CN111596037A - Dynamic crack width simulation experiment device for cracks - Google Patents
Dynamic crack width simulation experiment device for cracks Download PDFInfo
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- CN111596037A CN111596037A CN202010629120.3A CN202010629120A CN111596037A CN 111596037 A CN111596037 A CN 111596037A CN 202010629120 A CN202010629120 A CN 202010629120A CN 111596037 A CN111596037 A CN 111596037A
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Abstract
The application provides a wide simulation experiment device of crack developments seam belongs to oil and natural gas engineering field. The experimental device comprises a base, a support frame, a liquid supply tank, a pressure regulating device and two clamping mechanisms. Two fixture are the relative arrangement in the base in the left and right sides orientation, and fixture includes base, moving part, driving piece, elastic expansion piece and holder, and the pedestal connection is in the base, and the moving part passes through the driving piece with the base to be connected, and the driving piece is used for driving the moving part to remove about, and elastic expansion piece telescopically connects between holder and moving part, and two holders among two fixtures are used for cooperating two rocks piece of centre gripping. The supporting frame is connected with the base. The liquid supply box is fixed on the support frame and is provided with a liquid outlet hole positioned above the gap between the two rock blocks. The pressure regulating device is connected to the liquid supply tank and used for regulating the liquid outlet pressure of the liquid supply tank. The experimental device can simulate the opening characteristic of the stratum fracture along with the increase of the liquid pressure of the fracture.
Description
Technical Field
The application relates to the field of petroleum and natural gas engineering, in particular to a dynamic crack width simulation experiment device for a crack.
Background
In hydrocarbon reservoir drilling and fracturing techniques, a surface high pressure pump injects a working fluid into a formation, the working fluid having a flowing pressure forces natural fractures in formation rock to open, and fluid loss occurs. The key of the working fluid loss is that under the condition of formation stress, the working fluid with certain flowing pressure forces the rock fracture to open so as to enter the interior of the fracture.
A conventional experiment method for simulating cracks in stratum rocks is to process rock blocks into two rock cores which correspond to each other, place the rock cores into a rock core holder, place the holder between an upper clamping plate and a lower clamping plate of a press machine, utilize the press machine to press so that a gap between the two corresponding rock cores is closed under a certain closing stress condition, arrange displacement liquid at the front end of the rock core holder at a certain flow rate, record the pressure at the front end and the rear end of the rock core holder, and obtain the flow conductivity of simulated rock core cracks. The method is mainly used for simulating the flow conductivity generated when the fracture is closed, and cannot simulate the opening characteristic of the formation fracture along with the increase of the liquid pressure.
Disclosure of Invention
The embodiment of the application provides a dynamic fracture width simulation experiment device for a fracture, and aims to solve the problem that the existing simulation experiment device cannot simulate the opening characteristic of a stratum fracture when the pressure of liquid is increased.
In a first aspect, an embodiment of the application provides a dynamic crack width simulation experiment device, which comprises a base, a support frame, a liquid supply tank, a pressure regulating device and two clamping mechanisms;
the two clamping mechanisms are oppositely arranged on the base in the left-right direction, each clamping mechanism comprises a base, a moving part, a driving part, an elastic telescopic part and a clamping part, the base is connected to the base, the moving part is connected with the base through the driving part, the driving part is used for driving the moving part to move in the left-right direction, the elastic telescopic part is telescopically connected between the clamping part and the moving part in the left-right direction, and the two clamping parts in the two clamping mechanisms are used for clamping two rock blocks in a matched mode;
the supporting frame is connected to the base;
the liquid supply box is fixed on the support frame and is provided with a liquid outlet hole positioned above a gap between the two rock blocks;
the pressure regulating device is connected with the liquid supply tank and used for regulating the liquid outlet pressure of the liquid supply tank.
Among the above-mentioned technical scheme, two holders among two fixture play the effect of two rocks of centre gripping, when needs step up the rocks, drive two moving parts respectively through two driving pieces among two fixture and be close to each other to make two holders apply the precompression to two rocks, in order to simulate the lateral pressure that the rocks received. During the test, liquid in the liquid supply box enters a gap between the two rock blocks through the liquid outlet hole, and the liquid outlet pressure of the liquid supply box can be adjusted through the pressure adjusting device, namely the pressure value of the liquid flowing out of the liquid outlet hole is adjusted. Because the clamping piece is connected with the moving piece through the elastic expansion piece, when the two clamping pieces clamp two rock blocks, the elastic expansion piece is in a compression state, and the clamping piece has the retraction capacity. Along with the increase of liquid pressure, the pressure that the holder received the liquid increases, makes the holder roll back gradually and continue compression spring, and the gap between two rocks piece is crescent, records the gap width between multiunit liquid pressure value and two rocks, obtains the gap along with the change condition of liquid pressure increase, and the simulation gap is along with liquid pressure increase, the opening characteristic of stratum fracture.
In addition, the dynamic slit width simulation experiment device for the slit provided by the embodiment of the application also has the following additional technical characteristics:
in some embodiments of the present application, the base is movably provided to the base in the left-right direction;
the dynamic slit width simulation experiment device for the slit further comprises a locking device used for locking the base and the base.
Among the above-mentioned technical scheme, the base sets up in the base movably in left and right sides direction, can adjust the position of base, accessible locking device locks after adjusting the position of base. When need place the rock piece or take out the rock piece between two holders, accessible locking device releases the base, then can conveniently place the rock piece or take out through outwards moving the base, has simplified operation process. When needs are tight with the rock piece through the holder, can inwards remove suitable position with the base earlier, through locking device with base locking, rethread driving piece drive moving part removes to make the holder press from both sides tight rock piece.
In some embodiments of the present application, the clamp is a circular arc plate;
the axis of the arc plate is arranged along the up-down direction.
Among the above-mentioned technical scheme, the holder is the circular arc board that the axis arranged along upper and lower direction, and the holder of this kind of structure can carry out the centre gripping to semicircular rock piece. After two holders carry out the centre gripping to two rocks pieces, the holder all has great area of contact with the rocks piece, is difficult for pressing from both sides the piece of rock.
In some embodiments of the present application, the inner surface wall of the arc plate is provided with a support body for placing a rock block.
Among the above-mentioned technical scheme, be equipped with the supporter on the interior table wall of circular arc board, the supporter can play the support limiting displacement to the rock, and the back is placed on the supporter to even the rock also can not move downwards relatively the circular arc board receiving the great axial pressure of liquid.
In some embodiments of the present application, the support body includes a plurality of load-bearing bars circumferentially spaced along an axis of the circular arc plate.
Among the above-mentioned technical scheme, the supporter includes a plurality of carrier bars along the axis circumference interval distribution of circular arc board, simple structure, and each carrier bar all has fine bearing capacity for all carrier bars have fine holding power to the rock piece.
In some embodiments of the present application, the top of the base is provided with a recovery groove located below the gap between two rock pieces;
the dynamic crack width simulation experiment device for the cracks further comprises a liquid storage tank and a pumping device;
the recovery tank is communicated with the liquid storage tank through a liquid return pipe;
the pumping device is used for pumping the liquid in the liquid storage tank into the liquid supply tank.
Among the above-mentioned technical scheme, because the top of base is equipped with the accumulator that is located the gap below between two rocks, the liquid that flows from the gap between two rocks piece will flow back to the accumulator. Because the recovery tank is communicated with the liquid storage tank through the liquid return pipe, the liquid entering the reflux tank can enter the liquid storage tank through the liquid return pipe. The liquid that gets into in the liquid reserve tank can go into to the liquid supply incasement through pumping device pump, and liquid in the liquid supply incasement flows into to the gap between two rocks piece through going out the liquid hole again in, realizes the cyclic utilization of liquid.
In some embodiments of the application, a partition for creating a gap between two rock pieces is provided at the top opening of the recovery tank.
Among the above-mentioned technical scheme, the top opening part of accumulator is equipped with the separator, and the separator can keep the initial gap between two rocks for experimental some repeated pressure operations that can shorten.
In some embodiments of the present application, the elastic expansion member includes a fixed cylinder, a movable rod, and an elastic member;
the fixed cylinder is fixed on the moving part, the movable rod is fixed on the clamping piece, one end of the movable rod is movably inserted into the fixed cylinder, and the elastic piece is located in the fixed cylinder and acts between the movable rod and the fixed cylinder.
Among the above-mentioned technical scheme, the one end of movable rod is movably set up in fixed section of thick bamboo, and the elastic component is located fixed section of thick bamboo and acts on between movable rod and the fixed section of thick bamboo, and at the in-process that driving piece drive moving part removed and makes the holder centre gripping rock, the movable rod will remove fixed section of thick bamboo relatively to the elastic component that the compression is located fixed section of thick bamboo makes the elastic component accumulate the elastic force, so that the holder remains the extrusion throughout to the rock. The elastic telescopic piece is simple in structure and good in structural stability.
In some embodiments of the present application, the dynamic slit width simulation experiment apparatus further includes two arc covers, and one arc cover is correspondingly fixed on one base;
the two clamping pieces are positioned in a cylindrical space defined by the two arc-shaped covers.
Among the above-mentioned technical scheme, two holders are located the cylindricality space that two arc covers were injectd, and two arc covers can protect the test personnel on every side, and the piece when preventing the extrusion fracture causes the injury to the staff.
In some embodiments of the present application, the supporting frame is movably disposed at the base back and forth.
Among the above-mentioned technical scheme, the support frame is movably set up in the base, but the support frame back-and-forth movement promptly, and the back-and-forth movement through the support frame can change the position of the confession liquid case on the support frame, is convenient for place the rock piece or take out the rock piece between two holders.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a dynamic slit width simulation experiment device for a slit provided in an embodiment of the present application;
FIG. 2 is an enlarged view of a portion A shown in FIG. 1;
FIG. 3 is a schematic connection diagram of the movable member, the elastic expansion member and the clamping member according to another embodiment;
fig. 4 is a schematic structural view of the clamping member shown in fig. 1.
Icon: 100-a dynamic crack width simulation experiment device for cracks; 10-a base; 11-a recovery tank; 12-a separator; 121-a bottom plate; 122-columnar protrusions; 13-a T-shaped slot; 14-a chute; 20-a support frame; 21-a slide block; 22-vertical plate; 23-a horizontal plate; 24-a handle; 30-a liquid supply tank; 31-liquid outlet holes; 40-a pressure regulating device; 41-hydraulic cylinder; 42-a movable plate; 50-a clamping mechanism; 51-a base; 511-T block; 512-limiting plate; 513-a vertical plate; 52-a movable member; 521-a guide hole; 522-telescopic limit piece; 53-a drive member; 54-an elastic expansion member; 541-a fixed cylinder; 542-a movable bar; 543-an elastic member; 544-a spring; 55-a clamp; 551-a guide bar; 552-a support; 5521-a carrier bar; 60-a liquid storage tank; 61-a liquid return pipe; 62-a flow meter; 70-a pumping device; 71-a liquid inlet pipe; 72-a switch valve; 80-a locking device; 90-arc cover; 200-a rock block; 210-gap.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application.
Examples
As shown in fig. 1, an experimental apparatus 100 for simulating dynamic crack width of a crack is provided in the embodiments of the present application, and includes a base 10, a supporting frame 20, a liquid supply tank 30, a pressure regulating device 40, and two clamping mechanisms 50.
The two clamping mechanisms 50 are oppositely arranged on the base 10 in the left-right direction, each clamping mechanism 50 comprises a base 51, a movable piece 52, a driving piece 53, an elastic telescopic piece 54 and a clamping piece 55, the base 51 is connected to the base 10, the movable piece 52 is connected with the base 51 through the driving piece 53, the driving piece 53 is used for driving the movable piece 52 to move in the left-right direction, the elastic telescopic piece 54 is telescopically connected between the clamping piece 55 and the movable piece 52 in the left-right direction, and the two clamping pieces 55 in the two clamping mechanisms 50 are used for clamping two rock blocks 200 in a matched mode. The supporting frame 20 is connected to the base 10. The liquid supply tank 30 is fixed to the support frame 20, and the liquid supply tank 30 is provided with a liquid outlet hole 31 above the gap 210 between the two rock pieces 200. The pressure adjusting device 40 is connected to the liquid supply tank 30, and the pressure adjusting device 40 is used for adjusting the liquid outlet pressure of the liquid supply tank 30.
The two clamping members 55 of the two clamping mechanisms 50 are used for clamping the two rock blocks 200, and when the rock blocks 200 need to be clamped, the two movable members 52 are driven to approach each other through the two driving members 53 of the two clamping mechanisms 50 respectively, so that the two clamping members 55 apply pre-pressure to the two rock blocks 200 to simulate the lateral pressure applied to the rock blocks 200. During the test, the liquid in the liquid supply tank 30 enters the gap 210 between two rock blocks 200 through the liquid outlet hole 31, and the pressure regulating device 40 can regulate the liquid outlet pressure of the liquid supply tank 30, namely the pressure value of the liquid flowing out from the liquid outlet hole 31. Since the clamping members 55 are connected to the movable member 52 by the elastic expansion members 54, when the two clamping members 55 clamp the two rock blocks 200, the elastic expansion members 54 are in a compressed state, and the clamping members 55 have a retraction capability. Along with the increase of the liquid pressure, the pressure of the incoming liquid on the clamping piece 55 is increased, the clamping piece 55 is enabled to gradually retract and continue to compress the spring 544, the gap 210 between the two rock blocks 200 is gradually increased, the width of the gap 210 between the two rock blocks and the multiple groups of liquid pressure values are recorded, the change situation of the gap 210 along with the increase of the liquid pressure is obtained, and the opening characteristic of the stratum fracture along with the increase of the liquid pressure on the gap 210 is simulated.
In this embodiment, the top of the base 10 is provided with a recovery groove 11 located below the gap 210 between the two rock pieces 200, and the top opening of the recovery groove 11 is provided with a partition 12 for allowing the two rock pieces 200 to exist in the gap 210. The spacer 12 is able to maintain the initial gap 210 between two rock blocks 200, enabling the test to shorten a portion of the repeated pressing operation.
The spacer 12 includes a bottom plate 121 and a columnar protrusion 122 disposed on the bottom plate 121, and the columnar protrusion 122 and the bottom plate 121 form a T-shaped structure. The bottom plate 121 is fixedly connected with the wall of the recycling tank 11 at the top opening, and the bottom plate 121 does not completely shield the top opening of the recycling tank 11. In testing, columnar protrusions 122 are positioned between two rock pieces 200, maintaining two rock pieces 200 in a gap 210.
In addition, the dynamic slit width simulation experiment apparatus 100 for cracks further comprises a liquid storage tank 60 and a pumping device 70. The recovery tank 11 communicates with the liquid storage tank 60 through a liquid return pipe 61. The pumping device 70 is used to pump the liquid in the liquid storage tank 60 into the liquid supply tank 30.
During the experiment, the liquid flowing out of the gap 210 between the two rock blocks 200 will flow back to the recovery tank 11; the liquid entering the reflux tank can enter the liquid storage tank 60 through the liquid return pipe 61; the liquid entering the liquid storage tank 60 can be pumped into the liquid supply tank 30 through the pumping device 70, and the liquid in the liquid supply tank 30 flows into the gap 210 between the two rock blocks 200 through the liquid outlet holes 31, so that the liquid can be recycled.
The pumping device 70 is a water pump, the water pump is located in the liquid storage tank 60, and a liquid outlet of the water pump is communicated with the liquid supply tank 30 through a liquid inlet pipe 71. The liquid inlet pipe 71 is provided with a switch valve 72. The liquid return pipe 61 is provided with a flow meter 62 for measuring the flow rate of the liquid entering the liquid storage tank 60 from the recovery tank 11.
In this embodiment, the base 51 is movably disposed on the base 10 in the left-right direction, and the dynamic slit width simulation experiment apparatus 100 further includes a locking device 80 for locking the base 51 and the base 10.
The base 51 is movably disposed on the base 10 in the left-right direction, the position of the base 51 can be adjusted, and the base 51 can be locked by the locking device 80 after the position is adjusted. When it is desired to place a rock piece 200 between two clamps 55 or to remove a rock piece 200, the base 51 can be released by the locking device 80, and the rock piece 200 can be conveniently placed or removed by moving the base 51 outwards, simplifying the operating procedure. When the rock block 200 needs to be clamped by the clamping member 55, the base 51 can be moved inwards to a proper position, the base 51 is locked by the locking device 80, and then the movable member 52 is driven to move by the driving member 53, so that the clamping member 55 clamps the rock block 200.
The base 51 is a plate-shaped structure, the base 51 is arranged on the upper surface of the base 10, the bottom of the base 51 is provided with a T-shaped block 511, the upper surface of the base 10 is provided with a T-shaped groove 13 arranged along the left-right direction, and the T-shaped block 511 is movably clamped in the T-shaped groove 13. One end of the base 51 in the left-right direction is provided with a limiting plate 512, and the limiting plate 512 is used for abutting against one end face of the base 10. When the limit plate 512 of the left base 51 abuts against an end face of the base 10, the left base 51 cannot move to the right; when the limiting plate 512 of the right base 51 abuts against the other end of the base 10, the right base 51 cannot move to the left.
In this embodiment, the locking device 80 is a locking screw screwed to the base 51. Tightening the locking screw locks the base 51 to the base 10, and the base 51 cannot move relative to the base 10; loosening the locking screw releases the base 51, and the base 51 can move relative to the base 10.
It should be noted that, in other embodiments, the base 51 may be directly fixed to the base 10.
A vertical plate 513 is fixedly arranged on the base 51, the movable element 52 is a plate-shaped element arranged parallel to the vertical plate 513, the driving element 53 is connected between the vertical plate 513 and the movable element 52, and the lower end of the movable element 52 is placed on the upper surface of the base 51. Illustratively, the driving member 53 is an electric push rod, a distal end of the electric push rod is fixedly connected to the vertical plate 513, and the other end of the electric push rod is fixedly connected to the moving member 52, so that the moving member 52 can move left and right when the electric push rod works, and of course, in order to further improve the stability of the moving member 52 moving left and right, a guide rod for moving the moving member 52 left and right may be disposed on the vertical plate 513.
In this embodiment, as shown in fig. 2, the elastic expansion piece 54 includes a fixed cylinder 541, a movable rod 542, and an elastic piece 543. The fixed cylinder 541 is fixed to the movable element 52, the movable rod 542 is fixed to the clamping element 55, one end of the movable rod 542 is movably inserted into the fixed cylinder 541, and the elastic element 543 is located in the fixed cylinder 541 and acts between the movable rod 542 and the fixed cylinder 541.
In the process that the driving element 53 drives the movable element 52 to move so that the clamping element 55 clamps the rock block 200, the movable rod 542 moves relative to the fixed cylinder 541, thereby compressing the elastic element 543 located in the fixed cylinder 541, and accumulating the elastic force of the elastic element 543 so that the clamping element 55 always presses the rock block 200. The elastic expansion piece 54 has a simple structure and good structural stability.
Illustratively, the resilient member 543 is a spring.
It will be appreciated that the resilient telescoping member 54 between the moveable member 52 and the clamping member 55 can be one, two, three, etc. Illustratively, two elastic expansion members 54 are arranged between the movable member 52 and the clamping member 55, and the two elastic expansion members 54 are arranged at intervals in the vertical direction.
It should be noted that in other embodiments, as shown in fig. 3, the elastic expansion member 54 may have other structures, for example, the elastic expansion member 54 is a spring 544, one end of the spring 544 is connected to the movable member 52, and the other end of the spring 544 is connected to the clamping member 55. In this case, a guide rod 551 may be fixedly installed on the clamping member 55, a guide hole 521 may be installed on the movable member 52, the guide rod 551 is inserted into the guide hole 521, and the spring 544 is sleeved outside the guide rod 551.
In this embodiment, as shown in fig. 4, the clamping member 55 is an arc plate, and the axis of the arc plate is arranged in the vertical direction. The clamp 55 of this construction can clamp the semicircular rock block 200. After two holders 55 carry out the centre gripping to two rock pieces 200, holder 55 all has great area of contact with rock piece 200, is difficult for pressing from both sides the piece with rock piece 200 garrulous.
In addition, be equipped with the supporter 552 that is used for placing rock piece 200 on the interior table wall of circular arc board, supporter 552 can play the spacing effect of support to rock piece 200, and supporter 552 places back on supporter 552, even rock piece 200 can not move downwards relatively the circular arc board receiving the great axial pressure of liquid yet.
The support body 552 is close to the bottom end of the circular arc plate, and the support body 552 can be of various structures. Illustratively, the supporting body 552 comprises a plurality of bearing rods 5521 distributed at intervals along the circumference of the axis of the circular arc plate, the structure of the supporting body 552 is simple, and each bearing rod 5521 has good bearing capacity, so that all the bearing rods 5521 have good supporting capacity for the rock block 200. In other embodiments, the supporting body 552 may have other structures, for example, the supporting body 552 is a plate-shaped member disposed on the inner surface wall of the circular arc plate.
With continued reference to fig. 1, in the present embodiment, the dynamic slit width simulation experiment apparatus 100 further includes two arc-shaped covers 90, and one arc-shaped cover 90 is correspondingly fixed on one base 51. Two clamps 55 are located in the cylindrical space defined by the two arc-shaped shrouds 90. Two arc covers 90 can protect the testing personnel on every side, prevent that the piece when the extrusion is cracked from causing the injury to the staff.
Wherein, the arc cover 90 is provided with a through hole, the fixed cylinder 541 of the elastic expansion piece 54 is located outside the arc cover 90, and one end of the movable rod 542 passes through the through hole of the arc cover 90 to be connected and fixed with the clamping piece 55.
In addition, in the present embodiment, the movable member 52 is fixedly provided with a telescopic limiting member 522 for pushing the clamping member 55. When a dynamic test is required, the telescopic limit piece 522 can be shortened, and the clamping piece 55 gradually retracts and compresses the spring 544 along with the increase of the liquid pressure so as to record the change condition of the gap 210 between two rocks; when a static test is needed, the telescopic limiting piece 522 can be extended and abutted against the rock to prevent the rock from moving backwards, the clamping piece cannot retreat along with the increase of the liquid pressure, and the gap 210 between the two rocks is kept unchanged and can be used for measuring the flow conductivity of the rock.
Illustratively, the telescoping stop 522 is a hydraulic cylinder.
Wherein, the arc cover 90 is provided with a through hole for the telescopic limiting member 522 to pass through.
In this embodiment, the supporting frame 20 is movably disposed on the base 10 in a front-back direction, i.e. the supporting frame 20 can move in a front-back direction, and the position of the liquid supply tank 30 on the supporting frame 20 can be changed by the front-back movement of the supporting frame 20, so as to place the rock block 200 between the two clamping members 55 or take out the rock block 200.
Wherein, the bottom of the supporting frame 20 is provided with a slide block 21, the base 10 is provided with a slide groove 14 for the slide block 21 to slide, and the slide block 21 and the slide groove 14 are both in a dovetail shape.
The support frame 20 comprises a vertical plate 22 and a horizontal plate 23, one end of the horizontal plate 23 is connected to the top end of the vertical plate 22, and the sliding block 21 is fixed to the bottom end of the vertical plate 22. The vertical plate 22 is provided with a handle 24 for pulling the support frame 20.
The liquid supply tank 30 is fixed to the lower surface of the horizontal plate 23.
In this embodiment, the pressure adjusting device 40 includes a hydraulic cylinder 41 and a movable plate 42, the hydraulic cylinder 41 is located in the liquid supply tank 30, the hydraulic cylinder 41 is fixed to the lower surface of the vertical plate 22, the movable plate 42 is movably disposed in the liquid supply tank 30, the movable plate 42 and the liquid supply tank 30 form a movable seal, and a piston rod of the hydraulic cylinder 41 is connected to the movable plate 42. When the hydraulic cylinder 41 operates to move the movable plate 42 downward, the movable plate 42 can press the liquid in the liquid supply tank 30 out of the liquid outlet hole 31, and the pressure of the liquid in the liquid supply tank 30 can be adjusted by controlling the hydraulic cylinder 41. Of course, before the hydraulic cylinder 41 is operated, the on-off valve 72 on the liquid inlet pipe 71 may be closed to prevent a part of the liquid in the liquid supply tank 30 from flowing out of the liquid inlet pipe 71.
Further, a pressure sensor may be provided in the liquid supply tank 30 to measure a pressure value of the liquid.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides a wide simulation experiment device of fracture developments seam which characterized in that includes:
a base;
the clamping mechanism comprises a base, a moving part, a driving part, an elastic telescopic part and clamping parts, the base is connected to the base, the moving part is connected with the base through the driving part, the driving part is used for driving the moving part to move in the left and right directions, the elastic telescopic part is telescopically connected between the clamping parts and the moving part in the left and right directions, and the two clamping parts in the two clamping mechanisms are used for clamping two rock blocks in a matched mode;
the supporting frame is connected to the base;
the liquid supply box is fixed on the support frame and is provided with a liquid outlet hole positioned above a gap between the two rock blocks; and
and the pressure regulating device is connected with the liquid supply tank and used for regulating the liquid outlet pressure of the liquid supply tank.
2. The dynamic slit width simulation experiment device of claim 1, wherein the base is movably disposed on the base in the left-right direction;
the dynamic slit width simulation experiment device for the slit further comprises a locking device used for locking the base and the base.
3. The dynamic slit width simulation experiment device for the slits as claimed in claim 1, wherein the clamping member is a circular arc plate;
the axis of the arc plate is arranged along the up-down direction.
4. The dynamic crack width simulation experiment device for the cracks as claimed in claim 3, wherein the inner surface wall of the circular arc plate is provided with a support body for placing rock blocks.
5. The dynamic slit width simulation experiment device for the cracks as claimed in claim 4, wherein the supporting body comprises a plurality of carrying rods circumferentially distributed at intervals along the axis of the circular arc plate.
6. The dynamic crack width simulation experiment device for the cracks as claimed in claim 1, wherein a recovery groove is arranged at the top of the base and below the gap between the two rock blocks;
the dynamic crack width simulation experiment device for the cracks further comprises a liquid storage tank and a pumping device;
the recovery tank is communicated with the liquid storage tank through a liquid return pipe;
the pumping device is used for pumping the liquid in the liquid storage tank into the liquid supply tank.
7. The dynamic crack width simulation experiment device for the crack of claim 6, wherein a separator for making the two rock blocks have a crack is arranged at the top opening of the recovery tank.
8. The dynamic slit width simulation experiment device for the slits as claimed in claim 1, wherein the elastic expansion member comprises a fixed cylinder, a movable rod and an elastic member;
the fixed cylinder is fixed on the moving part, the movable rod is fixed on the clamping piece, one end of the movable rod is movably inserted into the fixed cylinder, and the elastic piece is located in the fixed cylinder and acts between the movable rod and the fixed cylinder.
9. The dynamic slit width simulation experiment device for the cracks as claimed in claim 1, wherein the dynamic slit width simulation experiment device further comprises two arc-shaped covers, one arc-shaped cover is correspondingly fixed on one base;
the two clamping pieces are positioned in a cylindrical space defined by the two arc-shaped covers.
10. The dynamic slit width simulation experiment device for the slits as claimed in claim 1, wherein the supporting frame is movably disposed on the base in a front-back direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010629120.3A CN111596037B (en) | 2020-07-01 | 2020-07-01 | Dynamic crack width simulation experiment device for cracks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010629120.3A CN111596037B (en) | 2020-07-01 | 2020-07-01 | Dynamic crack width simulation experiment device for cracks |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111596037A true CN111596037A (en) | 2020-08-28 |
| CN111596037B CN111596037B (en) | 2022-09-27 |
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