CN110714951A - Sphere seal structure and hydrovalve - Google Patents
Sphere seal structure and hydrovalve Download PDFInfo
- Publication number
- CN110714951A CN110714951A CN201911129147.XA CN201911129147A CN110714951A CN 110714951 A CN110714951 A CN 110714951A CN 201911129147 A CN201911129147 A CN 201911129147A CN 110714951 A CN110714951 A CN 110714951A
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- valve
- thimble
- ball
- needle
- sphere
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- 238000007789 sealing Methods 0.000 claims abstract description 93
- 239000007788 liquid Substances 0.000 claims description 27
- 238000009434 installation Methods 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 7
- 239000010720 hydraulic oil Substances 0.000 description 12
- 239000003921 oil Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
- F16K15/048—Ball features
-
- 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Taps Or Cocks (AREA)
Abstract
The application discloses sphere seal structure, including spheroid and first case, first case surface is equipped with the valve port, the diameter of valve port is less than spheroidal diameter, valve port department is equipped with the sealed face of toper, be equipped with on the sealed face of toper with the sealed face of the unanimous circular arc of spheroidal circular arc, the spheroid supports on the sealed face of circular arc to form seal structure. The spherical sealing structure and the hydraulic valve provided by the invention are reasonable in design and simple in structure, and can realize sealing under ultrahigh pressure and multi-dust working conditions.
Description
Technical Field
The invention relates to the technical field of ultrahigh-voltage components, in particular to a sphere sealing structure and a hydraulic valve.
Background
The hydraulic valve is an automatic element operated by pressure oil, is controlled by the pressure oil of a distribution valve, and can be used for controlling the on-off of oil, gas and water pipeline systems. The common structure of the hydraulic valve is: the front end of the flow passage of the valve core is provided with a ball, when hydraulic oil flows in the positive direction, the flowing pressure of fluid can flush the ball, and the hydraulic oil can flow normally; when the hydraulic oil reversely flows, the ball body can block the flow passage to form a stop effect, and the hydraulic oil is prevented from reversely flowing. For the ultrahigh pressure working condition, because the O-shaped ring is violently impacted by high-pressure hydraulic oil, the O-shaped ring is easily washed away, when the ball body returns to the sealing position, the high-pressure oil is leaked due to the lack of the sealing of the O-shaped ring, so that the sealing of the O-shaped ring is failed in the static state, and only a hard sealing structure can be adopted between the valve core and the ball body.
At present, hard sealing structures of valve cores and spheres are mainly divided into three types: the first is that the edge of the valve port of the overflowing channel port of the valve core is abutted with a ball body to form linear sealing, but the edge of the valve port is easy to generate a notch in the processing process, so that the sealing is failed; the second is that a conical sealing surface is arranged at an overflowing channel port of the valve core to form line sealing with the ball body, but because the sealing line cannot be processed to be completely matched with the ball body when the conical sealing surface of the valve core is processed, a small gap exists at the annular line sealing part formed by the ball body and the conical sealing surface, and complete sealing cannot be ensured; the third is that the large-area arc sealing surface consistent with the arc surface of the ball is arranged at the overflowing channel port of the valve core to form surface sealing with the ball, but in the field of coal mines and the like, the hydraulic oil usually contains dust, and because the contact area of the ball and the arc sealing surface is large, the dust is easily accumulated on the contact surface of the ball and the arc sealing surface, and further sealing failure is caused.
Disclosure of Invention
Aiming at the problems, the invention provides a spherical sealing structure and a hydraulic valve, which are reasonable in design and simple in structure and can realize sealing under ultrahigh pressure and multi-dust working conditions.
The technical scheme adopted by the invention is as follows: the invention provides a sphere sealing structure which comprises a sphere and a first valve core, wherein a valve port is arranged on the surface of the first valve core, the diameter of an inner hole of the valve port is smaller than that of the sphere, a conical sealing surface is arranged at the valve port, a small-area arc sealing surface consistent with the arc surface of the sphere is arranged on the conical sealing surface, and the sphere is abutted against the small-area arc sealing surface to form a sealing structure.
In an embodiment of the present invention, the small-area arc sealing surface is disposed in the middle of the conical sealing surface.
In an embodiment of the present invention, the number of the valve ports on the first valve core is two, the two valve ports are correspondingly disposed on two end surfaces of the first valve core, and the two valve ports are mutually communicated to form a first channel; the first valve core is also provided with a plurality of first liquid outlet channels communicated with the first channels.
In an embodiment of the present invention, the tapered sealing surface and the arc sealing surface are in smooth transition.
The invention also provides a hydraulic valve, which comprises a first thimble, a second thimble, a third thimble and the sphere sealing structure, wherein the first thimble, the second thimble and the third thimble are assembled concentrically, the first thimble is movably inserted into the first channel, and a first sphere and a second sphere are respectively arranged between the first thimble and the second thimble and between the first thimble and the third thimble so as to respectively plug two valve ports of the first valve core;
applying an external force to the second thimble, wherein the second thimble props against the first ball body, so that the first ball body blocks the valve port on one side of the first valve core, the first ball body props against the first thimble, so that the first thimble props against the second ball body, and the valve port on the other side of the first valve core is opened;
and applying an external force to the third thimble, wherein the third thimble props against the second ball body, so that the second ball body blocks the valve port on the other side of the first valve core, the second ball body props against the first thimble, so that the first thimble props open the first ball body, and the valve port on one side of the first valve core is opened.
In an embodiment of the present invention, when the first ball and the second ball are both blocked at the valve port of the first valve element, a distance between the first ball and the second ball is L1The length of the first thimble is L2The length of the first channel is L3，L1＜L2＜L3。
In an embodiment of the invention, the second thimble and/or the third thimble are/is provided with a limiting groove for accommodating the ball, and a depth of the limiting groove is smaller than a diameter of the ball.
In an embodiment of the present invention, the hydraulic valve further includes a valve seat, a second valve element, a third valve element, a fourth valve element, and a spring, wherein an installation cavity is disposed in the valve seat, the second valve element, the first valve element, the third valve element, and the fourth valve element are sequentially and fixedly disposed in the installation cavity, one side of the second valve element, which is close to the first valve element, is provided with an installation groove, the second pin and the spring are both disposed in the installation groove, the spring drives the second pin to move in the direction of the first sphere, the third valve element and the fourth valve element are both provided with a through second channel, the third pin is movably inserted into the second channel, and the third pin is driven by an external force to move in the direction of the second sphere; the valve seat is provided with a liquid inlet channel, a liquid return channel and a second liquid outlet channel which are respectively communicated with valve ports on two sides of the first valve core, and the second liquid outlet channel is arranged relative to the first liquid outlet channel.
In an embodiment of the invention, a fixed column is disposed at a position of the second thimble close to the second valve core, the spring is sleeved on the fixed column, two ends of the spring respectively abut against the bottom of the mounting groove and the second thimble, the second thimble is provided with a limit groove for accommodating the ball, and the bottom of the limit groove of the second thimble is of a conical structure, a round bottom structure or a flat bottom structure.
In an embodiment of the present invention, sealing members are disposed between the third needle and the third valve element, between the third needle and the fourth valve element, between the first valve element and the valve seat, between the second valve element and the valve seat, between the third valve element and the valve seat, and between the fourth valve element and the valve seat.
The invention has the beneficial effects that: the invention provides a sphere sealing structure and a hydraulic valve, wherein a valve port of a first valve core is provided with a conical sealing surface, and the conical sealing surface is provided with an arc sealing surface, so that the sphere can be abutted against the arc sealing surface when sealing the valve port to form surface sealing.
Drawings
FIG. 1 is a schematic cross-sectional view of a first valve cartridge of the present invention;
FIG. 2 is an enlarged partial view of one embodiment at A of FIG. 1;
FIG. 3 is a schematic structural diagram of the first ball and the second ball of the present invention respectively blocking two valve ports of the first valve core;
FIG. 4 is a schematic cross-sectional view of a hydraulic valve of the present invention;
fig. 5 is a partially enlarged view at B in fig. 4.
The figures are numbered: 1. a first valve spool; 3. a first thimble; 4. a second thimble; 5. a third thimble; 6. a valve seat; 7. a second valve core; 8. a third valve core; 9. a fourth valve spool; 10. a spring; 11. a valve port; 12. a tapered sealing surface; 13. a circular arc sealing surface; 14. a first channel; 15. a first liquid outlet channel; 21. a first sphere; 22. a second sphere; 23. a seal member; 41. a limiting groove; 42. fixing a column; 61. a liquid inlet channel; 62. a liquid return channel; 63. a second liquid outlet channel; when the first ball body and the second ball body are blocked on the valve port of the first valve core, the distance between the first ball body and the second ball body is L1(ii) a The length of the first thimble is L2(ii) a The length of the first channel is L3。
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown.
Referring to fig. 1-5, the present invention provides a sphere sealing structure, which includes a sphere and a first valve core 1, wherein a valve port 11 is disposed on a surface of the first valve core 1, a diameter of an inner hole of the valve port 11 is smaller than a diameter of the sphere, a conical sealing surface 12 is disposed at the valve port 11, an arc sealing surface 13 corresponding to an arc surface of the sphere is disposed on the conical sealing surface 12, a crack is not easily generated at the arc sealing surface 13, and the sphere abuts against the arc sealing surface 13 to form a sealing structure. During spheroid shutoff valve port 11, the spheroid can the butt on circular arc sealing surface 13, in order to form the face sealed, sealing structure is reliable, and for the direct mode that sets up circular arc sealing surface 13 in valve port 11 department, set up the mode of circular arc sealing surface 13 on sealed 12 of toper, make the spheroid littleer with the sealed area of circular arc sealing surface 13, when containing the dust in hydraulic oil usually, because the spheroid is less with the area of contact of circular arc sealing surface 13, the dust is difficult to pile up on the sphere and the sealed contact surface of circular arc sealing surface 13, and then guarantee sealed effect, realize the sealed of superhigh pressure and many dust operating modes.
The sealed face 13 of circular arc locates the middle part of the sealed face 12 of toper, and when the spheroid was stifled in valve port 11 department, the spheroid stretched into in the first case 1 for the spheroid was more firm with the sealed face 13's of circular arc seal structure, and the spheroid is difficult to be broken away by high-pressure hydraulic oil, and the spheroid is difficult to the off normal at the repeated in-process of opening and close, and then guarantees spheroidal reliability that resets. The middle of the conical sealing surface 12 is not the exact middle of the conical sealing surface 12, but is the position between the two ends of the conical sealing surface 12. In one embodiment, the arc sealing surface 13 is disposed in the middle of the conical sealing surface 12, and after the conical sealing surface 12 is disposed at the valve port 11, the ball is pressed out of the arc sealing surface 13 on the conical sealing surface 12, and the pressed arc sealing surface 13 can not only fit the surface of the ball, but also because the ball and the first valve element are both made of hard materials, the pressed arc surface of the ball is not deep, and it is ensured that the contact area between the ball and the arc sealing surface 13 is small on the premise that the ball and the arc sealing surface 13 are in surface sealing.
In one embodiment, the number of the valve ports 11 on the first valve core 1 is two, the two valve ports 11 are correspondingly arranged on two end surfaces of the first valve core 1, and a first channel 14 is formed between the two valve ports 11; the first valve core 1 is also provided with a plurality of first liquid outlet channels 15 communicated with the first channel 14. Structures sealed with the sphere are arranged at the two valve ports 11 of the first valve core 1, and the on-off of the high-pressure hydraulic oil is controlled by plugging and closing the two valve ports 11 of the first valve core 1. After entering from the valve port 11, the high-pressure hydraulic oil flows into the first liquid outlet channel 15 through the first channel 14 to be discharged.
The conical sealing surface 12 and the arc sealing surface 13 are in smooth transition, the ball body can continuously impact the conical sealing surface 12 and the arc sealing surface 13 in the repeated opening and closing process, and the adjacent part of the conical sealing surface 12 and the arc sealing surface 13 is not easy to break.
The invention also provides a hydraulic valve, which comprises a first thimble 3, a second thimble 4, a third thimble 5 and the sphere sealing structure, wherein the first thimble 3, the second thimble 4 and the third thimble 5 are concentrically assembled, the first thimble 3 is movably inserted in the first channel 14, and a first sphere 21 and a second sphere 22 are respectively arranged between the first thimble 3 and the second thimble 4 and between the first thimble 3 and the third thimble 5 so as to respectively seal two valve ports 11 of the first valve core 1;
applying an external force to the second thimble 4, enabling the second thimble 4 to prop against the first ball 21, so that the first ball 21 blocks the valve port 11 on one side of the first valve core 1, enabling the first ball 21 to prop against the first thimble 3, enabling the first thimble 3 to prop open the second ball 22, and enabling the valve port 11 on the other side of the first valve core 1 to be opened;
an external force is applied to the third thimble 5, the third thimble 5 abuts against the second ball 22, so that the second ball 22 blocks the valve port 11 on the other side of the first valve core 1, the second ball 22 abuts against the first thimble 3, so that the first thimble 3 ejects the first ball 21, and the valve port 11 on one side of the first valve core 1 is opened.
When the first ball 21 and the second ball 22 are blocked on the valve port 11 of the first valve core 1, the distance between the first ball 21 and the second ball 22 is L1The length of the first thimble 3 is L2The length of the first channel 14 is L3，L1＜L2＜L3When the first ball 21 blocks the valve port 11 on one side, the first pin 3 can be driven to push the second ball 22 to leave the valve port 11 on the other side, so that the valve port 11 on the other side is opened; when the second sphere 22 blocks the valve port 11 on the other side, the first needle 3 can be driven to push the first sphere 21 to leave the valve port 11 on one side, so that the valve port 11 on one side is opened.
The second thimble 4 and/or the third thimble 5 are/is provided with a limiting groove 41 for accommodating the ball, and the depth of the limiting groove 41 is smaller than the diameter of the ball. The limiting groove 41 is arranged to limit the position of the ball body in the repeated opening and closing process so as to prevent the ball body from deviating and affecting the sealing effect of the ball body.
The hydraulic valve further comprises a valve seat 6, a second valve core 7, a third valve core 8, a fourth valve core 9 and a spring 10, wherein an installation cavity is formed in the valve seat 6, the second valve core 7, the first valve core 1, the third valve core 8 and the fourth valve core 9 are sequentially and fixedly arranged in the installation cavity, one side, close to the first valve core 1, of the second valve core 7 is provided with an installation groove, a second thimble 4 and the spring 10 are arranged in the installation groove, the spring 10 drives the second thimble 4 to move towards the direction of the first ball body 21, the third valve core 8 and the fourth valve core 9 are provided with a through second channel, the third thimble 5 is movably inserted into the second channel, and the third thimble 5 is driven to move towards the direction of the second ball body 22 by external force; the valve seat 6 is provided with a liquid inlet channel 61, a liquid return channel 62 and a second liquid outlet channel 63 which are respectively communicated with the valve ports 11 at the two sides of the first valve core 1, the second liquid outlet channel 63 is arranged relative to the first liquid outlet channel 15, and the second liquid outlet channel 63 is shown by a dotted line in fig. 4. When high-pressure hydraulic oil needs to enter from the liquid inlet channel 61, an external force is applied to the third thimble 5, the third thimble 5 butts against the second ball 22 to block the valve port 11 on the other side of the first valve core, meanwhile, the second ball 22 pushes the first thimble 3 to jack the first ball 21, high-pressure oil can enter from the opened valve port 11 on one side of the first valve core, and at the moment, the spring 10 is in a compressed state; when the high-pressure hydraulic oil needs to flow out of the liquid return channel 62, the external force applied to the third thimble 5 is removed, the spring 10 resets to drive the first ball 21 to block the valve port 11 on one side of the first valve core, and simultaneously the first ball 21 pushes the first thimble 3 to jack the second ball 22, so that the high-pressure oil can enter from the opened valve port 11 on the other side of the first valve core and then flows out of the liquid return channel 62.
A fixing column 42 is arranged at a position, close to the second valve core 7, of the second thimble 4, the spring 10 is sleeved on the fixing column 42, two ends of the spring 10 respectively abut against the bottom of the mounting groove and the second thimble 4, a limiting groove 41 for accommodating a ball is arranged on the second thimble 4, and the bottom of the limiting groove 41 of the second thimble 4 is of a conical structure, a round bottom structure or a flat bottom structure. The groove bottom of the limiting groove 41 is in a conical structure as shown in fig. 5, and the round bottom structure and the flat bottom structure are not shown.
The sphere sealing structure is not limited to application in the hydraulic valve, and can be applied to other structures needing to be matched with the sphere sealing.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields and are included in the scope of the present invention.
Claims (10)
1. The sphere sealing structure is characterized by comprising a sphere and a first valve core, wherein a valve port is arranged on the surface of the first valve core, the diameter of an inner hole of the valve port is smaller than that of the sphere, a conical sealing surface is arranged at the valve port, an arc sealing surface consistent with the arc surface of the sphere is arranged on the conical sealing surface, and the sphere abuts against the arc sealing surface to form the sealing structure.
2. The ball seal arrangement of claim 1, wherein said radiused sealing surface is disposed at a mid-portion of said tapered sealing surface.
3. The sphere sealing structure according to claim 1, wherein the number of the valve ports on the first valve core is two, two valve ports are correspondingly arranged on two end faces of the first valve core, and a first channel is formed by the two valve ports which are communicated with each other; the first valve core is also provided with a plurality of first liquid outlet channels communicated with the first channels.
4. The ball seal arrangement of claim 1, wherein said conical seal surface transitions smoothly with said radiused seal surface.
5. A hydraulic valve, comprising a first needle, a second needle, a third needle, and the ball seal structure according to any one of claims 1 to 4, wherein the first needle, the second needle, and the third needle are assembled concentrically, the first needle is movably inserted into the first channel, and a first ball and a second ball are respectively disposed between the first needle and the second needle, and between the first needle and the third needle, so as to respectively seal off two valve ports of the first valve core;
applying an external force to the second thimble, wherein the second thimble props against the first ball body, so that the first ball body blocks the valve port on one side of the first valve core, the first ball body props against the first thimble, so that the first thimble props against the second ball body, and the valve port on the other side of the first valve core is opened;
and applying an external force to the third thimble, wherein the third thimble props against the second ball body, so that the second ball body blocks the valve port on the other side of the first valve core, the second ball body props against the first thimble, so that the first thimble props open the first ball body, and the valve port on one side of the first valve core is opened.
6. The hydraulic valve of claim 5, wherein the first ball and the second ball are spaced apart by a distance L when both the first ball and the second ball are blocked at the valve port of the first spool1The length of the first thimble is L2The length of the first channel is L3，L1＜L2＜L3。
7. The hydraulic valve according to claim 5, wherein the second needle and/or the third needle is provided with a limiting groove for accommodating the ball, and the depth of the limiting groove is smaller than the diameter of the ball.
8. The hydraulic valve according to claim 5, further comprising a valve seat, a second valve element, a third valve element, a fourth valve element and a spring, wherein an installation cavity is formed in the valve seat, the second valve element, the first valve element, the third valve element and the fourth valve element are sequentially and fixedly arranged in the installation cavity, an installation groove is formed in one side, close to the first valve element, of the second valve element, the second thimble and the spring are arranged in the installation groove, the spring drives the second thimble to move towards the first sphere, the third valve element and the fourth valve element are provided with a through second channel, the third thimble is movably inserted into the second channel, and the third thimble is driven to move towards the second sphere by external force; the valve seat is provided with a liquid inlet channel, a liquid return channel and a second liquid outlet channel which are respectively communicated with valve ports on two sides of the first valve core, and the second liquid outlet channel is arranged relative to the first liquid outlet channel.
9. The hydraulic valve according to claim 8, wherein a fixed post is disposed on the second needle close to the second valve core, the spring is sleeved on the fixed post, two ends of the spring respectively abut against the bottom of the mounting groove and the second needle, and a limiting groove for accommodating the ball is disposed on the second needle; the bottom of the limiting groove of the second thimble is of a conical structure, a round bottom structure or a flat bottom structure.
10. The hydraulic valve of claim 8, wherein seals are disposed between the third needle and the third spool, between the third needle and the fourth spool, between the first spool and the valve seat, between the second spool and the valve seat, between the third spool and the valve seat, and between the fourth spool and the valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911129147.XA CN110714951A (en) | 2019-11-18 | 2019-11-18 | Sphere seal structure and hydrovalve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911129147.XA CN110714951A (en) | 2019-11-18 | 2019-11-18 | Sphere seal structure and hydrovalve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110714951A true CN110714951A (en) | 2020-01-21 |
Family
ID=69215258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911129147.XA Pending CN110714951A (en) | 2019-11-18 | 2019-11-18 | Sphere seal structure and hydrovalve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110714951A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673803A (en) * | 2022-03-21 | 2022-06-28 | 北京天玛智控科技股份有限公司 | Water-based pilot valve for mine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201916270U (en) * | 2011-01-11 | 2011-08-03 | 郑州煤矿机械集团股份有限公司 | Low-flow four-position four-way valve |
| CN102536275A (en) * | 2012-01-12 | 2012-07-04 | 中煤北京煤矿机械有限责任公司 | Manual reversing main operation valve for hydraulic support of thin seam |
| CN104110413A (en) * | 2014-06-19 | 2014-10-22 | 广东华液动力科技有限公司 | Valve pair structure |
| CN204140969U (en) * | 2014-09-24 | 2015-02-04 | 广东华液动力科技有限公司 | One-way valve |
| CN211231067U (en) * | 2019-11-18 | 2020-08-11 | 杭州富阳孙氏机床有限公司 | Sphere seal structure and hydrovalve |
-
2019
- 2019-11-18 CN CN201911129147.XA patent/CN110714951A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201916270U (en) * | 2011-01-11 | 2011-08-03 | 郑州煤矿机械集团股份有限公司 | Low-flow four-position four-way valve |
| CN102536275A (en) * | 2012-01-12 | 2012-07-04 | 中煤北京煤矿机械有限责任公司 | Manual reversing main operation valve for hydraulic support of thin seam |
| CN104110413A (en) * | 2014-06-19 | 2014-10-22 | 广东华液动力科技有限公司 | Valve pair structure |
| CN204140969U (en) * | 2014-09-24 | 2015-02-04 | 广东华液动力科技有限公司 | One-way valve |
| CN211231067U (en) * | 2019-11-18 | 2020-08-11 | 杭州富阳孙氏机床有限公司 | Sphere seal structure and hydrovalve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673803A (en) * | 2022-03-21 | 2022-06-28 | 北京天玛智控科技股份有限公司 | Water-based pilot valve for mine |
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