Complex jointed loess sample preparation device and method

Abstract

The invention provides a device and a method for preparing a complex jointed loess sample. The device comprises a fixed frame; the joint cutting module comprises a supporting arm and a hole forming assembly, the supporting arm is arranged on the fixing frame, the hole forming assembly is arranged at the top end of the supporting arm, and the hole forming assembly comprises a telescopic component, a stepping motor and a drilling tool; the joint positioning module is arranged on the fixing frame and comprises a positioning disc and a positioning box, a horizontal moving assembly is arranged between the positioning disc and the fixing frame, the positioning box is rotatably arranged on the positioning disc and comprises a positioning upper half box and a positioning lower half box which are detachably connected, and a sample placing groove is formed in the positioning box; cutting grooves for limiting a joint cutting track are symmetrically formed in the top side wall and the bottom side wall of the sample placing groove; and the driving module is arranged on the fixing frame and comprises a driving part, and the output end of the driving part is connected with the supporting arm and the positioning disc. According to the invention, the jointed loess sample with any angle and length can be accurately prepared.

Description

Technical Field

[0001] The invention relates to the technical field of structural loess joint sample preparation, and in particular to a device and method for preparing a complex-jointed loess sample. Background Art

[0002] In the field of geotechnical engineering, structural loess has a large number of complex joints with different angles and sizes, such as vertical joints, structural joints, unloading cracks, etc.; the spatial distribution scale, range, parallel spacing, staggered degree and intersection angle of these structural surfaces vary, cutting the slope to form a structure, which reduces the long-term stability of the loess slope; therefore, it is necessary to carry out strength and deformation characteristics testing of loess with complex joints to provide soil strength parameter basis for loess slope stability analysis. However, most of the existing joint sample preparation devices are for rock samples, which are difficult to apply to soil joint sample preparation; and the existing soil sample preparation equipment rarely involves joint preparation devices and technologies, and it is even more impossible to prepare loess samples containing the above-mentioned complex joints, which is not convenient for conducting mechanical property testing research on structural loess and cannot meet current testing needs.

[0003] Therefore, how to accurately prepare loess samples with joints of arbitrary angles and lengths to simulate the distribution of complex structural loess joint cracks, and thus meet the urgent needs of scientific research and engineering practice for strength testing of soil samples with complex joints is a technical problem that needs to be solved urgently. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a device and method for preparing a complex-jointed loess sample to eliminate or improve one or more defects existing in the prior art.

[0005] One aspect of the present invention provides a device for preparing a complex-jointed loess sample, the device comprising: Fixed frame; The joint cutting module comprises a support arm and a hole forming assembly, wherein the support arm is arranged on the fixing frame, the hole forming assembly is arranged on the top of the support arm, and the hole forming assembly comprises a telescopic component, a stepping motor and a drilling tool; A joint positioning module is arranged on the fixing frame, the joint positioning module comprises a positioning plate and a positioning box, a horizontal moving component is arranged between the positioning plate and the fixing frame, the positioning box is rotatably arranged on the positioning plate, the positioning box comprises a positioning upper half box and a positioning lower half box, the positioning upper half box and the positioning lower half box are detachably connected, a sample placement groove is provided inside the positioning box, cutting grooves for limiting the joint cutting trajectory are symmetrically arranged on the top side wall and the bottom side wall of the sample placement groove, and the cutting grooves are passed through along the thickness direction of the positioning box; A driving module is arranged on the fixing frame, and the driving module includes a driving component, an output end of which is connected to the support arm and the positioning plate, and the driving component is used to drive the joint cutting module to move up and down and to drive the joint positioning module to move horizontally.

[0006] In some embodiments of the present invention, the fixing frame comprises a bottom plate, a middle plate and a top plate, the bottom plate, the middle plate and the top plate are arranged in parallel and at intervals, the driving component is fixed to the bottom plate, the support arm is located on one side of the middle plate and the top plate, the joint positioning module is arranged on the middle plate, and the top plate and the middle plate are provided with corresponding through holes; The horizontal moving assembly is located between the positioning plate and the middle plate.

[0007] In some embodiments of the present invention, the support arm is C-shaped, and the two horizontal arms of the C-shaped support arm are respectively located at the top of the top plate and the bottom of the middle plate. A motion conversion component is provided between the vertical arm of the C-shaped support arm and the output end of the driving component, and the motion conversion component converts the rotational motion output by the driving component into up and down movement of the support arm.

[0008] In some embodiments of the present invention, the motion conversion component includes a circular rotating disk, a cylindrical yoke and a guide groove, the cylindrical yoke is fixed on the circular rotating disk, and the cylindrical yoke and the circular rotating disk are eccentrically arranged, the guide groove is transversely arranged on the vertical arm, the circular rotating disk is connected to the output end of the driving component, and the cylindrical yoke slides in the guide groove as the circular rotating disk rotates.

[0009] In some embodiments of the present invention, a mechanical transmission mechanism is provided between the circular rotating disk and the driving component; and / or, The horizontal moving component is a slide groove and slide rail mechanism, the slide rail of the slide groove and slide rail mechanism is fixed on the middle plate, and the slide groove of the slide groove and slide rail mechanism is arranged at the bottom of the positioning plate; and / or, An annular guide rail mechanism is provided between the positioning plate and the positioning box. The annular guide rail mechanism comprises an annular slide groove and an annular slide rail. The annular slide rail is arranged on the top of the positioning plate, and the annular slide groove is arranged on the bottom of the positioning box.

[0010] In some embodiments of the present invention, The middle plate is provided with horizontal scale lines; and / or, The positioning disk is provided with a rotation reference line; and / or, An angle scale is engraved on the outer side of the positioning lower half box.

[0011] In some embodiments of the present invention, the drilling tool includes a spiral drill rod, a conical drill bit and a diamond wire. The first end of the spiral drill rod is connected to the output end of the stepper motor. The spiral drill rod has a hollow structure. The diamond wire is located in the hollow structure, and the end of the diamond wire extends from the second end of the spiral drill rod to the outside. The second end of the spiral drill rod is detachably connected to the conical drill bit.

[0012] In some embodiments of the present invention, the positioning disk has a threaded guide hole, and the driving module includes a lead screw, which is connected to the output end of the mechanical transmission component, the circular rotating disk, and the threaded guide hole.

[0013] According to another aspect of the present invention, a method for preparing a complex-jointed loess sample is also provided, wherein the method uses the complex-jointed loess sample preparation device described in any of the above embodiments, and the method comprises: Step S10: Rotate and position the lower half box to achieve the positioning of the joint angle; Step S20: placing the loess sample into the sample placement slot of the positioning lower half box, fixing the positioning upper half box and the positioning lower half box together, and horizontally moving the joint positioning module to achieve positioning of the joint starting point of the sample; Step S30: Based on the telescopic component and the stepper motor, the drill tool is driven to drill vertically downward into the sample to achieve joint hole formation in the sample, and the conical drill bit of the drill tool is removed, the emery wire is fixed to the bottom end of the support arm, and the spiral drill rod of the drill tool is lifted to the top of the positioning box; Step S40: Based on the driving component, the joint cutting module is synchronously driven to move up and down and the joint positioning module is horizontally driven to achieve single joint cutting of the loess sample; Step S50: Remove the emery wire from the bottom end of the support arm, and re-tighten the emery wire into the hollow structure of the spiral drill rod through a conical drill bit.

[0014] In some embodiments of the present invention, the method further includes: adjusting the position of the joint positioning module to achieve repositioning of the joint starting point of the sample, and repeating steps S30 to S50 to achieve complex joint cutting of the loess sample.

[0015] The above-mentioned embodiment of the present invention discloses a device and method for preparing a complex jointed loess sample, wherein the preparation device includes a fixed frame, a joint cutting module, a joint positioning module and a driving module. The joint cutting module and the joint positioning module can move in the height direction and the horizontal direction respectively under the driving action of the driving component. That is, through the coordinated operation of the joint cutting module and the joint positioning module, a series of complex preparation processes such as precise positioning of prefabricated joints of the sample, stable hole forming and directional cutting can be completed. Not only can single-joint samples with arbitrary angles and arbitrary lengths be accurately produced, but also complex joint samples with multiple groups of cross joints can be efficiently prepared, and then the complex distribution form of natural structural loess joints can be simulated, thereby effectively meeting the urgent needs of the geotechnical engineering field for strength testing of loess samples with complex joints.

[0016] Additional advantages, purposes, and features of the present invention will be described in part in the following description, and will become apparent to those skilled in the art after studying the following, or may be learned from the practice of the present invention. The purposes and other advantages of the present invention may be achieved and obtained by the structures specifically indicated in the specification and the accompanying drawings.

[0017] Those skilled in the art will appreciate that the objectives and advantages that can be achieved with the present invention are not limited to the above specific description, and the above and other objectives that can be achieved by the present invention will be more clearly understood from the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of this application, and do not constitute a limitation of the present invention. The components in the drawings are not drawn to scale, but are only for illustrating the principles of the present invention. In order to facilitate the illustration and description of some parts of the present invention, the corresponding parts in the drawings may be enlarged, that is, they may become larger relative to other components in the exemplary device actually manufactured according to the present invention. In the drawings: Figure 1 The present invention is a schematic structural diagram of a device for preparing a complex-jointed loess sample according to an embodiment of the present invention.

[0019] Figure 2 It is a schematic structural diagram of a fixing frame of a preparation device according to an embodiment of the present invention.

[0020] Figure 3 It is a schematic structural diagram of a joint cutting module of a preparation device according to an embodiment of the present invention.

[0021] Figure 4 This is a local enlarged view of point A of the joint cutting module as shown in Figure 3.

[0022] Figure 5 It is a schematic diagram of the exploded structure of the joint positioning module of the preparation device according to one embodiment of the present invention.

[0023] Figure 6 The figure is a schematic diagram of the explosion structure of a device for preparing a loess sample with complex joints according to an embodiment of the present invention.

[0024] Reference numerals: Bottom plate 11 middle plate 12 top plate 13 support column 14 support arm 21 cutting upper arm 211 cutting lower arm 212 scotch yoke 213 circular rotating disk 2131 guide groove 2132 fixing bolt 214 hole forming assembly 22 telescopic component 221 stepper motor 222 drilling tool 223 conical drill bit 2231 spiral drill rod 2232 emery wire 2233 positioning plate 31 positioning lower half box 321 positioning upper half box 322 flat head rivet 323 pin 33 driving component 41 chain transmission mechanism 42 screw rod 43 DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0026] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0027] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, elements, steps or components, but does not exclude the presence or addition of one or more other features, elements, steps or components.

[0028] It should also be noted that, unless otherwise specified, the terms "install", "connect", "connect", "fix", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection with an intermediate. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0030] like Figure 1 and Figure 6 As shown, the complex jointed loess sample preparation device at least includes a fixing frame, a joint cutting module, a joint positioning module and a driving module.

[0031] The joint cutting module includes a support arm and a hole forming component 22, wherein the support arm is arranged on the fixed frame, and the hole forming component 22 is arranged at the top of the support arm, and the hole forming component 22 includes a telescopic component 221, a stepping motor 222 and a drilling tool 223. The joint positioning module is arranged on the fixed frame, and the joint positioning module includes a positioning disk 31 and a positioning box, and a horizontal moving component is arranged between the positioning disk 31 and the fixed frame, and the positioning box is rotatably arranged on the positioning disk 31, and the positioning box includes a positioning upper half box 322 and a positioning lower half box 321, and the positioning upper half box 322 and the positioning lower half box 321 are detachably connected, and the positioning box has a sample placement groove inside, and the top side wall and the bottom side wall of the sample placement groove are symmetrically provided with cutting grooves for limiting the joint cutting trajectory, and the cutting grooves pass through along the thickness direction of the positioning box. The driving module is arranged on the fixing frame, and the driving module comprises a driving component 41, the output end of the driving component 41 is connected with the supporting arm and the positioning plate 31, and the driving component 41 is used to drive the joint cutting module to move up and down and to drive the joint positioning module to move horizontally.

[0032] Exemplarily, the driving component can be specifically arranged at the bottom end of the fixed frame, the joint cutting module can be arranged on one side of the fixed frame, and the joint positioning module can be specifically arranged in the middle of the fixed frame. In the above embodiment, the joint positioning module and the joint cutting module are both arranged on the fixed frame, and the joint cutting module can move up and down along the fixed frame under the driving action of the driving component 41, and the joint positioning module can move horizontally along the fixed frame under the driving action of the driving component 41, and the positioning box can also rotate relative to the positioning plate 31, so that the angle of the loess sample can be set based on the joint positioning module, so that the preparation of joints of any angle and length can be completed.

[0033] Figure 2 FIG. 1 is a schematic diagram of a structure of a fixing frame of a preparation device according to an embodiment of the present invention. Figure 2 As shown, the fixed frame includes a bottom plate 11, a middle plate 12 and a top plate 13, and the bottom plate 11, the middle plate 12 and the top plate 13 are arranged in parallel and at intervals, the driving component 41 is fixed on the bottom plate 11, the support arm is located on one side of the middle plate 12 and the top plate 13, the joint positioning module is arranged on the middle plate 12, and corresponding through holes are provided on the top plate 13 and the middle plate 12; in addition, the horizontal moving component is specifically located between the positioning plate 31 and the middle plate 12.

[0034] refer to Figure 2, the bottom plate 11 can be a circular plate, and the top plate 13 and the middle plate 12 can also be circular plates with parts cut off. The diameters of the bottom plate 11, the middle plate 12 and the top plate 13 can be the same. In this case, the through holes on the top plate 13 and the middle plate 12 can specifically be circular holes, and the bottom plate 11, the middle plate 12 and the top plate 13 can all be steel plates. The bottom plate 11, the middle plate 12 and the top plate 13 are arranged at intervals, and exemplarily each of them can be connected by a support column 14. The driving component 41 can exemplarily be a driving motor, and in this case the driving motor is arranged on the bottom plate 11 in a detachable connection manner; in addition, the bottom plate 11 and the middle plate 12, and the middle plate 12 and the top plate 13 can be connected by four support columns 14 respectively, and the support columns 14 can specifically be steel cylinders; the support columns 14 can be connected to the top plate 13, the bottom plate 11 or the middle plate 12 by threaded buckles. Reference Figure 1 and Figure 6 Specifically, the support arm can be located on one side of the plane of the top plate 13 and the middle plate 12. At this time, corresponding positions of the top plate 13 and the middle plate 12 can be provided with guide holes, and the support arm is located in the guide hole, that is, the support arm can move up and down in the guide hole under the rotation of the driving component 41.

[0035] In some embodiments of the present invention, the support arm is C-shaped, and the two horizontal arms of the C-shaped support arm are respectively located at the top of the top plate 13 and the bottom of the middle plate 12, and a motion conversion component is provided between the vertical arm of the C-shaped support arm and the output end of the driving component 41, and the motion conversion component converts the rotational motion output by the driving component 41 into the up and down movement of the support arm. In this embodiment, the vertical arm of the support arm is connected to the output end of the driving component 41 through the motion conversion component, that is, the motion conversion component is used to convert the rotational motion output by the driving component 41 into the up and down movement of the support arm.

[0036] refer to Figure 3 The support arm can be specifically composed of a cutting upper arm 211, a cutting lower arm 212, a swivel yoke 213 and a fixing bolt 214. The cutting upper arm 211 is provided with a plurality of circular positioning holes for nesting with the cutting lower arm 212. In addition, the positioning holes at different positions of the cutting upper arm 211 can be locked by the fixing bolt 214, that is, the cutting lower arm 212 is locked in the corresponding circular positioning holes on the cutting upper arm 211 by the fixing bolt 214 to achieve the height positioning of the cutting arm. The swivel yoke 213 is provided on the cutting lower arm 212. The swivel yoke 213 is a waist-shaped structure as a whole. The waist-shaped structure has a waist-shaped hole in the center. The waist-shaped hole is used as a guide groove 2132 of the motion conversion component.

[0037] Furthermore, the motion conversion assembly includes a circular rotating disk 2131, a cylindrical yoke and a guide groove 2132. The cylindrical yoke is fixed on the circular rotating disk, and the cylindrical yoke is eccentrically arranged with the circular rotating disk 2131. The guide groove 2132 is transversely arranged on the vertical arm. The circular rotating disk 2131 is connected to the output end of the driving component 41. As the circular rotating disk 2131 rotates, the cylindrical yoke slides in the guide groove 2132. In this embodiment, the motion conversion assembly converts the rotational motion output by the driving component 41 into linear motion, so that the support arm can perform up and down reciprocating linear motion in the guide hole, thereby enabling the joint cutting module to achieve cutting of the loess sample in the vertical direction. In addition, the hole forming assembly 22 includes a telescopic component 221, a stepper motor 222 and a drilling tool 223. The telescopic component 221 can specifically be a hydraulic telescopic rod, refer to Figure 3 The hydraulic telescopic rod is connected to the top cross arm of the C-shaped support arm, that is, the hydraulic telescopic rod is fixed on the cutting upper arm 211, the cylinder rod end of the hydraulic telescopic rod is connected to the stepper motor 222, that is, the stepper motor 222 is fixed on the cylinder rod of the hydraulic telescopic rod, and the drilling tool 223 is connected to the output end of the stepper motor 222; in this embodiment, based on the telescopic movement of the cylinder rod of the hydraulic telescopic rod and the rotational movement of the output end of the stepper motor 222, the drilling tool 223 can complete the drilling action on the loess sample.

[0038] Furthermore, the drilling tool 223 includes a spiral drill rod 2232, a conical drill bit 2231 and an emery wire 2233. The first end of the spiral drill rod 2232 is connected to the output end of the stepper motor 222. The spiral drill rod 2232 has a hollow structure. The emery wire 2233 is located in the hollow structure, and the end of the emery wire 2233 extends from the second end of the spiral drill rod 2232 to the outside. The second end of the spiral drill rod 2232 is detachably connected to the conical drill bit 2231.

[0039] like Figure 4As shown, the conical drill bit 2231 is connected to the auger rod 2232, and a self-tightening threaded bayonet is provided at the top of the auger rod 2232. The emery wire 2233 is locked in the inner hollow of the auger rod 2232 by the self-tightening threaded bayonet and passes through the hollow part of the auger rod 2232. Optionally, the diameter of the auger rod 2232 is 2 mm, the aperture of the hollow hole of the auger rod 2232 is 0.3 mm, and the diameter of the emery wire 2233 can be 0.2 mm. In this embodiment, when the auger rod 2232 and the conical drill bit 2231 are connected and locked by the self-tightening threaded bayonet, the self-tightening threaded bayonet can lock the emery wire 2233 to the front of the auger rod 2232. In addition, the drilling tool 223 can prepare sample joints of any width by replacing emery wires 2233 of different diameters. It can be understood that the diameter of the auger rod 2232, the hole diameter and the diameter of the emery wire 2233 listed in this embodiment are all examples and can be set based on actual needs.

[0040] Figure 5 FIG. 1 is a schematic diagram of the exploded structure of a joint positioning module of a preparation device according to an embodiment of the present invention. Figure 5 As shown, the positioning upper half box 322 and the positioning lower half box 321 of the joint positioning module can be connected by a flat head rivet 323. The positioning disk 31 can be specifically a steel disk, and a horizontal moving component is provided between the steel disk and the middle plate 12 of the fixed frame. The horizontal moving component can be specifically a slide rail mechanism, and the slide rail of the slide rail mechanism is fixed on the middle plate 12, and the slide of the slide rail mechanism is arranged at the bottom of the positioning disk 31; specifically, the two slide rails are arranged in parallel on both sides of the through hole of the middle plate 12. The joint positioning module can move horizontally along the two slide rails under the rotation drive of the driving component 41. In order to realize the connection between the positioning disk 31 and the driving module, the positioning disk 31 has a threaded guide hole extending horizontally from the outer wall toward the inside, and the threaded guide hole is used to connect with the output end of the driving module, so as to convert the rotational motion output by the driving module into the linear motion of the joint positioning module based on the principle of the lead screw nut. The joint positioning module is used to realize the positioning of the loess sample, that is, a horizontal scale line is provided on the middle plate 12, and the horizontal scale line is set on one side of the guide rail for setting the cutting length of the prefabricated joint.

[0041] In order to make the positioning disk 31 rotatable relative to the positioning box, an annular guide rail mechanism is provided between the positioning disk 31 and the positioning box, and the annular guide rail mechanism includes an annular slide groove and an annular slide rail, the annular slide rail is arranged at the top of the positioning disk 31, and the annular slide groove is arranged at the bottom of the positioning box. In order to further facilitate the determination of the joint angle of the loess sample, a rotation reference line is also provided on the side of the positioning disk 31. In the above embodiment, the positioning upper half box 322 and the positioning lower half box 321 are both steel cylindrical structures, and are provided with symmetrical semi-cylindrical sample placement grooves inside. When the positioning upper half box 322 and the positioning lower half box 321 are in a connected state, the two semi-cylindrical sample placement grooves are combined into a cylindrical sample placement groove. In one embodiment, the size of the sample placement groove inside the positioning box can be set to: height 100mm, diameter 50mm. In this embodiment, the flat head rivet 323 between the positioning upper half box 322 and the positioning lower half box 321 can be removed to place the loess sample in the sample placement groove. The outer side of the positioning lower half box 321 is engraved with an angle scale with a range of 0-360°; when the positioning lower half box 321 is connected to the positioning plate 31, the angle scale on the positioning lower half box 321 pointed by the reference line on the positioning plate 31 is the preset joint angle. Figure 5 As shown, cutting grooves are symmetrically provided on the positioning lower half box 321 and the positioning upper half box 322. The diameter of the cutting grooves can be 1.5 mm. The cutting grooves are composed of a plurality of intersecting through line grooves, and the intersection of each line groove is the center point of the positioning box; the angle of each line groove represents the minimum interval of the sample joint angle that can be set, and the length of each line groove represents the maximum length of the sample joint that can be set; in some embodiments, the sample joint angle interval can be set to 15°, and the maximum joint length can be set to 6 cm; specifically, the cutting groove can guide the conical drill bit 2231 of the joint cutting module to vertically drill through the sample along the preset joint positioning starting point, and guide the emery wire 2233 of the drill 223 to horizontally cut the sample along the preset joint angle direction, so as to complete the cutting of joints at any angle.

[0042] In the above embodiment, the sample placement slot inside the positioning box is used to place the sample, the angle scale line outside the positioning lower half box 321 is used to prefabricate the angle setting of the joint, and the cutting grooves on the positioning upper half box 322 and the positioning lower half box 321 are used to guide the drill 223 through the sample and define the cutting trajectory to complete the joint cutting. In addition, in order to meet the joint cutting requirements of samples of different sizes, multiple positioning boxes can be set, and the size of the sample placement slot inside each positioning box can be different.

[0043] In some embodiments of the present invention, the driving module further includes a mechanical transmission mechanism, and in this case, a mechanical transmission mechanism is provided between the circular rotating disk 2131 and the driving component 41, and the mechanical transmission mechanism is also provided between the corresponding positioning disk 31 and the driving component 41. Exemplarily, the mechanical transmission mechanism can be a chain transmission mechanism 42, and the chain transmission mechanism 42 includes a driving sprocket, a driven sprocket and a chain, and the chain is vertically arranged; in addition, in order to convert the rotational motion of the driven sprocket into the linear motion of the positioning disk 31, the driving module further includes a screw 43 for cooperating with the threaded guide hole on the positioning disk 31. In this embodiment, the driving component 41 is a servo motor, which is mounted on the bottom plate 11 of the fixed frame. The servo motor drives the screw 43 to rotate through the chain transmission mechanism 42. Since one end of the screw 43 is connected to the threaded guide hole on the positioning plate 31 through a thread, based on the principle of the screw nut, the joint positioning module can reciprocate along the guide rail on the middle plate 12. In addition, the other end of the screw can be connected to the circular rotating disk 2131 of the motion conversion component through a fixed buckle, that is, the circular rotating disk 2131 rotates synchronously with the screw, thereby driving the joint cutting module to reciprocate up and down, thereby realizing the cutting of the sample joint by the joint cutting module. In one embodiment, the screw 43 rotates clockwise to push the joint positioning module to move linearly along the guide rail on the middle plate 12 in a direction away from the support arm.

[0044] Through the above embodiments, it can be found that the complex jointed loess sample preparation device disclosed in the present invention can accurately set any joint angle and length for the loess sample through the joint positioning module, and synchronously drive the joint positioning module and the joint cutting module to work together through the driving module, automatically and stably complete the vertical hole forming and horizontal cutting of the joints, and significantly improve the success rate and accuracy of the joint sample preparation. The device can meet the angle setting requirements of multiple groups of cross-joint preparations through the joint positioning module, without moving the sample and additional module tools. Only through the multiple collaborative operations of the joint cutting module and the joint positioning module, the preparation of multiple groups of cross-jointed complex joint samples can be achieved efficiently and quickly. The device can not only complete a series of complex preparation processes such as precise positioning of sample prefabricated joints, stable hole forming and directional cutting, but also the device is automatically integrated, stable and easy to operate, which greatly improves the preparation efficiency and finished product quality of complex joint samples.

[0045] Correspondingly, the present invention also provides a method for preparing a loess sample with complex joints, which adopts a preparation device as described in any of the above embodiments, and the method includes the following steps: Step S10: Rotate the positioning lower half box to achieve the positioning of the joint angle; Step S20: Place the loess sample into the sample placement slot of the positioning lower half box, fix the positioning upper half box and the positioning lower half box, and horizontally move the joint positioning module to achieve the positioning of the joint starting point of the sample; Step S30: Drive the drill tool vertically downward into the sample based on the telescopic component and the stepper motor to achieve the joint hole formation of the sample, and remove the conical drill bit of the drill tool and fix the emery wire to the bottom end of the support arm, and lift the spiral drill rod of the drill tool to the top of the positioning box; Step S40: Based on the driving component, synchronously drive the joint cutting module to move back and forth up and down and the joint positioning module to move horizontally to achieve single joint cutting of the loess sample; Step S50: Remove the emery wire from the bottom end of the support arm, and re-lock the emery wire into the hollow structure of the spiral drill rod through the conical drill bit.

[0046] Furthermore, in order to complete the preparation of complex joints for loess samples, the method for preparing loess samples with complex joints also includes the following steps: adjusting the position of the joint positioning module to reposition the starting point of the joints of the sample, and repeating steps S30 to S50 to achieve complex joint cutting for the loess sample.

[0047] Exemplarily, in the joint angle positioning step, the positioning disk of the joint positioning module can be first connected and fixed to the positioning lower half box through an annular guide rail, and the 0° angle scale line on the side of the positioning lower half box is aligned with the reference line of the positioning disk; secondly, the positioning lower half box is rotated along the annular guide rail so that the reference line of the positioning disk is aligned with a certain angle scale on the side wall of the positioning lower half box, and the positioning lower half box and the positioning disk are fixedly connected using a pin 33. At this time, the angle scale value of the positioning lower half box that is aligned with the reference line of the positioning disk is the preset sample joint angle.

[0048] In the step of positioning the starting point of the joint of the sample, the loess sample can be first placed in the sample placement groove of the positioning lower half box, and the positioning upper half box can be symmetrically fixed to the positioning lower half box by flat-head rivets; secondly, the joint positioning module is connected to the two-way guide rail on the middle plate of the fixed frame through the two-way guide groove at the bottom of the positioning plate, and the joint positioning module is slid through the guide rail and guide groove mechanism to be located at the center position of the middle plate of the fixed frame; finally, the joint positioning module is horizontally moved along the two-way guide rail on the middle plate so that the end position of the cutting groove on the positioning box is aligned with the center position of the middle plate, and the positioning of the starting point of the joint of the sample can be completed; the specific moving distance of the joint positioning module can be read through the horizontal scale line on the middle plate, that is, the horizontal scale line on the middle plate can determine the specific moving distance of the joint positioning module.

[0049] In the step of drilling holes in the joints of the sample, the height of the cutting upper arm of the joint cutting module can be adjusted first, so that the conical drill bit of the hole-forming component is close to the cutting groove on the top of the upper half box, and is locked with the cutting lower arm by fixing bolts; secondly, the drill tool is driven to rotate by a stepper motor, and the drill tool is driven to move vertically by a hydraulic telescopic rod, so that the spiral drill rod drives the conical drill bit to drill vertically downward from the end of the joint cutting groove into the sample, and after the conical drill bit drills through the sample and passes through the cutting groove at the bottom of the joint positioning module, the drilling work of the sample joint is completed; finally, the conical drill bit is unscrewed from the spiral drill rod, and after the self-tightening threaded bayonet is released, the emery wire is immediately pulled out from the center of the spiral drill rod and fixedly connected to the cutting lower arm, and the drill tool is pulled out from the joint positioning module and the sample by the coordinated work of the stepper motor and the hydraulic telescopic rod.

[0050] In the single joint cutting step of the sample, first start the servo motor of the driving module to rotate the sprocket, thereby driving the screw to rotate clockwise; the rotation of the screw drives the circular rotating disk of the joint cutting module to rotate, thereby driving the cylindrical yoke to produce horizontal movement relative to the guide groove, and then driving the arm of the joint cutting module to produce up and down reciprocating movement, thereby driving the emery wire fixed on the arm to cut the sample vertically along the cutting groove; at the same time, the screw rotates clockwise to drive the joint positioning module to move horizontally along the two-way guide rail on the middle plate away from the arm, thereby causing the sample to produce horizontal relative movement relative to the emery wire fixed in the vertical position, so as to realize the directional cutting of the sample by the emery wire along the cutting groove; the vertical movement of the joint cutting module and the horizontal movement of the joint positioning module cooperate to realize the precise directional cutting of the sample joints by the joint cutting module, and the horizontal movement distance of the joint positioning module driven by the screw in the driving module is the length of the prefabricated sample joint.

[0051] Furthermore, in the complex joint cutting step of the loess sample, first, after completing the trial production of a single joint with any joint angle and length, the joint cutting module and the joint positioning module are reset to the initial state and initial position before step S10. Then, the emery wire fixed at the bottom of the support arm is disassembled, and it is slowly pulled out from the sample and the joint positioning module. When the emery wire is retracted along the core of the spiral drill rod to the self-tightening screw bayonet position, it can be locked again by fixing the cone drill bit and the spiral drill rod; then, the servo motor drives the screw to rotate clockwise, and then drives the joint positioning module to move along the two-way guide rail on the middle plate to the center position of the middle plate; finally, the above steps S30 to S50 are repeated to prepare multiple groups of joints that intersect with the prepared single joints at any angle, thereby completing the preparation of complex joint samples.

[0052] To sum up, the complex jointed loess sample preparation device and method of the present application can accurately and efficiently prepare single joint samples with arbitrary joint angles and lengths and complex joint samples with multiple groups of arbitrary angle intersections, greatly improving the preparation efficiency and finished product quality of complex joint samples.

[0053] In the present invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with features of other embodiments or replace features of other embodiments.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the embodiments of the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for preparing a complex jointed loess sample, characterized in that: The device comprises: Fixed frame; The joint cutting module comprises a support arm and a hole forming assembly, wherein the support arm is arranged on the fixing frame, the hole forming assembly is arranged on the top of the support arm, and the hole forming assembly comprises a telescopic component, a stepping motor and a drilling tool; A joint positioning module is arranged on the fixing frame, the joint positioning module comprises a positioning plate and a positioning box, a horizontal moving component is arranged between the positioning plate and the fixing frame, the positioning box is rotatably arranged on the positioning plate, the positioning box comprises a positioning upper half box and a positioning lower half box, the positioning upper half box and the positioning lower half box are detachably connected, a sample placement groove is provided inside the positioning box, cutting grooves for limiting the joint cutting trajectory are symmetrically arranged on the top side wall and the bottom side wall of the sample placement groove, and the cutting grooves are passed through along the thickness direction of the positioning box; A driving module is arranged on the fixing frame, and the driving module includes a driving component, an output end of which is connected to the support arm and the positioning plate, and the driving component is used to drive the joint cutting module to move up and down and to drive the joint positioning module to move horizontally.

2. The complex jointed loess sample preparation device according to claim 1, characterized in that: The fixing frame comprises a bottom plate, a middle plate and a top plate, the bottom plate, the middle plate and the top plate are arranged in parallel and at intervals, the driving component is fixed on the bottom plate, the support arm is located on one side of the middle plate and the top plate, the joint positioning module is arranged on the middle plate, and the top plate and the middle plate are provided with corresponding through holes; The horizontal moving assembly is located between the positioning plate and the middle plate.

3. The complex jointed loess sample preparation device according to claim 2, characterized in that: The support arm is C-shaped, and the two horizontal arms of the C-shaped support arm are respectively located at the top of the top plate and the bottom of the middle plate. A motion conversion component is provided between the vertical arm of the C-shaped support arm and the output end of the driving component. The motion conversion component converts the rotational motion output by the driving component into up and down movement of the support arm.

4. The complex jointed loess sample preparation device according to claim 3, characterized in that: The motion conversion component includes a circular rotating disk, a cylindrical yoke and a guide groove. The cylindrical yoke is fixed on the circular rotating disk and is eccentrically arranged with respect to the circular rotating disk. The guide groove is transversely arranged on the vertical arm. The circular rotating disk is connected to the output end of the driving component. As the circular rotating disk rotates, the cylindrical yoke slides in the guide groove.

5. The complex jointed loess sample preparation device according to claim 4, characterized in that: A mechanical transmission mechanism is provided between the circular rotating disk and the driving component; and / or, The horizontal moving component is a slide groove and slide rail mechanism, the slide rail of the slide groove and slide rail mechanism is fixed on the middle plate, and the slide groove of the slide groove and slide rail mechanism is arranged at the bottom of the positioning plate; and / or, An annular guide rail mechanism is provided between the positioning plate and the positioning box. The annular guide rail mechanism comprises an annular slide groove and an annular slide rail. The annular slide rail is arranged on the top of the positioning plate, and the annular slide groove is arranged on the bottom of the positioning box.

6. The complex jointed loess sample preparation device according to claim 5, characterized in that: The middle plate is provided with horizontal scale lines; and / or, The positioning disk is provided with a rotation reference line; and / or, An angle scale is engraved on the outer side of the positioning lower half box.

7. The complex jointed loess sample preparation device according to claim 5, characterized in that: The drilling tool includes a spiral drill rod, a conical drill bit and a diamond wire. The first end of the spiral drill rod is connected to the output end of the stepper motor. The spiral drill rod has a hollow structure. The diamond wire is located in the hollow structure, and the end of the diamond wire extends from the second end of the spiral drill rod to the outside. The second end of the spiral drill rod is detachably connected to the conical drill bit.

8. The complex jointed loess sample preparation device according to claim 6, characterized in that: The positioning disk is provided with a threaded guide hole, and the driving module comprises a lead screw, which is connected to the output end of the mechanical transmission component, the circular rotating disk and the threaded guide hole.

9. A method for preparing a complex jointed loess sample, characterized in that: The method uses the complex jointed loess sample preparation device according to any one of claims 1 to 8, and the method comprises: Step S10: Rotate and position the lower half box to achieve the positioning of the joint angle; Step S20: placing the loess sample into the sample placement slot of the positioning lower half box, fixing the positioning upper half box and the positioning lower half box together, and horizontally moving the joint positioning module to achieve positioning of the joint starting point of the sample; Step S30: Based on the telescopic component and the stepper motor, the drill tool is driven to drill vertically downward into the sample to achieve joint hole formation in the sample, and the conical drill bit of the drill tool is removed, the emery wire is fixed to the bottom end of the support arm, and the spiral drill rod of the drill tool is lifted to the top of the positioning box; Step S40: Based on the driving component, the joint cutting module is synchronously driven to move up and down and the joint positioning module is horizontally driven to achieve single joint cutting of the loess sample; Step S50: Remove the emery wire from the bottom end of the support arm, and re-tighten the emery wire into the hollow structure of the spiral drill rod through a conical drill bit.

10. The method for preparing a complex-jointed loess sample according to claim 9, characterized in that: The method further includes: adjusting the position of the joint positioning module to achieve repositioning of the joint starting point of the sample, and repeatedly executing steps S30 to S50 to achieve complex joint cutting of the loess sample.

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