CN102588662B - Pneumatic actuator of valve - Google Patents
Pneumatic actuator of valve Download PDFInfo
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- CN102588662B CN102588662B CN 201210070596 CN201210070596A CN102588662B CN 102588662 B CN102588662 B CN 102588662B CN 201210070596 CN201210070596 CN 201210070596 CN 201210070596 A CN201210070596 A CN 201210070596A CN 102588662 B CN102588662 B CN 102588662B
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- valve
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- cylinder
- housing
- pneumatic actuator
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Abstract
The invention relates to a pneumatic actuator of a valve, which comprises a casing and an air cylinder. The casing is provided with a connector fixedly connected with the valve, and the air cylinder is fixedly mounted on the casing. One end of a piston rod is fixedly connected with a piston in the air cylinder, and the other end of the piston rod is fixedly connected with a valve stem through a drive device in the casing. The pneumatic actuator is characterized in that a safety lock is arranged on the piston rod and is locked and controlled by signals of a pressure switch of a pressure sensor in a controlled container (digester) and signals of an off travel switch. When the internal pressure of the controlled container (digester) exceeds the set pressure or when a controlled valve is switched off, the pressure switch and the off travel switch are cut off, a lock control electromagnetic valve is powered off, a control spring pushes a lock bar to butt against the lower end face of a lock block, and the safety lock is locked to prevent the piston rod from moving and avoid error action of an overhead valve of the digester. Accordingly, the pneumatic actuator of the valve has the advantages of high control safety and reliability and the like, and is suitable to be used with the overhead valve of the pulp digester.
Description
Technical field
The present invention relates to valve positioner, particularly about a kind of valve used pneumatic actuator.The present invention is applicable to the pneumatic actuator of overhead valve of pulp digester.
Background technique
In paper technology, digester is the raw material such as wood chip to be become the key equipment of paper pulp by chemical reaction, in order to prevent that in digester, dielectric leakage causes environmental pollution, to the sealability of digester overhead-valve with control reliability very high requirement is arranged.At present, the keying of digester overhead-valve generally adopts pneumatic actuator to control, and pneumatic actuator is by the master control electromagnetic valve, and the source of the gas by master control electromagnetic valve pneumatic actuator reaches the control to the digester overhead-valve.But the working state of existing pneumatic actuator is fully by the master control electromagnetic valve, and when the master control electromagnetic valve received error signal, pneumatic actuator also can drive the digester overhead-valve and produce misoperation, and its safety reliability is poor.
Summary of the invention
The objective of the invention is the problem for the prior art existence, a kind of misoperation of digester overhead-valve, valve used pneumatic actuator that control security is good, reliability is high of preventing is provided.
technological scheme of the present invention comprises housing, cylinder, housing is provided with the link that is fixedly connected with valve, cylinder is fixedly mounted on housing, piston in one end of piston rod and cylinder is fixedly connected with, the other end is fixedly connected with valve rod by the transmission device in housing, mainly to be provided with safety lock on piston rod, this safety lock is by locking bar, lock dog and control cylinder form, lock dog is fixedly mounted on the piston rod end, locking bar is hinged in housing by rotating shaft away from cylinder end, one end of the nearly cylinder end of locking bar and control piston bar is hinged, control piston in the other end of control piston bar and control cylinder is fixedly connected with, the rod chamber of control cylinder is connected with an end of suction tude, the other end of suction tude is connected in the outlet that control latching solenoid valve dead electricity closes, in the rodless cavity of control cylinder, control spring is housed, control cylinder is fixedly mounted on the housing outer wall.
In above technological scheme, be connected in series the pressure switch normally closed interlock on the control power supply of control latching solenoid valve, closing valve position position limit switch normally closed interlock, closing a unlock button switch in parallel on valve position position limit switch normally closed interlock.
In above technological scheme, a unlocking signal switch and block signal switch are installed on the housing in the middle part of locking bar.
Advantage of the present invention is to be provided with safety lock on piston rod, this safety lock is controlled by pressure switch signal and the pass valve position position limit switch semaphore lock of controlled container (digester) pressure sensor, when controlled container (digester) internal pressure surpasses setting pressure or controlled valve closing state, pressure switch and pass valve position position limit switch disconnect, make control latching solenoid valve dead electricity, control spring promotes locking bar and withstands the lock dog lower end surface, safety lock is in blocking, forbid that piston rod moves, prevent the misoperation of digester overhead-valve, its control security is good, reliability is high.
Description of drawings
Fig. 1 is structural representation of the present invention.
Embodiment
Valve used pneumatic actuator as shown in Figure 1, comprise housing 3, cylinder 1, housing 3 is provided with the link that is fixedly connected with valve, cylinder 1 is fixedly mounted on housing 3, piston in one end of piston rod 2 and cylinder 1 is fixedly connected with, the other end is fixedly connected with the valve rod of controlled valve by the transmission device that is arranged in housing 3, piston rod 2 is to the interior indentation of cylinder 1 when the valve closing state, during valve opening state, piston rod 2 is from the interior release of cylinder 1, and the work source of the gas of cylinder 1 is by the master control electromagnetic valve.Be provided with safety lock on piston rod 2, this safety lock is comprised of locking bar 4, lock dog 11 and control cylinder 9, and lock dog 11 is fixedly mounted on piston rod 2 ends, and locking bar 4 is hinged in housing 3 by rotating shaft 8 away from cylinder 1 end, be that rotating shaft 8 is fixedly mounted on housing 3 inwalls, locking bar 4 can rotate in rotating shaft 8.One end of nearly cylinder 1 end of locking bar 4 and control piston bar 10 is hinged, control piston in the other end of control piston bar 10 and control cylinder 9 is fixedly connected with, the rod chamber of control cylinder 9 is connected with an end of suction tude, the other end of suction tude is connected in the outlet that control latching solenoid valve dead electricity closes, close when namely controlling the latching solenoid valve dead electricity cut off source of the gas, open on the port that is communicated with source of the gas when electric.Control spring 5 is housed in the rodless cavity of control cylinder 9, control cylinder 9 is fixedly mounted on housing 3 outer walls, when control latching solenoid valve dead electricity, the rod chamber of control cylinder 9 and source of the gas cut off, control spring 5 promotes control piston bar 10 and locking bar 4 is withstood on the lower end surface of lock dog 11, lock piston bar 2, even when the master control solenoid valve sends error signal, the digester overhead-valve can misoperation yet.
Be connected in series the pressure switch normally closed interlock on the control power supply of control latching solenoid valve, closing valve position position limit switch normally closed interlock, closing a unlock button switch in parallel on valve position position limit switch normally closed interlock.When the digester internal pressure surpassed setting pressure, the pressure transducer output signal disconnected the normally closed interlock of pressure switch, and safety lock is in the lock state.Described pass valve position position limit switch normally closed interlock, the switch contacts that disconnects when namely valve closing puts in place, this moment, safety lock was in the lock state.The unlock button switch is the normally open contact switch, opens before valve first by the unlock button switch, and its normally open contact is closed, makes safety lock be in released state.
One unlocking signal switch 6 and block signal switch 7 are installed on the housing 3 at locking bar 4 middle parts, when safety lock is in released state, unlocking signal switch 6 is connected the release pilot lamp power, and when safety lock was in the lock state, block signal switch 7 was connected the locking pilot lamp power.
Claims (3)
1. valve used pneumatic actuator, comprise housing (3), cylinder (1), housing (3) is provided with the link that is fixedly connected with valve, cylinder (1) is fixedly mounted on housing (3), piston in one end of piston rod (2) and cylinder (1) is fixedly connected with, the other end is fixedly connected with the valve rod of controlled valve by the transmission device that is arranged in housing (3), it is characterized in that being provided with safety lock on piston rod (2), this safety lock is by locking bar (4), lock dog (11) and control cylinder (9) form, lock dog (11) is fixedly mounted on piston rod (2) end, locking bar (4) is hinged in housing (3) by rotating shaft (8) away from an end of cylinder (1), nearly cylinder (1) end of locking bar (4) is hinged with an end of control piston bar (10), control piston in the other end of control piston bar (10) and control cylinder (9) is fixedly connected with, the rod chamber of control cylinder (9) is connected with an end of suction tude, the other end of suction tude is connected in the outlet that control latching solenoid valve dead electricity closes, control spring (5) is housed in the rodless cavity of control cylinder (9), control cylinder (9) is fixedly mounted on housing (3) outer wall.
2. valve used pneumatic actuator according to claim 1, it is characterized in that controlling on the control power supply of latching solenoid valve and be connected in series the pressure switch normally closed interlock, close valve position position limit switch normally closed interlock, closing a unlock button switch in parallel on valve position position limit switch normally closed interlock.
3. valve used pneumatic actuator according to claim 1 and 2, is characterized in that the housing (3) in the middle part of locking bar (4) is upward installed a unlocking signal switch (6) and block signal switch (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210070596 CN102588662B (en) | 2012-03-14 | 2012-03-14 | Pneumatic actuator of valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210070596 CN102588662B (en) | 2012-03-14 | 2012-03-14 | Pneumatic actuator of valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102588662A CN102588662A (en) | 2012-07-18 |
| CN102588662B true CN102588662B (en) | 2013-06-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210070596 Active CN102588662B (en) | 2012-03-14 | 2012-03-14 | Pneumatic actuator of valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102588662B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105220968B (en) * | 2015-10-10 | 2018-01-19 | 石志刚 | A kind of semi-automatic pneumatic lock and its method of work |
| CN107152550B (en) * | 2017-04-20 | 2023-08-29 | 天津诺科流体控制设备有限公司 | Gas signal information feedback method and gas signal feedback system of valve pneumatic actuator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201277174Y (en) * | 2008-10-17 | 2009-07-22 | 浙江力诺阀门有限公司 | Safety device of actuator |
| CN201723825U (en) * | 2010-07-07 | 2011-01-26 | 成都欣国立低温科技有限公司 | Crank link pneumatic actuator |
| CN102155573A (en) * | 2011-04-18 | 2011-08-17 | 浙江超达阀门股份有限公司 | Control device capable of ensuring safe operation of pneumatic valve |
| CN202484402U (en) * | 2012-03-14 | 2012-10-10 | 伯特利阀门集团有限公司 | Pneumatic actuator for valves |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008137550A2 (en) * | 2007-05-03 | 2008-11-13 | Wabtec Holding Corp. | Locking mechanism for pneumatic differential engine for power-operated doors |
-
2012
- 2012-03-14 CN CN 201210070596 patent/CN102588662B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201277174Y (en) * | 2008-10-17 | 2009-07-22 | 浙江力诺阀门有限公司 | Safety device of actuator |
| CN201723825U (en) * | 2010-07-07 | 2011-01-26 | 成都欣国立低温科技有限公司 | Crank link pneumatic actuator |
| CN102155573A (en) * | 2011-04-18 | 2011-08-17 | 浙江超达阀门股份有限公司 | Control device capable of ensuring safe operation of pneumatic valve |
| CN202484402U (en) * | 2012-03-14 | 2012-10-10 | 伯特利阀门集团有限公司 | Pneumatic actuator for valves |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102588662A (en) | 2012-07-18 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20180305 Address after: 325102 Sanjiang Industrial Park, Yongjia County, Wenzhou, Zhejiang Patentee after: Zhejiang Bethel science and Technology Co., Ltd. Address before: 325102 Zhejiang province Yongjia County Oubei Town East Industrial Zone Patentee before: Boteli Valve Group Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 325102 Sanjiang Industrial Park Yongjia County Wenzhou city Zhejiang Province Patentee after: Zhejiang bertley Technology Co.,Ltd. Address before: 325102 Sanjiang Industrial Park Yongjia County Wenzhou city Zhejiang Province Patentee before: ZHEJIANG BOTELI VALVE Group |