Device for automatic sampling and sample preparation of high-moisture coal

Abstract

The utility model relates to a device for automatic sampling and sample preparation of high-moisture coal. Comprising a coal elevator, a coal conveying belt connected with the tail end of the coal elevator and a coal using section arranged at the tail end of the coal conveying belt, a moisture online detector and a sampling machine are arranged above the front portion of the coal conveying belt, and the sampling machine is connected with a fine grinding machine through a secondary crushing and division unit. An outlet of the fine grinding machine is connected with a coal analyzer through a tablet press; the secondary crushing and division unit comprises a primary crushing and division part and a secondary crushing and division part; a plurality of circulation pieces for preventing coal from bonding are arranged on the sampling conveying belt between the sampling machine and the primary crushing and division part; the coal sampling system has the advantages that the labor intensity of sampling personnel is reduced, the coal sampling range is widened, the continuous operation of the sampling system can be realized while adhesion and blockage are prevented, the sampling uniformity and continuity are ensured, the coal sampling accuracy is improved, and a guarantee is provided for later coal use.

Description

Technical Field

[0001] The utility model relates to the field of coal detection, in particular to a device for automatic sampling of high-moisture coal. Background Art

[0002] The collection and preparation of coal samples is an important step in coal procurement and storage, and is the basis for coal quality inspection. Coal collected from outside must pass the coal quality inspection before it can be used. Currently, in many coal mines and coal washing plants, most of the coal sampling work is done manually. Affected by sampling tools, labor factors, etc., the representativeness of the coal samples collected is poor. In addition, although there are automatic sampling and preparation systems, coal samples with high moisture content have the problem of easy adhesion and clogging. For high-moisture coal, although it can be alleviated by adding equipment such as oscillators, the actual application effect is limited, and it cannot completely solve the problems of adhesion and clogging. Therefore, existing sampling devices are usually suitable for the collection and preparation of low-moisture coal samples. Utility Model Content

[0003] The utility model provides a device for automatically sampling high-moisture coal, which is used to solve the technical problems of easy adhesion and clogging during coal sampling.

[0004] The technical solution of the utility model is:

[0005] A device for automatic sampling of high-moisture coal comprises a coal hoist, a coal conveyor belt connected to the end of the coal hoist, and a coal-using section arranged at the end of the coal conveyor belt. An online moisture detector and a sampler are provided above the front of the coal conveyor belt. The sampler is connected to a fine grinder via a secondary crushing and shrinking unit, and the outlet of the fine grinder is connected to a coal analyzer via a tablet press. The secondary crushing and shrinking unit comprises a primary crushing and shrinking section and a secondary crushing and shrinking section. The sampling conveyor belt between the sampler and the primary crushing and shrinking section is provided with a number of flow parts to prevent coal from sticking.

[0006] The beneficial effects of the present invention are as follows: the present invention can monitor the moisture content of coal in real time by arranging an online moisture detector, and when the moisture content of the coal meets the detection requirements, sampling is performed through a sampling machine, and subsequent processing and analysis are performed; at the same time, by arranging a flow piece, the high-moisture coal sample on the sampling conveyor belt can be cleared to avoid blockage or adhesion.

[0007] Preferably, the end of the primary crushing and shrinking section is connected to the head end of the secondary crushing and shrinking section and the coal elevator respectively, and the end of the secondary crushing and shrinking section is connected to the fine grinder and the coal elevator respectively.

[0008] Preferably, the primary crushing and reducing section includes a primary crusher and a primary reducer, the inlet of the primary crusher is connected to the sampling conveyor belt, and the outlet of the primary reducer is connected to the head end of the secondary crushing and reducing section and the coal elevator through corresponding pairs of conveyor belts.

[0009] Preferably, the secondary crushing and reducing section includes a secondary crusher and a secondary reducer, the inlet of the secondary crusher is connected to the outlet of the primary reducer, and the outlet of the secondary reducer is connected to the fine grinder and the coal hoist through corresponding pairs of conveyor belts.

[0010] Preferably, a tee is provided between the tablet press and the coal analyzer, and the third end of the tee is connected to the coal hoist.

[0011] Preferably, the circulation part includes a motor and a linkage shaft, the linkage shaft includes a middle recessed section and raised sections on both sides, the raised section on one side is connected to the motor, and the raised section on the other side is connected to the bearing seat; the middle recessed section and the raised sections on both sides are an integrated structure; the recessed section and the raised section are respectively provided with anti-blocking plates.

[0012] Preferably, a coal flow detector is provided above the coal conveyor belt in front of the online moisture detector.

[0013] According to the above technical solution, a device for automatic sampling of high-moisture coal is made. By setting an online moisture detector, the moisture content of the coal in the coal conveyor belt can be detected. When the moisture content is too high, the sampler is not started. When the moisture content of the coal is not more than 25%, the sampler is started, thereby avoiding the problem that the moisture content of the coal is too high and affects the operation of the sampling equipment. The utility model is also provided with a circulation part that can realize the dredging of the high-moisture coal sample on the sampling conveyor belt to avoid the blockage or adhesion. Specifically, the circulation part described in the utility model includes a motor and a linkage shaft. The linkage shaft includes It includes a concave section in the middle and convex sections on both sides. When the motor is started, the anti-blocking plates run alternately, thereby preventing the problem of coal sticking and clogging; further, the utility model is provided with a diversion device at the rear of the primary crushing and shrinking section and the secondary crushing and shrinking section, which can reduce the excess coal and send it back to the coal conveyor belt, thereby achieving the purpose of saving coal; it has the advantages of reducing the labor intensity of sampling personnel, increasing the scope of coal sampling, and being able to achieve continuous operation of the sampling system while preventing sticking and clogging, ensuring uniform and continuous sampling, improving the accuracy of coal sampling, and providing guarantee for the subsequent use of coal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 It is a structural diagram of the circulation part of the utility model.

[0016] Numbers in the figure: 1. Coal elevator; 2. Coal conveyor belt; 3. Coal processing section; 4. Online moisture detector; 5. Sampler; 6. Fine grinder; 7. Tablet press; 8. Coal analyzer; 9. Primary crusher; 10. Primary reducer; 11. Sampling conveyor belt; 12. Secondary crusher; 13. Secondary reducer; 14. Motor; 15. Concave section; 16. Raised section; 17. Bearing seat; 18. Coal flow detector; 19. Anti-blocking piece. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention.

[0018] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0019] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate and simplify the description of the utility model and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating or implying relative importance.

[0020] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0021] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1 、2 As shown, the utility model is a device for automatic sampling of high-moisture coal, comprising a coal hoist 1, a coal conveyor belt 2 connected to the end of the coal hoist 1, and a coal using section 3 arranged at the end of the coal conveyor belt 2. An online moisture detector 4 and a sampler 5 are provided above the front of the coal conveyor belt 2. The sampler 5 is connected to a fine grinder 6 through a secondary crushing and shrinking unit, and the outlet of the fine grinder 6 is connected to a coal analyzer 8 through a tablet press 7; the secondary crushing and shrinking unit includes a primary crushing and shrinking part and a secondary crushing and shrinking part, and a plurality of flow parts are provided on the sampling conveyor belt 11 between the sampler 5 and the primary crushing and shrinking part to prevent coal from sticking. The present invention can effectively expand the sampling range of coal, and specifically can be used to sample coal with a moisture content of no more than 25%; when in use, the moisture content of the coal in the coal conveyor belt 2 is detected by the online moisture detector 4, and when the moisture content is no more than 25%, the sampler 5 can be started to sample the coal in the coal conveyor belt 2; when the above threshold is exceeded, the sampler 5 does not work; when the moisture content of coal is high, it is easy to cause adhesion and blockage. The present invention prevents the problem of coal adhesion and blockage by arranging a number of flow parts on the sampling conveyor belt 11; the flow parts can be conventional anti-coal blockage devices.

[0023] Furthermore, the end of the primary crushing and shrinking section is respectively connected to the head end of the secondary crushing and shrinking section and the coal elevator 1, and the end of the secondary crushing and shrinking section is respectively connected to the fine grinder 6 and the coal elevator 1. By providing a diverter structure at the end of the primary crushing and shrinking section, not only can the workload of the subsequent secondary crushing and shrinking section be reduced, but the sampled coal can also be recycled and reused, thereby saving resources. By providing a diverter structure at the end of the secondary crushing and shrinking section, not only can the workload of the subsequent fine grinder 6 be reduced, but the sampled coal can also be recycled and reused, thereby saving resources.

[0024] Furthermore, the primary crushing and reducing section includes a primary crusher 9 and a primary reducer 10, the inlet of the primary crusher 9 is connected to the sampling conveyor belt 11, and the outlet of the primary reducer 10 is connected to the head end of the secondary crushing and reducing section and the coal elevator 1 through corresponding pairs of conveyor belts.

[0025] Furthermore, the secondary crushing and reducing section includes a secondary crusher 12 and a secondary reducer 13, the inlet of the secondary crusher 12 is connected to the outlet of the primary reducer 10, and the outlet of the secondary reducer 13 is connected to the fine grinder 6 and the coal elevator 1 through corresponding pairs of conveyor belts.

[0026] Furthermore, a tee is provided between the tablet press 7 and the coal analyzer 8 , and the third end of the tee is connected to the coal hoist 1 .

[0027] Further, if Figure 2 As shown, the flow member includes a motor 14 and a linkage shaft. The linkage shaft includes a central recessed section 15 and two convex sections 16. The convex section on one side is connected to the motor 14, and the convex section on the other side is connected to the bearing seat 17. The central recessed section 15 and the convex sections 16 on both sides are an integrated structure. The recessed section 15 and the convex sections 16 are each provided with an anti-blocking piece 19. This arrangement enables the anti-blocking pieces 19 to alternately operate when the motor starts, thereby preventing coal from sticking and clogging.

[0028] Furthermore, a coal flow detector 18 is provided above the coal conveyor belt 2 in front of the online moisture detector 4 .

[0029] The working principle of the present invention includes the following steps: Step 1: Coal is lifted by a coal hoist 1 onto a coal conveyor belt 2 and then transported to a coal-using section 3 via the coal conveyor belt 2. During this process, an online moisture detector 4 detects the moisture content of the coal in the coal conveyor belt 2. The particle size of the coal entering the coal conveyor belt 2 is controlled to be less than 150 mm, and the coal seam thickness has a lower limit of 30 mm and an upper limit of 450 mm. Preferably, a coal flow detector 18 is installed above the coal conveyor belt 2 in front of the online moisture detector 4 to determine whether coal is entering and whether sampling and analysis are required. The online moisture detector 4 can be set to sample at different time intervals, with a minimum time interval of 2 seconds. The average value of the sampling results is simultaneously analyzed in real time. Step 2: The analysis results of the online moisture detector 4 determine whether the sampling machine 5 is operating. This determination can be performed manually or using a PLC automatic control system. If the moisture content of the analysis results of the online moisture detector 4 is greater than 25%, the program determines that the moisture content is too high and the sampling machine 5 is not operating. If the moisture content is not greater than 25%, the program determines that the sampling machine 5 is operating. Step 3: The sampling machine 5 can be programmed to perform sampling; the sampling time interval of the sampling machine 5 can be set by itself, and the interval is 3s to 600s. Step 4: The sample collected by the sampling machine 5 is sent to the primary crusher 9 for crushing; the coal particle size after crushing in the primary crusher 9 is less than 4mm; the sampling conveyor belt 11 is provided with a number of flow parts, which are arranged in the middle of the sampling conveyor belt 11; the anti-blocking piece 19 can be a bayonet-type structure, and is arranged in the form of three rows of bayonets, with the top of the bayonet being a sawtooth shape; during movement, the anti-blocking pieces 19 on both sides and the middle anti-blocking piece 19 move in opposite directions, that is: when the middle of the linkage shaft extends, the two sides of the linkage shaft move backward; when the middle of the linkage shaft moves backward, the two sides of the linkage shaft extend; this ensures that the logistics in the sampling conveyor belt 11 is in an unstable motion state, not only avoiding the adhesion of high-moisture coal samples on the wall of the sampling conveyor belt 11, but also effectively avoiding the expansion of high-moisture coal samples during transportation, thereby ensuring the continuous operation of the sampling system. Step 5: After the coal sample is crushed in the primary crusher 9, it is sent to the primary reducer 10 for reduction. Step 6: After the coal sample is reduced in the primary reducer 10, a portion of it enters the secondary crusher 12. The excess coal is returned to the coal conveyor belt 2 via the coal elevator 1 to be supplied to the coal processing section 3. Step 7: The coal particle size after the secondary crusher 12 is less than 2 mm. The crushed coal enters the secondary reducer 13 for reduction. A portion of the coal reduced in the secondary reducer 13 enters the fine grinder 6. The excess coal is returned to the coal conveyor belt 2 via the coal elevator 1 to be supplied to the coal processing section 3.Step nine: Grind the coal through the fine grinder 6 until the coal particle size is less than 0.2 mm, send the ground coal to the tablet press 7 to be pressed into tablets, and the analytical sample after tableting is sent to the coal analyzer 8 for analysis. The excess coal sample during the tableting process is returned to the coal conveyor belt 2 through the coal elevator 1 for use in the coal supply section 3.

[0030] The standard parts used in this application document can all be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field, which is common knowledge in this field. In addition, the utility model is mainly used to protect mechanical devices, so the utility model no longer explains the control method and circuit connection in detail. The peripheral controller mentioned in the specification can play a control role for the electrical components mentioned in this article, and the peripheral controller is a conventional known device.

[0031] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0032] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above are only preferred implementation methods of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the scope of protection of the present utility model.

Claims

1. A device for automatically sampling high-moisture coal, comprising a coal hoist (1), a coal conveyor belt (2) connected to the end of the coal hoist (1), and a coal-using section (3) arranged at the end of the coal conveyor belt (2), characterized in that: An online moisture detector (4) and a sampler (5) are provided above the front of the coal conveyor belt (2); the sampler (5) is connected to a fine grinder (6) via a secondary crushing and shrinking unit; and the outlet of the fine grinder (6) is connected to a coal analyzer (8) via a tablet press (7); The secondary crushing and shrinking unit comprises a primary crushing and shrinking section and a secondary crushing and shrinking section, and a sampling conveyor belt (11) between the sampling machine (5) and the primary crushing and shrinking section is provided with a plurality of flow parts for preventing coal from sticking.

2. The device for automatic sampling of high-moisture coal according to claim 1, characterized in that: The end of the primary crushing and shrinking section is respectively connected to the head end of the secondary crushing and shrinking section and the coal elevator (1), and the end of the secondary crushing and shrinking section is respectively connected to the fine grinder (6) and the coal elevator (1).

3. The device for automatic sampling of high-moisture coal according to claim 2, characterized in that: The primary crushing and reducing section comprises a primary crusher (9) and a primary reducing machine (10); the inlet of the primary crusher (9) is connected to a sampling conveyor belt (11); and the outlet of the primary reducing machine (10) is connected to the head end of the secondary crushing and reducing section and the coal hoist (1) through corresponding pairs of conveyor belts.

4. The device for automatic sampling of high-moisture coal according to claim 3, characterized in that: The secondary crushing and reducing section comprises a secondary crusher (12) and a secondary reducing machine (13). The inlet of the secondary crusher (12) is connected to the outlet of the primary reducing machine (10), and the outlet of the secondary reducing machine (13) is connected to the fine grinding machine (6) and the coal hoist (1) through corresponding pairs of conveyor belts.

5. The device for automatic sampling of high-moisture coal according to claim 1, characterized in that: A tee is provided between the tablet press (7) and the coal analyzer (8), and the third end of the tee is connected to the coal hoist (1).

6. The device for automatic sampling of high-moisture coal according to claim 1, characterized in that: The circulation member includes a motor (14) and a linkage shaft, the linkage shaft includes a middle recessed section (15) and raised sections (16) on both sides, the raised section on one side is connected to the motor (14), and the raised section on the other side is connected to the bearing seat (17); the middle recessed section (15) and the raised sections (16) on both sides are an integrated structure; Anti-blocking sheets (19) are respectively provided on the recessed section (15) and the raised section (16).

7. The device for automatic sampling of high-moisture coal according to claim 1, characterized in that: A coal flow detector (18) is provided above the coal conveying belt (2) in front of the online moisture detector (4).

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