A sampler

Abstract

This invention discloses a sampler comprising a sampling cylinder, a drill rod assembly, a sample drop tube, a sample disposal tube, and a cutter. The sampling cylinder has an inner cavity, and a sample outlet is provided on the outer peripheral wall of the upper end of the sampling cylinder. The drill rod assembly is rotatably disposed within the inner cavity and includes a helical blade and a rotating shaft. The helical blade is sleeved on the outer peripheral side of the rotating shaft and fixedly connected to the rotating shaft. The sample drop tube is disposed outside the sampling cylinder, with one end communicating with the sample outlet. The length direction of the sample drop tube intersects the length direction of the sampling cylinder at an angle. A sample disposal outlet is provided on the sample drop tube, and the orientation of the sample disposal outlet is orthogonal to the length direction of the sampling cylinder. The sample disposal tube is disposed on one side of the sampling cylinder and communicates with the sample disposal outlet. The cutter is disposed inside the sample drop tube and moves between a sampling position and a disposal position. When the cutter is in the sampling position, the sample outlet and the sample disposal outlet are disconnected; when the cutter is in the disposal position, the sample outlet and the sample disposal outlet are connected. The sampler of this embodiment has good sampling effect.

Description

Technical Field

[0001] This invention relates to the field of coal sampling technology, and more specifically to a sampler. Background Technology

[0002] In production and trade processes, it is often necessary to sample stationary materials. Only by obtaining representative samples can accurate test results be obtained. In related technologies, samplers are used for initial sampling of stationary samples. However, the sampling effect of these samplers is poor, and the samples are not representative, thus affecting the test results. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention propose an extractor with good sampling performance.

[0005] The sampler in this embodiment of the invention includes:

[0006] A sampling tube having an inner cavity and a sample outlet on the outer peripheral wall at the upper end of the sampling tube;

[0007] A drill pipe assembly, the drill pipe assembly being rotatably disposed within the inner cavity, the drill pipe assembly including a helical blade and a rotating shaft, the helical blade being sleeved on the outer periphery of the rotating shaft and fixedly connected to the rotating shaft;

[0008] A sample drop tube is provided on the outside of the sampling tube. One end of the sample drop tube is connected to the sample outlet so that the sample collected by the sampling component falls into the sample drop tube. The length direction of the sample drop tube intersects the length direction of the sampling tube at an angle. The sample drop tube is provided with a sample discarding port, and the orientation of the sample discarding port is orthogonal to the length direction of the sampling tube.

[0009] A sample disposal tube is provided on one side of the sampling tube and is connected to the sample disposal port;

[0010] A cutter is disposed inside the sample drop tube and moves between a sampling position and a discard position to cut the sample that falls into the sample drop tube. When the cutter is in the sampling position, the sample outlet is disconnected from the discard port. When the cutter is in the discard position, the sample outlet is connected to the discard port.

[0011] The samplers collected by the samplers in this embodiment of the invention are more representative, and the samplers in this embodiment of the invention have advantages such as good sample reduction effect.

[0012] In some embodiments, the sampler further includes a sample retention component, which includes a sample retention hopper and a door, one end of the sample retention hopper being connected to the other end of the sample drop tube, and the door being movably disposed at the other end of the sample retention hopper.

[0013] In some embodiments, the sample retention assembly further includes a door adjustment device disposed outside the sample retention hopper. The door adjustment device includes a connecting component and a resetting component. One end of the connecting component is rotatably disposed on the sample retention hopper, and the other end of the connecting component is fixedly connected to the door. One end of the resetting component is connected to the sample retention hopper, and the other end of the resetting component is connected to the connecting component. The extending direction of the resetting component intersects the extending direction of the connecting component.

[0014] In some embodiments, the connecting assembly includes a first connector and a second connector, the upper end of the first connector is rotatably disposed on the sample hopper, the lower end of the first connector is connected to the upper end of the second connector, and the lower end of the second connector is fixedly connected to the hopper door.

[0015] In some embodiments, the sampler further includes a weighing sensor disposed between the lower end of the first connector and the upper end of the second connector.

[0016] In some embodiments, the sampler further includes a first drive unit connected to the upper end of the drill pipe assembly to drive the drill pipe assembly to rotate.

[0017] In some embodiments, the sampler further includes a third connector disposed inside the sampling cylinder, one end of which is fixedly connected to the first driving device, and the other end of which is fixedly connected to the spiral blade.

[0018] In some embodiments, the rotation center of the cutter is located on the side wall of the sample drop tube, and the rotation center is arranged away from the sample discard port.

[0019] In some embodiments, the sampler further includes a second driving device disposed on the outer periphery of the sample drop tube and connected to the end of the cutter away from the sample discard port.

[0020] In some embodiments, the sampler further includes a distance detection device disposed in the sampling cylinder to detect the distance between the surface of the sample to be sampled and the distance sensor. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the sampler (excluding the chamber door, the chamber door adjustment device, and the ear plate) according to an embodiment of the present invention.

[0022] Figure 2 yes Figure 1 A frontal view diagram.

[0023] Figure 3 yes Figure 1 The diagram is a right-side view.

[0024] Figure 4 This is a schematic diagram showing the connection between the second driving device 72 and the cutter 5 in an embodiment of the present invention.

[0025] Figure label:

[0026] Sampling tube 1; Sample outlet 11; Spiral blade 21; Rotating shaft 22; Sample drop tube 3; Sample discard port 31;

[0027] 4. Discard tube; 5. Cutter; 6. Sample retention assembly; 61. Sample retention hopper; 62. Door;

[0028] First connector 6311; Second connector 6312; Weighing sensor 6313;

[0029] Reset component 632; First limit switch 633; ​​Second limit switch 634;

[0030] First drive unit 71; protective shell 711; ear plate 712;

[0031] Second drive device 72; telescopic assembly 721; first connecting part 722; second connecting part 723;

[0032] Third connector 8;

[0033] Distance detection device 9. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below, with examples of the embodiments illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] The following is a reference appendix. Figures 1 to 4 The sampler 100 of this invention is described in an embodiment.

[0036] like Figures 1 to 3 As shown, the sampler 100 of this embodiment includes a sampling cylinder 1, a drill rod assembly, a sample drop tube 3, a sample discard tube 4, and a cutter 5. For ease of description, the following will use... Figure 1 The vertical direction is taken as the length direction of sampling tube 1.

[0037] The sampling tube 1 has an inner cavity, and a sample outlet 11 is provided on the outer peripheral wall at the upper end of the sampling tube 1. Specifically, the sampling tube 1 extends in the vertical direction, and the lower end of the sampling tube 1 is open to allow the sample to be tested to enter the sampling tube 1. The sampling tube 1 has only one sample outlet 11, which is located on the outer peripheral wall at the upper part of the sampling tube 1.

[0038] Optionally, the sample outlet 11 is rectangular, with a horizontal dimension of 150 mm and a vertical dimension of 200 mm. This allows the sample outlet 11 to accommodate multiple samples with a particle size of 50 mm passing through simultaneously, ensuring smooth discharge and preventing clogging. It is understood that the shape and size of the sample outlet 11 are not limited to this, as long as it ensures smooth discharge of the sample without clogging or residue.

[0039] The drill rod assembly is rotatably disposed within the inner cavity. The drill rod assembly includes a helical blade 21 and a rotating shaft 22. The helical blade 21 is sleeved on the outer periphery of the rotating shaft 22 and fixedly connected to the rotating shaft 22. Specifically, the drill rod assembly is used to collect and lift the sample to be tested, using the helical blade 21 to lift the collectable sample to the sample outlet 11.

[0040] A sample drop tube 3 is located on the outside of the sampling cylinder 1. One end of the sample drop tube 3 is connected to the sample outlet 11 so that the sample collected by the sampling component falls into the sample drop tube 3. The length direction of the sample drop tube 3 intersects the length direction of the sampling cylinder 1 at an angle. The sample drop tube 3 is provided with a sample discard port 31, and the orientation of the sample discard port 31 is orthogonal to the length direction of the sampling cylinder 1. A sample discard tube 4 is located on one side of the sampling cylinder 1 and is connected to the sample discard port 31. Specifically, the sample drop tube 3 intersects the sampling cylinder 1 at an angle, and the sample flowing out of the sample outlet 11 can flow out through the sample drop tube 3. The sample discard port 31 is located on the left or right side of the sample drop tube 3, and the sample discard tube 4 is located on the left or right side of the sampling cylinder.

[0041] Optionally, the cross-section of the sample drop tube 3 is rectangular. For example, the dimension of the sample drop tube 3 in the left-right direction is not less than the dimension of the discharge port 11 in the left-right direction, and the dimension of the sample drop tube 3 in the up-down direction is not less than the dimension of the discharge port 11 in the up-down direction.

[0042] Optionally, the cross-sectional area of ​​the sample drop tube 3 gradually decreases from top to bottom, which is beneficial for shaping the material flow.

[0043] The cutter 5 is located inside the sample drop tube 3 and moves between the sampling position and the discard position to cut the sample that falls into the sample drop tube 3. When the cutter 5 is in the sampling position, the sample outlet 11 is disconnected from the discard port 31. When the cutter 5 is in the discard position, the sample outlet 11 is connected to the discard port 31.

[0044] The cutter 5 is located inside the sample drop tube 3 and at the junction of the sample drop tube 3 and the waste sample tube 4. The cutter 5 moves with the rotation or reciprocating movement of the sample drop tube 3. For example, in the sampling position, the cutter 5 moves to one side of the sample drop tube 3 to facilitate the sample falling from the sample drop tube 3. In the waste sample position, the cutter 5 blocks the sample drop tube 3 and guides the sample to the waste sample tube 4 for discharge.

[0045] When the sampler 100 of this embodiment of the invention starts working, since the surface sample of the sample to be tested is not representative, the cutter 5 moves to the sample discarding position and introduces the surface sample of the sample to be tested into the sample discarding tube 4.

[0046] When the sampling tube 1 enters the deep layer of the sample to be tested, the cutter 5 moves to the sampling position, and the sample flows out from the lower end of the sample drop tube 3. Then, by controlling the cutter 5 to switch back and forth between the sampling position and the discard position, a part of the sample is guided to the discard tube 4, and the other part of the sample flows out from the lower end of the sample drop tube 3, thereby reducing the sample to be tested. By controlling the duration of the cutter 5 between the sampling position and the discard position, different reduction ratios can be obtained.

[0047] When the sampler 100 of this embodiment is working, on the one hand, all samples can only flow out through the sample outlet 11, and the sampler 100 can obtain samples from any position of the sample to be tested, making the samples more representative. On the other hand, the cutter 5 is movable, and the cutter 5 can be used to perform first-level reduction of the sample, improving sampling efficiency. Moreover, by controlling the dwell time of the cutter 5 between the sampling position and the discard position, not only can complete sample cross-sections be cut, but sample cross-sections of different lengths can also be cut, making the samples collected by the sampler 100 more representative.

[0048] In addition, the waste pipe has a simple structure and occupies little space.

[0049] Therefore, the samples collected by the sampler 100 in this embodiment of the invention are more representative, and the sampler 100 in this embodiment of the invention has advantages such as good sample reduction effect.

[0050] It should be noted that the angle between the sample drop tube 3 and the sampling cylinder 1 is determined according to the actual working conditions, but the national standard requires that the angle between the sample and the horizontal plane when it falls should not be less than 60 degrees. Optionally, the angle between the sampling cylinder 1 and the sample drop tube 3 can be 30 degrees, 20 degrees, etc.

[0051] In some embodiments, the sampler 100 further includes a sample retention component 6, which includes a sample retention hopper 61 and a door 62. One end of the sample retention hopper 61 is connected to the other end of the sample drop tube 3, and the door 62 is movably disposed at the other end of the sample retention hopper 61.

[0052] like Figure 2 and Figure 3As shown, the sample retention hopper 61 is rectangular in shape and includes an upper end, a lower end, a left side, and a right side. The lower end of the sample drop tube 3 is connected to the upper end of the sample retention hopper 61, and the lower end of the sample retention hopper 61 is provided with a door 62. The door 62 can be made of a flat plate or an arc-shaped plate. Preferably, the door 62 is arc-shaped, which is more conducive to the rotation and opening of the door 62.

[0053] When the sampler 100 is operating, the door 62 is closed to allow the sample retention hopper 61 to temporarily store samples, thus facilitating the sampler 100 to collect multiple samples at once and improving its sampling efficiency. After the sampler 100 has completed sampling, the operator can pull the door 62 forward to open it and retrieve the collected samples. Therefore, the sample retention hopper 61 assembly facilitates the temporary storage of collected samples, thereby improving the sampling efficiency of the sampler 100.

[0054] Optionally, the sampler 100 also includes a door 62 driver (not shown in the figure), which controls the opening and closing of the door 62, thereby improving the automation level of the sampler 100.

[0055] In other embodiments, the sample hopper 61 extends vertically, and the cross-sectional area S1 of the sample hopper 61 is the projected area of ​​the sample hopper 61 on the horizontal plane, while the cross-sectional area of ​​the sample drop tube 3 is S2, where S1 is greater than S2. Therefore, when the sampler 100 is operating, the sample hopper 61 can store a larger amount of sample, thereby improving the working efficiency of the sampler 100.

[0056] In some embodiments, the sample retention assembly 6 further includes a door adjustment device disposed outside the sample retention hopper 61. The door adjustment device includes a connecting component and a reset component 632. One end of the connecting component is rotatably disposed on the sample retention hopper 61, and the other end of the connecting component is fixedly connected to the door 62. One end of the reset component 632 is connected to the sample retention hopper 61, and the other end of the reset component 632 is connected to the first connecting component 6311. The extending direction of the reset component 632 intersects the extending direction of the connecting component.

[0057] like Figure 3 As shown, a door adjustment device is provided on the right side wall of the sample hopper 61. A connecting assembly extends vertically, with its upper end rotatably mounted on the sample hopper 61 and its lower end fixedly connected to the door 62. For example, a rotating shaft 22 is provided on the right side wall of the sample hopper 61, and a hinge hole is provided at the upper end of the connecting assembly. The hinge hole engages with the rotating shaft 22, thereby enabling the rotation of the connecting assembly. The lower end of the connecting assembly is connected to the door 62 by connection or welding.

[0058] The reset element 632 is located on the front or rear side of the connecting assembly. For example, the reset element 632 is a tension spring, located on the rear side of the connecting assembly. When the door 62 moves forward, it opens the sample hopper 61. The tension spring, under tension, pulls the door 62 backward to close the door 62. Alternatively, the reset element 632 is a compression spring, located on the front side of the connecting assembly. When the door 62 moves forward, it opens the sample hopper 61. The compression spring, under pressure, pushes the door 62 backward to close the door 62.

[0059] It should be noted that after the door 62 is closed, the reset member 632 still has tension or pressure, so that the door 62 maintains good sealing performance in the closed state, and avoids the sample falling out due to the movement of the door 62 when the sampler 100 is working, thus affecting the accuracy of the test results.

[0060] In some embodiments, the door adjustment device is further provided with two limit switches, which are electrically connected to the controller and are used to sense the state of the door 62.

[0061] like Figure 3 As shown, the two limit switches are a first limit switch 633 located on the front side of the connecting assembly and a second limit switch 634 located on the rear side of the connecting assembly.

[0062] When the door 62 is fully open, the connecting component can touch the first limit switch 633. After the first limit switch 633 senses the connecting component, it transmits a signal to the controller. The controller determines that the door 62 is fully open. If the sampling component rotates at this time, the controller will issue a fault prompt.

[0063] When the door 62 needs to be closed, the connecting component can touch the second limit switch 634. After the second limit switch 634 senses the connecting component, it transmits a signal to the controller. The controller determines that the door 62 is completely closed. If the second limit switch 634 does not sense the connecting component, the controller will issue a fault prompt.

[0064] In some embodiments, the connecting component includes a first connector 6311 and a second connector 6312. The upper end of the first connector 6311 is rotatably disposed on the sample hopper 61, the lower end of the first connector 6311 is connected to the upper end of the second connector 6312, and the lower end of the second connector 6312 is fixedly connected to the door 62.

[0065] For example, both the first connecting member 6311 and the second connecting member 6312 are plate-shaped. The first connecting member 6311 is located at the upper end of the second connecting member 6312, and the upper end of the first connecting member 6311 can rotate relative to the sample hopper 61. The upper end of the second connecting member 6312 is connected to the lower end of the first connecting member 6311, and the lower end of the second connecting member 6312 is fixedly connected to the door 62. Thus, the opening and closing of the door can be easily controlled using the first connecting member 6311 and the second connecting member 6312.

[0066] Optionally, the lower end of the first connecting member 6311 is provided with a first connecting plate (not shown in the figure), and the upper end of the second connecting member 6312 is provided with a second connecting plate (not shown in the figure). Both the first and second connecting plates are provided with through holes extending in the front-back direction, and a rotating shaft 22 is provided in the through holes. Thus, the first connecting member 6311 and the second connecting member 6312 are hinged together, and the first connecting member 6311 and the second connecting member 6312 do not move relative to each other in the front-back direction. This design can prevent the second connecting member 6312 from moving relative to the first connecting member 6311 in the front-back direction, thereby avoiding affecting the state of the compartment door 62.

[0067] In some embodiments, the sampler 100 further includes a weighing sensor 6313, which is disposed between the lower end of the first connector 6311 and the upper end of the second connector 6312.

[0068] A weighing sensor 6313 is provided between the first connector 6311 and the second connector 6312. Thus, when the sampler 100 is working, the sample falls onto the door 62. The weighing sensor 6313 can detect the mass of the sample in the sample hopper 61, thereby facilitating real-time monitoring of the mass change of the sample in the sample hopper 61, understanding the real-time effect of sampling and reduction, and at the same time, knowing the remaining space in the sample hopper 61, avoiding blockage of the sample drop tube 3 or overflow of the sample hopper 61.

[0069] In some embodiments, the sampler 100 further includes a first drive device 71 connected to the upper end of the drill pipe assembly to drive the drill pipe assembly to rotate.

[0070] like Figures 1 to 3 As shown, the first drive device 71 is fixedly connected to the upper end of the drill pipe assembly, thereby driving the drill pipe assembly to rotate using the first drive device 71.

[0071] Optionally, the first drive device 71 is an electric motor or a hydraulic motor.

[0072] In some other embodiments, a protective shell 711 is provided on the outer periphery of the first driving device 71, and the protective shell 711 is fixedly connected to the upper end of the sampling cylinder 1. For example, a flange is provided at the upper end of the sampling cylinder 1, and the flange is connected to the protective shell 711 by bolts.

[0073] Optionally, the protective housing 711 is provided with an ear plate 712 to facilitate connection of the sampler 100 to other devices. Alternatively, the protective housing 711 is provided with a position adjustment assembly to facilitate adjustment of the sampler 100's position on the connected device.

[0074] In some embodiments, the sampler 100 further includes a third connector 8, which is disposed inside the sampling cylinder 1. One end of the third connector 8 is fixedly connected to the first driving device 71, and the other end of the third connector 8 is fixedly connected to the spiral blade 21.

[0075] For example, the upper end of the third connector 8 is sleeved on the output shaft of the first drive device 71, and the third connector 8 is connected to the output shaft of the first drive device 71 by a pin or a key. The lower end of the third connector 8 is welded to the rotating shaft 22 of the drill pipe assembly. Thus, the structural strength between the rotating shaft 22 and the output shaft can be enhanced by using the third connector 8, thereby improving the working stability of the sampler 100.

[0076] The rotation center of the cutter 5 can be located on the left or right wall of the sample drop tube 3. When the rotation center of the cutter 5 is located on the left wall of the sample drop tube 3, that is, at the angle formed by the sample drop tube 3 and the waste cylinder, in other words, at the lower end of the waste outlet. With the rotation center of the cutter 5 located at the lower end of the waste outlet, the processing space is small, and it is inconvenient to install the cutter 5. In some embodiments, the rotation center of the cutter 5 is located on the side wall of the sample drop tube 3, and the rotation center is arranged away from the waste outlet 31. Figure 2 As shown, one end of the cutter 5 extends out of the sample drop tube 3, and the other end of the cutter 5 is located inside the sample drop tube 3. The rotation center of the cutter 5 is located on the right side wall of the sample drop tube 3. This facilitates the processing and installation of the cutter 5.

[0077] There are several ways to connect the cutter 5 to the right side wall of the sample drop tube 3. For example, the right side wall of the sample drop tube 3 is provided with a rotating shaft, and the cutter 5 is provided with a sleeve. The sleeve is fitted onto the rotating shaft to realize the rotation of the cutter 5 relative to the rotating shaft.

[0078] If the lower end of the cutter 5 is too long, when the cutter 5 moves from the sampling position to the discard position, the sample is likely to fall into the angle formed by the cutter 5 and the left side wall of the sample drop tube 3, which may cause the cutter 5 to jam. In some embodiments, when the cutter 5 moves to the discard position, the lower end of the cutter 5 is always higher than the lower edge of the discard port 31, which can prevent the cutter 5 from jamming.

[0079] In some embodiments, such as Figure 1 and Figure 2As shown, the sampler 100 also includes a second driving device 72, which is located on the outer periphery of the sample drop tube 3 and connected to the end of the cutter 5 away from the sample discard port 31. The second driving device 72 is used to control the operation of the cutter 5. By controlling the switching frequency of the cutter 5 between the sampling position and the sample discard position, as well as the pause time of the cutter 5 between the sampling position and the sample discard position, the sampler 5 can remove surface samples, collect samples at the required depth, adjust the reduction ratio, and control the quality of retained samples, thereby improving the representativeness of the collected samples.

[0080] Optionally, such as Figure 4 As shown, the second driving device 72 includes a telescopic assembly 721, a first connecting part 722, and a second connecting part 723. The first connecting part 722 is fixed to the sample drop tube 3. The telescopic assembly 721 is hinged to the first connecting part 722. The telescopic assembly 721 is provided with the second connecting part 722, and the telescopic assembly 721 is connected to the cutter 5 through the second connecting part 722. The cutter 5 is hinged to the second connecting part 722. Thus, the telescopic assembly 721 can drive the cutter 5 to rotate during the telescopic process.

[0081] Optionally, the telescopic assembly 721 is a hydraulic cylinder.

[0082] In some embodiments, the lower end of the cutter 5 is provided with an elastic section (not shown in the figure). In other words, the left end of the cutter 5 is provided with an elastic section, thereby preventing the cutter 5 from hitting the junction of the sampling tube 1 and the discard tube 4 during movement, thus avoiding damage to the cutter 5 and the second drive device 72 and improving the service life of the device.

[0083] In other embodiments, the outer edge of the cutter 5 is provided with an elastic section, thereby allowing the cutter 5 to form a seal with the inner wall of the sample drop tube 3, ensuring that the sample can fall into the sample drop tube 3 or the discard tube 4 as required. Moreover, the elastic section can prevent friction or collision between the cutter 5 and the inner wall of the sample drop tube 3, thus protecting the cutter 5.

[0084] In some embodiments, such as Figure 1 and Figure 2 As shown, the sampler 100 also includes a distance detection device 9, which is disposed on the sampling cylinder 1 to detect the distance between the surface of the sample to be sampled and the distance sensor.

[0085] The distance detection device 9 is located at the upper end of the sampling cylinder 1. When the sampler 100 is working, the distance detection device 9 can detect the distance between the surface of the sample to be sampled and the distance detection device 9. By subtracting this distance from the length of the sampling cylinder 1, the depth of the drill bit can be obtained, thus determining whether the sample collected is at the required depth. Therefore, the distance detection device 9 can accurately obtain samples at the required depth, thereby improving sampling efficiency.

[0086] It is understood that the location of the distance detection device 9 is not limited to this. In some other embodiments, the distance detection device 9 may also be located on the protective housing 711 of the driver.

[0087] The following describes in detail the working process of the sampler 100 of this embodiment of the invention, taking the collection of a primary sample of approximately 200 kg as an example. Assume that the time to collect the 200 kg sample is 55 s. The time for the sample to rise from the lower end of the sampling tube 1 to the sample outlet 11 is 5 s. Therefore, the time for the sample to flow in the sample drop tube 3 is approximately 50 s, and the mass of the material flow is approximately 4 kg / s. The specific working process of the sampler 100 is as follows:

[0088] S1. Adjust the cutter 5 to the sample disposal position and let it stand still for 10 seconds so that the surface sample is discharged through the sample disposal tube 4, thereby removing approximately 20 kg of surface sample.

[0089] S2. Adjust the cutter 5 to the sampling position, pause for 1 second, and let the sample fall into the sample retention component 6 through the sample drop tube, thereby cutting the sample mass of about 4 kg.

[0090] S3. Adjust the cutter 5 to the sample disposal position and let it stand still for 3.5 seconds to allow the sample to be discharged through the sample disposal tube 4, thereby discharging approximately 14 kg of sample.

[0091] S4. Repeat steps S2 and S3 until all material flow of the subsample is cut. The number of cuts is about 10. The sample in the sample retention component 6 is about 40 kg, thus completing the first-level reduction of the sample during the sampling process.

[0092] Furthermore, under different working conditions, users have different requirements for the thickness of the surface sample. For example, users may require the surface sample to be 20cm or 40cm thick. In step S1, by controlling the duration for which the cutter 5 remains stationary at the sample discard position, the removal of surface samples at different depths can be controlled.

[0093] In S1-S4, the sample reduction ratio is 40kg / 200kg, which is 1 / 5. If you want to change the reduction ratio, you can change the dwell time of the cutter 5 at the sampling or discarding position. For example, by extending the dwell time of the cutter 5 at the discarding position to 8s, while keeping other parameters unchanged, the material flow can be cut about 5 times, and the sample mass obtained in the retention component 6 is about 10kg. At this time, the reduction ratio is 20kg / 200kg, which is 1 / 10.

[0094] The sampler 100 of this embodiment can control the number of subsample cuts and the quality of the sample retained after reduction by adjusting relevant parameters, thereby adjusting the subsample reduction ratio. Furthermore, the sampler 100 of this embodiment can accommodate full-range adjustment of the reduction ratio from 0 to 1.

[0095] The sampler 100 of this invention has a cutter 5 that can cut a complete cross-section of the material flow, thereby improving the representativeness of the sample. The cutter 5 can be controlled to remove surface samples and collect deep samples. The reduction ratio can be adjusted over a wide range to effectively control the sample quality stored in the sample hopper 61 after reduction. The number of cuts can be adjusted to improve the precision of the reduction sample preparation. The cutter 5 has a compact structure and is not prone to coal blockage. With limit switches and a distance detection device 9, the sampler 100 has a high degree of automation, thereby improving its sampling efficiency and reducing human interference during sample collection, resulting in more representative samples.

[0096] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0097] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0098] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0099] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0100] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0101] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A sampler, characterized in that, include: A sampling tube having an inner cavity and a sample outlet on the outer peripheral wall at the upper end of the sampling tube; A drill pipe assembly, the drill pipe assembly being rotatably disposed within the inner cavity, the drill pipe assembly including a helical blade and a rotating shaft, the helical blade being sleeved on the outer periphery of the rotating shaft and fixedly connected to the rotating shaft; A sample drop tube is provided on the outside of the sampling tube. One end of the sample drop tube is connected to the sample outlet so that the sample collected by the sampling tube falls into the sample drop tube. The length direction of the sample drop tube intersects the length direction of the sampling tube at an angle. The sample drop tube is provided with a sample discarding port, and the orientation of the sample discarding port is orthogonal to the length direction of the sampling tube. A sample disposal tube is provided on one side of the sampling tube and is connected to the sample disposal port; A cutter is disposed inside the sample drop tube and moves between a sampling position and a discard position to cut the sample falling into the sample drop tube. When the cutter is in the sampling position, the sample outlet is disconnected from the discard port. When the cutter is in the discard position, the sample outlet is connected to the discard port, and the lower end of the cutter is higher than the lower edge of the discard port. The outer edge of the cutter is provided with an elastic section to form a seal between the cutter and the inner wall of the sample drop tube. A sample retention assembly includes a sample retention hopper, a door, a door adjustment device located outside the sample retention hopper, and a weighing sensor. The door adjustment device includes a connecting component and a resetting component. One end of the connecting component is rotatably mounted on the sample retention hopper, and the other end of the connecting component is fixedly connected to the door. One end of the resetting component is connected to the sample retention hopper, and the other end of the resetting component is connected to the connecting component. The extending direction of the resetting component intersects the extending direction of the connecting component. The connecting assembly includes a first connector and a second connector. The upper end of the first connector is rotatably mounted on the sample hopper. The lower end of the first connector is connected to the upper end of the second connector. The lower end of the second connector is fixedly connected to the hopper door. The weighing sensor is located between the lower end of the first connector and the upper end of the second connector; The door adjustment device is also equipped with two limit switches, which are electrically connected to the controller and are used to sense the state of the door. A distance detection device is provided on the sampling cylinder to detect the distance between the surface of the sample and the distance detection device. A first driving device is connected to the upper end of the drill pipe assembly to drive the drill pipe assembly to rotate. A third connector is disposed inside the sampling cylinder. One end of the third connector is fixedly connected to the first driving device, and the other end of the third connector is fixedly connected to the spiral blade.

2. The sampler according to claim 1, characterized in that, One end of the sample retention hopper is connected to the other end of the sample drop tube, and the hopper door is movably located at the other end of the sample retention hopper.

3. The sampler according to claim 1, characterized in that, The rotation center of the cutter is located on the side wall of the sample drop tube, and the rotation center is arranged away from the sample discard port.

4. The sampler according to claim 3, characterized in that, It also includes a second driving device, which is located on the outer periphery of the sample drop tube and connected to the end of the cutter away from the sample disposal port.

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