CN113202435B - Pressure maintaining control device based on magnetic field effect and fidelity controller - Google Patents

Abstract

The invention discloses a pressure maintaining control device based on magnetic field effect and a fidelity controller, wherein the pressure maintaining control device based on magnetic field effect comprises: the magnetic valve comprises a magnetic valve seat, a valve clack movably connected with one end of the magnetic valve seat and a triggering magnetic part for attracting the valve clack; when the magnetic valve clack is in an open state, the triggering magnetic part is opposite to the first end face of the valve clack, the first end face is the end face, facing towards the inside of the magnetic valve seat, of the valve clack, and reliable guarantee can be provided for closing between the magnetic valve clack and the valve seat through magnetic force between the valve clack and the magnetic valve seat. The attraction between the trigger magnetic part and the valve clack can well overcome the gravity of the valve clack and the friction between the valve clack and the connecting arm. The valve seat and the valve clack can be tightly closed under different states.

Description

A pressure-holding control device and fidelity controller based on the action of magnetic field

technical field

The invention relates to the technical field of coring device sealing devices, in particular to a pressure maintaining control device and a fidelity controller based on the action of a magnetic field.

Background technique

The deep environment is complex, and in-situ fidelity (pressure, heat preservation, quality preservation, etc.) coring will try to obtain the physical environment of the in-situ rock mass as much as possible. In the deep in-situ fidelity coring, one of the cores of the pressure maintaining is the pressure maintaining controller. The existing pressure maintaining controllers mainly include ball valves, flap valves, etc. This makes the pressure-holding control of flap valve become the trend of pressure-holding in the future.

The existing flap valve relies on the triggering shrapnel and its own gravity to work together to achieve flipping and closing when working vertically. However, when coring in some environments, due to the influence of the drilling direction (horizontal, inclined), the shrapnel-gravity triggering is often impossible. Reliable, even gravity becomes an obstacle to the closure of the valve cover, and the pressure-holding effect is difficult to achieve expectations, which greatly reduces the applicable scope of the coring equipment that uses the flap valve to maintain pressure, and limits the development of pressure-maintaining coring devices, so it is urgent to develop A coring device that can be drilled in any direction to make up for the blank of the prior art.

SUMMARY OF THE INVENTION

In view of the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a pressure-holding control device and a fidelity controller based on the action of a magnetic field, which are used to solve the problem that the existing fidelity controller cannot satisfy the problem of drilling in any direction.

An embodiment of the present invention provides a pressure-holding control device based on the action of a magnetic field, which includes: a magnetic valve seat, a valve flap movably connected to one end of the magnetic valve seat, and a triggering magnetic member for attracting the valve flap; When the valve cover is in the open state, the triggering magnetic member is opposite to the first end surface of the valve cover, and the first end surface is the end surface of the valve cover facing the inside of the magnetic valve seat.

Optionally, in the pressure-holding control device based on the action of a magnetic field, the triggering magnetic member includes a first tile-type magnet, and the magnetization direction of the first tile-type magnet is an axial direction.

Optionally, in the pressure maintaining control device based on the action of a magnetic field, the magnetic valve seat includes: a cylinder body and a magnet fixed inside the cylinder body.

Optionally, in the pressure-holding control device based on the action of a magnetic field, the magnet is a cylindrical magnet.

Optionally, in the pressure-maintaining control device based on the action of a magnetic field, a first stepped portion is provided on the inner wall of the cylinder body, the cylinder body is sleeved on the outer surface of the cylinder-shaped magnet, and the cylinder body is The end portion of the cylindrical magnet abuts on the first stepped portion.

Optionally, in the pressure-holding control device based on the action of a magnetic field, the cylindrical magnet is formed by splicing four second tile-shaped magnets in the circumferential direction, and the magnetization direction of the second tile-shaped magnets is in the direction of magnetization. are the same.

Optionally, in the pressure-holding control device based on the action of a magnetic field, the magnetization direction of the second tile-shaped magnet is an axial direction.

Optionally, in the pressure maintaining control device based on the action of a magnetic field, wherein the valve flap includes: a valve flap body, a valve flap body fixed on the valve flap body for movably connecting with the open end of the magnetic valve seat. A connecting arm, and a valve disc permanent magnet fixed on the valve disc body.

Optionally, in the pressure maintaining control device based on the action of a magnetic field, the material of the magnetic valve flap is iron.

In a second aspect, a fidelity controller includes: the above-mentioned pressure-holding control device based on the action of a magnetic field.

Embodiments of the present invention provide a pressure-holding control device based on the action of a magnetic field, a magnetic valve seat, a valve flap movably connected to one end of the magnetic valve seat, and a triggering magnetic member for attracting the valve flap; the valve cover When in the open state, the triggering magnetic member is opposite to the first end surface of the valve cover, wherein the first end surface is the end surface of the valve cover facing the inside of the magnetic valve seat. By triggering the magnetic force between the magnetic element and the valve flap, a closing force is given to the magnetic valve flap, which can overcome the gravity and frictional force of the valve flap. Therefore, it can be achieved that the valve seat and the valve disc can be well closed during horizontal or oblique coring.

Description of drawings

1 is a perspective view of a pressure-holding control device based on the action of a magnetic field provided by an embodiment of the present invention;

2 is an exploded diagram of a pressure-holding control device based on the action of a magnetic field provided by an embodiment of the present invention;

3 is an exploded view of a valve cover and a magnetic valve seat provided by an embodiment of the present invention;

4 is a cross-sectional view of a barrel body provided by an embodiment of the present invention;

Fig. 5 is the enlarged view of A part in Fig. 4;

FIG. 6 is a cross-sectional view of a fidelity controller when coring is completed.

Detailed ways

The present invention provides a pressure-holding control device and a fidelity controller based on the action of a magnetic field. In order to make the purpose, technical solutions and effects of the present invention clearer and clearer, the present invention will be described in further detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. It will be understood by those skilled in the art that the singular forms "a", "an", "the" and "the" as used herein can include the plural forms as well, unless expressly stated otherwise. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of stated features, integers, steps, operations, elements and/or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components and/or groups thereof. It will be understood that when we refer to an element as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Furthermore, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combination of one or more of the associated listed items.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

As shown in FIG. 1 to FIG. 2 , an embodiment of the present invention provides a pressure-holding control device based on the action of a magnetic field, which can be used for a deep-ground pressure-holding coring and a deep-sea combustible ice pressure-holding coring device. The pressure maintaining control device includes: a magnetic valve seat 10, a valve flap 20 movably connected with the magnetic valve seat 10, and a magnetic trigger 30 opposite to the valve flap 20 when the valve flap 20 is in an open state, There is an attractive force between the magnetic trigger 30 and the valve flap 20 . The magnetic trigger 30 is a first tile-shaped magnet, and the magnetization direction of the first tile-shaped magnet is the axial direction.

In this embodiment, the magnetic trigger 30 provides the valve flap 20 with an attractive force to overcome the gravity and frictional force of the valve flap, so that the valve seat can be in different states (such as horizontal, inclined at different angles), and can be Make the disc and the valve seat fit well. That is to say, the cooperation between the valve disc and the valve seat can be no longer restricted by the state of the valve seat. At the same time, the magnetic trigger 30 can make the valve cover have a certain potential energy, the potential energy can be converted into the kinetic energy of the valve cover for release, and the valve cover uses the kinetic energy to overcome its own certain gravitational potential energy, which is conducive to the overturning and closing of the valve cover.

As shown in FIG. 3 , in an implementation manner of this embodiment, the valve flap 20 includes a valve flap body 200 , which is fixed on the valve flap body 200 for moving with the open end of the magnetic valve seat 10 The connected connecting arm 201 and the valve disc permanent magnet 202 fixed on the valve disc body 201 .

Specifically, the material of the valve disc body 200 may be the same as the material of the magnetic valve seat, or of course may be different materials. A groove 203 for fixing the permanent magnet 202 of the valve disc is opened in the middle of the valve disc body. It is easy to understand that the size of the groove 203 can be set according to actual needs.

In this embodiment, the material of the valve cover 20 is a paramagnetic material with high magnetic permeability and high compressive strength, such as an iron valve cover. The attracted permanent magnet needs a paramagnetic substance to neutralize its magnetic potential energy. According to the principle of minimum potential energy, the attracted permanent magnet can make the valve cover have a certain potential energy. To achieve the closing effect, and after the valve cover is closed, the permanent magnet inside the valve seat will also make the valve cover have a certain magnetic potential, so as to overcome the gravitational potential and achieve the effect of continuous closure. The valve seat is made of stainless steel, because stainless steel is a low magnetic permeability material, and the internal magnetic field will not generate a magnetic potential on it, which will not affect the closing trajectory of the valve cover.

Exemplarily, the shape of the groove 203 is a rectangle, a screw hole is provided at the bottom of the rectangular groove, the valve flap permanent magnet 202 is provided with a screw hole matching the screw hole on the bottom of the groove, and the screw hole is The valve flap permanent magnet 202 is fixed in the rectangular groove. It should be noted that the magnetic valve disc here refers to that the valve disc has magnetism by arranging the valve disc permanent magnet 202 on the valve disc. Of course, if necessary, the valve disc can also be processed with magnetic material. Wherein, the valve flap permanent magnet 202 can be prepared by using different permanent magnet materials according to requirements, for example, can be prepared by using rare earth permanent magnet materials. It should be noted that the valve flap permanent magnet 202 can provide a repulsive force for the valve flap body 200, that is, it can be understood that the magnetic direction of the valve flap permanent magnet is different from that of the magnetic trigger, and the valve flap permanent magnet is the valve flap The body provides a repulsive force, the magnetic trigger provides an attractive force for the valve disc body, and the valve disc body can be turned over and closed faster under the synergistic action of the above two forces.

Further, a protection sheet 204 is also provided on the valve flap, the protection sheet 204 is placed on the surface of the groove 203 and fixed by four screws, and the valve flap permanent magnet 202 inside the groove 203 is fixed. It is protected to prevent external dust and foreign matter from affecting the magnetic properties of the valve disc permanent magnet 202 .

It should be noted that when a permanent magnet is used on the valve disc to provide a repulsive force for the valve disc, combined with the attractive force provided by the triggering magnetic member to realize the rapid flipping and closing of the valve disc, due to the need to open a groove on the valve disc, The existence of the groove will reduce the overall strength of the valve disc, which is not suitable for the high-pressure environment, so you can choose a way to only trigger the magnetic piece to provide attractive force. In some special environments (the drilling angle is demanding and the pressure holding capacity is not very high), such as in the coal mine tunnel, when drilling inclined upwards, the valve cover needs to have a greater rotation and closing ability. At this time, the valve disc can be selected. The way to set the permanent magnet on it.

In this embodiment, the connecting arm 201 can be an elastic sheet, one end of the elastic sheet is fixed on the valve disc body, and the other end includes an O-shaped connection part, through which the O-shaped connection part is connected with the valve Active connection. It is easy to understand that the connection between the elastic sheet and the valve disc body is located on the same straight line as the groove 203 . That is to say, the joints between the groove 203 and the elastic sheet and the valve disc body are all located on the central axis of the valve disc body. By placing the groove 203, the elastic sheet and the valve disc body on the central axis of the valve disc body, when the magnetic valve disc is repelled by the triggering magnetic member, the magnetic valve disc will not be tilted and deflected .

In an implementation of this embodiment, the magnetic valve seat 10 includes a cylinder body 100 and a magnet 110 fixed inside the cylinder body 100 .

Specifically, referring to FIG. 5 , the barrel body 100 is a cylindrical barrel with two ends open, and the material of the barrel body 100 may be a metal material, such as cast iron, steel, and the like. One end of the barrel body 100 is provided with a concave connecting part 101, the concave connecting part 101 includes two hanging ears, and screw holes are arranged on the hanging ears, and the O-shaped connecting part of the connecting arm is arranged at the place. In the concave connecting portion 101 , the bolts pass through the screw holes on the hanging lugs and the through holes on the connecting arm in turn to connect the connecting arm and the barrel body 100 movably.

In this embodiment, the magnet 110 is a cylindrical magnet, and the cylindrical magnet may be formed by splicing at least two tile-shaped magnets in the circumferential direction, for example, four tile-shaped magnets along the circumference The magnetization directions of the tile magnets may be the same or different, and the magnetization directions include the axial magnetization direction and the radial magnetization direction. Wherein, two adjacent tile-shaped magnets among the four tile-shaped magnets may be bonded together by an adhesive. The types of adhesives used can be epoxy adhesives, and of course other types of adhesives.

Further, the number of magnets 110 can be set as required, for example, the number of tile-shaped magnets can be set to six, eight, etc., and the magnetic force direction can be flexibly adjusted by changing the magnetization direction of the tile-shaped piece. adjust.

Exemplarily, when the magnet 110 is formed by splicing six tile-shaped magnets, the magnetization directions of two adjacent tile-shaped pieces may be set to be different, or the six tile-shaped magnets may be connected to each other. The two adjacent ones are grouped into one group and divided into three groups. The magnetization direction of one group is different from the magnetization direction of the other two groups (the magnetization direction of one group is radial, and the magnetization direction of the other two groups is the radial direction. is the axial direction, or the magnetization direction of one group is the axial direction, and the magnetization direction of the other two groups is the radial direction).

In this embodiment, the material of the cylindrical magnet may be a rare earth permanent magnet material, for example, the brand name of the rare earth permanent magnet material is N52. By arranging a magnet in the valve seat, the magnetic valve flap can be tightly closed with the valve seat.

As shown in FIG. 4 , in an implementation manner of this embodiment, a first stepped portion 120 is provided on the inner wall of the cylindrical body 100 , and the first stepped portion 120 divides the inner space of the cylindrical body 100 into two parts. There are two parts (such as the first part and the second part, wherein the first part is the part close to the magnetic valve flap, and the second part is the part away from the magnetic valve flap), and the first step part 120 is located in the cylindrical shape. The upper part of the middle part of the body 100 (it can be understood that the length of the two parts divided into the inner space of the cylindrical body by the first step part 120 is different. For example, among the two parts that the first step part divides the cylindrical body into, the first part The length of the cylindrical body accounts for 1/3 of the length of the entire cylindrical body, the length of the second part accounts for 2/3 of the length of the entire cylindrical body, or the length of the first part accounts for 1/4 of the length of the entire cylindrical body, and the length of the second part accounts for 1/4 of the length of the entire cylindrical body. The length of the cylindrical body accounts for 3/4 of the length of the entire cylindrical body. During assembly, the cylindrical body 100 can be sleeved on the outer surface of the cylindrical magnet 110, and one end of the cylindrical magnet abuts against the On the first stepped portion 120 , that is, the cylindrical magnet 110 is disposed along the first stepped portion.

In this embodiment, the cylindrical magnet 110 is located in the second part. Disposing the cylindrical magnet on the second part (away from the magnetic valve flap) can avoid disturbing the opening of the magnetic valve flap during the sampling process.

Based on the same inventive concept, an embodiment of the present invention also provides a fidelity controller, in conjunction with FIG. 6 , which includes a drilling rig outer cylinder 40, a pre-tensioning rod 50, a magnetic valve flap 20, and a valve flap on the magnetic valve flap is permanently The magnet 202, the magnet 110 of the cylinder body 100 disposed in the same body 100, and the trigger magnetic member 30 for attracting the magnetic valve flap. After the coring is completed, after the magnetic valve disc 20 is not blocked, the magnetic member 30 is triggered to provide an attractive force to the magnetic valve disc, and the magnetic valve disc is turned inward (towards the inside of the valve seat), when the magnetic valve cover is in the magnetic force. After overcoming its own gravity and frictional resistance under the action of the valve seat, it moves to the mouth of the valve seat to realize the closure of the valve seat. At the same time, because the valve seat is provided with a magnet, the magnet also provides an attractive force to the magnetic valve seat, and the magnetic The bonnet is firmly attached to the mouth of the seat. It should be noted that a sealing device (not shown in the figure) is also provided at the end of the magnetic valve seat away from the magnetic valve cover, through which the magnetic valve seat can be sealed, so that the magnetic valve seat can be sealed. A closed space is formed, wherein the specific structure of the sealing device is a structure commonly used in existing fidelity controllers, and details are not repeated here.

In this embodiment, the fidelity controller is provided with a pressure-holding control device based on the action of a magnetic field. Since the valve cover of the pressure-holding control device based on the action of a magnetic field can be closed at different angles, the fidelity controller can Coring at different drilling angles greatly facilitates the coring operation, and at the same time, because the magnetic force is used, the structure of the fidelity controller can be relatively simple.

In summary, the embodiments of the present invention provide a pressure-holding control device and a fidelity controller based on the action of a magnetic field, which include: a magnetic valve seat, a valve flap movably connected to one end of the magnetic valve seat, and a magnetic valve seat for attracting The trigger magnetic member of the valve flap; when the valve cover is in an open state, the trigger magnetic member is opposite to the first end face of the valve cover, and the first end face is the valve cover facing the magnetic valve The end face inside the seat can provide a reliable guarantee for the closure between the valve disc and the valve seat through the magnetic force between the valve disc and the valve seat. At the same time, the attractive force between the triggering magnetic member and the valve flap can well overcome the gravity of the valve flap itself and the frictional force between the valve flap and the connecting arm (shrapnel). Thus, the valve seat and the valve disc can be tightly closed in different states. At the same time, the magnet inside the valve seat will also make the valve cover have a certain magnetic potential, so as to overcome the gravitational potential and achieve the effect of continuous closure.

It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above descriptions, and all these improvements and transformations should belong to the protection scope of the appended claims of the present invention.

Claims (7)

1. A pressure maintaining control device based on magnetic field action is characterized by comprising: the magnetic valve comprises a magnetic valve seat, a valve clack movably connected with one end of the magnetic valve seat and a triggering magnetic part for attracting the valve clack; when the valve clack is in an opening state, the triggering magnetic part is opposite to a first end face of the valve clack, and the first end face is an end face of the valve clack facing the inside of the magnetic valve seat;

the valve flap comprises: the valve clack permanent magnet is fixed on the valve clack body, and the valve clack permanent magnet is fixed on the valve clack body; the middle part of the valve clack body is provided with a groove for fixing the valve clack permanent magnet;

the connecting arm is an elastic sheet, one end of the elastic sheet is fixed on the valve clack body, the other end of the elastic sheet comprises an O-shaped connecting part, and the elastic sheet is movably connected with the valve seat through the O-shaped connecting part; the valve clack is an iron valve clack; the valve seat is made of stainless steel;

the magnetic valve seat includes: the magnetic cylinder comprises a cylinder body and a magnet fixed inside the cylinder body;

the magnetic direction of the valve clack permanent magnet is different from that of the trigger magnetic part.

2. The magnetic-field-effect-based dwell control device of claim 1, wherein the trigger magnetic element is a first tile-shaped magnet, and the magnetizing direction of the first tile-shaped magnet is an axial direction.

3. The magnetic-field-effect-based dwell control apparatus according to claim 1, characterized in that the magnet is a cylindrical magnet.

4. The pressure holding control device based on magnetic field action according to claim 3, wherein a first step portion is provided on an inner wall of the cylinder body, the cylinder body is fitted over an outer surface of the cylindrical magnet, and an end portion of the cylindrical magnet abuts against the first step portion.

5. The pressure holding control device based on magnetic field action according to claim 3, wherein the cylindrical magnet is formed by splicing four second tile-shaped sheet magnets in the circumferential direction, and the magnetizing directions of the second tile-shaped sheet magnets are all the same.

6. The magnetic-field-effect-based dwell control apparatus of claim 5, wherein the magnetizing direction of the second tile-shaped sheet magnet is an axial direction.

7. A fidelity controller, comprising: the magnetic field effect-based dwell control apparatus of any one of claims 1-6.

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