CN110631923B - True triaxial high-pressure water fracturing-gas seepage simulation experiment device and method thereof - Google Patents
True triaxial high-pressure water fracturing-gas seepage simulation experiment device and method thereof Download PDFInfo
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- CN110631923B CN110631923B CN201910943225.3A CN201910943225A CN110631923B CN 110631923 B CN110631923 B CN 110631923B CN 201910943225 A CN201910943225 A CN 201910943225A CN 110631923 B CN110631923 B CN 110631923B
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- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
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- G01N2203/0019—Compressive
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0244—Tests performed "in situ" or after "in situ" use
- G01N2203/0246—Special simulation of "in situ" conditions, scale models or dummies
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
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Abstract
The invention discloses a true triaxial high-pressure water fracturing-gas seepage simulation experiment device.A four corners of the lower side of a fixed plate are fixedly provided with four supporting legs, a moving mechanism is respectively arranged between two left and right opposite supporting legs, the lower side of the fixed plate is fixedly provided with a pressurizing chamber, a telescopic column of a hydraulic cylinder is hinged with a cover plate, an electric telescopic rod is hinged between the left side and an upper working surface of the telescopic column of the hydraulic cylinder, a first pushing mechanism is arranged between the two supporting legs on the right side, and a second pushing mechanism is arranged between the two supporting legs on the left side; drive the apron through pneumatic cylinder extension and descend to ground, through first pushing mechanism with sample propelling movement to the last working face of apron on, then drive through the pneumatic cylinder shrink and lap rising and drive the sample and get into and simulate the pressurization experiment in the pressurized chamber, perhaps the experiment finishes the back and promotes the sample after the experiment through second pushing mechanism right and make the sample after the experiment break away from the apron, need not artifical transport sample, degree of mechanization is high, the experimental efficiency is high.
Description
Technical Field
The invention relates to the field of true triaxial experiment devices, in particular to a true triaxial high-pressure water fracturing-gas seepage simulation experiment device and a method thereof.
Background
The hydraulic fracturing technology is developed in nearly half a century, is mature, is a main form for exploiting natural gas, and has great value in solving the gas extraction problem. Current true triaxial hydraulic fracturing experimental facilities, degree of mechanization is low, needs to consume very big manpower installation and dismantlement test piece, has increased user of service's work load, has reduced experimental efficiency.
Disclosure of Invention
The invention aims to solve the technical problem of providing a true triaxial high-pressure water fracturing-gas seepage simulation experiment device and a true triaxial high-pressure water fracturing-gas seepage simulation experiment method, which are used for reducing the workload of users and improving the experiment efficiency so as to solve the problems in the background technology.
In order to solve the technical problems, the technical scheme of the invention is as follows: a true triaxial high-pressure water fracturing-gas seepage simulation experiment device comprises a fixed plate, wherein four support legs are fixedly arranged at four corners of the lower side of the fixed plate, and moving mechanisms are respectively arranged between the left support leg and the right support leg which are opposite; a pressurizing chamber is fixedly arranged at the lower side of the fixing plate, the pressurizing chamber is a rectangular box body with an opening at the lower end, and pressurizing cylinders are respectively arranged on the right side, the rear side and the upper side of the pressurizing chamber; two hydraulic cylinders extending downwards are fixedly mounted on the lower side of the fixing plate, the two hydraulic cylinders are oppositely arranged on the front side and the rear side of the pressurizing chamber, a cover plate used for sealing the lower end of the pressurizing chamber is hinged to telescopic columns of the two hydraulic cylinders, and the rotating axis of the cover plate extends forwards and backwards; the cover plate is provided with an upper working surface and a lower working surface, the upper working surface and the lower working surface extend rightwards and intersect to form an acute angle, the lower end of a telescopic column of the hydraulic cylinder is hinged to the upper working surface, and an electric telescopic rod for driving the cover plate to rotate is hinged between the left side of the telescopic column of the hydraulic cylinder and the upper working surface; two that are located the right side are equipped with first push mechanism between the supporting leg, are located left two be equipped with second push mechanism between the supporting leg.
As a preferable technical scheme, the first pushing mechanism comprises two slide ways positioned at the inner sides of the two support legs at the right side, and the slide ways extend vertically; a moving plate is arranged between the two slideways in a vertically sliding mode, a first electric push rod extending leftwards is fixedly arranged on the moving plate, and a first push plate is fixedly arranged at the left end of the first electric push rod; and a driving mechanism for driving the movable plate to move up and down is further arranged in the slide way.
As the preferred technical scheme, actuating mechanism includes fixed mounting drive motor in the slide, coaxial fixed mounting has the threaded rod of vertical extension on drive motor's the axis of rotation, the movable plate around both ends respectively close soon correspondingly on the threaded rod.
Preferably, the second pushing mechanism includes a fixing plate fixedly installed between the two left support legs, the fixing plate is located below the pressurizing chamber, a second electric push rod extending rightward is fixedly installed on the fixing plate, and a second push plate is fixedly installed at a right end of the second electric push rod.
As a preferable technical scheme, the moving mechanism comprises an installation plate fixedly installed between two left and right opposite support legs, and the lower end of the installation plate is fixedly provided with a moving wheel; a connecting plate is fixedly installed on the outer side of the mounting plate, a through groove extending vertically is formed in the connecting plate, a supporting plate is installed in the through groove in a vertically sliding mode, and a supporting block located below the connecting plate is fixedly installed at the lower end of the supporting plate; and the mounting plate is also provided with a linkage mechanism for driving the supporting plate to move up and down.
As a preferred technical solution, the linkage mechanism includes a mounting groove located at an outer side of the mounting plate, the mounting groove is located above the connecting plate, a horizontal shaft extending left and right is fixedly mounted in the mounting groove, a rotating sleeve is rotatably mounted at an outer side of the horizontal shaft, and a swing arm is fixedly mounted on the rotating sleeve; two auxiliary plates are oppositely and fixedly arranged at the left and right sides of the upper end of the supporting plate, a small shaft extending left and right is fixedly arranged between the two auxiliary plates, and a waist hole matched with the small shaft is formed in the swing arm; a mounting cavity is arranged in the swing arm, the mounting cavity is provided with a through hole which extends towards the transverse shaft and penetrates through the rotating sleeve, a locking pin is movably mounted in the through hole, a locking groove matched with the locking pin is formed in the transverse shaft, and when the locking pin is inserted into the locking groove, the supporting block abuts against the ground and enables the moving wheel to be separated from the ground; the locking pin is kept away from the one end fixed mounting of cross axle has the dog, the dog is kept away from one side of cross axle with be equipped with first spring between the installation cavity, the dog with fixed mounting has the shifting block on the adjacent side of locking pin, the swing arm with shifting block relevant position department is equipped with the rectangular hole, the shifting block is followed the rectangular hole stretches out to the outside of swing arm can follow the rectangular hole removes.
As a further improvement, a force-assisted grip is fixedly arranged on the connecting plate.
As a further improvement, a baffle plate positioned above the connecting plate is fixedly arranged on the supporting plate, and a second spring is arranged between the baffle plate and the connecting plate.
An experimental method using the true triaxial high-pressure water fracturing-gas seepage simulation experimental device comprises the following steps:
s1, moving the true triaxial high-pressure water fracturing-gas seepage simulation experiment device through a moving mechanism to enable the sample to be located between the pressurizing chamber and the first pushing mechanism;
s2, the cover plate is driven to descend by the hydraulic cylinder to enable the lower working surface to be attached to the ground, and the cover plate is driven to rotate by the electric telescopic rod in the process until the lower working surface is in a horizontal state;
s3, pushing the sample onto the cover plate by the first pushing mechanism;
s4, the hydraulic cylinder drives the cover plate to ascend so that the upper working surface closes the lower end of the pressurizing chamber, the cover plate drives the sample to enter the pressurizing chamber, and the electric telescopic rod drives the cover plate to rotate until the upper working surface is in a horizontal state in the process;
s5, pressurizing the sample by simulating the formation stress through the pressurizing chamber and recording experimental data;
s6, the hydraulic cylinder drives the cover plate to descend to enable the lower working surface to be attached to the ground, the cover plate drives the sample after the experiment to move out of the pressure chamber, and the electric telescopic rod drives the cover plate to rotate until the lower working surface is in a horizontal state;
and S7, pushing the sample after the experiment to be separated from the cover plate through the second pushing mechanism.
By adopting the technical scheme, the true triaxial high-pressure water fracturing-gas seepage simulation experiment device comprises a fixed plate, four support legs are fixedly mounted at four corners of the lower side of the fixed plate, a moving mechanism is respectively arranged between the two support legs which are opposite to each other left and right, a pressure chamber is fixedly mounted at the lower side of the fixed plate, a cover plate for sealing the lower end of the pressure chamber is hinged to telescopic columns of two hydraulic cylinders, an upper working surface and a lower working surface extend rightwards and are intersected to form an acute angle, an electric telescopic rod for driving the cover plate to rotate is hinged between the left side of the telescopic column of the hydraulic cylinder and the upper working surface, a first pushing mechanism is arranged between the two support legs on the right side, and a second pushing mechanism is arranged between the two support legs on the left side; when the cover plate is driven to descend to the ground by the extension of the hydraulic cylinder, the sample is pushed to the upper working surface of the cover plate by the first pushing mechanism, then the cover plate is driven to ascend by the contraction of the hydraulic cylinder to drive the sample to enter the pressurizing chamber for a simulated pressurizing experiment, or after the experiment is finished, the sample after the experiment is pushed rightwards by the second pushing mechanism to separate the sample from the cover plate, the sample does not need to be manually carried, the degree of mechanization is high, and the experiment efficiency is high; when the hydraulic cylinder extends to drive the cover plate to descend to the ground, the lower working surface is attached to the ground, the upper working surface is in an inclined state, the right end of the upper working surface is bordered by the ground, the upper working surface and the lower working surface extend rightwards and intersect to form an acute angle, when the first pushing mechanism pushes a sample to the cover plate leftwards, the bottom of the sample is conveniently shoveled through the acute angle at the right end of the cover plate, and therefore the first pushing mechanism pushes the sample to the upper working surface of the cover plate; the invention is convenient to insert the locking pin into the locking groove by rotating the swing arm downwards, the swing arm drives the supporting block to abut against the ground and enables the moving wheel to be separated from the ground so as to improve the stability of the whole device, or drives the locking pin to be separated from the locking groove by stirring the shifting block, and then rotates the swing arm upwards to enable the supporting block to move upwards to be separated from the ground and enable the moving wheel to be in contact with the ground so as to improve the mobility of the whole device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic mechanism diagram of a first pushing mechanism for pushing a sample to a cover plate according to an embodiment of the present invention;
FIG. 3 is a schematic right-side view of FIG. 2;
FIG. 4 is an enlarged view of a portion I of FIG. 3;
FIG. 5 is a schematic view of the swing arm of an embodiment of the present invention in an upward pivot configuration;
FIG. 6 is an experimental flow chart of an embodiment of the present invention.
In the figure: 1-fixing the plate; 2-supporting legs; 3-a pressurized chamber; 4-a pressurized cylinder; 5-a hydraulic cylinder; 6-cover plate; 601-upper working surface; 602-lower working face; 7-an electric telescopic rod; 8-a slideway; 9-moving the board; 10-a first electric push rod; 11-a first push plate; 12-a drive motor; 13-a threaded rod; 14-a fixed plate; 15-a second electric push rod; 16-a second pusher plate; 17-mounting a plate; 18-a moving wheel; 19-a connecting plate; 20-through grooves; 21-a support plate; 22-a support block; 23-mounting grooves; 24-horizontal axis; 25-rotating the sleeve; 26-a swing arm; 27-an auxiliary plate; 28-minor axis; 29-waist hole; 30-mounting a cavity; 31-a through hole; 32-a locking pin; 33-locking groove; 34-a stop; 35-a first spring; 36-a shifting block; 37-elongated holes; 38-a power assist grip; 39-a baffle; 40-a second spring; 41-sample.
Detailed Description
As shown in fig. 1 to 5, a true triaxial high-pressure water fracturing-gas seepage simulation experiment device comprises a fixing plate 1, four support legs 2 are fixedly installed at four corners of the lower side of the fixing plate 1, and a moving mechanism is respectively arranged between the two support legs 2 which are opposite to each other at the left and right; a pressurizing chamber 3 is fixedly arranged at the lower side of the fixed plate 1, the pressurizing chamber 3 is a rectangular box body with an opening at the lower end, and pressurizing cylinders 4 are respectively arranged on the right side, the rear side and the upper side of the pressurizing chamber 3; two hydraulic cylinders 5 extending downwards are fixedly mounted on the lower side of the fixed plate 1, the two hydraulic cylinders 5 are oppositely arranged on the front side and the rear side of the pressurized chamber 3, a cover plate 6 used for sealing the lower end of the pressurized chamber 3 is hinged to telescopic columns of the two hydraulic cylinders 5, and the rotating axis of the cover plate 6 extends forwards and backwards; the cover plate 6 is provided with an upper working surface 601 and a lower working surface 602, the upper working surface 601 and the lower working surface 602 extend rightwards and intersect to form an acute angle, the lower end of a telescopic column of the hydraulic cylinder 5 is hinged on the upper working surface 601, and an electric telescopic rod 7 for driving the cover plate 6 to rotate is hinged between the left side of the telescopic column of the hydraulic cylinder 5 and the upper working surface 601; two that are located the right side be equipped with first push mechanism between the supporting leg 2, first push mechanism is used for promoting sample 41 to apron 6 on, is located left two be equipped with second push mechanism between the supporting leg 2, second push mechanism is used for promoting sample 41 and breaks away from apron 6.
When in use, the sample 41 is placed on the ground, the device is moved by the moving mechanism to position the sample 41 between the pressurizing chamber 3 and the first pushing mechanism, the hydraulic cylinder 5 extends to drive the cover plate 6 to descend so as to open the lower end of the pressure chamber 3, the electric telescopic rod 7 contracts to drive the cover plate 6 to rotate clockwise in the descending process of the cover plate 6, so that the lower working surface 602 rotates to the horizontal state, so that when the hydraulic cylinder 5 extends to drive the cover plate 6 to descend to the ground, the lower working surface 602 is attached to the ground, as shown in fig. 2, the upper working surface 601 is inclined, the right end of the upper working surface 601 is adjacent to the ground, the upper working surface 601 and the lower working surface 602 extend to the right and intersect to form an acute angle, when the first pushing mechanism pushes the sample 41 to the cover plate 6 leftwards, the bottom of the sample 41 is conveniently scooped up by the acute angle at the right end of the cover plate 6, so that the first pushing mechanism pushes the sample 41 to the upper working surface 601 of the cover plate 6.
After the first pushing mechanism pushes the sample 41 to the cover plate 6, the cover plate 6 is driven to rise through contraction of the hydraulic cylinder 5 to lift the sample 41, the cover plate 6 is driven to rotate anticlockwise through extension of the electric telescopic rod 7 in the rising process of the cover plate 6, the upper working face 601 is enabled to rotate to be in a horizontal state, the hydraulic cylinder 5 continues to contract to drive the cover plate 6 to rise until the hydraulic cylinder 5 drives the cover plate 6 to rise to the upper working face 601 to seal the lower end of the pressurizing chamber 3, meanwhile, the cover plate 6 drives the sample 41 to enter the pressurizing chamber 3, and the pressurizing chamber 3 can simulate and pressurize the sample 41.
After the experiment is finished, the hydraulic cylinder 5 is extended to drive the cover plate 6 to descend so as to open the lower end of the pressurizing chamber 3, the cover plate 6 drives the sample 41 after the experiment to move out of the pressurizing chamber 3, the cover plate 6 is contracted by the electric telescopic rod 7 in the descending process to drive the cover plate 6 to rotate clockwise, the lower working surface 602 is rotated to a horizontal state until the hydraulic cylinder 5 is extended to drive the cover plate 6 to descend to the ground, and then the second pushing mechanism is used for pushing the sample 41 after the experiment rightwards so as to separate the sample 41 after the experiment from the cover plate 6.
The first pushing mechanism comprises two slide ways 8 positioned on the inner sides of the two support legs 2 on the right side, and the slide ways 8 extend vertically; a moving plate 9 is vertically and slidably mounted between the two slideways 8, a first electric push rod 10 extending leftwards is fixedly mounted on the moving plate 9, and a first push plate 11 is fixedly mounted at the left end of the first electric push rod 10; and a driving mechanism for driving the moving plate 9 to move up and down is further arranged in the slide way 8.
Specifically, actuating mechanism includes fixed mounting and is in driving motor 12 in the slide 8, coaxial fixed mounting has vertical extension's threaded rod 13 in driving motor 12's the axis of rotation, both ends are closed respectively soon correspondingly around the movable plate 9 on the threaded rod 13.
When the device is moved, the driving motor 12 drives the threaded rod 13 to rotate forwards, and the threaded rod 13 rotates forwards to drive the moving plate 9 to ascend, so that the moving plate 9 is prevented from preventing the sample 41 from entering between the pressurizing chamber 3 and the first pushing mechanism; after the device is moved to enable the sample 41 to be located between the pressurizing chamber 3 and the first pushing mechanism, the driving motor 12 drives the threaded rod 13 to rotate reversely, the threaded rod 13 drives the moving plate 9 to descend when rotating reversely, until the moving plate 9 descends, the first push plate 11 is aligned with the right side of the sample 41, then the moving plate is extended through the first electric push rod 10, the first electric push rod 10 drives the first push plate 11 to move leftwards, and the first push plate 11 pushes the sample 41 to move leftwards to the cover plate 3.
The second pushing mechanism comprises a fixed plate 14 fixedly installed between the two left supporting legs 2, the fixed plate 14 is located below the pressurizing chamber 3, a second electric push rod 15 extending rightwards is fixedly installed on the fixed plate 14, and a second push plate 16 is fixedly installed at the right end of the second electric push rod 15.
The second electric push rod 15 extends, the second electric push rod 15 drives the second push plate 16 to move rightwards, and the second push plate 16 pushes the tested sample 41 on the cover plate 6 to move rightwards, so that the tested sample 41 is separated from the cover plate 6.
The moving mechanism comprises an installation plate 17 fixedly installed between two left and right opposite supporting legs 2, and the lower end of the installation plate 17 is fixedly provided with a moving wheel 18; a connecting plate 19 is fixedly installed on the outer side of the mounting plate 17, a through groove 20 extending vertically is formed in the connecting plate 19, a supporting plate 21 is installed in the through groove 20 in a vertically sliding mode, and a supporting block 22 located below the connecting plate 19 is fixedly installed at the lower end of the supporting plate 21; the mounting plate 17 is further provided with a linkage mechanism for driving the support plate 21 to move up and down.
Specifically, the linkage mechanism comprises a mounting groove 23 positioned on the outer side of the mounting plate 17, the mounting groove 23 is positioned above the connecting plate 19, a transverse shaft 24 extending leftwards and rightwards is fixedly mounted in the mounting groove 23, a rotating sleeve 25 is rotatably mounted on the outer side of the transverse shaft 24, and a swinging arm 26 is fixedly mounted on the rotating sleeve 25; two auxiliary plates 27 are oppositely and fixedly arranged at the left and right of the upper end of the supporting plate 21, a small shaft 28 extending left and right is fixedly arranged between the two auxiliary plates 27, and a waist hole 29 matched with the small shaft 28 is arranged on the swinging arm 26; a mounting cavity 30 is arranged in the swing arm 26, the mounting cavity 30 is provided with a through hole 31 which extends towards the transverse shaft 24 and penetrates through the rotating sleeve 25, a locking pin 32 is movably mounted in the through hole 31, a locking groove 33 matched with the locking pin 32 is arranged on the transverse shaft 24, and when the locking pin 32 is inserted into the locking groove 33, the supporting block 22 abuts against the ground and enables the moving wheel 18 to be separated from the ground; one end, far away from the cross shaft 24, of the locking pin 32 is fixedly provided with a stopper 34, one side, far away from the cross shaft 24, of the stopper 34 is provided with a first spring 35 between the installation cavity 30, a shifting block 36 is fixedly arranged on the side face, near the stopper 34 and the locking pin 32, of the corresponding position of the swing arm 26 and the shifting block 36 is provided with a strip-shaped hole 37, and the shifting block 36 extends out of the strip-shaped hole 37 to the outer side of the swing arm 26 and can move along the strip-shaped hole 37.
The moving wheel 18 is arranged to facilitate moving the device, after the device is moved to a proper position, by rotating the swing arm 26 downwards, the swing arm 26 drives the support plate 21 to move downwards along the through groove 20 through the small shaft 28, the support plate 21 drives the support block 22 to move downwards to be close to the ground until the swing arm 26 drives the locking pin 32 to rotate to be aligned with the locking groove 33, the first spring 35 pushes the stopper 32 to be close to the transverse shaft 24, the stopper 32 drives the locking pin 32 to be inserted into the locking groove 33, so that the swing arm 26 cannot rotate continuously, at this time, the support block 22 abuts against the ground and the moving wheel 18 is separated from the ground, as shown in fig. 4, the support block 22 supports the whole device to improve the stability of the whole device, and therefore, when the first pushing mechanism pushes the sample 41 onto the cover plate 6 or when the second pushing mechanism pushes the sample 41 to be separated from the cover plate 6, the whole device is prevented from moving; or the device can be moved conveniently by pushing the shifting block 36 to the side far from the transverse shaft 24, the shifting block 36 drives the stop 34 to far from the transverse shaft 24 and compress the first spring 35, meanwhile, the stop 34 drives the locking pin 32 to separate from the locking groove 33, then the swing arm 26 is rotated upwards, the swing arm 26 drives the support plate 21 to move upwards along the through groove 20 through the small shaft 28, the support plate 21 drives the support block 22 to move upwards to separate from the ground and enable the moving wheel 18 to be in contact with the ground, as shown in fig. 5.
The connecting plate 19 is fixedly provided with a force-borrowing handle 38, and the swinging arm 26 is conveniently driven to rotate downwards by lifting the force-borrowing handle 38 with one hand and pressing the swinging arm 26 downwards with the other hand.
A baffle plate 39 positioned above the connecting plate 19 is fixedly arranged on the supporting plate 21, and a second spring 40 is arranged between the baffle plate 39 and the connecting plate 19; after the shifting block 36 is shifted to drive the locking pin 32 to be separated from the locking groove 33, the second spring 40 pushes the baffle 39 to move upwards, and the baffle 39 drives the supporting block 22 to be separated from the ground through the supporting plate 21.
As shown in fig. 6, an experimental method using the true triaxial high pressure water fracturing-gas seepage simulation experimental apparatus includes the following steps:
s1, moving the true triaxial high-pressure water fracturing-gas seepage simulation experiment apparatus by a moving mechanism, so that the sample 41 is located between the pressurization chamber 3 and the first pushing mechanism;
s2, the hydraulic cylinder 5 drives the cover plate 6 to descend so that the lower working surface 602 is attached to the ground, and in the process, the electric telescopic rod 7 drives the cover plate 6 to rotate until the lower working surface 602 is in a horizontal state;
s3, pushing the sample 41 onto the cover plate 6 by the first pushing mechanism;
s4, the hydraulic cylinder 5 drives the cover plate 6 to rise, so that the upper working surface 601 closes the lower end of the pressurized chamber 3, the cover plate 6 drives the sample 41 to enter the pressurized chamber 3, and in this process, the electric telescopic rod 7 drives the cover plate 6 to rotate until the upper working surface 601 is in a horizontal state;
s5, pressurizing the sample 41 by simulating the formation stress through the pressurizing chamber 3 and recording experimental data;
s6, the hydraulic cylinder 5 drives the cover plate 6 to descend, so that the lower working surface 602 is attached to the ground, the cover plate 6 drives the sample 41 after the experiment to move out of the pressurizing chamber 3, and in this process, the electric telescopic rod 7 drives the cover plate 6 to rotate until the lower working surface 602 is in a horizontal state;
and S7, pushing the sample 41 after the experiment to be separated from the cover plate 6 by the second pushing mechanism.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a true triaxial water under high pressure splits-gas seepage flow simulation experiment device which characterized in that: the device comprises a fixed plate, four supporting legs are fixedly arranged at four corners of the lower side of the fixed plate, and moving mechanisms are respectively arranged between the two supporting legs which are opposite to each other left and right; a pressurizing chamber is fixedly arranged at the lower side of the fixing plate, the pressurizing chamber is a rectangular box body with an opening at the lower end, and pressurizing cylinders are respectively arranged on the right side, the rear side and the upper side of the pressurizing chamber; two hydraulic cylinders extending downwards are fixedly mounted on the lower side of the fixing plate, the two hydraulic cylinders are oppositely arranged on the front side and the rear side of the pressurizing chamber, a cover plate used for sealing the lower end of the pressurizing chamber is hinged to telescopic columns of the two hydraulic cylinders, and the rotating axis of the cover plate extends forwards and backwards; the cover plate is provided with an upper working surface and a lower working surface, the upper working surface and the lower working surface extend rightwards and intersect to form an acute angle, the lower end of a telescopic column of the hydraulic cylinder is hinged to the upper working surface, and an electric telescopic rod for driving the cover plate to rotate is hinged between the left side of the telescopic column of the hydraulic cylinder and the upper working surface; two that are located the right side are equipped with first push mechanism between the supporting leg, are located left two be equipped with second push mechanism between the supporting leg.
2. The true triaxial high pressure water fracturing-gas seepage simulation experiment device of claim 1, wherein: the first pushing mechanism comprises two slide ways positioned on the inner sides of the two support legs on the right side, and the slide ways extend vertically; a moving plate is arranged between the two slideways in a vertically sliding mode, a first electric push rod extending leftwards is fixedly arranged on the moving plate, and a first push plate is fixedly arranged at the left end of the first electric push rod; and a driving mechanism for driving the movable plate to move up and down is further arranged in the slide way.
3. The true triaxial high pressure water fracturing-gas seepage simulation experiment device of claim 2, wherein: actuating mechanism includes fixed mounting and is in driving motor in the slide, coaxial fixed mounting has the threaded rod of vertical extension in driving motor's the axis of rotation, both ends close soon respectively corresponding around the movable plate on the threaded rod.
4. The true triaxial high pressure water fracturing-gas seepage simulation experiment device of claim 1, wherein: the second pushing mechanism comprises a fixed plate fixedly mounted between two supporting legs located on the left side, the fixed plate is located below the pressurizing chamber, a second electric push rod extending rightwards is fixedly mounted on the fixed plate, and a second push plate is fixedly mounted at the right end of the second electric push rod.
5. The true triaxial high pressure water fracturing-gas seepage simulation experiment device of claim 1, wherein: the moving mechanism comprises a mounting plate fixedly mounted between two left and right opposite supporting legs, and moving wheels are fixedly mounted at the lower end of the mounting plate; a connecting plate is fixedly installed on the outer side of the mounting plate, a through groove extending vertically is formed in the connecting plate, a supporting plate is installed in the through groove in a vertically sliding mode, and a supporting block located below the connecting plate is fixedly installed at the lower end of the supporting plate; and the mounting plate is also provided with a linkage mechanism for driving the supporting plate to move up and down.
6. The true triaxial high pressure water fracturing-gas seepage simulation experiment device of claim 5, wherein: the linkage mechanism comprises a mounting groove positioned on the outer side of the mounting plate, the mounting groove is positioned above the connecting plate, a transverse shaft extending leftwards and rightwards is fixedly mounted in the mounting groove, a rotating sleeve is rotatably mounted on the outer side of the transverse shaft, and a swinging arm is fixedly mounted on the rotating sleeve; two auxiliary plates are oppositely and fixedly arranged at the left and right sides of the upper end of the supporting plate, a small shaft extending left and right is fixedly arranged between the two auxiliary plates, and a waist hole matched with the small shaft is formed in the swing arm; a mounting cavity is arranged in the swing arm, the mounting cavity is provided with a through hole which extends towards the transverse shaft and penetrates through the rotating sleeve, a locking pin is movably mounted in the through hole, a locking groove matched with the locking pin is formed in the transverse shaft, and when the locking pin is inserted into the locking groove, the supporting block abuts against the ground and enables the moving wheel to be separated from the ground; the locking pin is kept away from the one end fixed mounting of cross axle has the dog, the dog is kept away from one side of cross axle with be equipped with first spring between the installation cavity, the dog with fixed mounting has the shifting block on the adjacent side of locking pin, the swing arm with shifting block relevant position department is equipped with the rectangular hole, the shifting block is followed the rectangular hole stretches out to the outside of swing arm can follow the rectangular hole removes.
7. The true triaxial high pressure water fracturing-gas seepage simulation experiment device of claim 6, wherein: and a force-borrowing grip is fixedly arranged on the connecting plate.
8. The true triaxial high pressure water fracturing-gas seepage simulation experiment device of claim 6, wherein: the supporting plate is fixedly provided with a baffle positioned above the connecting plate, and a second spring is arranged between the baffle and the connecting plate.
9. An experimental method using the true triaxial high pressure water fracturing-gas seepage simulation experimental device as claimed in any one of claims 1 to 8, the method comprising the following steps:
s1, moving the true triaxial high-pressure water fracturing-gas seepage simulation experiment device through a moving mechanism to enable the sample to be located between the pressurizing chamber and the first pushing mechanism;
s2, the hydraulic cylinder drives the cover plate to descend to enable the lower working surface to be attached to the ground, and the electric telescopic rod drives the cover plate to rotate until the lower working surface is in a horizontal state in the process;
s3, pushing the sample onto the cover plate by the first pushing mechanism;
s4, the hydraulic cylinder drives the cover plate to ascend so that the upper working surface closes the lower end of the pressurizing chamber, the cover plate drives the sample to enter the pressurizing chamber, and the electric telescopic rod drives the cover plate to rotate until the upper working surface is in a horizontal state in the process;
s5, pressurizing the sample by simulating the formation stress through the pressurizing chamber and recording experimental data;
s6, the hydraulic cylinder drives the cover plate to descend to enable the lower working surface to be attached to the ground, the cover plate drives the sample after the experiment to move out of the pressure chamber, and the electric telescopic rod drives the cover plate to rotate until the lower working surface is in a horizontal state;
and S7, pushing the sample after the experiment to be separated from the cover plate through the second pushing mechanism.
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