CN201031970Y - Mobile ball valve sealing pair - Google Patents
Mobile ball valve sealing pair Download PDFInfo
- Publication number
- CN201031970Y CN201031970Y CNU200720090147XU CN200720090147U CN201031970Y CN 201031970 Y CN201031970 Y CN 201031970Y CN U200720090147X U CNU200720090147X U CN U200720090147XU CN 200720090147 U CN200720090147 U CN 200720090147U CN 201031970 Y CN201031970 Y CN 201031970Y
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- valve
- seal
- valve seat
- spherical
- sealing
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- Expired - Fee Related
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Abstract
A mobile ball valve seal pair comprises a main valve body (1), a spherical valve cartridge (2) arranged in a fluid channel of the main valve body via a valve stem, as well as a seal valve seat (3) arranged at the two ends of the fluid channel of the main valve body via an end surface press ring (4). The seal valve seat (3) is an annular and spherical metal seal valve seat, and the annular seal spherical surface of the seal valve seat (3) cooperates with the spherical seal surface of the spherical valve cartridge (2) to form the seal pair. The seal pair is characterized in that the seal valve seat (3) is a piston-type mobile valve seat, and cooperates with the spherical seal surface of the spherical valve (2) in the way of axial hydraulic floating. The seal pair is provided with the appropriate structure and the reliable seal, and can avoid mechanical abrasion during opening and closing a valve and reduce the opening and closing torque of a valve, so as to meet the design requirement for the ball valve with a large nominal diameter and a high working pressure.
Description
Technical field
The utility model relates to a kind of metal hard-sealing ball valve, relates to a kind of movable ball valve sealing pair that is applicable to metal hard-sealing ball valve specifically.
Background technique
At present, at the metal hard-sealing ball valve design field, mostly the displacement of the metal hard-sealing valve seat in the valve seal pair is to adopt elastic element such as spring to promote, and the sealing surface of its open-shut device to valve (spherical valve core) is exerted pressure, to obtain the required pretightening force of valve seal.The size of this pretightening force directly influences the airtight quality of valve and the size that valve rod opens and closes moment, in actual use, if this pretightening force is excessive, the frictional force in the time of then can causing ball valve to open and close between two sealing surfaces strengthens, the keying moment of valve rod is big, directly has influence on the working life of valve; If this pretightening force is too small, can have influence on the sealing effect of valve again.Because the size of above-mentioned pretightening force is given in advance by the elasticity coefficient of elastic elements such as spring self, is uncontrollable definite value, this also just brings certain difficulty to manufacturing and designing the ball valve that nominal diameter is big, working pressure is high.
Summary of the invention
The purpose of this utility model is just at above-mentioned the deficiencies in the prior art part, according to the working principle and the characteristics of ball valve sealing pair, design a kind of rational in infrastructure, sealing is reliable, can avoid the mechanical wear that causes in the valve opening and closing process and reduce the movable ball valve sealing pair of valve opening and closing moment.This structure can satisfy the ball valve design requirement that nominal diameter is big, working pressure is high.
The purpose of this utility model realizes by following technique measures:
Movable ball valve sealing pair of the present utility model comprises main valve body and is installed in spherical valve core in the main valve body runner by valve rod, and the seal valve seat that is installed in main valve body runner two ends by the end face pressure ring, the sealing valve seat is an annular sphere metallic seal valve seat, the annular sealing surface of the seal valve seat formation sealing pair that matches with the spherical sealing surface of spherical valve core, described seal valve seat is the piston type slide and movable valve base, and this valve seat matches with the ball face sealing face of spherical valve core in the mode that axial fluid power floats.
Be processed with the passage that an end is connected with hydraulic power, the other end is connected with the hydraulic pressure cavity that is made of jointly the fitting surface between end face pressure ring and seal valve seat on the pressure ring of end face described in the utility model body.
The cross section of the annular sealing surface of the seal valve seat described in the utility model is a spheric structure; Also can adopt cone structure.
The highly pressurised liquid (medium available hydraulic oil or water) that two hydraulic piston type slide and movable valve base of the present utility model are supplied with by hydraulic pressure installation can be finished the inlet seal and the exit seal of valve respectively under the control of valve operation instruction.Its working principle and advantage are as follows: when valve closing, promote the piston type slide and movable valve base by hydraulic oil (water) and move forward the sealing surface of pressing to spherical valve core, and produce the required positive pressure of assurance valve seal; When valve opening, promoting the piston type slide and movable valve base by hydraulic oil (water) earlier carries out oppositely moving, after making spool and the sealing surface of valve seat separating, drive unit by valve drives the rotation of valve rod one spool to realize the unlatching of valve again, like this when spool rotates, the sealing surface of spool and valve seat is in separated state all the time, avoided the mechanical wear of sealing surface, also avoid the seal pressure that forms by elastic seat and the additional torque that produces, reduced to drive the required driving moment of valve and the volume and weight of drive unit.This structure can satisfy the ball valve design requirement that nominal diameter is big, working pressure is high.
Description of drawings
Accompanying drawing is a plan view of the present utility model.
Sequence number among the figure: the 1st, main valve body, the 2nd, fixed type ball valve core, the 3rd, seal valve seat, the 4th, end face pressure ring, the 5th, the passage of connection hydraulic power and hydraulic pressure cavity, the 6th, hydraulic pressure cavity.
Embodiment
The utility model is further described below with reference to example (accompanying drawing):
As shown in the figure, movable ball valve sealing pair of the present utility model comprises main valve body 1 and is installed in spherical valve core 2 in the main valve body runner by valve rod, and the seal valve seat 3 that is installed in main valve body runner two ends by end face pressure ring 4, sealing valve seat 3 is an annular sphere metallic seal valve seat, the annular sphere sealing surface of the seal valve seat 3 formation sealing pair that matches with the spherical sealing surface of spherical valve core 2, described seal valve seat 3 is the piston type slide and movable valve base, and this valve seat 3 matches with the ball face sealing face of spherical valve core 2 in the mode that axial fluid power floats.Specifically, the passage 5 that be processed with on described end face pressure ring 4 bodies that an end is connected with hydraulic power, the other end is connected with hydraulic pressure cavity 6 that fitting surface by 3 of end face pressure ring 4 and seal valve seats constitutes jointly.
Claims (4)
1. movable ball valve sealing pair, it comprises main valve body (1) and is installed in spherical valve core (2) in the main valve body runner by valve rod, and the seal valve seat (3) that is installed in main valve body runner two ends by end face pressure ring (4), sealing valve seat (3) is the ring shaped metallic seal valve seat, the annular sealing surface of seal valve seat (3) the formation sealing pair that matches with the spherical sealing surface of spherical valve core (2), it is characterized in that: described seal valve seat (3) is the piston type slide and movable valve base, and this valve seat (3) matches with the ball face sealing face of spherical valve core (2) in the mode that axial fluid power floats.
2. movable ball valve sealing pair according to claim 1 is characterized in that: be processed with on described end face pressure ring (4) body that an end is connected with hydraulic power, the other end and the passage (5) that is connected by the common hydraulic pressure cavity that constitutes of the fitting surface between end face pressure ring (4) and seal valve seat (3).
3. movable ball valve sealing pair according to claim 1 is characterized in that: the cross section of the annular sealing surface of described seal valve seat (3) is a spheric structure.
4. movable ball valve sealing pair according to claim 1 is characterized in that: the cross section of the annular sealing surface of described seal valve seat (3) is a cone structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720090147XU CN201031970Y (en) | 2007-04-24 | 2007-04-24 | Mobile ball valve sealing pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720090147XU CN201031970Y (en) | 2007-04-24 | 2007-04-24 | Mobile ball valve sealing pair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201031970Y true CN201031970Y (en) | 2008-03-05 |
Family
ID=39163861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720090147XU Expired - Fee Related CN201031970Y (en) | 2007-04-24 | 2007-04-24 | Mobile ball valve sealing pair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201031970Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363145A (en) * | 2013-07-31 | 2013-10-23 | 东方电气集团东风电机有限公司 | Hydropower station inlet ball valve high oil pressure operation hard sealing structure |
| WO2014161207A1 (en) * | 2013-04-04 | 2014-10-09 | Qiu Jinquan | New high-pressure micro-torque ball valve |
| CN107859755A (en) * | 2017-11-08 | 2018-03-30 | 东方电气集团东方电机有限公司 | A kind of globe valve overhauls sealing control method |
-
2007
- 2007-04-24 CN CNU200720090147XU patent/CN201031970Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014161207A1 (en) * | 2013-04-04 | 2014-10-09 | Qiu Jinquan | New high-pressure micro-torque ball valve |
| CN103363145A (en) * | 2013-07-31 | 2013-10-23 | 东方电气集团东风电机有限公司 | Hydropower station inlet ball valve high oil pressure operation hard sealing structure |
| CN103363145B (en) * | 2013-07-31 | 2016-09-07 | 东方电气集团东风电机有限公司 | Hydropower station water inlet ball valve height hydraulic operation hard sealing structure |
| CN107859755A (en) * | 2017-11-08 | 2018-03-30 | 东方电气集团东方电机有限公司 | A kind of globe valve overhauls sealing control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Henan Black Horse Industry Co., Ltd. Assignor: Zhao Ziguang Contract fulfillment period: 2008.12.8 to 2016.12.8 Contract record no.: 2008410000195 Denomination of utility model: Movable ball valve sealing pair Granted publication date: 20080305 License type: Exclusive license Record date: 20081212 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.12.8 TO 2016.12.8; CHANGE OF CONTRACT Name of requester: HENAN HEIMA INDUSTRY CO.,LTD. Effective date: 20081212 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080305 |