A core fracture creation device and method with controllable fracture characteristics

Abstract

The present invention relates to the technical field of core fracture making, and specifically to a core fracture making device and method with controllable fracture characteristics, comprising an outer frame, wherein a fracture making component is provided inside the outer frame, and the fracture making component comprises a fracture making rock bin fixedly installed inside the outer frame. The transmission rod is driven to rotate by the output shaft of a hydraulic servo motor, and the rotation of the transmission rod drives two vertical push cams to rotate, pushing the two shift bars together with two hammer rods, guide rails, opposing tooth frames, connecting frames, shock-absorbing rubber pads, and hammers upward, and the two first return springs are compressed and stored, and further under the continuous rotation of the vertical push cam and the rebound force of the first return spring after the guide rail moves upward, the hammer is reciprocated up and down to hammer the top of the core, and the pressure of the two fracture making cutter heads on the core makes it easier to form cracks, and the two fracture making cutter heads are prevented from crushing the core.

Description

Technical Field

[0001] The invention relates to the technical field of core fracture making, and in particular to a core fracture making device and method with controllable fracture characteristics. Background Art

[0002] Reservoir core permeability refers to the ability of rock to allow fluids, usually oil or gas, to pass through its pore structure. This parameter is crucial to the development of oil and gas fields because it directly affects the extraction efficiency and economic benefits. Therefore, accurately measuring the permeability of cores is a basic and critical task in oil and gas exploration and production. For reservoirs with poor physical properties, a large amount of fluid is injected into the reservoir after drilling to form artificial fractures in the target reservoir, thereby expanding the seepage channel, which can effectively increase oil and gas production. In real formations, fractures formed by hydraulic fracturing will form branch fractures at the stress mutation site, and the fracture extension direction is also transient. At the same time, the fractures have certain spatial cross-linking characteristics;

[0003] According to a Chinese patent with application publication number CN118329736A, a reservoir core permeability measuring device is disclosed. The core sample to be tested is loaded through a horizontal detection sleeve, and the detection delivery pipes on both sides can be connected to a pressure gauge and a booster pump structure. While one end is delivering pressurization, the pressure of the detection delivery pipe at the other end and the amount of gas or liquid delivered are measured to determine the permeability of the tested core. At the same time, the device is also provided with axial and radial fracturing mechanisms. According to needs, the core is formed with cracks of different structures, sizes and directions, and then the corresponding permeability changes are tested. The overall applicability and flexibility of use are higher. Nevertheless, when the above-mentioned device is used to make cracks in the core, the fracturing cutter applies pressure on the surface of the core, and the local stress at the contact part of the core and the fracturing cutter is relatively large. The core is easily broken as a whole before cracks occur, resulting in core crack failure. For this reason, we propose a core fracturing device and method with controllable crack characteristics to solve the above-mentioned technical problems. Summary of the invention

[0004] The present invention provides the following technical solutions: a core fracture making device with controllable fracture characteristics, comprising an outer frame;

[0005] A seam-making component is provided inside the outer frame, and the seam-making component is used for core seam-making;

[0006] A positioning component is provided inside the seam-making component, and the positioning component is used for core positioning.

[0007] As a preferred solution of the present invention, the seam-making component includes a seam-making rock bin fixedly installed inside an outer frame, two hammer rods are slidably installed on the top of the seam-making rock bin, the two hammer rods are movably extended to the inside of the seam-making rock bin, and the two hammer rods are symmetrically distributed about the central axis of the seam-making rock bin, a guide rail is commonly fixedly installed at the bottom of the two hammer rods, a first return spring is provided on the outer sleeve of the hammer rod, the first return spring is fixedly installed between the top wall of the seam-making rock bin and the top of the guide rail, a shift bar is fixedly installed on the upper part of the outer wall of the two hammer rods, two bearing seats are fixedly installed on the top of the seam-making rock bin, a transmission rod is rotatably installed inside the two bearing seats, two vertical push cams are fixedly installed on the outer wall of the transmission rod, and the positions of the two vertical push cams correspond one by one to the positions of the two shift bars, a servo motor is fixedly installed inside the outer frame through a bracket, the end of the output shaft of the servo motor is fixedly connected to the end of the transmission rod by a coupling, and a hammer is provided at the bottom of the guide rail.

[0008] As a preferred solution of the present invention, opposing tooth frames are slidably installed inside the guide rail, a connecting frame is fixedly installed at the bottom of the connecting frame, two shock-absorbing rubber pads are fixedly installed at the bottom of the connecting frame, the two shock-absorbing rubber pads are symmetrically distributed about the central axis of the connecting frame, and the hammer is fixedly installed at the bottom of the two shock-absorbing rubber pads.

[0009] As a preferred solution of the present invention, an incomplete gear is rotatably provided inside the opposing tooth frame, and the incomplete gear is meshed with the opposing tooth frame, and an adjusting vertical shaft is fixedly installed on the inner wall of the incomplete gear, and the adjusting vertical shaft movably penetrates the guide rail and the seam-making rock bin and extends to the top periphery of the seam-making rock bin, and the outer peripheral sliding sleeve of the adjusting vertical shaft is provided with a movable sleeve, and a driven pulley is fixedly installed on the outer wall of the movable sleeve, and a positioning shaft pin is fixedly installed on the top of the two bearing seats, and a tensioning pulley is rotatably installed on the outer wall of the positioning shaft pin, and a stepping belt is jointly sleeved on the periphery of the driven pulley and the two tensioning pulleys, and a plurality of equally spaced helical teeth are provided at the bottom of the stepping belt, and a reciprocating cam is fixedly installed on the outer wall of the transmission rod, and a path pin is slidably installed in the path groove of the reciprocating cam, and a stepping push seat is fixedly installed on the top of the path pin, and a V-shaped spring piece is fixedly installed on the top of the stepping push seat, and the V-shaped spring piece is unidirectionally meshed with the helical teeth.

[0010] As a preferred solution of the present invention, two key grooves are provided on the outer wall of the adjusting vertical shaft, and the two key grooves are symmetrically distributed about the center of the adjusting vertical shaft. Two key blocks are fixedly installed on the inner wall of the movable sleeve, and the outer walls of the two key blocks are slidingly connected to the inner walls of the two key grooves. An adapter frame is fixedly installed on the top of the seam-making rock bin, and the movable sleeve is rotatably installed inside the adapter frame through a bearing.

[0011] As a preferred solution of the present invention, two guide rods are fixedly installed between the two bearing seats, the two guide rods are located on both sides of the reciprocating cam, and the outer walls of the two guide rods are slidably installed with guide sleeves, and the top of the guide sleeves is fixedly connected to the bottom of the stepping push seat.

[0012] As a preferred solution of the present invention, the seam-making component also includes two hydraulic cylinders located on the top of the seam-making rock bin, the two hydraulic cylinders are fixedly mounted on the internal frame of the outer frame by bolts, the output rods of the two hydraulic cylinders are movably extended to the interior of the seam-making rock bin, and seam-making cutter heads are fixedly mounted on the bottom of the output rods of the two hydraulic cylinders.

[0013] As a preferred solution of the present invention, an airtight door is rotatably installed at one end of the opening of the slit rock bin, an air supply pipe is fixedly installed at one end of the top of the slit rock bin, and a pressure gauge is fixedly installed at one end of the top of the slit rock bin away from the air supply pipe.

[0014] As a preferred solution of the present invention, the positioning component includes sliding holes opened at the front and rear ends of the left part of the seam-making rock bin and the front and rear ends of the right part of the seam-making rock bin, and positioning rods are slidably installed inside the two front and rear sliding holes, and a positioning plate is fixedly installed at one end of the two positioning rods located inside the seam-making rock bin, and a second return spring is fixedly installed on the outer periphery of the positioning rod, and the second return spring is fixedly installed between the inner wall of the seam-making rock bin and the positioning plate;

[0015] The positioning component also includes a U-shaped push frame fixedly installed on the outer wall of one of the hydraulic cylinder output rods, and two wedge bars distributed front and back are fixedly installed on both sides of the U-shaped push frame, the positions of the wedge bars correspond one to one with the positions of the positioning rods, and the inner walls of the wedge bars abut against the outer ends of the positioning rods, and the front and rear ends of the left and right parts of the seam-making rock warehouse are fixedly installed with sliding seats, and a sliding groove is opened downward through the top of the sliding seat, and the wedge bar is slidably installed inside the sliding groove.

[0016] A fracture-making method of a core fracture-making device with controllable fracture characteristics, comprising the following steps:

[0017] S1. Place the core inside the crack-making rock bin and between the two positioning plates, and close the airtight door;

[0018] S2. The output rods of the two hydraulic cylinders move downward, and the output rod of one of the hydraulic cylinders moves downward to drive the U-shaped push frame and the wedge bar to move downward, so that the wedge bar and the end of the positioning rod generate a wedge force, pushing the positioning rod along the sliding hole to the inside of the joint-making rock bin, and the positioning rod then drives the positioning plate to move, so that the two positioning plates clamp the core to prevent the core from moving during the joint-making process;

[0019] S3, the output rods of the two hydraulic cylinders move downward to push the two seam-making cutter heads to move downward together, applying pressure to the top of the core to construct cracks. At the same time, the output shaft of the servo motor drives the transmission rod to rotate, and the rotation of the transmission rod drives the two vertical push cams to rotate, pushing the two pull bars together with the two hammer rods, the guide rails, the opposing tooth frames, the connecting frame, the shock-absorbing rubber pads, and the hammer upwards. The two first return springs are compressed and stored. Further, under the continuous rotation of the vertical push cams and the rebound force of the first return spring after the guide rail moves upward, the guide rails, the hammer rods, the pull bars, the opposing tooth frames, the connecting frame, the shock-absorbing rubber pads, and the hammers move back and forth up and down. The hammers move back and forth up and down to continuously hammer the top of the core, thereby cooperating with the pressure of the two seam-making cutter heads on the core, making it easier to form cracks;

[0020] S4. The rotation of the transmission rod also drives the reciprocating cam to rotate, and drives the path pin to swing back and forth between the two bearing seats. When the vertical push cam pushes the shift bar upward, the path pin just moves in the direction close to the servo motor, and further drives the V-shaped spring piece to move together through the stepping push seat. During the movement of the V-shaped spring piece in the direction of the servo motor, it is meshed with the helical teeth, and drives the stepping belt to rotate around the driven pulley and the outer periphery of the two tensioning pulleys for a distance. The rotation of the stepping belt further drives the driven pulley and the movable sleeve to rotate. The rotation of the movable sleeve drives the adjusting vertical shaft to rotate together under the torque limiting action of the two key blocks and the two key slots. The rotation of the adjusting vertical shaft drives the incomplete gear to rotate, and the rotation of the incomplete gear is connected with the inner of the opposite tooth frame. The two tooth surfaces of the upper and lower parts mesh alternately, thereby driving the opposite tooth frame to move along the inner wall of the guide rail, and driving the shock-absorbing rubber pad and the hammer to move together through the connecting frame, so as to adjust the position of the hammer to ensure that the hammer will not continuously hammer a certain point on the top of the core, so as to avoid the core internal stress concentration and breakage. And as the transmission rod drives the reciprocating cam to rotate continuously, each time the vertical push cam moves upward, the reciprocating cam will drive the guide sleeve and the V-shaped spring piece to move through the path pin, and the stepping belt will rotate for a certain distance, so that the opposite tooth frame will intermittently reciprocate inside the guide rail, and drive the hammer to move together through the connecting frame and the shock-absorbing rubber pad, and perform linear hammering on the top of the core, making it easier to construct cracks.

[0021] S5. After the core fracture structure is completed, the hydraulic cylinder and the servo motor are turned off, and the air supply pipe of the external air pump injects the air pressure into the interior of the fracture-making rock bin through the air supply pipe. The air pressure inside the fracture-making rock bin is observed by a pressure gauge to test the permeability of the core.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In the present invention, the output rod of the hydraulic cylinder moves downward to push the two slit-making cutter heads to move downward together, so as to apply pressure to the top of the core to construct cracks. At the same time, the output shaft of the servo motor drives the transmission rod to rotate, and the rotation of the transmission rod drives the two vertical push cams to rotate, so as to push the two shifting bars together with the two hammering bars, the guide rail, the opposing tooth frame, the connecting frame, the shock-absorbing rubber pad and the hammer upward. The two first return springs are compressed and stored, and further under the continuous rotation of the vertical push cam and the rebound force of the first return spring after the guide rail moves upward, the guide rail, the hammering bar, the shifting bar, the opposing tooth frame, the connecting frame, the shock-absorbing rubber pad and the hammer move back and forth up and down. The hammer moves back and forth up and down to continuously hammer the top of the core, thereby cooperating with the pressure of the two slit-making cutter heads on the core, making it easier to form cracks and preventing the two slit-making cutter heads from crushing the core.

[0024] 2. In the present invention, the rotation of the transmission rod also drives the reciprocating cam to rotate, driving the path pin to swing back and forth between the two bearing seats. When the vertical push cam pushes the shift bar upward, the path pin just moves in the direction close to the servo motor, and further drives the V-shaped spring piece to move together through the stepping push seat, and drives the stepping belt to rotate around the driven pulley and the outer periphery of the two tensioning pulleys for a distance. The rotation of the stepping belt further drives the driven pulley together with the movable sleeve to rotate. The rotation of the movable sleeve drives the adjusting vertical shaft to rotate a certain angle under the torque limiting action of the two key blocks and the two key slots. The rotation of the adjusting vertical shaft drives the rotation of the incomplete gear. The rotation of the incomplete gear alternately meshes with the two tooth surfaces inside the opposing tooth frame, thereby driving the opposing tooth frame to move along the inner wall of the guide rail, and driving the shock-absorbing rubber pad and the hammer to move together through the connecting frame, so as to adjust the position of the hammer to ensure that the hammer will not continuously hammer on a certain point on the top of the core, so as to avoid stress concentration inside the core and cause breakage.

[0025] 3. In the present invention, the reciprocating cam is driven to rotate continuously by the transmission rod, so that each time the vertical push cam moves upward, the reciprocating cam will drive the guide sleeve and the V-shaped spring piece to move through the path pin, and the stepping belt will rotate for a certain distance, so that the opposing tooth frame will intermittently reciprocate inside the guide rail, and the hammer will be driven to move together through the connecting frame and the shock-absorbing rubber pad, so as to perform linear hammering on the top of the core, making it easier to construct cracks. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the seam-making component and the positioning component in the present invention;

[0028] Figure 3 It is a detailed structural diagram of the positioning component in the present invention;

[0029] Figure 4The detailed structure of the seam-making component in the present invention is shown in FIG. Figure 1 ;

[0030] Figure 5 The detailed structure of the seam-making component in the present invention is shown in FIG. Figure 2 ;

[0031] Figure 6 It is a schematic diagram of the half-section structure of the seam-making rock bin in the present invention;

[0032] Figure 7 It is a schematic diagram of a half-section structure of the guide rail in the present invention;

[0033] Figure 8 It is a schematic diagram of the structure of the opposing gear frame and the incomplete gear in the present invention;

[0034] Fig. 9 It is a schematic diagram of the structure of adjusting the vertical shaft and the keyway in the present invention;

[0035] Fig.10 It is a schematic diagram of the structure of the vertical push cam and the shifting bar in the present invention;

[0036] Fig.11 It is a schematic diagram of the structure of the reciprocating cam and the stepping belt in the present invention;

[0037] Fig.12 It is a schematic diagram of the structure of the path pin and the helical teeth in the present invention.

[0038] In the figure: 100, outer frame; 200, seam-making component; 201, seam-making rock warehouse; 202, hammer rod; 203, guide rail; 204, first return spring; 205, pulley; 206, servo motor; 207, transmission rod; 208, vertical push cam; 209, opposing tooth frame; 2010, connecting frame; 2011, shock-absorbing rubber pad; 2012, hammer; 2013, incomplete gear; 2014, vertical adjustment axis; 2015, keyway; 2016, adapter frame; 2017, movable sleeve; 2018, key block; 2019, driven pulley; 2020, bearing seat; 2021, positioning shaft pin ; 2022, tensioning pulley; 2023, stepping belt; 2024, oblique teeth; 2025, stepping push seat; 2026, V-shaped spring; 2027, path pin; 2028, reciprocating cam; 2029, guide rod; 2030, guide sleeve; 2031, hydraulic cylinder; 2032, suturing knife head; 2033, airtight door; 2034, air supply pipe; 2035, barometer; 300, positioning component; 301, sliding hole; 302, positioning rod; 303, positioning plate; 304, second return spring; 305, sliding seat; 306, slide groove; 307, wedge strip; 308, U-shaped push rack. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0041] See also Figure 1-Figure 12 The technical solution provided by the present invention specifically includes the following embodiments:

[0042] Embodiment 1: A core fracture device with controllable fracture characteristics, comprising an outer frame 100, wherein a fracture component 200 is arranged inside the outer frame 100, wherein the fracture component 200 comprises a fracture rock bin 201 fixedly mounted inside the outer frame 100, wherein two hammer rods 202 are slidably mounted on the top of the fracture rock bin 201, wherein the two hammer rods 202 are movably extended to the inside of the fracture rock bin 201, and wherein the two hammer rods 202 are symmetrically distributed about the central axis of the fracture rock bin 201, wherein a guide rail 203 is fixedly mounted on the bottom of the two hammer rods 202, wherein a first return spring 204 is arranged on the outer periphery of the hammer rod 202, and wherein the first return spring 204 is fixedly mounted on the fracture rock bin 201. 1 and the top of the guide rail 203, the upper parts of the outer walls of the two hammer rods 202 are fixedly installed with a pull bar 205, the top of the seam-making rock warehouse 201 is fixedly installed with two bearing seats 2020, the insides of the two bearing seats 2020 are jointly rotatably installed with a transmission rod 207, the outer wall of the transmission rod 207 is fixedly installed with two vertical push cams 208, the positions of the two vertical push cams 208 correspond to the positions of the two pull bars 205, the inside of the outer frame 100 is fixedly installed with a servo motor 206 through a bracket, the end of the output shaft of the servo motor 206 is fixedly connected to the end of the transmission rod 207 through a coupling, and a hammer 2012 is provided at the bottom of the guide rail 203;

[0043] The seam-making component 200 also includes two hydraulic cylinders 2031 located at the top of the seam-making rock bin 201. The two hydraulic cylinders 2031 are fixedly installed on the inner frame of the outer frame 100 by bolts. The output rods of the two hydraulic cylinders 2031 are both movable and extended to the inside of the seam-making rock bin 201, and the bottoms of the output rods of the two hydraulic cylinders 2031 are both fixedly installed with seam-making cutter heads 2032. An airtight door 2033 is rotatably installed at one end of the opening of the seam-making rock bin 201, an air supply pipe 2034 is fixedly installed at one end of the top of the seam-making rock bin 201, and a pressure gauge 2035 is fixedly installed at one end of the top of the seam-making rock bin 201 away from the air supply pipe 2034.

[0044] Specifically, the core is placed inside the seam-making rock bin 201 and between the two positioning plates 303, the airtight door 2033 is closed, and the output rods of the two hydraulic cylinders 2031 are moved downward to push the two seam-making cutter heads 2032 to move downward together, so as to apply pressure to the top of the core to construct a crack. At the same time, the output shaft of the servo motor 206 drives the transmission rod 207 to rotate, and the rotation of the transmission rod 207 drives the two vertical push cams 208 to rotate, so as to push the two picks 205 together with the two hammer rods 202, the guide rails 203, and the hammer 2012 upward, and the two first return springs 204 are compressed and stored, and further the vertical push cams 208 are continuously pushed. Under the action of rotation and the rebound force of the first return spring 204 after the guide rail 203 moves upward, the guide rail 203, the hammer rod 202, the pull bar 205, and the hammer 2012 move back and forth up and down. The hammer 2012 moves back and forth up and down to continuously hammer the top of the core, thereby cooperating with the pressure of the two seam-making cutter heads 2032 on the core, making it easier to form cracks. After the core crack structure is completed, the hydraulic cylinder 2031 and the servo motor 206 are turned off, and the air supply pipe of the external air pump drives the air pressure into the interior of the seam-making rock bin 201 through the air supply pipe 2034, and the air pressure inside the seam-making rock bin 201 is observed by the barometer 2035 to detect the permeability of the core.

[0045] Embodiment 2: An opposing tooth frame 209 is slidably mounted inside the guide rail 203, a connecting frame 2010 is fixedly mounted at the bottom of the opposite tooth frame 209, two shock-absorbing rubber pads 2011 are fixedly mounted at the bottom of the connecting frame 2010, the two shock-absorbing rubber pads 2011 are symmetrically distributed about the central axis of the connecting frame 2010, and a hammer 212 is fixedly mounted at the bottom of the two shock-absorbing rubber pads 2011;

[0046] An incomplete gear 2013 is provided for the internal rotation of the opposing tooth frame 209, and the incomplete gear 2013 is meshed with the opposing tooth frame 209. An adjusting vertical shaft 2014 is fixedly installed on the inner wall of the incomplete gear 2013. The adjusting vertical shaft 2014 movably penetrates the guide rail 203 and the seam-making rock bin 201, and extends to the top periphery of the seam-making rock bin 201. A movable sleeve 217 is provided on the outer sliding sleeve of the adjusting vertical shaft 2014. A driven pulley 2019 is fixedly installed on the outer wall of the movable sleeve 217. Positioning shaft pins 2021 are fixedly installed on the tops of the two bearing seats 2020. The outer wall is rotatably mounted with a tension pulley 2022, and the outer peripheries of the driven pulley 2019 and the two tension pulleys 2022 are jointly sleeved with a stepping belt 2023, and the bottom of the stepping belt 2023 is provided with a plurality of equally spaced helical teeth 2024, and the outer wall of the transmission rod 207 is fixedly mounted with a reciprocating cam 2028, and a path pin 2027 is slidably mounted in the path groove of the reciprocating cam 2028, and a stepping push seat 2025 is fixedly mounted on the top of the path pin 2027, and a V-shaped spring piece 2026 is fixedly mounted on the top of the stepping push seat 2025, and the V-shaped spring piece 2026 is unidirectionally meshed with the helical teeth 2024;

[0047] Two key slots 2015 are provided on the outer wall of the adjusting vertical shaft 2014, and the two key slots 2015 are symmetrically distributed about the center of the adjusting vertical shaft 2014. Two key blocks 2018 are fixedly installed on the inner wall of the movable sleeve 2017, and the outer walls of the two key blocks 2018 are slidably connected to the inner walls of the two key slots 2015. An adapter frame 2016 is fixedly installed on the top of the seam-making rock warehouse 201, and the movable sleeve 2017 is rotatably installed inside the adapter frame 2016 through a bearing;

[0048] Specifically, in this embodiment, the rotation of the transmission rod 207 also drives the reciprocating cam 2028 to rotate together, driving the path pin 2027 to swing back and forth between the two bearing seats 2020. When the vertical push cam 208 pushes the shift bar 205 upward, the path pin 2027 just moves in the direction close to the servo motor 206, and further drives the V-shaped spring piece 2026 to move together through the stepping push seat 2025. During the movement of the V-shaped spring piece 2026 in the direction of the servo motor 206, it is affected by the helical gear 202 4 meshing action, the stepping belt 2023 is moved to rotate around the driven pulley 2019 and the two tension pulleys 2022 for a distance, the rotation of the stepping belt 2023 further drives the driven pulley 2019 and the movable sleeve 2017 to rotate, the rotation of the movable sleeve 2017 drives the adjusting vertical shaft 214 to rotate together under the torque limiting action of the two key blocks 2018 and the two key slots 2015, the rotation of the adjusting vertical shaft 2014 drives the incomplete gear 2013 to rotate, and the incomplete gear 2013 rotates and alternately meshes with the two tooth surfaces inside the opposite tooth frame 209, thereby driving the opposite tooth frame 209 to move along the inner wall of the guide rail 203, and driving the shock-absorbing rubber pad 2011 and the hammer 2012 to move together through the connecting frame 2010, thereby adjusting the position of the hammer 2012 to ensure that the hammer 2012 does not continuously hammer a certain point on the top of the core, avoiding the stress concentration inside the core and causing the core to break, and as the transmission rod 207 drives the reciprocating cam 2028 to rotate continuously The vertical push cam 208 moves upward each time, and the shift bar 205 and the reciprocating cam 2028 will drive the guide sleeve 2030 and the V-shaped spring piece 2026 to move through the path pin 2027, and the stepping belt 2023 will rotate a certain distance, so that the opposing tooth frame 209 intermittently reciprocates inside the guide rail 203, and drives the hammer 2012 to move together through the connecting frame 2010 and the shock-absorbing rubber pad 2011, and linear hammering is performed on the top of the core, making it easier to construct cracks.

[0049] Furthermore, two guide rods 2029 are fixedly installed between the two bearing seats 2020, and the two guide rods 2029 are located on both sides of the reciprocating cam 2028. The outer walls of the two guide rods 2029 are slidably installed with guide sleeves 2030, and the top of the guide sleeve 2030 is fixedly connected to the bottom of the stepping push seat 2025. By arranging two guide rods 2029 between the two bearing seats 2020 and through the sliding connection between the guide rods 2029 and the guide sleeve 2030, a precise sliding guiding effect can be provided for the path pin 2027, the stepping push seat 2025 and the V-shaped spring piece 2026, thereby ensuring the smoothness and stability of the movement of the V-shaped spring piece 2026, the stepping push seat 2025 and the path pin 2027.

[0050] Embodiment 3: A positioning component 300 is provided inside the seam-making component 200, and the positioning component 300 includes sliding holes 301 opened at the front and rear ends of the left part of the seam-making rock bin 201 and the front and rear ends of the right part of the seam-making rock bin 201, and positioning rods 302 are slidably installed inside the two front and rear sliding holes 301, and a positioning plate 303 is fixedly installed at one end of the two positioning rods 302 located inside the seam-making rock bin 201, and a second return spring 304 is provided on the outer sleeve of the positioning rod 302, and the second return spring 304 is fixedly installed between the inner wall of the seam-making rock bin 201 and the positioning plate 303;

[0051] The positioning component 300 also includes a U-shaped push frame 308 fixedly installed on the outer wall of the output rod of one of the hydraulic cylinders 2031. Two wedge strips 307 distributed front and back are fixedly installed on both sides of the U-shaped push frame 308. The positions of the wedge strips 307 correspond to the positions of the positioning rods 302 one by one, and the inner walls of the wedge strips 307 abut against the outer ends of the positioning rods 302. The front and rear ends of the left and right parts of the seam-making rock bin 201 are fixedly installed with sliding seats 305. A sliding groove 306 is opened downwardly through the top of the sliding seat 305, and the wedge strips 307 are slidably installed inside the sliding groove 306.

[0052] Specifically, in this embodiment, the output rods of the two hydraulic cylinders 2031 move downward, and the output rod of one of the hydraulic cylinders 2031 moves downward to drive the U-shaped push frame 308 and the wedge bar 307 to move downward, so that the wedge bar 307 and the end of the positioning rod 302 generate a wedge force, and the positioning rod 302 is pushed along the sliding hole 301 toward the inside of the seam-making rock bin 201, and the positioning rod 302 then drives the positioning plate 303 to move, so that the two positioning plates 303 clamp the core to prevent the core from moving during the seam-making process.

[0053] A fracture-making method of a core fracture-making device with controllable fracture characteristics, comprising the following steps:

[0054] S1, placing the core inside the crack-making rock bin 201 and between the two positioning plates 303, and closing the airtight door 2033;

[0055] S2. The output rods of the two hydraulic cylinders 2031 move downward, and the output rod of one of the hydraulic cylinders 2031 moves downward to drive the U-shaped push frame 308 and the wedge bar 307 to move downward, so that the wedge bar 307 and the end of the positioning rod 302 generate a wedge force, pushing the positioning rod 302 along the sliding hole 301 into the inside of the seam-making rock bin 201, and the positioning rod 302 then drives the positioning plate 303 to move, so that the two positioning plates 303 clamp the core to prevent the core from moving during the seam-making process;

[0056] S3, the output rods of the two hydraulic cylinders 2031 move downward to push the two seam-making cutter heads 2032 to move downward together, applying pressure to the top of the core to create cracks. At the same time, the output shaft of the servo motor 206 drives the transmission rod 207 to rotate, and the rotation of the transmission rod 207 drives the two vertical push cams 208 to rotate, pushing the two picks 205 together with the two hammer rods 202, the guide rail 203, the opposite tooth frame 209, the connecting frame 2010, the shock-absorbing rubber pad 2011, and the hammer 2012 upward, and the two first return springs 204 are compressed and stored. , further, under the continuous rotation of the vertical push cam 208 and the rebound force of the first return spring 204 after the guide rail 203 moves upward, the guide rail 203, the hammer rod 202, the pull bar 205, the opposing tooth frame 209, the connecting frame 2010, the shock-absorbing rubber pad 2011, and the hammer 2012 move back and forth up and down, and the hammer 2012 moves back and forth up and down to continuously hammer the top of the core, thereby cooperating with the pressure of the two seam-making cutter heads 2032 on the core, making it easier to form cracks and preventing the two seam-making cutter heads 2032 from crushing the core;

[0057] S4. The rotation of the transmission rod 207 also drives the reciprocating cam 2028 to rotate together, driving the path pin 2027 to swing back and forth between the two bearing seats 2020. When the vertical push cam 208 pushes the shift bar 205 upward, the path pin 2027 just moves in the direction close to the servo motor 206, and further drives the V-shaped spring piece 2026 to move together through the stepping push seat 2025. When the V-shaped spring piece 2026 moves in the direction of the servo motor 206, it is meshed with the helical teeth 2024. The stepping belt 2023 is driven to rotate around the driven pulley 2019 and the two tension pulleys 2022 for a distance. The rotation of the stepping belt 2023 further drives the driven pulley 2019 and the movable sleeve 2017 to rotate. The rotation of the movable sleeve 2017 drives the adjusting vertical shaft 214 to rotate together under the torque limiting action of the two key blocks 2018 and the two key slots 2015. The rotation of the adjusting vertical shaft 2014 drives the incomplete gear 2013 to rotate. The incomplete gear 2013 is rotated. 13 rotates and alternately meshes with the two tooth surfaces inside the opposite tooth frame 209, thereby driving the opposite tooth frame 209 to move along the inner wall of the guide rail 203, and driving the shock-absorbing rubber pad 2011 and the hammer 2012 to move together through the connecting frame 2010, thereby adjusting the position of the hammer 2012 to ensure that the hammer 2012 does not continuously hammer a certain point on the top of the core, avoiding the stress concentration inside the core and causing the core to break, and as the transmission rod 207 drives the reciprocating cam 2028 to rotate continuously , so that each time the vertical push cam 208 moves the shift bar 205 upward, the reciprocating cam 2028 will drive the guide sleeve 2030 and the V-shaped spring piece 2026 to move through the path pin 2027, and the stepping belt 2023 will rotate for a certain distance, so that the opposite tooth frame 209 will intermittently reciprocate inside the guide rail 203, and drive the hammer 2012 to move together through the connecting frame 2010 and the shock-absorbing rubber pad 211, and perform linear hammering on the top of the core, making it easier to construct cracks;

[0058] S5. After the core fracture structure is completed, the hydraulic cylinder 2031 and the servo motor 206 are closed, and the air supply pipe of the external air pump injects the air pressure into the interior of the fracture rock bin 201 through the air supply pipe 2034. The air pressure inside the fracture rock bin 201 is observed through the barometer 2035 to detect the permeability of the core.

[0059] In the present invention, a core seam-making device with controllable crack characteristics is used. When the core is in operation, the core is placed inside the seam-making rock bin 201 and between the two positioning plates 303. The airtight door 2033 is closed, and the output rods of the two hydraulic cylinders 2031 are moved downward. The output rod of one of the hydraulic cylinders 2031 moves downward to drive the U-shaped push frame 308 and the wedge bar 307 to move downward, so that the wedge bar 307 and the end of the positioning rod 302 generate a wedge force, and the positioning rod 302 is pushed along the sliding hole 301 to the inside of the seam-making rock bin 201. The positioning rod 302 then drives the positioning plate 303 to move, so that the two positioning plates 303 clamp the core to prevent the core from moving during the seam-making process.

[0060] The output rods of the two hydraulic cylinders 2031 move downward, pushing the two seam-making cutter heads 2032 to move downward together, applying pressure to the top of the core to create cracks. At the same time, the output shaft of the servo motor 206 drives the transmission rod 207 to rotate, and the rotation of the transmission rod 207 drives the two vertical push cams 208 to rotate, pushing the two picks 205 together with the two hammer rods 202, the guide rail 203, the opposite tooth frame 209, the connecting frame 2010, the shock-absorbing rubber pad 2011, and the hammer 2012 upward, and the two first return springs 204 are compressed and stored. Further, under the continuous rotation of the vertical push cam 208 and the rebound force of the first return spring 204 after the guide rail 203 moves upward, the guide rail 203, the hammer rod 202, the pull bar 205, the opposing tooth frame 209, the connecting frame 2010, the shock-absorbing rubber pad 2011, and the hammer 2012 move back and forth up and down. The hammer 2012 moves back and forth up and down to continuously hammer the top of the core, thereby cooperating with the pressure of the two seam-making cutter heads 2032 on the core, making it easier to form cracks and preventing the two seam-making cutter heads 2032 from crushing the core.

[0061] The rotation of the transmission rod 207 also drives the reciprocating cam 2028 to rotate together, driving the path pin 2027 to swing back and forth between the two bearing seats 2020. When the vertical push cam 208 pushes the pick 205 upward, the path pin 2027 just moves in the direction close to the servo motor 206, and further drives the V-shaped spring piece 2026 to move together through the stepping push seat 2025. The V-shaped spring piece 2026 is meshed with the helical teeth 224 while moving in the direction of the servo motor 206. , the stepping belt 2023 is driven to rotate around the driven pulley 2019 and the two tensioning pulleys 2022 for a distance, the rotation of the stepping belt 2023 further drives the driven pulley 2019 and the movable sleeve 2017 to rotate, the rotation of the movable sleeve 2017 drives the adjusting vertical shaft 2014 to rotate together under the torque limiting action of the two key blocks 2018 and the two key slots 2015, the rotation of the adjusting vertical shaft 2014 drives the incomplete gear 2013 to rotate, and the incomplete gear 2013 The two tooth surfaces inside the rotating and opposing tooth frame 209 are alternately meshed, thereby driving the opposing tooth frame 209 to move along the inner wall of the guide rail 203, and driving the shock-absorbing rubber pad 2011 and the hammer 2012 to move together through the connecting frame 2010, thereby adjusting the position of the hammer 2012 to ensure that the hammer 2012 does not continuously hammer a certain point on the top of the core, avoiding the stress concentration inside the core and causing the core to break. As the transmission rod 207 drives the reciprocating cam 2028 to rotate continuously, Each time the vertical push cam 208 moves the pull bar 205 and the reciprocating cam 2028 upward, the guide sleeve 2030 and the V-shaped spring piece 2026 are driven to move through the path pin 2027, and the stepping belt 2023 is driven to rotate for a certain distance, so that the opposite tooth frame 209 intermittently reciprocates inside the guide rail 203, and the hammer 2012 is driven to move together through the connecting frame 2010 and the shock-absorbing rubber pad 211, and linear hammering is performed on the top of the core, making it easier to construct cracks;

[0062] After the core fracture structure is completed, the hydraulic cylinder 2031 and the servo motor 206 are closed, and the air supply pipe of the external air pump injects the air pressure into the interior of the fracture rock bin 201 through the air supply pipe 2034, and the air pressure inside the fracture rock bin 201 is observed through the barometer 2035 to detect the permeability of the core.

[0063] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A core fracture creation device with controllable fracture characteristics, characterized in that: including an outer frame (100); A seam-making component (200), wherein the outer frame (100) is provided with the seam-making component (200), and the seam-making component (200) is used for seam-making in rock cores, and the seam-making component (200) comprises a seam-making rock bin (201) fixedly installed inside the outer frame (100), and two hammer rods (202) are slidably installed on the top of the seam-making rock bin (201), and the two hammer rods (202) are movably extended into the interior of the seam-making rock bin (201), and the two hammer rods (202) are symmetrically distributed about the central axis of the seam-making rock bin (201), and the bottoms of the two hammer rods (202) are fixedly installed with a guide rail (203), and the outer sleeve of the hammer rod (202) is provided with a first return spring (203). 4), the first return spring (204) is fixedly mounted between the top wall of the seam-making rock bin (201) and the top of the guide rail (203), the upper parts of the outer walls of the two hammer rods (202) are fixedly mounted with a shifting bar (205), the top of the seam-making rock bin (201) is fixedly mounted with two bearing seats (2020), the interiors of the two bearing seats (2020) are jointly rotatably mounted with a transmission rod (207), the outer wall of the transmission rod (207) is fixedly mounted with two vertical push cams (208), the positions of the two vertical push cams (208) correspond one to one with the positions of the two shifting bars (205), the interior of the outer frame (100) is fixedly mounted with a servo motor (206) via a bracket, the servo motor (206) The end of the output shaft of the motor (206) is fixedly connected to the end of the transmission rod (207) via a coupling; a hammer (212) is provided at the bottom of the guide rail (203); an opposing tooth frame (209) is slidably mounted inside the guide rail (203); a connecting frame (210) is fixedly mounted at the bottom of the opposing tooth frame (209); two shock-absorbing rubber pads (211) are fixedly mounted at the bottom of the connecting frame (210); the two shock-absorbing rubber pads (211) are symmetrically distributed about the central axis of the connecting frame (210); the hammer (212) is fixedly mounted at the bottom of the two shock-absorbing rubber pads (211); an incomplete gear (213) is rotatably mounted inside the opposing tooth frame (209) ), the incomplete gear (2013) is meshed with the opposing tooth frame (209), an adjusting vertical shaft (2014) is fixedly mounted on the inner wall of the incomplete gear (2013), the adjusting vertical shaft (2014) movably penetrates the guide rail (203) and the seam-making rock bin (201), and extends to the top periphery of the seam-making rock bin (201), the outer peripheral sliding sleeve of the adjusting vertical shaft (2014) is provided with a movable sleeve (217), the outer wall of the movable sleeve (2017) is fixedly mounted with a driven pulley (219), the tops of the two bearing seats (2020) are fixedly mounted with positioning shaft pins (221), and the outer walls of the positioning shaft pins (221) are rotatably mounted with tensioning pulleys (222),The outer peripheries of the driven pulley (2019) and the two tension pulleys (2022) are jointly sleeved with a stepping belt (2023); the bottom of the stepping belt (2023) is provided with a plurality of equally spaced helical teeth (2024); a reciprocating cam (2028) is fixedly mounted on the outer wall of the transmission rod (207); a path pin (2027) is slidably mounted in the path groove of the reciprocating cam (2028); a stepping push seat (2025) is fixedly mounted on the top of the path pin (2027); and a V-shaped spring piece (2026) is fixedly mounted on the top of the stepping push seat (2025). The V-shaped spring piece (2026) is unidirectionally meshed with the bevel gear (2024); the outer wall of the adjusting vertical shaft (2014) is provided with two keyways (2015); the two keyways (2015) are symmetrically distributed about the center of the adjusting vertical shaft (2014); the inner wall of the movable sleeve (2017) is fixedly provided with two key blocks (2018); the outer walls of the two key blocks (2018) are slidably connected to the inner walls of the two keyways (2015); the top of the seam-making rock bin (201) is fixedly provided with an adapter frame (2016); the movable sleeve (2017) is rotatably mounted via a bearing. Mounted inside the adapter frame (2016), two guide rods (2029) are fixedly installed between the two bearing seats (2020), the two guide rods (2029) are located on both sides of the reciprocating cam (2028), the outer walls of the two guide rods (2029) are slidably mounted with guide sleeves (2030), the top of the guide sleeves (2030) is fixedly connected to the bottom of the stepping push seat (2025), and the seam-making component (200) also includes two hydraulic cylinders (2031) located at the top of the seam-making rock bin (201), and the two hydraulic cylinders (2031) are connected by screws. The bolt is fixedly mounted on the inner frame of the outer frame (100), the output rods of the two hydraulic cylinders (2031) are movably extended to the inside of the seam-making rock bin (201), and the bottoms of the output rods of the two hydraulic cylinders (2031) are fixedly mounted with seam-making cutter heads (2032), an airtight door (2033) is rotatably mounted on one end of the opening of the seam-making rock bin (201), an air supply pipe (2034) is fixedly mounted on one end of the top of the seam-making rock bin (201), and a pressure gauge (2035) is fixedly mounted on one end of the top of the seam-making rock bin (201) away from the air supply pipe (2034); A positioning component (300) is provided inside the seam-making component (200), and the positioning component (300) is used for core positioning.

2. A core fracture creation device with controllable fracture characteristics according to claim 1, characterized in that: The positioning component (300) comprises sliding holes (301) provided at the front and rear ends of the left part of the joint-making rock bin (201) and the front and rear ends of the right part of the joint-making rock bin (201), positioning rods (302) are slidably installed inside the two sliding holes (301) distributed front and back, and a positioning plate (303) is fixedly installed at one end of the two positioning rods (302) located inside the joint-making rock bin (201), and a second return spring (304) is sleeved on the outer periphery of the positioning rod (302), and the second return spring (304) is fixedly installed between the inner wall of the joint-making rock bin (201) and the positioning plate (303); The positioning component (300) further comprises a U-shaped push frame (308) fixedly mounted on the outer wall of an output rod of one of the hydraulic cylinders (2031), two wedge bars (307) distributed front and rear being fixedly mounted on both sides of the U-shaped push frame (308), the positions of the wedge bars (307) corresponding to the positions of the positioning rods (302) one by one, and the inner walls of the wedge bars (307) abut against the outer ends of the positioning rods (302), the front and rear ends of the left part of the seam-making rock bin (201) and the front and rear ends of the right part of the seam-making rock bin (201) are fixedly mounted with sliding seats (305), a sliding groove (306) is provided through the top of the sliding seat (305) and is downwardly penetrated, and the wedge bars (307) are slidably mounted inside the sliding groove (306).

3. The method for making fractures in a core fracture making device with controllable fracture characteristics according to claim 2, characterized in that: The usage steps include the following: S1, placing the core inside the fracture rock chamber (201) and between the two positioning plates (303), and closing the airtight door (2033); S2. The output rods of the two hydraulic cylinders (2031) are moved downward, and the output rod of one of the hydraulic cylinders (2031) is moved downward to drive the U-shaped push frame (308) and the wedge bar (307) to move downward, so that the wedge bar (307) and the end of the positioning rod (302) generate a wedge force, and the positioning rod (302) is pushed along the sliding hole (301) toward the inside of the joint-making rock bin (201). The positioning rod (302) then drives the positioning plate (303) to move, so that the two positioning plates (303) clamp the core, thereby preventing the core from moving during the joint-making process; S3, the output rods of the two hydraulic cylinders (2031) move downward to push the two seam-making cutter heads (2032) to move downward together, applying pressure to the top of the core to create a crack. At the same time, the output shaft of the servo motor (206) drives the transmission rod (207) to rotate, and the rotation of the transmission rod (207) drives the two vertical push cams (208) to rotate, pushing the two picks (205) together with the two hammer rods (202), the guide rail (203), the opposing tooth frame (209), the connecting frame (2010), the shock-absorbing rubber pad (2011), and the hammer (2012) upward, and the two first reset springs The spring (204) is compressed and stores force, and further, under the continuous rotation of the vertical push cam (208) and the rebound force of the first return spring (204) after the guide rail (203) moves upward, the guide rail (203), the hammer rod (202), the pull bar (205), the opposing tooth frame (209), the connecting frame (2010), the shock-absorbing rubber pad (2011), and the hammer (2012) move back and forth up and down, and the hammer (2012) moves back and forth up and down to continuously hammer the top of the core, thereby cooperating with the pressure of the two seam-making cutter heads (2032) on the core, making it easier to form cracks; S4. The rotation of the transmission rod (207) also drives the reciprocating cam (2028) to rotate together, driving the path pin (2027) to swing back and forth between the two bearing seats (2020). When the vertical push cam (208) pushes the shift bar (205) upward, the path pin (2027) just moves in the direction close to the servo motor (206), and further drives the V-shaped spring piece (226) to move together through the stepping push seat (225). When the V-shaped spring piece (2026) moves in the direction of the servo motor (206), it is affected by the helical teeth (224). The meshing action drives the stepping belt (2023) to rotate around the outer periphery of the driven pulley (2019) and the two tension pulleys (2022) for a distance. The rotation of the stepping belt (2023) further drives the driven pulley (2019) and the movable sleeve (2017) to rotate. The rotation of the movable sleeve (2017) drives the adjusting vertical shaft (2014) to rotate together under the torque limiting action of the two key blocks (2018) and the two key slots (2015). The rotation of the adjusting vertical shaft (2014) drives the incomplete gear (2013) to rotate. (2013) rotates and alternately meshes with the two tooth surfaces inside the opposing tooth frame (209), thereby driving the opposing tooth frame (209) to move along the inner wall of the guide rail (203), and driving the shock-absorbing rubber pad (211) and the hammer (212) to move together through the connecting frame (2010), thereby adjusting the position of the hammer (2012) to ensure that the hammer (2012) does not continuously hammer a certain point on the top of the core, avoiding stress concentration inside the core and causing it to break, and as the transmission rod (207) drives the reciprocating cam (228) to rotate continuously , so that each time the vertical push cam (208) moves the shift bar (205) and the reciprocating cam (2028) upward, the guide sleeve (2030) and the V-shaped spring sheet (2026) are driven to move through the path pin (2027), and the stepping belt (2023) is driven to rotate a certain distance, so that the opposing tooth frame (209) intermittently reciprocates inside the guide rail (203), and the hammer (212) is driven to move together through the connecting frame (2010) and the shock-absorbing rubber pad (211), so as to perform linear hammering on the top of the core, making it easier to construct cracks; S5. After the core fracture structure is completed, the hydraulic cylinder (2031) and the servo motor (206) are closed, and the air supply pipe of the external air pump injects air pressure into the interior of the fracture-forming rock bin (201) through the air supply pipe (2034). The air pressure inside the fracture-forming rock bin (201) is observed through the pressure gauge (2035) to detect the permeability of the core.

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