A test device for simulating dynamic destruction of formation rocks and its use method

Abstract

The present invention relates to the technical field of rock dynamic destruction test, specifically to a simulated stratum rock dynamic destruction test device and a method for using the same, comprising a device shell, the outer surface of the device shell is provided with a sample passing groove, the inner surface of the device shell is provided with a downward pressing groove, the bottom surface of the device shell is fixedly connected with a sample placement base, the top surface of the sample placement base is fixedly connected with a sample placement groove, the inner top surface of the device shell is provided with an intermittent driving mechanism, the inner top surface of the device shell is provided with a force storage downward pressing mechanism, the bottom surface of the force storage downward pressing mechanism is provided with a rotation conversion mechanism, the bottom surface of the rotation conversion mechanism is provided with a vibration conversion mechanism, the inner bottom surface of the device shell is provided with an alternating clamping mechanism, and the inner bottom surface of the device shell is provided with an intermittent toggle mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of rock dynamic destruction testing, in particular to a stratum rock dynamic destruction testing device and a use method thereof. Background Art

[0002] Rock dynamic failure test is an important experimental method used to evaluate the performance of rocks under dynamic loads. This test reveals the mechanical properties and failure mechanism of rocks by simulating the dynamic loads and failure processes that formation rocks are subjected to in actual environments.

[0003] Existing rock dynamic failure tests usually use the method of applying loads for testing.

[0004] The prior art (publication number: CN103411870A) discloses a test device for simulating dynamic destruction of formation rocks, which includes a test rock sample, a thick-walled steel cylinder, an upper piston, a lower piston, an upper cover plate and a lower cover plate; a thick-walled steel cylinder is sleeved outside the test rock sample; a dynamic load pressure hole for placing a dynamic load application tool is axially arranged at the center position of the upper piston and the test rock sample; a dynamic load measuring pressure gauge for measuring the dynamic load value of the central inner wall hole of the test rock sample is arranged at the lower cover plate. In the above-mentioned equipment, static or single-frequency loads are provided at the same time, but it is difficult to simulate dynamic changes in a real environment. Since the load changes received by the rock in a real formation environment are relatively complex, it may not be convenient to simulate the dynamic destruction effects of different frequencies, different loads and different positions on the rock in a complex environment.

[0005] In view of this, we propose a test device for simulating dynamic destruction of formation rocks and a method for using the same. Summary of the invention

[0006] The purpose of the present invention is to provide a simulated formation rock dynamic destruction test device and a method of using the same, so as to solve the problem that the simulated formation rock dynamic destruction test device proposed in the above background technology is difficult to simulate the dynamic changes in the real environment. To achieve the above purpose, the present invention provides the following technical solutions: a simulated formation rock dynamic destruction test device and a method of using the same, comprising a device housing, the outer surface of the device housing is provided with a sample passing groove, the inner surface of the device housing is provided with a downward pressing groove, the bottom surface of the device housing is fixedly connected with a sample placement base, the top surface of the sample placement base is fixedly connected with a sample placement groove, the inner top surface of the device housing is provided with an intermittent driving mechanism, the inner top surface of the device housing is provided with a force storage downward pressing mechanism, the bottom surface of the force storage downward pressing mechanism is provided with a rotation conversion mechanism, the bottom surface of the rotation conversion mechanism is provided with a vibration conversion mechanism, the inner bottom surface of the device housing is provided with an alternating clamping mechanism, and the inner bottom surface of the device housing is provided with an intermittent toggle mechanism;

[0007] The number of the sample passing slots is two, and the two sample passing slots are symmetrically distributed with the central axis of the device housing as the symmetry axis.

[0008] Preferably, the intermittent drive mechanism includes a drive motor, the drive motor is fixedly connected to the inner surface of the device housing, the output end of the drive motor is fixedly connected to a driving dial, the outer surface of the driving dial is meshed with a driven groove wheel, one end of the driven groove wheel is fixedly connected to a transmission main shaft, the outer surface of the transmission main shaft is fixedly connected to a driving pulley, and the outer surface of the driving pulley is sleeved with a transmission belt.

[0009] Preferably, the other end of the transmission main shaft is rotatably connected to the inner surface of the device housing, the number of the driving pulleys is four, and the four driving pulleys are equidistantly distributed on the outer surface of the transmission main shaft, and the transmission belt is respectively connected to the force storage downward pressure mechanism and the alternating clamping mechanism.

[0010] Preferably, the force storage pressing mechanism includes a pulley support frame, the pulley support frame is fixedly connected to the top surface of the device shell, the outer surface of the pulley support frame is rotatably connected to a driven pulley, the outer surface of the driven pulley is fixedly connected to an staggered rotating block, the inner surface of the staggered rotating block is slidably connected to a sliding connecting rod, one end of the sliding connecting rod is fixedly connected to the rotating connecting block, the outer surface of the sliding connecting rod is sleeved with a force storage spring, the outer surface of the rotating connecting block is rotatably connected to a transverse moving block, the inner surface of the transverse moving block is slidably connected to a transverse sliding limiting column, one end of the transverse sliding limiting column is fixedly connected to a longitudinal moving block, and the inner surface of the longitudinal moving block is slidably connected to a longitudinal fixed limiting column.

[0011] Preferably, the number of the pulley support frames is three, and the three pulley support frames are equidistantly distributed on the inner top surface of the device shell, the outer surface of the driven pulley is sleeved with a transmission belt, the installation angles between the staggered rotating blocks differ by one hundred and eighty degrees, the sliding connecting rod passes through the staggered rotating blocks, the two ends of the force storage spring are respectively abutted against the rotating connecting block and the staggered rotating block, and the longitudinal fixed limit column is fixedly connected to the inner top surface of the device shell.

[0012] Preferably, the rotation conversion mechanism includes a rotating shaft support frame, the rotating shaft support frame is fixedly connected to the longitudinal moving block, the inner surface of the rotating shaft support frame is fixedly connected with a continuously rotating shaft, the bottom surface of the continuously rotating shaft is rotatably connected with a longitudinal cylindrical cam, the outer surface of the longitudinal cylindrical cam is provided with a cylindrical cam groove, the bottom surface of the longitudinal cylindrical cam is fixedly connected with a connecting plug column, the bottom surface of the longitudinal fixed limit column is fixedly connected with a protrusion mounting frame, the inner surface of the protrusion mounting frame is fixedly connected with a contact protrusion, the bottom surface of the longitudinal cylindrical cam is installed with a bottom connecting column, the top surface of the bottom connecting column is fixedly connected with a load adjusting cylinder, the bottom surface of the bottom connecting column is fixedly connected with a bottom rotating disk, and the bottom surface of the bottom rotating disk is fixedly connected with a bottom follower rod.

[0013] Preferably, the radial dimension of the continuously rotating shaft is slightly smaller than the radial dimension of the longitudinal cylindrical cam, the longitudinal cylindrical cam passes through the protrusion mounting frame, the cylindrical cam groove is slidably connected to the contact protrusion, the other end of the connecting column passes through the inner surface of the bottom connecting column, and the output end of the load adjusting cylinder is fixedly connected to the bottom surface of the longitudinal cylindrical cam.

[0014] Preferably, the vibration conversion mechanism includes a rotating connecting platform, which is rotatably connected to the outer surface of the bottom connecting column, the inner surface of the rotating connecting platform is slidably connected to an anti-rotation column, the inner surface of the rotating connecting platform is slidably connected to a vertical moving rod, the outer surface of the vertical moving rod is sleeved with a vertical return spring, the bottom surface of the vertical moving rod is fixedly connected to a load trigger seat, and the top surface of the load trigger seat is fixedly connected to a transverse cylindrical cam.

[0015] Preferably, the anti-rotation column passes through the rotating connecting platform and the longitudinal fixed limit column, the top surface of the anti-rotation column is fixedly connected to the bottom surface of the longitudinal moving block, the vertical moving rod passes through the rotating connecting platform, the two ends of the vertical return spring are respectively against the vertical moving rod and the load trigger seat, and the transverse cylindrical cam is slidably connected to the bottom surface of the bottom follower rod.

[0016] Preferably, the alternating clamping mechanism includes an input pulley, which is rotatably connected to the inner surface of the device housing, the inner surface of the device housing is fixedly connected to a gear box housing, the inner surface of the gear box housing is rotatably connected to a driving gear, one end of the driving gear is fixedly connected to a driving half gear, the inner surface of the gear box housing is rotatably connected to a driven gear, one end of the driven gear is fixedly connected to a driven half gear, the inner surface of the gear box housing is rotatably connected to an output idler wheel, one end of the output idler wheel is fixedly connected to a rotating output shaft, both ends of the sample placement groove are fixedly connected to a clamp mounting plate, the outer surface of the clamp mounting plate is rotatably connected to a gear rod, one end of the gear rod is hingedly connected to a synchronous connecting rod, the other end of the synchronous connecting rod is hingedly connected to a clamp push-pull rod, the outer surface of the synchronous connecting rod is fixedly connected to a clamp connecting rod, one end of the gear rod is fixedly connected to a synchronous connecting shaft, and the outer surface of the clamp connecting rod is fixedly connected to a fixed clamp.

[0017] Preferably, a transmission belt is sleeved on the outer surface of the input pulley, the input pulley is fixedly connected to the driving gear, the driving gear is meshed with the driven gear, the driving half gear and the driven half gear are respectively meshed with the output idler gear on both sides, there are two gear rods on each clamp mounting plate, and the two gear rods are symmetrically distributed with the central axis of the clamp mounting plate as the symmetry axis, and the two gear rods are meshed with each other, there are two synchronous connecting shafts, and both ends of the two synchronous connecting shafts are fixedly connected to the gear rods.

[0018] Preferably, the intermittent toggle mechanism includes an internal mounting plate, the internal mounting plate is fixedly connected to the inner surface of the device housing, the inner surface of the internal mounting plate is rotatably connected to a one-way rotating shaft, the outer surface of the one-way rotating shaft is hingedly connected to a control pawl, one end of the one-way rotating shaft is fixedly connected to a friction disk, the other end of the one-way rotating shaft is rotatably connected to an outer driving wheel, a pawl groove is provided on the inner surface of the outer driving wheel, a pulling rope is fixedly connected to the outer surface of the outer driving wheel, one end of the outer driving wheel is fixedly connected to a rotation return spring, and the other end of the pulling rope is fixedly connected to a rope mounting plate.

[0019] Preferably, the pawl groove is engaged with the control pawl, the control pawl can only rotate in one direction, the other end of the rotation return spring is fixedly connected to the internal mounting plate, the number of the pulling ropes is two, and the two pulling ropes are respectively fixed on different sides of the outer driving wheel, the number of the rope mounting plates is two, and the two rope mounting plates are both fixedly connected to the fixed clamp.

[0020] A method for using a stratum rock dynamic destruction test device and a method for using the same, comprising the following steps:

[0021] S1. The rock sample to be tested enters the sample through the slot on the side where the intermittent toggle mechanism is not installed, is placed on the sample placement base, and is attached to the surface of the friction disk;

[0022] S2, start the driving motor of the intermittent driving mechanism, convert the uniform rotation into intermittent rotation through the intermittent toggle mechanism, the transmission main shaft drives the subsequent four active pulleys to rotate, respectively drive the force storage pressing mechanism and the alternating clamping mechanism, so that the force storage pressing mechanism and the alternating clamping mechanism work synchronously;

[0023] S3. The intermittent driving mechanism drives the force-storing pressing mechanism to intermittently move. The force-storing pressing mechanism uses the horizontal sliding limit column and the vertical fixed limit column to slide on the surface of the horizontal moving block and the vertical moving block, decomposing the circular rotation into displacement in the longitudinal and horizontal directions, and uses the force-storing spring to store force to make it contract when it is on the side and the top, and release it instantly when it rotates to the bottom, so that the longitudinal moving block has an acceleration effect when it falls in the longitudinal direction. The longitudinal moving block will drive the rotation conversion mechanism to move downward. The rotation conversion mechanism is installed by installing a longitudinal cylindrical cam on the longitudinal moving block and a longitudinal fixed limit The contact convex block installed on the position column forms a cylindrical cam structure, so that the longitudinal moving block rotates while driving the longitudinal cylindrical cam to descend, converting the downward movement into a simultaneous rotation descent, and utilizing the rotation to drive the vibration conversion mechanism at the bottom, utilizing the longitudinal cylindrical cam to continuously press down the transverse cylindrical cam while rotating, and the reset effect of the vertical reset spring to achieve high-frequency up and down vibration, achieving the effect of converting intermittent rotation into high-frequency vibration while descending, and simultaneously installing three sets of force-storing downward pressing mechanisms in an alternating manner to simulate the effect of dynamic destruction of rocks under different frequencies, different loads, and different positions in a complex environment;

[0024] S4. The intermittent driving mechanism drives the alternating clamping mechanism to move intermittently, and the input pulley drives the driving gear and the driven gear to rotate. At this time, the driving half gear and the driven half gear drive the output idler gear to rotate clockwise and counterclockwise respectively, and the intermittent rotation output by the intermittent driving mechanism is converted into intermittent reciprocating rotation. The driving gear rod drives the fixed clamping jaw to clamp and release intermittently, and works synchronously with the force storage pressing mechanism, that is, to achieve the effect of clamping when the force storage pressing mechanism presses down to apply a load, and releasing when the force storage pressing mechanism is retracted. In the process of opening and closing the fixed clamping jaw, the outer driving wheel is pulled by pulling the rope, and under the action of the pawl groove and the control pawl, the unidirectional rotating shaft and the friction disk can be rotated unidirectionally, and synchronized with the alternating clamping mechanism, the friction disk is used to rotate the rock sample when the fixed clamping jaw is released, thereby increasing the range of rock sample destruction test.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] In the present invention, the load applying part consisting of the force storage pressing mechanism, the rotation conversion mechanism, and the vibration conversion mechanism and the clamping and toggling part consisting of the alternating clamping mechanism and the intermittent toggling mechanism are simultaneously driven by the intermittent driving mechanism, so that the two parts are driven synchronously, achieving the effect of clamping when the load is applied and loosening when the load disappears.

[0027] In the present invention, the load applying part is composed of a force-storage pressing mechanism, a rotation conversion mechanism, and a vibration conversion mechanism. The force-storage pressing mechanism uses the intermittent rotation of the intermittent driving mechanism to realize the upward pressing effect of driving the rotation conversion mechanism and the vibration conversion mechanism, and uses the spring force storage to increase the pressing speed to provide the load size. In the process of pressing down and contacting the rock sample, the rotation conversion mechanism and the vibration conversion mechanism will convert the descending movement into the effect of generating vibration on the descending edge, and it is carried out alternately through the force-storage pressing mechanism. Due to the intermittent rotation, the vibration will stay for a period of time after contacting the rock sample, so as to simulate the effect of dynamic destruction of the rock under complex environment with different frequencies, different loads, and different positions.

[0028] In the present invention, the intermittent rotation output by the intermittent driving mechanism is converted into intermittent reciprocating rotation by the clamping and toggling part composed of the alternating clamping mechanism and the intermittent toggling mechanism, and the intermittent reciprocating rotation is used to drive the clamping jaw mechanism controlled by the gear, so that the clamping jaw is intermittently clamped and released, which is synchronized with the load applying part. The intermittent toggling mechanism uses a ratchet mechanism to realize the unidirectional rotation of the friction disk driven by the unidirectional rotating shaft, and is synchronized with the alternating clamping mechanism, so that the rock sample is released when the fixed clamping jaw of the alternating clamping mechanism is released, thereby increasing the range of rock sample destruction test. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic side view of the overall structure of the present invention;

[0030] Figure 2 It is a schematic cross-sectional view of the internal structure of the present invention;

[0031] Figure 3 It is a schematic diagram of the structure of the intermittent drive mechanism of the present invention cooperating with each other;

[0032] Figure 4 It is a schematic diagram of the structure in which the staggered rotating blocks, the sliding connecting rods, the transverse moving blocks, the transverse sliding limiting columns, the longitudinal fixed limiting columns and the longitudinal moving blocks cooperate with each other in the present invention;

[0033] Figure 5 It is a schematic diagram of the structure in which the staggered rotating blocks, the sliding connecting rods and the force storage spring cooperate with each other in the present invention;

[0034] Figure 6 It is a schematic diagram of the cooperation mechanism of the components of the rotation conversion mechanism of the present invention;

[0035] Figure 7 It is a schematic diagram of the structure of the rotation conversion mechanism and the vibration conversion mechanism cooperating with each other in the present invention;

[0036] Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle;

[0037] Fig. 9 It is a schematic diagram of the structure of the various components of the vibration conversion mechanism of the present invention cooperating with each other;

[0038] Fig.10 It is a schematic diagram of the structure of the intermittent driving mechanism and the alternating clamping mechanism cooperating with each other in the present invention;

[0039] Fig.11 It is a schematic diagram of the structure of the mutual cooperation of the components of the alternating clamping mechanism of the present invention;

[0040] Fig.12 It is a schematic diagram of the structure of the gearbox housing, the driving gear, the driving half gear, the driven gear, the driven half gear, and the output idler gear cooperating with each other in the present invention;

[0041] Fig.13 It is a schematic diagram of the structure in which the clamping jaw mounting plate, the gear rod, the synchronous connecting rod, the clamping jaw push-pull rod, the clamping jaw connecting rod and the synchronous connecting shaft cooperate with each other in the present invention;

[0042] Fig.14 It is a schematic diagram of the structure of the internal mounting plate and the friction disc cooperating with each other in the present invention;

[0043] Fig.15 It is a schematic diagram of the structure of the various components of the intermittent toggle mechanism of the present invention cooperating with each other;

[0044] Fig.16 For the present invention Fig.15 Enlarged view of point B in the middle.

[0045] In the figure: 1. device housing; 11. sample passage slot; 12. pressure passage slot; 2. sample placement base; 21. sample placement slot; 3. intermittent drive mechanism; 31. drive motor; 32. active dial; 33. driven groove wheel; 34. transmission main shaft; 35. active pulley; 36. transmission belt; 4. force storage and pressure mechanism; 41. pulley support frame; 42. driven pulley; 43. staggered rotating block; 44. sliding connecting rod; 441. rotating Connecting block; 442, force storage spring; 45, lateral moving block; 46, lateral sliding limit column; 461, longitudinal moving block; 47, longitudinal fixed limit column; 5, rotation conversion mechanism; 51, shaft support frame; 52, continuous rotation shaft; 53, longitudinal cylindrical cam; 531, cylindrical cam groove; 532, connecting plug column; 54, bump mounting frame; 541, contact bump; 56, bottom connecting column; 561, load adjustment cylinder; 57, bottom rotating disk ; 58, bottom driven rod; 6, vibration conversion mechanism; 61, rotating connection platform; 62, anti-rotation column; 63, vertical movement rod; 64, vertical return spring; 65, load trigger seat; 66, horizontal cylindrical cam; 7, alternating clamping mechanism; 71, input pulley; 72, gear box housing; 721, driving gear; 7211, driving half gear; 722, driven gear; 7221, driven half gear; 723, output idler; 73, rotating output Output shaft; 74, jaw mounting plate; 741, gear rod; 742, synchronous connecting rod; 743, jaw push-pull rod; 744, jaw connecting rod; 745, synchronous connecting shaft; 75, fixed jaw; 8, intermittent toggle mechanism; 81, internal mounting plate; 82, one-way rotating shaft; 821, control ratchet; 83, friction disk; 84, external driving wheel; 841, ratchet groove; 842, pulling rope; 843, rotating reset spring; 844, rope mounting plate. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical staff in this field without creative work are within the scope of protection of the present invention.

[0047] See also Figures 1 to 16The present invention provides a technical solution: a simulated formation rock dynamic destruction test device and a method of using the same, comprising a device shell 1, a sample passing groove 11 is provided on the outer surface of the device shell 1, a downward pressing groove 12 is provided on the inner surface of the device shell 1, a sample placement base 2 is fixedly connected to the bottom surface of the device shell 1, a sample placement groove 21 is fixedly connected to the top surface of the sample placement base 2, an intermittent driving mechanism 3 is provided on the inner top surface of the device shell 1, a force storage downward pressing mechanism 4 is provided on the inner top surface of the device shell 1, a rotation conversion mechanism 5 is provided on the bottom surface of the force storage downward pressing mechanism 4, a vibration conversion mechanism 6 is provided on the bottom surface of the rotation conversion mechanism 5, an alternating clamping mechanism 7 is provided on the inner bottom surface of the device shell 1, and the device shell 1 is provided with an intermittent toggle mechanism 8 on the inner bottom surface, and the device housing 1 is used to install and protect the internal structure. The rock sample to be tested enters through the groove 11 from the sample on the side where the intermittent toggle mechanism 8 is not installed, is placed on the sample placement base 2, and is attached to the surface of the friction disk 83 on the intermittent toggle mechanism 8. The clamping is achieved by the alternating clamping mechanisms 7 at both ends. The intermittent driving mechanism 3 realizes intermittent rotation through the groove wheel to drive the force storage pressing mechanism 4 to intermittently press down to achieve the effect of staying at the bottom. The alternating clamping and releasing are achieved by driving the alternating clamping mechanism 7. When the force storage pressing mechanism 4 is pressed down, the sample is clamped to prevent deflection when the load is applied, and is released after the force storage pressing mechanism 4 is retracted. The intermittent toggle mechanism 8 is used to toggle the experimental sample for a certain distance to achieve a larger test range.

[0048] The number of the sample passage slots 11 is two, and the two sample passage slots 11 are symmetrically distributed with the central axis of the device housing 1 as the symmetry axis.

[0049] The intermittent drive mechanism 3 includes a drive motor 31, which is fixedly connected to the inner surface of the device housing 1. The output end of the drive motor 31 is fixedly connected to a driving dial 32, and the outer surface of the driving dial 32 is meshed with a driven groove wheel 33. One end of the driven groove wheel 33 is fixedly connected to a transmission main shaft 34, and the outer surface of the transmission main shaft 34 is fixedly connected to a driving pulley 35. The outer surface of the driving pulley 35 is sleeved with a transmission belt 36. During use, the drive motor 31 drives the driving dial 32 to rotate, and the two ends of the transmission main shaft 34 are respectively fixed with the driven groove wheel 33. The driving dial 32 is fixedly connected and rotatably connected with the inner wall of the device housing 1. The engagement of the driving dial 32 with the driven groove wheel 33 can drive it to rotate, and convert the uniform rotation of the driving dial 32 into intermittent rotation of the driven groove wheel 33 and the subsequent transmission main shaft 34. A plurality of driving pulleys 35 are installed on the transmission main shaft 34. The first three are connected with three force storage pressing mechanisms 4 through transmission belts 36 to realize intermittent drive, and the last one is also connected with the alternating clamping mechanism 7 through the transmission belt 36 to realize intermittent drive, realizing intermittent drive, and the force storage pressing mechanism 4 and the alternating clamping mechanism 7 are simultaneously operated.

[0050] The other end of the transmission main shaft 34 is rotatably connected to the inner surface of the device housing 1. There are four driving pulleys 35, and the four driving pulleys 35 are equidistantly distributed on the outer surface of the transmission main shaft 34. The transmission main shaft 34 is fixed at an installation height by being rotatably connected to the device housing 1. Multiple driving pulleys 35 drive different mechanisms to achieve intermittent driving of the force storage pressing mechanism 4 and the alternating clamping mechanism 7.

[0051] The force storage pressing mechanism 4 includes a pulley support frame 41, which is fixedly connected to the top surface of the device housing 1, and the outer surface of the pulley support frame 41 is rotatably connected to a driven pulley 42, and the outer surface of the driven pulley 42 is fixedly connected to an interlaced rotating block 43, and the inner surface of the interlaced rotating block 43 is slidably connected to a sliding connecting rod 44, and one end of the sliding connecting rod 44 is fixedly connected to a rotating connecting block 441, and the outer surface of the sliding connecting rod 44 is sleeved with a force storage spring 442, and the outer surface of the rotating connecting block 441 is rotatably connected to a transverse moving block 45, and the inner surface of the transverse moving block 45 is slidably connected to a transverse sliding limiting column 46, and one end of the transverse sliding limiting column 46 is fixedly connected to a longitudinal moving block 461 The inner surface of the longitudinal moving block 461 is slidably connected with a longitudinal fixed limiting column 47. During use, three driven pulleys 42 are installed on the three pulley support frames 41. The intermittent driving mechanism 3 drives the three driven pulleys 42 to rotate through the belts at the same time, and transmits the rotation to the staggered rotating block 43. The installation angles between the staggered rotating blocks 43 differ by 180 degrees, that is, the staggered rotating blocks 43 on both sides move the same, and the movement in the middle is opposite to that on both sides, so as to achieve the effect of alternating work of the three force storage pressing mechanisms 4. During the rotation of the staggered rotating block 43, the sliding connecting rod 44 on its surface will be driven to rotate. One end of the sliding connecting rod 44 is connected to the lateral moving block 45 through the rotating connecting block 441. The lateral moving block 45 can slide in the lateral direction. The movable limit column 46 can realize lateral sliding on the movable limit column 46, and the lateral sliding limit column 46 can slide longitudinally on the longitudinal fixed limit column 47 through the longitudinal moving block 461. The combination of lateral and longitudinal movement allows the lateral moving block 45 to reach any position on the plane formed by the lateral sliding limit column 46 and the longitudinal fixed limit column 47. Therefore, the sliding connecting rod 44 can drive the lateral moving block 45 to rotate, and pull the lateral sliding limit column 46 and the longitudinal moving block 461 to move longitudinally. A storage spring 442 is installed between the rotating connecting block 441 and the staggered rotating block 43. Since the size of the lateral sliding limit column 46 and the size of the longitudinal fixed limit column 47 on the staggered rotating block 43 are shorter, when the rotating connecting block 441 follows the staggered rotating block 43, the rotation of the connecting block 441 is very fast. When the rotating block 43 rotates to the sides and the top position, the force storage spring 442 does not have enough space to stretch out. Until the rotating connecting block 441 rotates to the bottom with the staggered rotating block 43, since the longitudinal fixed limit column 47 is longer under the staggered rotating block 43, the force storage spring 442 is instantly released and quickly pushes the lateral moving block 45 and the lateral sliding limit column 46 and the longitudinal moving block 461 connected thereto to the bottom, achieving the effect of driving the longitudinal moving block 461 to fall rapidly through the spring force storage, and the staggered rotating blocks 43 are installed at different angles to achieve alternating falls. Since the power source is intermittent, the load test part will stay on the sample for a period of time, and the bottom rock sample will be subjected to a destructive test of the dynamic load applied.

[0052] There are three pulley support frames 41, and the three pulley support frames 41 are equidistantly distributed on the inner top surface of the device housing 1. The outer surface of the driven pulley 42 is sleeved with a transmission belt 36. The installation angles of the staggered rotating blocks 43 differ by 180 degrees. The sliding connecting rod 44 runs through the staggered rotating block 43. The two ends of the storage spring 442 are respectively against the rotating connecting block 441 and the staggered rotating block 43. The longitudinal fixed limiting column 47 is fixedly connected to the inner top surface of the device housing 1. The pulley support frame 41 is installed with three groups of driven pulleys 42 and staggered rotating blocks 43. The staggered rotating blocks 43 with different installation angles can realize grouped staggered operation. Through belt transmission, the staggered rotating block 43 and the transmission main shaft 34 are separated by a sufficiently long interval to accommodate the rotation of the sliding connecting rod 44 driven by the staggered rotating block 43. The storage spring 442 is limited and compressed by the lateral sliding limiting column 46 and the longitudinal fixed limiting column 47 on both sides and the top, and is released at the bottom to achieve rapid falling.

[0053] The rotation conversion mechanism 5 includes a rotating shaft support frame 51, the rotating shaft support frame 51 is fixedly connected to the longitudinal moving block 461, the inner surface of the rotating shaft support frame 51 is fixedly connected to a continuously rotating shaft 52, the bottom surface of the continuously rotating shaft 52 is rotatably connected to a longitudinal cylindrical cam 53, the outer surface of the longitudinal cylindrical cam 53 is provided with a cylindrical cam groove 531, the bottom surface of the longitudinal cylindrical cam 53 is fixedly connected to a connecting plug column 532, the bottom surface of the longitudinal fixed limiting column 47 is fixedly connected to a protrusion mounting frame 54, the inner surface of the protrusion mounting frame 54 is fixedly connected to a contact protrusion 541, and the bottom surface of the longitudinal cylindrical cam 53 is fixedly connected to a contact protrusion 541. A bottom connecting column 56 is installed, and a load regulating cylinder 561 is fixedly connected to the top surface of the bottom connecting column 56, and a bottom rotating disk 57 is fixedly connected to the bottom surface of the bottom rotating disk 57. A bottom follower rod 58 is fixedly connected to the bottom surface of the bottom rotating disk 57. Through the setting of the rotation conversion mechanism 5, during use, the shaft support frame 51 is installed on the longitudinal moving block 461 and follows its longitudinal movement, driving the continuous rotating shaft 52 and the longitudinal cylindrical cam 53 in the shaft support frame 51 to achieve longitudinal movement. The convex block mounting frame 54 is fixed on the longitudinal fixed limiting column 47. Since the longitudinal fixed limiting column 47 is fixed to the device housing 1 The height position of the protrusion mounting frame 54 and the contact protrusion 541 inside it remains unchanged. When the shaft support frame 51 descends, the longitudinal cylindrical cam 53 first descends in the protrusion mounting frame 54 and cooperates with the contact protrusion 541 through the cylindrical cam groove 531 to convert the linear motion into rotation. Due to the acceleration effect of the downward pressure mechanism 4, the speed is faster until the shaft support frame 51 continues to descend so that the continuously rotating shaft 52 is in the protrusion mounting frame 54. Since the radial dimension of the continuously rotating shaft 52 is slightly smaller, it does not contact the contact protrusion 541 and there is no cam groove on the surface, the continuously rotating shaft 52 will not rotate, but it will be in contact with its bottom The rotatably connected longitudinal cylindrical cam 53 will continue to rotate for a period of time due to inertia, thereby converting the longitudinal movement of the force-storing downward pressing mechanism 4 into the longitudinal cylindrical cam 53 and the bottom rotating disk 57 fixedly connected thereto, which descends and rotates at the same time, and drives the bottom vibration conversion mechanism 6 to descend and contact the surface of the rock sample. The longitudinal cylindrical cam 53 is connected to the bottom connecting column 56 through the load adjusting cylinder 561, and the connecting plug column 532 acts as a latch to increase the stability of the connection. The overall length is changed by changing the gap size through the load adjusting cylinder 561, so as to achieve destructive testing by applying an adjustable dynamic load to the rock sample.

[0054] The radial dimension of the continuously rotating shaft 52 is slightly smaller than the radial dimension of the longitudinal cylindrical cam 53. The longitudinal cylindrical cam 53 passes through the protrusion mounting frame 54. The cylindrical cam groove 531 is slidably connected with the contact protrusion 541. The other end of the connecting column 532 passes through the inner surface of the bottom connecting column 56. The output end of the load adjusting cylinder 561 is fixedly connected to the bottom surface of the longitudinal cylindrical cam 53. Since the radial dimension of the continuously rotating shaft 52 is slightly smaller, it does not contact the contact protrusion 541 and there is no cam groove on the surface, and the continuously rotating shaft 52 will not rotate.

[0055] The vibration conversion mechanism 6 includes a rotating connecting platform 61, which is rotatably connected to the outer surface of the bottom connecting column 56, and the inner surface of the rotating connecting platform 61 is slidably connected to an anti-rotation column 62. The inner surface of the rotating connecting platform 61 is slidably connected to a vertical moving rod 63, and the outer surface of the vertical moving rod 63 is sleeved with a vertical return spring 64. The bottom surface of the vertical moving rod 63 is fixedly connected to a load trigger seat 65, and the top surface of the load trigger seat 65 is fixedly connected to a transverse cylindrical cam 66. Through the setting of the vibration conversion mechanism 6, during use, the rotating connecting platform 61 follows the bottom connecting column 56 to achieve lifting and lowering. Since they are rotatably connected and one side is limited by an anti-rotation column 62, the anti-rotation column 62 is installed at the bottom of the longitudinal moving block 461 and passes through the rotating connecting platform 61 so that it does not affect the lifting and lowering of the rotating connecting platform 61. In this way, the rotating connecting platform 61 will not rotate when following the lifting and lowering of the bottom connecting column 56, and the rotating connecting platform 61 is connected to the load trigger seat 65 through the vertical moving rod 63 The trigger seat 65 and the vertical moving rod 63 can move up and down on the rotating connecting platform 61 and drive the load trigger seat 65 to move up and down. A vertical return spring 64 is set on the vertical moving rod 63 to counteract gravity and keep it in an upward state. The bottom connecting column 56 will also drive the bottom rotating disk 57 and the bottom bottom driven rod 58 to rotate during the downward rotation. The bottom driven rod 58 and the transverse cylindrical cam 66 on the load trigger seat 65 form a cam structure. When the bottom driven rod 58 contacts the higher part of the transverse cylindrical cam 66, it will push it down. After separation, the transverse cylindrical cam 66 will be affected by the vertical return spring 64 and reset upward, realizing the conversion of the lifting and rotating motion of the rotation conversion mechanism 5 into the reciprocating vibration motion of the vibration conversion mechanism 6. The vibration frequency of the load trigger seat 65 is determined by the bottom driven rod 58 and the transverse cylindrical cam 66. The more fluctuations on the circumference of the transverse cylindrical cam 66, the faster the vibration frequency. In this way, different vibrations can be simulated when it contacts the rock sample.

[0056] The anti-rotation column 62 passes through the rotating connecting platform 61 and the longitudinal fixed limit column 47. The top surface of the anti-rotation column 62 is fixedly connected to the bottom surface of the longitudinal moving block 461. The vertical moving rod 63 passes through the rotating connecting platform 61. The two ends of the vertical return spring 64 are respectively against the vertical moving rod 63 and the load trigger seat 65. The transverse cylindrical cam 66 is slidably connected to the bottom surface of the bottom follower rod 58. The anti-rotation column 62 allows the rotating connecting platform 61 to move up and down on its surface and prevents it from rotating with the bottom connecting column 56. The vertical moving rod 63 can move up and down on the rotating connecting platform 61 and drive the load trigger seat 65 to move up and down. A vertical return spring 64 is mounted on the vertical moving rod 63 to counteract gravity and maintain an upward state. The bottom follower rod 58 and the transverse cylindrical cam 66 on the load trigger seat 65 form a cam structure, which cooperates with the vertical return spring 64 to realize the movement process of not short-top down and rising.

[0057] The alternating clamping mechanism 7 includes an input pulley 71, which is rotatably connected to the inner surface of the device housing 1, a gear box housing 72 is fixedly connected to the inner surface of the device housing 1, a driving gear 721 is rotatably connected to the inner surface of the gear box housing 72, one end of the driving gear 721 is fixedly connected to a driving half gear 7211, a driven gear 722 is rotatably connected to the inner surface of the gear box housing 72, one end of the driven gear 722 is fixedly connected to a driven half gear 7221, an output idler wheel 723 is rotatably connected to the inner surface of the gear box housing 72, one end of the output idler wheel 723 is fixedly connected to a rotating output shaft 73, and clamps are fixedly connected to both ends of the sample placement groove 21. The outer surface of the mounting plate 74, the clamping claw mounting plate 74 is rotatably connected to a gear rod 741, one end of the gear rod 741 is hingedly connected to a synchronous connecting rod 742, and the other end of the synchronous connecting rod 742 is hingedly connected to a clamping claw push-pull rod 743, the outer surface of the synchronous connecting rod 742 is fixedly connected to a clamping claw connecting rod 744, one end of the gear rod 741 is fixedly connected to a synchronous connecting shaft 745, and the outer surface of the clamping claw connecting rod 744 is fixedly connected to a fixed clamping claw 75. Through the setting of the alternating clamping mechanism 7, during use, the input pulley 71 receives the intermittent power transmitted by the intermittent driving mechanism 3 and is synchronized with the force storage pressing mechanism 4. The gear box housing 72 is used to install and protect the internal gear The input pulley 71 first drives the driving gear 721 and the driving half gear 7211 on its surface to rotate, and the driving gear 721 and the driven gear 722 are meshed and rotated in opposite directions, so the driving half gear 7211 and the driven half gear 7221 rotate in opposite directions, and the driving half gear 7211 and the driven half gear 7221 are both meshed with the output idler gear 723. However, since only half of the meshing is in a state, the driving half gear 7211 and the driven half gear 7221 respectively drive the output idler gear 723 to rotate half a circle, thereby converting the intermittent rotation of the intermittent drive mechanism 3 into intermittent reciprocating rotation, and the output idler gear 723 transmits the intermittent reciprocating rotation to the output of the clamp mounting plate 74 by rotating the output shaft 73. The gear rods 741 are symmetrically distributed and mesh with each other. When one of the gear rods 741 rotates, it will drive the gear rod 741 on the other side to reverse, and form a parallel crank structure with the synchronous connecting rod 742 and the clamping claw push-pull rod 743. When the gear rod 741 reciprocates, it will drive the synchronous connecting rod 742 to move reciprocatingly and laterally. The synchronous connecting rod 742 drives the fixed clamping claws 75 on both sides to move reciprocatingly and laterally through the clamping claw connecting rod 744 fixedly connected to it on the outside. The synchronous connecting shaft 745 connects the gear rods 741 at both ends to make the clamping claws on both sides work synchronously. The switching action of the fixed clamping claw 75 is synchronized with the force storage pressing mechanism 4, so as to achieve the effect of clamping when the load is applied and releasing when the load is retracted.

[0058] The outer surface of the input pulley 71 is sleeved with a transmission belt 36, the input pulley 71 is fixedly connected to the driving gear 721, the driving gear 721 is meshed with the driven gear 722, the driving half gear 7211 and the driven half gear 7221 are respectively meshed with the output idler gear 723 on both sides, the number of gear rods 741 on each clamp mounting plate 74 is two, and the two gear rods 741 are symmetrically distributed with the central axis of the clamp mounting plate 74 as the symmetry axis, and the two gear rods 741 are meshed with each other, the number of synchronous connecting shafts 745 is two, and both ends of the two synchronous connecting shafts 745 are fixedly connected to the gear rods 741, the input pulley 71 receives the intermittent power transmitted by the intermittent driving mechanism 3, and is synchronized with the force storage pressing mechanism 4, the gear box housing 72 is used to install and protect each gear so that it is meshed internally and can rotate, and the two pairs of gear rods 741 on both sides simultaneously control the two pairs of fixed clamps 75 to achieve synchronous clamping and loosening.

[0059] The intermittent toggle mechanism 8 includes an internal mounting plate 81, which is fixedly connected to the inner surface of the device housing 1, the inner surface of the internal mounting plate 81 is rotatably connected to a one-way rotating shaft 82, the outer surface of the one-way rotating shaft 82 is hingedly connected to a control pawl 821, one end of the one-way rotating shaft 82 is fixedly connected to a friction disk 83, the other end of the one-way rotating shaft 82 is rotatably connected to an outer driving wheel 84, the inner surface of the outer driving wheel 84 is provided with a pawl groove 841, the outer surface of the outer driving wheel 84 is fixedly connected to a pulling rope 842, one end of the outer driving wheel 84 is fixedly connected to a rotation return spring 843, and the other end of the pulling rope 842 is fixedly connected to a rope mounting plate 844. Through the setting of the intermittent toggle mechanism 8, during use, the internal mounting plate 81 is used to install the one-way rotating shaft 82 on the friction disk 83. When the alternating clamping mechanism 7 drives the fixed clamping claw 75 to open, the pulling rope 842 is wound around the surface of the outer driving wheel 84, and the fixed clamping claw 75 is connected to the rope mounting plate The outer drive wheel 84 rotates and twists the return spring 843 when the pawl groove 841 in the outer drive wheel 84 is in hook groove part and meshes with the control pawl 821 on the one-way shaft 82 when the pawl groove 841 rotates, and the rotation of the control pawl 821 is blocked and cannot rotate. The outer drive wheel 84 can drive the one-way shaft 82 to rotate through the ratchet structure, and drive the friction disk 83 to rotate. The friction disk 83 contacts the placed rock sample and drives the rock sample. When the fixed jaws 75 are merged, the return spring 843 rotates and resets the return rope 842 to wrap around its surface again. At this time, the outer drive wheel 84 reverses, and the arc-shaped part of the pawl groove 841 contacts the control pawl 821. At this time, the reverse rotation of the control pawl 821 is not blocked, then the outer drive wheel 84 will not drive the one-way shaft 82 and the rock sample to rotate, so that the rock sample can be rotated when the fixed jaws 75 of the alternating clamping mechanism 7 are released, thereby increasing the range of rock sample destruction test.

[0060] The pawl groove 841 is engaged with the control pawl 821, and the control pawl 821 can only rotate in one direction. The other end of the rotation reset spring 843 is fixedly connected to the internal mounting plate 81. There are two pulling ropes 842, and the two pulling ropes 842 are respectively fixed on different sides of the outer drive wheel 84. There are two rope mounting plates 844, and the two rope mounting plates 844 are both fixedly connected to the fixed clamp 75. The one-way rotation of the one-way rotating shaft 82 and the friction disk 83 is realized through the groove wheel structure, so that the rock sample can only rotate in one direction. The pulling ropes 842 are respectively installed on different sides of the outer drive wheel 84 and wound around. When the pulling ropes 842 are pulled at the same time, two equal, parallel and opposite lateral forces are generated to form a force couple, which drives the outer drive wheel 84 to rotate. After the force disappears, it is reset by the rotation reset spring 843.

[0061] In this embodiment, Figure 1 , Figure 2 As shown, the device housing 1 is used to install and protect the internal structure. The rock sample to be tested enters through the sample groove 11 from the side where the intermittent toggle mechanism 8 is not installed. The two ends of the transmission main shaft 34 are respectively fixedly connected to the driven groove wheel 33 and rotatably connected to the inner wall of the device housing 1. The pulley support frame 41 is fixedly connected to the top surface of the device housing 1. The inner surface of the device housing 1 is fixedly connected to the gear box housing 72. The internal mounting plate 81 is fixedly connected to the inner side surface of the device housing 1. The two ends of the sample placement groove 21 are fixedly connected to the clamping claw mounting plates 74.

[0062] In this embodiment, Figure 3 As shown, a plurality of driving pulleys 35 are installed on the transmission main shaft 34, which respectively perform the effect of intermittently triggering the force storage pressing mechanism 4 and the alternating clamping mechanism 7 at the same time;

[0063] In this embodiment, Figure 4 As shown, the force-storing pressing mechanism 4 uses the cross-placed transverse sliding limit columns 46 and the longitudinal fixed limit columns 47, and utilizes the transverse moving block 45 and the longitudinal moving block 461 to slide on the surface thereof, thereby decomposing the circular rotation into displacements in the longitudinal and transverse directions;

[0064] In this embodiment, Figure 5 As shown, the staggered rotating blocks 43 with different installation angles realize group staggered work, and respectively show the different states of the force storage spring 442 at the top, bottom and side. When the rotating connecting block 441 rotates to the two sides and the top position following the staggered rotating block 43, the force storage spring 442 does not have enough space to stretch out;

[0065] In this embodiment, Figure 6As shown, the rotation conversion mechanism 5 forms a cylindrical cam structure by installing a longitudinal cylindrical cam 53 on the longitudinal moving block 461 and a contact protrusion 541 installed on the longitudinal fixed limiting column 47;

[0066] In this embodiment, Figure 7 As shown, the longitudinal cylindrical cam 53 is connected to the bottom connecting column 56 through the load adjustment cylinder 561, and the overall length is changed by changing the gap size;

[0067] In this embodiment, Figure 8 As shown, the vibration frequency of the load trigger seat 65 is determined by the bottom follower rod 58 and the transverse cylindrical cam 66. The more fluctuations there are on the circumference of the transverse cylindrical cam 66, the faster the vibration frequency;

[0068] In this embodiment, Fig. 9 As shown, the anti-rotation column 62 restricts the rotating connecting platform 61 from rotating when following the bottom connecting column 56 to rise and fall, the vertical moving rod 63 realizes the up and down movement, the vertical return spring 64 remains in the upward state, and the bottom driven rod 58 triggers the downward pressure;

[0069] In this embodiment, Fig.10 As shown, the input pulley 71 receives the intermittent power transmitted by the intermittent driving mechanism 3 and is synchronized with the force storage pressing mechanism 4 to achieve the effect of clamping when the force storage pressing mechanism 4 presses down to apply a load, and releasing when the force storage pressing mechanism 4 is retracted.

[0070] In this embodiment, Fig.11 As shown, the alternating clamping mechanism 7 realizes the conversion of the intermittent rotation of the intermittent driving mechanism 3 into intermittent reciprocating rotation, and the output idler 723 transmits the intermittent reciprocating rotation to the gear rod 741 on the clamping jaw mounting plate 74 by rotating the output shaft 73;

[0071] In this embodiment, Fig.12 As shown, the intermittent rotation output by the intermittent drive mechanism 3 is converted into intermittent reciprocating rotation by utilizing the action of a pair of meshing gears and a set of half gears and an idler gear;

[0072] In this embodiment, Fig.13 As shown, the intermittent reciprocating rotation of the output idler wheel 723 is transmitted to the clamping jaw part, and the clamping jaw part is a four-bar structure that can convert the rotation into direct motion, and the two sides are driven simultaneously through gear meshing;

[0073] In this embodiment, Fig.14 As shown, the internal mounting plate 81 is used to mount the one-way rotating shaft 82 on the friction disk 83 and fit with the clamping jaw part, so that the rock sample and the friction disk 83 are released to rotate;

[0074] In this embodiment, Fig.15As shown, the pulling ropes 842 are respectively installed on different sides of the outer driving wheel 84 and wound around. When the pulling ropes 842 are pulled at the same time, two lateral forces of equal magnitude, parallel and opposite are generated to form a force couple, driving the outer driving wheel 84 to rotate. After the force disappears, the outer driving wheel 84 is reset by rotating the reset spring 843.

[0075] In this embodiment, Fig.16 As shown, the intermittent toggle mechanism 8 utilizes a ratchet mechanism to realize that the one-way rotating shaft 82 drives the friction disk 83 to rotate in one direction, and is synchronized with the alternating clamping mechanism 7 to realize that when the fixed clamping jaws 75 of the alternating clamping mechanism 7 are released, the rock sample is released, thereby increasing the range of the rock sample destruction test.

[0076] An experimental device for simulating dynamic destruction of underlying rocks and a method for using the same include the following steps:

[0077] S1. The rock sample to be tested enters through the sample slot 11 on the side where the intermittent toggle mechanism 8 is not installed, is placed on the sample placement base 2, and is attached to the surface of the friction disk 83;

[0078] S2, start the driving motor 31 of the intermittent driving mechanism 3, convert the uniform rotation into intermittent rotation through the intermittent toggle mechanism 8, the transmission main shaft 34 drives the subsequent four active pulleys 35 to rotate, respectively drive the force storage pressing mechanism 4 and the alternating clamping mechanism 7, so that the force storage pressing mechanism 4 and the alternating clamping mechanism 7 work synchronously;

[0079] S3, the intermittent driving mechanism 3 drives the force-storing pressing mechanism 4 to intermittently move. The force-storing pressing mechanism 4 uses the horizontal sliding limit column 46 and the longitudinal fixed limit column 47 placed vertically, and uses the horizontal moving block 45 and the longitudinal moving block 461 to slide on its surface, so as to decompose the circular rotation into displacement in the longitudinal and horizontal directions, and uses the force-storing spring 442 to store force to make it contract when it is on the side and the top, and release it instantly when it rotates to the bottom, so that the longitudinal moving block 461 has an acceleration effect when it falls in the longitudinal direction. The longitudinal moving block 461 will drive the rotation conversion mechanism 5 to move downward. The rotation conversion mechanism 5 installs the longitudinal cylindrical cam 53 on the longitudinal moving block 461 and The contact protrusion 541 installed on the longitudinal fixed limit column 47 forms a cylindrical cam structure, so that the longitudinal moving block 461 rotates while driving the longitudinal cylindrical cam 53 to descend, converting the downward movement into a simultaneous rotation descent, and utilizing the rotation to drive the vibration conversion mechanism 6 at the bottom, utilizing the longitudinal cylindrical cam 53 to continuously press down the transverse cylindrical cam 66 during rotation and the reset effect of the vertical reset spring 64, to achieve high-frequency up and down vibration, achieving the effect of converting intermittent rotation into high-frequency vibration while descending, and simultaneously installing three sets of force storage pressing mechanisms 4 in an alternating manner to simulate the effect of dynamic destruction of rocks under different frequencies, different loads, and different positions in a complex environment;

[0080] S4, the intermittent driving mechanism 3 drives the alternating clamping mechanism 7 to intermittently move, and the input pulley 71 drives the driving gear 721 and the driven gear 722 to rotate. At this time, the driving half gear 7211 and the driven half gear 7221 drive the output idler gear 723 to rotate clockwise and counterclockwise respectively, and the intermittent rotation output by the intermittent driving mechanism 3 is converted into intermittent reciprocating rotation. The driving gear rod 741 drives the fixed clamping jaw 75 to intermittently clamp and release, and works synchronously with the force storage pressing mechanism 4, that is, to achieve the effect of clamping when the force storage pressing mechanism 4 presses down to apply a load, and to release when the force storage pressing mechanism 4 is retracted. In the process of opening and closing the fixed clamping jaw 75, the outer driving wheel 84 is pulled by pulling the rope 842. Under the action of the pawl groove 841 and the control pawl 821, the unidirectional rotating shaft 82 and the friction disk 83 can be made to rotate unidirectionally, and synchronized with the alternating clamping mechanism 7, when the fixed clamping jaw 75 is released, the friction disk 83 is used to rotate the rock sample, thereby increasing the range of the rock sample destruction test.

[0081] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A test device for simulating dynamic destruction of formation rocks, comprising a device housing (1), characterized in that: The outer surface of the device housing (1) is provided with a sample passing groove (11), the inner surface of the device housing (1) is provided with a pressing passing groove (12), the bottom surface of the device housing (1) is fixedly connected to a sample placement base (2), the top surface of the sample placement base (2) is fixedly connected to a sample placement groove (21), the inner top surface of the device housing (1) is provided with an intermittent driving mechanism (3), the inner top surface of the device housing (1) is provided with a force storage pressing mechanism (4), the bottom surface of the force storage pressing mechanism (4) is provided with a rotation conversion mechanism (5), the bottom surface of the rotation conversion mechanism (5) is provided with a vibration conversion mechanism (6), the inner bottom surface of the device housing (1) is provided with an alternating clamping mechanism (7), and the inner bottom surface of the device housing (1) is provided with an intermittent toggle mechanism (8); The number of the sample passing slots (11) is two, and the two sample passing slots (11) are symmetrically distributed with the central axis of the device housing (1) as the symmetry axis.

2. The device for simulating dynamic destruction of formation rocks according to claim 1 is characterized in that: The intermittent drive mechanism (3) comprises a drive motor (31), the drive motor (31) is fixedly connected to the inner surface of the device housing (1), the output end of the drive motor (31) is fixedly connected to a driving dial (32), the outer surface of the driving dial (32) is meshed with a driven groove wheel (33), one end of the driven groove wheel (33) is fixedly connected to a transmission main shaft (34), the outer surface of the transmission main shaft (34) is fixedly connected to a driving pulley (35), and the outer surface of the driving pulley (35) is sleeved with a transmission belt (36); The other end of the transmission main shaft (34) is rotatably connected to the inner surface of the device housing (1), the number of the driving pulleys (35) is four, and the four driving pulleys (35) are equidistantly distributed on the outer surface of the transmission main shaft (34), and the transmission belt (36) is respectively connected to the force storage pressing mechanism (4) and the alternating clamping mechanism (7).

3. The device for simulating dynamic destruction of formation rocks according to claim 1 is characterized in that: The force storage pressing mechanism (4) comprises a pulley support frame (41), the pulley support frame (41) is fixedly connected to the top surface of the device housing (1), the outer surface of the pulley support frame (41) is rotatably connected to a driven pulley (42), the outer surface of the driven pulley (42) is fixedly connected to an interlaced rotating block (43), the inner surface of the interlaced rotating block (43) is slidably connected to a sliding connecting rod (44), one end of the sliding connecting rod (44) is fixedly connected to a rotating connecting block (441), the outer surface of the sliding connecting rod (44) is sleeved with a force storage spring (442), the outer surface of the rotating connecting block (441) is rotatably connected to a transverse moving block (45), the inner surface of the transverse moving block (45) is slidably connected to a transverse sliding limiting column (46), one end of the transverse sliding limiting column (46) is fixedly connected to a longitudinal moving block (461), and the inner surface of the longitudinal moving block (461) is slidably connected to a longitudinal fixed limiting column (47); The number of the pulley support frames (41) is three, and the three pulley support frames (41) are equidistantly distributed on the inner top surface of the device housing (1); the outer surface of the driven pulley (42) is sleeved with a transmission belt (36); the installation angles of the staggered rotating blocks (43) differ by 180 degrees; the sliding connecting rod (44) passes through the staggered rotating blocks (43); the two ends of the force storage spring (442) are respectively abutted against the rotating connecting block (441) and the staggered rotating block (43); and the longitudinal fixed limit column (47) is fixedly connected to the inner top surface of the device housing (1).

4. The device for simulating dynamic destruction of formation rocks according to claim 3 is characterized in that: The rotation conversion mechanism (5) comprises a rotating shaft support frame (51), the rotating shaft support frame (51) is fixedly connected to the longitudinal moving block (461), the inner surface of the rotating shaft support frame (51) is fixedly connected to a continuously rotating shaft (52), the bottom surface of the continuously rotating shaft (52) is rotatably connected to a longitudinal cylindrical cam (53), the outer surface of the longitudinal cylindrical cam (53) is provided with a cylindrical cam groove (531), the bottom surface of the longitudinal cylindrical cam (53) is fixedly connected to a connecting plug (532), and the longitudinal fixed The bottom surface of the limiting column (47) is fixedly connected to a lug mounting frame (54), the inner surface of the lug mounting frame (54) is fixedly connected to a contact lug (541), the bottom surface of the longitudinal cylindrical cam (53) is mounted with a bottom connecting column (56), the top surface of the bottom connecting column (56) is fixedly connected to a load regulating cylinder (561), the bottom surface of the bottom connecting column (56) is fixedly connected to a bottom rotating disk (57), and the bottom surface of the bottom rotating disk (57) is fixedly connected to a bottom driven rod (58); The radial dimension of the continuously rotating shaft (52) is slightly smaller than the radial dimension of the longitudinal cylindrical cam (53); the longitudinal cylindrical cam (53) passes through the protrusion mounting frame (54); the cylindrical cam groove (531) is slidably connected to the contact protrusion (541); the other end of the connecting plug column (532) passes through the inner surface of the bottom connecting column (56); and the output end of the load regulating cylinder (561) is fixedly connected to the bottom surface of the longitudinal cylindrical cam (53).

5. The device for simulating dynamic destruction of formation rocks according to claim 1 is characterized in that: The vibration conversion mechanism (6) comprises a rotating connection platform (61), the rotating connection platform (61) is rotatably connected to the outer surface of the bottom connection column (56), the inner surface of the rotating connection platform (61) is slidably connected to an anti-rotation column (62), the inner surface of the rotating connection platform (61) is slidably connected to a vertical moving rod (63), the outer surface of the vertical moving rod (63) is sleeved with a vertical return spring (64), the bottom surface of the vertical moving rod (63) is fixedly connected to a load trigger seat (65), and the top surface of the load trigger seat (65) is fixedly connected to a transverse cylindrical cam (66); The anti-rotation column (62) passes through the rotating connection platform (61) and the longitudinal fixed limit column (47); the top surface of the anti-rotation column (62) is fixedly connected to the bottom surface of the longitudinal moving block (461); the vertical moving rod (63) passes through the rotating connection platform (61); the two ends of the vertical return spring (64) are respectively abutted against the vertical moving rod (63) and the load trigger seat (65); and the transverse cylindrical cam (66) is slidably connected to the bottom surface of the bottom driven rod (58).

6. The device for simulating dynamic destruction of formation rock according to claim 1, characterized in that: The alternating clamping mechanism (7) comprises an input pulley (71), the input pulley (71) being rotatably connected to the inner surface of the device housing (1), the inner surface of the device housing (1) being fixedly connected to a gearbox housing (72), the inner surface of the gearbox housing (72) being rotatably connected to a driving gear (721), one end of the driving gear (721) being fixedly connected to a driving half gear (7211), the inner surface of the gearbox housing (72) being rotatably connected to a driven gear (722), one end of the driven gear (722) being fixedly connected to a driven half gear (7221), the inner surface of the gearbox housing (72) being rotatably connected to an output idler gear (723), the One end of the output idler wheel (723) is fixedly connected to a rotating output shaft (73), both ends of the sample placement groove (21) are fixedly connected to a clamping jaw mounting plate (74), the outer surface of the clamping jaw mounting plate (74) is rotatably connected to a gear rod (741), one end of the gear rod (741) is hingedly connected to a synchronous connecting rod (742), the other end of the synchronous connecting rod (742) is hingedly connected to a clamping jaw push-pull rod (743), the outer surface of the synchronous connecting rod (742) is fixedly connected to a clamping jaw connecting rod (744), one end of the gear rod (741) is fixedly connected to a synchronous connecting shaft (745), and the outer surface of the clamping jaw connecting rod (744) is fixedly connected to a fixed clamping jaw (75); The outer surface of the input pulley (71) is sleeved with a transmission belt (36); the input pulley (71) is fixedly connected to a driving gear (721); the driving gear (721) is meshed with a driven gear (722); the driving half gear (7211) and the driven half gear (7221) are respectively meshed with an output idler gear (723) on both sides; the number of the gear rods (741) on each clamping jaw mounting plate (74) is two, and the two gear rods (741) are symmetrically distributed with the central axis of the clamping jaw mounting plate (74) as a symmetry axis, and the two gear rods (741) are meshed with each other; the number of the synchronous connecting shafts (745) is two, and both ends of the two synchronous connecting shafts (745) are fixedly connected to the gear rods (741).

7. The device for simulating dynamic destruction of formation rocks according to claim 1, characterized in that: The intermittent toggle mechanism (8) comprises an internal mounting plate (81), the internal mounting plate (81) is fixedly connected to the inner surface of the device housing (1), the inner surface of the internal mounting plate (81) is rotatably connected to a one-way rotating shaft (82), the outer surface of the one-way rotating shaft (82) is hingedly connected to a control pawl (821), one end of the one-way rotating shaft (82) is fixedly connected to a friction disk (83), the other end of the one-way rotating shaft (82) is rotatably connected to an outer drive wheel (84), the inner surface of the outer drive wheel (84) is provided with a pawl groove (841), the outer surface of the outer drive wheel (84) is fixedly connected to a pulling rope (842), one end of the outer drive wheel (84) is fixedly connected to a rotation return spring (843), and the other end of the pulling rope (842) is fixedly connected to a rope mounting plate (844); The pawl groove (841) is meshed with the control pawl (821), and the control pawl (821) can only rotate in one direction. The other end of the rotation return spring (843) is fixedly connected to the internal mounting plate (81). The number of the pulling ropes (842) is two, and the two pulling ropes (842) are respectively fixed on different sides of the outer driving wheel (84). The number of the rope mounting plates (844) is two, and the two rope mounting plates (844) are both fixedly connected to the fixed clamping claw (75).

8. The method for using the stratum rock dynamic destruction test device according to claim 1 comprises the following steps: S1. The rock sample to be tested enters through the groove (11) from the side where the intermittent toggle mechanism (8) is not installed, is placed on the sample placement base (2), and is attached to the surface of the friction disk (83); S2, starting the driving motor (31) of the intermittent driving mechanism (3), converting the uniform rotation into intermittent rotation through the intermittent toggle mechanism (8), and the transmission main shaft (34) drives the subsequent four active pulleys (35) to rotate, respectively driving the force storage pressing mechanism (4) and the alternating clamping mechanism (7), so that they work synchronously; S3, the intermittent driving mechanism (3) drives the force storage pressing mechanism (4) to intermittently move, and the force storage pressing mechanism (4) uses the horizontal sliding limit column (46) and the longitudinal fixed limit column (47) placed vertically, and uses the horizontal moving block (45) and the longitudinal moving block (461) to slide on the surface, so as to decompose the circular rotation into displacement in the longitudinal and horizontal directions, and uses the force storage spring (442) to store force so that it contracts when it is on the side and the top, and releases it instantly when it rotates to the bottom, so that the longitudinal moving block (461) has an acceleration effect when it falls in the longitudinal direction. The longitudinal moving block (461) drives the rotation conversion mechanism (5) to move downward, and the rotation conversion mechanism (5) is installed with a longitudinal cylindrical cam (5) on the longitudinal moving block (461). 3) and the contact protrusion (541) installed on the longitudinal fixed limit column (47) forms a cylindrical cam structure, so that the longitudinal moving block (461) rotates while driving the longitudinal cylindrical cam (53) to descend, converting the downward movement into a descent with simultaneous rotation, and utilizing the rotation to drive the vibration conversion mechanism (6) at the bottom, utilizing the longitudinal cylindrical cam (53) to continuously press down the transverse cylindrical cam (66) while rotating, and utilizing the reset function of the vertical reset spring (64), thereby realizing high-frequency up and down vibration, achieving the effect of converting intermittent rotation into high-frequency vibration while descending, and simultaneously installing three sets of force storage downward pressing mechanisms (4) to perform staggered operations, so as to simulate the effect of dynamic destruction of rocks under complex environments at different frequencies, different loads, and different positions; S4, the intermittent drive mechanism (3) drives the alternating clamping mechanism (7) to intermittently move, the input pulley (71) drives the driving gear (721) and the driven gear (722) to rotate, and at this time, the driving half gear (7211) and the driven half gear (7221) drive the output idler gear (723) to rotate clockwise and counterclockwise respectively, converting the intermittent rotation output by the intermittent drive mechanism (3) into intermittent reciprocating rotation, and the driving gear rod (741) drives the fixed clamping claw (75) to intermittently clamp and release, and work synchronously with the force storage pressing mechanism (4), that is, realizing Now, the force storage pressing mechanism (4) clamps when pressing down to apply a load, and releases when the force storage pressing mechanism (4) is retracted. In the process of opening and closing the fixed clamping jaw (75), the outer driving wheel (84) is pulled by pulling the rope (842), and under the action of the ratchet groove (841) and the control ratchet (821), the one-way rotating shaft (82) and the friction disk (83) can be rotated in one direction, and synchronized with the alternating clamping mechanism (7), the rock sample is rotated by using the friction disk (83) when the fixed clamping jaw (75) is released, thereby increasing the range of rock sample destruction test.

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