Automatic coal sample moisture testing equipment

Abstract

Automatic coal sample moisture testing equipment is characterized in that a parallel sample uniform division mechanism is fixedly mounted on a rack, the parallel sample uniform division mechanism comprises a hopper fixedly arranged on the upper portion, a rotary driving mechanism is mounted on the side wall of the hopper, an output shaft of the rotary driving mechanism extends into the hopper, and a vacuum chuck is fixedly connected to the output shaft of the rotary driving mechanism; the vacuum suction cups are connected with air pumps, vibration conveying grooves are correspondingly formed in discharging ports in the lower ends of the face plates, discharging pipes are fixedly connected to the discharging ends of the vibration conveying grooves, a material collecting bin is fixedly arranged on the inner wall of the circular part, and a hinged plate valve is arranged at the bottom of the material collecting bin and hinged to the lower end of the circular part. A conical discharging part is fixedly arranged below the circular part, the lower end of the conical discharging part is connected to a riffle with a change-over valve, one outlet of the riffle is connected to a second inlet of the three-way discharging device, and the other outlet of the riffle is connected to a belt division machine. The test equipment is good in parallelism.

Description

Technical Field

[0001] The utility model relates to coal sample detection, in particular to an automatic moisture testing device, belonging to the technical field of coal sample analysis and testing equipment. Background Art

[0002] In the incoming coal sample detection of steel mills, there is a detection item of crushing the coal sample to a certain particle size, and then randomly taking several parallel samples with a weight of about 100 g / sample to detect the moisture. After the moisture detection is completed, other analyses (such as chemical items) are carried out. According to the requirements of sampling and sample preparation, in order to achieve representativeness, the crushed material cannot be less than a certain weight, and the weight of the finally required parallel samples is very small. This requires randomly reducing parallel samples from a relatively large amount of samples, and the analysis results of the parallel samples after detection must also be within the allowable error range. At present, coal sampling and sample preparation are all fully automatic. After random sampling, the sample is crushed to the required particle size by a crusher, and a manipulator is used to weigh the coal sample and then put it into an oven for drying and then taken out for weighing to obtain the moisture content, which is also the existing technology of coal sample moisture testing equipment. However, in the link of preparing about 100 g of parallel samples, it still basically relies on manual operation. Because the amount of parallel samples is very small and the amount of incoming samples is large, the main manual link is to weigh the samples. There are inevitable problems in manual weighing of samples, such as human interference and cheating, poor representativeness of manual sampling, and inability to know and overcome when the samples are uneven. These cannot objectively reflect the true situation of the samples. In many cases, the results do not conform to the objective situation in use, and there are also cases where the detection results of non-conforming parallel samples do not meet the requirements. When there is a large difference from the supplier's factory results, it is necessary to repeatedly sample and then conduct a test review of the parallel samples. In addition, currently, the automatic moisture testing equipment generally uses an oven to dry the samples. Dozens of samples can be placed in the oven at one time. This kind of oven still needs to reach the designed drying temperature even when the number of samples is small, resulting in high energy consumption. Also, currently, the drying temperature generally exceeds 100 degrees. In this case, there will be sample oxidation, and sample oxidation will affect the test results, bringing errors to the final results. Summary of the Invention

[0003] The purpose of the utility model is to overcome the above problems existing in the current coal sample moisture testing, and provide an automatic coal sample moisture testing device.

[0004] To achieve the object of the present utility model, the following technical solutions are adopted: A coal sample moisture automatic testing device, including a frame and a belt splitter, an oven, a robotic arm, and an electronic scale installed on the frame. The robotic arm is a three-axis robotic arm. One end of the belt splitter has a feed inlet and the other end has a waste outlet. A splitter shovel mechanism is configured on the belt splitter. One side of the splitter shovel mechanism has a belt splitter discharge outlet. A tray collection rack is fixedly installed on the frame. A three-way discharge device is installed at the belt splitter discharge outlet. The three-way discharge device has two inlets and one outlet. The discharge outlet of the belt splitter is connected to the first inlet of the three-way discharge device. A tray rack is arranged below the outlet of the three-way discharge device. The tray rack is fixedly connected to the moving end of a lifting mechanism. The lifting mechanism is fixedly connected to the frame;

[0005] A parallel sample uniform splitting mechanism is also fixedly installed on the frame. The parallel sample uniform splitting mechanism includes a hopper fixedly arranged above. A rotary drive mechanism is installed on the side wall of the hopper. The output shaft of the rotary drive mechanism extends into the hopper. A vacuum suction cup is fixedly connected to the output shaft of the rotary drive mechanism. The vacuum suction cup is connected to an air extraction pump. A vibrating feeding trough is correspondingly installed at the discharge outlet at the lower end of the hopper. The discharge end of the vibrating feeding trough is fixedly connected to a feeding pipe. The feeding pipe is inserted into a distributing pipe. The upper part of the distributing pipe has a vertical part. A bent part is integrally arranged below the vertical part. The vertical part is rotatably installed at the upper end of a distributing bin. A rotation drive mechanism is connected to the vertical part of the distributing pipe. The distributing bin below the bent part is a circular part. An aggregate bin is fixedly arranged on the inner wall of the circular part. When the distributing pipe rotates, it passes above the aggregate bin. A hinged plate valve is arranged at the bottom of the aggregate bin. The hinged plate valve is hinged at the lower end of the circular part. The outer end of the hinged plate valve is hinged to the moving end of an electric push rod. The electric push rod is hinged to the distributing bin. A conical discharge part is fixedly arranged below the circular part. The lower end of the conical discharge part is connected to a two-way splitter with a conversion valve. One outlet of the two-way splitter is connected to the second inlet of the three-way discharge device and the other outlet is connected to the belt splitter;

[0006] The oven uses multiple small ovens. Each small oven is connected with a nitrogen gas pipeline. A valve is installed on the nitrogen gas pipeline. Each small oven is equipped with an independent heating and temperature control device; An opening and closing door is installed on each small oven.

[0007] Furthermore; A flattening plate is fixedly installed above the tray collection rack.

[0008] Furthermore; An adjustable-height adjusting plate is installed on the vibrating trough.

[0009] The positive and beneficial technical effects of the present utility model are as follows: This testing device adopts two-stage splitting. The weight of the split sample is appropriate, the representativeness is good, and the parallelism is good, avoiding the related problems caused by manually weighing samples. It will be specifically elaborated in combination with the specific embodiments. Brief Description of the Drawings

[0010] Figure 1 is one of the overall schematic diagrams of the present utility model.

[0011] Figure 2 is the second of the overall schematic diagrams of the present utility model.

[0012] Figure 3 is a schematic diagram of the upper part of the parallel sample uniform reduction mechanism.

[0013] Figure 4 is a partial cross-sectional view of the parallel sample uniform reduction mechanism in one direction.

[0014] Figure 5 is a partial cross-sectional view of the parallel sample uniform reduction mechanism in another direction. Detailed Description of the Preferred Embodiments

[0015] To more fully explain the implementation of the present utility model, implementation examples of the present utility model are provided. These implementation examples are only elaborations of the present utility model and do not limit the scope of the present utility model.

[0016] With reference to the accompanying drawings, the present utility model is further explained in detail. The reference numerals in the drawings are: 1: frame; 2: robotic arm; 3: belt splitter; 4: feed inlet; 5: waste outlet; 6: three-way discharger; 7: hopper; 8: rotating motor; 9: vibrating trough; 10: belt pulley; 11: drive motor; 12: conical discharge part; 13: riffle; 14: small oven; 15: tray rack; 16: spreading plate; 17: electronic scale; 18: tray support; 19: lifting cylinder; 20: tray; 21: vacuum suction cup; 22: feeding pipe; 23: distributing pipe; 24: distributing bin; 25: circular part; 26: collecting bin; 27: hinged plate valve; 28: electric push rod; 29: bending part; 30: distributing pipe drive motor; 31: switching valve; 32: first outlet; 33: second outlet.

[0017] As shown in the attached drawings, a coal sample moisture automatic testing device includes a frame 1, a belt splitter 3, an oven, a robotic arm 2, and an electronic scale 13 installed on the frame. The robotic arm is a three-axis robotic arm, namely a three-axis robotic arm in the X, Y, and Z directions. In the present utility model, two robotic arms are adopted, and each of the two robotic arms is responsible for a part of the operation. One end of the belt splitter has a feed inlet 4, and the other end has a reject outlet 5. A splitting shovel mechanism is configured on the belt splitter. One side of the splitting shovel mechanism has a belt splitter discharge outlet. The belt splitter and the splitting shovel mechanism thereon are all existing technologies and will not be elaborated here. A tray collection rack 15 is fixedly installed on the frame, and a spreading plate 16 is fixedly installed above the tray collection rack; a three-way discharge device 6 is installed at the belt splitter discharge outlet. The three-way discharge device has two inlets and one outlet. The discharge outlet of the belt splitter is connected to the first inlet of the three-way discharge device. A tray rack 18 is arranged below the outlet of the three-way discharge device. The tray rack 18 is fixedly connected to the moving end of a lifting cylinder 19, and the lifting cylinder is fixedly connected to the frame 1. After the incoming material enters from the feed inlet of the splitter, the belt splitter operates, and the material is shoveled to the discharge outlet by the splitting shovel, enters through the first inlet of the three-way distributor, and falls into the tray on the tray rack to obtain a primary split sample. The tray has a structure with an edge at the upper end. A plurality of support columns are fixedly installed on the tray rack, and the edge is supported on the support columns. After the lifting cylinder descends, the robotic arm moves the tray to the tray collection rack or directly to the hopper for parallel sample splitting. The front end of the robotic arm is a U-shaped structure, and the two U-shaped edges just hold up the edge.

[0018] A parallel sample uniform splitting mechanism is also fixedly installed on the frame. The parallel sample uniform splitting mechanism includes a hopper 7 fixedly arranged above. A rotary motor 8 is installed on the side wall of the hopper. The output shaft of the rotary motor extends into the hopper 7, and a vacuum suction cup 21 is fixedly connected to the output shaft of the rotary motor. The vacuum suction cup is connected to an air extraction pump. A vibrating feed trough 9 is correspondingly installed at the discharge outlet at the lower end of the hopper 7. An adjustable-height adjusting plate is installed on the vibrating trough. The adjusting plate is not shown in the figure. The discharge speed is adjusted by adjusting the height between the adjusting plate and the trough bottom, which is similar to the principle of a gate and has many implementation methods. For example, a plate with a connection hole can be fixedly installed on the vibrating feed trough, and the adjusting plate has a long hole in the up-down direction, and a bolt can be passed through the long hole and the installation hole for fixed connection.

[0019] The discharge end of the vibrating feeding trough is fixedly connected with a blanking pipe 22, and the blanking pipe 22 is inserted into the material distributing pipe 23. The upper part of the material distributing pipe has a vertical part at one end, and a bending part 29 is integrally arranged below the vertical part. The vertical part is rotatably installed at the upper end of the material distributing bin. A rotation driving mechanism is connected to the vertical part of the material distributing pipe. In this embodiment, a belt pulley 10 is fixedly connected to the vertical part of the material distributing pipe, and a driving pulley is also connected to the output shaft of the driving motor of the material distributing pipe. The driving pulley and the belt pulley are driven by a synchronous belt. The material distributing bin below the bending part is a circular part 25, and an aggregate bin 26 is fixedly arranged on the inner wall of the circular part. When the material distributing pipe rotates, it passes above the aggregate bin 26. A hinged plate valve 27 is arranged at the bottom of the aggregate bin. The hinged plate valve 27 is hinged at the lower end of the circular part, and the outer end of the hinged plate valve is hinged at the action end of the electric push rod 28. The electric push rod 28 is hinged on the material distributing bin. A conical discharging part 12 is fixedly arranged below the circular part, and the lower end of the conical discharging part is connected to a two-way divider 13 with a switching valve. As shown in 31, the switching valve is a rotatable valve plate, which is driven by a switching valve motor and rotates to different positions corresponding to different outlets. The second outlet 33 of the two-way divider 13 is connected to the second inlet of the three-way discharger, and the first outlet 32 is connected to the belt splitter. When parallel samples are locked and divided, the robotic arm shovels up a primary divided sample and places it on the vacuum suction cup. The vacuum suction cup evacuates air to adsorb the tray, and then the rotating motor rotates 180 degrees. The tray opening faces downward, and the material falls into the hopper. The rotating motor resets, the vacuum is released, the robotic arm takes away the tray, and the material falls from the hopper into the vibrating feeding trough. The vibrating feeding trough conveys the material to the blanking pipe through vibration and falls into the material distributing pipe. The driving motor of the material distributing pipe drives the material distributing pipe to rotate, so that a part of the material falls into the aggregate bin (the hinged plate valve is closed), and the other part of the material directly passes through the conical discharging part and then enters the first outlet of the two-way divider and falls into the belt splitter. When the set time is reached, the vibrating feeding trough stops, the switching valve changes direction, the hinged plate valve 27 opens, and the material in the aggregate bin enters the three-way discharger through the second outlet and then falls into the tray to obtain a parallel sample. According to the above process, the required number of parallel samples can be obtained.

[0020] The oven mentioned above adopts multiple small ovens. Each small oven is connected with a nitrogen gas pipeline, and a valve is installed on the nitrogen gas pipeline. Each small oven is equipped with an independent heating and temperature control device; an opening and closing door is installed on each small oven. The opening and closing can be realized by hinging the door above on the door frame of the oven, and an electromagnet is installed on the door frame. When the electromagnet is energized, it attracts and closes the door and the door cannot be opened. When the electromagnet is energized, the door is in a free state, and the robotic arm can freely enter and exit with the tray (the upper end surfaces of the robotic arm and the tray are flush). The robotic arm first weighs (flattens) the parallel sample and then puts it into the small oven, turns on the heating and nitrogen gas, and takes it out and weighs it after drying to the set time, and then the moisture content can be obtained.

[0021] After describing the embodiments of the present utility model in detail, those skilled in the art can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent application. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model all belong to the scope of the technical solution of the present utility model, and the present utility model is also not limited to the embodiments described in the specification.

Claims

1. An automatic coal sample moisture testing device, comprising a frame and a belt splitter, an oven, a robotic arm, and an electronic scale installed on the frame. The robotic arm is a three-axis robotic arm. One end of the belt splitter has a feed inlet, and the other end has a waste outlet. A splitter shovel mechanism is arranged on the belt splitter, and there is a belt splitter discharge outlet on one side of the splitter shovel mechanism. A tray collection rack is also fixedly installed on the frame, and it is characterized in that: A three-way discharge device is installed at the discharge port of the belt splitter. The three-way discharge device has two inlets and one outlet. The discharge port of the belt splitter is connected to the first inlet of the three-way discharge device. A tray rack is arranged below the outlet of the three-way discharge device. The tray rack is fixedly connected to the moving end of the lifting mechanism, and the lifting mechanism is fixedly connected to the frame. A parallel sample uniform splitting mechanism is also fixedly installed on the frame. The parallel sample uniform splitting mechanism includes a hopper fixedly arranged above. A rotary drive mechanism is installed on the side wall of the hopper. The output shaft of the rotary drive mechanism extends into the hopper. A vacuum suction cup is fixedly connected to the output shaft of the rotary drive mechanism. The vacuum suction cup is connected to an air extraction pump. A vibrating feeding trough is correspondingly installed at the discharge port at the lower end of the hopper. The discharge end of the vibrating feeding trough is fixedly connected to a feeding pipe. The feeding pipe is inserted into the distribution pipe. The upper part of the distribution pipe has a vertical part, and a bending part is integrally arranged below the vertical part. The vertical part is rotatably installed at the upper end of the distribution bin. A rotation drive mechanism is connected to the vertical part of the distribution pipe. The distribution bin below the bending part is a circular part. An aggregate bin is fixedly arranged on the inner wall of the circular part. When the distribution pipe rotates, it passes above the aggregate bin. A hinged plate valve is arranged at the bottom of the aggregate bin. The hinged plate valve is hinged at the lower end of the circular part. The outer end of the hinged plate valve is hinged to the moving end of the electric push rod. The electric push rod is hinged to the distribution bin. A conical discharge part is fixedly arranged below the circular part. The lower end of the conical discharge part is connected to a two-way splitter with a conversion valve. One outlet of the two-way splitter is connected to the second inlet of the three-way discharge device, and the other outlet is connected to the belt splitter. The oven adopts a plurality of small ovens. Each small oven is connected with a nitrogen gas pipeline. A valve is installed on the nitrogen gas pipeline. Each small oven is equipped with an independent heating and temperature control device; An opening and closing door is installed on each small oven.

2. The automatic coal sample moisture testing device according to claim 1, characterized in that: An adjustable-height adjusting plate is installed on the vibrating feeding trough.

3. An automatic coal sample moisture testing device according to claim 1, characterized in that: A spreading plate is fixedly installed above the tray rack.

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