driven assembly is reflected in the transverse direction and the longitudinal direction, so that small-particle coal samples are helped to pass through the filter plate under the action of the bristles, and the coal samples are prevented from being agglomerated and adhered.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of coal sample preparation, and particularly relates to a multi-stage anti-blocking coal sample preparation machine. BACKGROUND

[0002] In the field of coal quality detection, the sample is the key basis for tracing the detection results of the coal sample, and the size reduction link of the 3mm to 0.2mm particle size interval is the core process for connecting the crushing of the coal sample and the final sample. However, in the size reduction process of the specific particle size interval, the existing coal sample preparation machine usually adopts the structure of filter plate screening and gravity size reduction. However, in actual application, the fine particles are easily attached to the filter plate screening holes, and continuously accumulate to cause blocking in the size reduction process, which cannot meet the demand of the power plant for rapid detection of multiple batches of incoming coal, and after blocking, the filter plate needs to be manually cleaned, which not only increases the labor intensity of the operator, but also easily causes the dust and impurities in the air to mix into the sample, thereby causing cross contamination.

[0003] Therefore, the present application provides a multi-stage anti-blocking coal sample preparation machine. SUMMARY

[0004] Therefore, the present application solves the technical problem that the fine particles are easily attached to the filter plate screening holes, and continuously accumulate to cause blocking in the size reduction process.

[0005] The above technical problem is solved by the following technical scheme: the present application provides a multi-stage anti-blocking coal sample preparation machine, which comprises a sample preparation unit, the sample preparation unit comprises a crushing shaft and a first filter plate, at least two groups of anti-blocking units are arranged in the sample preparation unit, and the anti-blocking units comprise a rotating assembly arranged on the crushing shaft and a passive assembly corresponding to the rotating assembly;

[0006] The passive assembly moves linearly along with the rotation of the rotating assembly, and a brush is arranged on one side surface of the passive assembly close to the first filter plate, so that the first filter plate is scraped when the passive assembly moves, thereby avoiding the blocking of the coal sample on the filter plate.

[0007] The anti-blocking units are symmetrically arranged at the center of the crushing shaft.

[0008] In a preferred embodiment of the multi-stage anti-blocking coal sample preparation machine, an inlet, a crushing cavity and an outlet are arranged on the sample preparation unit, and a fan is connected to one end of the crushing cavity, which is used to blow the crushed coal sample to the next link and remove the water in the coal sample.

[0009] In a preferred embodiment of the multi-stage anti-blocking coal sample preparation machine, a stretching blade is connected to the passive assembly, one end of the stretching blade away from the passive assembly is fixedly connected to the outlet, and the stretching blade moves along with the passive assembly and stretches and shrinks, thereby accelerating the output speed of the coal sample.

[0010] In a preferred embodiment of the multi-stage coal sample preparation device with anti-blocking function, the first crushing blade coaxial with the crushing shaft is arranged below the feeding port.

[0011] In a preferred embodiment of the multi-stage coal sample preparation device with anti-blocking function, the second crushing blade coaxial with the crushing shaft is arranged inside the crushing cavity, and the residual coal outlet is arranged below the crushing cavity.

[0012] In a preferred embodiment of the multi-stage coal sample preparation device with anti-blocking function, the second filter plate is arranged between the crushing blade and the second crushing blade.

[0013] In a preferred embodiment of the multi-stage coal sample preparation device with anti-blocking function, the rotating assembly comprises a rotating plate coaxial with the crushing shaft, and two groups of rotating rods symmetrically arranged on the rotating plate.

[0014] In a preferred embodiment of the multi-stage coal sample preparation device with anti-blocking function, the passive assembly comprises a fixed rod arranged on the filter plate, and a duckbill plate rotationally connected to the fixed plate, and the duckbill plate is provided with a passive rod on the side close to the rotating plate.

[0015] In a preferred embodiment of the multi-stage coal sample preparation device with anti-blocking function, the duckbill plate is provided with a U-shaped plate at an angle of 90° with the passive rod, the end of the U-shaped plate away from the duckbill plate is sleeved on a positioning rod arranged on a moving plate, and the discharge end shell is provided with a sliding groove for sliding of the moving plate.

[0016] In a preferred embodiment of the multi-stage coal sample preparation device with anti-blocking function, the moving plate is provided with a T-shaped plate, the bottom end of the T-shaped plate extends to the rotating rod, and does not reach the rotating range of the passive rod in the other group of rotating assemblies.

[0017] The beneficial effects of the present application are that the passive assembly is reciprocally moved by the rotating assembly, so that the passive assembly continuously scrapes the filter plate with the working of the coal sample preparation machine, and the scraping of the passive assembly on the filter plate is realized in the horizontal and vertical directions, so that the small particle coal sample is helped to pass through the filter plate under the action of the bristles, the coal sample is prevented from agglomeration and adhesion, the stretching blade is continuously stretched and reset while the passive assembly is reciprocally moved, the falling speed of the coal sample is accelerated, the coal sample is prevented from accumulating in the gap between the filter plate and the discharge port, the air circulation in the crushing cavity is realized, the function of the fan is maximized, the small particle coal sample is blown through the filter plate, and the working efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to make the technical solutions of the embodiments of the present application clearer, the drawings of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described in the following description only relate to some embodiments of the present application and are not a limitation on the present application. Among them:

[0019] Figure 1 The overall structural schematic diagram of the present application is shown;

[0020] Figure 2 The cross-sectional schematic diagram of the overall structure of the present application is shown;

[0021] Figure 3 For Figure 2 the enlarged schematic diagram at A in the middle;

[0022] Figure 4 The working state schematic diagram of the anti-blocking unit of the present application is shown Figure 1 ;

[0023] Figure 5 The working state schematic diagram of the anti-blocking unit of the present application is shown Figure 2 . DETAILED DESCRIPTION

[0024] In order for those skilled in the art to have a better understanding of the present application, the present application will be further described in detail below in conjunction with the specific embodiments and the drawings.

[0025] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions about the present application, but these terms can be changed according to the intention of those skilled in the art, precedents or new technologies in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meanings thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as simple names, but based on the meanings of the terms and the overall description of the present application.

[0026] With reference to Figures 1-3 , the present embodiment provides an anti-blocking multi-stage division coal sample preparation machine, which comprises a sample preparation unit 1, the sample preparation unit 1 comprises a crushing shaft 16 and a first filter plate 15, at least two groups of anti-blocking units 2 are arranged in the sample preparation unit 1, the anti-blocking unit 2 comprises a rotating assembly 21 arranged on the crushing shaft 16 of the sample preparation machine and a passive assembly 22 corresponding to the rotating assembly 21, the rotating assembly 21 drives the passive assembly 22 to move to realize reciprocating scraping of the filter plate, so as to avoid fine particle coal samples from adhering to the screening holes and blocking, and improve the discharging speed;

[0027] The passive component 22 reciprocates linearly with the rotation of the rotating component 21. The surface of the passive component 22 near the filter plate is provided with bristles. When the passive component 22 moves, it scrapes the filter plate to prevent the coal sample from clogging the filter plate. Real-time scraping replaces cleaning after clogging, thus avoiding clogging problems from the source, reducing the frequency of sample preparation machine shutdown for cleaning, and improving the efficiency and stability of coal sample preparation.

[0028] Two sets of anti-blocking units 2 are symmetrically arranged about the center of the crushing shaft 16. The two sets of anti-blocking units 2 operate synchronously with the crushing shaft 16, so that the crushing shaft 16 is balanced during rotation. This avoids shaft vibration or increased wear caused by eccentric load generated by one-sided anti-blocking unit 2, thus extending the service life of the equipment. The linear reciprocating motion areas of the two sets of passive components 22 complement each other, eliminating cleaning dead corners. The symmetrical layout also forms a certain functional redundancy. Even if one set of anti-blocking units 2 has a minor failure, the other set can still maintain the basic anti-blocking function, reducing the risk of equipment downtime.

[0029] The sample preparation unit 1 is equipped with a feed inlet 11, a crushing chamber 12 and a discharge end 13. One end of the crushing chamber 12 is connected to a blower 14, which is used to blow the crushed coal sample to the next stage and remove its moisture. During operation, coal is fed into the crushing chamber 12 through the feed inlet 11 for crushing, and the crushed coal sample enters the discharge end 13.

[0030] The coal sample with a diameter of 3 mm enters the crushing chamber 12, and after further crushing, the 0.2 mm coal sample passes through the first filter plate 15;

[0031] A stretching blade 17 is connected to the passive component 22. The end of the stretching blade 17 away from the passive component 22 is fixedly connected to the discharge end 13. The stretching blade 17 moves with the passive component 22 and stretches and contracts, accelerating the coal sample output speed. The stretching blade 17 is made of elastic or deformable materials, such as wear-resistant rubber or elastic metal sheets, and has bidirectional deformation capability of stretching and contraction. It can change its shape synchronously with the movement state of the passive component 22. When the passive component 22 moves away from the crushing shaft 16, the stretching blade 17 is stretched; when the passive component 22 moves closer to the crushing shaft 16, the stretching blade 17 is stretched. The extension blade 17 retracts and resets. During the deformation process, the extension blade 17 will continuously disturb the coal sample at the outlet side of the first filter plate 15, breaking the static accumulation state of fine particles. Its stretching action during stretching can expand the discharge channel space, and its rebound action during contraction will form a slight pushing force on the coal sample, thereby accelerating the passage and significantly improving the coal sample passing efficiency. By replacing the mode of simply relying on gravity for discharge with mechanical disturbance, the residence time of qualified coal samples at the outlet of the first filter plate 15 is reduced. The extension blade 17 directly utilizes the motion power of the passive component 22 without additional drive, forming an organic whole with the original anti-blocking unit 2.

[0032] Below the feed inlet 11, there is a first crushing blade 18 coaxial with the crushing shaft 16, which performs preliminary crushing of the coal and screens coal with a particle size of less than 3mm to enter the next step of processing.

[0033] The crushing chamber 12 is equipped with a second crushing blade 19 coaxial with the crushing shaft 16 to further crush coal with a particle size of less than 3mm to the required particle size. The crushing chamber 12 is equipped with an excess coal outlet, which discharges excess coal that cannot pass through the first filter plate 15 and does not need to be crushed further under the action of gravity, so as to avoid excessive coal accumulation in the crushing chamber 12, prevent equipment overload or reduction of crushing efficiency. Valves or regulating devices can be designed according to actual needs to control the speed and timing of excess coal discharge.

[0034] Reference Figures 1-5 As an optional embodiment, a second filter plate 110 is provided between the first crushing blade and the second crushing blade 19 for screening coal samples with qualified particle size.

[0035] The rotating assembly 21 includes a rotating plate 211 coaxial with the crushing shaft 16, and two sets of rotating rods 212 symmetrically arranged on the rotating plate 211. The lengths and installation angles of the two sets of rotating rods 212 are completely consistent to ensure the force balance during rotation.

[0036] The passive component 22 includes a fixed rod 221 mounted on the filter plate and a duckbill plate 222 rotatably connected to the fixed plate. A passive rod 223 is located on the side of the duckbill plate 222 closest to the rotating plate 211. The fixed rod 221 provides a stable mounting reference, ensuring the controllable movement trajectory of the duckbill plate 222. The duckbill plate 222 can rotate around the fixed rod 221 at a certain angle. The passive rod 223 extends outward from the side of the duckbill plate 222 closest to the rotating plate 211 and engages with the rotating rod 212 of the rotating component 21. When the crushing shaft 16 drives the rotating plate 211 to rotate... The rotating rod 212 on the rotating plate 211 rotates simultaneously and pushes the passive rod 223, transmitting the driving force of the rotating assembly 21 to the duckbill plate 222, causing it to swing around the fixed rod 221. When the rotating rod 212 pushes the passive rod 223, the duckbill plate 222 swings in one direction, and the bristles scrape the first filter plate 15. When the rotating rod 212 leaves the passive rod 223, the duckbill plate 222 swings in the opposite direction, completing one scraping cycle. The duckbill plates 222 on both sides will swing synchronously and alternately under the drive of the rotating rod 212, ensuring that the surface of the filter plate is subjected to balanced force and the scraping coverage is more comprehensive.

[0037] The duckbill plate 222 is provided with a U-shaped plate 224 forming a 90° angle with the passive rod 223. The end of the U-shaped plate 224 away from the duckbill plate 222 is sleeved on the positioning rod 225. The positioning rod 225 is set on the moving plate 226. The discharge end 13 housing is provided with a sliding groove 227 for the moving plate 226 to slide. The open end of the U-shaped plate 224 is sleeved on the positioning rod 225 and can slide freely along the axis of the positioning rod 225. The sliding groove 227 is opened at the corresponding position of the discharge end 13 housing, providing a linear motion track for the moving plate 226 and restricting the moving plate 226 to only move along a predetermined path. Assuming a sliding trajectory, when the rotating rod 212 pushes the passive rod 223, the duckbill plate 222 swings around the fixed rod 221. The U-shaped plate 224 at its end will drive the positioning rod 225 and the moving plate 226 to move linearly along the sliding groove 227 of the housing, so that the movement of the entire passive component 22 is limited to the preset linear trajectory. The 90° included angle design makes the force direction of the passive rod 223 and the sliding direction of the U-shaped plate 224 form a spatial perpendicular relationship, which not only ensures the effective transmission of the driving force of the rotating rod 212, but also cancels the lateral force, avoids movement deviation, and ensures the effective scraping of the filter plate by the bristles.

[0038] The movable plate 226 is provided with a T plate 228. The bottom end of the T plate 228 extends to the rotating rod 212, but does not reach the rotation range of the passive rod 223 in the other set of rotating components 21, so as to ensure stable contact with the rotating rod 212 and not enter the rotation range of the passive rod 223 in the other set of symmetrical anti-blocking units 2, so as to avoid interference between the two sets of structures during movement.

[0039] When the rotating rod 212 moves in a circular motion with the rotating plate 211, the end of the rotating rod 212 first contacts the longitudinal part of the T plate 228 and applies a pushing force. The T plate 228 transmits the pushing force to the moving plate 226, which drives the moving plate 226 to move in a straight line along the sliding groove 227, and then completes the scraping action through the positioning rod 225 and the U-shaped plate 224.

[0040] Since the two sets of anti-blocking units 2 are centrally symmetrically distributed, the length of the T-plate 228 is strictly limited to the range of movement on one side. When one side of the T-plate 228 contacts the rotating rod 212, its end maintains a safe distance from the passive rod 223 on the other side, avoiding structural collisions during bidirectional movement. Through the reasonable layout and size control of the T-plate 228, the power transmission efficiency is enhanced, and the movement interference between symmetrical structures is fundamentally avoided, making the overall operation of the anti-blocking unit 2 safer and more stable.

[0041] Reference Figures 1-5In some embodiments, a discharge port 111 is provided below the discharge end 13, and a stretching blade 17 is provided directly above the discharge port 111. The coverage area of ​​the stretching blade 17 should match the opening size of the discharge port 111. The reciprocating deformation of the stretching blade 17 directly above the discharge port 111 can directly generate a downward pushing force on the qualified coal sample passing through the first filter plate 15. The action of the stretching blade 17 when it contracts can break the adhesion of the coal sample at the edge of the discharge port 111, guide the coal sample to fall accurately into the discharge port 111, reduce residue, and at the same time reduce the bouncing or turning back of the coal sample inside the discharge end 13, shortening the discharge path.

[0042] The filter hole diameter of the second filter plate 110 is larger than that of the first filter plate 15. The second filter plate 110 pre-screens out coarse particles that do not require secondary crushing, so that the second crushing blade 19 can focus on the fine crushing of the coal sample in the target area. The two-stage screening forms a double check, reducing the risk of particle size loss due to local blockage of a single filter plate.

[0043] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A multi-stage coal sample preparation machine for preventing clogging, characterized in that: include, The sample preparation unit (1) includes a crushing shaft (16) and a first filter plate (15). The sample preparation unit (1) is provided with at least two anti-clogging units (2), including a rotating component (21) disposed on the crushing shaft (16) and a passive component (22) corresponding to the rotating component (21). The passive component (22) moves in a straight line reciprocating motion as the rotating component (21) rotates, and the passive component (22) has bristles on the side surface near the first filter plate (15) to scrape the first filter plate (15) when the passive component (22) moves, so as to prevent the coal sample from clogging the filter plate. The anti-blocking unit (2) is symmetrical about the crushing shaft (16).

2. The anti-clogging multi-stage coal sample preparation machine according to claim 1, characterized in that: The sample preparation unit (1) is provided with a feed inlet (11), a crushing chamber (12) and a discharge end (13). One end of the crushing chamber (12) is connected to a blower (14) for blowing the crushed coal sample to the next stage and removing its moisture.

3. The anti-clogging multi-stage coal sample preparation machine according to claim 2, characterized in that: The passive component (22) is connected to a stretching blade (17). The end of the stretching blade (17) away from the passive component (22) is fixedly connected to the discharge end (13). The stretching blade (17) moves with the passive component (22) and stretches and contracts, thereby accelerating the coal sample output speed.

4. The anti-clogging multi-stage coal sample preparation machine according to claim 3, characterized in that: Below the feed inlet (11) is a first crushing blade (18) coaxial with the crushing shaft (16).

5. The anti-clogging multi-stage coal sample preparation machine according to claim 4, characterized in that: The crushing chamber (12) is provided with a second crushing blade (19) coaxial with the crushing shaft (16), and a residual coal outlet is provided below the crushing chamber (12).

6. The anti-clogging multi-stage coal sample preparation machine according to claim 5, characterized in that: A second filter plate (110) is provided between the first crushing blade (18) and the second crushing blade (19).

7. The anti-clogging multi-stage coal sample preparation machine according to claim 6, characterized in that: The rotating assembly (21) includes a rotating plate (211) coaxial with the crushing shaft (16) and two sets of rotating rods (212) symmetrically arranged on the rotating plate (211).

8. The anti-clogging multi-stage coal sample preparation machine according to claim 7, characterized in that: The passive component (22) includes a fixed rod (221) disposed on the filter plate and a duckbill plate (222) rotatably connected to the fixed plate. The duckbill plate (222) has a passive rod (223) disposed on the side near the rotating plate (211).

9. The anti-clogging multi-stage coal sample preparation machine according to claim 8, characterized in that: The duckbill plate (222) is provided with a U-shaped plate (224) at a 90° angle to the passive rod (223). The end of the U-shaped plate (224) away from the duckbill plate (222) is sleeved on the positioning rod (225). The positioning rod (225) is set on the moving plate (226). The discharge end (13) housing is provided with a sliding groove (227) for the moving plate (226) to slide.

10. The anti-clogging multi-stage coal sample preparation machine according to claim 9, characterized in that: The movable plate (226) is provided with a T-plate (228), the bottom end of which extends to the rotating rod (212) but does not reach the rotation range of the passive rod (223) in another set of rotating components (21).

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