Automatic sampling equipment for coal quality testing

Abstract

The present application relates to an automatic sampling device for coal quality detection, which includes a sampling tube for connecting with the lower end of a conveyor, and a material holding part located below the sampling tube, the sampling tube includes at least two sections of pipes, adjacent pipes are mutually sleeved and fixed by limiters; each section of the pipe is provided with a valve; the material holding part includes a conveyor belt and a number of material holding barrels located on the conveyor belt, and the material holding barrels are located directly below the sampling tube one by one during the conveying process. The present application utilizes the switching opening and closing of the upper and lower valves to automatically store a certain amount of coal in the sampling tube, and then the coal in the sampling tube is dropped into the material holding barrel, which has the effects of automatic sampling, convenient operation, and guaranteed detection accuracy.

Description

Technical Field

[0001] The present application relates to the field of coal quality detection technology, and in particular to an automatic sampling device for coal quality detection. Background Art

[0002] Coal sampling is the process of taking a representative portion of coal from the entire batch in accordance with regulations in order to test or detect the quality of coal.

[0003] In the related art, screw conveyors are often used to transport coal. When sampling of the coal transported by the screw conveyor is required, a sampling spoon is usually inserted into the discharge end of the screw conveyor to take samples manually, and then the coal samples are tested.

[0004] Regarding the above-mentioned related technologies, the inventors believe that manual sampling requires workers to hold a sampling spoon to take samples, which is troublesome to operate. On the other hand, manual sampling cannot guarantee the sampling volume, which affects the test results. Summary of the invention

[0005] In order to quantitatively sample and ensure detection accuracy while facilitating sampling work, the present application provides an automatic sampling device for coal quality detection.

[0006] The present application provides an automatic sampling device for coal quality detection using the following technical solution:

[0007] An automatic sampling device for coal quality detection comprises a sampling tube for communicating with the lower end of a conveyor, and a material holding member located below the sampling tube, wherein the sampling tube comprises at least two sections of pipelines, adjacent pipelines are mutually sleeved and fixed by limit members; each section of the pipeline is correspondingly provided with a valve; the material holding member comprises a conveyor belt and a plurality of material holding barrels located on the conveyor belt, wherein the material holding barrels are located directly below the sampling tube one by one during the conveying process.

[0008] By adopting the above technical solution, the sampling tube is fixed at the lower end of the conveyor, the upper valve is opened, and the lowermost valve is closed. Then, during the transportation of coal, the coal will fall into the sampling tube under the action of its own weight and fill the sampling tube. Then, according to demand, the upper valve can be closed and the lowermost valve can be opened. The coal in the sampling tube will directly fall into the material bucket on the conveyor belt, thereby realizing the sampling of coal.

[0009] In this process, since the sampling space in the sampling tube is a section between adjacent valves, it can be ensured that the sampling volume each time is almost consistent, and the adjacent pipes are connected to each other, so the distance between adjacent pipes can be adjusted and fixed by the limiter. The size of the sampling space can be changed according to the sampling volume requirements, which is convenient for sampling work of different coal quantities;

[0010] At the same time, since the opening and closing of the sampling tube is controlled by the valve, and the space between the valves is constant, the space in the sampling tube will be automatically filled during the coal transportation process, which can ensure that the sampling volume is almost the same each time, thereby ensuring the detection accuracy; at the same time, the interval time of the valve opening and closing, as well as the corresponding conveyor belt start time, can be set, so automatic coal sampling can be realized.

[0011] Optionally, the limiting member includes limiting blocks arranged on adjacent pipes, and adjacent surfaces of the two limiting blocks are respectively rotatably connected to rotating rods, and the other ends of the two rotating rods are rotatably connected to two ends of the same driving block; a screw rod is passed through and threadedly connected to the driving block, and the screw rod is arranged parallel to the radial direction of the pipe, and one end is rotatably connected to the pipe and vertically displaced along the pipe.

[0012] By adopting the above technical solution, one end of the screw rod is rotatably connected to the pipeline. When the screw rod is rotated, since the rotating rod is connected to the limit block and the driving block, the circumferential rotation of the driving block is limited. Therefore, under the action of the threaded cooperation between the screw rod and the driving block, the driving block can be driven to move linearly along the screw rod, and the two ends of the rotating rod are respectively rotated with the driving block and the limit block, so the inclination angle of the rotating rod can be changed, thereby promoting the displacement of adjacent pipelines. When the screw rod is rotated without external force, it plays a limiting role on the adjacent pipelines, thereby changing the distance between adjacent pipelines to meet the needs of different sampling volumes.

[0013] Optionally, the limiting member further comprises a telescopic rod located between adjacent limiting blocks, the telescopic rod comprising a rod 1 and a rod 2 coaxially sleeved outside the rod 1, and ends of the rod 1 and the rod 2 that are away from each other are respectively connected to the limiting blocks.

[0014] By adopting the above technical solution, the sleeve connection between the second rod and the first rod guides the displacement of the adjacent pipelines, thus facilitating the displacement of the adjacent pipelines.

[0015] Optionally, one end of the rotating rod that is away from each other is rotatably connected with a positioning block 1, the longitudinal section of the positioning block 1 is T-shaped, and the limit block is provided with a positioning groove 1 for horizontal insertion of the positioning block 1 along the radial direction of the pipeline, and a support rod is fixed on the limit block, and the support rod is provided with a slot with a T-shaped cross-section along its own height direction, and a limiting disk with a diameter larger than the screw rod is coaxially fixed to one end of the screw rod, and the limiting disk is inserted in the slot and displaced along the length direction of the slot; a positioning block 2 is fixed at one end of the rod 1 and the rod 2 that are away from each other, and the longitudinal section of the positioning block 2 is T-shaped, and the limit block is provided with a positioning groove 2 for horizontal insertion of the positioning block 2 along the radial direction of the pipeline.

[0016] By adopting the above technical solution, by utilizing the plug-in cooperation between positioning block one and positioning groove one, and the plug-in cooperation between positioning block two and positioning groove two, the telescopic rod and the rotating rod can be detached from the pipeline. When the pipelines are connected, the telescopic rod and the rotating rod are placed between adjacent pipelines, so that it is convenient to assemble multiple sections of pipelines according to actual needs, or only set up a single section of pipeline to realize coal sampling.

[0017] Optionally, the conveyor belt includes a frame, a conveyor roller rotatably connected to the frame, and a belt wound around the conveyor roller, one of the conveyor rollers is connected to a power member; a plurality of convex strips are arranged at intervals on the surface of the belt, and the material holding bucket is placed between adjacent convex strips.

[0018] By adopting the above technical solution, the power part drives the belt conveyor, the convex strip can abut the side wall of the material bucket to conveniently drive the material bucket to move forward, and the material bucket can be switched to hold the coal in the sampling tube; thus, the staff can collect multiple samples and then transport several material buckets to the detection point for detection again, and can collect coal samples from different time periods or different locations for detection, which helps to improve the accuracy of the detection results.

[0019] Optionally, a positioning member is also provided on the frame, and the positioning member includes a positioning rod and a telescopic member for driving the positioning rod to move. During the displacement of the positioning rod, the positioning rod abuts against the side of the convex strip facing the belt conveying direction, and when the positioning rod abuts against the convex strip, the corresponding material holding bucket is directly below the sampling tube.

[0020] By adopting the above technical solution, since the general conveyor belt uses a motor to drive the belt conveyor, the telescopic part is used to drive the positioning rod to move so that it can abut against the convex bar, which can prevent the belt from continuing to convey forward due to the inertia of the motor drive, and ensure that the material bucket can accurately stop one by one directly under the sampling tube, thereby facilitating the loading of coal in the material bucket.

[0021] Optionally, the telescopic member adopts a cylinder, the cylinder body of the cylinder is fixed on the frame, and the telescopic shaft of the cylinder is fixed to the positioning rod.

[0022] Optionally, scale lines are provided on adjacent side walls of adjacent pipes along the axial direction.

[0023] By adopting the above technical solution, when changing the distance between adjacent pipes to meet different sampling volumes, the staff can more accurately adjust the distance between adjacent pipes according to the indication of the scale lines.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. Use a multi-section pipeline setting, and set valves on the pipelines accordingly to form a sampling space between adjacent valves. When sampling, the upper valve is opened and the lower valve is closed. During the coal transportation process, it falls into the sampling tube under the action of its own weight and fills it up. Then the upper valve is closed and the lower valve is opened, and the coal in the sampling tube falls into the material storage barrel below, realizing automatic sampling. Since the space between adjacent valves can be fixed, the sampling volume can be kept almost consistent for multiple times, and the accuracy of subsequent sampling can be guaranteed.

[0026] 2. The spacing between adjacent pipes can be adjusted and fixed by limiters. The size of the sampling space can be changed according to the sampling volume requirements, making it convenient to sample different amounts of coal. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the automatic sampling equipment used for coal quality detection in the embodiment of the present application.

[0028] Figure 2 yes Figure 1 Schematic diagram of the structure of the sampling tube.

[0029] Figure 3 yes Figure 2 Enlarged schematic diagram of part A.

[0030] Figure 4 yes Figure 2 Schematic diagram of the connection structure between the telescopic rod and the pipeline.

[0031] Figure 5 yes Figure 1 Schematic diagram of the enlarged portion B.

[0032] Explanation of the reference numerals in the accompanying drawings: 1. sampling tube; 11. pipeline; 2. gate valve; 3. material holding part; 31. conveyor belt; 311. frame; 312. belt; 313. stepper motor; 32. material holding barrel; 4. limiting part; 41. limiting block; 42. rotating rod; 43. positioning block one; 44. positioning slot one; 45. telescopic rod; 451. rod one; 452. rod two; 46. positioning block two; 47. positioning slot two; 48. screw rod; 49. support rod; 410. hand wheel; 411. drive block; 412. slot; 413. limiting disc; 5. convex strip; 7. cylinder; 8. positioning rod. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-5 This application is described in further detail.

[0034] The present application embodiment discloses an automatic sampling device for coal quality detection, referring to Figure 1 and 2, including a sampling tube 1 and a material container 3. The sampling tube 1 includes a plurality of pipes 11, each of which is provided with a gate valve 2. The sampling tube 1 can be provided with different numbers of pipes 11 according to actual sampling requirements. In this embodiment, the sampling tube 1 is composed of two pipes 11, and the lower pipe 11 is sleeved on the upper pipe 11; the end of the upper pipe 11 away from the other pipe 11 is fixedly connected to the lower end of the screw conveyor through a flange; and the adjacent pipes 11 are fixed by a stopper 4. When the coal is transported in the screw conveyor, it falls into the sampling tube 1 under the action of its own weight. At this time, the state of the gate valve 2 is that the upper gate valve 2 is open and the lower gate valve 2 is closed, and then the upper gate valve 2 is closed and the lower gate valve 2 is opened, then the coal in the sampling tube 1 falls into the material container 3 for temporary storage, which is convenient for transportation to subsequent detection.

[0035] Reference Figure 2 and 3 The above-mentioned limiting member 4 includes a limiting block 41, and a group of limiting blocks 41 are respectively provided for each section of the pipeline 11. The limiting blocks 41 are fixed to an adjacent section of the pipeline 11, and the limiting blocks 41 are arranged in an annular shape; a positioning groove 44 connected to the outer peripheral wall is provided on one side adjacent to the two limiting blocks 41, and the longitudinal section of the positioning groove 44 of the upper limiting block 41 is T-shaped, and the longitudinal section of the lower positioning groove 44 is an inverted T-shaped; positioning blocks 43 are respectively inserted into the two positioning grooves 44, and the positioning blocks 43 are arranged in the same shape as the positioning grooves 44; the adjacent surfaces of the two positioning blocks 43 are respectively connected to the rotating rods 42 through the rotating shaft, and the ends of the rotating rods 42 away from the positioning blocks 43 are respectively connected to the same driving block 411 through the rotating shaft, and the driving block 411 is kept vertically arranged , and a screw rod 48 is passed through the middle of the driving block 411, the screw rod 48 is threadedly matched with the driving block 411, and is arranged radially parallel to the pipe 11, and a handwheel 410 is fixed on the side of the screw rod 48 away from the pipe 11; a support rod 49 is fixed on the upper end of the positioning block 43 below, and the support rod 49 is provided with a slot 412 along its own height direction, and the cross-section of the slot 412 is a T-shaped setting with an opening toward the driving block 411 narrower than the other side, and a limiting disc 413 is coaxially fixed to one end of the screw rod 48 toward the pipe 11, and the diameter of the limiting disc 413 is larger than the diameter of the screw rod 48, and is the same as the maximum width of the slot 412, and the limiting disc 413 is inserted into the slot 412, so that the screw rod 48 can slide vertically along the slot 412 while the circumferential rotation of the screw rod 48 relative to the support rod 49 is realized. When adjacent pipes 11 are plugged together, two positioning blocks 43 are correspondingly plugged into positioning grooves 44 to limit the adjacent pipes 11. When the spacing between the pipes 11 needs to be adjusted, only the screw rod 48 needs to be rotated.

[0036] Reference Figure 2 and 4In order to ensure that the adjacent pipes 11 slide against each other better, the adjacent surfaces of the two limit blocks 41 are symmetrically provided with positioning grooves 47 along the axis of the pipe 11, and the positioning grooves 47 and the positioning grooves 44 are arranged in the same shape; the positioning grooves 47 are correspondingly inserted with positioning blocks 46, and the positioning blocks 46 and the positioning grooves 47 are arranged in the same shape; a telescopic rod 45 is connected between the two positioning blocks, and the telescopic rod 45 includes a rod 451 and a rod 452, the upper end of the rod 451 is fixed to the upper positioning block 46, the lower end of the rod 452 is fixed to the lower positioning block 46, and the rod 452 is sleeved on the outside of the rod 451, and the rod 451 and the rod 452 can be completely separated.

[0037] In order to more accurately adjust the displacement distance of adjacent pipes 11 , a scale line is provided on a section of the outer wall of the upper pipe 11 under the limit block 41 , and the scale line is provided along the axial direction of the pipe 11 .

[0038] Reference Figure 1 and 5 The material holding member 3 comprises a conveyor belt 31 and a material holding barrel 32. The conveyor belt 31 comprises a frame 311. A plurality of conveyor rollers are rotatably connected to the frame 311. A belt 312 is wound around the outer side of the conveyor tube. A power member is connected to the conveyor roller. The power member adopts a stepper motor 313. The stepper motor 313 is fixed to the frame 311. The output shaft of the stepper motor 313 is coaxially fixed with the corresponding conveyor roller. A plurality of convex strips 5 are arranged at intervals on the surface of the belt 312 along its own conveying direction. The material holding barrel 32 is placed between adjacent convex strips 5. Therefore, during the conveying process of the belt 312, the convex strips 5 abut against the outer wall of the material holding barrel 32, driving the material holding barrel 32 to convey forward.

[0039] In this embodiment, in order to ensure that the material buckets 32 can be located one by one directly below the sampling tube 1 to facilitate material storage work; a positioning member is also provided on the frame 311, and the positioning member includes a telescopic member and a positioning rod 8, wherein the telescopic member adopts a cylinder 7, and the cylinder body of the cylinder 7 is fixed on the frame 311, and the telescopic axis of the cylinder 7 is coaxially fixed with the positioning rod 8; in this embodiment, two groups of cylinders 7 are provided, which are respectively located on both sides of the width direction of the frame 311, and the cylinder 7 drives the positioning rod 8 to extend and retract in the horizontal direction, and during the extension and retraction process of the positioning rod 8, it abuts against the side of the convex strip 5 toward the conveying direction of the belt 312; when the positioning rod 8 abuts against the convex strip 5, the corresponding material bucket 32 ​​is located directly below the sampling tube 1.

[0040] In this embodiment, the interval opening and closing time of the gate valve 2, as well as the opening and closing time of the stepper motor 313 and the cylinder 7 can be set, so that when the material in the sampling tube 1 falls into one of the material holding barrels 32, the lower gate valve 2 is closed, and the upper gate valve 2 is opened. At the same time, the cylinder 7 contracts, and the stepper motor 313 is started to drive the belt 312 to transport forward. Then the cylinder 7 extends to drive the next material holding barrel 32 to be transported to the bottom of the sampling tube 1. At this time, the stepper motor 313 is closed, and at the same time, the positioning rod 8 abuts against the corresponding convex strip 5.

[0041] The implementation principle of an automatic sampling device for coal quality detection in the embodiment of the present application is as follows: the upper pipe 11 is connected to the lower end of the screw conveyor through a flange, and then the lower pipe 11 is sleeved outside the upper pipe 11, and then the positioning block 1 43 and the positioning block 2 46 are respectively inserted into the positioning groove 1 44 and the positioning groove 2 47 to limit the adjacent pipes 11, and then according to the required sampling amount, the staff can manually drive the screw rod 48 to rotate to adjust the displacement of the adjacent pipes 11, and the space between the adjacent gate valves 2 can be clearly known according to the scale lines;

[0042] Then the lower gate valve 2 is closed and the upper gate valve 2 is opened, and the coal falls into the sampling tube 1 during transportation. Then, according to the set time, the upper gate valve 2 is closed and the lower gate valve 2 is opened, and the coal in the sampling tube 1 falls into the lower material storage bucket 32. Then, the lower gate valve 2 is closed and the upper gate valve 2 is opened. At the same time, after the cylinder 7 contracts, the stepper motor 313 starts to drive the belt 312 to transport forward, and the cylinder 7 extends again. When the stepper motor 313 drives the belt 312 to transport to the next material storage bucket 32 ​​under the sampling tube 1, the stepper motor 313 is turned off, waiting for the coal in the sampling tube 1 to fall into the corresponding material storage bucket 32; this reciprocating work is carried out to realize the sampling of coal in different time periods.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automatic sampling device for coal quality detection, characterized in that: The invention comprises a sampling tube (1) for communicating with the lower end of a conveyor, and a material holding member (3) located below the sampling tube (1), wherein the sampling tube (1) comprises at least two sections of pipes (11), adjacent pipes (11) are mutually sleeved and fixed via a stopper (4); each section of the pipe (11) is provided with a corresponding valve; the material holding member (3) comprises a conveyor belt (31) and a plurality of material holding barrels (32) located on the conveyor belt (31), wherein the material holding barrels (32) are located directly below the sampling tube (1) during the conveying process; The limiting member (4) comprises limiting blocks (41) arranged on adjacent pipes (11); adjacent surfaces of the two limiting blocks (41) are rotatably connected to rotating rods (42) respectively; the other ends of the two rotating rods (42) are rotatably connected to two ends of the same driving block (411); a screw rod (48) is passed through and threadedly connected to the driving block (411); the screw rod (48) is arranged parallel to the radial direction of the pipe (11), and one end of the screw rod is rotatably connected to the pipe (11) and vertically displaced along the pipe (11); The limiting member (4) further comprises a telescopic rod (45) located between adjacent limiting blocks (41), the telescopic rod (45) comprising a rod 1 (451) and a rod 2 (452) coaxially sleeved outside the rod 1 (451), the ends of the rod 1 (451) and the rod 2 (452) being away from each other are respectively connected to the limiting blocks (41); a support rod (49) is fixed on one of the limiting blocks (41), the support rod (49) is provided with a slot (412) with a T-shaped cross section along its height direction, a limiting disc (413) having a diameter larger than itself is coaxially fixed on one end of the screw rod (48), the limiting disc (413) is inserted into the slot (412) and moves along the length direction of the slot (412); One end of the rotating rod (42) that is away from each other is rotatably connected to a positioning block (43), the longitudinal section of the positioning block (43) is T-shaped, the limiting block (41) is provided with a positioning groove (44) along the radial direction of the pipeline (11) for horizontal insertion of the positioning block (43), and one end of the rod (451) and the rod (452) that is away from each other is fixed with a positioning block (46), the longitudinal section of the positioning block (46) is T-shaped, and the limiting block (41) is provided with a positioning groove (47) along the radial direction of the pipeline (11) for horizontal insertion of the positioning block (46).

2. The automatic sampling device for coal quality detection according to claim 1 is characterized in that: The conveyor belt (31) comprises a frame (311), a conveyor roller rotatably connected to the frame (311), and a belt (312) wound around the conveyor roller, one of the conveyor rollers being connected to a power member; a plurality of convex strips (5) are arranged at intervals on the surface of the belt (312), and the material holding bucket (32) is placed between adjacent convex strips (5).

3. The automatic sampling device for coal quality detection according to claim 2 is characterized in that: The frame (311) is also provided with a positioning member, which includes a positioning rod (8) and a telescopic member for driving the positioning rod (8) to move. During the displacement of the positioning rod (8), the positioning rod abuts against the side of the convex strip (5) facing the conveying direction of the belt (312). When the positioning rod (8) abuts against the convex strip (5), the corresponding material holding barrel (32) is located directly below the sampling tube (1).

4. The automatic sampling device for coal quality detection according to claim 3 is characterized in that: The telescopic member adopts a cylinder (7), the cylinder body of the cylinder (7) is fixed on the frame (311), and the telescopic shaft of the cylinder (7) is fixed to the positioning rod (8).

5. The automatic sampling device for coal quality detection according to claim 1 is characterized in that: Adjacent side walls of adjacent pipes (11) are provided with scale lines along the axial direction.

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