A drilling sampling device for coal seam fire area geological exploration

Abstract

The application relates to a drilling sampling device for coal seam fire area geological exploration, and relates to the technical field of high-temperature loose coal seam fire area geological exploration. The device comprises a base plate, a plurality of moving wheels fixed to the bottom surface of the base plate, a support arm arranged above the base plate in the vertical direction, a vertical downward fixed plate fixed to the side edge of the bottom surface of the support arm, a drilling assembly arranged on the vertical side surface of the support arm close to the fixed plate, and the bottom edge of the support arm away from the fixed plate is rotationally connected with the top surface of the base plate. The support arm can be turned to an application state vertically upward, a transportation state horizontally abutting against the top surface of the base plate, and a locking piece is arranged outside the base plate. In the application, the locking piece fixes the support arm during operation, cooperates with the guideable positioning limiting sleeve, realizes the drilling pipe centralizing, the orifice plugging in the high-temperature loose stratum, prevents the hole collapse and the sundries from falling into, and guarantees the complete sampling in the high-temperature loose stratum.

Description

Technical Field

[0001] This application relates to the technical field of geological exploration of high-temperature loose coal seam fire zones, and in particular to a drilling and sampling device for geological exploration of coal seam fire zones. Background Technology

[0002] In geological exploration of coal seam fire areas, drilling and sampling is a core component. The performance of the drilling and sampling equipment directly affects the accuracy of exploration data, exploration efficiency, and operational safety. Coal seam fire areas are characterized by complex geological conditions, generally featuring high temperatures, loose strata, rugged terrain, and limited working space. Drilling operations are susceptible to high-temperature disturbances and the collapse of loose strata, placing high demands on the portability, stability, ease of transport, and adaptability to high-temperature and loose strata of the drilling and sampling equipment. Currently, the industry has developed various drilling and sampling devices suitable for geological exploration of coal seam fire areas. Their core function is to penetrate deep into the high-temperature, loose strata of the coal seam fire area using drilling components to obtain complete geological samples, providing reliable data support for fire area delineation, fire intensity assessment, and the development of control plans.

[0003] In related technologies, a portable drilling and sampling device for use in high-temperature / loose strata is disclosed. This device mainly consists of four parts: a base plate, a moving mechanism, a support structure, and a drilling assembly. The base plate serves as the overall load-bearing foundation, with four casters fixedly mounted on its bottom surface for easy movement of the entire device. A support arm is fixedly mounted vertically along the top edge of the base plate, serving as the mounting carrier for the drilling assembly. The drilling assembly includes a support plate slidably connected to the vertical outer side of the support arm. A drive source, employing a motor-screw structure, is fixedly mounted on the top surface of the support arm, enabling the support plate to move up and down along the support arm. A drilling pipe is rotatably mounted on the bottom surface of the support plate in the vertical direction, and a power motor is fixedly mounted on its top surface as the power source to drive the drilling pipe to rotate around its own axis, thus achieving drilling and sampling operations.

[0004] However, when transporting the device to drilling sites in high-temperature, loose strata of coal seam fire areas, specialized packaging is required to prevent damage to components from bumps and vibrations during transport. However, the vertically fixed installation of the support arm results in a significant increase in the overall height of the device, leading to a substantial increase in packaging volume. This not only occupies more transport space and reduces transport efficiency but also increases the amount of packaging materials used and the complexity of the packaging process, significantly raising packaging and transport costs. This makes it difficult to meet the efficient and low-cost transportation needs of high-temperature, loose strata exploration sites in coal seam fire areas, indicating room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide a drilling and sampling device for geological exploration of coal seam fire areas, focusing on high-temperature and loose strata sampling scenarios, and solving the problems of large packaging volume and high transportation and packaging costs caused by the vertical fixation of the support arm in the above-mentioned related technologies.

[0006] The drilling and sampling device for geological exploration of coal seam fire zones provided in this application adopts the following technical solution: A drilling and sampling device for geological exploration of coal seam fire areas includes a base plate and several movable wheels fixed to the bottom surface of the base plate. A support arm is provided vertically above the base plate, and a vertically downward fixing plate is fixed to one side edge of the bottom surface of the support arm. A drilling component is provided on the vertical side of the support arm near the fixing plate, and the bottom edge of the support arm away from the fixing plate is rotatably connected to the top surface of the base plate. The support arm can be rotated to an application state with the vertical direction upward and to a transport state with the horizontal direction abutting against the top surface of the base plate. A locking member is provided on the outside of the base plate. When the support arm is in the application state, the vertical inner side of the fixing plate abuts against the vertical side of the base plate, and the locking member is used to detachably fix the fixing plate to the vertical side of the base plate at this time.

[0007] By adopting the above technical solution, the support arm is rotatably connected to the base plate and can switch between application and transportation states. With the help of locking components, it is fixed in place. The core advantage is that it solves the transportation pain point caused by the vertical fixing of the support arm in related technologies. During transportation, the support arm is rotated to a horizontal position against the base plate, significantly reducing the overall vertical height of the device and the packaging volume, reducing transportation space occupation, improving transportation efficiency, and simultaneously reducing the amount of packaging materials used and the complexity of packaging processes, effectively controlling packaging and transportation costs. In high-temperature, loose strata sampling scenarios, the support arm is fixed with locking components to ensure structural stability during drilling operations, adapting to the efficient and low-cost transportation and operation needs of coal seam fire area exploration sites.

[0008] Optionally, when the support arm is in use, a limiting frame that can slide up and down and be fixed is provided on the side away from the substrate. At this time, a limiting sleeve located directly below the drilling assembly is fixed on the bottom surface of the limiting frame along the horizontal direction. A limiting retaining ring is fixed at the outer edge of the top surface of the limiting sleeve. The drilling assembly can pass through the limiting sleeve to perform preliminary drilling. After the drilling assembly performs preliminary drilling, the limiting sleeve can be inserted into the drilled hole and fixed after the limiting frame moves down. At this time, the bottom surface of the limiting retaining ring abuts against the outer edge of the top surface of the drilled hole.

[0009] By adopting the above technical solution, during the drilling process of the drilling pipe in high-temperature and loose strata, the limiting sleeve can play a radial guiding and straightening role for the drilling pipe, and improve the verticality of the borehole. After the borehole is formed, the limiting sleeve is inserted into the hole and the limiting retaining ring is pressed against the soil around the borehole opening. This can effectively prevent the soil fragments and debris that are prone to occur at the borehole opening in high-temperature and loose strata from falling into the borehole, avoiding contamination of the rock core or blockage of the sampling channel, thereby improving the integrity and sampling quality of geological samples in high-temperature and loose strata.

[0010] Optionally, the locking component is a locking bolt, a fixing through hole is provided on the fixing plate, and a fixing screw hole is provided on the vertical side of the base plate; when the support arm is in the application state, the fixing through hole coincides with the fixing screw hole, and the locking bolt passes through the fixing through hole and is screwed into the fixing screw hole.

[0011] By adopting the above technical solution, when the support arm is in use, the fixing through hole and the fixing screw hole coincide. The fixing plate and the base plate can be detachably fixed by screwing in the locking bolt. No complicated operation is required, which makes it easy for the staff to quickly lock and unlock the support arm. The bolt connection can effectively withstand the vibration generated during drilling operations, prevent the support arm from shifting, and ensure the stability of drilling and sampling. At the same time, the detachable design also facilitates the maintenance and repair of the device.

[0012] Optionally, two symmetrical positioning rods are fixedly mounted on the top surface of the substrate along the vertical direction on opposite sides of the support arm. A connecting rod is rotatably mounted on the top surface of the positioning rod, and a limiting component is provided on the bottom surface of the connecting rod. The rotating surface of the connecting rod is parallel to the top surface of the substrate. A support rod is rotatably mounted on the end face of the connecting rod away from the positioning rod. The rotating surface of the support rod is parallel to the side of the positioning rod. An adjusting component is provided on the outer periphery of the support rod. When the support arm is in the application state, the two connecting rods rotate in the direction away from the support arm to an unfolded state that is parallel to each other and perpendicular to the fixed plate and locked by the limiting component. At this time, the two support rods rotate to a support state that is vertically downward and with their lower end faces abutting the ground. When the support arm is in the transportation state, the two connecting rods rotate in the direction away from the support arm to a storage state that is parallel to each other and parallel to the support arm and locked by the limiting component. At this time, the two support rods rotate towards each other to a traction state that is coaxial and with their end faces abutting and fixed by the adjusting component. At this time, the bottom surface of the support rod abuts the top surface of the drilling assembly on the support arm.

[0013] By adopting the above technical solution, the connecting rod unfolds and the support rod provides vertical support during application, which can balance the center of gravity of the device, reduce vibration during drilling operations, prevent the device from tipping over, and adapt to the rugged terrain of coal seam fire areas. During transportation, the connecting rod is retracted and the support rod is in a traction state and fixed, which not only provides limit protection for the support arm in the transportation state, but also reduces the overall space occupied. At the same time, the traction structure makes it easy for workers to cooperate with the moving wheels to push the device, improving the convenience of transportation.

[0014] Optionally, the adjusting component includes a middle rod vertically fixed to the outer periphery of the support rod; the middle rod is located on the top surface of the support rod when the support rod is in a traction state, and elastic adjusting rods with elastic elongation properties are vertically fixed on the upper end surfaces of the two middle rods in a direction of mutual approach; an adjusting block and an adjusting slot are fixed on the end surface of the elastic adjusting rod away from the middle rod, and the adjusting block on one of the two elastic adjusting rods is inserted into the adjusting slot on the other when the support rod is in a traction state; the elastic adjusting rod is vertically downward when the support rod is in a supported state, and the bottom surface of the adjusting block is in contact with the ground.

[0015] By adopting the above technical solution, during transportation, the two elastic adjusting rods cooperate with the adjusting blocks and adjusting slots to form a grip handle, which makes it easy for workers to pull the device and improves the convenience of transportation. When in use, the elastic adjusting rods are vertically downward and the adjusting blocks are in contact with the ground. With the help of their elastic elongation properties, they can adapt to uneven ground, further balance the center of gravity of the device, and reduce vibration. At the same time, the elastic structure can play a buffering role, reduce the impact of ground protrusions on the device, and improve the stability of operation.

[0016] Optionally, a guide slope is provided on the outer edge of the side of the adjusting block away from the elastic adjusting rod.

[0017] By adopting the above technical solution, when the support rod is switched to the traction state, the guide slope can guide the adjustment block to be smoothly inserted into the adjustment slot, avoiding operation jamming caused by alignment deviation, eliminating the need for staff to repeatedly adjust the position, and saving operation time.

[0018] Optionally, the limiting member includes an elastic limiting rod with one end rotatably connected to the bottom surface of the connecting rod and having elastic elongation properties. A first slot is provided on the vertical side of the support arm facing the positioning rod, and a second slot is provided on the top surface of the substrate. When the two connecting rods are in the extended state, the elastic limiting rod can rotate to a horizontal state along the direction close to the support arm and insert into the first slot. When the two connecting rods are in the retracted state, it can rotate to a vertically downward state and insert into the second slot.

[0019] By adopting the above technical solution, when the connecting rod is unfolded, the elastic limiting rod is horizontally inserted into the first slot, which can not only lock the position of the connecting rod, but also further reinforce the support arm and improve the stability of operation; when the connecting rod is stored, the elastic limiting rod is vertically inserted into the second slot, which can firmly fix the connecting rod and prevent the connecting rod from shaking and colliding with the parts during transportation.

[0020] Optionally, a guide slope is provided at the outer edge of the end face of the elastic limiting rod away from the connecting rod.

[0021] By adopting the above technical solution, whether the connecting rod is inserted into the first slot when it is unfolded or into the second slot when it is folded up, the guide slope can play a guiding role, avoiding the end of the limiting rod from getting stuck with the edge of the corresponding slot. The limiting operation can be completed quickly without the need for precise alignment by the staff.

[0022] Optionally, an elastic locking member is provided on the outer periphery of the end of the elastic limiting rod away from the connecting rod, and positioning grooves for the elastic locking member to be engaged are provided on the side walls of the first slot and the second slot.

[0023] By adopting the above technical solution, after the elastic limiting rod is inserted into the corresponding slot, the elastic snap-fit ​​part snaps into the positioning groove, forming a double limit, which effectively avoids the limiting rod from loosening or falling off due to drilling operation vibration or transportation bumps, and ensures the stability of the connecting rod and support arm; at the same time, the snap-fit ​​structure does not affect the normal insertion and removal of the limiting rod, making operation convenient, which not only ensures the safety of operation and transportation, but also improves the structural reliability of the device.

[0024] Optionally, the elastic snap-fit ​​component includes a compression spring and an arc-shaped protrusion. The elastic limiting rod has a placement groove for the compression spring and the arc-shaped protrusion to be inserted. The compression spring squeezes one side of the arc-shaped protrusion, causing a part of the arc-shaped protrusion to protrude from the opening of the placement groove. The outer surface of the protruding part of the arc-shaped protrusion is an arc surface, and the arc length corresponding to this arc surface is a minor arc.

[0025] By adopting the above technical solution, the compression spring provides continuous elastic force, ensuring that the arc-shaped protrusion always fits in the positioning groove, ensuring a firm engagement and effectively preventing the limit rod from loosening; the arc surface design of the arc protrusion has a slight arc structure, which can not only ensure engagement stability, but also smoothly disengage from or engage with the positioning groove through the arc surface guide when inserting or removing the limit rod, reducing insertion and removal resistance and component wear.

[0026] In summary, this application includes the following beneficial technical effects: In this application, the support arm is rotated to a horizontal position to abut the base plate during transportation, which significantly reduces the overall vertical height of the device and the packaging volume, reduces the space occupied during transportation, improves transportation efficiency, and at the same time reduces the amount of packaging materials used and the complexity of the packaging process, effectively controlling packaging and transportation costs. When applied in high-temperature and loose strata sampling scenarios, the support arm is fixed by locking components to ensure the structural stability during drilling operations in high-temperature and loose strata, adapting to the efficient and low-cost transportation and operation needs of coal seam fire zone high-temperature and loose strata exploration sites. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application; Figure 2 This is a schematic diagram of the structure of the support arm in the transportation state as shown in Embodiment 1 of this application; Figure 3 This is a partial cross-sectional view of the drilling assembly installation and assembly in Embodiment 1 of this application; Figure 4 This is a partial structural diagram illustrating the installation and mating of the positioning components in Embodiment 1 of this application; Figure 5 This is a schematic diagram illustrating the installation and fit of the limiting component in Embodiment 1 of this application; Figure 6 This is a partial cross-sectional view of Embodiment 1 of this application illustrating the installation and fit of the limiting component; Figure 7 yes Figure 6 An enlarged schematic diagram of part A in the middle; Figure 8 This is a partial cross-sectional view of Embodiment 1 of this application illustrating the installation and fit of the adjusting component; Figure 9 yes Figure 8 Enlarged schematic diagram of part B in the middle; Figure 10 This is a partial structural diagram illustrating the installation and cooperation of the intermediate rod and the support rod in Embodiment 1 of this application; Figure 11 This is a partial structural diagram illustrating the installation and engagement of the limiting component in Embodiment 2 of this application.

[0028] In the diagram, 1. Base plate; 11. Moving wheel; 12. Second slot; 121. Positioning groove; 2. Locking component; 21. Locking bolt; 3. Support arm; 31. Fixing plate; 32. First slot; 4. Drilling assembly; 41. Support plate; 42. Drive source; 43. Drill pipe; 44. Power source; 5. Positioning assembly; 51. Positioning rod; 52. Connecting rod; 53. Support rod; 531. Elastic pad; 6. Adjusting component; 61. Intermediate rod; 62. Elastic adjusting rod; 621. Adjusting plug; 6211. Guide slope; 622. Adjusting slot; 7. Limiting component; 71. Elastic limiting rod; 711. Guide slope; 712. Placement groove; 72. Elastic snap-fit ​​component; 721. Compression spring; 722. Arc-shaped protrusion; 8. Limiting assembly; 81. Limiting frame; 82. Limiting sleeve; 83. Limiting retaining ring. Detailed Implementation

[0029] The present application will be further described in detail below with reference to all the accompanying drawings. Example

[0030] Reference Figure 1 and Figure 2 A drilling and sampling device for geological exploration of coal seam fire areas includes a base plate 1 and four movable wheels 11 fixed on the bottom surface of the base plate 1. A locking member 2 is provided on the outside of the base plate 1. A support arm 3 is provided on the upper part of the base plate 1 along the vertical direction. A vertically downward fixing plate 31 is fixed on one side edge of the bottom surface of the support arm 3. A drilling component 4 is provided on the vertical side of the support arm 3 near the fixing plate 31. The bottom edge of the support arm 3 away from the fixing plate 31 is rotatably connected to the top surface of the base plate 1. The support arm 3 can be rotated to a vertically upward application state and to a horizontal transport state that abuts against the top surface of the substrate 1. When the device is transported, the support arm 3 is adjusted to the transport state to reduce the transport volume of the device and reduce packaging and transportation costs. When the device is in operation, the support arm 3 is adjusted to the application state, and the vertical inner side of the fixing plate 31 abuts against the vertical side of the substrate 1. The locking member 2 is used to detachably fix the fixing plate 31 to the vertical side of the substrate 1 at this time.

[0031] Reference Figure 3 The locking component 2 is a locking bolt 21, and the locking bolt 21 is a wing bolt. The fixing plate 31 has a fixing through hole, and the base plate 1 has a fixing screw hole on its vertical side. When the support arm 3 is in the application state, the fixing through hole and the fixing screw hole coincide. At this time, the operator can manually rotate the locking bolt 21 so that it passes through the fixing through hole and is screwed into the fixing screw hole, thereby achieving the limiting and locking of the support arm 3 in this state.

[0032] Reference Figure 3 The drilling assembly 4 includes a support plate 41 slidably mounted on the vertical outer side of the support arm 3 in the application state, and a drive source 42 fixed on the top surface of the support arm 3 in the application state and driving the support plate 41 to move up and down. A drilling pipe 43 is rotatably mounted on the bottom surface of the support plate 41 in the vertical direction, and a power source 44 is fixed on the top surface to drive the drilling pipe 43 to rotate around its own axis. The drive source 42 is a motor screw structure, and the power source 44 is a power motor. The drilling pipe 43 is driven to move up and down by the drive source 42, and the drilling pipe 43 is driven to rotate by the power motor.

[0033] Reference Figure 4 and Figure 5 A positioning assembly 5 is provided on the top surface of the substrate 1. The positioning assembly 5 includes two positioning rods 51 that are fixed vertically on the top surface of the substrate 1 and symmetrically arranged on opposite sides of the support arm 3. A connecting rod 52 is rotatably mounted on the top surface of the positioning rod 51. A limit member 7 is provided on the bottom surface of the connecting rod 52. The rotating surface of the connecting rod 52 is parallel to the top surface of the substrate 1. A support rod 53 is rotatably mounted on the end face of the connecting rod 52 away from the positioning rod 51. The rotating surface of the support rod 53 is parallel to the side of the positioning rod 51. An adjustment member 6 is provided on the outer periphery of the support rod 53. An elastic pad 531 made of rubber is fixed on the end face away from the connecting rod 52. In high-temperature, loose strata sampling scenarios and when the support arm 3 is in use, the two connecting rods 52 rotate in a direction away from the support arm 3 to an unfolded state that is parallel to each other and perpendicular to the fixed plate 31 and locked by the limiting member 7. At this time, the two support rods 53 rotate to a support state that is vertically downward and the elastic pad 531 on the lower end surface is in contact with the ground. In this way, the support rods 53 are used to balance the center of gravity of the device in the application state and improve the stability of the device in the application. When the support arm 3 is in the transport state, the two connecting rods 52 rotate in a direction away from the support arm 3 to a storage state that is parallel to each other and parallel to the support arm 3 and are locked by the limiting member 7. At this time, the two support rods 53 rotate towards each other to a traction state that is coaxial and their end faces abut against each other and are fixed by the adjusting member 6. At this time, the bottom surface of the support rod 53 abuts against the top surface of the drive source 42 on the support arm 3. At this time, the support rod 53 is used to limit and fix the support arm 3 in the transport state.

[0034] Reference Figure 4 and Figure 5 The limiting member 7 includes an elastic limiting rod 71 with one end rotatably connected to the bottom surface of the connecting rod 52 and having elastic elongation properties. The support arm 3 has a first slot 32 on its vertical side facing the positioning rod 51, and a second slot 12 is provided on the top surface of the substrate 1. When the two connecting rods 52 are in the extended state, the elastic limiting rod 71 can rotate to a horizontal state along the direction close to the support arm 3 and elastically insert into the first slot 32, thereby limiting and locking the state of the two connecting rods 52 at this time, and further locking and limiting the state of the support arm 3 at this time; when the two connecting rods 52 are in the retracted state, the elastic limiting rod 71 can rotate to a vertical downward state and elastically insert into the second slot 12, thereby limiting and locking the state of the two connecting rods 52 at this time.

[0035] Reference Figure 6 and Figure 7 A guide slope 711 is provided at the outer edge of the end face of the elastic limiting rod 71 away from the connecting rod 52, and an elastic snap-fit ​​member 72 is provided on the outer periphery of the end of the elastic limiting rod 71 away from the connecting rod 52. Positioning grooves 121 are provided on the side walls of the first slot 32 and the second slot 12. When the elastic limiting rod 71 is inserted into the corresponding first slot 32 and the second slot 12, the elastic snap-fit ​​member 72 snaps into the corresponding positioning groove 121, thereby improving the installation stability. The elastic snap-fit ​​component 72 includes a compression spring 721 and an arc-shaped protrusion 722. The elastic limiting rod 71 has a placement groove 712 for the compression spring 721 and the arc-shaped protrusion 722 to be inserted. The compression spring 721 squeezes one side of the arc-shaped protrusion 722, causing a part of the arc-shaped protrusion 722 to protrude from the opening of the placement groove 712. The outer surface of the protruding part of the arc-shaped protrusion 722 is an arc surface, and the arc length corresponding to this arc surface is a minor arc.

[0036] Reference Figure 8 , Figure 9 and Figure 10 The adjusting member 6 includes an intermediate rod 61 vertically fixed to the outer periphery of the support rod 53; when the support rod 53 is in a traction state, the intermediate rod 61 is located on the top surface of the support rod 53, and at this time, the upper end surfaces of the two intermediate rods 61 are vertically fixed with elastic adjusting rods 62 having elastic elongation properties along the direction of mutual approach; an adjusting plug 621 and an adjusting slot 622 are fixed on the end surface of the elastic adjusting rod 62 away from the intermediate rod 61, and a guide slope 6211 is provided on the outer edge of the side of the adjusting plug 621 away from the elastic adjusting rod 62; When the device is being transported, the support rod 53 is adjusted to the traction state, and the adjustment block 621 on one of the two elastic adjustment rods 62 is inserted into the adjustment slot 622 on the other. At this time, the two intermediate rods 61 and the two elastic adjustment rods 62 together form a "handle" that facilitates traction, so as to drive the device to move better in this state. When the device is used for sampling in high-temperature / loose strata, the support rod 53 is adjusted to a supported state, and the elastic adjustment rod 62 is in a vertically downward state. At this time, the bottom surface of the adjustment block 621 uses the elastic force of the elastic adjustment rod 62 to elastically abut against the ground, further improving the stability of the device when it is used for sampling in high-temperature / loose strata.

[0037] The implementation principle of this application embodiment is as follows: During transportation, the support arm 3 is rotated to a horizontal position and abuts against the top surface of the substrate 1. At this time, the two connecting rods 52 rotate to a retracted state parallel to the support arm 3. The elastic limiting rod 71 is inserted vertically downward into the second slot 12 on the substrate 1, and the elastic snap-fit ​​72 is snapped into the positioning groove 121 to complete the locking. The two support rods 53 rotate towards each other to a coaxial abutting traction state. The adjusting plugs 621 on the two elastic adjusting rods 62 cooperate with the adjusting slots 622 to form a grip handle. The staff can use the handle to push the device with the moving wheels 11 to reduce the transportation volume and reduce transportation and packaging costs.

[0038] In application, first rotate the two connecting rods 52 to the unfolded state perpendicular to the fixing plate 31, then rotate the support arm 3 to face vertically upwards, so that the fixing plate 31 abuts against the vertical side of the base plate 1. Rotate the butterfly locking bolt 21 through the through hole of the fixing plate 31 and screw it into the screw hole of the base plate 1 to complete the initial locking of the support arm 3. Then, insert the elastic limiting rod 71 horizontally into the first slot 32 on the support arm 3 and position it through the elastic snap-fit ​​72 to lock the connecting rod 52 and the support arm 3. Then rotate the two support rods 53 to face vertically downwards, so that the elastic pad 531 abuts against the ground, and the elastic adjusting rod 62 faces vertically downwards and makes elastic contact with the ground by elastic force, so as to balance the center of gravity of the device and improve the stability during drilling and sampling. Example

[0039] Reference Figure 11 The difference between this embodiment and Embodiment 1 is that a limiting component 8 is provided on the outside of the support arm 3. The limiting component 8 includes a limiting frame 81 disposed on the side of the support arm 3 away from the base plate 1 in the application state and adjustable up and down and fixed by bolts, and a limiting sleeve 82 fixed on the bottom surface of the limiting frame 81 and located directly below the drill pipe 43. A limiting retaining ring 83 is integrally formed at the outer edge of the top surface of the limiting sleeve 82. The limiting frame 81 is slidably connected to the support arm 3 through a combination structure of dovetail slide rail and dovetail slide groove, and is fixed by screws after the limiting frame 81 slides to the corresponding position. When sampling in high-temperature / loose strata, the sampling device first uses the drill pipe 43 to pass through the limiting sleeve 82 to make preliminary drilling. After the drilling is completed, the limiting sleeve 82 is inserted into the hole and the limiting retaining ring 83 is pressed against the soil around the hole opening. This can effectively prevent soil fragments and debris from falling into the borehole, avoid contaminating the rock core or blocking the sampling channel, thereby improving the integrity of the geological sample and the sampling quality.

[0040] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drilling and sampling device for geological exploration of coal seam fire areas, comprising a base plate (1) and a plurality of movable wheels (11) fixed on the bottom surface of the base plate (1); characterized in that, A support arm (3) is provided on the upper part of the substrate (1) in a vertical direction. A vertically downward fixing plate (31) is fixed on one side edge of the bottom surface of the support arm (3). A drilling assembly (4) is provided on the vertical side of the support arm (3) near the fixing plate (31). The bottom edge of the support arm (3) away from the fixing plate (31) is rotatably connected to the top surface of the substrate (1). The support arm (3) can be rotated to a vertically upward application state and to a horizontal transport state that abuts against the top surface of the substrate (1). The substrate (1) is provided with a locking member (2). When the support arm (3) is in the application state, the vertical inner side of the fixing plate (31) abuts against the vertical side of the substrate (1). The locking member (2) is used to detachably fix the fixing plate (31) to the vertical side of the substrate (1).

2. The drilling and sampling device for geological exploration of coal seam fire zones according to claim 1, characterized in that, When the support arm (3) is in the application state, a limiting frame (81) that can slide up and down and be fixed is provided on the side away from the substrate (1). At this time, a limiting sleeve (82) located directly below the drilling assembly (4) is fixed on the bottom surface of the limiting frame (81) along the horizontal direction. A limiting retaining ring (83) is fixed on the outer edge of the top surface of the limiting sleeve (82). The drilling assembly (4) can penetrate the limiting sleeve (82) to perform preliminary drilling. After the drilling assembly (4) performs preliminary drilling, the limiting sleeve (82) can move down and be inserted into the drilled hole. At this time, the bottom surface of the limiting retaining ring (83) abuts against the outer edge of the top surface of the drilled hole.

3. The drilling and sampling device for geological exploration of coal seam fire zones according to claim 1, characterized in that, The locking component (2) is a locking bolt (21). A fixing through hole is provided on the fixing plate (31), and a fixing screw hole is provided on the vertical side of the base plate (1). When the support arm (3) is in the application state, the fixing through hole coincides with the fixing screw hole, and the locking bolt (21) passes through the fixing through hole and is screwed into the fixing screw hole.

4. The drilling and sampling device for geological exploration of coal seam fire zones according to claim 1, characterized in that, Two positioning rods (51) are fixedly fixed on the top surface of the substrate (1) in the vertical direction, which are symmetrically arranged on opposite sides of the support arm (3). A connecting rod (52) is rotatably installed on the top surface of the positioning rod (51). A limiting member (7) is provided on the bottom surface of the connecting rod (52). The rotating surface of the connecting rod (52) is parallel to the top surface of the substrate (1). A support rod (53) is rotatably mounted on the end face of the connecting rod (52) away from the positioning rod (51). The rotating surface of the support rod (53) is parallel to the side of the positioning rod (51). An adjusting part (6) is provided on the outer periphery of the support rod (53). When the support arm (3) is in the application state, the two connecting rods (52) rotate in the direction away from the support arm (3) to be parallel to each other and perpendicular to the fixed plate (31) and locked by the limiting part (7). At this time, the two support rods (53) rotate to the support state with the lower end face in contact with the ground. When the support arm (3) is in the transport state, the two connecting rods (52) rotate in a direction away from the support arm (3) to a storage state that is parallel to each other and parallel to the support arm (3) and are locked by the limiting member (7). At this time, the two support rods (53) rotate towards each other to a traction state that is coaxial and with their end faces abutting and are fixed by the adjusting member (6). At this time, the bottom surface of the support rod (53) abuts against the top surface of the drilling assembly (4) on the support arm (3).

5. A drilling and sampling device for geological exploration of coal seam fire zones according to claim 4, characterized in that, The adjusting member (6) includes an intermediate rod (61) vertically fixed on the outer periphery of the support rod (53); when the support rod (53) is in a traction state, the intermediate rod (61) is located on the top surface of the support rod (53), and at this time, the upper surfaces of the two intermediate rods (61) are vertically fixed with an elastic adjusting rod (62) having elastic elongation properties along the direction of mutual approach. An adjustment block (621) and an adjustment slot (622) are fixed on the end face of the elastic adjustment rod (62) away from the intermediate rod (61). When the support rod (53) is in a traction state, the adjustment block (621) on one of the two elastic adjustment rods (62) is inserted into the adjustment slot (622) on the other. When the support rod (53) is in a support state, the elastic adjustment rod (62) is vertically downward and the bottom surface of the adjustment block (621) is in contact with the ground.

6. The drilling and sampling device for geological exploration of coal seam fire zones according to claim 5, characterized in that, The adjusting plug (621) has a guide slope (6211) on the outer edge of its side away from the elastic adjusting rod (62).

7. A drilling and sampling device for geological exploration of coal seam fire zones according to claim 4, characterized in that, The limiting member (7) includes an elastic limiting rod (71) with one end rotatably connected to the bottom surface of the connecting rod (52) and having elastic elongation performance. The support arm (3) has a first slot (32) on its vertical side facing the positioning rod (51), and the base plate (1) has a second slot (12) on its top surface. The elastic limiting rod (71) can rotate to a horizontal position and be inserted into the first slot (32) in the direction close to the support arm (3) when the two connecting rods (52) are in the extended state, and can rotate to a vertical downward position and be inserted into the second slot (12) when the two connecting rods (52) are in the retracted state.

8. A drilling and sampling device for geological exploration of coal seam fire zones according to claim 7, characterized in that, The elastic limiting rod (71) has a guide slope (711) at the outer edge of its end face away from the connecting rod (52).

9. A drilling and sampling device for geological exploration of coal seam fire zones according to claim 7, characterized in that, An elastic snap-fit ​​member (72) is provided on the outer periphery of the end of the elastic limiting rod (71) away from the connecting rod (52), and a positioning groove (121) for the elastic snap-fit ​​member (72) to be snapped into is provided on the side wall of the first slot (32) and the second slot (12).

10. A drilling and sampling device for geological exploration of coal seam fire zones according to claim 9, characterized in that, The elastic snap-fit ​​component (72) includes a compression spring (721) and an arc-shaped protrusion (722). The elastic limiting rod (71) has a placement groove (712) for the compression spring (721) and the arc-shaped protrusion (722) to be placed. The compression spring (721) squeezes one side of the arc-shaped protrusion (722) so that a part of the arc-shaped protrusion (722) protrudes from the opening of the placement groove (712). The outer side of the protruding part of the arc-shaped protrusion (722) is an arc surface, and the arc length corresponding to the arc surface is a minor arc.

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