CN110805701A - Pressure-maintaining corer sealing valve controlled to be started by torsion spring - Google Patents
Pressure-maintaining corer sealing valve controlled to be started by torsion spring Download PDFInfo
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- CN110805701A CN110805701A CN201911172634.4A CN201911172634A CN110805701A CN 110805701 A CN110805701 A CN 110805701A CN 201911172634 A CN201911172634 A CN 201911172634A CN 110805701 A CN110805701 A CN 110805701A
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- Prior art keywords
- valve
- clack
- sealing surface
- flap
- corer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2261—Shaping or arrangements of the sealing the sealing being arranged on the valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2263—Shaping or arrangements of the sealing the sealing being arranged on the valve seat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention relates to a pressure-maintaining corer sealing valve controlled by a torsion spring to start, which comprises a flap valve, wherein the flap valve comprises a valve seat and a valve clack, one end of the valve clack is movably connected with the upper end of the valve seat through a rotating shaft, the top of the valve seat is provided with a valve port sealing surface matched with the valve clack, the valve clack is provided with a valve clack sealing surface matched with the valve port sealing surface, the rotating shaft is sleeved with a torsion spring, and the valve clack tends to close under the action of the; the valve port sealing surface is provided with a supporting surface for supporting the valve clack; when the valve flap is closed, the bottom of the valve flap rests against the bearing surface of the valve seat. The valve in the valve can be automatically closed under the action of the torsion spring without external force, and the flap valve can also be automatically closed even in a horizontal state, so that the conversion from only vertical drilling to horizontal drilling is realized; when the valve clack is closed, displacement constraint can be applied to the bottom surface and the side surface of the valve clack, so that the deformation resistance of a sealing surface can be effectively improved, the valve can bear higher pressure, and the pressure maintaining capacity of the valve is improved.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a pressure-maintaining coring device sealing valve controlled to be started by a torsion spring.
Background
Core drilling is a commonly used exploration means for geological exploration of solid minerals. The cylindrical drill bit and the drilling tool crush rock at the bottom of the hole in a circular manner along the circumference, a columnar core is reserved at the central part of the bottom of the hole, and the core is taken out from the hole to research the geology and the mineral production condition, so the drilling of the core is called core drilling.
The core barrel usually comprises a drilling machine outer barrel and a core barrel, a barrel-shaped drill bit is installed at the bottom of the drilling machine outer barrel, the core barrel is located on the inner periphery of the drilling machine outer barrel, a core catcher is arranged on the inner wall of the lower end of the core barrel, and a core enters the core barrel from the lower end of the core barrel along with the drilling of the drill bit and is gripped by the core catcher. After drilling, the core barrel is lifted upwards, and the core catcher and the core rise together with the core barrel.
In the field of pressure-holding coring, the upper end of a pressure-holding cylinder is generally sealed by a piston, and the lower end of the pressure-holding cylinder is generally sealed by a ball valve or a flap valve. The ball valve has a complex structure, occupies a large space, limits the diameter of a drilled core, has high requirements on the ball valve processing technology, and when the pressure is high, liquid in the pressure maintaining cylinder seeps out from a gap between the ball valve and the core barrel, so that the high pressure cannot be maintained; the existing flap valve is simple in structure and capable of maintaining high pressure, but is triggered by the elastic sheet, and is matched with the valve clack by the gravity of the valve clack, so that the flap valve can only drill under the condition close to the vertical condition.
Disclosure of Invention
The invention aims to provide a pressure-maintaining coring device sealing valve controlled to be started by a torsion spring, a flap valve can be automatically closed even in a horizontal state, and the transition from only vertical drilling to horizontal drilling can be realized.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the pressure-maintaining corer sealing valve controlled to be started by the torsion spring comprises a flap valve, wherein the flap valve comprises a valve seat and a valve clack, one end of the valve clack is movably connected with the upper end of the valve seat through a rotating shaft, a valve port sealing surface matched with the valve clack is arranged at the top of the valve seat, the valve clack is provided with a valve clack sealing surface matched with the valve port sealing surface, the rotating shaft is sleeved with a torsion spring, and the valve clack tends to be closed under the action of.
Furthermore, the valve port sealing surface is a conical surface, and the taper of the valve clack sealing surface is the same as that of the valve port sealing surface.
Preferably, the valve port sealing surface has a taper angle in the range of 20 ° to 55 °.
Furthermore, a bearing surface for bearing the valve clack is arranged on the valve port sealing surface; when the valve flap is closed, the bottom of the valve flap rests against the bearing surface of the valve seat.
Furthermore, a groove matched with the valve clack in a form fit mode is arranged on the valve port sealing surface to form the supporting surface, and a convex part matched with the groove is arranged at the bottom of the valve clack and is embedded into the groove when the valve clack is closed.
Further preferably, the valve port sealing surface has a taper angle of 40 ° to 50 °.
Furthermore, a boss matched with the valve clack in a shape fitting mode is arranged on the valve port sealing surface to form the supporting surface, and when the valve clack is closed, the bottom surface of the valve clack abuts against the boss.
Further preferably, the valve port sealing surface has a taper angle of 30 °.
Wherein, the sealing surface of the valve clack is embedded with a sealing element.
Or, further, at least two sealing elements are arranged in the valve port sealing surface of the valve seat.
Compared with the prior art, the invention has the following beneficial effects:
the valve in the valve can be automatically closed under the action of a torsion spring without external force, and the flap valve can also be automatically closed even in a horizontal state, so that the conversion from only vertical drilling to horizontal drilling is realized;
2, when the valve clack is closed, the invention applies displacement constraint to the bottom surface and the side surface of the valve clack, thereby effectively improving the deformation resistance of the sealing surface, enabling the valve to bear higher pressure and improving the pressure maintaining capability of the valve;
3, the valve seat and the valve clack adopt a multi-stage sealing structure, the sealing performance is reliable, the multi-line/surface sealing contact is realized, when a certain stage of sealing is leaked, other sealing pairs still keep a sealing state, and the valve leakage can be effectively prevented.
Drawings
FIG. 1 is a three-dimensional view of the flap valve closed;
FIG. 2 is a cross-sectional view of the flap valve;
FIG. 3 is a three-dimensional view of the valve seat of the second embodiment;
FIG. 4 is a sectional view of the second embodiment with the valve plate valve closed;
FIG. 5 is a three-dimensional view of the valve seat in the third embodiment;
FIG. 6 is a sectional view of a valve seat in the third embodiment;
FIG. 7 is a cross-sectional view of the valve flap of the third embodiment;
FIG. 8 is a sectional view of the third embodiment with the valve plate valve closed;
FIG. 9 is a sectional view of a valve seat in the fourth embodiment;
FIG. 10 is an enlarged view of a portion of FIG. 9 at A;
FIG. 11 is a partial cross-sectional view of the valve seat of the fourth embodiment without the seal installed;
FIG. 12 is a schematic view during valve closing in the fourth embodiment;
FIG. 13 is a partial cross-sectional view of the fourth embodiment with the valve flap closed.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.
Example one
As shown in fig. 1 and 2, the pressure-maintaining coring device sealing valve controlled by the torsion spring to be started disclosed in the embodiment comprises a flap valve, wherein the flap valve comprises a valve seat 1 and a valve clack 2, one end of the valve clack 2 is movably connected with the upper end of the valve seat 1 through a rotating shaft 6, a valve port sealing surface 11 matched with the valve clack 2 is arranged at the top of the valve seat 1, the valve clack 2 is provided with a valve clack sealing surface matched with the valve port sealing surface 11, the rotating shaft 6 is sleeved with a torsion spring 7, and the valve clack 2 tends to be closed.
In this embodiment, the valve port sealing surface 11 is a conical surface, and the taper of the valve flap sealing surface is the same as that of the valve port sealing surface 11. The sealing surface of the valve clack is embedded with a sealing piece 21.
In the use process, when the core barrel is lifted upwards to a certain height and the bottom of the core barrel passes over the valve clack 2, the valve clack 2 loses the barrier, and the torsion spring 7 releases energy to enable the valve clack 2 to reversely rotate and close to realize sealing fit with the valve seat 1, so that the sealing of the lower end of the core barrel is realized, and the liquid in the core barrel is prevented from losing; at the same time, the valve flap 2 comes into contact with the valve seat 1 increasingly tightly under the internal liquid pressure.
In the embodiment, the valve can be automatically closed under the action of the torsion spring without external force, and the flap valve can also be automatically closed even in a horizontal state, so that the transition from only vertical drilling to horizontal drilling is realized.
Example two
The difference between this embodiment and the first embodiment is: in the embodiment, a valve port sealing surface 11 is provided with a supporting surface for supporting the valve clack 2; when the valve flap 2 is closed, the bottom of the valve flap 2 rests against the bearing surface of the valve seat 1. The coefficient of friction of the bearing surface in this embodiment is 0.12-0.3.
When the valve clack 2 is closed, the invention can apply displacement restraint to the bottom surface and the side surface, thereby effectively improving the deformation resistance of the sealing surface, leading the valve to bear higher pressure and improving the pressure maintaining capability of the valve. During compression of the flap 2, the middle deforms more than the edges, causing the edges to expand outward, creating a "virtuous cycle" that is tighter and tighter.
Due to the structural particularity of the fidelity corer, the valve clack is limited by the inner cylinder and the outer cylinder of the corer, so that the thickness of the corer cannot be optimized. The valve seat 1 and the valve clack 2 are made of 20CrMnMo carburizing steel. The taper angle of the valve port sealing surface 11 ranges from 20 ° to 55 °, for example 20 °, 25 °, 30 °, 35 °, 45 °, 50 °, etc.
As shown in fig. 3 and 4, in the present embodiment, a boss 14 which is matched with the valve clack 2 in a form fit manner is arranged on the valve port sealing surface 11 to form a bearing surface, when the valve clack 2 is closed, the bottom surface of the valve clack 2 is abutted against the boss 14, and the taper angle of the valve port sealing surface 11 is 30 degrees. The sealing surface of the valve clack is embedded with a sealing piece 21.
EXAMPLE III
The difference between this embodiment and this embodiment is: as shown in fig. 5-8, in this embodiment, a groove 15 is formed on the valve port sealing surface 11 to form a bearing surface, which is matched with the valve flap 2 in a form-fitting manner, and the bottom of the valve flap 2 is provided with a protrusion 22 matched with the groove 15, and the protrusion 22 is embedded in the groove 15 when the valve flap 2 is closed. The taper angle of the valve port sealing surface 11 is 40-50 degrees.
Example four
This embodiment differs from the previous three embodiments in that: in this embodiment, when the valve flap 2 is closed, at least two sealing pairs are formed between the valve seat 1 and the valve flap 2, and the sealing between the valve seat 1 and the valve flap 2 includes hard sealing and soft sealing.
The sealing element can be arranged on the valve flap 2 or on the valve seat 1. In the present embodiment, at least two sealing members are installed in the valve port sealing surface 11 of the valve seat 1, and when the valve flap 2 contacts with the sealing members, a sealing pair is formed. The number of the sealing members is set as required, and three sealing members are mounted on the valve seat 1 in the present embodiment.
As shown in fig. 9, 10 and 11, the primary seal member 3 includes a metal seal ring 31 and a U-shaped seal structure 32, the valve port sealing surface 11 has an annular groove 12 for mounting the primary seal member 3, the U-shaped seal structure 32 and the metal seal ring 31 are mounted in the annular groove 12, and the metal seal ring 31 is located at the inner periphery of the U-shaped seal structure 32.
The U-shaped sealing structure 32 comprises a U-shaped soft sealing element 33 and a tetrafluoro sealing ring 34, the cross section of the U-shaped soft sealing element 33 is U-shaped, the tetrafluoro sealing ring 34 is arranged in a U-shaped groove of the U-shaped soft sealing element 33, and the opening of the U-shaped groove faces downwards.
As shown in fig. 9, 10, 12 and 13, the sealing surface of the metal sealing ring 31 for contacting with the valve flap 2 protrudes from the valve port sealing surface; when the valve clack 2 is closed, the valve clack 2 is in sealing contact with the metal sealing ring 31 to form a hard seal, and meanwhile, the valve clack 2 expands the metal sealing ring 31 to press the U-shaped sealing structure 32 to form a soft seal.
The valve port sealing surface 11 is a conical opening, and the metal sealing ring 31 and the valve clack 2 can be sealed by adopting line sealing or surface sealing, and the contact surface of the metal sealing ring 31 and the valve clack 2 is a conical surface in the embodiment.
As shown in fig. 10, 11 and 13, the annular groove 12 is of a stepped structure, and when the valve flap 2 is not closed, the inner annular surface of the U-shaped sealing structure 32 protrudes from the stepped surface 13 of the annular groove 12; when the flap 2 is closed, the metal sealing ring 31 is forced to expand against the step surface 13 of the annular groove 12. The U-shaped soft sealing element 33 is made of rubber, and the PTFE seal ring 34 is made of PTFE.
The second seal 4 has the same structure as the first seal 3. The first-level and second-level metal sealing rings are higher than the conical surface of the valve seat, and the valve clack 2 is only contacted with the metal sealing ring 31; the expansibility of the metal sealing ring 31 can effectively improve the deformation resistance of the sealing surface, and can compensate the deformation generated by the pressed valve clack and the valve seat in the pressing process to avoid pressure leakage.
The third sealing element 5 is also the last sealing element, the third sealing element 5 comprises a J-shaped element 51 and a sealing ring 52, and the annular groove 12 is arranged on the valve port sealing surface 11; the J-shaped piece 51 and the sealing ring 52 are arranged on the bearing surface, the J-shaped piece 51 is positioned between the sealing ring 52 and the valve seat 1, and the J-shaped piece 51 wraps part of the sealing ring 52.
When the valve flap 2 is closed, the sides of the valve flap 2 form a soft seal with the sealing ring 52 and the J-shaped element 51, and the bottom of the valve flap 2 forms a hard end-face seal with the bearing surface 112 against the bearing surface. The contact surface of the valve clack 2 and the J-shaped piece 51 is a conical surface.
In the embodiment, the valve seat and the valve clack are of a multi-stage sealing structure and are in multi-line/surface sealing contact, when a certain stage of sealing leakage occurs, other sealing pairs still keep a sealing state, the valve leakage can be effectively prevented, and the sealing performance is reliable. A hard sealing structure is arranged between the valve seat and the valve clack and can be used in high-temperature and high-pressure working conditions.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore intended that all such changes and modifications as fall within the true spirit and scope of the invention be considered as within the following claims.
Claims (10)
1. A pressure-maintaining corer sealing valve controlled by a torsion spring to start comprises a flap valve, wherein the flap valve comprises a valve seat and a valve clack, one end of the valve clack is movably connected with the upper end of the valve seat through a rotating shaft, a valve port sealing surface matched with the valve clack is arranged at the top of the valve seat, and the valve clack is provided with a valve clack sealing surface matched with the valve port sealing surface.
2. The torsion spring controlled start pressure maintaining corer sealing valve of claim 1, characterized in that: the valve port sealing surface is a conical surface, and the taper of the valve clack sealing surface is the same as that of the valve port sealing surface.
3. The dwell corer seal valve of claim 2, wherein: the cone angle range of the valve port sealing surface is 20-55 degrees.
4. The torsion spring controlled activated dwell corer seal valve of claims 1, 2 or 3, characterized in that: the valve port sealing surface is provided with a supporting surface for supporting the valve clack; when the valve flap is closed, the bottom of the valve flap rests against the bearing surface of the valve seat.
5. The dwell corer seal valve of claim 4, wherein: the valve port sealing surface is provided with a groove matched with the valve clack in a form-fitting mode to form the supporting surface, the bottom of the valve clack is provided with a convex part matched with the groove, and when the valve clack is closed, the convex part is embedded into the groove.
6. The dwell corer seal valve of claim 5, wherein: the cone angle of the valve port sealing surface is 40-50 degrees.
7. The dwell corer seal valve of claim 4, wherein: the valve port sealing surface is provided with a boss matched with the valve clack in a form-fitting mode to form the supporting surface, and when the valve clack is closed, the bottom surface of the valve clack abuts against the boss.
8. The dwell corer seal valve of claim 7, wherein: the cone angle of the valve port sealing surface is 30 degrees.
9. The dwell corer seal valve of claims 1, 2, 3, 5, 6, 7 or 8, wherein: and a sealing element is embedded on the sealing surface of the valve clack.
10. The dwell corer seal valve of claims 1, 2, 3, 5, 6, 7 or 8, wherein: at least two sealing elements are arranged in the valve port sealing surface of the valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911172634.4A CN110805701A (en) | 2019-11-26 | 2019-11-26 | Pressure-maintaining corer sealing valve controlled to be started by torsion spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911172634.4A CN110805701A (en) | 2019-11-26 | 2019-11-26 | Pressure-maintaining corer sealing valve controlled to be started by torsion spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110805701A true CN110805701A (en) | 2020-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911172634.4A Pending CN110805701A (en) | 2019-11-26 | 2019-11-26 | Pressure-maintaining corer sealing valve controlled to be started by torsion spring |
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| CN (1) | CN110805701A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911639A (en) * | 2020-07-01 | 2020-11-10 | 深圳大学 | Magnetic valve seat capable of controlling magnetic force and pressure maintaining controller |
| CN111933384A (en) * | 2020-07-01 | 2020-11-13 | 四川大学 | Magnetic field combination method for combining tile-shaped magnet into hollow cylinder, permanent magnet and application |
| WO2021103043A1 (en) * | 2019-11-26 | 2021-06-03 | 深圳大学 | Pressure maintaining coring device flap valve with multistage sealing structure |
-
2019
- 2019-11-26 CN CN201911172634.4A patent/CN110805701A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021103043A1 (en) * | 2019-11-26 | 2021-06-03 | 深圳大学 | Pressure maintaining coring device flap valve with multistage sealing structure |
| CN111911639A (en) * | 2020-07-01 | 2020-11-10 | 深圳大学 | Magnetic valve seat capable of controlling magnetic force and pressure maintaining controller |
| CN111933384A (en) * | 2020-07-01 | 2020-11-13 | 四川大学 | Magnetic field combination method for combining tile-shaped magnet into hollow cylinder, permanent magnet and application |
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