CN115949407A - Coal bed punching assembly for test - Google Patents
Coal bed punching assembly for test Download PDFInfo
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- CN115949407A CN115949407A CN202211668213.2A CN202211668213A CN115949407A CN 115949407 A CN115949407 A CN 115949407A CN 202211668213 A CN202211668213 A CN 202211668213A CN 115949407 A CN115949407 A CN 115949407A
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Abstract
The invention discloses a coal seam punching assembly for testing, which comprises a punching feeding system and a punching execution system, wherein the punching feeding system comprises a punching head and a punching head; the punching feeding system comprises a servo motor and a screw rod nut mechanism; the punching execution system comprises a central pipe column, an outer pipe column and a nozzle, wherein the central pipe column is fixedly arranged in the outer pipe column and coaxially arranged, the left end of the central pipe column is positioned outside the outer pipe column and penetrates through a flange plate to stretch into a punching port, the nozzle is fixedly arranged at the left end of the central pipe column, a punching liquid outlet pipe is further arranged on the flange plate in a penetrating manner, the punching liquid outlet pipe is connected into an interlayer between the central pipe column and the outer pipe column, a transversely-connected liquid supply pipeline is arranged on the side wall of the central pipe column, and a transversely-connected liquid discharge pipeline is arranged on the outer pipe column. The device can be used for simulating the coal seam punching fracturing, has high control precision, and can perform punching fracturing at different jet distances.
Description
Technical Field
The invention belongs to the technical field of coal seam mining simulation tests, and particularly relates to a coal seam punching assembly for testing.
Background
The hydraulic punching is generally adopted in the existing true triaxial coal seam test piece simulation test system, and the following problems mainly exist: (1) The inlet and outlet channels of the punching liquid have complex structures and low control precision, and the punching with different spraying distances can not be carried out. (2) The size of the adopted model is small, certain space limitation exists, and the real scene of the multi-coal seam caused by punching and fracturing under true triaxial stress cannot be accurately simulated.
Disclosure of Invention
The invention aims to provide a coal seam punching assembly for testing, which can be used for simulating coal seam punching and cracking, has high control precision and can perform punching and cracking at different jet distances.
Therefore, the technical scheme adopted by the invention is as follows: a coal bed punching component for testing is characterized in that the punching fracturing component is connected into a punching interface for testing through a flange plate; the punching fracturing assembly comprises a punching feeding system and a punching execution system;
the punching feeding system comprises a servo motor and a screw rod nut mechanism;
the punching execution system comprises a center pipe column, an outer pipe column and a nozzle, wherein the center pipe column is fixedly arranged in the outer pipe column and coaxially arranged, the left end of the center pipe column is positioned outside the outer pipe column and penetrates through a flange plate to extend into a punching interface, the nozzle is fixedly arranged at the left end of the center pipe column, a punching liquid outlet pipe is also arranged on the flange plate in a penetrating manner, the punching liquid outlet pipe is connected into an interlayer between the center pipe column and the outer pipe column, a transversely-connected liquid supply pipeline is arranged on the side wall of the center pipe column, and a transversely-connected liquid discharge pipeline is arranged on the outer pipe column;
the servo motor controls the center pipe column, the outer layer pipe column and the nozzle to move left and right through the feed screw nut mechanism, so that the spraying distance of the nozzle is adjusted, the feeding displacement of the nozzle is measured by a displacement sensor, and the displacement sensor is installed on a nut of the feed screw nut mechanism.
Preferably, the liquid supply pipeline comprises a carbon dioxide gas source, a pressure reducing valve, a first pressure gauge, an electromagnetic flow meter, a first stop valve, a one-way valve and a pressure sensor which are sequentially connected through pipelines, and the high-pressure pump, the energy accumulator, the second pressure gauge and the second stop valve are sequentially connected in series and then connected to the liquid supply pipeline between the one-way valve and the pressure sensor; and a bag filter is arranged on the liquid discharge pipeline.
Further preferably, the test device further comprises a main body model and a main body frame for supporting the main body model, wherein the main body model comprises a main body high-pressure cavity module and a test piece box module, the main body high-pressure cavity module is of a high-pressure closed pressure bin structure with an outer circle and an inner circle and is defined by a cylinder and left and right circular end covers, the test piece box module is a rectangular test piece accommodating cavity, the axis lines of the rectangular test piece accommodating cavity and the high-pressure closed pressure bin are collinear, and a cushion block is arranged between the main body high-pressure cavity module and the test piece box module; grooves are formed in the top of the lower cushion block below the test piece box module at intervals left and right, and a row of lifters are mounted on the grooves and can protrude out of the lower cushion block and also can sink into the lower cushion block; a row of rollers are arranged at the bottom of the test piece box module at left and right intervals through a lining plate, and when the test piece box module is pushed into the main body high-pressure cavity module, the lifter is supported below the rollers;
the main body frame is of a rectangular frame structure, the main body model is arranged in the rectangular frame structure, the left end and the right end of the main body model extend out of the main body frame, a transfer slide rail is arranged on the right side of the main body frame and extends to the position right below the main body high-pressure cavity module, and the width of the transfer slide rail is smaller than the inner space width of the main body frame; the test piece box lifting transfer frame and the right round end cover transfer frame are arranged on the transfer slide rail in a sliding mode, can perform lifting movement and are used for supporting the test piece box module; the right round end cover transfer frame top is the arc and is used for holding up right round end cover, just in time enables test piece case module level to push in the main part high-pressure chamber module after test piece case lift transfer frame rises, and test piece case lift transfer frame descends the back top and is less than the bottom of main part high-pressure chamber module to in the below of main part high-pressure chamber module of being convenient for slide in, make right round end cover transfer frame can slide left and carry out the installation of right round end cover to the settlement position.
The main body model has the following characteristics:
(1) The test piece box module with the outer circle and the inner square is adopted for mounting the environment, so that the internal pressure resistance is stronger, the sealing capability is better, the internal pressure resistance can be up to 10MPa, and a better test environment is provided for the multi-field coupling coal rock mass dynamic disaster prevention and control simulation test;
(2) The left and right spaced grooves on the top of the lower cushion block are provided with a row of lifters capable of protruding or sinking into the lower cushion block, and the bottom of the test piece box module is provided with a row of rollers at left and right spaced intervals through a lining plate;
(3) The main body model is arranged in a main body frame in a rectangular frame structure, and the main body frame is used for bearing the main body model; the test piece box lifting and transferring frame can perform lifting motion and is used for supporting the test piece box module; the right circular end cover is transported and is put up the top and be used for holding up right circular end cover, just in time enable test piece case module level to push in the main part high-pressure chamber module after test piece case lift transport frame rises, test piece case lift transport frame descends the back top and is less than the bottom of main part high-pressure chamber module, so that slide in the below of main part high-pressure chamber module, make right circular end cover transport frame can slide left and carry out the installation of right circular end cover to setting for the position, the structural style of slide rail is transported in the double transport frame sharing of special design to large-scale test piece case, the operation is light, degree of automation is high.
More preferably, the inner cavity of the test piece box module can be provided with a rectangular test piece with the length of 1000 multiplied by the width of 400 multiplied by the height of 400mm, and the internal pressure resistance of the main body high-pressure cavity module is 10MPa.
Preferably, each lifter adopts a double-support structure which is arranged symmetrically at intervals in the front-back direction, each lifter adopts independent hydraulic drive, and all the lifters move in a synchronous lifting mode.
More preferably, the main body frame is formed by welding profile steels.
The invention has the beneficial effects that: the servo motor and the screw rod nut mechanism are used as driving devices to carry out punching feeding, so that the control precision is high, and the operation is convenient; a punching execution system consisting of a central pipe column, an outer layer pipe column and a nozzle is adopted to carry out the feeding and discharging of punching liquid, and the punching execution system can synchronously advance and retreat, so that the spraying distance of the nozzle is adjusted, and punching cracking simulation tests with different spraying distances can be carried out; the central pipe column and the outer pipe column are of coaxial sleeving structures, punching liquid is transversely connected into the central pipe column and is discharged through an interlayer between the central pipe column and the outer pipe column, and the structure is simple and the design is ingenious.
Drawings
Figure 1 is a state diagram of the use of the present invention.
Fig. 2 is a state before the test piece box module is loaded into the main body high pressure chamber module.
Fig. 3 is a schematic structural diagram of the body model.
Fig. 4 is an inner left side view of fig. 3.
Fig. 5 is a schematic structural view of a specimen box module.
Fig. 6 is an inner left side view of fig. 5.
FIG. 7 is a simplified diagram of the arrangement of the heating tube, the temperature control probe and the ultrasonic probe.
Fig. 8 is a simplified illustration of a blow-by prevention plate.
Detailed Description
The invention will be further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1, a test coal bed punching assembly is connected into a test punching interface through a flange b; the punching and fracturing assembly mainly comprises a punching feeding system and a punching execution system.
The punching feeding system mainly comprises a servo motor s and a screw rod nut mechanism c. The servo motor s drives the screw rod to rotate, and the screw rod drives the nut to move left and right.
The punching execution system mainly comprises a central pipe column d, an outer layer pipe column e and a nozzle (not shown in the figure), wherein the central pipe column d is fixedly arranged in the outer layer pipe column e and is coaxially arranged. The left end of the central pipe column d is positioned outside the outer pipe column e and extends into the punching port a through the flange b, the nozzle is fixedly arranged at the left end of the central pipe column d, and a punching liquid outlet pipe (not shown in the figure) is further arranged on the flange b in a penetrating manner.
The punching liquid receiving pipe is connected into an interlayer between the central pipe column d and the outer pipe column e, a transversely connected liquid supply pipeline is arranged on the side wall of the central pipe column d, and a transversely connected liquid discharge pipeline is arranged on the outer pipe column e.
The servo motor controls the center pipe column d, the outer layer pipe column e and the nozzle to move left and right through the screw rod nut mechanism, so that the spraying distance of the nozzle is adjusted, and the feeding displacement of the nozzle is measured by a displacement sensor (not shown in the figure). The pressure sensor m displays the real-time injection liquid carbon dioxide value, and the electromagnetic flowmeter i displays the real-time flow of the injection fluid. And the displacement sensor is arranged on a nut of the feed screw nut mechanism c. The pressure sensor m displays the real-time injection liquid carbon dioxide value, and the electromagnetic flowmeter i displays the real-time flow of the injection fluid.
The liquid supply pipeline comprises a carbon dioxide gas source f, a pressure reducing valve g, a first pressure gauge h, an electromagnetic flow meter i, a first stop valve j, a one-way valve k and a pressure sensor m which are sequentially connected through pipelines, and a high-pressure pump n, an energy accumulator p, a second pressure gauge q and a second stop valve r are sequentially connected in series and then connected to the liquid supply pipeline between the one-way valve k and the pressure sensor m. The punching liquid is sent to the nozzle through the central pipe column for punching; because the pressure is kept in the nozzle, the punching liquid after punching carries the scraps to flow out through an interlayer between the punching liquid outlet pipe, the central pipe column and the outer pipe column.
A bag filter r is arranged on the liquid discharge pipeline. The servo motor s is fixedly installed on the base t, the front end of a screw rod of the screw rod nut mechanism is also installed on the base t through a support, the front end of the screw rod is not provided with threads, and a rotating bearing is installed between the screw rod and the support.
As shown in fig. 2, the test piece box lifting and transporting device further comprises a main body model, a main body frame 37 for supporting the main body model, a transporting slide rail 36, a test piece box lifting and transporting frame 34 and a right circular end cover transporting frame 35. The main body model comprises a main body high-pressure cavity module and a test piece box module. The main body high-pressure cavity module is of a high-pressure closed pressure bin structure with an outer circle and an inner circle, the high-pressure closed pressure bin structure is formed by a cylinder and left and right end covers, the test piece box module is a rectangular test piece accommodating cavity, the rectangular test piece accommodating cavity and the axis of the high-pressure closed pressure bin are collinear, and a cushion block is installed between the main body high-pressure cavity module and the test piece box module.
The main body frame 37 is a rectangular frame structure, and the left and right ends of the main body model extend out of the main body frame 37. The right side of main part frame 37 is provided with transports slide rail 36, and transports slide rail 36 and extends to under the main part high pressure chamber module, and transports slide rail 36's width and is less than the interior empty width of main part frame 37. The transfer slide rail 36 is provided with a test piece box lifting transfer frame 34 and a right circular end cover transfer frame 35 in a sliding manner, and the test piece box lifting transfer frame 34 can move up and down and is used for supporting the test piece box module. The top of the right circular end cover transfer frame 35 is an arc and is used for supporting the right circular end cover 5, the test piece box lifting transfer frame 34 is just right capable of horizontally pushing the test piece box module into the main body high-pressure cavity module after being lifted, the top of the test piece box lifting transfer frame 34 is lower than the bottom of the main body high-pressure cavity module after being lowered, so that the test piece box lifting transfer frame slides into the lower part of the main body high-pressure cavity module, and the right circular end cover transfer frame 35 can slide leftwards to a set position to carry out installation of the right circular end cover 5.
As shown in fig. 3-4, the main body model mainly comprises a main body high-pressure cavity module and a test piece box module.
The shell 1 of the main body high-pressure cavity module is a high-pressure closed pressure chamber structure with an outer circle and an inner circle, which are formed by combining a circular ring 3, a left circular end cover 4, a right circular end cover 5 and bolts. The front cushion block 2, the rear cushion block 9, the upper cushion block 10 and the lower cushion block 11 are respectively arranged on the front, the rear, the upper and the lower parts of the inner wall of the circular ring 3. A rectangular cavity is defined by the front cushion block 2, the rear cushion block 9, the upper cushion block 10 and the lower cushion block 11 and is just used for placing the test piece box module.
Run through on the left circle end cover 4 and install axial hydraulic cylinder 6, right circle end cover 5 divide into punching hole type, seepage flow type, three kinds of outstanding types, and the middle part of right circle end cover 5 runs through respectively to install and punches a hole, seepage flow, outstanding interface, promptly: when the right circular end cover 5 is in a punching type, a punching interface is arranged in the middle of the right circular end cover 5 in a penetrating mode and used for a punching test; when the right circular end cover 5 adopts a seepage type, a seepage interface is arranged in the middle of the right circular end cover 5 in a penetrating way and is used for a seepage test; when the right circular end cover 5 adopts a protruding type, a protruding interface is installed in the middle of the right circular end cover 5 in a penetrating mode and used for a protruding test. Only the right circular end cover 5 needs to be replaced, and correspondingly different interfaces are arranged on the right circular end cover 5, so that different tests can be carried out.
The left round end cover 4 and the right round end cover 5 are respectively provided with a wire harness pipeline leading-out hole 7 in a penetrating mode, the top of the lower cushion block 11 is provided with a row of lifters 8 at intervals in a left-right mode, and the lifters 8 can protrude out of the lower cushion block 11 and can also sink into the lower cushion block 11. Each lifter 8 adopts a double-wheel structure which is arranged at intervals and symmetrically in the front and the back, so that front and back double support are realized, and the stress is balanced and stable. Each lifter 8 is driven by independent hydraulic pressure, and all the lifters 8 are controlled by a control system to move synchronously.
With reference to fig. 3-6, the test piece box module is a rectangular test piece accommodating cavity formed by combining a left side plate 12, a bottom plate 13, a top plate 14, a right side plate 15, a front side plate 23 and a rear side plate 24 and bolts, and the rectangular test piece accommodating cavity is collinear with the axial lead of the high-pressure closed pressure bin, so that the rectangular test piece is arranged in the main body model in the middle. A left pressing plate 16 is installed on the left side of the rectangular test piece accommodating cavity, a plurality of upper pressing plates 17 are installed on the left and right of the top of the rectangular test piece accommodating cavity in sequence, and a plurality of front pressing plates 18 are installed on the left and right of the front of the rectangular test piece accommodating cavity in sequence. The axial hydraulic cylinder 6 can penetrate through the left side plate 12 to be connected with the left pressing plate 16, each upper pressing plate 17 is connected with the top hydraulic cylinder 20 through an upper cushion block 19 which penetrates through the top plate 14, the top hydraulic cylinder 20 is provided with a hydraulic piston 20a, the upper cushion block 19 acts through the hydraulic piston 20a, and then the upper pressing plate 17 applies load to the rectangular test piece. Each front press plate 18 is connected to a lateral hydraulic cylinder 22 by means of a lateral spacer 21 mounted through a front side plate 23, the lateral hydraulic cylinder 22 also carrying a hydraulic piston, the lateral spacer 21 being acted upon by the hydraulic piston, and the front press plate 18 then applying a load to the rectangular test piece.
Referring to fig. 3-7, the upper press plate 17, the front press plate 18, the bottom plate 13, and the rear side plate 24 are provided with a plurality of heating pipes 27 and temperature control probes 28, and the upper press plate 17, the front press plate 18, the left press plate 16, the bottom plate 13, the rear side plate 24, and the right side plate 15 are provided with a plurality of ultrasonic probes 29. A row of rollers 26 are mounted at the bottom of the test piece box module at intervals left and right through a lining plate 25, and when the test piece box module is pushed into the main body high pressure chamber module, the lifter 8 is supported below the rollers 26.
Preferably, a high-frequency vibrator is mounted on the cavity of the axial hydraulic cylinder 6, and under the action of a high-pressure air source, high-speed vibration is generated, and high-frequency vibration force can be transmitted to the test piece rightwards through the corresponding hydraulic cavity, the hydraulic piston and the left pressing plate 16.
A blow-by preventing plate 30 corresponding to the upper press plate 17 is disposed directly above the bottom plate 13, and as shown in fig. 6, a central air inlet 30a and a plurality of annular grooves 30b surrounding the central air inlet 30a are disposed on the blow-by preventing plate 30, and all the annular grooves 30b are communicated with the central air inlet 30a through communication grooves 30c distributed in a divergent manner. The annular grooves 30b are rectangular or circular and are equally spaced.
The air inlet pipe transversely penetrates through the side wall of the test piece box module and is connected to the bottom of the central air inlet hole 30a, the air-permeable partition plate 31 is installed above the anti-channeling plate 30, the filter plates 32 are installed at the left end and the right end of the test piece, and the sealing gaskets 33 are installed above, below, in the front and at the back of the test piece.
The inner cavity of the test piece box module can be used for mounting a rectangular test piece with the length of 1000 multiplied by the width of 400 multiplied by the height of 400mm, and the internal pressure resistance of the main body high-pressure cavity module is 10MPa. But is not limited to this gauge size.
Only one axial hydraulic cylinder 6 is arranged, and the maximum loading pressure is 5000kN; four groups of top hydraulic cylinders 20 and side hydraulic cylinders 22 are provided, each group of hydraulic cylinders is provided with two hydraulic loading systems connected in parallel for pressurization, one of the hydraulic loading systems is a static load loading system, the other hydraulic loading system is a dynamic load loading system, the maximum loading pressure of a single group of hydraulic loading devices is 3000kN, each group of hydraulic loading systems independently controls one pressing plate and is arranged in the left-right center of the corresponding pressing plate, and the axial hydraulic cylinders 6, the top hydraulic cylinders 20 and the side hydraulic cylinders 22 can all load dynamic and static loads.
Claims (6)
1. A coal seam punching assembly for testing is characterized in that: the punching fracturing assembly is connected into the punching interface for the test through the flange plate; the punching fracturing assembly comprises a punching feeding system and a punching execution system;
the punching feeding system comprises a servo motor and a screw rod nut mechanism;
the punching execution system comprises a center pipe column, an outer pipe column and a nozzle, wherein the center pipe column is fixedly arranged in the outer pipe column and coaxially arranged, the left end of the center pipe column is positioned outside the outer pipe column and penetrates through a flange plate to extend into a punching interface, the nozzle is fixedly arranged at the left end of the center pipe column, a punching liquid outlet pipe is also arranged on the flange plate in a penetrating manner, the punching liquid outlet pipe is connected into an interlayer between the center pipe column and the outer pipe column, a transversely-connected liquid supply pipeline is arranged on the side wall of the center pipe column, and a transversely-connected liquid discharge pipeline is arranged on the outer pipe column;
the servo motor controls the center pipe column, the outer layer pipe column and the nozzle to move left and right through the feed screw nut mechanism, so that the spraying distance of the nozzle is adjusted, the feeding displacement of the nozzle is measured by a displacement sensor, and the displacement sensor is installed on a nut of the feed screw nut mechanism.
2. A test coal bed punching assembly as set forth in claim 1, wherein: the liquid supply pipeline comprises a carbon dioxide gas source, a pressure reducing valve, a first pressure gauge, an electromagnetic flowmeter, a first stop valve, a one-way valve and a pressure sensor which are sequentially connected through the pipeline, and the high-pressure pump, the energy accumulator, the second pressure gauge and the second stop valve are sequentially connected in series and then connected to the liquid supply pipeline between the one-way valve and the pressure sensor; and a bag filter is arranged on the liquid discharge pipeline.
3. A test coal bed punching assembly according to claim 1 or 2, characterized in that: the test device is characterized by also comprising a main body model and a main body frame (37) for supporting the main body model, wherein the main body model comprises a main body high-pressure cavity module and a test piece box module, the main body high-pressure cavity module is of a high-pressure closed pressure bin structure with an outer circle and an inner circle and is defined by a cylinder and left and right circular end covers, the test piece box module is a rectangular test piece accommodating cavity, the axis lines of the rectangular test piece accommodating cavity and the high-pressure closed pressure bin are collinear, and a cushion block is arranged between the main body high-pressure cavity module and the test piece box module; grooves are formed in the top of a lower cushion block (11) below the test piece box module at intervals left and right, and a row of lifters (8) are mounted, and the lifters (8) can protrude out of the lower cushion block (11) and can also sink into the lower cushion block (11); a row of rollers (26) are arranged at the bottom of the test piece box module at left and right intervals through a lining plate (25), and when the test piece box module is pushed into the main body high-pressure cavity module, the lifter (8) is supported below the rollers (26);
the main body frame (37) is of a rectangular frame structure, the main body model is arranged in the rectangular frame structure, the left end and the right end of the main body model extend out of the main body frame (37), a transfer slide rail (36) is arranged on the right side of the main body frame (37), the transfer slide rail (36) extends to the position right below the main body high-pressure cavity module, and the width of the transfer slide rail (36) is smaller than the inner hollow width of the main body frame (37); a test piece box lifting transfer frame (34) and a right circular end cover transfer frame (35) are slidably mounted on the transfer slide rail (36), and the test piece box lifting transfer frame (34) can perform lifting movement and is used for supporting the test piece box module; right side dome transports frame (35) top is the arc and is used for holding up right dome (5), just in time enables test piece case module level and pushes in main part high-pressure chamber module after test piece case lift transports frame (34) rises, the top is less than the bottom of main part high-pressure chamber module after test piece case lift transports frame (34) descends, so that slide in the below of main part high-pressure chamber module, make right dome transport frame (35) can slide left to the settlement position and carry out the installation of right dome (5).
4. A test coal bed punching assembly according to claim 3, wherein: the inner cavity of the test piece box module can be provided with a rectangular test piece with the length of 1000 multiplied by the width of 400 multiplied by the height of 400mm, and the inner part of the main body high-pressure cavity module can resist the pressure of 10MPa.
5. A test coal bed punching assembly according to claim 3, wherein: each lifter (8) adopts a double-support structure which is arranged at intervals in the front-back direction and is symmetrically arranged, each lifter (8) adopts independent hydraulic drive, and all the lifters (8) move in a synchronous lifting mode.
6. A test coal bed punching assembly according to claim 3, wherein: the main body frame (37) is formed by welding profile steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211668213.2A CN115949407A (en) | 2022-12-23 | 2022-12-23 | Coal bed punching assembly for test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211668213.2A CN115949407A (en) | 2022-12-23 | 2022-12-23 | Coal bed punching assembly for test |
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| Publication Number | Publication Date |
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| CN115949407A true CN115949407A (en) | 2023-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211668213.2A Pending CN115949407A (en) | 2022-12-23 | 2022-12-23 | Coal bed punching assembly for test |
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| Country | Link |
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| CN (1) | CN115949407A (en) |
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2022
- 2022-12-23 CN CN202211668213.2A patent/CN115949407A/en active Pending
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