Loading device for rock fracturing simulation and rock fracturing simulation equipment

Abstract

The present invention relates to the field of material testing technology, in particular to a loading device and a rock fracturing simulation device for rock fracturing simulation. Aiming at the problem that it is inconvenient to take and place samples and to clean the pressing plate in the loading device for rock fracturing simulation in the prior art, the following scheme is proposed, which includes a sample placement mechanism, which includes a bottom plate, a support column fixed on the top surface of the bottom plate, a test bench fixed on the top surface of the support column, and a top plate installed directly above the test bench through a lifting assembly, a pressing block is provided on the bottom surface of the top plate, and a second telescopic member for driving the pressing block to rise and fall is installed on the top surface of the top plate; a side pressure mechanism, which has at least two, is used to apply side pressure to the test sample, and the top plate, the test bench and a plurality of side pressure mechanisms are combined to form a loading space for placing a core sample. The present invention can automatically adjust the size of the loading space when taking and placing samples, and can also clean up the debris and dust attached to the inner wall of the pressing plate when the pressing plate is opened outward.

Description

Technical Field

[0001] The invention relates to the field of material detection, and in particular to a loading device and rock fracturing simulation equipment for rock fracturing simulation. Background Art

[0002] Rock fracturing technology is often used in the development of unconventional oil and gas such as shale gas. In order to improve rock fracturing technology and obtain a more efficient mining method, it is necessary to conduct corresponding simulation experiments on rock fracturing technology. The physical simulation of rock fracturing is a method of artificially increasing the internal pressure of rock samples indoors to study the fracturing properties of rocks and the mechanism of crack extension.

[0003] At present, when conducting simulation experiments, a special loading device is used to apply pressure to the rock sample and then measure its parameters. During the simulation process, the test sample will eventually break, causing the sample to be scattered in the loading space. Since the size of the loading space of the existing simulation equipment cannot be automatically adjusted, it is troublesome and time-consuming to take and put the sample. It is also easy for uncleaned samples to be left in the loading space, which can easily have an adverse effect on the test of the next sample. In addition, debris and dust will also adhere to the surface of the pressure plate used for applying pressure. If it is not cleaned in time, it will affect the determination of the parameters of the next sample. In the prior art, each pressure plate is cleaned manually, which not only wastes time but also easily causes omissions. For this reason, the present scheme proposes a loading device and a rock fracturing simulation device for rock fracturing simulation. Summary of the invention

[0004] The loading device and rock fracturing simulation equipment for rock fracturing simulation proposed by the present invention solve the problems of inconvenience in taking and placing samples and inconvenience in cleaning the pressure plate of the loading device for rock fracturing simulation in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] Loading device for rock fracturing simulation, including:

[0007] The layout mechanism comprises a bottom plate, a support column fixed on the top surface of the bottom plate, a test bench fixed on the top surface of the support column, and a top plate installed directly above the test bench through a lifting assembly, wherein a pressing block is provided on the bottom surface of the top plate, and a second telescopic member for driving the pressing block to rise and fall is installed on the top surface of the top plate;

[0008] The side pressure mechanism has at least two parts, the side pressure mechanism includes a fixed plate fixed on the top surface of the bottom plate, a movable plate slidably connected to the top surface of the fixed plate, a side plate hinged on the top surface of the movable plate, a pressure plate installed on the outer wall of one side of the side plate close to the axis of the test bench through a first telescopic member, a transmission assembly installed on the test bench, and a linkage assembly installed on the movable plate for driving the side plate to flip, the transmission assembly is connected to the movable plate in a transmission manner, and is used to drive the movable plate to move along the radial direction of the test bench;

[0009] A driving mechanism, which is arranged below the test bench and is used to drive the lifting assembly and the linkage assembly to operate;

[0010] The number of cleaning mechanisms is the same as that of the side pressure mechanisms, and they correspond one-to-one to the side pressure mechanisms. The cleaning mechanisms include a bellows fixed to the bottom surface of the top plate and an air supply assembly installed on the top surface of the fixed plate in the pressure mechanism directly below the bellows. The air supply assembly is connected to the bellows through an air supply pipe and is used to supply air to the bellows when the pressure plate is flipped outward.

[0011] The top plate, the test bench and the pressure plates in the multiple side pressure applying mechanisms together form a loading space for placing the core sample.

[0012] Through the above technical solution, not only can the size of the loading space be automatically adjusted when taking and placing samples, but also the debris and dust attached to the inner wall of the pressing plate can be cleaned off when the pressing plate is opened outward, which greatly facilitates the use and maintenance of the equipment by testers.

[0013] As a further improvement of the above scheme, the lifting assembly includes at least two lifting screws rotatably connected to the test bench and a fixed gear fixed to the bottom of the lifting screws, the top plate is threadedly sleeved on the outer periphery of the lifting screws, and a positioning block is fixed on the top of the lifting screws.

[0014] Through the above technical solution, the top plate can be raised and lowered by driving the lifting screw to rotate.

[0015] As a further improvement of the above scheme, the bottom surface of the test bench is provided with an annular groove coaxially arranged therewith, and the end of the movable plate close to the test bench is provided with a screw hole arranged along the radial direction of the test bench, and the transmission assembly includes a transmission screw rotatably connected in the annular groove and a transmission gear fixed at one end of the transmission screw, and the other end of the transmission screw extends into the screw hole and is threadedly connected thereto.

[0016] Through the above technical solution, by driving the transmission screw to rotate in the stationary direction, the movable plate can be driven to move in the direction of approaching or moving away from the test bench.

[0017] As a further improvement of the above scheme, the driving mechanism includes an active gear ring arranged directly below the test bench, a gear ring sleeved on the outer periphery of the active gear ring, a driven gear ring fixed on the top surface of the active gear ring, a mounting ring rotatably sleeved on the outer periphery of the support column, and a power part installed on the top surface of the base plate for driving the active gear ring to rotate, the active gear ring is located outside the mounting ring and is coaxially arranged with the mounting ring, a plurality of connecting columns are fixed between the outer ring of the mounting ring and the inner ring of the active gear ring, the outer ring of the gear ring is meshed with the fixed gear, and the top surface of the driven gear ring extends into the annular groove and is meshed with the transmission gear.

[0018] Through the above technical solution, the lifting screw and the transmission screw can be driven to rotate simultaneously after the active ring gear rotates.

[0019] As a further improvement of the above scheme, at least two power members are provided, and the power members include a driving shaft rotatably connected to the outer periphery of the support column, a driving gear and a driven gear sleeved on the outer periphery of the driving shaft, a third telescopic member installed on the top surface of the base plate, and a rack fixed on the output end of the third telescopic member, the driving gear is located on the bottom surface of the driving gear ring and meshes with it, and the rack meshes with the driven gear.

[0020] Through the above technical solution, the extension and retraction of the third telescopic member is utilized to drive the active ring gear to rotate.

[0021] As a further improvement of the above solution, a limiting groove is provided on the top surface of the fixed plate, a limiting block is fixed on the bottom surface of the movable plate, and the bottom of the limiting block extends into the limiting groove and is slidably connected thereto.

[0022] Through the above technical solution, the movable plate is prevented from rotating along with the driving screw, thereby ensuring that the movable plate can only move along the radial direction of the test bench.

[0023] As a further improvement of the above scheme, a fixing groove is provided on the top surface of the fixed plate, a plurality of tooth grooves are provided on one long side of the fixing groove, a mounting groove is provided on the top surface of the movable plate, the linkage assembly includes a linkage screw rotatably connected in the mounting groove, a moving block threadedly sleeved on the outer periphery of the linkage screw, a connecting rod hinged on the top surface of the moving block, and a linkage shaft rotatably connected to the end of the movable plate away from the test bench, the bottom surface of the moving block abuts against the bottom surface of the mounting groove, the other end of the connecting rod is hinged to the outer wall of the side plate, one end of the linkage screw extends to the outside of the movable plate and is transmission-connected to the top of the linkage shaft, the bottom of the linkage shaft extends into the fixed groove and is fixed with a linkage gear, and the linkage gear is meshed with the tooth groove.

[0024] Through the above technical solution, the movable plate can be driven to rotate while the linkage screw is moved, thereby achieving the purpose of driving the pressure plate to flip while the movable plate is moving.

[0025] As a further improvement of the above scheme, the gas delivery assembly includes an air cylinder fixed on the top surface of a fixed plate, a piston plate arranged in the air cylinder and a piston column fixed at one end of the piston plate, a fixing block is fixed on the outer wall of the fixed plate on one side close to the air cylinder, the other end of the piston column extends to the outside of the air cylinder and is fixedly connected to the fixing block, an air intake pipe is installed at the tail of the air cylinder, and a one-way valve is installed on both the air intake pipe and the air delivery pipe.

[0026] Through the above technical solution, air can be input into the bellows while the pressing plate is turned outward, so as to clean off the debris and dust attached to the inner wall of the pressing plate.

[0027] The rock fracturing simulation device comprises a loading device for rock fracturing simulation, a base, a control console installed on the top surface of the base and a sample placing mechanism installed on the top surface of the base, wherein the loading device for rock fracturing simulation is installed on the top of the base.

[0028] Through the above technical solution, the first telescopic member, the second telescopic member and the third telescopic member can be controlled by the console.

[0029] As a further improvement of the above solution, the sample placement mechanism includes a fixed shaft fixed to the top surface of the base, a placement table rotatably connected to the top surface of the fixed shaft, and a plurality of limit rings fixed to the top surface of the placement table.

[0030] The above technical solution makes it convenient to place and take out the test samples when there are a large number of test samples.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. Through the cooperation between the lofting mechanism, the side pressure mechanism and the driving mechanism, the side pressure mechanism can be driven away from the center of the test bench while the top plate is driven to rise, which is convenient for the staff to clean the samples in the loading space. At the same time, the side pressure mechanism can be driven to the side close to the center of the test bench while the top plate is lowered, which is convenient for loading the test samples.

[0033] 2. Through the cooperation between the transmission assembly and the linkage assembly, the side plate and the pressure plate can be driven to flip outward when the movable plate moves to the side away from the test bench, so as to make it more convenient for the test personnel to take, place and clean the samples in the loading space. When the movable plate moves to the side close to the test bench, the side plate and the pressure plate can be automatically driven to flip back.

[0034] 3. Through the setting of the cleaning mechanism, the air in the air cylinder can be pressed into the bellows and sprayed out while the pressing plate is turned outward, thereby cleaning the dust and debris adhering to the inner wall of the pressing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A perspective view of the present invention;

[0036] Figure 2 It is a schematic diagram of the bottom structure of the top plate of the present invention;

[0037] Figure 3 This is a schematic diagram of the structure of the present invention after removing the top plate;

[0038] Figure 4 This is a bottom view of the present invention after removing the bottom plate;

[0039] Figure 5 for Figure 4 The enlarged view of point A in the middle;

[0040] Figure 6 is a bottom view of the annular groove;

[0041] Figure 7 This is a schematic diagram of the structure of the present invention after the pressing plate is opened;

[0042] Figure 8 It is a front cross-sectional view of the present invention;

[0043] Fig. 9 for Figure 8 The enlarged view of point B in the middle;

[0044] Fig.10 This is a front view of the rock fracturing simulation equipment.

[0045] Description of main symbols:

[0046] 1. Bottom plate; 2. Test bench; 3. Top plate; 4. Lifting screw; 5. Pressing plate; 6. First telescopic member; 7. Side plate; 8. Connecting rod; 9. Air pipe; 10. Air cylinder; 11. Movable plate; 12. Fixed groove; 13. Linkage shaft; 14. Fixed plate; 15. Linkage screw; 16. Moving block; 17. Active gear ring; 18. Piston column; 19. Second telescopic member; 20. Pressing block; 21. Bellows; 22. Fixed gear; 23. Third telescopic member 1. a gear; 2. a gear rack; 3. a driving gear; 4. a gear ring; 5. a mounting ring; 6. a supporting column; 7. a driving shaft; 8. a driven gear; 9. a ring groove; 10. a transmission gear; 11. a transmission screw; 12. a mounting groove; 13. a linkage gear; 14. a limit groove; 15. a screw hole; 16. a limit block; 17. a driven gear ring; 18. a control console; 19. a fixed shaft; 20. a placing table; 21. a limit ring; 22. a base. DETAILED DESCRIPTION

[0047] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0048] Embodiment 1:

[0049] Please combine Figure 1 - Fig. 9 The loading device for rock fracturing simulation of this embodiment includes:

[0050] The sample placing mechanism comprises a bottom plate 1, a support column 28 fixed on the top surface of the bottom plate 1, a test bench 2 fixed on the top surface of the support column 28, and a top plate 3 installed directly above the test bench 2 through a lifting assembly, a pressure block 20 is provided on the bottom surface of the top plate 3, and a second telescopic member 19 for driving the pressure block 20 to be lifted and lowered is installed on the top surface of the top plate 3. The lifting assembly comprises at least two lifting screws 4 rotatably connected to the test bench 2 and a fixed gear 22 fixed on the bottom surface of the lifting screw 4. The top plate 3 is threadedly sleeved on the outer periphery of the lifting screw 4, and a positioning block is fixed on the top of the lifting screw 4. The top plate 3 constitutes the top of the loading space. The forward rotation of the lifting screw 4 drives the top plate 3 to rise, and the loading space becomes larger, which is conducive to the placement of the sample. After the sample is placed, the lifting screw 4 is driven to reverse, and the top plate 3 descends. After the top plate 3 descends to the set position, it stops, and then the second telescopic member 19 extends, driving the pressure block 20 to descend and press on the top of the sample, thereby maintaining the stability of the sample. At the same time, a vertical downward force can also be applied to the sample to test its vertical pressure-bearing performance.

[0051] The side pressure mechanism has at least two, the side pressure mechanism includes a fixed plate 14 fixed to the top surface of the bottom plate 1, a movable plate 11 slidably connected to the top surface of the fixed plate 14, a side plate 7 hinged to the top surface of the movable plate 11, a pressure plate 5 installed on the outer wall of the side of the side plate 7 close to the axis of the test bench 2 through a first telescopic member 6, a transmission component installed on the test bench 2 and a linkage component installed on the movable plate 11 for driving the side plate 7 to flip when it moves in the radial direction of the test bench 2, wherein the top plate 3, the test bench 2 and the pressure plates 5 in the multiple side pressure mechanisms enclose a loading space for placing core samples. During testing, the sample to be tested is placed in the loading space. At this time, the sample is placed on the top of the test bench 2. After the multiple pressure plates 5 are gradually closed, the first telescopic member 6 is extended, and the pressure plate 5 approaches the test bench 2, so that side pressure can be applied to the test sample, and then the performance of the sample's side to withstand pressure is tested.

[0052] The transmission assembly is transmission-connected with the movable plate 11 and is used to drive the movable plate 11 to move in the radial direction of the test bench 2. The bottom surface of the test bench 2 is provided with an annular groove 31 coaxially arranged therewith. The end of the movable plate 11 close to the test bench 2 is provided with a screw hole 37 arranged in the radial direction of the test bench 2. The transmission assembly includes a transmission screw 33 rotatably connected in the annular groove 31 and a transmission gear 32 fixed at one end of the transmission screw 33. The transmission screw 33 is arranged in the radial direction of the annular groove 31, and the other end of the transmission screw 33 extends into the screw hole 37 and is screwed therewith. The top surface of the fixed plate 14 is provided with a limit groove 36 arranged in the radial direction of the test bench 2. The movable plate 11 A limit block 38 is fixed to the bottom surface of the test bench 2, and the bottom of the limit block 38 extends into the limit groove 36 and slides therewith. When the transmission gear 32 rotates forward, it drives the transmission screw 33 to rotate forward. After the transmission screw 33 rotates forward, it drives the movable plate 11 away from the test bench 2 in the radial direction of the test bench 2, thereby driving the side plate 7 and the pressure plate 5 to move in the direction away from the axis of the test bench 2, thereby increasing the loading space. Conversely, when the transmission gear 32 is reversed, it can drive the movable plate 11 to move closer to one side of the test bench 2, and the loading space becomes smaller. The setting of the limit block 38 and the limit groove 36 makes the movable plate 11 only move in the radial direction of the test bench 2, and will not rotate with the transmission screw 33.

[0053] A fixing groove 12 arranged along the radial direction of the test bench 2 is formed on the top surface of the fixed plate 14, and a plurality of tooth grooves are formed on one long side of the fixing groove 12. A mounting groove 34 arranged along the radial direction of the test bench 2 is formed on the top surface of the movable plate 11. The linkage assembly includes a linkage screw 15 rotatably connected in the mounting groove 34, a moving block 16 threadedly sleeved on the outer periphery of the linkage screw 15, a connecting rod 8 hinged on the top surface of the moving block 16, and a linkage shaft 13 rotatably connected to the end of the movable plate 11 away from the test bench 2. The linkage screw 15 is arranged along the length direction of the mounting groove 34, and the bottom surface of the moving block 16 abuts against the bottom surface of the mounting groove 34. The other end of the connecting rod 8 is hinged to the outer wall of the side plate 7. One end of the linkage screw 15 extends to the outside of the movable plate 11 and is fixed with a driven bevel gear. The top of the linkage shaft 13 is fixed with an active bevel gear meshing with the driven bevel gear. The bottom of the shaft 13 extends into the fixed groove 12 and is fixed with a linkage gear 35. The linkage gear 35 is meshed with the tooth groove. When the movable plate 11 moves, the linkage shaft 13 is driven to move synchronously. When the movable plate 11 moves to the side away from the test bench 2, it drives the linkage shaft 13 to move synchronously, and the linkage gear 35 rotates forward along the tooth groove, thereby driving the linkage screw 15 to rotate forward. After the linkage screw 15 rotates forward, it drives the moving block 16 to move to the side away from the side plate 7. The moving block 16 then drives the side plate 7 to flip outward through the connecting rod 8, so that the pressure plate 5 can flip outward when following the movable plate 11 to move away from the test bench 2. Conversely, when the movable plate 11 moves to the side close to the test bench 2, it drives the moving block 16 to move to the side close to the side plate 7, thereby driving the side plate 7 to flip back again until the side plate 7 and the pressure plate 5 are realigned.

[0054] The driving mechanism is arranged under the test bench 2 and is used to drive the lifting assembly and the linkage assembly to operate. The driving mechanism drives the fixed gear 22 to rotate forward while driving the transmission gear 32 to rotate forward, so that the movable plate 11 can be driven to move to the side away from the test bench 2 while the top plate 3 rises, and the transmission gear 32 can be driven to reverse while the fixed gear 22 is driven to reverse, so that the movable plate 11 can also move to the side close to the test bench 2 while the top plate 3 descends.

[0055] The number of cleaning mechanisms is the same as that of the side pressure mechanisms, and they correspond one-to-one to the side pressure mechanisms. The cleaning mechanisms include a bellows 21 fixed to the bottom surface of the top plate 3 and an air supply assembly installed on the top surface of the fixed plate 14 in the pressure mechanism directly below it. A plurality of air jet holes are provided on the bottom surface of the bellows 21. The air supply assembly is connected to the bellows 21 through an air supply pipe 9 and is used to supply air to the bellows 21 when the pressing plate 5 is flipped outward. When the movable plate 11 moves to the side away from the test bench 2, the air supply assembly inputs air into the bellows 21, and then the air is ejected from the air jet holes and sprayed on the inner wall of the pressing plate 5, thereby cleaning away the debris and dust adhering to the inner wall of the pressing plate 5.

[0056] In this embodiment, the first telescopic member 6 and the second telescopic member 19 are both hydraulic cylinders, and the position of the lifting screw 4 on the test bench 2 is on the symmetry line between adjacent pressure plates 5 and is on the outside of the pressure plates 5, so as not to affect the opening, closing and flipping of the pressure plates 5.

[0057] The implementation principle of this embodiment is as follows: when testing the sample, the loading space is first opened. At this time, the top plate 3 is in a raised state, and the top surface of the top plate 3 is in contact with the positioning block at the top of the lifting screw 4. The first telescopic member 6 and the second telescopic member 19 are both in a retracted state, and the pressing plate 5 is also in an outwardly opened state. Then, the sample to be tested is placed in the loading space, and the sample is placed at the center of the test bench 2. Then, the driving mechanism is started to drive the lifting screw 4 and the transmission screw 33 to reverse. After the lifting screw 4 reverses, the top plate 3 is driven to descend. After the transmission screw 33 reverses, the movable plate 11 is driven to move to the side close to the test bench 2. While the movable plate 11 approaches the test bench 2, the linkage gear 35 reverses while approaching the test bench 2 along the tooth groove direction, thereby driving the linkage screw 15 to reverse. At this time, the moving block 16 moves to the side close to the side plate 7. The side plate 7 is moved, thereby driving the side plate 7 to gradually flip back to the side close to the test bench 2, until one end of the movable plate 11 abuts against the outer periphery of the test bench 2 and then the driving mechanism is stopped. At this time, the side plate 7 is completely straightened and is in a state perpendicular to the top surface of the test bench 2. Then, the first telescopic member 6 or the second telescopic member 19 is started to extend according to the test needs. When the first telescopic member 6 is extended, it drives the pressing plate 5 to move in the direction close to the sample to be tested, until the pressing plate 5 surrounds the outer periphery of the sample to be tested, and then the first telescopic member 6 is driven to continue to extend until the sample is broken, and then the pressure value output by the first telescopic member 6 when it is broken is recorded, so as to detect the side pressure bearing performance of the sample to be tested. When the second telescopic member 19 is driven to extend, it will drive the pressing block 20 to descend, and the pressing block 20 is pressed on the top of the sample to be tested, thereby applying a vertical downward force to the sample, and its vertical pressure bearing performance is tested;

[0058] After the test is completed, the first telescopic member 6 or the second telescopic member 19 is started to retract back to its original position, and then the lifting screw 4 and the transmission screw 33 are driven to rotate forward through the driving mechanism. At this time, the top plate 3 rises upward, and the movable plate 11 also moves to the side away from the test bench 2. During this process, the side plate 7 and the pressure plate 5 will flip outward in the process of moving away from the test bench 2, thereby further increasing the loading space, making it convenient for the tester to take out the broken sample from the loading space, and while the movable plate 11 moves away from the test bench 2, the air supply component inputs air into the bellows 21 and then sprays it from the air jet hole onto the inner wall of the pressure plate 5, thereby cleaning away the debris and dust adhering to the inner wall of the pressure plate 5.

[0059] Embodiment 2:

[0060] Combination Figure 4 - Fig. 9 The present embodiment is further improved on the basis of the embodiment 1 in that the driving mechanism comprises an active gear ring 17 arranged directly below the test bench 2, a gear ring 26 sleeved on the outer periphery of the active gear ring 17, a driven gear ring 39 fixed on the top surface of the active gear ring 17, a mounting ring 27 rotatably sleeved on the outer periphery of the support column 28, and a power member mounted on the top surface of the bottom plate 1 for driving the active gear ring 17 to rotate, the active gear ring 17 is located outside the mounting ring 27 and is coaxially arranged with the mounting ring 27, and the outer ring of the mounting ring 27 is connected to the driven gear ring 39. A plurality of connecting columns are fixed between the inner rings of the active gear ring 17, the outer ring of the gear ring 26 meshes with the fixed gear 22, the driven gear ring 39 is coaxially arranged with the active gear ring 17, and the top surface of the driven gear ring 39 extends into the annular groove 31 and meshes with the transmission gear 32. When the active gear ring 17 rotates, it will drive the driven gear ring 39 and the gear ring 26 to rotate at the same time, thereby driving the fixed gear 22 and the transmission gear 32 to rotate at the same time, thereby driving the movable plate 11 to move while driving the top plate 3 to rise and fall.

[0061] At least two power members are provided, and the power members include a driving shaft 29 rotatably connected to the outer periphery of the support column 28, a driving gear 25 and a driven gear 30 sleeved on the outer periphery of the driving shaft 29, a third telescopic member 23 installed on the top surface of the base plate 1, and a rack 24 fixed on the output end of the third telescopic member 23. The driving gear 25 is located on the bottom surface of the driving ring gear 17 and meshes with it. The rack 24 meshes with the driven gear 30. The diameter of the driven gear 30 is smaller than that of the driving gear 25. The third telescopic member 23 telescopes to drive the rack 24 to move, thereby driving the driving gear 25 to rotate, and then driving the driving ring gear 17 to rotate.

[0062] In this embodiment, the third telescopic member 23 is a hydraulic cylinder.

[0063] The implementation principle of this embodiment is as follows: when the third telescopic member 23 is driven to extend, the rack 24 moves forward accordingly, and at this time the rack 24 drives the driven gear 30 to rotate forward, and the driven gear 30 then drives the driving gear 25 to rotate forward through the driving shaft 29, and the driving gear 25 then drives the driving ring gear 17 to rotate forward, and the driving ring gear 17 then drives the driven ring gear 39 and the gear ring 26 to rotate forward at the same time, so that the movable plate 11 can be driven to move to the side away from the test bench 2 while the top plate 3 is driven to rise. On the contrary, when the third telescopic member 23 is retracted, the rack 24 retracts, driving the driven gear 30 to reverse, and then driving the driving ring gear 17 to reverse, and finally driving the driven ring gear 39 and the gear ring 26 to reverse at the same time, so that the movable plate 11 can be driven to move to the side close to the test bench 2 while the top plate 3 is driven to descend, until one end of the movable plate 11 abuts against the outer periphery of the test bench 2 and the retraction of the third telescopic member 23 is stopped.

[0064] Embodiment 3:

[0065] Combination Figure 1 - Figure 4 and Figure 7 - Fig. 9 Based on Examples 1 and 2, this embodiment is further improved in that the gas delivery assembly includes a gas cylinder 10 fixed to the top surface of a fixed plate 14, a piston plate arranged in the gas cylinder 10, and a piston column 18 fixed to one end of the piston plate. A fixing block is fixed on the outer wall of the fixed plate 14 on one side close to the gas cylinder 10. The other end of the piston column 18 extends to the outside of the gas cylinder 10 and is fixedly connected to the fixing block. An air intake pipe is installed at the tail of the gas cylinder 10, and a one-way valve is installed on the air intake pipe and the gas delivery pipe 9.

[0066] The implementation principle of this embodiment is as follows: when the movable plate 11 moves, the piston column 18 will be driven to move at the same time, and after the piston column 18 moves, the piston plate will be driven to move synchronously. When the movable plate 11 moves to the side away from the test bench 2, the piston column 18 will be driven to move toward the inside of the air cylinder 10, so that the air in the air cylinder 10 is input into the bellows 21 through the air supply pipe 9, and the air in the bellows 21 is then ejected from the air jet hole to clean the inner wall of the pressure plate. When the movable plate 11 moves to the side close to the test bench 2, the piston column 18 will be driven to move to the outside of the air cylinder 10, so that the outside air is sucked into the inside of the air cylinder 10 through the air intake pipe.

[0067] Embodiment 4:

[0068] Combination Fig.10 The present embodiment is further improved on the basis of the embodiments 1-3 in that: the rock fracturing simulation device includes a loading device for rock fracturing simulation, and also includes a base 44, a control console 40 installed on the top surface of the base 44, and a sample placement mechanism installed on the top surface of the base 44. The loading device for rock fracturing simulation is installed on the top of the base 44, and the sample placement mechanism includes a fixed shaft 41 fixed on the top surface of the base 44, a placement table 42 rotatably connected to the top surface of the fixed shaft 41, and a plurality of limit rings 43 fixed on the top surface of the placement table 42, and the limit rings 43 are evenly distributed. On the top surface of the placement table 42, a display screen and buttons for controlling the operation of the first telescopic member 6, the second telescopic member 19 and the third telescopic member 23 are provided on the console 40, and a pressure sensor is installed on the console 40, and the pressure sensor is electrically connected to the first telescopic member 6, the second telescopic member 19 and the third telescopic member 23, so that the pressure values ​​output by the first telescopic member 6, the second telescopic member 19 and the third telescopic member 23 can be displayed on the display screen, so that the pressure values ​​output by the first telescopic member 6, the second telescopic member 19 and the third telescopic member 23 can be clearly known.

[0069] The implementation principle of this embodiment is: when testing the properties of samples, multiple samples can be placed in multiple limit rings 43 respectively. When they are needed, the placement table 42 is rotated to take the samples. After that, after the test samples are placed in the loading space, instructions can be issued to the first telescopic part 6, the second telescopic part 19 and the third telescopic part 23 through the control console 40 to control their operation.

[0070] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A loading device for rock fracturing simulation, characterized in that: include, The layout mechanism comprises a bottom plate, a support column fixed on the top surface of the bottom plate, a test bench fixed on the top surface of the support column, and a top plate installed directly above the test bench through a lifting assembly, wherein a pressing block is provided on the bottom surface of the top plate, and a second telescopic member for driving the pressing block to rise and fall is installed on the top surface of the top plate; The side pressure mechanism has at least two parts, the side pressure mechanism includes a fixed plate fixed on the top surface of the bottom plate, a movable plate slidably connected to the top surface of the fixed plate, a side plate hinged on the top surface of the movable plate, a pressure plate installed on the outer wall of one side of the side plate close to the axis of the test bench through a first telescopic member, a transmission assembly installed on the test bench, and a linkage assembly installed on the movable plate for driving the side plate to flip, the transmission assembly is connected to the movable plate in a transmission manner, and is used to drive the movable plate to move along the radial direction of the test bench; A driving mechanism, which is arranged below the test bench and is used to drive the lifting assembly and the linkage assembly to operate; The number of cleaning mechanisms is the same as that of the side pressure mechanisms, and they correspond to each other one by one. The cleaning mechanisms include a bellows fixed to the bottom surface of the top plate and an air supply assembly installed on the top surface of the fixed plate in the pressure mechanism directly below the bellows. The air supply assembly is connected to the bellows through an air supply pipe and is used to supply air to the bellows when the pressure plate is turned outward. The top plate, the test bench and the pressure plates in the multiple side pressure applying mechanisms together form a loading space for placing the core sample; The top surface of the fixed plate is provided with a fixing groove, one long side of the fixing groove is provided with a plurality of tooth grooves, the top surface of the movable plate is provided with a mounting groove, the linkage assembly comprises a linkage screw rotatably connected in the mounting groove, a moving block threadedly sleeved on the outer periphery of the linkage screw, a connecting rod hinged on the top surface of the moving block, and a linkage shaft rotatably connected to an end of the movable plate away from the test bench, the bottom surface of the moving block abuts against the bottom surface of the mounting groove, the other end of the connecting rod is hinged to the outer wall of the side plate, one end of the linkage screw extends to the outside of the movable plate and is transmission-connected to the top of the linkage shaft, the bottom of the linkage shaft extends into the fixing groove and is fixed with a linkage gear, and the linkage gear is meshed with the tooth groove; The lifting assembly includes at least two lifting screws rotatably connected to the test bench and a fixed gear fixed to the bottom surface of the lifting screws, the top plate is threadedly sleeved on the outer periphery of the lifting screws, a positioning block is fixed on the top of the lifting screws, the bottom surface of the test bench is provided with an annular groove coaxially arranged therewith, the end of the movable plate close to the test bench is provided with a screw hole arranged along the radial direction of the test bench, the transmission assembly includes a transmission screw rotatably connected in the annular groove and a transmission gear fixed to one end of the transmission screw, and the other end of the transmission screw extends into the screw hole and is threadedly connected thereto; The driving mechanism includes an active gear ring arranged directly below the test bench, a gear ring sleeved on the outer circumference of the active gear ring, a driven gear ring fixed on the top surface of the active gear ring, a mounting ring rotatably sleeved on the outer circumference of the support column, and a power member mounted on the top surface of the base plate for driving the active gear ring to rotate, the active gear ring is located outside the mounting ring and is coaxially arranged with the mounting ring, a plurality of connecting columns are fixed between the outer ring of the mounting ring and the inner ring of the active gear ring, the outer ring of the gear ring is meshed with the fixed gear, and the top surface of the driven gear ring extends into the annular groove and is meshed with the transmission gear.

2. The loading device for rock fracturing simulation according to claim 1, characterized in that: At least two power members are provided, and the power members include a driving shaft rotatably connected to the outer periphery of the support column, a driving gear and a driven gear sleeved on the outer periphery of the driving shaft, a third telescopic member installed on the top surface of the base plate, and a rack fixed on the output end of the third telescopic member, the driving gear is located on the bottom surface of the driving gear ring and meshes with it, and the rack meshes with the driven gear.

3. The loading device for rock fracturing simulation according to claim 1, characterized in that: The top surface of the fixed plate is provided with a limiting groove, the bottom surface of the movable plate is fixed with a limiting block, and the bottom of the limiting block extends into the limiting groove and is slidably connected therewith.

4. The loading device for rock fracturing simulation according to claim 1, characterized in that: The gas delivery assembly includes an air cylinder fixed on the top surface of a fixed plate, a piston plate arranged in the air cylinder and a piston column fixed at one end of the piston plate. A fixing block is fixed on the outer wall of the fixed plate on one side close to the air cylinder. The other end of the piston column extends to the outside of the air cylinder and is fixedly connected to the fixing block. An air intake pipe is installed at the tail of the air cylinder. Both the air intake pipe and the air delivery pipe are installed with a one-way valve.

5. Rock fracturing simulation equipment, characterized in that: It comprises a loading device for rock fracturing simulation as described in any one of claims 1 to 4, and also comprises a base, a control console installed on the top surface of the base and a sample placement mechanism installed on the top surface of the base, wherein the loading device for rock fracturing simulation is installed on the top of the base.

6. The rock fracturing simulation device according to claim 5, characterized in that: The sample placement mechanism comprises a fixed shaft fixed on the top surface of the base, a placement table rotatably connected to the top surface of the fixed shaft, and a plurality of limiting rings fixed on the top surface of the placement table.

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