Device and system for preparing cylindrical layered rock samples with different layer inclination angles

Abstract

The utility model provides a device and a system for preparing cylindrical layered rock samples with different layer inclination angles. The device comprises a fixed base and a sample bracket, the fixing base comprises a bottom frame, a fixing lug and two adjusting plates, the adjusting plates are arranged on the bottom frame, the two adjusting plates are arranged in parallel at intervals and provided with angle adjusting limiting holes, and base fixing holes are formed in the fixing lug; the sample bracket comprises a supporting plate, an angle limiting rod and two jacking seats, one end of the supporting plate is hinged to the bottom frame and provided with a vertical support, and the two jacking seats are oppositely arranged on the vertical support at intervals, so that the distance between the two jacking seats is adjustable. An angle limiting rod moving hole is formed in the other end of the supporting plate in the length direction, an angle limiting rod is slidably arranged in the angle limiting rod moving hole and the angle adjusting limiting hole in a penetrating mode, and limiting rod tightening nuts are installed at the two ends, penetrating out of the angle adjusting limiting hole, of the angle limiting rod. And on the basis of ensuring stable clamping of the blank, accurate adjustment of the inclination angle of the bedding surface of the sample is realized, and the sample preparation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rock mechanics engineering tests, and particularly relates to a preparation device and system for cylindrical layered rock specimens with different bedding plane inclinations. Background Art

[0002] Layered rock mass is a common type of rock mass in engineering. Due to the bedding structure, its mechanical properties show obvious anisotropic characteristics, which have a significant impact on engineering safety. The bedding plane inclination is one of the main factors leading to its anisotropy. Therefore, studying the influence of different bedding plane inclinations on the mechanical properties of layered rock mass is a necessary task, and the commonly used research method is to conduct indoor rock mechanics tests.

[0003] In the related art, during indoor rock tests, cylindrical specimens with a diameter of Φ50mm * 100mm need to be prepared according to existing test standards for various mechanical tests, such as uniaxial and triaxial mechanical tests. Currently, the conventional sampling method is to use a core drilling machine to drill and sample the rock material.

[0004] Domestic core drilling machines mainly adopt vertical core drilling. Most of the fixtures use pressing bars or double plates for clamping, and a small number use the principle of three-jaw clamping of workpieces. Since the fixtures with the working principles of pressing bars and pressing plates cannot clamp and core small-diameter and irregular rock samples, the three-jaw fixture can only clamp the center of regular cylindrical shapes, and it is easy to cause stress concentration due to uneven stress, resulting in the failure of the rock sample. At the same time, the shape of the raw material is extremely irregular and difficult to clamp, resulting in the problem that the required bedding plane inclination is difficult to accurately adjust, causing waste of sampling materials. Summary of the Utility Model

[0005] The embodiment of the utility model provides a preparation device and system for cylindrical layered rock specimens with different bedding plane inclinations, which can accurately adjust the bedding plane inclination of the specimen on the basis of ensuring stable clamping of the raw material and improve the sampling efficiency. The technical solution is as follows:

[0006] In the first aspect, the embodiment of the utility model provides a preparation device for cylindrical layered rock specimens with different bedding plane inclinations, including: a fixed base and a specimen support base,

[0007] The fixed base includes a base frame, fixed ears and two adjusting plates. The base frame has an installation surface. The adjusting plates protrude from the installation surface and are perpendicularly connected to the base plate. The two adjusting plates are arranged in parallel at intervals. The adjusting plates are provided with arc-shaped angle adjustment limit holes. The fixed ears are connected to the base frame and have base fixing holes above;

[0008] The sample holder includes a support plate, angle limit rods, and two tightening seats. The support plate is rectangular and is hinged to the chassis at one end in the length direction. A vertical bracket is provided on the support plate. The two tightening seats are arranged oppositely and spaced apart and are connected to the vertical bracket. The distance between the two tightening seats is adjustable. The other end of the support plate in the length direction is located between the two adjusting plates, and an angle limit rod moving hole is formed in the plate body. The angle limit rod moving hole is arranged along the length direction of the support plate. The angle limit rod is slidably inserted into the angle limit rod moving hole, and both ends are respectively slidably inserted into the angle adjusting limit holes on the two adjusting plates. Tightening nuts for the limit rods are installed at both ends of the angle limit rod protruding from the angle adjusting limit holes.

[0009] Optionally, a plurality of limit grooves are provided on the inner arc of the angle adjusting limit hole, and the plurality of limit grooves are evenly spaced.

[0010] Optionally, the bottom of the limit groove is arc-shaped.

[0011] Optionally, the vertical bracket includes a connecting plate and two support plates. The connecting plate is vertically provided at one end of the support plate in the length direction. The two support plates are vertically connected to both ends of the connecting plate. The bottom of the tightening seat is located on the support plate. The two tightening seats are arranged between the two support plates, and an adjusting screw is movably connected to the opposite sides. The adjusting screw is rotatably and vertically inserted through the adjacent support plate, and a tightening handle is provided at one end of the adjusting screw away from the tightening seat.

[0012] Optionally, a longitudinal adjusting groove is provided on the support plate, and the longitudinal adjusting groove is arranged in a direction perpendicular to the support plate. The adjusting screw is slidably inserted into the longitudinal adjusting groove.

[0013] Optionally, a tightening plate is detachably connected to the opposite side of the two tightening seats, and the tightening plate is a rubber material part.

[0014] Optionally, a plurality of arc-shaped limit teeth are arranged in a row on the surface of the tightening plate facing away from the tightening seat.

[0015] Optionally, there are two fixing ears, and they are symmetrically arranged on both sides of the chassis.

[0016] In a second aspect, an embodiment of the present invention provides a preparation system, which includes the cylindrical layered rock sample preparation device with different layer inclination angles described in the first aspect above, and further includes a core drilling machine. The core drilling machine includes a core drill bit and a workbench located below the core drill bit. A limit screw matching the base fixing hole is vertically connected to the workbench, and a tightening nut for the limit rod is installed on the limit screw.

[0017] Optionally, the base fixing holes are strip-shaped holes and are arranged in a direction perpendicular to the adjusting plate. In the horizontal direction, the relative position between the workbench and the core drill bit is adjustable.

[0018] The beneficial effects brought by the technical solutions provided by the embodiments of the present invention at least include:

[0019] By using the device for preparing cylindrical layered rock specimens with different layer dip angles provided by the embodiments of the present invention, for the retrieved raw rock blocks on-site, the bottom is supported by the supporting plate, and the two sides are laterally tightened by the top tightening seats with adjustable spacing. The raw rock blocks are fixed on the top of the specimen support through multi-directional clamping. Then, by turning the limit nut at both ends of the adjusting angle limit rod, the free end of the supporting plate, that is, the other end in the length direction, is locked and unlocked with the two adjusting plates. The tester can rotate the supporting plate around the hinge end relative to the chassis by adjusting the lifting angle of the supporting plate, and confirm the adjustment angle according to the arc angle limit hole. After the adjustment is in place, the angle between the upper raw rock block and the core drill bit on the top core drilling machine is the same as the layer bedding dip angle required for sample preparation, which is convenient for subsequent drilling and sampling. It can accurately adjust the layer bedding dip angle of the specimen on the basis of ensuring stable clamping of the raw material, improve the sample preparation efficiency, and reduce the material waste caused by inaccurate positioning adjustment. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 is a three-dimensional structural schematic diagram of the device for preparing cylindrical layered rock specimens with different layer dip angles provided by the embodiments of the present invention;

[0022] Figure 2 is a structural schematic diagram of the fixed base provided by the embodiments of the present invention;

[0023] Figure 3 is a structural schematic diagram of the specimen support provided by the embodiments of the present invention;

[0024] Figure 4 is a side view structural schematic diagram of the device for preparing cylindrical layered rock specimens with different layer dip angles provided by the embodiments of the present invention;

[0025] Figure 5It is a schematic three-dimensional structure diagram after angle adjustment of a cylindrical layered rock sample preparation device with different layer inclination angles provided by an embodiment of the present invention;

[0026] Figure 6 It is a schematic three-dimensional structure diagram of another cylindrical layered rock sample preparation device with different layer inclination angles provided by an embodiment of the present invention;

[0027] Figure 7 It is a schematic structure diagram of a preparation system provided by an embodiment of the present invention;

[0028] Figure 8 It is an enlarged view of a partial structure of a preparation system provided by an embodiment of the present invention.

[0029] In the figure: 1 - fixed base; 2 - sample holder; 3 - core drilling machine; 11 - chassis; 11a - mounting surface; 12 - fixing ear; 13 - adjusting plate; 21 - tray; 22 - angle limiting rod; 23 - tightening seat; 24 - vertical support; 31 - core drill bit; 32 - workbench; 33 - stepping rocker; 121 - base fixing hole; 131 - angle adjustment limiting hole; 211 - limiting rod moving hole; 221 - limiting rod tightening nut; 231 - adjusting screw; 232 - tightening handle; 233 - tightening plate; 241 - connecting plate; 242 - support plate; 321 - limiting screw; 1311 - limiting groove; 2331 - arc-shaped limiting teeth; 2421 - longitudinal adjustment groove; a - pin. Detailed implementation manners

[0030] To make the objectives, technical solutions and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in detail with reference to the accompanying drawings.

[0031] Figure 1 It is a schematic three-dimensional structure diagram of a cylindrical layered rock sample preparation device with different layer inclination angles provided by an embodiment of the present invention; Figure 2 It is a schematic structure diagram of the fixed base provided by an embodiment of the present invention; Figure 3 It is a schematic structure diagram of the sample holder provided by an embodiment of the present invention; Figure 4 It is a schematic side view structure diagram of a cylindrical layered rock sample preparation device with different layer inclination angles provided by an embodiment of the present invention; Figure 5 It is a schematic three-dimensional structure diagram after angle adjustment of a cylindrical layered rock sample preparation device with different layer inclination angles provided by an embodiment of the present invention; Figure 6 It is a schematic three-dimensional structure diagram of another cylindrical layered rock sample preparation device with different layer inclination angles provided by an embodiment of the present invention. As Figures 1 to 6 shown, an embodiment of the present invention provides a cylindrical layered rock sample preparation device with different layer inclination angles, including: a fixed base 1 and a sample holder 2.

[0032] Among them, the fixed base 1 includes a chassis 11, fixed lugs 12, and two adjusting plates 13. The chassis 11 has a mounting surface 11a, and the adjusting plates 13 protrude from the mounting surface 11a and are perpendicularly connected to the chassis 11. The two adjusting plates 13 are arranged in parallel at intervals. The adjusting plates 13 are provided with arc-shaped angle-adjusting limit holes 131, and the fixed lugs 12 are connected to the chassis 11 and are provided with base fixing holes 121 above.

[0033] The specimen holder 2 includes a support plate 21, an angle limit rod 22, and two tightening seats 23. The support plate 21 is rectangular, and one end in the length direction is hinged to the chassis 11. The support plate 21 is provided with a vertical bracket 24. The two tightening seats 23 are arranged oppositely at intervals and are connected to the vertical bracket 24, and the distance between the two tightening seats 23 is adjustable. The other end in the length direction of the support plate 21 is located between the two adjusting plates 13, and the plate body is provided with an angle limit rod moving hole 211, and the angle limit rod moving hole 211 is arranged along the length direction of the support plate 21. The angle limit rod 22 is slidably inserted into the angle limit rod moving hole 211, and both ends are respectively slidably inserted into the angle-adjusting limit holes 131 on the two adjusting plates 13. The two ends of the angle limit rod 22 protruding from the angle-adjusting limit holes 131 are provided with limit rod tightening nuts 221.

[0034] In the embodiment of the present utility model, when it is necessary to prepare a layered rock specimen, first place the rough rock block cut by a rock cutting machine on the support plate 21. The rough rock block only needs to be cut to have at least one plane that can support and be placed on the support plate 21. Then, by adjusting the distance between the two tightening seats 23, make the two tightening seats 23 approach each other, and fixedly clamp the rough rock block on the specimen support 2. In the initial state, the support plate 21 of the specimen support 2 is horizontally arranged on the chassis 11 of the fixed base 1 and is in contact with the mounting surface 11a. The limiting rod tightening nuts 221 at both ends of the angle limiting rod 22 are in a tightened state, and the other end in the length direction of the support plate 21 is fixed between the two adjusting plates 13. At this time, unlock the locking between the other end of the support plate 21 and the two adjusting plates 13 by loosening the two limiting rod tightening nuts 221. One end in the length direction of the support plate 21 is hinged to the chassis 11 through a pin a. The tester can lift the support plate 21 from the other end in the length direction of the support plate 21, so that the support plate 21 rotates relative to the chassis 11 around the hinged end. During the rotation process, the angle limiting rod 22 moves along the extension direction of the angle adjustment limiting hole 131, and at the same time also slides relative to the plate body of the support plate 21 along the angle limiting rod moving hole 211. As the lifting angle of the support plate 21 increases, the angle limiting rod 22 also slides in the limiting rod moving hole 211 towards the hinged end of the support plate 21 and the chassis 11, thus avoiding interference during the lifting process. The tester adjusts the lifting angle of the support plate 21 according to the required bedding plane dip angle. After the adjustment is in place, tighten the two limiting rod tightening nuts 221 again to keep the adjusted support plate 21 at this lifting angle and fix it to the two adjusting plates 13 on both sides, completing the adjustment of the bedding plane dip angle of the rough rock block arranged above the support plate 21. Then, place the whole layered rock specimen preparation device loaded with the rough rock block under the core drill 3, and fix it with bolts through the base fixing holes 121 on the fixing ears 12, making the supported rough rock block face the core drill bit 31 of the core drill 3. Then start the core drill 3 and use the core drill bit 31 to drill and sample the rough rock block.

[0035] Using the cylindrical layered rock specimen preparation device with different layer dip angles provided by the embodiments of the present utility model, for the retrieved raw rock blocks on-site, the bottom is supported by the support plate 21, and the sides are tightly clamped by the tightening seats 23 with adjustable spacing on both sides. The raw rock blocks are fixed to the top of the specimen support 2 through multi-directional clamping. Then, by turning the limit rod tightening nuts 221 at both ends of the angle adjustment limit rod 22, the free end of the support plate 21, that is, the other end in the length direction, is locked and released with the adjustment plates 13 on both sides. The tester can rotate the support plate 21 around the hinge end relative to the chassis 11 by adjusting the lifting angle of the support plate 21, and confirm the adjustment angle according to the arc-shaped angle adjustment limit holes 131. After the adjustment is in place, the angle between the upper raw rock block and the core drill bit 31 on the top core drilling machine 3 is the same as the layer dip angle of the sample to be prepared, which is convenient for subsequent drilling and sampling. On the basis of ensuring stable clamping of the raw materials, it can accurately adjust the layer dip angle of the specimen, improve the sample preparation efficiency, and reduce the material waste caused by inaccurate positioning adjustment.

[0036] Optionally, a plurality of limit grooves 1311 are provided on the inner arc of the angle adjustment limit hole 131, and the plurality of limit grooves 1311 are evenly spaced. Exemplarily, in the embodiments of the present invention, and in the embodiments of the present utility model, by arranging a plurality of limit grooves 1311 at equal angular intervals on the inner arc of the angle adjustment limit hole 131, the support and clamping limit fixation after the angle limit rod 22 is in place can be achieved through the angular interval between the limit grooves 1311. Then, the limit rod tightening nut 221 is tightened to ensure the stability and accuracy of the inclination angle adjustment of the support plate 21, and prevent errors in the adjustment of the layer dip angle of the specimen due to shaking during the tightening of the lock. At the same time, by presetting the included angle between the angle adjustment limit holes 131, it is also convenient for the tester to determine the angle during the adjustment process. Exemplarily, in the embodiments of the present utility model, the arc corresponding angle of the angle adjustment limit hole 131 is 90°, and in its arc direction, the angle change value between each limit groove 1311 is 10°. Converted to the adjustable angle change value of the layer surface of the layered rock, it is 5 degrees.

[0037] It should be noted that in the above solution, it is assumed that the layer dip angle of the specimen is the angle between the horizontal bedding plane and the horizontal plane. In the layered rock raw materials with horizontal bedding planes, the present utility model can achieve an inclination angle adjustment of 0-45 degrees; in the layered rock raw materials with vertical bedding planes, the present utility model can achieve an inclination angle adjustment of 45-90 degrees. The difference between the horizontal bedding plane and the vertical bedding plane is only the difference in the placement direction of the rock raw materials.

[0038] Optionally, the bottom of the limiting groove 1311 is an arc surface. Exemplarily, in the embodiment of the present invention, by setting the bottom of the limiting groove 1311 as an arc surface that matches the side wall of the angle limiting rod 22, after the angle limiting rod 22 is snapped into the corresponding limiting groove 1311, it can be smoothly attached to the groove wall of the limiting groove 1311, avoiding abrasion damage during repeated use and adjustment, and improving the overall service life.

[0039] Optionally, the vertical bracket 24 includes a connecting plate 241 and two support plates 242. The connecting plate 241 is vertically arranged at one end of the pallet 21 in the length direction. The two support plates 242 are vertically connected to both ends of the connecting plate 241. The bottom of the tightening seat 23 is located on the pallet 21. The two tightening seats 23 are arranged between the two support plates 242, and an adjusting screw 231 is movably connected to the opposite side. The adjusting screw 231 is rotatably and vertically penetrated through the adjacent support plate 242. A tightening handle 232 is arranged at one end of the adjusting screw 231 away from the tightening seat 23. Exemplarily, in the embodiment of the present invention, the vertical bracket 24 is arranged on the pallet 21, and the connection structure of its connecting plate 241 and the two support plates 242 forms a "C" side plate structure with an opening facing the other end of the pallet 21. When the rough rock block is placed on the pallet 21 for clamping and fixing, it can first abut against the plate surface of the connecting plate 241 to achieve pre-positioning, ensuring that the clamping surfaces of the tightening seats 23 connected to the two side support plates 242 can face the rough rock block. Then, by turning the tightening handle 232, the tightening seat 23 with the top attached to the pallet 21 is driven to move closer to each other through the rotation of the adjusting screw 231 to clamp the rough rock block. By tightening and locking with the tightening handle 232, it is convenient and labor-saving, effectively ensuring the clamping stability.

[0040] Optionally, longitudinal adjusting grooves 2421 are arranged on the support plates 242. The longitudinal adjusting grooves 2421 are arranged in a direction perpendicular to the pallet 21. The adjusting screw 231 is slidably penetrated through the longitudinal adjusting grooves 2421. Exemplarily, in the embodiment of the present invention, by arranging the longitudinal adjusting grooves 2421 on the two support plates 242, when the rough rock block to be clamped has a certain height, the adjusting screw 231 can be moved upward along the direction of the adjusting screw 231, thereby increasing the relative height of the tightening seat 23, enabling the two side tightening seats 23 to sufficiently clamp the middle position of the rough rock block, ensuring the clamping stability, and further improving the adaptability of the specimen preparation device.

[0041] Optionally, a tightening plate 233 is detachably connected to the opposite side of the two tightening seats 23. The tightening plate 233 is a rubber material part. Exemplarily, in the embodiment of the present invention, by arranging an elastic tightening plate 233 made of rubber material on the inner side of the tightening plate 233, the contact area with the irregular rock mass can be increased during the clamping process, improving the clamping stability.

[0042] Optionally, a plurality of arc-shaped limiting teeth 2331 are arranged on the side of the pressing plate 233 facing away from the pressing seat 23. Exemplarily, in the embodiment of the present invention, by arranging arc-shaped limiting teeth 2331 in a convex shape on the plate surface of the pressing plate 233 for clamping, through the groove structure at the tooth tip, the contact area with the irregular rock mass can be further increased during clamping, and the clamping stability can be further improved.

[0043] Optionally, there are two fixing ears 12, which are symmetrically arranged on both sides of the chassis 11. Exemplarily, in the embodiment of the present invention, by symmetrically arranging two fixing ears 12 on both sides of the chassis 11, symmetric multi-point fixing can be realized during bolt fixing, effectively improving the structural stability of the entire device during drilling and sampling.

[0044] Figure 7 is a schematic structural diagram of a preparation system provided by an embodiment of the present invention; Figure 8 is a partially enlarged structural view of a preparation system provided by an embodiment of the present invention. As Figure 7 、 8 shown, the embodiment of the present invention also provides a preparation system, including a cylindrical layered rock sample preparation device with different layer dip angles as Figures 1 to 6 shown, and further including a core drilling machine 3. The core drilling machine 3 includes a core drill bit 31 and a workbench 32 located below the core drill bit 31. A limiting screw 321 matching the base fixing hole 121 is vertically connected to the workbench 32, and a limiting rod tightening nut 221 is installed on the limiting screw 321. Exemplarily, in the embodiment of the present invention, after the rough rock is clamped and fixed on the cylindrical layered rock sample preparation device with different layer dip angles and the bedding plane angle is adjusted, the entire cylindrical layered rock sample preparation device with different layer dip angles can be placed on the workbench 32. During assembly, first remove the limiting rod tightening nut 221 on the limiting screw 321, make the limiting screw 321 pass through the base fixing hole 121 correspondingly, and then install the limiting rod tightening nut 221 on the limiting screw 321 and tighten it downward to fix the cylindrical layered rock sample preparation device with different layer dip angles on the workbench 32, facilitating the stable drilling of the core drilling machine 3.

[0045] Optionally, the base fixing hole 121 is a strip-shaped hole and is arranged perpendicular to the adjusting plate 13. In the horizontal direction, the relative position between the workbench 32 and the core drill bit 31 is adjustable. Exemplarily, in the embodiment of the present invention, further, the workbench 32 is slidably connected to the chassis of the core drilling machine 3 in the horizontal direction and is controlled by a stepping rocker 33. The tester can adjust the position of the workbench 32 by turning the stepping rocker 33 to roughly adjust the position of the cylindrical layered rock sample preparation device with different layer dip angles. By setting the base fixing hole 121 as a strip-shaped hole, after the limit screw 321 passes through it, the position inside the hole can be adjusted along the length direction of the base fixing hole 121 to finely adjust the position of the cylindrical layered rock sample preparation device with different layer dip angles on the workbench 32, so as to ensure that the clamped rough rock block can be accurately moved below the core drill bit 31, further improving the sampling accuracy.

[0046] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the field to which the present invention belongs. The "first", "second" and similar terms used in the description and claims of the present patent application for the invention do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "an" do not denote a quantity limitation, but mean that there is at least one. The terms such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationships may also change accordingly.

[0047] The above are only optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A preparation device for a cylindrical layered rock sample with different layer inclination angles, characterized in that, Comprising: A fixed base (1) and a specimen holder (2), The fixed base (1) includes a chassis (11), fixed lugs (12) and two adjusting plates (13). The chassis (11) has a mounting surface (11a). The adjusting plates (13) protrude from the mounting surface (11a) and are perpendicularly connected to the chassis (11). The two adjusting plates (13) are arranged in parallel at intervals. The adjusting plates (13) are provided with arc-shaped angle-adjusting limiting holes (131). The fixed lugs (12) are connected to the chassis (11) and have base fixing holes (121) opened above; The specimen holder (2) includes a tray (21), an angle limiting rod (22) and two tightening seats (23). The tray (21) is rectangular and one end in the length direction is hinged to the chassis (11). A vertical bracket (24) is provided on the tray (21). The two tightening seats (23) are arranged oppositely at intervals and are connected to the vertical bracket (24). The distance between the two tightening seats (23) is adjustable. The other end of the tray (21) in the length direction is located between the two adjusting plates (13), and an angle limiting rod moving hole (211) is opened on the plate body. The angle limiting rod moving hole (211) is arranged along the length direction of the tray (21). The angle limiting rod (22) is slidably inserted into the angle limiting rod moving hole (211), and both ends are respectively slidably inserted into the angle-adjusting limiting holes (131) on the two adjusting plates (13). Limit rod tightening nuts (221) are installed at both ends of the angle limiting rod (22) protruding from the angle-adjusting limiting holes (131).

2. The preparation device for a cylindrical layered rock sample with different layer inclination angles according to claim 1, characterized in that, A plurality of limiting grooves (1311) are provided on the inner arc of the angle-adjusting limiting hole (131). The plurality of limiting grooves (1311) are evenly arranged at intervals.

3. A device for preparing a cylindrical laminated rock sample with different layer dip angles according to claim 2, characterized in that, The bottom of the limiting groove (1311) is arc-shaped.

4. A preparation device for a cylindrical layered rock sample with different layer inclination angles according to claim 1, characterized in that, The vertical bracket (24) includes a connecting plate (241) and two support plates (242). The connecting plate (241) is vertically arranged at one end of the tray (21) in the length direction. The two support plates (242) are perpendicularly connected to both ends of the connecting plate (241). The bottom of the tightening seat (23) is located on the tray (21). The two tightening seats (23) are arranged between the two support plates (242), and an adjusting screw (231) is movably connected to the opposite side. The adjusting screw (231) is rotatably and vertically inserted through the adjacent support plate (242). A tightening handle (232) is provided at one end of the adjusting screw (231) away from the tightening seat (23).

5. A preparation device for a cylindrical layered rock sample with different layer inclination angles according to claim 4, characterized in that, Longitudinal adjusting grooves (2421) are provided on the support plates (242). The longitudinal adjusting grooves (2421) are arranged in a direction perpendicular to the tray (21). The adjusting screw (231) is slidably inserted into the longitudinal adjusting grooves (2421).

6. The preparation device for a cylindrical layered rock specimen with different layer inclination angles according to claim 1, characterized in that, A tightening plate (233) is detachably connected to the opposite side of the two tightening seats (23). The tightening plate (233) is a rubber material part.

7. A preparation device for cylindrical layered rock specimens with different layer inclination angles according to claim 6, characterized in that, A plurality of arc-shaped limiting teeth (2331) are arranged on a surface of the pressing plate (233) facing away from the pressing seat (23).

8. A preparation device for a cylindrical layered rock sample with different layer inclination angles according to claim 1, characterized in that, There are two fixing ears (12), which are symmetrically arranged on both sides of the chassis (11).

9. A preparation system, comprising the device for preparing cylindrical layered rock specimens with different layer dip angles as described in any one of claims 1 to 8, characterized in that, It further includes a core drilling machine (3). The core drilling machine (3) includes a core drill bit (31) and a workbench (32) located below the core drill bit (31). A limiting screw rod (321) matching the base fixing hole (121) is vertically connected to the workbench (32), and a limiting rod tightening nut (221) is installed on the limiting screw rod (321).

10. The preparation system according to claim 9, characterized in that, The base fixing hole (121) is a strip-shaped hole and is arranged along a direction perpendicular to the adjusting plate (13). In the horizontal direction, the relative position between the workbench (32) and the core drill bit (31) is adjustable.

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