Drill pipe positioning device for a geological coring rig

Abstract

The present application provides a kind of drill pipe positioning device of geological coring drilling machine, the drill pipe positioning device of geological coring drilling machine includes fixed frame, propelling mechanism and fine adjustment mechanism, fixed frame includes positioning plate and the multiple supporting legs of being arranged in the bottom of positioning plate, each supporting leg includes fixed rod and the adjusting rod that is slidably matched with fixed rod in up-down direction;Propelling mechanism is arranged on the positioning plate, the propelling mechanism has the propelling portion of up-down movement, and is slidably matched with the positioning shaft sleeve;Fine adjustment mechanism is arranged on the outer periphery of supporting leg, and the fine adjustment mechanism includes the first fixed block that is fixedly connected with fixed rod, the second fixed block that is fixedly connected with adjusting rod and the connecting rod that is arranged between the first fixed block and the second fixed block.The drill pipe positioning device of geological coring drilling machine of the present application is connected with fixed rod and adjusting rod respectively by fine adjustment mechanism, for the height of supporting leg is slightly adjusted, so that the height of fixed frame is accurately reached preset value.

Description

Technical Field

[0001] This invention belongs to the technical field of drilling rig auxiliary equipment, specifically relating to a drill rod positioning device for geological coring drilling rigs. Background Technology

[0002] Geological exploration refers to the activities of investigating, analyzing, and evaluating the geological and environmental characteristics and geotechnical engineering conditions of a construction site according to the requirements of a construction project, and preparing exploration documents. Its purpose is to provide the engineering geological and geotechnical engineering data needed for basic design and construction, as well as foundation reinforcement when necessary.

[0003] During exploration, core sampling is necessary to understand the geological conditions of the strata, facilitating the testing of the drilled cores. Existing core drilling rigs experience severe shaking when the core barrel contacts the ground. To ensure core quality, the rig needs to be mounted on a support frame. However, existing frames cannot precisely adjust their height, resulting in shallow drilling depths that fail to yield rock samples of specific lengths. Furthermore, the lack of drill rod restraint makes it difficult to maintain drill rod verticality during drilling, frequently leading to problems such as drill bit jamming and borehole deviation. This can even disturb samples with joints and fractures, rendering the drilled cores unsuitable for experimental requirements. Summary of the Invention

[0004] This invention provides a drill rod positioning device for a geological coring drill, which aims to solve the technical problems in the prior art where the support of the coring drill cannot be precisely adjusted in height, making it impossible to obtain rock samples of a specific length, and where there is no constraint during drilling.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a drill rod positioning device for a geological coring drill, comprising:

[0006] The fixed frame includes a positioning plate and multiple support legs disposed at the bottom of the positioning plate. Each support leg includes a fixed rod and an adjusting rod that slides with the fixed rod in the vertical direction. The positioning plate is fixed to the top of the adjusting rod. The fixed frame also includes a positioning bushing connected to the fixed rod. The axial direction of the positioning bushing is parallel to the vertical direction.

[0007] A propulsion mechanism, disposed on the positioning plate, includes a vertically movable propulsion part inserted into and slidingly engaged with the positioning bushing; and

[0008] A fine-tuning mechanism is provided in a one-to-one correspondence with each of the outriggers. The fine-tuning mechanism includes a first fixing block fixedly connected to the fixing rod, a second fixing block fixedly connected to the adjusting rod, and a connecting rod disposed between the first fixing block and the second fixing block. The second fixing block is sleeved on the top end of the connecting rod and can be adjusted up and down.

[0009] In one possible implementation, the adjusting rod is provided with a plurality of positioning holes, and the fixing rod is provided with a plurality of elongated holes corresponding one-to-one with the positioning holes, and fastening bolts are fitted between the elongated holes and the positioning holes.

[0010] In one possible implementation, the second fixing block is provided with a first through hole that slides with the connecting rod, and the connecting rod is provided with a limiting nut that abuts against the bottom of the second fixing block.

[0011] In one possible implementation, a bearing is provided between the first fixing block and the connecting rod, the inner ring of the bearing is fixedly connected to the connecting rod, the outer ring of the bearing is fixedly connected to the first fixing block, the outer periphery of the connecting rod is provided with an external thread, and the second fixing block is provided with a first threaded hole that mates with the external thread.

[0012] In one possible implementation, the positioning plate is provided with a second threaded hole that extends vertically, and the propulsion mechanism includes:

[0013] The push rod mates with the second threaded hole;

[0014] A mounting plate is provided at the bottom end of the push rod; and

[0015] A drilling rig is mounted on the mounting plate, and the drill rod of the drilling rig forms the propulsion section.

[0016] In one possible implementation, the positioning plate is provided with a detachable positioning block, and the second threaded hole is provided in the positioning block.

[0017] In one possible implementation, a plurality of mounting rods are evenly distributed around the outer periphery of the positioning bushing, and the end of each mounting rod facing away from the positioning bushing is connected to the fixing rod.

[0018] In one possible implementation, the mounting rod includes:

[0019] An outer rod has an internal cavity, and the outer rod has a plurality of second through holes that communicate with the cavity at intervals along its own axial direction;

[0020] The inner sleeve rod slides in conjunction with the cavity. The inner sleeve rod has a limiting cavity that mates with the second through hole. It also has a limiting block located in the limiting cavity and extending out of the outer periphery of the inner sleeve rod. A spring is connected to the inner wall of the limiting cavity and the spring has a preload force that causes the limiting block to protrude out of the outer periphery of the inner sleeve rod.

[0021] In one possible implementation, a pad is provided at one end of the outrigger facing the positioning plate, and the positioning plate is provided with multiple sets of bolt holes that mate with the pad. The multiple sets of bolt holes are used to adjust the position of the multiple outriggers connected to the positioning plate.

[0022] In one possible implementation, at least one diagonal brace is provided between adjacent legs, and the diagonal brace is detachably connected to the adjacent legs by bolts.

[0023] The drill rod positioning device for a geological coring drill provided in this embodiment, compared with the prior art, features a fixed frame with multiple legs. A fixed rod and an adjusting rod slide together to adjust the height of the legs. This design is suitable for terrains where there is a height difference between the ground on both sides of the fixed frame, and facilitates the transport of the legs, making it suitable for field operations. The propulsion mechanism has a vertically movable propulsion section that slides together with a positioning sleeve, which restricts the propulsion section. A fine-tuning mechanism is connected to both the fixed rod and the adjusting rod. During use, the adjusting rod is inserted into the fixed rod, and a second fixed block moves vertically along the connecting rod axis, thus slightly adjusting the height of the legs. This invention's drill rod positioning device for a geological coring drill, through the sliding engagement of the fixed rod and the adjusting rod, can change the height of the legs, making it suitable for terrains where there is a height difference between the ground on both sides of the fixed frame. The sliding engagement of the propulsion section with the positioning sleeve restricts the propulsion section, preventing wobbling during use. The fine-tuning mechanism, connected to both the fixed rod and the adjusting rod, is used to slightly adjust the height of the legs, ensuring the fixed frame height accurately reaches a preset value. Attached Figure Description

[0024] Figure 1 This is a front view schematic diagram of the drill rod positioning device of the geological coring drill provided in Embodiment 1 of the present invention;

[0025] Figure 2 This is a schematic diagram of the main structure of the drill rod positioning device of the geological coring drill used in Embodiment 2 of the present invention;

[0026] Figure 3 This is a cross-sectional view of the fine-tuning mechanism used in Embodiment 3 of the present invention;

[0027] Figure 4 This is a cross-sectional view of the mounting rod used in Embodiment 3 of the present invention;

[0028] Figure 5 This is a cross-sectional view of the mounting rod used in Embodiment 4 of the present invention;

[0029] Figure 6 This is a schematic diagram of the main structure of the drill rod positioning device of the geological coring drill used in Embodiment 5 of the present invention;

[0030] Figure 7 This is a three-dimensional structural schematic diagram of the drill rod positioning device of the geological coring drill used in Embodiment 5 of the present invention;

[0031] Figure 8 This is a schematic diagram of the main structure of the fine-tuning mechanism used in Embodiment Six of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10-Fixed frame; 11-Support leg; 111-Fixed rod; 1111-Oblong hole; 112-Adjusting rod; 1121-Positioning hole; 12-Positioning plate; 121-Second threaded hole; 122-Positioning block; 13-Positioning bushing; 14-Pad; 15-Diagonal brace;

[0034] 20-Propulsion mechanism; 21-Propulsion section; 22-Propulsion rod; 23-Mounting plate; 24-Drilling rig; 241-Drill rod; 25-Control panel;

[0035] 30 - Fine-tuning mechanism; 31 - First fixing block; 32 - Second fixing block; 321 - First through hole; 322 - First threaded hole; 33 - Connecting rod; 331 - Limit nut; 332 - Bearing; 3321 - Inner ring; 3322 - Outer ring; 333 - Handle;

[0036] 40-Mounting rod; 41-Outer sleeve rod; 411-Second through hole; 412-Cavity; 42-Inner sleeve rod; 421-Limiting cavity; 422-Limiting block; 423-Limiting plate; 424-Spring. Detailed Implementation

[0037] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0038] Please refer to the following: Figure 1 and Figure 7The drill rod positioning device for a geological coring drill rig provided by the present invention will now be described. The drill rod positioning device for the geological coring drill rig includes a fixed frame 10, a propulsion mechanism 20, and a fine-tuning mechanism 30. The fixed frame 10 includes a positioning plate 12 and multiple support legs 11 located at the bottom of the positioning plate 12. Each support leg 11 includes a fixed rod 111 and an adjusting rod 112 that slides vertically with the fixed rod 111. The positioning plate 12 is fixed to the top of the adjusting rod 112. The fixed frame 10 also includes a positioning bushing 13 connected to the fixed rod 111, the axial direction of which is parallel to the vertical direction. The propulsion mechanism... The 20 is mounted on the positioning plate 12. The propulsion mechanism 20 has a propulsion part 21 that moves up and down. The propulsion part 21 is inserted into the positioning bushing 13 and slides with the positioning bushing 13. The fine adjustment mechanism 30 is arranged one-to-one with the support leg 11. The fine adjustment mechanism 30 includes a first fixing block 31 fixed to the fixing rod 111, a second fixing block 32 fixed to the adjusting rod 112, and a connecting rod 33 located between the first fixing block 31 and the second fixing block 32. The second fixing block 32 is sleeved on the top of the connecting rod 33 and can be adjusted up and down.

[0039] Compared with the prior art, the drill rod positioning device for the geological coring drill provided in this embodiment, by setting a fixed frame 10, which includes multiple support legs 11, and a fixed rod 111 and an adjusting rod 112 slidingly engaged, can adjust the height of the support legs 11. It is suitable for terrains where there is a height difference between the ground on both sides of the fixed frame 10, and is convenient for transporting the support legs 11, thus making it suitable for field operations. The propulsion mechanism 20 has a propulsion part 21 that moves up and down, and slidesly engaged with a positioning bushing 13. The positioning bushing 13 restricts the propulsion part 21. The fine adjustment mechanism 30 is connected to the fixed rod 111 and the adjusting rod 112 respectively. In use, the adjusting rod 112 is placed into the fixed rod 111, and the second fixed block 32 moves up and down along the connecting rod 33 axis, thereby slightly adjusting the height of the support legs 11. The drill rod positioning device of the geological coring drill of the present invention can change the height of the outrigger 11 by slidingly engaging the fixed rod 111 and the adjusting rod 112. It is applicable to terrains where there is a height difference between the ground on both sides of the fixed frame 10. The propulsion part 21 is slidably engaged with the positioning bushing 13 to restrict the propulsion part 21 and prevent the propulsion mechanism 20 from shaking during use. The fine adjustment mechanism 30 is connected to the fixed rod 111 and the adjusting rod 112 respectively, and is used to finely adjust the height of the outrigger 11 so that the height of the fixed frame 10 accurately reaches the preset value.

[0040] In some embodiments, an improved implementation of the drill rod positioning device of the above-mentioned geological coring drill rig can adopt, as follows: Figure 1 The structure shown. See also Figure 1The adjusting rod 112 has multiple positioning holes 1121, and the fixing rod 111 has multiple elongated holes 1111 corresponding to the positioning holes 1121. Fastening bolts are fitted between the elongated holes 1111 and the positioning holes 1121. Before installation, the fixing rod 111 is fixed to the ground. At this time, the connecting rod 33 is not installed. The adjusting rod 112 is inserted into the fixing rod 111, and the height is roughly adjusted so that the elongated holes 1111 correspond to the positioning holes 1121. The fastening bolts are then installed (but not tightened). Then the connecting rod 33 is installed. The positioning plate 12 is observed to be horizontal (which also indicates whether the drill rod 241 is vertical). By adjusting the position of the second fixing block 32 on the connecting rod 33, the adjusting rods 112 can be finely adjusted within the length range of the elongated holes 1111 to ensure the verticality of the fixing frame 10 to the ground.

[0041] This embodiment uses a matching elongated hole 1111 and a positioning hole 1121, which makes installation more convenient than two directly corresponding holes connected by fastening bolts. After installation, the length of the elongated hole 1111 can be finely adjusted again.

[0042] It should be noted that the elongated hole 1111 on the first fixing block 31 and the fixing rod 111 are arranged on different sides, and the positioning hole 1121 on the second fixing block 32 and the adjusting rod 112 are arranged on different sides, so as to prevent interference caused by the overlap of the fastening bolts with the connecting rod 33.

[0043] Optionally, the positioning holes 1121 on the adjusting rod 112 are arranged in multiple rows around the outer periphery of the adjusting rod 112, which can be three rows (one row in the vertical direction) with threads. After the fastening bolt is tightened, it mates with the threaded holes and presses the fixing rod 111, thereby strengthening the connection between the fixing rod 111 and the adjusting rod 112. The threaded holes can be arranged in a quincunx pattern.

[0044] Optionally, the elongated holes 1111 can be set in 3 columns, with the elongated holes 1111 in adjacent columns staggered vertically, and similarly, the positioning holes 1121 in adjacent columns also staggered vertically.

[0045] Optionally, the center of the holes in the two outer rows of elongated holes 1111 on the fixed rod 111 corresponds to the position of the two outer rows of positioning holes 1121 on the adjusting rod 112, and the length of the elongated holes 1111 is the row spacing of the two rows of positioning holes 1121; the lower end of the middle row of elongated holes 1111 corresponds to the position of the middle row of positioning holes 1121 on the adjusting rod 112, and the length of the elongated holes 1111 is the row spacing of the middle row of positioning holes 1121.

[0046] In some embodiments, an improved implementation of the drill rod positioning device of the above-mentioned geological coring drill rig can adopt, as follows: Figure 1 The structure shown. See also Figure 1The second fixing block 32 is provided with a first through hole 321 that slides with the connecting rod 33. The connecting rod 33 is provided with a limiting nut 331, which abuts against the bottom of the second fixing block 332. When adjusting the connecting rod 33, the limiting nut 331 is turned. When the limiting nut 331 is turned downwards for adjustment, due to the gravity of the adjusting rod 112 and the positioning plate 12, the second fixing block 32 slides on the connecting rod 33 and always abuts against the top of the limiting nut 331, thereby realizing the fine adjustment of the fine adjustment mechanism 30.

[0047] As a variation of the above embodiment, the connecting rod 33 is hinged to the first fixing block 31 in a horizontal direction. The second fixing block 32 has a through groove on the side away from the adjusting rod 112 that cooperates with the connecting rod 33. The outer side of the second fixing block 32 is also provided with a pin to prevent the connecting rod 33 from disengaging from the through groove. In specific implementation, the adjusting rod 112 is placed into the fixing rod 111, and the connecting rod 33 is moved to rotate around the hinge axis, with the upper part of the connecting rod entering the through groove. Then, the pin is moved to prevent the connecting rod 33 from disengaging from the through groove under the influence of external force. The second fixing block abuts against the top of the limiting nut 331. Rotating the limiting nut 331, the fine adjustment mechanism 30 is thus achieved (e.g., Figure 8 As shown, the structure of the latch and the connection method of the second fixing block 32 can be referred to the structure of the latch on the door.

[0048] Specifically, the connecting rod 33 is also provided with another limiting nut 331 that abuts against the upper part of the second fixing block 32. The two limiting nuts 331 are clamped on the upper and lower sides of the second fixing block 32 to improve stability (e.g., Figure 2 (As shown).

[0049] Specifically, the connecting rod 33 and the first fixing block 31 can also be limited by two limiting nuts 331. When the connecting rod 33 is damaged or needs to be replaced with a different connecting rod 33, the limiting nuts 331 can be turned to facilitate the disassembly of the connecting rod 33 by the staff (e.g., Figure 2 (As shown).

[0050] In some embodiments, an improved implementation of the fine-tuning mechanism 30 described above may employ, as follows: Figure 3 The structure shown. See also Figure 3A bearing 332 is provided between the first fixing block 31 and the connecting rod 33. The inner ring 3321 of the bearing 332 is fixedly connected to the connecting rod 33, and the outer ring 3322 of the bearing 332 is fixedly connected to the first fixing block 31. The outer circumference of the connecting rod 33 is provided with external threads, and the second fixing block 32 is provided with a first threaded hole 322 that mates with the external threads. It should be noted that the vertical positions of the connecting rod 33 and the first fixing block 31 are fixed. If the height needs to be adjusted, the connecting rod 33 can be rotated, and the connecting rod 33 and the second fixing block 32 are threadedly engaged, causing the second fixing block 32 to move up and down on the connecting rod 33. The bearing 332 can reduce the rotational friction between the connecting rod 33 and the first fixing block 31, making it easier for operators to operate.

[0051] It should be noted that bearing 332 can be fixed in the vertical direction by press-fitting.

[0052] Specifically, the bottom of the connecting rod 33 is provided with a handle 333, which can be disc-shaped or rectangular, making it convenient to turn and adjust the connecting rod 33, and allowing for flexible use (e.g., Figure 3 (As shown).

[0053] In some embodiments, an improved implementation of the drill rod positioning device of the above-mentioned geological coring drill rig can adopt, as follows: Figure 6 The structure shown. See also Figure 6 The positioning plate 12 has a second threaded hole 121 that runs vertically through it. The propulsion mechanism 20 includes a propulsion rod 22, a mounting plate 23, and a drill rig 24. The propulsion rod 22 engages with the second threaded hole 121. The mounting plate 23 is located at the bottom end of the propulsion rod 22. The drill rig 24 is mounted on the mounting plate 23, and the drill rod 241 of the drill rig 24 forms the propulsion part 21. In this embodiment, the drill rod 241 is constrained and guided by the positioning bushing 13 to prevent the drill rod 241 from tilting during core drilling, which would result in insufficient drilling depth. The propulsion rod 22 engages with the second threaded hole 121, and the distance the drill rod 241 moves vertically can be controlled by rotating the propulsion rod 22, thereby precisely controlling the movement distance of the drill rod 241.

[0054] Optionally, a circular control panel 25 may be provided at the end of the push rod 22 away from the push section 21 to facilitate operation by the operator (e.g., Figure 6 (As shown).

[0055] It should be noted that the distance between the end of the drill rod 241 closest to the drill rig 24 and the positioning sleeve 13 is greater than the distance that the drill rod 241 needs to move when drilling into the ground for core sampling, so as to avoid collision between the drill rig 24 and the positioning sleeve 13 during the core sampling process.

[0056] In some embodiments, an improved implementation of the drill rod positioning device of the above-mentioned geological coring drill rig can adopt, as follows: Figure 6 The structure shown. See also Figure 6 The positioning plate 12 is provided with a detachable positioning block 122, and a second threaded hole 121 is provided in the positioning block 122. The positioning block 122 is provided with a second threaded hole 121, and the positioning block 122 is detachably connected to the positioning plate 12. When the second threaded hole 121 is damaged due to long-term use of the propulsion mechanism 20, the normal use of the propulsion mechanism 20 can be ensured by replacing the positioning block 122. Compared with replacing a new positioning plate 12, the cost is effectively reduced.

[0057] Optionally, the positioning block 122 and the positioning plate 12 can be detachably connected by means of threaded connection, snap-fit ​​connection and hinge connection.

[0058] In some embodiments, an improved implementation of the drill rod positioning device of the above-mentioned geological coring drill rig can adopt, as follows: Figure 6 The structure shown. See also Figure 6 Multiple mounting rods 40 are evenly distributed around the outer periphery of the positioning bushing 13. The end of each mounting rod 40 facing away from the positioning bushing 13 is connected to the fixing rod 111. By setting the mounting rods 40, the position of the positioning bushing 13 on the fixing frame 10 is fixed, and the connection between the positioning bushing 13 and the support leg 11 is strengthened, thereby effectively improving the overall strength of the fixing frame 10.

[0059] In some embodiments, an improved implementation of the drill rod positioning device of the above-mentioned geological coring drill rig can adopt, as follows: Figure 4 The structure shown. See also Figure 4 The mounting rod 40 includes an outer sleeve rod 41 and an inner sleeve rod 42. The outer sleeve rod 41 has a cavity 412 inside, and multiple second through holes 411 communicating with the cavity 412 are spaced along its own axial direction on the outer sleeve rod 41. The inner sleeve rod 42 is slidably engaged with the cavity 412. The inner sleeve rod 42 has a limiting cavity 421 that cooperates with the second through holes 411. It also has a limiting block 422 located in the limiting cavity 421 and extending out of the outer periphery of the inner sleeve rod 42. A spring 424 is connected to the inner wall of the limiting cavity 421 to the limiting block 422. The spring 424 has a preload force that causes the limiting block 422 to protrude out of the outer periphery of the inner sleeve rod 42. Ideally, the four mounting rods 40 should be the same length. If the ground is relatively sloping, the positioning sleeve 13 may tilt, which may cause the length of some mounting rods 40 to need to be adjusted. In this case, the operator can press the limiting block 422, and the limiting block 422 will enter the limiting cavity 421. At this time, the inner sleeve rod 42 can slide in the cavity 421. When the length of the mounting rod 40 reaches the required length, the spring 424 pushes out the limiting block 422, and the limiting block 422 is inserted into the second through hole 411 at the corresponding position, thus completing the length adjustment of the mounting rod 40.

[0060] Specifically, the inner sleeve rod 42 is provided with a hole for the limiting block 422 to extend out. The diameter of the hole is smaller than the minimum width of the limiting cavity 421. A limiting plate 423 is fixed on the side of the limiting block 422 facing the spring 424. The limiting plate 423 is used to prevent the limiting block 422 from dislodging from the limiting cavity 421 (e.g., Figure 5 (as shown); and the limiting plate 423 has a large surface area, allowing for the installation of multiple springs 424, making the adjustment structure more stable.

[0061] In some embodiments, an improved implementation of the drill rod positioning device of the above-mentioned geological coring drill rig can adopt, as follows: Figure 6 The structure shown. See also Figure 6 One end of the outrigger 11 facing the positioning plate 12 is provided with a pad 14. The positioning plate 12 has multiple sets of bolt holes that mate with the pad 14. These bolt holes are used to adjust the connection position of the multiple outriggers 11 with the positioning plate 12. Compared to welding between the positioning plate 12 and the outriggers 11, this embodiment uses a detachable connection between the outriggers 11 and the positioning plate 12. When the drilling rig 24 needs to change positions after core drilling, the outriggers 11 can be removed from the positioning plate 12 at any time, facilitating operation by the staff. By providing multiple sets of bolt holes, when the working surface is narrow, the connection position of the outriggers 11 on the positioning plate 12 can be adjusted according to the actual situation, changing the size of the space occupied by the fixing frame 10. The fixing frame 10 can be used in narrow terrain, thus meeting the usage needs under different terrain conditions.

[0062] Optionally, the end of the outrigger 11 facing the ground may also be equipped with a pad 14, which can be connected to the ground via anchor bolts, facilitating the disassembly of the outrigger 11 by workers after the core drilling rig 24 has completed its core sampling. Figure 6 (As shown).

[0063] In some embodiments, an improved implementation of the drill rod positioning device of the above-mentioned geological coring drill rig can adopt, as follows: Figure 6 The structure shown. See also Figure 6 At least one diagonal brace 15 is also provided between the legs 11, and the diagonal brace 15 is detachably connected to the adjacent legs 11 by bolts. In this embodiment, by setting the diagonal brace 15, the connection between adjacent legs 11 is effectively strengthened, the stability of the fixing frame 10 is effectively improved, and the overall strength of the drill rod positioning device of the geological core drilling rig of this application is improved.

[0064] Optionally, when the connection position of the outrigger 11 with the positioning plate 12 is changed according to the terrain, if there are multiple diagonal braces 15 between two adjacent outriggers 11, the diagonal braces 15 can be arranged crosswise, and the cross diagonal braces 15 can be connected by welding to improve the connection strength between adjacent outriggers 11; two adjacent diagonal braces 15 can also be connected by bolts, and by loosening the bolts, the included angle between the two cross diagonal braces 15 can be adjusted to meet the usage requirements under different conditions.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drill rod positioning device for a geological core drilling rig, characterized in that, include: The fixing frame includes a positioning plate and multiple support legs located at the bottom of the positioning plate. Each support leg includes a fixing rod and an adjusting rod that slides with the fixing rod in the vertical direction. The adjusting rod has multiple positioning holes, and the fixing rod has multiple elongated holes that correspond one-to-one with the positioning holes. Fastening bolts are fitted between the elongated holes and the positioning holes. The positioning plate is fixed to the top of the adjusting rod. The fixing frame also includes a positioning bushing connected to the fixing rod, and the axial direction of the positioning bushing is parallel to the vertical direction. A propulsion mechanism, disposed on the positioning plate, includes a vertically movable propulsion part inserted into and slidingly engaged with the positioning bushing; and A fine-tuning mechanism is provided, corresponding to each of the outriggers. The fine-tuning mechanism includes a first fixing block fixedly connected to the fixing rod, a second fixing block fixedly connected to the adjusting rod, and a connecting rod disposed between the first fixing block and the second fixing block. The second fixing block is sleeved on the top end of the connecting rod and can be adjusted up and down. The second fixing block has a first through hole that slides with the connecting rod. The connecting rod has a limiting nut that abuts against the bottom of the second fixing block. The connecting rod is hinged to the first fixing block in a horizontal direction. The side of the second fixing block away from the adjusting rod has a through groove that mates with the connecting rod. The outer side of the second fixing block also has a pin to prevent the connecting rod from disengaging from the through groove.

2. The drill rod positioning device for a geological coring drill as described in claim 1, characterized in that, A bearing is provided between the first fixing block and the connecting rod. The inner ring of the bearing is fixedly connected to the connecting rod, and the outer ring of the bearing is fixedly connected to the first fixing block. The outer circumference of the connecting rod is provided with an external thread, and the second fixing block is provided with a first threaded hole that mates with the external thread.

3. The drill rod positioning device for a geological coring drill as described in claim 1, characterized in that, The positioning plate is provided with a second threaded hole that extends vertically through the center, and the propulsion mechanism includes: The push rod mates with the second threaded hole; A mounting plate is provided at the bottom end of the push rod; and A drilling rig is mounted on the mounting plate, and the drill rod of the drilling rig forms the propulsion section.

4. The drill rod positioning device for a geological coring drill as described in claim 3, characterized in that, The positioning plate is provided with a detachable positioning block, and the second threaded hole is provided in the positioning block.

5. The drill rod positioning device for a geological coring drill as described in claim 1, characterized in that, Multiple mounting rods are evenly distributed around the outer periphery of the positioning bushing, and the end of each mounting rod facing away from the positioning bushing is connected to the fixing rod.

6. The drill rod positioning device for a geological coring drill as described in claim 5, characterized in that, The mounting rod includes: An outer rod has an internal cavity, and the outer rod has a plurality of second through holes that communicate with the cavity at intervals along its own axial direction; The inner sleeve rod slides in conjunction with the cavity. The inner sleeve rod has a limiting cavity that mates with the second through hole. It also has a limiting block located in the limiting cavity and extending out of the outer periphery of the inner sleeve rod. A spring is connected to the inner wall of the limiting cavity and the spring has a preload force that causes the limiting block to protrude out of the outer periphery of the inner sleeve rod.

7. The drill rod positioning device for a geological coring drill as described in claim 1, characterized in that, The support leg has a pad at one end facing the positioning plate. The positioning plate has multiple sets of bolt holes that mate with the pad. These multiple sets of bolt holes are used to adjust the position of the support legs connected to the positioning plate.

8. The drill rod positioning device for a geological coring drill as described in claim 1, characterized in that, At least one diagonal brace is provided between adjacent legs, and the diagonal brace is detachably connected to the adjacent legs by bolts.

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