Coal ash content detection system

Abstract

The utility model relates to the technical field of coal ash content detection, in particular to a coal ash content detection system which comprises sampling equipment, crushing equipment, tabletting equipment and ash content detection equipment, the sampling equipment is used for sampling a coal sample from a raw coal conveying belt so as to realize real-time online detection of ash content of raw coal on the raw coal conveying belt, and the coal sample sampled by the sampling equipment is conveyed into the crushing equipment; the crushing equipment is used for crushing a coal sample into pulverized coal with a preset particle size, and the pulverized coal obtained by the crushing equipment is conveyed into the tabletting equipment; the tabletting equipment is used for tabletting the pulverized coal to obtain coal cakes, and the coal cakes obtained by the tabletting equipment are conveyed into the ash content detection equipment; the ash content detection equipment is used for receiving the coal cake and detecting the ash content of the coal cake to obtain the ash content of the coal cake. As the thickness of the coal cake is fixed, the distance between the ash content detection equipment and the coal cake can be kept constant during each detection, and the detection precision is improved. Moreover, the surface of the coal cake is flat, light path judgment of ash content detection equipment is facilitated, and the detection precision is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal ash detection, in particular to a coal ash detection system. Background Art

[0002] Coal ash content refers to the mass fraction of oxide residue after coal is fully and completely burned at 815°C. Coal ash content is closely related to the calorific value of coal. In order to improve the utilization rate of coal, the ash content of coal must be strictly controlled.

[0003] At present, X-ray detection technology is used for coal ash detection, which uses an emission source to emit X-rays for coal ash detection. In the prior art, the X-ray emission source is generally arranged directly above the coal sample conveyor belt. Since the coal on the sample conveyor belt is scattered and the coal seam thickness is different, the detection accuracy of coal ash detection is affected. Utility Model Content

[0004] (I) The problem to be solved by the utility model is that the detection accuracy of coal ash content is affected due to the scattered distribution of coal on the sample conveyor belt and the different thickness of coal seams.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the embodiment of the utility model provides a coal ash detection system, including: a sampling device, a crushing device, a tablet pressing device and an ash detection device;

[0007] The sampling device is used to take coal samples from the raw coal conveyor belt, and the coal samples taken by the sampling device are conveyed to the crushing device;

[0008] The crushing device is used to crush the coal sample into coal powder of a preset particle size, and the coal powder obtained by the crushing device is transported to the tableting device;

[0009] The tableting device is used to tablet the coal powder and obtain coal cakes, and the coal cakes obtained by the tableting device are transported to the ash content detection device;

[0010] The ash content detection device is used to receive the coal cakes and perform ash content detection on the coal cakes to obtain the ash content of the coal cakes.

[0011] Furthermore, the crushing equipment includes a primary crushing equipment and a secondary crushing equipment;

[0012] The discharge end of the primary crushing equipment is connected to the feed end of the secondary crushing equipment;

[0013] The primary crushing equipment is used to crush the sample to be tested into coal particles of a preset particle size, and the secondary crushing equipment is used to receive the coal particles and crush the coal particles into coal powder of a preset particle size.

[0014] Furthermore, the particle size of the coal particles is less than or equal to 3 mm, and the particle size of the coal powder is less than or equal to 0.2 mm.

[0015] Further, the primary crushing equipment includes a primary crushing assembly and a secondary crushing assembly;

[0016] The primary crushing assembly includes a first crushing roller and a crushing plate;

[0017] The first crushing roller is spaced apart from the crushing plate, and a first crushing space is formed between the first crushing roller and the crushing plate;

[0018] The secondary crushing assembly includes a second crushing roller and a third crushing roller;

[0019] The second crushing roller is spaced apart from the third crushing roller, and a second crushing space is formed between the second crushing roller and the third crushing roller;

[0020] The second crushing space is communicated with the first crushing space, and a crushing ratio in the second crushing space is greater than a crushing ratio in the first crushing space.

[0021] Furthermore, the third crushing roller is located below the crushing plate, and the tail end of the crushing plate is located on the side of the central axis of the third crushing roller close to the second crushing roller, the central axis of the second crushing roller is located above the central axis of the third crushing roller, and the highest point of the second crushing roller is located above the tail end of the crushing plate, and the plane where the symmetry axis of the third crushing roller and the second crushing roller is located intersects with the path of the material after it leaves the crushing plate.

[0022] Furthermore, the distance between the first crushing roller and the crushing plate can be adjusted;

[0023] and / or;

[0024] The distance between the second crushing roller and the third crushing roller can be adjusted.

[0025] Furthermore, the ash content detection device includes a device body and a sample conveyor belt;

[0026] Along the conveying direction of the sample conveyor belt, the discharge end of the tablet pressing device and the device body are arranged in sequence;

[0027] The device body has a detection end, and the detection end of the device body is arranged toward the sample conveying belt.

[0028] Furthermore, the device body includes a box body and a detection probe;

[0029] The detection probe is arranged in the box;

[0030] The box body is erected above the sample conveyor belt, and a first through hole is opened at the lower end of the box body, the first through hole connects the inside of the box body with the outside, and the detection probe detects the ash content of the coal cakes on the sample conveyor belt through the first through hole.

[0031] Furthermore, a first protective film is provided at the first through hole.

[0032] Furthermore, the secondary pulverizing equipment is any one of a jet mill, an ultrasonic pulverizer and a diamond grinding disc.

[0033] Beneficial effects of the utility model:

[0034] The utility model provides a coal ash detection system, comprising: a sampling device, a crushing device, a tableting device and an ash detection device; the sampling device is used to take coal samples from a raw coal conveyor belt, and the coal samples taken by the sampling device are conveyed to the crushing device; the crushing device is used to crush the coal samples into coal powder of a preset particle size, and the coal powder obtained by the crushing device is conveyed to the tableting device; the tableting device is used to tablet the coal powder and obtain coal cakes, and the coal cakes obtained by the tableting device are conveyed to the ash detection device; the ash detection device is used to receive the coal cakes and perform ash detection on the coal cakes to obtain the ash content of the coal cakes.

[0035] The sampling equipment directly takes coal samples from the raw coal conveyor belt, thereby realizing real-time online detection of the ash content of the raw coal on the raw coal conveyor belt. The crushing equipment cooperates with the tableting equipment to make the taken coal samples into coal cakes with a fixed thickness. In this way, the distance between the ash content detection equipment and the coal cakes can be kept constant during each detection, thereby improving the detection accuracy. Moreover, the surface of the coal cakes is flat, which is conducive to the optical path judgment of the ash content detection equipment, and can further improve the detection accuracy and the accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic diagram of the structure of a coal ash detection system provided by an embodiment of the utility model;

[0038] Figure 2 A three-dimensional diagram of a primary crushing device provided by an embodiment of the utility model;

[0039] Figure 3 A front view of a primary crushing device provided by an embodiment of the utility model;

[0040] Figure 4 A cross-sectional view of a primary crushing device provided by an embodiment of the utility model;

[0041] Figure 5 A three-dimensional diagram of a primary crushing assembly provided in an embodiment of the utility model;

[0042] Figure 6 A three-dimensional diagram of a secondary crushing assembly provided by an embodiment of the utility model;

[0043] Figure 7 A three-dimensional diagram of a disintegration assembly provided in an embodiment of the utility model;

[0044] Figure 8 A three-dimensional diagram of the main body of the ash content detection device provided by the embodiment of the utility model;

[0045] Fig. 9 A cross-sectional view of an ash equipment detection probe provided in an embodiment of the utility model.

[0046] Icons: 1- Sampling equipment;

[0047] 2-primary crushing equipment; 21-primary crushing assembly; 211-first crushing roller; 212-crushing plate; 2121-first crushing part; 2122-second crushing part; 213-first crushing space; 214-first driving member; 216-first sliding bearing; 217-first material blocking member; 2171-material blocking space; 22-secondary crushing assembly; 221-second crushing roller; 222-third crushing roller; 223-second crushing space; 224-second driving member; 226-slideway; 227-first distance adjusting member; 228-second distance adjusting member; 229-second sliding bearing; 23-dispersing assembly; 231-first dispersing member; 2311-first dispersing part; 2312-first dispersing slot; 232-second dispersing member; 2321-second dispersing part; 2322-second dispersing slot; 233-dispersing space;

[0048] 3- Secondary crushing equipment;

[0049] 4- Tablet pressing equipment;

[0050] 5-ash content detection equipment; 51-equipment body; 511-box; 512-detection probe; 513-first through hole; 514-first protective film; 52-sample conveyor belt. DETAILED DESCRIPTION

[0051] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0052] like Figures 1 to 9 As shown, an embodiment of the utility model provides a coal ash detection system, including: a sampling device 1, a crushing device, a tableting device 4 and an ash detection device 5; the sampling device 1 is used to take coal samples from a raw coal conveyor belt, and the coal samples taken by the sampling device 1 are conveyed to the crushing device; the crushing device is used to crush the coal sample into coal powder of a preset particle size, and the coal powder obtained by the crushing device is conveyed to the tableting device 4; the tableting device 4 is used to tablet the coal powder and obtain coal cakes, and the coal cakes obtained by the tableting device 4 are conveyed to the ash detection device 5; the ash detection device 5 is used to receive the coal cakes and perform ash detection on the coal cakes to obtain the ash content of the coal cakes.

[0053] The coal ash detection system provided in this embodiment includes a sampling device 1, a crushing device, a tableting device 4 and an ash detection device 5. Among them, the raw coal conveyor belt is used to convey raw coal, and the sampling device 1 is arranged beside or above the raw coal conveyor belt. The sampling device 1 is used to take the raw coal in the raw coal conveyor belt as a coal sample for subsequent ash detection. The coal sample taken by the sampling device 1 will be transported to the crushing device, and the crushing device will crush the coal sample taken by the sampling device 1 and obtain coal powder with a preset particle size. The coal powder is transported to the tableting device 4, and the tableting device 4 presses the coal powder into a coal cake with a preset thickness and a smooth surface. The coal cake obtained by the tableting device 4 will be transported to the ash detection device 5, and the ash detection device 5 can obtain the ash content of the raw coal in the raw coal conveyor belt by detecting the ash content of the coal cake. Since the thickness of the coal cake is fixed and the surface of the coal cake is flat, the detection accuracy of the ash detection device 5 can be improved, and the accuracy of the detection result can be improved.

[0054] Furthermore, in this embodiment, the sampling device 1 can be set up above the raw coal conveyor belt through a frame structure, so that coal samples can be taken from the raw coal conveyor belt for subsequent ash content detection. The sampling device 1 can use a manipulator to take the raw coal on the raw coal conveyor belt as a coal sample by grabbing, or the sampling device 1 can use a sampling spoon to take the raw coal on the raw coal conveyor belt as a coal sample by digging.

[0055] Optionally, in this embodiment, the coal ash detection system further includes a controller, which is electrically connected to the sampling device 1 and can control the sampling frequency of the sampler.

[0056] The coal ash detection system provided in this embodiment directly takes coal samples from the raw coal conveyor belt through the sampling device 1, thereby realizing real-time online detection of the ash content of the raw coal on the raw coal conveyor belt, and the crushing device cooperates with the tablet pressing device 4 to make the taken coal samples into coal cakes with a fixed thickness, so that the distance between the ash detection device 5 and the coal cake can be kept constant during each detection, thereby improving the detection accuracy. Moreover, the surface of the coal cake is flat, which is conducive to the optical path judgment of the ash detection device 5, and can further improve the detection accuracy and the accuracy of the detection results.

[0057] The coal ash detection system provided by the embodiment of the utility model is as follows: Figure 1 As shown, the crushing equipment includes a primary crushing equipment 2 and a secondary crushing equipment 3; the discharge end of the primary crushing equipment 2 is connected to the feed end of the secondary crushing equipment 3; the primary crushing equipment 2 is used to crush the sample to be tested into coal particles of a preset particle size, and the secondary crushing equipment 3 is used to receive the coal particles and crush the coal particles into coal powder of a preset particle size.

[0058] In this embodiment, the crushing equipment includes a primary crushing device 2 and a secondary crushing device 3, wherein the primary crushing device 2 is used for preliminary crushing of the coal sample, and the coal sample is crushed by the primary crushing device 2 to obtain coal particles. The coal particles obtained by the primary crushing device 2 are transported to the secondary crushing device 3, and the secondary crushing device 3 is used to crush the coal particles to obtain coal powder, which is transported to the subsequent tableting device 4 to obtain coal cakes.

[0059] In this embodiment, the coal sample is initially crushed by the primary crushing device 2, so that the particle size of the material transported to the secondary crushing device 3 is smaller, which can improve the preparation efficiency of coal powder and also avoid the problem that the coal sample particle size is too large and difficult to be processed by the secondary crushing device 3. The coal particles are crushed into coal powder by the secondary crushing device 3, which is conducive to the subsequent pressing of coal cakes, making the surface of the coal cakes smoother, thereby improving the detection accuracy.

[0060] Optionally, in the present embodiment, the discharge end of the primary crushing device 2 and the feed end of the secondary crushing device 3 can be connected by a conveying pipe, which has a simple structure; they can also be connected by a transmission device such as a conveyor belt, which can facilitate the control of the feed amount and the adjustment of the discharge particle size of the primary crushing device 2. The adjustment of the discharge particle size of the primary crushing device 2 is described below.

[0061] Optionally, in this embodiment, the secondary pulverizing device 3 is any one of a jet mill, an ultrasonic pulverizer and a diamond grinding disc.

[0062] For example, the secondary crushing equipment is an air flow mill, which converts compressed air or superheated steam into high-speed air flow through a nozzle. When the coal particles are fed into the crushing chamber through a feeder, they are sheared by the high-speed air flow. The strong impact and violent friction cause the coal particles to be crushed and obtain coal powder.

[0063] Preferably, in this embodiment, in order to improve the efficiency of coal powder preparation and to ensure that the surface of the subsequently prepared coal cakes is smooth and the thickness is uniform, the particle size of the coal particles is less than or equal to 3 mm, and the particle size of the coal powder is less than or equal to 0.2 mm.

[0064] The coal ash detection system provided by the embodiment of the utility model is as follows: Figures 2 to 7 As shown, the primary crushing equipment 2 includes a primary crushing component 21 and a secondary crushing component 22; the primary crushing component 21 includes a first crushing roller 211 and a crushing plate 212; the first crushing roller 211 and the crushing plate 212 are spaced apart, and a first crushing space 213 is formed between the first crushing roller 211 and the crushing plate 212; the secondary crushing component 22 includes a second crushing roller 221 and a third crushing roller 222; the second crushing roller 221 and the third crushing roller 222 are spaced apart, and a second crushing space 223 is formed between the second crushing roller 221 and the third crushing roller 222; the second crushing space 223 is connected to the first crushing space 213, and the crushing ratio in the second crushing space 223 is greater than the crushing ratio in the first crushing space 213.

[0065] In this embodiment, the primary crushing assembly 21 and the secondary crushing assembly 22 are arranged vertically. The primary crushing assembly 21 includes a first crushing roller 211 and a crushing plate 212, which are arranged at intervals, and a first crushing space 213 is formed between the first crushing roller 211 and the crushing plate 212. When in use, the material is put into the first crushing space 213, and the material is preliminarily crushed in the first crushing space 213 by mutual extrusion of the first crushing roller 211 and the crushing plate 212. The secondary crushing assembly 22 includes a second crushing roller 221 and a third crushing roller 222, which are arranged at intervals, and a second crushing space 223 connected to the first crushing space 213 is formed between the second crushing roller 221 and the third crushing roller 222. The product obtained in the first crushing space 213 falls into the second crushing space 223 under the action of gravity, and a product with a preset particle size is obtained in the second crushing space 223 by mutual extrusion of the second crushing roller 221 and the third crushing roller 222.

[0066] That is, in this embodiment, through the cooperation of the primary crushing assembly 21 and the secondary crushing assembly 22, coal particles with a particle size less than or equal to 3 mm can be finally produced.

[0067] Furthermore, the primary crushing device 2 further comprises a first driving member 214, a first reducer, a second driving member 224 and a second reducer. The first driving member 214 drives the first crushing roller to rotate through the first reducer, and the second driving member 224 drives the second crushing roller 221 to rotate through the second reducer.

[0068] In this embodiment, the crushing plate 212 has a first crushing part 2121 and a second crushing part 2122 connected to the first crushing part 2121, the first crushing part 2121 and the second crushing part 2122 are arranged at an angle, and the first crushing roller 211 is located between the angles of the first crushing part 2121 and the second crushing part 2122; wherein, the distance between the first crushing part 2121 and the first crushing roller 211 gradually decreases toward the direction approaching the second crushing part 2122, the distance between the second crushing part 2122 and the first crushing roller 211 gradually decreases toward the direction approaching the tail end of the crushing plate 212, and the distance between the first crushing part 2121 and the first crushing roller 211 is greater than the distance between the second crushing part 2122 and the first crushing roller 211.

[0069] When in use, the material can enter between the first crushing part 2121 and the first crushing roller 211, and between the second crushing part 2122 and the first crushing roller 211 from top to bottom in sequence, so that the material can be initially crushed in the first crushing space 213. In this process, since the distance between the first crushing part 2121 and the first crushing roller 211 gradually decreases toward the second crushing part 2122, the distance between the second crushing part 2122 and the first crushing roller 211 gradually decreases toward the tail end of the crushing plate 212, and the distance between the first crushing part 2121 and the first crushing roller 211 is greater than the distance between the second crushing part 2122 and the first crushing roller 211, therefore, when the material is crushed between the second crushing part 2122 and the first crushing roller 211, the particle size is smaller than the particle size of the material after being crushed between the first crushing part 2121 and the first crushing roller 211, so that the particle size of the material gradually becomes smaller after being crushed in the first crushing space 213, so as to achieve initial crushing of the material.

[0070] Furthermore, in this embodiment, the primary crushing assembly 21 further includes a first sliding bearing 216, which is used to realize an adjustable distance setting between the first crushing roller 211 and the crushing plate 212. Specifically, both ends of the first crushing roller 211 are connected with the first sliding bearing 216, and the first crushing roller 211 can be close to or away from the first crushing part 2121 under the action of the first sliding bearing 216, so as to fine-tune the distance between the first crushing roller 211 and the crushing plate 212, thereby adjusting the discharge particle size of the first crushing space 213.

[0071] The coal ash detection system provided by the embodiment of the utility model is as follows: Figures 2 to 7As shown, the third crushing roller 222 is located below the crushing plate 212, and the tail end of the crushing plate 212 is located on the side of the central axis of the third crushing roller 222 close to the second crushing roller 221, the central axis of the second crushing roller 221 is located above the central axis of the third crushing roller 222, and the highest point of the second crushing roller 221 is located above the tail end of the crushing plate 212, and the plane where the symmetry axis of the third crushing roller 222 and the second crushing roller 221 is located intersects with the path of the material after it leaves the crushing plate 212.

[0072] In this embodiment, the path of the material after it leaves the second crushing part 2122 extends in a parabolic shape. Since the central axis of the second crushing roller 221 is located above the central axis of the third crushing roller 222, and the highest point of the second crushing roller 221 is located above the tail end of the crushing plate 212, when the material enters the second crushing space 223 from the first crushing space 213, the highest point of the second crushing roller 221 can block the material, preventing the material from escaping from the second crushing space 223 from above the highest point of the second crushing roller 221, thereby ensuring that the material can complete secondary crushing in the second crushing space 223. At the same time, since the third crushing roller 222 is located below the crushing plate 212, and the tail end of the crushing plate 212 is located on the side of the central axis of the third crushing roller 222 close to the second crushing roller 221, when the material enters the second crushing space 223 from the first crushing space 213, it can be prevented from escaping from the second crushing space 223 from the side of the third crushing roller 222 away from the second crushing roller 221, thereby further ensuring that the material can complete secondary crushing in the second crushing space 223, thereby reducing material leakage. At the same time, since the plane of the symmetry axis of the third crushing roller 222 and the second crushing roller 221 intersects with the path of the material after it separates from the crushing plate 212, when the material separates from the second crushing part 2122, the material can fall between the second crushing roller 221 and the third crushing roller 222, so that the material can be crushed by the relative movement between the second crushing roller 221 and the third crushing roller 222, thereby improving the crushing efficiency of the material in the second crushing space 223.

[0073] Preferably, in this embodiment, a dispersing assembly 23 is further provided below the secondary crushing assembly 22, and the dispersing assembly 23 is provided with a dispersing space 233, and the dispersing space 233 is connected with the secondary crushing space. After the material is crushed in the second crushing space 223, it can enter the dispersing space 233 downward, so that the crushed material can be dispersed in the dispersing space 233 by the dispersing assembly 23, so that the particle size of the material dispersed in the dispersing space 233 is smaller than the particle size of the material in the second crushing space 223, thereby further improving the crushing ratio of the crushing device.

[0074] Specifically, in this embodiment, the disintegration assembly 23 includes a first disintegration piece 231 and a second disintegration piece 232. The first disintegration piece 231 is connected to the second crushing roller 221 by a transmission belt or a chain, so that the second crushing roller 221 can drive the first disintegration piece 231 to rotate; the second disintegration piece 232 is connected to the first disintegration piece 231 by a transmission belt or a chain, so that the first disintegration piece 231 can drive the second disintegration piece 232 to rotate. The disintegration space 233 is located at one end of the first disintegration piece 231 and the second disintegration piece 232 close to the second crushing space 223. Since the first dispersing piece 231 can drive the second dispersing piece 232 to rotate, the material entering the dispersing space 233 can be dispersed by the rotation of the first dispersing piece 231 and the second dispersing piece 232. In this process, since the dispersing space 233 is located at one end of the first dispersing piece 231 and the second dispersing piece 232 close to the second crushing space 223, when the material enters the dispersing space 233, the material will fall onto the first dispersing piece 231 and the second dispersing piece 232. During the rotation of the first dispersing piece 231 and the second dispersing piece 232, the first dispersing piece 231 and the second dispersing piece 232 will cause the material to move irregularly, thereby achieving the purpose of dispersing the material, thereby improving the crushing ratio of the crushing device.

[0075] Further, in the present embodiment, the first dispersing member 231 has a plurality of first dispersing portions 2311, which are arranged at intervals along the circumference of the first dispersing member 231 to define a plurality of first dispersing grooves 2312. The second dispersing member 232 has a plurality of second dispersing portions 2321, which are arranged at intervals along the circumference of the second dispersing member 232 to define a plurality of second dispersing grooves 2322. The first dispersing member 231 and the second dispersing member 232 are meshed for transmission, and at the meshing point between the first dispersing member 231 and the second dispersing member 232, any first dispersing portion 2311 abuts against the groove wall of a second dispersing groove 2322, and any second dispersing portion 2321 abuts against the groove wall of a first dispersing groove 2312.

[0076] When in use, on the second dispersing piece 232, the material dropped from the second crushing space 223 can fall along the first direction onto any second dispersing portion 2321 and into the second dispersing groove 2322 adjacent to the second dispersing portion 2321. Since there is a height difference between the second dispersing portion 2321 and the second dispersing groove 2322, the material can be made to move irregularly during the rotation of the second dispersing piece 232. The material discharged from the second crushing space 223 will be sticky and in the shape of a cake. Through the cooperation of the first dispersing piece 231 and the second dispersing piece 232, the material sticky and in the shape of a cake can be dispersed by the second dispersing part 2321. At the same time, in the meshing area between the first dispersing piece 231 and the second dispersing piece 232, the material sticky and in the shape of a cake can be dispersed by the relative movement of the first dispersing piece 231 and the second dispersing piece 232, or by the opposite movement of the first dispersing piece 231 and the second dispersing piece 232.

[0077] In this embodiment, the first crushing roller 211 and the first driving member 214 are belt-driven, the second crushing roller 221 and the first crushing roller 211 are belt-driven, the scattering assembly 23 and the second crushing roller 221 are belt-driven, and the third crushing roller 222 and the second driving member 224 are belt-driven. In this process, since the second crushing roller 221 and the first crushing roller 211 are belt-driven, when the first crushing roller 211 rotates, the first crushing roller 211 can drive the second crushing roller 221 to rotate, so that the first crushing roller 211 can drive the second crushing roller 221 to operate. At the same time, since the third crushing roller 222 and the second driving member 224 are belt-driven, and the breaking up component 23 and the second crushing roller 221 are belt-driven, the second driving member 224 can drive the third crushing roller 222 to operate, and the second crushing roller 221 can drive the breaking up component 23 to operate, so that the material can enter the first crushing space 213, the second crushing space 223 and the breaking up space 233 from top to bottom in turn, so as to complete the crushing of the material through the linkage relationship between the primary crushing component 21, the secondary crushing component 22 and the breaking up component 23.

[0078] Optionally, in this embodiment, the secondary crushing assembly 22 is provided with a slide 226, and the third crushing roller 222 can be close to or away from the second crushing roller 221 in the slide 226. The secondary crushing assembly 22 also includes a first distance adjustment member 227, one end of the first distance adjustment member 227 is against the end of the third crushing roller 222 away from the second crushing roller 221, and the third crushing roller 222 can be close to the second crushing roller 221 under the action of the first distance adjustment member 227.

[0079] In this embodiment (not shown in the drawings), the first distance adjusting member 227 may be a hydraulic cylinder, and the piston end of the hydraulic cylinder abuts against one end of the third crushing roller 222 away from the second crushing roller 221. Since one end of the first distance adjusting member 227 abuts against one end of the third crushing roller 222 away from the second crushing roller 221, and the third crushing roller 222 can approach the second crushing roller 221 under the action of the first distance adjusting member 227, the distance between the third crushing roller 222 and the second crushing roller 221 can be adjusted by the first distance adjusting member 227, so as to control the particle size of the material after crushing in the second crushing space 223. At the same time, since the above-mentioned primary crushing device 2 is not suitable for starting with material, the first distance adjusting member 227 can be used to move the third crushing roller 222 away from the second crushing roller 221 after each start-up, and then return to the preset position for controlling the particle size of the material, so as to release the remaining material between the third crushing roller 222 and the second crushing roller 221, so as to protect the above-mentioned primary crushing device 2.

[0080] Or, in this embodiment, if Figure 6 As shown, the first distance adjusting member 227 is a reset spring. The third crushing roller 222 can be moved closer to or away from the second crushing roller 221 in the slideway 226 under the action of the reset spring. One end of the reset spring abuts against one end of the third crushing roller 222 away from the second crushing roller 221, and the other end of the reset spring abuts against a side wall of the slideway 226 away from the third crushing roller 222. When the third crushing roller 222 moves in the slideway 226 away from the second crushing roller 221, the reset spring is compressed.

[0081] Specifically, since the third crushing roller 222 can approach or move away from the second crushing roller 221 in the slide 226, when the third crushing roller 222 and the second crushing roller 221 rotate relative to each other, the third crushing roller 222 will move away from the second crushing roller 221 under the squeezing effect of the material. In this way, it is possible to avoid blockage between the third crushing roller 222 and the second crushing roller 221 when the material is crushed in the second crushing space 223. At the same time, since one end of the return spring is against the end of the third crushing roller 222 away from the second crushing roller 221, and the other end of the return spring is against the side wall of the slide 226 away from the third crushing roller 222, when the third crushing roller 222 is away from the second crushing roller 221, the third crushing roller 222 can apply an extrusion force to the return spring, so that the return spring has a reaction force to push the third crushing roller 222 to approach the second crushing roller 221, so that the third crushing roller 222 can approach the second crushing roller 221 under the action of the return spring, so as to maintain the distance between the third crushing roller 222 and the second crushing roller 221, thereby ensuring the particle size of the material after crushing in the second crushing space 223 and ensuring the crushing ratio of the secondary crushing assembly 22.

[0082] Furthermore, in this embodiment, when the first distance adjusting member 227 is a return spring, the secondary crushing assembly 22 also includes a second distance adjusting member 228, and the third crushing roller 222 is against the second distance adjusting member 228 along one end close to the second crushing roller 221, and the third crushing roller 222 can be moved away from the second crushing roller 221 under the action of the second distance adjusting member 228.

[0083] Specifically, the second distance adjusting member 228 and the third crushing roller 222 are butted against each other by bolts. When the bolts are loosened, the third crushing roller 222 and the second distance adjusting member 228 can be loosened, so that the third crushing roller 222 can have a moving space to move close to the second crushing roller 221, so as to fine-tune the distance between the third crushing roller 222 and the second crushing roller 221, and ensure that the particle size of the material after crushing is guaranteed while ensuring that there is no blockage between the third crushing roller 222 and the second crushing roller 221.

[0084] Optionally, in this embodiment, the secondary crushing assembly 22 further includes a second sliding bearing 229, and both ends of the second crushing roller 221 are connected with the second sliding bearing 229, and the second crushing roller 221 can be close to or away from the third crushing roller 222 under the action of the second sliding bearing 229. When in use, the second crushing roller 221 can be further moved close to or away from the third crushing roller 222 by the second sliding bearing 229, so as to fine-tune the distance between the second crushing roller 221 and the third crushing roller 222, so as to control the particle size of the material after crushing in the second crushing space 223.

[0085] In this embodiment, it is preferred to adopt an embodiment in which the distance between the first crushing roller 211 and the crushing plate 212 is adjustable, and at the same time, the distance between the second crushing roller 221 and the third crushing roller 222 is adjustable.

[0086] Optionally, in this embodiment, the primary crushing assembly 21 also includes a first material blocking member 217, which is arranged at the end of the first crushing roller 211 away from the crushing plate 212, and the first material blocking member 217 is provided with a material blocking space 2171, which is located above the second crushing space 223, and the end of the first crushing roller 211 away from the crushing plate 212 is arranged in the material blocking space 2171.

[0087] In this embodiment, when the first crushing roller 211 rotates relative to the crushing plate 212, some material will be attached to the surface of the first crushing roller 211, and the material may fall off the first crushing roller 211 from the end of the first crushing roller 211 away from the crushing plate 212. Since the end of the first crushing roller 211 away from the crushing plate 212 is arranged in the material blocking space 2171 of the first material blocking member 217, and the material blocking space 2171 is located above the second crushing space 223, the first material blocking member 217 can block the material attached to the end of the first crushing roller 211 away from the crushing plate 212, so that the material can fall from the material blocking space 2171 into the second crushing space 223, thereby reducing the leakage rate of the material.

[0088] Furthermore, in this embodiment, an end of the first material stopper 217 away from the first crushing roller 211 is located at an end of the central axis of the second crushing roller 221 close to the third crushing roller 222 .

[0089] In this embodiment, since the end of the first material blocking member 217 away from the first crushing roller 211 is located at the end of the central axis of the second crushing roller 221 close to the third crushing roller 222, the material can be blocked by the first material blocking member 217 to the end of the central axis of the second crushing roller 221 close to the third crushing roller 222, so as to avoid the material from falling to the end of the central axis of the second crushing roller 221 away from the third crushing roller 222, thereby ensuring that the material can enter the second crushing space 223 and further reduce the leakage rate of the material.

[0090] The coal ash detection system provided by the embodiment of the utility model is as follows: Figure 1 and Figure 8 As shown, the ash content detection device 5 includes an equipment body 51 and a sample conveyor belt 52; along the conveying direction of the sample conveyor belt 52, the discharge end of the tablet pressing device 4 and the equipment body 51 are arranged in sequence; the equipment body 51 has a detection end, and the detection end of the equipment body 51 is arranged toward the sample conveyor belt 52.

[0091] In this embodiment, the ash content detection device 5 performs real-time online detection of the ash content of the coal cake by X-ray. The ash content detection device 5 includes a device body 51 and a sample conveyor belt 52. The coal cake obtained by the tableting device 4 is conveyed to the sample conveyor belt 52, and is conveyed to the position of the device body 51 by the sample conveyor belt 52, and the ash content of the coal cake is detected by the detection end of the device body 51. By setting the sample conveyor belt 52 to convey the coal cake, the conveying efficiency is high, and manual participation is reduced, thereby improving the intelligence of the coal ash content detection system.

[0092] In this embodiment, the tableting device 4 is mainly composed of a feeding component, a tablet press, a transmission component, etc. Among them, the coal powder produced by the secondary crushing device 3 is conveyed to the feeding component, which can be a conveyor belt. The feeding component supplies the coal powder to the tablet press, and the tablet press presses the coal powder into sheets to obtain coal cakes under the drive of the transmission component. The coal cakes are discharged from the discharge end of the tableting device 4 to the sample conveyor belt 52 and conveyed to the device body 51 of the ash detection device 5 for ash detection.

[0093] The coal ash detection system provided by the embodiment of the utility model is as follows: Figure 8 and 9 As shown, the device body 51 includes a box body 511 and a detection probe 512; the detection probe 512 is arranged in the box body 511; the box body 511 is erected above the sample conveyor belt 52, and a first through hole 513 is opened at the lower end of the box body 511, and the first through hole 513 connects the inside of the box body 511 with the outside, and the detection probe 512 detects the ash content of the coal cake on the sample conveyor belt through the first through hole 513.

[0094] In this embodiment, the device body 51 includes a box body 511 and a detection probe 512. The interior of the box body 511 is hollow, and the interior of the box body 511 is used to accommodate the detection probe 512 and some other electronic equipment, so as to avoid the detection probe 512 from colliding with the coal cake when in use, and to protect the detection probe 512 to a certain extent. In addition, arranging the detection probe 512 inside the box body 511 can also prevent the operator's health from being affected by X-rays. The box body 511 is erected above the sample conveyor belt 52, and a first through hole 513 is opened at the lower end of the box body 511, and the above-mentioned detection end is formed at the first through hole 513. The detection probe 512 detects the ash content of the coal cake on the sample conveyor belt through the first through hole 513.

[0095] Optionally, in this embodiment, only a supporting structure may be provided to set up the detection probe 512 above the sample conveyor belt 52 , which can also achieve the purpose of detecting the ash content of the coal cakes on the sample conveyor belt 52 .

[0096] In this embodiment, the detection probe 512 includes a light tube and a detector. The light tube is used to emit X-rays. The X-rays pass through the first through hole 513 and hit the coal cakes on the sample conveyor belt 52. The detector is used to receive the scattered X-rays to obtain the ash content of the coal cakes.

[0097] The coal sample is made into coal cakes by the crushing device and the tablet pressing device 4. The coal cakes have a smooth surface, which can help the detector to receive scattered X-rays, improve the detection accuracy, and make the detection result more accurate.

[0098] The coal ash detection system provided by the embodiment of the utility model is as follows: Fig. 9As shown, a first protective film 514 is provided at the first through hole 513 .

[0099] In this embodiment, a first protective film 514 is provided at the first through hole 513 to isolate the interior of the box 511 from the outside, thereby preventing external dust and other impurities from entering the box 511 and affecting the normal operation of the detection probe 512 and other equipment.

[0100] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0101] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0102] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coal ash detection system, characterized in that: include: Sampling equipment (1), crushing equipment, tableting equipment (4) and ash content detection equipment (5); The sampling device (1) is used to take coal samples from the raw coal conveyor belt, and the coal samples taken by the sampling device (1) are conveyed to the crushing device; The crushing device is used to crush the coal sample into coal powder with a preset particle size, and the coal powder obtained by the crushing device is transported to the tableting device (4); The tablet pressing device (4) is used to tablet the coal powder and obtain coal cakes, and the coal cakes obtained by the tablet pressing device (4) are transported to the ash content detection device (5); The ash content detection device (5) is used to receive the coal cakes and perform ash content detection on the coal cakes to obtain the ash content of the coal cakes.

2. The coal ash detection system according to claim 1, characterized in that: The crushing equipment comprises a primary crushing equipment (2) and a secondary crushing equipment (3); The discharge end of the primary crushing device (2) is connected to the feed end of the secondary crushing device (3); The primary crushing device (2) is used to crush the sample to be tested into coal particles of a preset particle size, and the secondary crushing device (3) is used to receive the coal particles and crush the coal particles into coal powder of a preset particle size.

3. The coal ash detection system according to claim 2, characterized in that: The particle size of coal particles is less than or equal to 3 mm, and the particle size of coal powder is less than or equal to 0.2 mm.

4. The coal ash detection system according to claim 2, characterized in that: The primary crushing device (2) comprises a primary crushing assembly (21) and a secondary crushing assembly (22); The primary crushing assembly (21) comprises a first crushing roller (211) and a crushing plate (212); The first crushing roller (211) and the crushing plate (212) are arranged at an interval, and a first crushing space (213) is formed between the first crushing roller (211) and the crushing plate (212); The secondary crushing assembly (22) comprises a second crushing roller (221) and a third crushing roller (222); The second crushing roller (221) and the third crushing roller (222) are arranged at an interval, and a second crushing space (223) is formed between the second crushing roller (221) and the third crushing roller (222); The second crushing space (223) is connected to the first crushing space (213), and a crushing ratio in the second crushing space (223) is greater than a crushing ratio in the first crushing space (213).

5. The coal ash detection system according to claim 4, characterized in that: The third crushing roller (222) is located below the crushing plate (212), and the tail end of the crushing plate (212) is located on the side of the central axis of the third crushing roller (222) close to the second crushing roller (221), the central axis of the second crushing roller (221) is located above the central axis of the third crushing roller (222), and the highest point of the second crushing roller (221) is located above the tail end of the crushing plate (212), and the plane where the symmetry axis of the third crushing roller (222) and the second crushing roller (221) is located intersects with the path of the material after it leaves the crushing plate (212).

6. The coal ash detection system according to claim 4, characterized in that: The distance between the first crushing roller (211) and the crushing plate (212) can be adjusted; and / or; The distance between the second crushing roller (221) and the third crushing roller (222) can be adjusted.

7. The coal ash detection system according to claim 2, characterized in that: The ash content detection device (5) comprises a device body (51) and a sample conveyor belt (52); Along the conveying direction of the sample conveyor belt (52), the discharge end of the tablet pressing device (4) and the device body (51) are arranged in sequence; The device body (51) has a detection end, and the detection end of the device body (51) is arranged toward the sample conveying belt (52).

8. The coal ash detection system according to claim 7, characterized in that: The device body (51) comprises a box (511) and a detection probe (512); The detection probe (512) is arranged in the box (511); The box body (511) is erected above the sample conveyor belt (52), and a first through hole (513) is opened at the lower end of the box body (511), and the first through hole (513) connects the inside of the box body (511) with the outside, and the detection probe (512) detects the ash content of the coal cakes on the sample conveyor belt through the first through hole (513).

9. The coal ash detection system according to claim 8, characterized in that: A first protective film (514) is provided at the first through hole (513).

10. The coal ash detection system according to claim 2, characterized in that: The secondary pulverizing equipment is any one of a jet mill, an ultrasonic pulverizer and a diamond grinding disc.

Images