Belt conveyor sampling device and sampling method

Abstract

The invention discloses a belt conveyor sampling device and method, and belongs to the technical field of coal sampling, the belt conveyor sampling device comprises a driving shaft transversely and rotatably arranged at a discharging position of a belt conveyor, the driving shaft extends in the width direction of the belt conveyor, the driving shaft is connected with a driving unit, a plurality of supports are fixedly arranged on the driving shaft at intervals in the circumferential direction of the driving shaft, and sampling shovels are fixedly arranged on the supports; each sampling shovel comprises a first shovel body fixedly connected with the corresponding support, second shovel bodies are connected to the two sides of each first shovel body in a sliding mode, the second shovel bodies and the first shovel bodies are fixedly connected through fasteners, the multiple supports and the sampling shovels are distributed in the circumferential direction of the driving shaft at intervals, and coal on the belt conveyor can be sampled multiple times in the process that the driving shaft rotates one circle; under the condition that the belt conveyor continuously conveys coal, the sampling efficiency can be improved through a high-frequency sampling mode, the width of the sampling shovel can be adjusted according to needs, and the technical problem that an existing rotating disc type conveying belt sampler cannot uniformly and comprehensively sample in the width direction of the whole conveying belt is solved.

Description

Technical Field

[0001] The invention relates to the technical field of coal sampling, in particular to a belt conveyor sampling device and a sampling method. Background Art

[0002] At present, it is a key link to inspect the quality of individual coking coals of different brands and types, determine their adaptability and applicability in coal blending and stable improvement of coke quality, master their cold and hot strength indicators after coking, and conduct industrial small coke oven tests on them. The sampling quality and representativeness of individual coking coal entering the factory are the most basic factors in determining the results of small coke oven tests.

[0003] In order to improve the degree of automation of sampling and reduce the damage to the human body caused by mechanical equipment in manual sampling, a turntable conveyor belt sampler (such as publication number CN106198095A) has now appeared. The sampler is arranged below the conveyor belt outlet. The sampler includes a drive shaft and a hopper installed on the drive shaft. During the operation of the conveyor belt, the drive shaft drives the hopper to rotate around the axis, and then the hopper is used to receive part of the fallen coal to achieve the purpose of automatic material collection and improve the efficiency and safety of coal sampling.

[0004] Although the existing turntable conveyor belt sampler can sample at different positions in the width direction of the conveyor belt through the axial sliding of the bracket, the position adjustment of the hopper in the width direction of the conveyor belt is relatively limited. It is difficult to ensure uniform and comprehensive sampling in the entire width direction of the conveyor belt by relying solely on the axial movement of the bracket, resulting in the sample being unable to accurately represent the characteristics of the coal material in the entire conveyor belt. In addition, the bracket is connected to the drive shaft through a spline, and the spline mating point is prone to wear, which causes the bracket to rotate or move axially unsmoothly, affecting the normal flipping and sampling effect of the hopper. Summary of the invention

[0005] In order to solve the technical problem that the existing turntable conveyor belt sampler in the above-mentioned background technology has relatively limited position adjustment of the hopper in the width direction of the conveyor belt, and it is difficult to ensure uniform and comprehensive sampling in the entire width direction of the conveyor belt only by axial movement of the bracket, and it is impossible to ensure uniform and comprehensive sampling in the entire width direction of the conveyor belt, the present invention provides a belt conveyor sampling device and a sampling method.

[0006] The technical solution of the present invention is as follows: The present invention provides a sampling device for a belt conveyor, which includes a driving shaft rotatably arranged horizontally at the discharging position of the belt conveyor. The driving shaft extends along the width direction of the belt conveyor and is connected to a driving unit. A plurality of brackets are fixedly arranged at intervals along the circumferential direction of the driving shaft, and a sampling shovel is fixedly arranged on the brackets. The sampling shovel includes a first shovel body fixedly connected to the bracket. Second shovel bodies are slidably connected to both sides of the first shovel body, and the second shovel bodies are fixedly connected to the first shovel body through fasteners. The multiple brackets and sampling shovels distributed at intervals along the circumferential direction of the driving shaft can sample the coal material on the belt conveyor multiple times during one rotation of the driving shaft. In the case where the belt conveyor continuously conveys coal material, the high-frequency sampling method can improve the sampling efficiency, and the width of the sampling shovel can be adjusted according to needs, which can more comprehensively cover the characteristics of the coal material on the belt conveyor, making the finally obtained sample more representative; Slots are provided on both sides of the first shovel body, and the second shovel bodies are inserted into the slots. The slots can limit the displacement direction of the second shovel bodies during the sliding process, ensuring that they can only slide along the direction of the slots, avoiding the situation of shaking or deviation of the second shovel bodies during the width adjustment process, ensuring the structural stability of the sampling shovel in different width states, and further ensuring the smooth progress of the sampling process and the accuracy of the sampling effect.

[0007] Preferably, the tail of the sampling shovel is a temporary storage part, and the temporary storage part is fixedly installed on the bracket. One end of the temporary storage part is open and fixedly connected to a sampling part. The sampling part is of a U-shaped structure. During the process of the sampling shovel rotating with the driving shaft for sampling, the obtained coal material will first enter the temporary storage part, which can effectively prevent the coal material from directly spilling due to the rotation of the sampling shovel during the sampling process, ensuring the integrity of the coal material collection. The U-shaped sampling part facilitates the coal material to smoothly enter the sampling part under the action of gravity, and the U-shaped shape can make the coal material naturally gather inside after entering. At the same time, the U-shaped structure has good stability, and during the rotation of the sampling shovel, it can reduce the coal material from falling out of the sampling part due to shaking, further improving the accuracy and reliability of the sampling.

[0008] Preferably, a first connecting portion is fixedly provided on the back surface of the first shovel body, and a second connecting portion is fixedly provided on the back surface of the second shovel body. The first connecting portion and the second connecting portion are connected by a connecting rod. Connecting the first shovel body and the second shovel body through the first connecting portion, the second connecting portion and the connecting rod further enhances the stability of the connection between the two. During the sampling process of the sampling shovel rotation, it can effectively prevent the separation of the first shovel body and the second shovel body, ensure the normal progress of the sampling work, and at the same time facilitate the adjustment and fixation of the width of the sampling shovel. A threaded hole is provided on the first connecting portion, and a connecting hole coaxially arranged with the threaded hole is provided on the second connecting portion. One end of the connecting rod is threadedly connected to the threaded hole, and the other end of the connecting rod is inserted into the corresponding connecting hole. The threaded connection method makes the connection between the connecting rod and the first connecting portion tight and reliable. The other end is inserted into the connecting hole, which can realize the connection between the first connecting portion and the second connecting portion. After adjusting the width of the sampling shovel, the relative positions of the first shovel body and the second shovel body can be ensured to be fixed through the connecting rod, and the threaded connection is convenient for disassembly and replacement of components. When the connecting part is damaged, it is convenient for maintenance and replacement operations.

[0009] Preferably, the drive shaft and the sampling shovel are rotatably arranged in the protective cover. The protective cover is fixedly arranged on one side of the chute, and the protective cover is connected to the inside of the chute. The chute is provided with a sampling port. The protective cover can effectively prevent the coal material from splashing during the sampling process, ensure the cleanliness of the working environment and the safety of the operators. A baffle is movably installed at the sampling port, and the baffle can control the opening and closing state of the sampling port. When sampling is not required, the baffle is closed to prevent the coal material from overflowing from the sampling port and avoid affecting the material guiding function of the chute.

[0010] Preferably, the protective cover is provided with a protective door, which is convenient for operators to perform maintenance, cleaning and inspection work inside the protective cover and the taking and placing work of the receiving box. A receiving box is placed inside the protective cover, which can directly collect the coal material falling from the sampling shovel, facilitate the centralized processing of samples, and at the same time reduce the loss of coal material during the collection process and improve the work efficiency.

[0011] Preferably, a number of elastic protrusions are fixedly provided on the inner wall of the sampling shovel. When the sampling shovel rotates, the coal material inside will collide with the elastic protrusions as it rotates, causing the vibration of the sampling shovel itself. The elastic protrusions are evenly distributed inside the sampling shovel to ensure that the coal material frequently collides with the elastic protrusions during the rotation process, generating continuous vibration and effectively preventing the adhesion of the coal material.

[0012] Preferably, a chute is provided on the outer wall of the bottom of the first shovel body. The chute extends along the length direction of the first shovel body. An impact block is slidably arranged in the chute. During the rotation of the sampling shovel, the sampling shovel can be impacted by the impact block to generate vibration. And because elastic protrusions are arranged inside the sampling shovel, combined with the setting of the impact block, the vibration generated by the impact block can be effectively transmitted, avoiding the adhesion of the coal material in the sampling shovel and improving the sampling accuracy and efficiency.

[0013] Preferably, vibration pieces are fixedly arranged at both ends of the chute. The vibration pieces are of a spring piece structure. When the sampling shovel rotates, the impact block slides in the chute. Due to inertia, the impact block will impact the vibration pieces at both ends, causing the vibration pieces to deform. The elastic potential energy of the vibration pieces is then converted into the kinetic energy of the impact block, causing the impact block to move in the reverse direction and impact the vibration piece on the other side, and reciprocally impact to generate continuous vibration. The vibration is transmitted through the elastic protrusions, which can effectively shake off the coal adhered in the sampling shovel, ensuring the smooth progress of sampling and the representativeness of the sample. When sampling highly viscous coal, the continuous vibration can timely remove the adhered coal, ensuring the normal operation of the sampling shovel.

[0014] A sampling method includes placing the receiving box inside the protective cover. Among them, a receiving box with a specified capacity needs to be selected before placement; according to the width of the material flow, the width of the sampling shovel is adjusted. Specifically, the extended lengths of the second shovel bodies on both sides of the first shovel body are adjusted. During the adjustment process, the unity of the adjustment lengths of the two second shovel bodies is ensured, thereby completing the adjustment of the overall width of the sampling shovel to make it meet the width of the coal on the belt conveyor to achieve comprehensive sampling; the sampling shovel is driven to rotate around the shaft by the drive shaft, so that the sampling shovel moves upward from the bottom to receive the falling material. The coal accumulates in the temporary storage part under the action of gravity and vibration. When the sampling shovel is in an obliquely downward state, the coal slides out of the sampling shovel and falls into the receiving box. The multiple brackets and the sampling shovel circumferentially spaced along the drive shaft can sample the coal on the belt conveyor multiple times during one rotation of the drive shaft. In the case of continuous coal conveying by the belt conveyor, the high-frequency sampling method can improve the sampling efficiency, and the width of the sampling shovel can be adjusted according to needs, meeting the sampling requirements of different-width material flows, covering the characteristics of the coal on the belt conveyor more comprehensively, and making the finally obtained sample more representative.

[0015] Preferably, during the process of the sampling shovel receiving coal and moving upward, the coal moves into the temporary storage part under the influence of gravity. At the same time, the impact block moves along the chute towards the direction close to the drive shaft, and then impacts the sampling shovel. Through vibration, the coal in the sampling shovel gathers in the temporary storage part to prevent the coal from being thrown out; when the sampling shovel rotates downward, the coal moves out of the temporary storage part under the influence of gravity. At the same time, the impact block moves along the chute towards the direction away from the drive shaft, and then impacts the sampling shovel. Through vibration, the coal gathered in the temporary storage part in the sampling shovel slides outwards, avoiding the adhesion and residue of the coal. Since elastic protrusions are arranged in the sampling shovel, combined with the arrangement of the impact block, the vibration generated by the impact block can be effectively transmitted, avoiding the adhesion of coal in the sampling shovel, improving the accuracy and efficiency of sampling. During the rotation of the sampling shovel, the impact block can impact the sampling shovel to generate vibration, and since elastic protrusions are arranged in the sampling shovel, combined with the arrangement of the impact block, the vibration generated by the impact block can be effectively transmitted, avoiding the adhesion of coal in the sampling shovel, improving the accuracy and efficiency of sampling.

[0016] As can be seen from the above technical solutions, the advantages of the present invention are as follows: 1. A plurality of brackets and sampling shovels circumferentially spaced along the drive shaft can sample the coal material on the belt conveyor multiple times during one rotation of the drive shaft. In the case of continuous coal material transportation by the belt conveyor, the high-frequency sampling method can improve the sampling efficiency. Moreover, the width of the sampling shovel can be adjusted according to needs, which is suitable for the sampling requirements of different-width material flows, can more comprehensively cover the characteristics of the coal material on the belt conveyor, and makes the finally obtained sample more representative.

[0017] 2. During the process of the sampling shovel rotating with the drive shaft for sampling, the obtained coal material will first enter the temporary storage part, which can effectively prevent the coal material from directly spilling due to the rotation of the sampling shovel during the sampling process, ensuring the integrity of coal material collection. The U-shaped sampling part facilitates the smooth entry of coal material into the sampling part under the action of gravity, and the U-shaped shape enables the coal material to naturally gather inside after entering. At the same time, the U-shaped structure has good stability, and during the rotation of the sampling shovel, it can reduce the coal material from falling out of the sampling part due to shaking, further improving the accuracy and reliability of sampling.

[0018] 3. During the rotation of the sampling shovel, the sampling shovel can be impacted by the impact block to generate vibration. And due to the elastic protrusions provided inside the sampling shovel, in cooperation with the setting of the impact block, the vibration generated by the impact block can be effectively transmitted, preventing the coal material from adhering inside the sampling shovel and improving the sampling accuracy and efficiency.

[0019] 4. Vibration sheets are fixedly provided at both ends of the chute. The vibration sheets are of spring sheet structure. When the sampling shovel rotates, the impact block slides in the chute, and due to inertia, the impact block will impact the vibration sheets at both ends, causing the vibration sheets to deform. The elastic potential energy of the vibration sheets is then converted into the kinetic energy of the impact block, making the impact block move in the reverse direction and impact the vibration sheets on the other side, reciprocally impacting to generate continuous vibration. The vibration is transmitted through the elastic protrusions, which can effectively shake off the coal material adhering inside the sampling shovel, ensuring the smooth progress of sampling and the representativeness of the sample. When sampling coal material with high viscosity, the continuous vibration can timely remove the adhered coal material and ensure the normal operation of the sampling shovel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the present invention, the accompanying drawings required for description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of a belt conveyor sampling device according to one or more embodiments of the present invention; Figure 2Schematic structural diagram of a sampling shovel according to one or more embodiments of the present invention; Figure 3 Rear view structural diagram of a sampling shovel according to one or more embodiments of the present invention; Figure 4 Schematic structural diagram of the bottom of a sampling shovel according to one or more embodiments of the present invention; The components represented by the reference numerals in the figures are: 1, belt conveyor; 2, chute; 3, protective cover; 4, drive shaft; 5, bracket; 6, sampling shovel; 7, first shovel body; 8, second shovel body; 9, fastener; 10, sampling part; 11, temporary storage part; 12, first connecting part; 13, second connecting part; 14, connecting rod; 15, receiving box; 16, baffle; 17, elastic protrusion; 18, chute; 19, impact block; 20, vibrating piece. Detailed implementation manners

[0022] In order to make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the specific embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this patent.

[0023] As mentioned in the background art, for the existing rotary belt conveyor sampler, although it can sample at different positions in the width direction of the conveyor belt by axially sliding the bracket, the position adjustment of the sampling hopper in the width direction of the conveyor belt is relatively limited. It is difficult to ensure uniform and comprehensive sampling in the entire width direction of the conveyor belt only by the axial movement of the bracket, resulting in the sample being unable to accurately represent the characteristics of the coal material on the entire conveyor belt. Moreover, the bracket is connected to the drive shaft through a spline, and the spline mating part is prone to wear, resulting in unsmooth rotation or axial movement of the bracket, affecting the normal flipping of the sampling hopper and the sampling effect. To solve the above problems, a belt conveyor sampling device and a sampling method are proposed.

[0024] Embodiment 1 In a typical embodiment of the present invention, as Figure 1As shown in the figure, a sampling device for a belt conveyor is proposed, which is arranged at the discharging position of the belt conveyor 1, specifically at the chute 2 of the head of the belt conveyor 1, so as to realize sampling by means of the natural fall during the material transfer process. The sampling device for the belt conveyor includes: a driving shaft 4, which is horizontally rotatably arranged at the first pulley of the chute 2 at the head of the belt conveyor 1. The driving shaft 4 extends horizontally along the width direction of the belt conveyor. The driving shaft 4 is connected to a driving unit and can be driven by the driving unit to rotate around its axis. A plurality of brackets 5 are fixedly arranged at intervals along the circumferential direction of the driving shaft 4. A sampling shovel 6 is fixedly arranged at one end of each bracket 5 away from the driving shaft 4. Thus, the sampling shovel 6 can be used to receive the coal material conveyed by the belt conveyor 1 into the chute 2 to realize automatic sampling.

[0025] Specifically, a sampling port is opened on one side of the chute 2 to allow the sampling shovel 6 to extend into the chute 2 for sampling work. A protective cover 3 is fixedly connected to the side of the chute 2 where the sampling port is provided for protecting the sampling device; the protective cover 3 is provided with a protective door. A receiving box 15 is placed inside the protective cover 3. After the sampling shovel 6 picks up the coal material, it can transfer the coal material into the receiving box 15 to complete the automatic sampling of the coal material. After sampling is completed, the staff can open the protective door to take out the receiving box 15. The setting of the protective door can prevent the coal material from being thrown out during the sampling process and improve the work safety.

[0026] In this embodiment, a plurality of threaded holes are opened at intervals along the circumferential direction of the driving shaft 4. One end of the bracket 5 is fixedly connected to the driving shaft 4 by means of threaded connection, and the other end of the bracket 5 is fixedly connected to the sampling shovel 6 by means of threaded connection. Thus, when sampling is not required, the bracket 5 and the sampling shovel 6 can be disassembled and stored, and at the same time, it is also convenient for subsequent maintenance work.

[0027] In actual use, a baffle 16 can also be arranged at the position of the sampling port of the chute 2. The baffle 16 can be a rotating opening and closing structure or a pulling type. The sampling port can be blocked by the baffle 16 to prevent the sampling port from being opened during non-sampling work, so as to prevent the coal material from splashing out from the sampling port to ensure the material guiding function of the chute 2. The specific opening and closing structure of the baffle 16 can be selected according to actual needs, and specific details are not limited here too much.

[0028] It can be understood that the size of the sampling port can be determined according to actual design requirements, as long as it can allow the sampling shovel to turn into and out of the chute 2 without colliding with the chute 2. Specific details are not limited here too much.

[0029] The driving shaft 4 is rotatably arranged in the protective cover 3, and both ends of the driving shaft 4 are rotatably connected to the protective cover 3 through bearings. In this embodiment, one end of the driving shaft 4 is connected to the driving motor through a coupling, so that the driving motor can drive the driving shaft 4 to rotate around the axis, and the rotation direction of the driving shaft 4 is the same as / opposite to the running direction of the belt of the belt conveyor 1; specifically, when the driving shaft 4 is located on the side away from the belt conveyor 1, the driving shaft 4 and the belt conveyor 1 are arranged opposite to each other, and at this time, the rotation direction of the driving shaft 4 is the same as the running direction of the belt of the belt conveyor 1; when the driving shaft 4 is located on the side close to the belt conveyor 1 and the driving shaft 4 is located below the belt conveyor 1, the rotation direction of the driving shaft 4 is opposite to the running direction of the belt of the belt conveyor 1, thereby realizing the acceptance and transportation of coal.

[0030] It is understandable that in other embodiments, the drive shaft 4 can be driven by other means, such as using a pulley assembly connected to the drive structure of the belt conveyor 1, and directly driving the drive shaft 4 to rotate around the axis through the drive structure of the belt conveyor.

[0031] like Figure 2 As shown, the sampling shovel 6 is divided into a sampling part 10 and a temporary storage part 11 as a whole. The sampling part 10 is fixedly arranged at one end of the temporary storage part 11 away from the bracket 5. The temporary storage part 11 is fixedly installed on the bracket 5. The temporary storage part 11 is a shovel tail part. One end of the temporary storage part 11 is open. The open end of the temporary storage part 11 is connected to the sampling part 10, and the interior of the temporary storage part 11 is connected to the sampling part 10. The sampling part 10 is a shovel head part. The sampling part 10 is a U-shaped structure, which is used to receive the falling coal. The received coal can be temporarily stored in the temporary storage part 11 to avoid spilling during the rotation of the sampling shovel 6 around the axis (moving upward). When the sampling shovel 6 is tilted downward, the temporarily stored coal slides out and falls into the receiving box 15.

[0032] The sampling shovel 6 is a width-adjustable structure. Specifically, the sampling shovel 6 includes a first shovel body 7 and a second shovel body 8. The first shovel body 7 is provided with one, and the second shovel body 8 is provided with two. A second shovel body 8 is slidably connected to each side of the first shovel body 7. The second shovel body 8 is fixedly connected to the first shovel body 7 by fasteners 9 such as fixing bolts and screws. Therefore, the width of the sampling shovel 6 can be adjusted according to the actual width of the material flow to adapt to the sampling requirements of material flows of different widths and ensure uniform and comprehensive sampling. Among them, a plurality of bolt holes are spaced apart on the first shovel body 7 and the second shovel body 8 along their width direction for the installation of fasteners 9 such as fixing bolts and screws.

[0033] In this embodiment, the relative position between the bracket 5 and the drive shaft 4 is fixed, and the bracket 5 is not slidably connected to the drive shaft 4. In order to adapt to different material flow widths, the width of the sampling shovel 6 is adjusted, and the sliding connection between the bracket 5 and the drive shaft 4 is cancelled, and then the setting of structures such as splines is cancelled, thereby avoiding the wear problem at the spline fitting point, ensuring the smooth flipping of the sampling shovel 6 and the sampling effect.

[0034] During actual use, according to the width of the actual material flow, adjust the extension lengths of the second shovels 8 on both sides of the first shovel 7. During the adjustment process, the unity of the adjustment lengths of the two second shovels 8 should be ensured as much as possible to ensure the symmetry of the two second shovels 8.

[0035] In this embodiment, slots are provided on both sides of the first shovel 7, and one side of the second shovel 8 is inserted into the slots adjacent to the side edges of the first shovel 7. By changing the lengths of the two second shovels 8 extending outwards, the overall width of the sampling shovel 6 can be changed, so as to adapt to the sampling requirements of material flows with different widths. The slots can limit the displacement direction of the second shovel 8 during the sliding process, ensuring that it can only slide along the direction of the slots, avoiding the situation that the second shovel 8 shakes or deviates during the width adjustment process, ensuring the structural stability of the sampling shovel 6 in different width states, and thus ensuring the smooth progress of the sampling process and the accuracy of the sampling effect.

[0036] In order to further improve the limiting effect of the slots on the second shovel 8, a convex structure can also be provided in the slots along their extending directions, and a groove structure is fixedly provided at the corresponding position on the outer wall of the second shovel 8. Through the cooperation of the convex and the groove, the limiting effect on the second shovel 8 is realized, avoiding the situation that the second shovel 8 shakes or deviates during the width adjustment process, ensuring the structural stability of the sampling shovel 6 in different width states, and thus ensuring the smooth progress of the sampling process and the accuracy of the sampling effect.

[0037] It can be understood that in other embodiments, the two sides of the first shovel 7 can also be inserted into the second shovel 8. Specifically, a slot is provided on one side of the second shovel 8, and one side of the first shovel 7 is inserted into the slot of the corresponding second shovel 8. By changing the length of the first shovel 7 extending outwards, the overall width of the sampling shovel 6 can be changed, so as to adapt to the sampling requirements of material flows with different widths. The slots can limit the displacement direction of the second shovel 8 during the sliding process, ensuring that it can only slide along the direction of the slots, avoiding the situation that the second shovel 8 shakes or deviates during the width adjustment process, ensuring the structural stability of the sampling shovel 6 in different width states, and thus ensuring the smooth progress of the sampling process and the accuracy of the sampling effect.

[0038] In order to further improve the limiting effect of the slots, a convex structure can also be provided in the slots along their extending directions, and a groove structure is fixedly provided at the corresponding position on the outer wall of the first shovel 7. Through the cooperation of the convex and the groove, the limiting effect on the second shovel 8 is realized, avoiding the situation that the second shovel 8 shakes or deviates during the width adjustment process, ensuring the structural stability of the sampling shovel 6 in different width states, and thus ensuring the smooth progress of the sampling process and the accuracy of the sampling effect.

[0039] Such asFigure 3 As shown in the figure, in order to further improve the overall strength of the sampling shovel 6, a first connecting portion 12 is fixedly provided on the back surface of the first shovel body 7, and a second connecting portion 13 is fixedly provided on the back surface of the second shovel body 8. Threaded holes are provided horizontally on both sides of the first connecting portion 12, and a connecting hole is provided on the second connecting portion 13. The connecting hole is coaxially arranged with the threaded hole. Both sides of the first connecting portion 12 are respectively connected to the corresponding second connecting portion 13 through a connecting rod 14. The connecting rod 14 is provided with external threads to be connected to the threaded holes on the adjacent first connecting portion 12 in a threaded connection manner to achieve the fixed connection between the connecting rod 14 and the first connecting portion 12. The other end of the connecting rod 14 is inserted into the connecting hole of the corresponding second connecting portion 13. With the use of the fixing bolt 9, the stability of the connection between the first shovel body 7 and the second shovel body 8 can be further enhanced. During the sampling process of the rotation of the sampling shovel 6, the separation of the first shovel body 7 and the second shovel body 8 can be effectively prevented, ensuring the normal progress of the sampling work. At the same time, it is also convenient to adjust and fix the width of the sampling shovel 6.

[0040] It can be understood that in other embodiments, the connecting rod 14 can be set as telescopic structures such as an electric telescopic rod and a hydraulic telescopic rod to improve the automation degree of width adjustment. Specifically, it can be selected according to actual needs and will not be limited here too much.

[0041] As Figure 2 shown, a number of elastic protrusions 17 are fixedly provided on the inner side wall of the sampling shovel 6. The elastic protrusions 17 are hemispherical structures and are made of elastic materials such as polyurethane. When the sampling shovel 6 rotates, the coal material inside will collide with the elastic protrusions 17 during the rotation, causing the vibration of the sampling shovel 6 itself. The elastic protrusions 17 are evenly distributed inside the sampling shovel 6. The distance between adjacent elastic protrusions 17 is controlled within 5 - 10 cm, and the protrusion height is 2 - 3 cm to ensure that the coal material frequently collides with the elastic protrusions 17 during the rotation, generating continuous vibration and effectively preventing the adhesion of the coal material.

[0042] In order to improve the vibration effect, the sampling shovel 6 can also be integrally set as an asymmetric structure. Specifically, the thickness of the side of the sampling shovel 6 close to the drive shaft 4 is greater than the thickness of the side of the sampling shovel 6 far from the drive shaft 4. When the sampling shovel 6 rotates with the drive shaft 4, due to the center of gravity not being on the axis of rotation, an unbalanced force will be generated, thereby causing vibration and effectively shaking off the adhered coal material.

[0043] It should be noted that the overall asymmetry of the sampling shovel 6 in this embodiment refers to the asymmetry of the wall thickness in the length direction, rather than the asymmetry in the width direction. The two second shovel bodies 8 in the width direction of the sampling shovel 6 are symmetrically arranged.

[0044] As Figure 4As shown in the figure, a chute 18 is formed on the outer wall of the bottom of the first shovel body 7. A striking block 19 is slidably arranged in the chute 18. The chute 18 extends along the length direction of the bottom of the first shovel body 7. Thus, when the sampling shovel 6 rotates around the axis following the driving shaft 4, when the sampling shovel 6 rotates upward, the striking block 19 moves along the chute 18 towards the direction close to the driving shaft 4, and then strikes the sampling shovel 6. Through vibration, the coal material in the sampling shovel 6 gathers in the temporary storage part 11 to prevent the coal material from being thrown out; when the sampling shovel 6 rotates downward, the striking block 19 moves along the chute 18 towards the direction away from the driving shaft 4, and then strikes the sampling shovel 6. Through vibration, the coal material gathered in the temporary storage part 11 in the sampling shovel 6 slides outwards, avoiding the adhesion and residue of the coal material.

[0045] It can be understood that the chute 18 and the striking block 19 are matched through a groove and a convex structure to limit the position of the striking block 19 and prevent the striking block 19 from sliding out of the chute 18. The specific setting method can be determined according to the actual design requirements and will not be limited too much here.

[0046] Since an elastic protrusion 17 is arranged in the sampling shovel 6 and in cooperation with the arrangement of the striking block 19, the vibration generated by the striking block 19 can be effectively transmitted, avoiding the adhesion of the coal material in the sampling shovel 6 and improving the sampling accuracy and efficiency.

[0047] To further improve the vibration effect, vibration plates 20 are fixedly arranged at both ends of the chute 18. The vibration plates 20 are of a spring plate structure. When the sampling shovel 6 rotates, the striking block 19 slides in the chute 18. Due to inertia, the striking block 19 will strike the vibration plates 20 at both ends, causing the vibration plates 20 to deform. The elastic potential energy of the vibration plates 20 is then converted into the kinetic energy of the striking block 19, making the striking block 19 move in the reverse direction and strike the vibration plate 20 on the other side, striking back and forth to generate continuous vibration. The vibration is transmitted through the elastic protrusion 17, which can effectively shake off the coal material adhered in the sampling shovel 6, ensuring the smooth progress of sampling and the representativeness of the sample. When sampling coal materials with high viscosity, continuous vibration can timely remove the adhered coal material and ensure the normal operation of the sampling shovel 6.

[0048] It can be understood that in actual use, by replacing the spring plates with different elastic coefficients, the vibration frequency and amplitude of the striking block 19 can be changed to adapt to the sampling requirements of coal materials with different characteristics. For example, for coal materials with low viscosity, spring plates with small elastic coefficients are used to make the vibration amplitude of the striking block 19 small; for coal materials with high viscosity, spring plates with large elastic coefficients are used to increase the vibration amplitude and improve the coal cleaning effect. The specific selection of the elastic coefficient can be determined according to actual needs and will not be limited too much here.

[0049] Embodiment 2 In another typical implementation manner of the present invention, a sampling method is proposed, which adopts the belt conveyor sampling device in Embodiment 1. The specific process is as follows: When sampling is required, select the receiving bin 15 with a specified capacity, open the protective door and place the receiving bin 15 inside the protective cover 3, so that the receiving bin 15 is located on the side of the sampling shovel 6 away from the belt conveyor 1. The upper part of the receiving bin 15 is open to receive and hold the sampled coal transported by the sampling shovel 6; According to the width of the actual material flow, adjust the extending lengths of the second shovels 8 on both sides of the first shovel body 7. During the adjustment process, ensure the unity of the adjustment lengths of the two second shovels 8, and then complete the adjustment of the overall width of the sampling shovel 6 to make it meet the width of the coal on the belt conveyor 1, so as to achieve comprehensive sampling; Open the baffle 16, install the bracket 5 on the drive shaft 4, and install the sampling shovel 6 on the corresponding bracket 5. Start the drive motor, drive the drive shaft 4 to rotate around the axis by the drive motor, and then drive the sampling shovel 6 to rotate around the axis, so that the sampling shovel 6 moves upward from bottom to top to receive the falling material. The falling material conveyed from the belt conveyor 1 is received by the sampling shovel 6. The sampling shovel 6 drives the coal to move upward and makes an arc movement in the direction away from the belt conveyor 1. During this period, the coal accumulates in the temporary storage part 11 under the action of gravity and vibration. When the sampling shovel 6 is in a state of inclining downward, the coal slides out of the sampling shovel 6 and falls into the receiving bin 15 to complete the continuous automatic feeding work.

[0050] Among them, during the process of the sampling shovel 6 receiving the coal and moving upward, the coal moves into the temporary storage part 11 under the influence of gravity. At the same time, the impact block 19 moves along the chute 18 in the direction close to the drive shaft 4, and then impacts the sampling shovel 6. Through vibration, the coal in the sampling shovel 6 gathers in the temporary storage part 11 to prevent the coal from being thrown out; when the sampling shovel 6 rotates downward, the coal moves out of the temporary storage part 11 under the influence of gravity. At the same time, the impact block 19 moves along the chute 18 in the direction away from the drive shaft 4, and then impacts the sampling shovel 6. Through vibration, the coal gathered in the temporary storage part 11 in the sampling shovel 6 slides outwards, avoiding the adhesion and residue of the coal. Since the elastic protrusion 17 is provided in the sampling shovel 6, combined with the setting of the impact block 19, the vibration generated by the impact block 19 can be effectively transmitted, avoiding the adhesion of the coal in the sampling shovel 6 and improving the accuracy and efficiency of sampling.

[0051] Among them, during the impact process of the impact block 19, since the vibration pieces 20 are fixedly provided at both ends of the chute 18, due to inertia, the impact block 19 will impact the vibration pieces 20 at both ends, deforming the vibration pieces 20. The elastic potential energy of the vibration pieces 20 is then converted into the kinetic energy of the impact block 19, causing the impact block 19 to move in the reverse direction and impact the vibration piece 20 on the other side, impacting reciprocally to generate continuous vibration. The vibration is transmitted through the elastic protrusion 17, which can effectively shake off the coal adhered in the sampling shovel 6, ensuring the smooth progress of sampling and the representativeness of the sample. When sampling coal with high viscosity, the continuous vibration can timely remove the adhered coal and ensure the normal operation of the sampling shovel 6.

[0052] In this embodiment, during the rotation of the sampling shovel 6, the impact block 19 can impact the sampling shovel to generate vibration. Moreover, due to the provision of the elastic protrusion 17 inside the sampling shovel 6 and in cooperation with the arrangement of the impact block 19, the vibration generated by the impact block 19 can be effectively transmitted, preventing the coal material from adhering inside the sampling shovel 6 and improving the accuracy and efficiency of sampling.

[0053] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A belt conveyor sampling device, comprising: The drive shaft (4) is horizontally rotatably arranged at the discharging position of the belt conveyor (1), and is characterized in that the drive shaft (4) extends along the width direction of the belt conveyor (1), the drive shaft (4) is connected with a drive unit, and a plurality of brackets (5) are fixedly arranged at intervals along the circumferential direction of the drive shaft (4), and a sampling shovel (6) is fixedly arranged on the bracket (5); The sampling shovel (6) comprises a first shovel body (7) fixedly connected with the bracket (5), and second shovel bodies (8) are slidably connected to both sides of the first shovel body (7), and the second shovel bodies (8) are fixedly connected with the first shovel body (7) through fasteners (9).

2. The belt conveyor sampling device according to claim 1, characterized in that, The tail of the sampling shovel (6) is a temporary storage part (11), the temporary storage part (11) is fixedly installed on the bracket (5), one end of the temporary storage part (11) is open and fixedly connected with a sampling part (10), and the sampling part (10) is of a U-shaped structure.

3. The belt conveyor sampling device according to claim 1, characterized in that, A first connecting part (12) is fixedly arranged on the back surface of the first shovel body (7), a second connecting part (13) is fixedly arranged on the back surface of the second shovel body (8), and the first connecting part (12) and the second connecting part (13) are connected through a connecting rod (14).

4. The belt conveyor sampling device according to claim 1, wherein The drive shaft (4) and the sampling shovel (6) are rotatably arranged in a protective cover (3), the protective cover (3) is fixedly arranged on one side of the chute (2), and the protective cover (3) is communicated with the inside of the chute (2), and a sampling port is arranged on the chute (2).

5. The belt conveyor sampling device according to claim 4, wherein The protective cover (3) is provided with a protective door, and a receiving box (15) is placed inside the protective cover (3).

6. The belt conveyor sampling device according to claim 1, wherein, A plurality of elastic protrusions (17) are fixedly arranged on the inner wall of the sampling shovel (6).

7. The belt conveyor sampling device according to claim 1, characterized in that, A chute (18) is arranged on the outer wall of the bottom of the first shovel body (7), the chute (18) extends along the length direction of the first shovel body (7), and an impact block (19) is slidably arranged in the chute (18).

8. The belt conveyor sampling device according to claim 7, wherein, Vibrating plates (20) are fixedly arranged at both ends of the chute (18), and the vibrating plates (20) are of a spring plate structure.

9. A sampling method, which adopts the belt conveyor sampling device described in any one of claims 1-8, is characterized in that Including: Placing the receiving box (15) inside the protective cover (3); Adjusting the width of the sampling shovel (6) according to the width of the material flow; Driving the sampling shovel (6) to rotate around the shaft through the drive shaft (4) so that the sampling shovel (6) moves upward from the bottom to receive the falling material, and the coal material accumulates in the temporary storage part (11) under the action of gravity and vibration. When the sampling shovel (6) is in an obliquely downward state, the coal material slides out of the sampling shovel (6) and falls into the receiving box (15).

10. The sampling method according to claim 9, wherein During the process that the sampling shovel (6) receives the coal material and moves upward, the impact block (19) moves along the chute (18) towards the direction close to the drive shaft (4) and impacts the sampling shovel (6), and the coal material is gathered in the temporary storage part (11) through vibration; When the sampling shovel (6) rotates downward, the impact block (19) moves along the chute (18) towards the direction away from the drive shaft (4) and impacts the sampling shovel (6), and the coal material gathered in the temporary storage part (11) inside the sampling shovel (6) slides outwards through vibration.

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