Handheld coal sampling machine and method of using the same

Abstract

The present application discloses a handheld coal sampling machine, which belongs to the field of coal technology. It includes a handle; a first sampling assembly that can be spliced ​​and assembled with each other, the first sampling assembly can be fixedly installed at one end of the handle by bolts, and the first sampling assembly can sample the coal on the upper side; a second sampling assembly, the second sampling assembly can be fixedly installed at the other end of the first sampling assembly by bolts, and the second sampling assembly can sample the coal on both sides; a cleaning ring for cleaning the coal slag outside the first sampling assembly, which is magnetically attracted to one end of the handle. The present application utilizes multiple first sampling assemblies and second sampling assemblies to form a sampling piece of appropriate length, so that the sampling piece inserted into the coal pile can perform multi-point sampling, thereby increasing the discreteness between samples.

Description

Technical Field

[0001] The present application relates to the field of coal technology, and more specifically, to a handheld coal sampling machine and a method of using the same. Background Art

[0002] The gangue in coal contains ash, sulfur, oxides, etc. Too high a content of gangue will reduce the calorific value of coal combustion and increase the emission of harmful smoke. In order to ensure the quality and utilization value of coal, it is necessary to use sampling equipment to sample and test the coal.

[0003] The document with the prior art publication number CN109870322A provides a handheld coal sampler. The related technology of the device adopts a shaftless spiral blade design, which can greatly reduce the volume of the spiral elevator, reduce the weight of the entire sampler, and facilitate handheld operation. The sampler housing is pressed on the coal pile by the handheld handle, and the motor is started. The motor drives the reducer to rotate, thereby driving the spiral blade to rotate, and at the same time drives the auxiliary hollow drill bit to rotate, and the entire sampler is inserted into the coal pile. The spiral blade lifts the coal sample and finally sends it out from the discharge pipe to complete the sampling.

[0004] Although the above-mentioned prior art solution can achieve the relevant beneficial effects through the structure of the prior art, it still has the following defects: when the above-mentioned device samples coal, the samples taken out are continuous, which reduces the randomness of sampling and thus causes the collected samples to be unrepresentative.

[0005] In view of this, we propose a handheld coal sampling machine and a method for using the same. Summary of the invention

[0006] 1. Technical issues to be solved

[0007] The purpose of the present application is to provide a handheld coal sampling machine and a method of using the same, which solves the technical problems raised in the above-mentioned background technology and achieves the technical effect of multi-point sampling.

[0008] 2. Technical solution

[0009] The present application embodiment provides a handheld coal sampling machine, comprising:

[0010] Grip piece;

[0011] A first sampling assembly that can be assembled and spliced ​​with each other, the first sampling assembly can be fixedly mounted on one end of the handle by bolts, and the first sampling assembly can sample the coal on the upper side;

[0012] A second sampling assembly that can be assembled and spliced ​​with each other, the second sampling assembly can be fixedly installed on the other end of the first sampling assembly by bolts, and the second sampling assembly can sample coal on both sides;

[0013] A cleaning ring for cleaning coal slag outside the first sampling component is magnetically attracted to one end of the handle.

[0014] By adopting the above technical solution, a plurality of first sampling assemblies and second sampling assemblies are installed with each other to form a sampling piece of appropriate length, so that the first sampling assemblies and the second sampling assemblies inserted into the coal pile can perform multi-point sampling at multiple positions in the coal pile, thereby increasing the discreteness of the sampling points.

[0015] As an optional solution of the technical solution of the present application document, the gripping member includes an inserting tube that can be plugged and matched with one end of the first sampling component, a turning handle is fixedly installed on the outside of the inserting tube, and a rotating plug column is rotatably connected inside the inserting tube, and one end of the rotating plug column is slidably connected to a labor-saving torsion rod, and the first sampling component includes an outer retaining tube, the outer retaining tube can be plugged and matched with the inserting tube, and an inner sampling tube is rotatably matched inside the outer retaining tube, one end of the inner sampling tube is fixedly connected to the plug column, and the other end is fixedly connected to the inserting tube. The plug column and the rotating plug column can be plugged and matched with the plug tube, and directional arrows are fixedly installed at both ends of the inner collecting tube, a feed port is opened on the outside of the outer retaining tube, a plug-in arc plate is fixedly installed at one end of the outer retaining tube, and a plug-in groove is opened at the other end, the plug-in arc plate can be plugged and matched with the plug-in groove, and the inner wall of the other end of the outer retaining tube is symmetrically structured and fixedly connected with two elastic plates, the other end of the elastic plate is rotatably connected to a rigid clamping sleeve, and the end of the insert tube is fixedly connected with a connecting ear, and the rigid clamping sleeve is snap-fitted with the connecting ear.

[0016] By adopting the above technical solution, the rotating plug-in column is driven to rotate by utilizing the rotating force-saving torsion rod, so that the plug-in column docked in the first sampling assembly can drive the inner sampling tube that is plugged in and limited thereto to flip over, thereby fitting with the feed port of the outer retaining tube, so that the coal above the outer retaining tube can fall into the inner sampling tube through the feed port under the action of gravity, thereby completing the sampling operation; when the inner sampling tube rotates relative to the outer retaining tube, the connecting ear at the end of the plug-in column can elastically pull the elastic plate through the rigid sleeve, so as to facilitate the resetting of the rotating sampling inner sampling tube.

[0017] As an optional solution to the technical solution of the present application document, the second sampling component includes a docking ring that can be plugged and installed with the plug-in arc plate, one end of the docking ring is fixedly connected to a part barrel, a docking shaft is rotatably connected inside the part barrel, the docking shaft can be plugged and matched with a plug column, the external thread of the docking shaft is connected to two outward-expanded sampling parts, and the other end of the part barrel is detachably connected to a docking barrel, and the other end of the docking barrel is rotatably connected to a spiral drill bit.

[0018] By adopting the above technical solution, by plugging the docking shaft and the plug column together, the docking shaft can rotate coaxially with the inner mining tube, thereby driving the outward expansion sampling piece to expand outward to a limited extent, so as to sample both sides of the coal pile; the rotating spiral drill bit can improve the efficiency of inserting the device into the coal pile.

[0019] As an optional solution to the technical solution of the present application document, the outward expansion sampling part includes a threaded sleeve that slides with the inner wall of the part barrel in a limited position, the threaded sleeve is threadedly connected and adapted to the external thread fixedly installed on the outside of the docking shaft, and the outside of the threaded sleeve is symmetrically structured with two support rods hingedly installed, and the other end of the support rod is hingedly installed with an expansion plate, a storage groove is provided on the outside of the part barrel, the expansion plate is rotatably installed in the storage groove, and the other end of the expansion plate is slidably connected with a sampling barrel, a push-pull rod is provided between the sampling barrel and the support rod, and the two ends of the push-pull rod are respectively rotatably connected to the sampling barrel and the support rod.

[0020] By adopting the above technical solution, the threaded sleeve is used to slide in a limited position in the part barrel, thereby pushing the support rods hingedly installed on both sides of the threaded sleeve to rotate, and the expansion plate stored in the storage groove is pushed outward to open. At the same time, as the support rod rotates, the push-pull rod hingedly installed on one side pushes the sampling barrel retracted in the expansion plate outward and inserts it into the coal pile for sampling.

[0021] As an optional solution of the technical solution of the present application document, an elastic sheet is fixedly connected to one end of the storage groove.

[0022] By adopting the above technical solution, the elastic sheet installed in the receiving groove is used to elastically reset and tighten the receiving groove exposed by the outward expansion plate to protect it, thereby preventing coal slag from entering the receiving groove.

[0023] As an optional solution of the technical solution of the present application document, a battery is fixedly installed in the installation groove opened inside the docking tube, a control circuit element board electrically connected to one side of the battery is fixedly installed in the docking tube, a control motor is electrically connected to one side of the control circuit element board, and the control motor is fixedly connected to the spiral drill bit.

[0024] By adopting the above technical solution and utilizing the control motor to drive the spiral drill bit to rotate forward and reverse, it is not only convenient for the user to insert the device into the coal pile, but also convenient for the user to take the device out of the coal pile.

[0025] As an optional solution of the technical solution of the present application document, a charging connector is fixedly installed in the charging slot opened on the outside of the docking tube, the charging connector is electrically connected to the control circuit element board, and the rubber plug fixedly connected to the outside of the docking tube is plugged into the charging slot.

[0026] By adopting the above technical solution, the charging slot is sealed with a rubber plug, thereby preventing coal slag from entering the charging slot and causing charging obstruction.

[0027] As an optional solution of the technical solution of this application document, a method for using a handheld coal sampling machine includes the following steps:

[0028] S1. According to sampling requirements, a certain number of first sampling components and second sampling components are selected and assembled in sequence on one side of the handle;

[0029] S2, installing the spiral drill bit at the end of the second sampling assembly through the docking sleeve;

[0030] S3, transmitting a forward working signal to the control circuit component board through an external remote control device, thereby driving the spiral drill bit to rotate, keeping the feed port on the outside of the outer retaining tube facing upward, and inserting the spiral drill bit into the coal pile through the grip piece, and controlling the spiral drill bit to stop rotating after the first sampling assembly and the second sampling assembly are completely immersed in the coal pile;

[0031] S4, rotating the labor-saving torsion bar, so that the rotating plug column drives the inner sampling tube and the outer expansion sampling piece to take samples; after the sampling is completed, the labor-saving torsion bar is rotated in the opposite direction until it is reset, and then the spiral drill bit is controlled to reverse, and the first sampling assembly and the second sampling assembly are pulled outward through the grip piece.

[0032] 3. Beneficial effects

[0033] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0034] 1. The present application utilizes a combination of multiple first sampling components and second sampling components to enable the device to simultaneously sample multiple points inside a coal pile, thereby increasing the discreteness of the samples, reducing the continuity of the samples, and thereby increasing the reliability of coal mine quality detection.

[0035] 2. The present application utilizes the connection limit between the connecting ear and the rigid ferrule, so that when the inner sampling tube is installed inside the outer retaining tube and rotates, the rigid ferrule is elastically pulled by an elastic plate rotatably connected at one end, so as to facilitate the resetting of the rotating sampling inner sampling tube.

[0036] 3. The present application utilizes the limited sliding of the threaded sleeve and uses the support rod to push the expansion plate in the storage groove to rotate outward. When the support rod rotates, the push-pull rod hingedly installed on one side will push the sampling tube retracted on the inner side of the expansion plate to extend outward, so that the device can sample the coal on both sides after extending into the coal pile, and the elastic sheet installed in the storage groove elastically resets and tightens the storage groove exposed by the outward expansion plate to protect it, thereby blocking coal slag from entering the storage groove and avoiding the expansion plate from being affected by the internal rotation and reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the overall structure of a handheld coal sampling machine disclosed in a preferred embodiment of the present application;

[0038] Figure 2 This is a schematic diagram of the overall structure of a handle of a handheld coal sampling machine disclosed in a preferred embodiment of the present application;

[0039] Figure 3 This is a schematic diagram of the overall structure of the first sampling component of the handheld coal sampling machine disclosed in a preferred embodiment of the present application, which is disassembled from the left side and viewed from above;

[0040] Figure 4 This is a schematic diagram of the overall structure of the first sampling component of the handheld coal sampling machine disclosed in a preferred embodiment of the present application, which is disassembled and viewed from the bottom on the right side;

[0041] Figure 5 This is a schematic diagram of the overall internal structure of the second sampling component of the handheld coal sampling machine disclosed in a preferred embodiment of the present application;

[0042] Figure 6 This is a schematic diagram of the internal structure of the docking tube of a handheld coal sampling machine disclosed in a preferred embodiment of the present application;

[0043] Figure 7 This is a schematic diagram of the internal structure of the parts barrel of a handheld coal sampling machine disclosed in a preferred embodiment of the present application;

[0044] Figure 8 This is a schematic diagram of the overall structure of the outward expansion sampling component of the handheld coal sampling machine disclosed in a preferred embodiment of the present application;

[0045] Explanation of the numbers in the figure: 1. Handle; 2. First sampling component; 3. Second sampling component; 4. Cleaning ring; 5. Outward expansion sampling component; 11. Plug-in cylinder; 12. Rotating plug-in column; 13. Labor-saving torsion bar; 21. Outer stop cylinder; 22. Inner sampling cylinder; 23. Plug-in column; 24. Plug-in cylinder; 25. Elastic plate; 26. Rigid ferrule; 27. Connecting ear; 28. Plug-in arc plate; 31. Docking ring; 32. Part cylinder; 33. Docking shaft; 34. Docking cylinder; 35. Spiral drill bit; 36. External thread; 37. Storage groove; 38. Elastic sheet; 39. Control motor; 51. Threaded sleeve; 52. Support rod; 53. Expansion plate; 54. Sampling cylinder; 55. Push-pull rod. DETAILED DESCRIPTION

[0046] The present application is further described in detail below in conjunction with the accompanying drawings.

[0047] Reference Figure 1The handheld coal sampling machine described in the embodiment of the present application includes a first sampling assembly 2 that can be assembled and spliced ​​with each other. The first sampling assembly 2 can be fixedly installed at one end of the handle 1 by bolts. The first sampling assembly 2 can sample the coal on the upper side;

[0048] A second sampling assembly 3 that can be assembled and spliced ​​with each other, the second sampling assembly 3 can be fixedly installed on the other end of the first sampling assembly 2 by bolts, and the second sampling assembly 3 can sample coal on both sides;

[0049] A cleaning ring 4 for cleaning coal slag outside the first sampling assembly 2 is magnetically attracted to one end of the handle 1 .

[0050] The handheld coal sampling machine utilizes a plurality of first sampling assemblies 2 and second sampling assemblies 3 to be installed with each other to form a sampling piece of appropriate length, so that the first sampling assemblies 2 and second sampling assemblies 3 inserted into the coal pile can perform multi-point sampling at multiple positions in the coal pile, thereby increasing the discreteness of the sampling points.

[0051] Reference Figure 2 and Figure 1 The handle 1 in the handheld coal sampling machine recorded in the embodiment of the present application includes an insert tube 11 that can be plugged into and matched with one end of the first sampling component 2. A turning handle is fixedly installed on the outside of the insert tube 11, and a rotating plug column 12 is rotatably connected inside the insert tube 11. One end of the rotating plug column 12 is slidably connected to a labor-saving torsion rod 13.

[0052] Reference Figure 3 and Figure 4 The first sampling component 2 in the handheld coal sampling machine recorded in the embodiment of the present application includes an outer retaining tube 21, which can be plugged into and matched with the plug-in tube 11, and the inner mining tube 22 is rotatably matched inside the outer retaining tube 21, one end of the inner mining tube 22 is fixedly connected with a plug column 23, and the other end is fixedly connected with an insert tube 24, the plug column 23 and the rotating plug column 12 can be plugged into and matched with the insert tube 24, and directional arrows are fixedly installed at both ends of the inner mining tube 22, and a feed port is provided on the outside of the outer retaining tube 21, one end of the outer retaining tube 21 is fixedly installed with a plug-in arc plate 28, and the other end is provided with a plug-in groove, the plug-in arc plate 28 can be plug-in matched with the plug-in groove, and the inner wall of the other end of the outer retaining tube 21 is symmetrically structured and fixedly connected with two elastic plates 25, the other end of the elastic plate 25 is rotatably connected with a rigid clamping sleeve 26, the end of the insert tube 24 is fixedly connected with a connecting ear 27, and the rigid clamping sleeve 26 is snap-fitted with the connecting ear 27.

[0053] The handheld coal sampling machine utilizes the rotating force-saving torsion bar 13 to drive the rotating plug 12 to rotate, so that the plug 23 docked and installed in the first sampling component 2 can drive the inner mining tube 22 that is plugged and limited to flip over, thereby fitting with the feed port of the outer retaining tube 21, so that the coal above the outer retaining tube 21 can fall into the inner mining tube 22 through the feed port under the action of gravity, thereby completing the sampling operation; when the inner mining tube 22 rotates relative to the outer retaining tube 21, the connecting ear 27 at the end of the plug 24 can elastically pull the elastic plate 25 through the rigid sleeve 26, so as to facilitate the resetting of the rotating sampling inner mining tube 22.

[0054] Reference Figure 5 and Figure 6 In the handheld coal sampling machine recorded in the embodiment of the present application, the second sampling component 3 includes a docking ring 31 that can be plugged and installed with the plug-in arc plate 28, one end of the docking ring 31 is fixedly connected to a part barrel 32, and a docking shaft 33 is rotatably connected inside the part barrel 32. The docking shaft 33 can be plugged and matched with the plug column 23, and the external thread of the docking shaft 33 is connected to two outward-expanded sampling parts 5, and the other end of the part barrel 32 is detachably connected to a docking barrel 34, and the other end of the docking barrel 34 is rotatably connected to a spiral drill bit 35.

[0055] The handheld coal sampling machine, by plugging and matching the docking shaft 33 with the plug column 23, allows the docking shaft 33 to coaxially rotate with the inner mining tube 22, thereby driving the outward expansion sampling member 5 to limit the outward expansion, so as to sample both sides of the coal pile; the rotating spiral drill bit 35 is set to improve the efficiency of the device being inserted into the coal pile.

[0056] Reference Figure 8 and Figure 5 The external expansion sampling part 5 in the handheld coal sampling machine recorded in the embodiment of the present application includes a threaded sleeve 51 that slides with the inner wall of the part barrel 32, the threaded sleeve 51 is threadedly connected and adapted to the external thread 36 fixedly installed on the outside of the docking shaft 33, and the outside of the threaded sleeve 51 is symmetrically structured and hingedly installed with two support rods 52, and the other end of the support rod 52 is hingedly installed with an expansion plate 53, a receiving groove 37 is provided on the outside of the part barrel 32, the expansion plate 53 is rotatably installed in the receiving groove 37, and the other end of the expansion plate 53 is slidably connected with a sampling barrel 54, a push-pull rod 55 is provided between the sampling barrel 54 and the support rod 52, and the two ends of the push-pull rod 55 are respectively rotatably connected to the sampling barrel 54 and the support rod 52, and one end of the receiving groove 37 is fixedly connected with an elastic sheet 38.

[0057] The handheld coal sampling machine utilizes the threaded sleeve 51 to slide within the part barrel 32, thereby pushing the support rods 52 hingedly installed on both sides of the threaded sleeve 51 to rotate, and pushing the expansion plate 53 stored in the storage groove 37 outward to open. At the same time, as the support rod 52 rotates, the push-pull rod 55 hingedly installed on one side thereof pushes the sampling barrel 54 contracted in the expansion plate 53 outward and inserts it into the coal pile for sampling; the elastic sheet 38 arranged in the storage groove 37 elastically resets and tightens the storage groove 37 exposed by the outward expansion plate 53 to prevent coal slag from entering the storage groove 37.

[0058] Reference Figure 6 and Figure 5 In the handheld coal sampling machine recorded in the embodiment of the present application, a battery is fixedly installed in the installation groove opened inside the docking tube 34, a control circuit element board electrically connected to one side of the battery is fixedly installed in the docking tube 34, a control motor 39 is electrically connected to one side of the control circuit element board, the control motor 39 is fixedly connected to the spiral drill bit 35, and a charging connector is fixedly installed in the charging groove opened outside the docking tube 34, the charging connector is electrically connected to the control circuit element board, and the rubber plug fixedly connected to the outside of the docking tube 34 is plugged into the charging groove.

[0059] The handheld coal sampling machine, by utilizing the control motor 39 to drive the spiral drill bit 35 to rotate forward and reversely, can not only facilitate the user to insert the device into the coal pile, but also facilitate the user to take the device out of the coal pile; the provided rubber plug can seal the charging slot to prevent coal slag from entering the charging slot and causing charging obstruction.

[0060] Reference Figure 1-8 A method for using a handheld coal sampling machine in the embodiment of the present application comprises the following steps:

[0061] S1. According to sampling requirements, a certain number of first sampling components 2 and second sampling components 3 are selected and assembled in sequence on one side of the handle 1;

[0062] S2, installing the spiral drill bit 35 at the end of the second sampling assembly 3 through the docking sleeve 34;

[0063] S3, transmit a forward working signal to the control circuit element board through an external remote control device, thereby driving the spiral drill bit 35 to rotate, keep the feed port on the outside of the outer retaining tube 21 facing upward, and insert the spiral drill bit 35 into the coal pile through the grip 1. After the first sampling assembly 2 and the second sampling assembly 3 are completely immersed in the coal pile, control the spiral drill bit 35 to stop rotating;

[0064] S4, rotate the labor-saving torsion bar 13, so that the rotating plug column 12 drives the inner sampling tube 22 and the outward expansion sampling member 5 to take samples; after the sampling is completed, the labor-saving torsion bar 13 is rotated in the opposite direction until it is reset, and then the spiral drill bit 35 is controlled to reverse, and the first sampling component 2 and the second sampling component 3 are pulled outward through the handle 1.

[0065] Working principle: First, according to the sampling requirements, select a certain number of first sampling components 2 and second sampling components 3 for splicing and assembly in sequence; the specific installation method is to first point the arrow on the outside of the inner sampling tube 22 in the first sampling component 2 to the direction of the feed port of the outer retaining tube 21 in the first sampling component 2 to be connected, and then connect the multiple first sampling components 2 to be installed through the plug column 23 and the plug tube 24, and make the plug arc plate 28 plug and match with the plug groove, and then fix and limit the two outer retaining tubes 21 that have been connected by bolts, so as to realize the assembly of multiple first sampling components 2;

[0066] The first sampling assembly 2 and the second sampling assembly 3 are spliced ​​by plugging and matching the plug column 23 with the docking shaft 33, and plugging and matching the plug arc plate 28 at the end of the outer stop tube 21 with the docking plug ring 31, and then fixing the two with bolts, thereby realizing the splicing of the first sampling assembly 2 and the second sampling assembly 3;

[0067] After the first sampling assembly 2 and the second sampling assembly 3 are assembled, the plug-in tube 11 of the grip 1 is plugged into the outer stop tube 21 at the end, and the rotating plug column 12 is plugged into the plug tube 24, and finally the spiral drill bit 35 is installed at the end of the second sampling assembly 3 through the docking tube 34;

[0068] Then, the feed opening on the outside of the outer retaining cylinder 21 is kept facing upward, and a forward working signal is transmitted to the control circuit component board through an external remote control device, thereby controlling the motor 39 to drive the spiral drill bit 35 to rotate and drill into the coal pile. When the spiral drill bit 35 drives the first sampling component 2 and the second sampling component 3 to completely immerse in the coal pile, the spiral drill bit 35 is controlled to stop rotating;

[0069] Next, the operator rotates the labor-saving torsion bar 13 in the gripping member 1 clockwise. At this time, the rotating labor-saving torsion bar 13 drives the rotating plug post 12 to rotate, thereby driving the inner collection tube 22 and the docking shaft 33 to rotate synchronously.

[0070] The rotating inner mining tube 22 makes the opening on one side overlap with the feed port on the outside of the outer retaining tube 21, so that the coal above the feed port can fall into the inner mining tube 22 through the feed port to achieve sampling and collection. During the rotation of the inner mining tube 22 relative to the outer retaining tube 21, the connecting ear 27 fixedly connected to the inner mining tube 22 will bend by stretching the elastic plate 25 through the rigid sleeve 26;

[0071] When the docking shaft 33 rotates, the external thread 36 fixedly connected to the outside thereof will push the threaded sleeve 51 which is slidably limited in the part barrel 32 to move forward, and push the support rod 52 hinged thereto forward, so that the support rod 52 can push the expansion plate 53 hingedly installed on the outside of the part barrel 32 to expand outward, and during the flipping process of the support rod 52, the push-pull rod 55 hingedly installed on one side thereof will push the sampling barrel 54 stored on the inner side of the limited expansion plate 53 to extend outward, thereby sampling both sides of the inside of the coal mine; when the expansion plate 53 rotates outward, the elastic sheet 38 installed in the receiving groove 37 elastically contracts to assist in blocking the receiving groove 37 and prevent external coal slag from entering the receiving groove 37;

[0072] After sampling is completed, the labor-saving torsion rod 13 is rotated in the reverse direction, so that the rotating plug column 12 drives the inner sampling tube 22 and the extended sampling member 5 after sampling to return to their original positions, and then the spiral drill bit 35 is controlled to reverse, and the first sampling component 2 and the second sampling component 3 are pulled outward through the handle 1.

Claims

1. A handheld coal sampling machine, characterized in that ,include: Grip piece; A first sampling assembly that can be assembled and spliced ​​with each other, the first sampling assembly can be fixedly mounted on one end of the handle by bolts, and the first sampling assembly can sample the coal on the upper side; A second sampling assembly that can be assembled and spliced ​​with each other, the second sampling assembly can be fixedly installed on the other end of the first sampling assembly by bolts, and the second sampling assembly can sample coal on both sides; A cleaning ring for cleaning coal slag outside the first sampling assembly, magnetically attracted to one end of the handle; The gripping member comprises an inserting cylinder which can be plugged and matched with one end of the first sampling assembly, a turning handle is fixedly mounted on the outside of the inserting cylinder, and a rotating plug post is rotatably connected inside the inserting cylinder, and a labor-saving torsion rod is slidably connected to one end of the rotating plug post; The first sampling assembly comprises an outer retaining tube, which can be plugged into and matched with the plug-in tube, and the inner sampling tube is rotatably matched inside the outer retaining tube, one end of the inner sampling tube is fixedly connected with a plug post, and the other end is fixedly connected with an insert tube, and the plug post and the rotating plug post can both be plugged into and matched with the insert tube, and directional arrows are fixedly installed at both ends of the inner sampling tube; The outer retaining tube is provided with a feed port on the outside, a plug-in arc plate is fixedly installed on one end of the outer retaining tube, and a plug-in groove is provided on the other end, the plug-in arc plate can be plugged into the plug-in groove, and the inner wall of the other end of the outer retaining tube is symmetrically structured and fixedly connected with two elastic plates, the other end of the elastic plate is rotatably connected with a rigid clamping sleeve, the end of the inserting tube is fixedly connected with a connecting ear, and the rigid clamping sleeve is plug-in-matched with the connecting ear; The second sampling component includes a docking ring that can be plugged and installed with the plug-in arc plate. One end of the docking ring is fixedly connected to a part barrel, and a docking shaft is rotatably connected inside the part barrel. The docking shaft can be plugged and matched with the plug column, and the external thread of the docking shaft is connected to two outwardly expanded sampling parts.

2. The handheld coal sampling machine according to claim 1 is characterized in that: The outward expansion sampling part includes a threaded sleeve that slides with the inner wall of the part barrel in a limited position, the threaded sleeve is threadedly connected and adapted to the external thread fixedly installed on the outside of the docking shaft, and the outside of the threaded sleeve is symmetrically structured with two support rods hingedly installed, and the other end of the support rod is hingedly installed with an expansion plate, a storage groove is opened on the outside of the part barrel, the expansion plate is rotatably installed in the storage groove, and the other end of the expansion plate is slidably connected with the sampling barrel, a push-pull rod is provided between the sampling barrel and the support rod, and the two ends of the push-pull rod are respectively rotatably connected to the sampling barrel and the support rod.

3. The handheld coal sampling machine according to claim 2 is characterized in that: One end of the storage groove is fixedly connected with an elastic sheet.

4. The handheld coal sampling machine according to claim 3 is characterized in that: The other end of the part barrel is detachably connected to a docking barrel, and the other end of the docking barrel is rotatably connected to a spiral drill bit. A battery is fixedly installed in an installation groove opened inside the docking barrel, and a control circuit element board electrically connected to one side of the battery is fixedly installed in the docking barrel. One side of the control circuit element board is electrically connected to a control motor, and the control motor is fixedly connected to the spiral drill bit.

5. The handheld coal sampling machine according to claim 4 is characterized in that: A charging connector is fixedly installed in the charging slot provided on the outside of the docking tube, the charging connector is electrically connected to the control circuit component board, and a rubber plug fixedly connected to the outside of the docking tube is plugged and installed in the charging slot.

6. The method for using a handheld coal sampling machine according to claim 5, characterized in that: The following steps are involved: S1. According to sampling requirements, a certain number of first sampling components and second sampling components are selected and assembled in sequence on one side of the handle; S2, installing the spiral drill bit at the end of the second sampling assembly through the docking sleeve; S3, transmitting a forward working signal to the control circuit component board through an external remote control device, thereby driving the spiral drill bit to rotate, keeping the feed port on the outside of the outer retaining tube facing upward, and inserting the spiral drill bit into the coal pile through the grip piece, and controlling the spiral drill bit to stop rotating after the first sampling assembly and the second sampling assembly are completely immersed in the coal pile; S4, rotating the labor-saving torsion bar, so that the rotating plug column drives the inner sampling tube and the outer expansion sampling piece to take samples; after the sampling is completed, the labor-saving torsion bar is rotated in the opposite direction until it is reset, and then the spiral drill bit is controlled to reverse, and the first sampling assembly and the second sampling assembly are pulled outward through the grip piece.

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