A device for automatic sampling in the middle of a coal belt

Abstract

The utility model discloses a device for automatic sampling in the middle of a coal belt, comprising a bracket; the bracket is placed above the belt conveyor, and the two ends of the arch frame are fixed to one side of the bracket; the rotating shaft is rotatably connected to the bearing seat through a bearing, the output shaft of the driving structure is connected to one end of the rotating shaft through a gear transmission, the rotating shaft is fixed to a connecting plate, the connecting plate is fixed to a first shaft rod, the first shaft rod is rotatably connected to the lower half of the sampling rod, the upper half of the sampling rod is slidably connected to the second shaft rod, and the second shaft rod is fixed to the top of the arch frame; a sampling box is provided at the bottom end of the sampling rod, the top end of the sampling rod is fixed to one end of a steel wire rope, and the other end of the steel wire rope passes around a guide wheel rotatably connected to the bracket and is fixed to a counterweight. Advantages: the sampling box is driven by the sampling rod to rotate along the cross-sectional direction of the belt travel direction to take away the coal sample, and the moment of sudden drop due to gravity is used to make the suspended coal sample fall into the sampling bucket, which is labor-saving and safe.

Description

Technical field:

[0001] The utility model relates to the field of sampling, in particular to a device used for automatic sampling in the middle of a coal belt. Background technology:

[0002] With the development of industrial automation technology, major coal mines, coal preparation plants and coke plants across the country are also working hard to improve the efficiency of all employees and improve the quality of operations by improving the level of automation. As an important part of the daily work of coal production and demand enterprises, metering work also needs to improve accuracy and reduce the labor intensity of employees. At present, the metering accuracy of metering equipment has reached 0.2% to 0.5%, which meets the requirements of commercial measurement standards, but the accuracy of sampling and analysis systems is far behind. Most units of coal production and demand enterprises across the country still use traditional manual sampling methods, which naturally have many problems in terms of scientificity and accuracy.

[0003] At present, various index coal raw materials in coking plants are still sampled manually on belt conveyors during the process of batching by belt conveyors. However, the amount of each sample may be more or less, resulting in poor randomness of sampling. The representativeness of coal samples is greatly affected by human factors. In addition, manual sampling is labor-intensive and dangerous during the operation of belt conveyors. Utility model content:

[0004] The utility model aims to provide a device for automatically sampling the middle part of a coal belt.

[0005] The utility model is implemented by the following technical solutions:

[0006] A device for automatic sampling in the middle of a coal belt, comprising a bracket, an arch frame, a driving structure, a bearing seat, a rotating shaft, a connecting plate, a first shaft rod, a sampling rod, a second shaft rod, a proximity switch, a steel wire rope, a counterweight, and a sampling bucket;

[0007] The bracket is placed above the belt conveyor, and both ends of the bracket are fixed to the frame of the belt conveyor, both ends of the arch frame are fixed to one side of the bracket, and the driving structure and the bearing seat are fixed to the bracket;

[0008] The rotating shaft is rotatably connected to the bearing seat through a bearing, the output shaft of the driving structure is connected to one end of the rotating shaft through a gear transmission, the other end of the rotating shaft is vertically fixed to one end of the connecting plate, the other end of the connecting plate is vertically fixed to one end of the first shaft rod, the other end of the first shaft rod is rotatably connected to the lower half of the sampling rod, the upper half of the sampling rod is slidably connected to one end of the second shaft rod along the length direction of the sampling rod, and the other end of the second shaft rod is fixed to the top of the arch frame;

[0009] The proximity switch is provided on the bearing seat, the signal output end of the proximity switch is connected to the signal receiving end of the controller, and the controller is electrically connected to the motor of the driving structure;

[0010] A sampling box is fixed at the bottom end of the sampling rod, the opening of the sampling box is oriented horizontally and perpendicularly to the traveling direction of the belt conveyor, the top end of the sampling rod is fixed to one end of the steel wire rope, the other end of the steel wire rope passes around the guide wheel rotatably connected to the bracket, and is fixed to the counterweight block;

[0011] The sampling bucket is placed on one side of the belt conveyor.

[0012] Preferably, the driving structure comprises a motor and a reducer, the output shaft of the motor is connected and fixed to the input shaft of the reducer, and the output shaft of the reducer is the output shaft of the driving structure.

[0013] Preferably, the lower half of the sampling rod is provided with a plurality of through holes, and the end of the first shaft rod is rotatably connected to the lower half of the sampling rod by passing through any of the through holes; the upper half of the sampling rod is provided with a through groove along the length direction, and the end of the second shaft rod is slidably connected to the sampling rod by passing through the through groove.

[0014] Preferably, it further comprises a sample receiving bucket, wherein the sample receiving bucket is connected with the bottom of the sampling hopper through a connecting pipe.

[0015] The advantages of the utility model are as follows: the sampling rod drives the sampling box to rotate along the cross-sectional direction of the belt's traveling direction to take out the coal sample, and utilizes the moment of sudden drop due to gravity to make the suspended coal sample fall into the sampling bucket to complete the sampling, replacing manual labor, saving effort and being safe, while stabilizing the sampling and reducing randomness; the sampling box moves in a circular trajectory and can approach the concave surface of the belt, adapt to the shape and structure of the belt, and effectively sample; the sampling rod can adjust the distance from the concave surface of the belt up and down to adjust the sampling amount. Description of the drawings:

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 yes Figure 1 Left view of .

[0019] Figure 3 yes Figure 1 Schematic diagram of the usage status.

[0020] In the figure: bracket 1, arch frame 2, drive structure 3, bearing seat 4, rotating shaft 5, connecting plate 6, first shaft 7, sampling rod 8, second shaft 9, proximity switch 10, wire rope 11, counterweight 12, sampling bucket 13, sampling box 14, guide wheel 15, motor 16, reducer 17, through hole 18, through slot 19, sample receiving barrel 20, controller 21. Specific implementation method:

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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.

[0022] like Figure 1 , Figure 2 , Figure 3 As shown, a device for automatic sampling in the middle of a coal belt comprises a bracket 1, an arch frame 2, a driving structure 3, a bearing seat 4, a rotating shaft 5, a connecting plate 6, a first shaft 7, a sampling rod 8, a second shaft 9, a proximity switch 10, a wire rope 11, a counterweight 12, and a sampling bucket 13;

[0023] The bracket 1 is placed above the belt conveyor, and both ends of the bracket 1 are fixed to the frame of the belt conveyor. The bracket 1 spans the belt conveyor and is horizontally and vertically to the traveling direction of the belt conveyor. Both ends of the arch frame 2 are fixed to one side of the bracket 1. The driving structure 3 and the bearing seat 4 are fixed on the bracket 1, and the bearing seat 4 is placed in the center of the arch frame 2.

[0024] The rotating shaft 5 is rotatably connected to the bearing seat 4 through a bearing, and the output shaft of the driving structure 3 is connected to one end of the rotating shaft 5 through a gear transmission. The driving structure 3 includes a motor 16 and a reducer 17. The output shaft of the motor 16 is connected and fixed to the input shaft of the reducer 17. The output shaft of the reducer 17 is the output shaft of the driving structure 3. The other end of the rotating shaft 5 is vertically fixed to one end of the connecting plate 6. The rotating shaft 5 is horizontal, and the connecting plate 6 is arranged longitudinally. The other end of the connecting plate 6 is vertically fixed to one end of the first shaft rod 7. The first shaft rod 7 is horizontal, and the other end of the first shaft rod 7 is rotatably connected to the lower half of the sampling rod 8. The sampling rod 8 is arranged longitudinally. The lower half of the sampling rod 8 is provided with a plurality of through holes 18. The end of the first shaft rod 7 is connected to the sampling rod by penetrating any through hole 18. The lower half of the sampling rod 8 is rotatably connected, and a nut can be screwed on the end of the first shaft rod 7 to prevent the end of the first shaft rod 7 from being separated from the sampling rod 8. The arrangement of multiple through holes 18 can utilize the ends of the first shaft rod 7 to be connected in different through holes 18 to achieve the adjustment of the upper and lower heights of the sampling rod 8, so that the bottom end of the sampling rod 8 is close to or away from the top surface of the belt of the belt conveyor; the upper half of the sampling rod 8 is slidably connected with one end of the second shaft rod 9 along the length direction of the sampling rod 8, and the upper half of the sampling rod 8 is provided with a through groove 19 along the length direction. The end of the second shaft rod 9 is slidably connected with the sampling rod 8 by penetrating the through groove 19, and the other end of the second shaft rod 9 is fixed to the top of the arch frame 2, and a nut can be screwed on the end of the second shaft rod 9 to prevent the end of the second shaft rod 9 from being separated from the sampling rod 8;

[0025] The motor 16 drives the rotating shaft 5 to rotate through the reducer 17 through the gear transmission mode, and the rotating shaft 5 drives the connecting plate 6 to rotate in a circular trajectory. The connecting plate 6 drives the lower half of the sampling rod 8 to rotate in a circular trajectory through the first shaft rod 7. At the same time, the upper half of the sampling rod 8 is driven up and down. At this time, the through groove 19 is used to slide on the second shaft rod 9 to effectively adapt to the up and down movement of the sampling rod 8. The through groove 19 has a limiting and guiding effect on the sampling rod 8.

[0026] The bearing seat 4 is provided with a proximity switch 10, the signal output end of the proximity switch 10 is connected to the signal receiving end of the controller 21, the controller 21 is electrically connected to the motor 16 of the driving structure 3, the connecting plate 6 is close to the proximity switch 10, and sends a signal to the controller 21, the controller 21 is a PLC controller, and the controller 21 controls the motor 16 to stop;

[0027] The bottom end of the sampling rod 8 is fixed with a sampling box 14, the opening of the sampling box 14 is oriented horizontally and perpendicularly to the direction of travel of the belt conveyor, the sampling rod 8 drives the sampling box 14 to rotate in a circular trajectory, and can adapt to the concave surface of the belt conveyor. When the sampling box 14 is at the lowest position, the coal is dug out for sampling, the top end of the sampling rod 8 is fixed to one end of the wire rope 11, and the other end of the wire rope 11 passes around the guide wheel 15 that is rotatably connected to the bracket 1, and is fixed to the counterweight 12. After the sampling box 14 is sampled, it is sensed, and the motor 16 stops. At this time, the gravity of the counterweight 12 falls down, and suddenly pulls the top end of the sampling rod 8, and the sampling rod 8 suddenly rotates downward back to its original position, and the sample in the sampling box 14 is scattered;

[0028] The sampling hopper 13 is placed on one side of the belt conveyor, and the scattered samples enter the sampling hopper 13 .

[0029] It also includes a sample receiving barrel 20, which is connected to the bottom of the sampling bucket 13 through a connecting pipe. The connecting pipe is connected to the bottom of the sampling bucket 13, and the sample can enter the sample receiving barrel 20 through the sampling bucket 13, and the sample can be taken away through the sample receiving barrel 20.

[0030] Working principle:

[0031] When no sampling is done, the counterweight 12 falls, and the top of the sampling rod 8 is pulled by the wire rope 11 to tilt toward the guide wheel 15. At this time, the bottom end of the sampling rod 8 drives the sampling box 14 to tilt upward and away from the belt of the belt conveyor, and the belt conveyor transports coal normally.

[0032] When sampling, Figure 1 As shown, the motor 16 drives the rotating shaft 5 to rotate through the reducer 17 through the gear transmission mode. The dotted arrow in the figure is the rotation direction. The rotating shaft 5 drives the connecting plate 6 to rotate in a circular trajectory. The dotted circle in the figure is the circular trajectory. The connecting plate 6 drives the lower half of the sampling rod 8 to rotate in a circular trajectory through the first shaft rod 7. At this time, taking the figure as an example, the upper half of the sampling rod 8 pulls the counterweight block 12 to rise, and the lower half of the sampling rod 8 moves toward the sampling bucket 13. The sampling box 14 is driven to the concave surface of the top belt of the belt conveyor to shovel the coal sample from the coal being transported;

[0033] Afterwards, if Figure 3 As shown, when the sampling rod 8 is lifted, the sampling box 14 is placed above the sampling bucket 13, the connecting plate 6 is sensed, the motor 16 is powered off and stopped, and there is a lack of driving force. At this time, the counterweight 12 falls down due to gravity, suddenly pulling the top of the sampling rod 8 downward, and the sampling rod 8 suddenly rotates downward back to its original position. The sample in the sampling box 14 is suspended in the air and is no longer supported by the force of the sampling box 14, so it is scattered and falls into the sampling bucket 13 to complete the sampling.

[0034] The sampling rod 8 drives the sampling box 14 to rotate along the cross-sectional direction of the belt's travel direction to take out the coal sample, and uses the moment of sudden drop due to gravity to make the suspended coal sample fall into the sampling bucket 13 to complete the sampling, replacing manual labor, saving effort and being safe, while also stabilizing the sampling and reducing randomness; the sampling box 14 moves in a circular trajectory, can approach the concave surface of the belt, adapt to the shape and structure of the belt, and effectively sample; the sampling rod 8 can adjust the distance from the concave surface of the belt up and down to adjust the sampling amount.

[0035] 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 device for automatic sampling in the middle of a coal belt, characterized in that: It includes a bracket, an arch frame, a driving structure, a bearing seat, a rotating shaft, a connecting plate, a first shaft rod, a sampling rod, a second shaft rod, a proximity switch, a wire rope, a counterweight, a sampling bucket, and a controller; The bracket is placed above the belt conveyor, and both ends of the bracket are fixed to the frame of the belt conveyor, both ends of the arch frame are fixed to one side of the bracket, and the driving structure and the bearing seat are fixed to the bracket; The rotating shaft is rotatably connected to the bearing seat through a bearing, the output shaft of the driving structure is connected to one end of the rotating shaft through a gear transmission, the other end of the rotating shaft is vertically fixed to one end of the connecting plate, the other end of the connecting plate is vertically fixed to one end of the first shaft rod, the other end of the first shaft rod is rotatably connected to the lower half of the sampling rod, the upper half of the sampling rod is slidably connected to one end of the second shaft rod along the length direction of the sampling rod, and the other end of the second shaft rod is fixed to the top of the arch frame; The proximity switch is provided on the bearing seat, the signal output end of the proximity switch is connected to the signal receiving end of the controller, and the controller is electrically connected to the motor of the driving structure; A sampling box is fixed at the bottom end of the sampling rod, the opening of the sampling box is oriented horizontally and perpendicularly to the traveling direction of the belt conveyor, the top end of the sampling rod is fixed to one end of the steel wire rope, the other end of the steel wire rope passes around the guide wheel rotatably connected to the bracket, and is fixed to the counterweight block; The sampling bucket is placed on one side of the belt conveyor.

2. The device for automatic sampling in the middle of a coal belt according to claim 1, characterized in that: The driving structure comprises a motor and a reducer. The output shaft of the motor is connected and fixed to the input shaft of the reducer. The output shaft of the reducer is the output shaft of the driving structure.

3. The device for automatic sampling in the middle of a coal belt according to claim 2 is characterized in that: The lower half of the sampling rod is provided with a plurality of through holes, and the end of the first shaft rod is rotatably connected to the lower half of the sampling rod by passing through any of the through holes; the upper half of the sampling rod is provided with a through groove along the length direction, and the end of the second shaft rod is slidably connected to the sampling rod by passing through the through groove.

4. The device for automatic sampling in the middle of a coal belt according to claim 3 is characterized in that: It also includes a sample receiving bucket, which is connected with the bottom of the sampling hopper through a connecting pipe.

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