CN112945545A - Flap valve magnetic closure experimental method - Google Patents
Flap valve magnetic closure experimental method Download PDFInfo
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- CN112945545A CN112945545A CN202110347365.1A CN202110347365A CN112945545A CN 112945545 A CN112945545 A CN 112945545A CN 202110347365 A CN202110347365 A CN 202110347365A CN 112945545 A CN112945545 A CN 112945545A
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 78
- 238000002474 experimental method Methods 0.000 title claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 16
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- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 14
- 238000010998 test method Methods 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 17
- 238000012360 testing method Methods 0.000 abstract description 14
- 230000006872 improvement Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 5
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- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
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- 238000006073 displacement reaction Methods 0.000 description 7
- 238000005381 potential energy Methods 0.000 description 6
- 230000001960 triggered effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000011065 in-situ storage Methods 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 230000003993 interaction Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 239000002907 paramagnetic material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000005570 vertical transmission Effects 0.000 description 2
- 238000013473 artificial intelligence Methods 0.000 description 1
- 238000013383 initial experiment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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Abstract
The invention relates to a flap valve closeness experimental method.A sealing plate with a through hole is arranged at one end of the flap valve, which is far away from a valve clack; and after the valve clack is closed, injecting a medium into the flap valve through the through hole, and monitoring the pressure change inside the flap valve. The initial pretightening force of the flap valve is tested, so that the sealing performance of the magnetic flap valve can be more comprehensively evaluated and verified, and the improvement on the flap valve is facilitated; the spring providing initial closing power for the valve clack is replaced by the magnetic part, so that the valve clack can obtain larger kinetic energy, and the valve clack is ensured to be closed quickly by overcoming gravity or friction force, and is prevented from side turning; the invention tests the closing condition of the flap valve in different drilling directions and when the valve clack is positioned at different positions, can test the sealing performance of the flap valve under the conditions of vertical drilling, horizontal drilling, inclined drilling and the like, provides more comprehensive data support for the design and improvement of the pressure maintaining coring device, and is beneficial to the conversion from a theoretical stage to actual exploration.
Description
Technical Field
The invention relates to the technical field of pressure maintaining and coring experimental devices, in particular to a flap valve closure experimental method.
Background
The characteristics of deep rock such as physical mechanics, chemical biology and the like are closely related to the in-situ environmental conditions, the in-situ environmental loss in the coring process can cause the distortion and the irreversible change of the physicochemical property and the mechanical property of the rock core, and the key of the attack is how to obtain the in-situ rock core under the deep environmental conditions and carry out real-time loading test and analysis under the in-situ fidelity state.
In the existing in-situ fidelity coring device, a core is stored in a fidelity cabin after the core is drilled by a drilling tool, and then a sample is subjected to pressure maintaining and sealing by a fidelity cabin pressure maintaining control device.
The fidelity cabin pressure maintaining control device comprises a pressure maintaining valve, and the pressure maintaining valve comprises a ball valve, a flap valve and the like. When the core barrel is lifted to a certain height, the flap valve can be automatically closed. At present, the closing of the flap valve is mainly triggered by elasticity.
Patent document CN110847856A discloses a magnetically triggered pressure-maintaining coring apparatus flap valve structure, in which a magnetic member is disposed on a valve seat of the pressure-maintaining coring apparatus flap valve structure, and a magnetic material is disposed on a valve flap. Theoretically, the valve clack can be magnetically attracted by the valve seat under the action of no external force, and then automatic closing is realized. However, the magnetic flap valve is only in a theoretical stage, and the pressure maintaining performance of the magnetic flap valve needs to be verified and improved.
The tightness test of the conventional pressure-maintaining coring experimental device is generally performed by testing the pressure-maintaining performance of the pressure-maintaining chamber and the pressure-resisting performance of the flap valve, and examples thereof are disclosed in patent documents CN110736594A and CN 210513039U. The prior art does not test the initial pretightening force of the flap valve, is difficult to comprehensively evaluate and verify the sealing performance of the flap valve and is not beneficial to the improvement of the flap valve.
Disclosure of Invention
The invention provides a flap valve closure experimental method for solving the technical problems.
The invention is realized by the following technical scheme:
the method for testing the closeness of the flap valve comprises the following steps of arranging a sealing plate with a through hole at one end of the flap valve, which is far away from a valve clack; and after the valve clack is closed, injecting a medium into the flap valve through the through hole, and monitoring the pressure change inside the flap valve.
Furthermore, a second magnetic part is arranged on the valve clack, and a third magnetic part for attracting the valve clack is arranged on the valve seat.
Furthermore, a repulsive force is generated on the second magnetic part through the external first magnetic part to trigger the valve clack to close, and the magnetic force between the first magnetic part and the second magnetic part is monitored.
Or, a second magnetic part is arranged on the valve clack, a repulsive force is generated on the second magnetic part through an external first magnetic part to trigger the valve clack to close, and the magnetic force between the first magnetic part and the second magnetic part is monitored.
Furthermore, the magnetic force between the first magnetic part and the valve clack is adjusted by linearly moving the first magnetic part.
Preferably, the medium is a gas.
Further, the flap valve closure experiment method comprises the following steps:
s1, initial state: the core barrel is positioned in the valve seat, and the flap valve is in an open state;
s2, lifting the core barrel, and closing the valve clack;
s3, filling media into the flap valve, monitoring the internal pressure through a pressure gauge, and releasing pressure when the pressure reaches the maximum value.
Further, in S1, in the initial state, an initial closing power is applied to the valve flap through the first magnetic member, and a value of the initial closing power is measured through the pressure sensor.
Further, the flap valve closure experimental method further includes S4, changing the inclination of the valve seat, and/or rotating the valve seat about the valve seat axis to change the position of the valve flap, and then repeating S1-S3.
Further, the flap valve closeness experiment method comprises the steps of installing a valve seat on a second base, and rotationally installing the second base on a first base, wherein the first base can rotate in a first direction, the second base can rotate in a second direction relative to the first base, and the second direction is perpendicular to the first direction;
the adjustment of the inclination of the valve seat is achieved by rotating the first seat and the change of the position of the flap is achieved by rotating the second seat relative to the first seat.
Compared with the prior art, the invention has the following beneficial effects:
the initial pretightening force of the flap valve is tested, so that the sealing performance of the magnetic flap valve can be evaluated and verified more comprehensively, and the improvement of the flap valve is facilitated;
2, the spring providing initial closing power for the valve clack is replaced by a magnetic part, so that the invention has the following beneficial effects: (1) the repulsive force generated by the repulsion of the magnets is far larger than the elastic force generated by the spring, namely the magnetic potential energy generated between the magnets in the initial stage is larger, the elastic potential energy generated by the spring is smaller, and when the drilling machine drills horizontally or vertically upwards, the elastic potential energy of the spring is insufficient to provide enough energy to enable the valve clack to rotate and close by overcoming the friction force or the gravity; (2) because the valve clack is limited by the core barrel, the energy generated by the magnetic potential energy is accumulated, and the energy is completely converted into the kinetic energy of the valve clack after the core barrel is not limited, so that the valve clack obtains larger kinetic energy, and the valve clack is ensured to be closed quickly by overcoming the gravity or the friction force, and is prevented from side turning;
3, the invention tests the closing condition of the flap valve in different drilling directions and when the valve clack is positioned at different positions, can test the sealing performance of the flap valve under the conditions of vertical drilling, horizontal drilling, inclined drilling and the like, provides more comprehensive data support for the design and improvement of the pressure maintaining coring device, and is beneficial to the conversion from a theoretical stage to actual exploration;
4, the invention can detect the pretightening force generated by the valve seat on the valve clack, optimize the pretightening device in the existing fidelity cabin by detecting the pretightening force, and even remove the pretightening device.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention.
FIG. 1 is a three-dimensional view of the present invention;
FIG. 2 is a three-dimensional view of a laboratory bench inside a cabinet;
FIG. 3 is a three-dimensional view of an adjustable platform;
FIG. 4 is a schematic illustration of the use of the present invention in testing a flap valve;
FIG. 5 is a schematic view of the movable clamp and its operating mechanism;
FIG. 6 is a schematic structural view of a magnet linear displacement adjusting mechanism;
FIG. 7 is a schematic structural view of a second base;
fig. 8 is a schematic view of the structure of the flap valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings. It is to be understood that the described embodiments are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
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 present invention, it should be noted that the terms "forward direction" and "reverse direction" or the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships which are usually arranged when the product of the present invention is used, or the directions or positional relationships which are usually understood by those skilled in the art, and are only used for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element which is referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, cannot be understood as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention discloses a flap valve closeness experimental method, wherein a sealing plate with a through hole is arranged at one end of the flap valve, which is far away from a valve clack; after the valve clack is closed, a medium is injected into the flap valve through the through hole, and meanwhile, the pressure change inside the flap valve is monitored. The peak value of the air pressure and the process change rule can be automatically recorded through the control system.
The peak value of the internal air pressure of the flap valve is the initial pretightening force of the valve clack, and when the generated initial pretightening force is large, the valve clack can generate certain pressure maintaining capacity, so that the pressure maintaining effect after closing is realized.
The method can verify the initial pretightening force of the existing elastic-triggered flap valve and the magnetic-triggered flap valve.
If the flap valve is triggered by the existing elastic force, the initial pretightening force generated by the self weight of the valve clack can be verified.
If the flap valve is triggered by the existing magnetic force, the initial pretightening force generated by the magnetic part on the valve seat to the valve clack can be verified.
The invention discloses an embodiment based on the flap valve closure experimental method.
Example one
The flap valve closure experimental method is realized by flap valve closure experimental equipment.
As shown in fig. 1 and 2, the flap valve closure experimental apparatus includes a box 100 and an experimental bench. The experiment table comprises a platform 4, a valve seat fixing mechanism 6 for fixing the valve seat, and a core barrel driving mechanism 5 for driving the core barrel to lift.
The laboratory bench is placed in the box body 100, and the box body 100 is provided with an observation window. The experimental platform is placed in the box body 100, and has 3 functions: firstly, a protection function is realized, after the valve clack is closed, air pressure is adopted when the pretightening force of the valve clack is determined, and if a box body is not adopted, certain experimental danger exists when the air pressure is too high; secondly, the modularized hiding of the control mechanism is realized, and each pneumatic and electric device is arranged in the box body 100 to be packaged, so that the effects of tidiness and functional modularization are realized; the test bed not only has an experiment function, but also has a certain valve seat closing action display function, and when the experiment is not needed, the dynamic display of the closing state of the valve clack can be realized, and under the function, the platform is arranged in the box body 100, so that the external interference received in the dynamic display process can be prevented, and a high-speed image tracking system can be integrated in the box body 100, and the dynamic image collection in the closing process of the valve clack is realized.
As shown in fig. 2 and 3, the inclination of the platform 4 in this embodiment is adjustable to simulate vertical drilling, horizontal drilling, inclined drilling, etc. The platform 4 specifically includes a first base 41, a second base 42, a first rotation driving mechanism 47, and a second rotation driving mechanism 43.
A rotary shaft 44 is fixed to both sides of the first base 41, and the rotary shaft 44 is supported by a support base 45 through a bearing or a bearing holder 46. The first rotation driving mechanism 47 is connected to one of the rotation shafts 44 for rotating the first base 41 in the first direction.
The second base 42 is rotatably connected to the first base 41, the second rotation driving mechanism 43 is mounted on the first base 41, and an output end of the second rotation driving mechanism 43 is connected to the second base 42 for driving the second base 42 to rotate in the second direction relative to the first base 41. The second direction is perpendicular to the first direction.
The first and second rotary driving mechanisms 47 and 43 may be manual mechanisms or electric mechanisms. In the present embodiment, the first rotation driving mechanism 47 is a manual mechanism, and the second rotation driving mechanism 43 is an electric mechanism.
The first rotary drive mechanism 47 includes a first hand wheel 471 and a first transmission mechanism. The first transmission mechanism converts the rotational movement of the first hand wheel 471 into the rotational movement of the rotation shaft 44 and the first base 41. In this embodiment, the rotating shaft 44 is perpendicular to the axis of the first hand wheel 471, so the first transmission mechanism is a vertical transmission mechanism, and particularly, a bevel gear vertical transmission mechanism can be selected. The first hand wheel 471 is a driving wheel, the first transmission mechanism is a driven wheel, and the platform 4, the valve seat and the valve clack rotate around the rotating shaft 44 by designing a proper transmission ratio, so that the conditions of vertical drilling, horizontal drilling, inclined drilling and the like are simulated.
The second rotary drive mechanism 43 includes a motor and a gear transmission mechanism that converts the rotary motion of the motor into the rotary motion of the second base 42.
As shown in fig. 7, the second seat 42 has a circular hole 421 adapted to the valve seat, and an axis of the circular hole 421 is coaxial with a rotation center of the second seat 42. When the flap valve is mounted on the second base 42, the second rotary drive 43 operates to drive the second base 42, the valve seat and the flap to rotate synchronously about the axis of the valve seat.
The valve seat fixing mechanism 6 and the core barrel driving mechanism 5 are mounted on the second base 42.
As shown in fig. 5, the valve seat fixing mechanism 6 includes a pair of clamps, one of which is a fixed clamp 62 and the other of which is a movable clamp 61, and an operating mechanism. The operating mechanism is connected with the movable clamp 61 for operating the movable clamp 61.
The upper surface of the second base 42 is provided with a linear guide 66, and the movable clamp 61 is connected with the linear guide 66 in a sliding way. The operating mechanism comprises a handle 65, a first arm 63, a second arm 67 and a third arm 68, wherein one end of the first arm 63 is connected with the movable clamp 61, the other end of the first arm 63 is rotatably connected with one end of the second arm 67, the other end of the second arm 67 is rotatably connected with one end of the third arm 68, the other end of the third arm 68 is rotatably connected with the mounting seat 64, the mounting seat 64 is fixedly connected with the second base 42, and one end of the handle 65 is fixedly connected with the third arm 68.
By rotating the handle 65 in the forward direction or the reverse direction, the third arm 68 can be driven to rotate around the mounting seat 64, and then the first arm 63 is pulled or pushed, the movable clamp 61 moves linearly, the distance between the movable clamp 61 and the fixed clamp 62 is adjusted, and the valve seat is clamped or loosened.
The core barrel driving mechanism 5 is used to lift the core barrel. The core barrel driving mechanism 5 includes a core barrel holder 54 for holding the core barrel and a linear driving mechanism for driving the core barrel holder 54 to move linearly. The linear driving mechanism can be selected from a hydraulic cylinder, an air cylinder, a linear motor and the like.
In this embodiment, the linear driving mechanism is a linear motor, and specifically includes a motor 51, a linear guide rail 52, a slider 53, a ball screw, and the like, which is conventional in the art and will not be described herein again. The core barrel holder 54 is fixedly connected to the slide 53.
As shown in fig. 3 and 8, the flap valve includes a valve seat 1 and a valve flap 2, and the valve flap 2 is connected to one side of the top end of the valve seat 1.
The valve clack 2 is provided with a second magnetic part 9, and the valve seat 1 is provided with a third magnetic part 10 for attracting the second magnetic part 9. In another embodiment, the valve seat 1 may not have the third magnetic member 10. In order to test the sealing pressure of the flap valve conveniently, the bottom end of the valve seat 1 is connected with a sealing plate 11, and the sealing plate 11 is provided with a gas injection hole 12; when the valve clack is closed, air pressure can be injected into the valve seat 1 through the air injection hole 12, and the maximum sealing pressure can be tested by monitoring the change of the internal pressure.
In order to provide an initial closing power for the valve clack 2, the second base 42 is also provided with a first magnetic part 8 with adjustable position and a magnet linear displacement adjusting mechanism 7 for linearly adjusting the position of the first magnetic part 8. By adjusting the position of the first magnetic member 8, the repulsive force thereof to the second magnetic member 9 is adjusted. The magnetic member may be a magnet, such as a permanent magnet. The second magnetic member 9 may be embedded in the valve flap 2.
As a better alternative: the valve clack 2 is made of paramagnetic material with large magnetic conductivity and high compressive strength. The reason is that: a paramagnetic material is selected to manufacture the valve clack 2, the permanent magnet on the valve clack 2 can magnetize the valve clack 2, after the valve clack 2 is closed, the magnetic potential of the permanent magnet inside the valve seat 1 can be coupled with the magnetic potential possessed by the valve clack 2, and according to the principle of minimum potential energy, the valve clack can have a larger attraction force, so that the gravitational potential is overcome, and the effect of continuous closing is achieved. In the embodiment, iron is selected as the valve flap 2, and the valve seat 1 is selected to be stainless steel. The reason why the valve seat 1 is made of stainless steel is as follows: the stainless steel is a low-permeability substance, and the magnetic field in the stainless steel does not generate magnetic potential on the stainless steel, so that the closing track of the valve clack 2 is not influenced.
As shown in fig. 3 and 4, the magnet linear displacement adjusting mechanism 7 is mounted on the surface of the second base 42. The magnet linear displacement adjusting mechanism 7 can be a manual mechanism, and can also be an automatic mechanism such as electric, pneumatic and hydraulic mechanisms.
As shown in fig. 6, the magnet linear displacement adjusting mechanism 7 in this embodiment is a manual mechanism. The magnet linear displacement adjusting mechanism 7 comprises a second hand wheel 71 and a second transmission mechanism, and the second transmission mechanism converts the rotary motion of the second hand wheel 71 into the linear motion of the first magnetic part 8. In this embodiment, the axis of the second wheel 71 is perpendicular to the displacement direction of the first magnetic member 8, and thus the second transmission mechanism includes a worm gear transmission mechanism and a lead screw nut transmission mechanism.
(1) manually rotating the second handwheel 71 to drive the worm 72 to drive the worm wheel 73 to vertically rotate;
(2) the worm wheel 73 is arranged on the screw rod 74, and the rotating screw rod 74 drives the nut 75 to move linearly;
(3) the nut 75 transmits the movement to the magnet mounting seat 77, the pressure sensor 78 and the first magnetic member 8 through the guide rod 76;
(4) when the first magnetic member 8 meets the second magnetic member 9 on the valve flap, the homopolar magnet generates repulsion because the second magnetic member 9 is opposite to the homopolar magnet of the first magnetic member 8, pressure is generated on the pressure sensor 78, and the magnitude of the repulsion can be measured through the pressure sensor 78.
The initial acceleration can be determined by measuring the repulsive force, so that a dynamic model of the closing of the valve clack is established, and the instantaneous motion state of the valve clack in the rotating closing process is researched; furthermore, the measured repulsive force can be compared with the elastic force generated by the existing spring trigger model, and the size of the existing magnet is optimized through backstepping according to the dynamic model.
In order to realize the test of the sealing pressure, the flap valve closure experimental method further comprises a gas injection system, and the gas injection system is used for injecting gas into the closed flap valve. The gas injection system comprises a pneumatic pump, a gas injection pipe and a pressure valve, wherein the gas injection pipe is used for being connected with a gas injection hole 12 at the bottom of the valve seat in a sealing mode, and the numerical value of the pressure valve is converted into real-time data on a display screen through a computer.
The box 100 is provided with a control system, and the control system comprises a controller and a human-computer interaction module 101. The second rotary drive mechanism 43, the core barrel drive mechanism 5 and the gas injection system are all connected to the control system.
The control system can reduce the manual operation times, adopts man-machine interaction, realizes artificial intelligence operation, is convenient and quick, and reduces the experiment precision problem and the safety risk caused by manual operation in the experiment process. The functions of the control system mainly include: the core barrel is controlled to be lifted quickly, and the lifting speed can be monitored; the first base 41 and the valve seat valve clack are controlled to rotate 360 degrees around the axis of the valve seat, the closing condition of the valve clack at different positions is monitored, and the control and monitoring of the rotating angle can be realized; after the flap valve is closed, a pretightening force test can be realized, and the real-time monitoring is realized by controlling the air pressure through the man-machine interaction module.
The control of the lifting of the core barrel depends on the core barrel driving mechanism 5, and the lifting speed of the core barrel can be controlled by controlling the speed of the motor 51; naturally, the lifting speed of the core barrel can be monitored by the rotating speed of the motor.
The pumping speed of the core barrel on site can be simulated as truly as possible by adjusting the lifting speed of the core barrel; in addition, it can also be determined experimentally whether there is an optimum lifting speed.
The application method of the embodiment comprises the following steps:
1, initial state: as shown in fig. 3 and 4, the valve seat 1 of the flap valve is clamped by a fixed clamp 62 and a movable clamp 61, and the core barrel 3 is clamped by a core barrel clamp 54; in the initial state, the core barrel 3 is located in the valve seat 1, the flap 2 of the flap valve is in the open state, and the first magnetic member 8 gives an initial power to the flap 2, which can be detected by the corresponding pressure sensor 78.
2, performing an initial experiment, enabling the valve seat 1 to be axially vertical to a horizontal plane, operating the core barrel driving mechanism 5, lifting the core barrel 3, and moving the core barrel 3 out of the valve seat 1 and crossing the valve clack 2; the valve clack 2 performs variable acceleration movement under the action of the repulsive force of the first magnetic part 8 to realize rotary closing, and at the moment, a normal vertical coring state is simulated.
And 3, readjusting to an initial state, rotating the first hand wheel 471 to enable the axis of the valve seat 1 to form a certain included angle with the horizontal plane, rotating the second base 42 by a certain angle by using the control system, operating the core barrel driving mechanism 5 at the moment, lifting the core barrel 3, and when the core barrel 3 moves out of the valve seat 1, if the valve clack 2 can realize a rotary closing power process at different angles, the rotary closing experiment is successful at the moment.
After the valve clack 2 is closed, the third magnetic part 10 on the valve seat 1 can generate a pretightening force for the valve clack 2, so that the valve clack 2 generates a tight closing effect, at the moment, the inside of the valve seat 1 is filled with gas through the man-machine interaction module 101, the pressure is monitored through the pressure gauge, the real-time state of the pressure can be displayed on a display screen of the control system at the moment, the pressure is relieved after the pressure reaches the maximum value, and the control system can automatically record and display the peak value of the pressure and the process change rule.
The peak value of the internal air pressure of the valve seat 1 is the pretightening force generated by the third magnetic part 10 on the valve seat 1 to the valve clack 2, namely the initial pretightening force, when the generated initial pretightening force is large, the valve clack can generate certain pressure maintaining capacity, and the pressure maintaining effect after closing is realized.
The spring providing initial closing power for the valve clack is replaced by the magnet, repulsive force generated by repulsion of the magnets is far larger than elastic force generated by the spring, namely magnetic potential energy generated between the magnets in the initial stage is larger, and when a drilling machine drills horizontally or vertically upwards, enough energy can be provided to enable the valve clack to overcome friction force or gravity to rotate and close; in addition, the energy that the magnet produced is big enough for the valve clack is great at the rotation speed that loses behind the core barrel spacing, thereby guarantees that it is closed rapidly, prevents that the valve clack from turning on one's side.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The flap valve closure experimental method is characterized by comprising the following steps: a sealing plate with a through hole is arranged at one end of the flap valve, which is far away from the valve clack; and after the valve clack is closed, injecting a medium into the flap valve through the through hole, and monitoring the pressure change inside the flap valve.
2. The flap valve closeness experimental method according to claim 1, characterized in that: the second magnetic part is arranged on the valve clack, and the third magnetic part for attracting the valve clack is arranged on the valve seat.
3. The flap valve closeness experimental method according to claim 2, characterized in that: the first magnetic part generates repulsive force to the second magnetic part through the external first magnetic part to trigger the valve clack to close, and the magnetic force between the first magnetic part and the second magnetic part is monitored.
4. The flap valve closeness experimental method according to claim 1, characterized in that: the second magnetic part is arranged on the valve clack, repulsive force is generated on the second magnetic part through the first magnetic part outside to trigger the valve clack to close, and the magnetic force between the first magnetic part and the second magnetic part is monitored.
5. The flap valve closeness experimental method according to claim 3 or 4, characterized in that: the magnetic force between the first magnetic piece and the valve clack is adjusted by linearly moving the first magnetic piece.
6. The flap valve closeness experimental method according to claim 1, characterized in that: the medium is a gas.
7. The flap valve closeness test method according to claim 1, 2, 3, 4 or 6, characterized in that: the method comprises the following steps:
s1, initial state: the core barrel is positioned in the valve seat, and the flap valve is in an open state;
s2, lifting the core barrel, and closing the valve clack;
s3, filling media into the flap valve, monitoring the internal pressure through a pressure gauge, and releasing pressure when the pressure reaches the maximum value.
8. The flap valve closeness experimental method according to claim 7, characterized in that: in S1, in the initial state, an initial closing power is applied to the valve flap through the first magnetic member, and a value of the initial closing power is measured by the pressure sensor.
9. The flap valve closeness experimental method according to claim 7, characterized in that: s4, changing the inclination of the valve seat, and/or rotating the valve seat around the valve seat axis to change the position of the valve clack, and repeating S1-S3.
10. The flap valve closeness experimental method according to claim 9, characterized in that: mounting the valve seat on a second base, and rotatably mounting the second base on a first base, wherein the first base can rotate in a first direction, the second base can rotate in a second direction relative to the first base, and the second direction is perpendicular to the first direction;
the adjustment of the inclination of the valve seat is achieved by rotating the first seat and the change of the position of the flap is achieved by rotating the second seat relative to the first seat.
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| WO2022205682A1 (en) * | 2021-03-31 | 2022-10-06 | 深圳大学 | Magnetic closure simulation device for flap valve |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4832138A (en) * | 1987-05-13 | 1989-05-23 | Diamant Boart S.A. | Device to control the locking of a boring corer |
| CN103133710A (en) * | 2013-03-20 | 2013-06-05 | 潘健 | Self-checking type sluice valve |
| CN105067233A (en) * | 2015-07-16 | 2015-11-18 | 李治涛 | Online testing device for safety valve and online testing method thereof |
| CN206513846U (en) * | 2017-02-15 | 2017-09-22 | 福建省兴达阀门制造有限公司 | A kind of butterfly valve mechanism |
| CN108953624A (en) * | 2018-08-13 | 2018-12-07 | 四川大学 | Hauberk formula flap valve |
| CN109726230A (en) * | 2018-12-04 | 2019-05-07 | 重庆大学 | A kind of method of big data analysis model prediction engine performance |
| CN110701375A (en) * | 2019-09-18 | 2020-01-17 | 中国电建集团山东电力建设第一工程有限公司 | Butterfly valve capable of monitoring internal temperature and gas leakage |
| CN110736594A (en) * | 2019-11-26 | 2020-01-31 | 四川大学 | High-pressure sealing test chamber for deep coring device chamber body |
| CN110748653A (en) * | 2019-11-26 | 2020-02-04 | 深圳大学 | Pressure maintaining corer flap valve with multi-stage sealing structure |
| CN110749434A (en) * | 2019-11-26 | 2020-02-04 | 四川大学 | System and method for testing pressure maintaining characteristic of pressure maintaining cabin of coring device |
| WO2020034351A1 (en) * | 2018-08-13 | 2020-02-20 | 四川大学 | Rock core storage cylinder |
| CN110823119A (en) * | 2019-11-26 | 2020-02-21 | 深圳大学 | High-pressure experiment cabin measuring system based on vision-laser composite measurement |
| CN110847856A (en) * | 2019-11-26 | 2020-02-28 | 四川大学 | Flap valve structure of pressure maintaining coring device |
| CN210774670U (en) * | 2019-11-26 | 2020-06-16 | 四川大学 | Coring device pressurize cabin pressurize characteristic test system |
| CN111911639A (en) * | 2020-07-01 | 2020-11-10 | 深圳大学 | Magnetic valve seat capable of controlling magnetic force and pressure maintaining controller |
| CN111911638A (en) * | 2020-07-01 | 2020-11-10 | 深圳大学 | Pressure maintaining controller capable of drilling in any direction based on magnetic force triggering |
| CN112555495A (en) * | 2020-12-25 | 2021-03-26 | 福建福清核电有限公司 | Pneumatic regulating valve spring pre-tightening force setting device and method |
-
2021
- 2021-03-31 CN CN202110347365.1A patent/CN112945545B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4832138A (en) * | 1987-05-13 | 1989-05-23 | Diamant Boart S.A. | Device to control the locking of a boring corer |
| CN103133710A (en) * | 2013-03-20 | 2013-06-05 | 潘健 | Self-checking type sluice valve |
| CN105067233A (en) * | 2015-07-16 | 2015-11-18 | 李治涛 | Online testing device for safety valve and online testing method thereof |
| CN206513846U (en) * | 2017-02-15 | 2017-09-22 | 福建省兴达阀门制造有限公司 | A kind of butterfly valve mechanism |
| CN108953624A (en) * | 2018-08-13 | 2018-12-07 | 四川大学 | Hauberk formula flap valve |
| WO2020034351A1 (en) * | 2018-08-13 | 2020-02-20 | 四川大学 | Rock core storage cylinder |
| CN109726230A (en) * | 2018-12-04 | 2019-05-07 | 重庆大学 | A kind of method of big data analysis model prediction engine performance |
| CN110701375A (en) * | 2019-09-18 | 2020-01-17 | 中国电建集团山东电力建设第一工程有限公司 | Butterfly valve capable of monitoring internal temperature and gas leakage |
| CN110748653A (en) * | 2019-11-26 | 2020-02-04 | 深圳大学 | Pressure maintaining corer flap valve with multi-stage sealing structure |
| CN110749434A (en) * | 2019-11-26 | 2020-02-04 | 四川大学 | System and method for testing pressure maintaining characteristic of pressure maintaining cabin of coring device |
| CN110736594A (en) * | 2019-11-26 | 2020-01-31 | 四川大学 | High-pressure sealing test chamber for deep coring device chamber body |
| CN110823119A (en) * | 2019-11-26 | 2020-02-21 | 深圳大学 | High-pressure experiment cabin measuring system based on vision-laser composite measurement |
| CN110847856A (en) * | 2019-11-26 | 2020-02-28 | 四川大学 | Flap valve structure of pressure maintaining coring device |
| CN210774670U (en) * | 2019-11-26 | 2020-06-16 | 四川大学 | Coring device pressurize cabin pressurize characteristic test system |
| CN111911639A (en) * | 2020-07-01 | 2020-11-10 | 深圳大学 | Magnetic valve seat capable of controlling magnetic force and pressure maintaining controller |
| CN111911638A (en) * | 2020-07-01 | 2020-11-10 | 深圳大学 | Pressure maintaining controller capable of drilling in any direction based on magnetic force triggering |
| CN112555495A (en) * | 2020-12-25 | 2021-03-26 | 福建福清核电有限公司 | Pneumatic regulating valve spring pre-tightening force setting device and method |
Non-Patent Citations (2)
| Title |
|---|
| 刘广平 等: ""海底沉积物气密取样器翻板密封阀优化设计与实验研究"", vol. 44, no. 44, pages 104 - 108 * |
| 刘广平 等: "海底沉积物气密取样器翻板密封阀优化设计与实验研究", 《润滑与密封》, vol. 44, no. 4, pages 104 - 108 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022205682A1 (en) * | 2021-03-31 | 2022-10-06 | 深圳大学 | Magnetic closure simulation device for flap valve |
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