CN103133749A - Electrical-gas valve positioner with limiting position protecting part - Google Patents
Electrical-gas valve positioner with limiting position protecting part Download PDFInfo
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- CN103133749A CN103133749A CN2013100551245A CN201310055124A CN103133749A CN 103133749 A CN103133749 A CN 103133749A CN 2013100551245 A CN2013100551245 A CN 2013100551245A CN 201310055124 A CN201310055124 A CN 201310055124A CN 103133749 A CN103133749 A CN 103133749A
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- valve positioner
- feedback rod
- gas valve
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Abstract
The invention discloses an electrical-gas valve positioner with a limiting position protecting part. The electrical-gas valve positioner comprises a cavity, a torque motor, a feedback rod assembly and a limiting switch. The feedback rod assembly comprises a driving feedback rod and a driven feedback rod, wherein the driven feedback rod is connected with the driving feedback rod through a feedback linkage gear, and a limiting switch cam is arranged on the driving feedback rod. Due to the fact that the limiting switch is arranged in the electrical-gas valve positioner, the driving feedback rod directly performs feedback of a cylinder to the valve positioner and the limiting switch, an installing space is saved, the requirement that the limiting position protecting part is installed at a narrow installing position is met, and control part installation is simplified.
Description
Technical field
The present invention relates to a kind of electricity-gas valve positioner, particularly relate to a kind of electricity-gas valve positioner with the limit position protection.
Background technique
Valve operator in actual use not only needs to understand position when early gate, needs simultaneously the limit action of valve is protected.the mechanical type electricity-gas valve positioner must possess the i.e. 4～20mA constant current power supply of two conditions before normal operation, 1.4 the constant source of the gas of～7.0kgf/cm2, the current signal of bestowing by the external world comes the driving moment motor sub-assembly, when given electric current changes, thereby the armature in the torque motor assembly is issued to certain new position change baffle plate and the distance between nozzle according to the variation in magnetic field in the driving of leverage, give regularly between nozzle and baffle plate when source of the gas and can form certain back pressure, this back pressure can not keep constant when baffle plate and nozzle location change, the positioning work piece everything will stop this moment, only maintain an equilibrium position.Back pressure changes when baffle position changes, pilot valve core begins action, begin to have this moment pressurized air to flow between air inlet/outlet, after entering cylinder, this gas causes the cylinder action, the feedback rod assembly is changed by cylinder traction occurrence positions in the cylinder action, through being reacted to the change of the pulling force of spring after above change, when spring stop position reply again, pilot valve is in state of equilibrium, and when air inlet/outlet has pressurized air to flow, a control procedure of whole positioning work piece does not finish.Need to add in addition limit switch when using mechanical type electricity-gas valve positioner control valve to protect limit position; but under some special occasions; on-the-spot installing space is less and can only abandon the installation of limit switch can't hold a plurality of controlling component the time and cause the disappearance of monitoring and protection, and installing respectively of a plurality of parts also can't be realized the integrated explosion proof system of controlling component in addition.
Summary of the invention
The purpose of this invention is to provide a kind of small and exquisite electricity-gas valve positioner of volume of integrating limit switch, solving on-the-spot installing space has installation question in limited time, simplifies the installation of controlling component.
Technological scheme of the present invention is such: a kind of electricity-gas valve positioner with the limit position protection; comprise cavity, torque motor, feedback rod assembly and limit switch; it is characterized in that: described feedback rod assembly comprises active feedback bar and driven feedback rod; driven feedback rod is connected with the active feedback bar by the feedback linkage gear, and described active feedback bar is provided with the limit switch cam.
In a specific embodiment of the present invention, in order to realize the explosion-proof of electricity-gas valve positioner, described cavity is divided into locating mould cavity and explosion-proof die cavity by central diaphragm, described torque motor and driven feedback rod are arranged in locating mould cavity, described active feedback bar is arranged in explosion-proof die cavity, also be provided with tenminal block in described explosion-proof die cavity, described central diaphragm is provided with through hole, described through hole is provided with explosion-proof screw thread, the wiring of described torque motor is passed through hole and is connected with tenminal block, and the wiring of described limit switch is connected with tenminal block.
The advantage of technological scheme provided by the present invention is; the limit switch cam is set on the active feedback bar; when positioning work piece moves; cylinder operation drives the motion of active feedback bar; when action reaches the limit of the position; the limit switch cam triggers limit switch contact, has reached the effect of protecting actuator's limit position.Because limit switch is arranged in electricity-gas valve positioner; the feedback of cylinder directly feeds back to valve positioner and limit switch by an active feedback bar; saved installing space, satisfied the requirement that the limit position guard block is installed in narrow and small mounting point, simplified controlling component and install.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is feedback rod modular construction schematic diagram in the present invention;
Fig. 3 is cavity and central diaphragm structural representation.
Embodiment
The invention will be further described below in conjunction with embodiment, but not as a limitation of the invention.
See also Fig. 1; electricity-gas valve positioner with the limit position protection; comprise cavity 1, torque motor 2, feedback rod assembly 3 and limit switch 4; see also Fig. 2 feedback rod assembly 3 and comprise active feedback bar 31 and driven feedback rod 32; driven feedback rod 32 is connected with active feedback bar 31 by feedback linkage gear 33, and active feedback bar 31 is provided with limit switch cam 41.Electricity-gas valve positioner is after the 4～20mA current signal that receives the control end conveying, 2 actions of driving moment motor cause valve positioner output gas signal intensity, corresponding change occurs in the aperture of corresponding cylinder 6, when cylinder 6 apertures change, 61 actions of band dynamic air cylinder coupling shaft, cylinder coupling shaft 61 is rigidly connected by connecting plate 7 and active feedback bar 31.The action of cylinder coupling shaft 61 transfers to active feedback bar 31, because driven feedback rod 32 is connected with active feedback bar 31 by feedback linkage gear 33,31 actions of active feedback bar drive driven feedback rod 32 actions, and driven feedback rod 32 feeds back to electricity-gas valve positioner with the cylinder action; Active feedback bar 31 action drives the limit switch cam 41 that arranges it on simultaneously, and when cylinder stroke reached capacity the position, limit position signal was namely sent in corresponding limit switch cam 41 triggering limit switch 4 contacts.
See also again Fig. 1 and Fig. 3, cavity 1 is divided into locating mould cavity 12 and explosion-proof die cavity 13 by central diaphragm 11, torque motor 2 and driven feedback rod 32 are arranged in locating mould cavity 12, active feedback bar 31 is arranged in explosion-proof die cavity 13, also be provided with tenminal block in explosion-proof die cavity 13, central diaphragm 11 is provided with through hole 11a, and through hole 11a is provided with explosion-proof screw thread 11b, the wiring of torque motor 2 is passed through hole 11a and is connected with tenminal block 5, and the wiring of limit switch 4 is connected with tenminal block 5.Partly be arranged in the explosion-proof die cavity with blasting resistance structure by the electrical wiring of this structural change with electricity-gas valve positioner, thereby realize the explosion-proof of electricity-gas valve positioner.
Claims (2)
1. electricity-gas valve positioner with limit position protection; comprise cavity (1), torque motor (2), feedback rod assembly (3) and limit switch (4); it is characterized in that: described feedback rod assembly (3) comprises active feedback bar (31) and driven feedback rod (32); driven feedback rod (32) is connected with active feedback bar (31) by feedback linkage gear (33), and described active feedback bar (31) is provided with limit switch cam (41).
2. the electricity-gas valve positioner with limit position protection according to claim 1, it is characterized in that: described cavity (1) is divided into locating mould cavity (12) and explosion-proof die cavity (13) by central diaphragm (11), described torque motor (2) and driven feedback rod (32) are arranged in locating mould cavity (12), described active feedback bar (31) is arranged in explosion-proof die cavity (13), also be provided with tenminal block (5) in described explosion-proof die cavity (13), described central diaphragm (11) is provided with through hole (11a), described through hole (11a) is provided with explosion-proof screw thread (11b), the wiring of described torque motor (2) is passed through hole (11a) and is connected with tenminal block (5), the wiring of described limit switch (4) is connected with tenminal block (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310055124.5A CN103133749B (en) | 2013-02-21 | 2013-02-21 | Electrical-gas valve positioner with limiting position protecting part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310055124.5A CN103133749B (en) | 2013-02-21 | 2013-02-21 | Electrical-gas valve positioner with limiting position protecting part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103133749A true CN103133749A (en) | 2013-06-05 |
| CN103133749B CN103133749B (en) | 2014-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201310055124.5A Active CN103133749B (en) | 2013-02-21 | 2013-02-21 | Electrical-gas valve positioner with limiting position protecting part |
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| CN (1) | CN103133749B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335152A (en) * | 2013-06-13 | 2013-10-02 | 常熟市惠尔石化仪表有限公司 | Intelligent electro-pneumatic valve positioner with three-failure protection function |
| CN104613230A (en) * | 2015-02-06 | 2015-05-13 | 常熟市华夏仪表有限公司 | Explosion proof type intelligent electrical valve positioner |
| CN106247925A (en) * | 2016-07-18 | 2016-12-21 | 连云港杰瑞电子有限公司 | A kind of position, digital angle transmitter of band limit switch |
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| CN2388447Y (en) * | 1999-07-02 | 2000-07-19 | 深圳汉光电子技术有限公司 | Motor-operated valve of limit switch with switch limiting position |
| GB2418470A (en) * | 2004-09-24 | 2006-03-29 | Laurence Carolan | Control device |
| CN101205978A (en) * | 2006-12-19 | 2008-06-25 | 株式会社山武 | Electric control valve and electric execution element |
| CN101324276A (en) * | 2007-06-11 | 2008-12-17 | 日本泰雅阀门株式会社 | Limiting switch motion mechanism of diaphragm valve |
| KR20090044128A (en) * | 2007-10-31 | 2009-05-07 | 동양매직 주식회사 | The assembly of plug valve |
| CN201651507U (en) * | 2008-06-04 | 2010-11-24 | 韩国永泰公司 | Automatic position control device for linear electro pneumatic valve switch |
| KR20110100557A (en) * | 2010-03-04 | 2011-09-14 | 캄텍주식회사 | Gas control valve for vehicle |
| CN202405941U (en) * | 2011-11-26 | 2012-08-29 | 上海一诺仪表有限公司 | Anti-explosion electric executing mechanism for high-pressure flow auto-control instrument |
| CN203146979U (en) * | 2013-02-21 | 2013-08-21 | 常熟市维特隆自动化仪表厂 | Electric-pneumatic valve positioner with limit position protection function |
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2013
- 2013-02-21 CN CN201310055124.5A patent/CN103133749B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2388447Y (en) * | 1999-07-02 | 2000-07-19 | 深圳汉光电子技术有限公司 | Motor-operated valve of limit switch with switch limiting position |
| GB2418470A (en) * | 2004-09-24 | 2006-03-29 | Laurence Carolan | Control device |
| CN101205978A (en) * | 2006-12-19 | 2008-06-25 | 株式会社山武 | Electric control valve and electric execution element |
| CN101324276A (en) * | 2007-06-11 | 2008-12-17 | 日本泰雅阀门株式会社 | Limiting switch motion mechanism of diaphragm valve |
| KR20090044128A (en) * | 2007-10-31 | 2009-05-07 | 동양매직 주식회사 | The assembly of plug valve |
| CN201651507U (en) * | 2008-06-04 | 2010-11-24 | 韩国永泰公司 | Automatic position control device for linear electro pneumatic valve switch |
| KR20110100557A (en) * | 2010-03-04 | 2011-09-14 | 캄텍주식회사 | Gas control valve for vehicle |
| CN202405941U (en) * | 2011-11-26 | 2012-08-29 | 上海一诺仪表有限公司 | Anti-explosion electric executing mechanism for high-pressure flow auto-control instrument |
| CN203146979U (en) * | 2013-02-21 | 2013-08-21 | 常熟市维特隆自动化仪表厂 | Electric-pneumatic valve positioner with limit position protection function |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335152A (en) * | 2013-06-13 | 2013-10-02 | 常熟市惠尔石化仪表有限公司 | Intelligent electro-pneumatic valve positioner with three-failure protection function |
| CN104613230A (en) * | 2015-02-06 | 2015-05-13 | 常熟市华夏仪表有限公司 | Explosion proof type intelligent electrical valve positioner |
| CN106247925A (en) * | 2016-07-18 | 2016-12-21 | 连云港杰瑞电子有限公司 | A kind of position, digital angle transmitter of band limit switch |
| CN106247925B (en) * | 2016-07-18 | 2019-01-18 | 连云港杰瑞电子有限公司 | A kind of digital angle position transmitter with limit switch |
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|---|---|
| CN103133749B (en) | 2014-11-12 |
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