Geological sampling device for coal geological exploration

Abstract

The invention discloses a geological sampling device for coal geological exploration, and relates to the technical field of coal geological sampling, the geological sampling device comprises a base, the side surface of the base is provided with a notch, the upper surface of the base is fixedly connected with a cross slide rail, the surface of the cross slide rail is slidably connected with a sample storage box, and the geological sampling device also comprises a connecting rod, the side face of the connecting rod is fixedly connected with a supporting plate, and the interior of the supporting plate is fixedly connected with a drilling and backfilling assembly. The device has the advantages that through drilling and backfilling integrated exploration sampling, multi-section drill rod operation is reduced, the convenience of the device is improved, in-situ soil backfilling is achieved through reverse rotation of the backfilling spiral blade and the drill rod, backfilling materials are prevented from being additionally added, uniform backfilling is achieved, the backfilling compactness is remarkably improved, rod moving is not needed after drilling is completed, and the working efficiency is improved. The movable sampling pipe assembly is directly used and matched with the elastic blocking piece to prevent samples from falling off, the sampling resistance is reduced through the air holes, and the integrity and purity of the samples are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of coal geological sampling technology, and in particular to a geological sampling device for coal geological exploration. Background Technology

[0002] Coal geological exploration is a key prerequisite for determining the distribution, reserves, and mining conditions of coal resources. In the traditional process of coal core sampling, multiple drill rods need to be connected in sequence and extended into the ground to establish a channel. Ordinary drill bits are connected to the bottom of the drill rods. When coring is required, a combination of professional coring drill bits and coring tubes needs to be used to obtain complete coal core samples.

[0003] Chinese Patent Publication No. CN118669047B discloses a multifunctional coal mine geological drilling device, including a support plate with a connecting plate fixedly connected to its surface, and a flipping component. A stabilizing component is also provided on the surface of the connecting plate. This invention utilizes a drilling component to drill holes in coal geology. After drilling is completed, the stabilizing component fixes the support plate as the drilling component continues drilling, further improving stability during drilling exploration.

[0004] While the aforementioned device can ensure stability, it cannot backfill the sampling holes after sampling. If the holes formed by drilling are not backfilled in time, they may disrupt the stress balance of the strata. The holes left on the ground pose a serious safety threat to the workers in the mining area. Conventional backfilling methods mainly involve in-situ soil backfilling, supplemented by manual compaction or simple mechanical compaction. However, manual compaction is uneven in strength, and mechanical compaction is difficult to reach the depth of the holes, which can easily lead to the backfill soil being "solid on top and loose at the bottom". There are still gaps in the depth of the holes, and the original stress state of the strata cannot be restored. Subsidence may still occur later. Moreover, the backfilled soil is prone to sinking due to rainwater erosion and settlement, requiring secondary filling. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a geological sampling device for coal geological exploration, which solves the problems mentioned in the background art, such as the separation of processes, cumbersome operation, easy contamination of samples, and poor backfill quality of existing coal geological exploration sampling devices.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A geological sampling device for coal geological exploration includes a base, a slot on the side of the base, a cross slide rail fixedly connected to the upper surface of the base, a sample storage box slidably connected to the surface of the cross slide rail, and further includes: A connecting rod is fixedly connected to a support plate on its side. A drilling and backfilling assembly is fixedly connected inside the support plate. The drilling and backfilling assembly includes a housing, a drill rod, a sampling tube, a spiral rod, a backfilling spiral blade, a drilling motor, a drive gear, an electromagnetic clutch, a fixing ring, and a cleaning brush. The housing is a hollow cylindrical structure, and the inner top wall of the housing is provided with an installation cavity. The drilling and backfilling assembly is located inside the slot.

[0007] Furthermore, an electric telescopic rod is fixedly connected to the upper surface of the base, a fixing frame is fixedly connected to the top of the electric telescopic rod, an electric hydraulic cylinder is fixedly connected to the upper surface of the fixing frame, and the output end of the electric hydraulic cylinder is fixedly connected to the connecting rod.

[0008] Furthermore, the bottom of the housing is provided with a sealing cover, and the center of the sealing cover has a through hole. The drilling motor is located on the upper surface of the housing, and the output end of the drilling motor is fixedly connected to the drive gear. The bottom end of the drill rod is fixedly connected to a drill bit, which is conical in shape and has a spiral drilling edge on its surface. The drill rod is located inside the housing and is a hollow tubular structure. The top end of the drill rod is fixedly connected to a driven gear one. The sampling tube is slidably connected to the drill rod, and the surface of the sampling tube has several vent holes. An elastic baffle is rotatably connected to the inner bottom surface of the sampling tube. The top end of the sampling tube is fixedly connected to a driven gear two. The spiral rod is rotatably connected to the drill rod, and the top end of the spiral rod is fixedly connected to a driven gear three. The backfilling spiral blade is located at the bottom end of the spiral rod.

[0009] Furthermore, the driven gear one, driven gear two, and driven gear three are all rotatably connected to the inside of the mounting cavity via bearings, and are distributed along the axial direction of the driving gear and mesh with the driving gear.

[0010] Furthermore, three electromagnetic clutches are provided, and the three electromagnetic clutches are respectively located at the connection points between driven gear one, driven gear two, and driven gear three and the bearing.

[0011] Furthermore, the upper inner wall of the sample storage box is symmetrically provided with a sliding groove, and a telescopic plate is slidably connected inside the sliding groove. Sample tubes are placed inside the sample storage box, and a connecting plate is fixedly connected to the bottom surface of the sample storage box. A position sensor is fixedly connected to the upper surface of the connecting plate.

[0012] Furthermore, the cleaning brush is located on the inner wall of the fixing ring, the fixing ring is fixedly connected to the inner surface of the housing, the cleaning brush is in contact with the surface of the backfill spiral blade, and the cleaning brush is made of wear-resistant nylon material.

[0013] Furthermore, the base is equipped with casters, which are fitted with locking devices, and an electric telescopic rod is fixedly connected to the base.

[0014] Compared with existing technologies, the advantages of this invention are: 1. By integrating drilling and backfilling components for exploration and sampling, the need for multiple drill rods in the sampling process of traditional equipment is reduced, thus improving the ease of use of the equipment.

[0015] 2: The backfilling spiral blades and the drill rod rotate in opposite directions to backfill the soil accumulated in the borehole in situ, without the need to add additional backfill material. The electric hydraulic cylinder drives the drill rod to move slowly upward, so that the soil is filled evenly, which greatly improves the backfill density.

[0016] 3: After drilling is completed, there is no need to remove the drill rod. Samples can be taken directly through the internal sampling tube, avoiding soil falling off the borehole wall and contaminating the sample. The design of the elastic baffle of the sampling tube can prevent the sample from falling off, and the use of vent holes reduces sampling resistance, ensuring the integrity and purity of the sample.

[0017] In summary, this invention reduces multi-section drill rod operations and improves device convenience by integrating drilling and backfilling exploration and sampling. It also significantly improves backfill density by using backfilling spiral blades that rotate in the opposite direction to the drill rod to achieve in-situ backfilling of soil. Furthermore, it utilizes a movable sampling tube device to ensure sample integrity and purity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a geological sampling device for coal geological exploration proposed in this invention. Figure 2 This is a rear view of a geological sampling device for coal geological exploration proposed in this invention; Figure 3 This is a bottom view of a geological sampling device for coal geological exploration proposed in this invention; Figure 4 This is a schematic diagram of the base support structure of a geological sampling device for coal geological exploration proposed in this invention; Figure 5 This is an exploded view of the drilling and backfilling component of a geological sampling device for coal geological exploration proposed in this invention. Figure 6 This is a schematic diagram of the sample storage box structure of a geological sampling device for coal geological exploration proposed in this invention; Figure 7 This is a schematic diagram of the shell structure of a geological sampling device for coal geological exploration proposed in this invention; Figure 8This is a schematic diagram of the sampling tube of a geological sampling device for coal geological exploration proposed in this invention.

[0019] In the diagram: 1. Base; 2. Fixing frame; 3. Position sensor; 4. Sample storage box; 41. Slide groove; 42. Telescopic plate; 43. Sample tube; 5. Shell; 501. Through hole; 51. Drill rod; 510. Drill bit; 511. Driven gear one; 52. Sampling tube; 520. Vent hole; 521. Elastic baffle; 522. Driven gear two; 53. Backfilling spiral blade; 530. Driven gear three; 54. Drilling motor; 55. Driving gear; 56. Electromagnetic clutch; 57. Fixing ring; 58. Cleaning brush; 6. Electro-hydraulic cylinder; 7. Electric telescopic rod one; 8. Connecting rod; 9. Support plate; 10. Cross slide rail; 11. Electric telescopic rod two; 12. Moving wheel. Detailed Implementation

[0020] Reference Figures 1-8 A geological sampling device for coal geological exploration includes a base 1. The side of the base 1 has a slot for cooperating with the operation of the drilling and backfilling assembly, as well as with the sample storage box 4 and the sampling tube 52 to complete the sampling work. A cross slide rail 10 is fixedly connected to the upper surface of the base 1, so that the sample storage box 4 can store multiple samples after moving to different positions. The sample storage box 4 is slidably connected to the surface of the cross slide rail 10 for storing the sampled samples.

[0021] An electric telescopic rod 7 is fixedly connected to the upper surface of the base 1. A fixed frame 2 is fixedly connected to the top of the electric telescopic rod 7. An electric hydraulic cylinder 6 is fixedly connected to the upper surface of the fixed frame 2. The output end of the electric hydraulic cylinder 6 is fixedly connected to the connecting rod 8, so that the electric telescopic rod 7 and the electric hydraulic cylinder 6 are combined to drive and adjust the lifting height of the drilling and backfilling assembly, thereby enabling the device to complete the work of drilling, sampling, and adjusting the backfilling depth.

[0022] It also includes: a connecting rod 8, on the side of which a support plate 9 is fixedly connected to ensure the stability of the drilling and backfilling assembly during operation. The drilling and backfilling assembly is fixedly connected inside the support plate 9. The drilling and backfilling assembly includes a housing 5, a drill rod 51, a sampling tube 52, a spiral rod, a backfilling spiral blade 53, a drilling motor 54, a drive gear 55, an electromagnetic clutch 56, a fixing ring 57, and a cleaning brush 58. The drilling and backfilling assembly can complete the drilling, sampling, and backfilling process without disassembling multiple drill rods 51. The housing 5 is a hollow cylindrical structure. The inner top wall of the housing 5 is provided with an installation cavity for installing the drilling and backfilling assembly inside. The drilling and backfilling assembly is located inside the slot.

[0023] Three electromagnetic clutches 56 are provided, located at the connection points between driven gear 1 511, driven gear 2 522, and driven gear 3 530 and the bearings, respectively. The on / off state of the electromagnetic clutches 56 is controlled by a control system provided on the base 1. This control system is an existing structure and is not shown in the figure. It realizes the switching of power transmission between the driving gear 55 and different driven gears, thereby realizing the drilling of the drill rod 51, sampling of the sampling tube 52, and timely backfilling of the drill hole by the backfilling spiral blade 53.

[0024] The bottom of the housing 5 is provided with a sealing cover, and the center of the sealing cover is provided with a through hole 501. The drilling motor 54 is located on the upper surface of the housing 5. The output end of the drilling motor 54 is fixedly connected to the drive gear 55. The bottom end of the drill rod 51 is fixedly connected to the drill bit 510. The drill bit 510 is conical in shape and has a spiral drilling edge on its surface. The drill rod 51 is located inside the housing 5. The drill rod 51 is a hollow tubular structure. The top end of the drill rod 51 is fixedly connected to the driven gear 1 511. The sampling tube 52 is slidably connected to the drill rod 51. The surface of the sampling tube 52 is provided with several vent holes 520. The inner bottom surface of the sampling tube 52 is rotatably connected to an elastic baffle 521. The top end of the sampling tube 52 is fixedly connected to the driven gear 2 522. The spiral rod is rotatably connected to the drill rod 51. The top end of the spiral rod is fixedly connected to the driven gear 3 530. The backfilling spiral blade 53 is located at the bottom end of the spiral rod. Driven gear 1 511, driven gear 2 522, and driven gear 3 530 are all rotatably connected to the inside of the mounting cavity via bearings, and are distributed along the axial direction of the driving gear 55 and mesh with the driving gear 55. Specifically, during operation, the drilling and backfilling assembly utilizes a drilling motor 54 to drive the drive gear 55 to rotate, which in turn drives the tapered drill bit 510 connected to the drill rod 51 to rotate, thus achieving drilling operations. During sampling, the sampling opening of the tapered drill bit 510 opens, and then the on / off state of the corresponding electromagnetic clutch 56 is switched. The electromagnetic clutch 56 adopts the QianDai CDE005AA series, and the armature is engaged and disengaged by controlling the on / off state of the electromagnetic coil, thereby switching the power transmission between the drive gear 55 and different driven gears. This causes the drive gear 55 to mesh with the driven gear 522, and the drilling motor 54 drives the sampling tube 52 to rotate and move downwards, so that the sampling opening at the bottom of the sampling tube 52 cuts into the target stratum soil. The soil enters the sampling tube 52 under the action of rotational cutting force. After sampling is completed, the electric telescopic rod 7 and the electric hydraulic cylinder 6 work together to drive the... When the sampling tube 52 moves upward, the elastic baffle 521 prevents the sample from falling out. During backfilling, after the sampling tube 52 takes out the sample, the drill rod 51 remains in the borehole. The electromagnetic clutch 56 is switched so that the driving gear 55 meshes with the driven gear 530. The drilling motor 54 drives the drill rod 51 to rotate in the opposite direction. The spiral rod drives the backfilling spiral blade 53 to rotate in the opposite direction with the drill rod 51, which transports the soil accumulated around the borehole opening during the drilling process upward and pushes it into the borehole. At the same time, the sealing cover at the bottom of the housing 5 fits with the borehole opening to prevent the soil from scattering and realizes the in-situ backfilling of the borehole soil. During the backfilling process, the drill rod 51 is slowly moved upward by the coordinated drive of the electric telescopic rod 7 and the electric hydraulic cylinder 6. With the push of the backfilling spiral blade 53, the soil is evenly filled into the borehole, improving the backfill density. Several vent holes 520 are provided on the side wall of the sampling tube 52 to reduce the air pressure resistance inside the tube during sampling.

[0025] The upper inner wall of the sample storage box 4 is symmetrically provided with a sliding groove 41. A telescopic plate 42 is slidably connected inside the sliding groove 41. A sample tube 43 is placed inside the sample storage box 4. A connecting plate is fixedly connected to the bottom surface of the sample storage box 4. A position sensor 3 is fixedly connected to the upper surface of the connecting plate. Specifically, after sampling is completed, while the drilling and backfilling assembly moves upward, the sample storage box 4 moves to directly below the drilling and backfilling assembly via the cross slide rail 10. The telescopic plate 42 is opened in conjunction with the position sensor 3, and the drilling motor 54 reverses, driving the sampling tube 52 to rotate in the opposite direction, pushing the sample inside into the sample test tube 43. Finally, the telescopic plate 42 is pulled up to close the sample storage box 4, allowing the sample storage box 4 to move to different positions along the cross slide rail 10, realizing the classified storage of multiple sets of samples.

[0026] The cleaning brush 58 is located on the inner wall of the fixing ring 57. The fixing ring 57 is fixedly connected to the inner surface of the housing 5. The cleaning brush 58 is in contact with the surface of the backfilling spiral blade 53. The cleaning brush 58 is made of wear-resistant nylon material. The bottom surface of the base 1 is equipped with a movable wheel 12, the movable wheel 12 is equipped with a locking device, and the bottom surface of the base 1 is fixedly connected with an electric telescopic rod 11. Specifically, after drilling and backfilling are completed, the drilling motor 54 continues to rotate, and the cleaning brush 58 cleans the backfilling auger blade 53 and the soil remaining at the borehole opening. Then, the electric telescopic rod 7 moves the connecting rod 8 and the support plate 9 to the highest position to ensure that the drilling and backfilling assembly is stored in the slot of the base 1. Then, the electric telescopic rod 11 retracts the base 1, releases the locking device of the moving wheel 12, and pushes the device to the next exploration point, repeating the above operation process.

[0027] In this invention, as the sample storage is completed, the electric hydraulic cylinder 6 and the electric telescopic rod 7 work together to slowly reverse, driving the drill rod 51 to gradually move upward. The backfilling auger 53 continuously pushes the soil into the borehole, achieving uniform backfilling. When the top of the drill rod 51 rises to be level with the ground, the drill rod 51 is kept rotating in the opposite direction to ensure compaction and avoid insufficient backfilling or excessive compression. The drilling motor 54 adopts the Siemens 1LE0001-1DA23-3AA4 series, which converts electrical energy into mechanical energy. The gear transmission drives the drill rod 51 and the sampling tube 52 to rotate. The electric hydraulic cylinder 6 and the electric telescopic rod 7 are Parker HMI250-1000 and Festo ESBF-C-63-100-5P series respectively. Both are driven by motors to rotate the lead screw, converting the rotational motion into the linear reciprocating motion of the piston rod, outputting a large thrust to realize the lifting or pushing of heavy-duty components. The position sensor 3 is SICK IM18-08NNS-ZW1 series, which collects component position signals in real time through the principle of electromagnetic induction.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A geological sampling device for coal geological exploration, comprising a base (1), characterized in that: The base (1) has a slot on its side, and a cross slide rail (10) is fixedly connected to the upper surface of the base (1). A sample storage box (4) is slidably connected to the surface of the cross slide rail (10). The base also includes: A connecting rod (8) is fixedly connected to a support plate (9) on its side. A drilling and backfilling assembly is fixedly connected inside the support plate (9). The drilling and backfilling assembly includes a housing (5), a drill rod (51), a sampling tube (52), a spiral rod, a backfilling spiral blade (53), a drilling motor (54), a drive gear (55), an electromagnetic clutch (56), a fixing ring (57), and a cleaning brush (58). The housing (5) is a hollow cylindrical structure. The inner top wall of the housing (5) is provided with an installation cavity. The drilling and backfilling assembly is located inside the slot.

2. The geological sampling device for coal geological exploration according to claim 1, characterized in that, An electric telescopic rod (7) is fixedly connected to the upper surface of the base (1), and a fixed frame (2) is fixedly connected to the top of the electric telescopic rod (7). An electric hydraulic cylinder (6) is fixedly connected to the upper surface of the fixed frame (2), and the output end of the electric hydraulic cylinder (6) is fixedly connected to the connecting rod (8).

3. The geological sampling device for coal geological exploration according to claim 1, characterized in that, The bottom of the housing (5) is provided with a sealing cover, and a through hole (501) is opened in the center of the sealing cover. The drilling motor (54) is located on the upper surface of the housing (5). The output end of the drilling motor (54) is fixedly connected to the drive gear (55). The bottom end of the drill rod (51) is fixedly connected with a drill bit (510). The drill bit (510) is conical in shape and has a spiral drilling edge on its surface. The drill rod (51) is located inside the housing (5). The drill rod (51) is a hollow tubular structure. The top end of the sampling tube (51) is fixedly connected to a driven gear (511). The sampling tube (52) is slidably connected to the drill rod (51). The surface of the sampling tube (52) is provided with several vent holes (520). The inner bottom surface of the sampling tube (52) is rotatably connected to an elastic baffle (521). The top end of the sampling tube (52) is fixedly connected to a driven gear (522). The spiral rod is rotatably connected to the drill rod (51). The top end of the spiral rod is fixedly connected to a driven gear (530). The backfilling spiral blade (53) is located at the bottom end of the spiral rod.

4. A geological sampling device for coal geological exploration according to claim 3, characterized in that, The driven gear one (511), driven gear two (522), and driven gear three (530) are all rotatably connected to the inside of the mounting cavity through bearing rotation, and are distributed along the axial direction of the driving gear (55) and mesh with the driving gear (55).

5. A geological sampling device for coal geological exploration according to claim 1, characterized in that, The electromagnetic clutches (56) are provided in three parts, and the three electromagnetic clutches (56) are respectively located at the connection between the driven gear one (511), the driven gear two (522), the driven gear three (530) and the bearing.

6. A geological sampling device for coal geological exploration according to claim 1, characterized in that, The upper inner wall of the sample storage box (4) is symmetrically provided with a sliding groove (41), and a telescopic plate (42) is slidably connected inside the sliding groove (41). A sample tube (43) is placed inside the sample storage box (4). A connecting plate is fixedly connected to the bottom surface of the sample storage box (4), and a position sensor (3) is fixedly connected to the upper surface of the connecting plate.

7. A geological sampling device for coal geological exploration according to claim 1, characterized in that, The cleaning brush (58) is located on the inner wall of the fixing ring (57), the fixing ring (57) is fixedly connected to the inner surface of the housing (5), the cleaning brush (58) is in contact with the surface of the backfilling spiral blade (53), and the cleaning brush (58) is made of wear-resistant nylon material.

8. A geological sampling device for coal geological exploration according to claim 1, characterized in that, The base (1) is equipped with a movable wheel (12) on its bottom surface. The movable wheel (12) is equipped with a locking device. An electric telescopic rod (11) is fixedly connected to the bottom surface of the base (1).

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